:root{--ink:#1d4339;--deep:#103f35;--green:#129184;--muted:#687d76;--line:#d9e7e2;--soft:#f3faf7;--warn:#fff4ef;--blue:#edf6ff;--pink:#fff1f7;--yellow:#fff8dd;--purple:#f4efff}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#f7faf8;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#233f38}button,input,textarea,select{font:inherit}
.ribbon{position:sticky;top:0;z-index:60;background:var(--deep);color:#fff;text-align:center;padding:8px 12px;font-size:11px;font-weight:900;letter-spacing:.04em}
.shell{max-width:1180px;margin:auto;padding:22px 16px 72px}.topbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}.back{border:1px solid var(--line);background:#fff;border-radius:11px;padding:9px 12px;font-weight:800;color:#285247;cursor:pointer}.pill{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#e9f6f1;color:#176b5e;font-size:11px;font-weight:900}
.card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 14px 34px rgba(31,72,60,.055)}.hero{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(280px,.7fr);gap:16px}.hero-main{padding:26px}.hero h1{margin:8px 0 10px;font-size:34px;color:var(--ink)}.hero p{margin:0;color:#5d746c;line-height:1.65}.source{margin-top:13px;padding:10px 12px;border-radius:12px;background:#f5f8f7;color:#61736d;font-size:12px;line-height:1.55}.today{padding:20px}.today h3{margin:8px 0}.today ul{padding-left:18px;color:#5c716a;line-height:1.7}
.primary,.secondary,.chip{border-radius:11px;padding:10px 13px;font-weight:850;cursor:pointer}.primary{border:0;background:var(--green);color:#fff}.secondary{border:1px solid #cfe2dc;background:#f2f8f5;color:#175e54}.chip{border:1px solid #d4e3de;background:#fff;color:#567067;padding:7px 9px;font-size:10px}.chip.active{background:var(--deep);color:#fff;border-color:var(--deep)}
.section{margin-top:18px}.section h2{margin:0;color:var(--ink);font-size:23px}.sub{margin:5px 0 12px;color:#74857f;font-size:12px}.lesson-map{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.lesson-map button{border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px;text-align:left;cursor:pointer;transition:.18s ease}.lesson-map button:hover{transform:translateY(-2px);box-shadow:0 9px 18px rgba(30,73,61,.08)}.lesson-map b{display:block;color:#23493f;font-size:12px}.lesson-map small{display:block;margin-top:4px;color:#73847e;font-size:10px}
.mastery{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin:16px 0 10px}.master{padding:12px;border:1px solid var(--line);border-radius:13px;background:#fff}.master span,.master small{display:block;color:#748780;font-size:10px;font-weight:800}.master strong{display:block;font-size:22px;margin:4px 0;color:#21483e}.bar{height:6px;background:#e9efed;border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;background:#43a995}
.tabs{display:flex;gap:7px;overflow:auto;padding:4px 0 12px}.tabs button{white-space:nowrap;border:1px solid #d4e4de;background:#fff;color:#45645c;border-radius:999px;padding:9px 12px;font-weight:850;cursor:pointer}.tabs button.active{background:var(--deep);color:#fff;border-color:var(--deep)}.panel{display:none}.panel.active{display:block}.panel-card{padding:18px;margin-bottom:12px}.panel-card h3{margin:0 0 8px;color:#21483e}.panel-card p{color:#647972;line-height:1.55}
.section-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start}.voice-tools{display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.voice-tools>span{font-size:10px;color:#71827c;font-weight:750}
.filters{display:flex;gap:6px;flex-wrap:wrap;margin:11px 0 13px}.filters button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px;font-size:10px;font-weight:850;color:#577068;cursor:pointer}.filters button.active{background:var(--deep);color:#fff;border-color:var(--deep)}.filters button small{opacity:.72}
.vocab-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.vocab-card{display:grid;grid-template-columns:68px 1fr auto;gap:11px;align-items:center;padding:12px;border:1px solid #e0ebe7;border-radius:16px;background:linear-gradient(145deg,#fff,#f9fcfb);box-shadow:0 7px 0 #e7f0ec,0 12px 24px rgba(35,75,64,.06);transition:.18s ease}.vocab-card:hover{transform:translateY(-3px)}.vocab-visual{width:62px;height:62px;border-radius:18px;display:grid;place-items:center;font-size:31px;background:linear-gradient(145deg,#fff8df,#eff8ff);box-shadow:inset 0 1px 0 #fff,0 7px 12px rgba(60,80,75,.12),0 2px 0 #dce8e4;transform:perspective(300px) rotateX(2deg) rotateY(-3deg)}.cat{display:block;width:max-content;margin-bottom:4px;padding:3px 6px;border-radius:99px;background:#eef7f3;color:#397064;font-size:8px;font-weight:900;text-transform:uppercase}.vocab-card b{font-size:17px;color:#173f36}.vocab-card em{font-style:normal;color:#0f766e;font-weight:750;font-size:12px}.vocab-card small{display:block;color:#657871;margin-top:3px;line-height:1.45}.sound{border:1px solid #d4e5df;background:#fff;border-radius:10px;width:42px;height:40px;cursor:pointer}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.space-top{margin-top:12px}.input{width:100%;min-height:43px;border:1px solid #cfded8;border-radius:10px;padding:9px 11px;background:#fff}.writing{min-height:130px;resize:vertical}.exercise{display:grid;gap:10px}.meta{display:flex;justify-content:space-between;gap:8px;color:#74847f;font-size:10px;font-weight:850}.prompt{padding:14px;border-radius:13px;background:#f4faf7;font-size:18px;font-weight:850;color:#1f433a}.options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.options button{border:1px solid #d6e4df;background:#fff;border-radius:11px;min-height:44px;padding:8px 11px;text-align:left;font-weight:750;cursor:pointer}.options button.correct{background:#e8f7ee;border-color:#77bd93}.options button.wrong{background:#fff0ed;border-color:#e6a093}.feedback{padding:10px 11px;border-radius:10px;font-weight:750}.feedback.ok{background:#e9f8ef;color:#20633d}.feedback.bad{background:#fff1ee;color:#9b3f32}
.theory-grid{display:grid;gap:10px}.theory{border:1px solid var(--line);border-radius:14px;background:#fbfdfc;overflow:hidden}.theory summary{cursor:pointer;padding:13px 14px;font-weight:900;color:#21493f;list-style:none}.theory summary::-webkit-details-marker{display:none}.theory-body{padding:0 14px 14px;color:#516861;line-height:1.6}.formula{padding:9px 11px;margin:7px 0;border-left:4px solid #47aa96;background:#f2f9f6;border-radius:0 10px 10px 0}.example{margin:6px 0;padding:8px 10px;border-radius:10px;background:#f8faf9}.example b{color:#174a3f}.vi{color:#6e817a;font-size:12px}.special{padding:10px;border-radius:10px;background:#fff6df;color:#705c22}.error{padding:10px;border-radius:10px;background:#fff0ed;color:#87483c}
.activity-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px}.activity-tile{position:relative;border:1px solid rgba(33,74,61,.08);border-radius:18px;padding:15px;text-align:left;cursor:pointer;min-height:118px;box-shadow:0 8px 0 rgba(43,83,71,.10),0 14px 26px rgba(42,74,65,.08);transition:.18s ease;overflow:hidden}.activity-tile:hover{transform:translateY(-4px) rotateX(1deg);box-shadow:0 11px 0 rgba(43,83,71,.10),0 18px 30px rgba(42,74,65,.11)}.activity-tile:nth-child(4n+1){background:linear-gradient(145deg,#fff0f6,#fff)}.activity-tile:nth-child(4n+2){background:linear-gradient(145deg,#eef8ff,#fff)}.activity-tile:nth-child(4n+3){background:linear-gradient(145deg,#fff9df,#fff)}.activity-tile:nth-child(4n+4){background:linear-gradient(145deg,#f4efff,#fff)}.activity-tile .ico{font-size:30px;display:block;margin-bottom:7px;filter:drop-shadow(0 4px 4px rgba(0,0,0,.12))}.activity-tile b{display:block;color:#244a40}.activity-tile small{display:block;margin-top:5px;color:#6c7e78}.activity-tile strong{position:absolute;top:10px;right:10px;padding:4px 7px;border-radius:99px;background:#fff9;color:#43645a;font-size:9px}
.audio-bar{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.vertical-questions{display:grid;gap:10px}.q-card{padding:13px;border:1px solid var(--line);border-radius:14px;background:#fcfefd}.q-card h4{margin:0 0 8px;color:#24483f}.q-card .q-vi{margin:7px 0;padding:8px 10px;background:#f4f8f6;border-radius:9px;color:#5e746d;font-size:12px}.q-options{display:grid;gap:6px}.q-options label{display:flex;align-items:center;gap:8px;padding:8px 10px;border:1px solid #e1ebe7;border-radius:10px;background:#fff;cursor:pointer}.q-options input{accent-color:var(--green)}.small-toggle{border:0;background:none;color:#137a6d;font-size:10px;font-weight:850;cursor:pointer;padding:2px 0}.reading-box{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fbfdfc}.reading-en{font-size:15px;line-height:1.85;color:#3f5c54}.reading-vi{margin-top:12px;padding-top:12px;border-top:1px dashed #cedbd6;line-height:1.75;color:#657972}.hidden{display:none!important}.prompt-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin:10px 0}.prompt-grid div{padding:8px 10px;border-radius:10px;background:#f6faf8;border:1px solid #e2ebe7;font-size:12px;color:#587068}
.results{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}.result{padding:13px;border-radius:13px;background:#f6faf8;border:1px solid var(--line)}.result span,.result small{display:block;font-size:9px;color:#71817b;font-weight:800}.result strong{display:block;font-size:22px;color:#173f36;margin:4px 0}.weak-list{display:grid;gap:7px}.weak{padding:9px 11px;border:1px solid #ecd7cf;background:#fff8f5;border-radius:10px;color:#7e493d;font-size:12px}.recommend{margin-top:13px;padding:14px;border-radius:14px;border:1px solid #cfe4dc;background:linear-gradient(145deg,#f1faf6,#fff)}
.submit-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.block-label{display:grid;gap:5px;margin-top:10px}.block-label span,.submit-grid span{font-size:10px;font-weight:850;color:#657c74}.submission-card{border:1px solid #b9dbd1;background:linear-gradient(145deg,#fff,#f6fcf9)}
.teacher-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.teacher-summary>div{padding:13px;border:1px solid var(--line);border-radius:13px;background:#f8fbfa}.teacher-summary span,.teacher-summary small{display:block;color:#72847e;font-size:9px;font-weight:800}.teacher-summary strong{display:block;margin:4px 0;font-size:24px;color:#1e4a40}.teacher-cols{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.teacher-cols>div{padding:13px;border:1px solid #e0e9e5;border-radius:13px}.teacher-cols h4{margin:0 0 7px}.teacher-cols p{margin:4px 0;color:#5c716a;font-size:11px}.submission{margin-top:12px;padding:14px;border:1px solid #cfe3dc;border-radius:14px;background:#fbfefd}.submission h4{margin:0 0 8px}.teacher-grade{display:grid;grid-template-columns:120px 1fr auto;gap:8px;align-items:end;margin-top:10px}
@media(max-width:950px){.hero{grid-template-columns:1fr}.lesson-map{grid-template-columns:repeat(2,1fr)}.mastery{grid-template-columns:repeat(3,1fr)}.activity-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.shell{padding:14px 10px 60px}.hero-main{padding:20px}.hero h1{font-size:28px}.lesson-map,.vocab-grid,.options,.results,.teacher-summary,.teacher-cols,.submit-grid,.prompt-grid{grid-template-columns:1fr}.mastery{grid-template-columns:repeat(2,1fr)}.activity-grid{grid-template-columns:1fr 1fr}.section-head{flex-direction:column}.voice-tools{justify-content:flex-start}.teacher-grade{grid-template-columns:1fr}.q-card{padding:11px}}
@media(max-width:430px){.activity-grid{grid-template-columns:1fr}.tabs{gap:5px}.tabs button{padding:8px 10px}.vocab-card{grid-template-columns:58px 1fr auto}.vocab-visual{width:54px;height:54px;font-size:27px}}

/* v1.1 · stronger 3D / tactile visual language */
.vocab-card{position:relative;transform-style:preserve-3d;border-bottom:4px solid #cfe3dc;box-shadow:0 10px 0 #dbeae5,0 20px 32px rgba(27,69,57,.10)}
.vocab-card::after{content:"";position:absolute;inset:1px 1px auto 1px;height:38%;border-radius:15px 15px 40% 40%;background:linear-gradient(180deg,rgba(255,255,255,.65),rgba(255,255,255,0));pointer-events:none}
.vocab-card:hover{transform:perspective(700px) translateY(-6px) rotateX(1.5deg);box-shadow:0 13px 0 #d2e4de,0 26px 38px rgba(27,69,57,.13)}
.vocab-visual{position:relative;z-index:2;border:1px solid rgba(64,96,84,.10);box-shadow:inset -6px -8px 12px rgba(60,100,90,.08),inset 5px 5px 10px rgba(255,255,255,.85),0 8px 0 #d8e7e2,0 13px 18px rgba(40,72,63,.15);transform:perspective(400px) rotateX(7deg) rotateY(-6deg) translateZ(8px)}
.activity-tile{transform-style:preserve-3d;border-bottom:5px solid rgba(42,78,68,.12);box-shadow:0 10px 0 rgba(42,78,68,.12),0 20px 32px rgba(36,75,64,.10)}
.activity-tile::before{content:"";position:absolute;left:9px;right:9px;top:7px;height:34%;border-radius:14px;background:linear-gradient(180deg,rgba(255,255,255,.72),rgba(255,255,255,0));pointer-events:none}
.activity-tile:hover{transform:perspective(700px) translateY(-7px) rotateX(2deg) rotateY(-1deg);box-shadow:0 14px 0 rgba(42,78,68,.11),0 28px 40px rgba(36,75,64,.14)}
.activity-tile .ico{position:relative;z-index:2;transform:translateZ(16px);font-size:34px}
.activity-tile b,.activity-tile small,.activity-tile strong{position:relative;z-index:2}

/* v1.2 · đúng cơ chế game + hiệu ứng */
.game-top{display:flex;justify-content:space-between;gap:12px;align-items:center}.game-top b{display:block;color:#21483e;font-size:16px}.game-top small{display:block;margin-top:2px;color:#70817b;font-size:10px}.game-streak{min-width:54px;text-align:center;padding:7px 10px;border-radius:999px;background:#fff4dc;border:1px solid #f2d995;font-weight:900;color:#8d6510}.game-progress{height:8px;margin:9px 0 14px;border-radius:999px;background:#e9efed;overflow:hidden}.game-progress i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#2fb49b,#8bd8b8);transition:width .3s ease}.game-stage{position:relative;min-height:190px}
.match-help{margin-bottom:12px;padding:10px 12px;border-radius:12px;background:#eff8f5;color:#55716a;font-size:12px}.match-board{display:grid;grid-template-columns:1fr 44px 1fr;gap:10px;align-items:start}.match-col{display:grid;gap:9px}.match-link{align-self:center;text-align:center;font-size:26px;color:#7fa89d}.match-card{min-height:74px;border:1px solid #dce8e4;border-radius:15px;background:linear-gradient(145deg,#fff,#f8fcfa);box-shadow:0 6px 0 #dfeae6,0 10px 18px rgba(31,72,61,.07);cursor:pointer;transition:.16s ease}.match-card:hover{transform:translateY(-2px)}.match-card.selected{outline:3px solid #43a995;background:#eaf8f3}.match-card.matched{opacity:.42;filter:grayscale(.25);box-shadow:none;transform:none;pointer-events:none}.match-left{display:grid;grid-template-columns:50px 1fr;align-items:center;text-align:left;padding:9px}.match-visual{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:linear-gradient(145deg,#fff4cf,#ecf8ff);box-shadow:inset -4px -5px 8px rgba(60,100,90,.08),0 5px 0 #d9e8e2;font-size:25px}.match-left small{font-weight:800;color:#5f746d}.match-right{padding:10px 12px;text-align:left}.match-right b{display:block;font-size:16px;color:#193f36}.match-right small{color:#698079}
.circle-instruction{font-size:12px;color:#60756e}.circle-sentence{padding:15px;border-radius:16px;background:linear-gradient(145deg,#f2faf7,#fff);font-size:19px;line-height:1.55;font-weight:800;color:#173f36;border:1px solid #dfeae6}.circle-hint{color:#72847d}.circle-row{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.circle-choice{position:relative;border:2px solid #d4e4de;background:#fff;border-radius:999px;padding:12px 18px;font-weight:850;cursor:pointer;transition:.18s ease}.circle-choice:hover{transform:translateY(-3px);box-shadow:0 7px 15px rgba(34,76,64,.10)}.circle-choice.circled,.circle-choice.circle-correct{border-color:#16a085;box-shadow:0 0 0 5px rgba(22,160,133,.13);background:#effaf6}.circle-choice.circle-wrong{border-color:#e18575;background:#fff1ed}.circle-choice.circle-correct::after{content:"✓";position:absolute;right:-7px;top:-10px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:#159b83;color:#fff;font-size:12px}
.listen-game{text-align:center}.listen-orb{width:92px;height:92px;margin:0 auto 10px;display:grid;place-items:center;border-radius:50%;font-size:40px;background:radial-gradient(circle at 35% 30%,#fff,#dff4ef 48%,#a9d9ce);box-shadow:inset -10px -12px 18px rgba(37,116,99,.16),0 10px 0 #bddfd7,0 18px 28px rgba(32,82,69,.14);animation:floatOrb 2.2s ease-in-out infinite}.listen-play{min-width:180px}.listen-game p{color:#687d76}.listen-card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.listen-choice{min-height:118px;border:1px solid #dce7e3;border-radius:17px;background:linear-gradient(145deg,#fff,#f9fcfb);box-shadow:0 8px 0 #dfe9e5,0 14px 24px rgba(34,72,62,.08);cursor:pointer;transition:.18s ease}.listen-choice span{display:block;font-size:34px;filter:drop-shadow(0 5px 4px rgba(0,0,0,.10))}.listen-choice b{display:block;margin-top:6px;color:#21483e}.listen-choice:hover{transform:translateY(-4px)}.listen-choice.listen-correct{outline:3px solid #38aa8f;background:#effaf6}.listen-choice.listen-wrong{outline:3px solid #e38777;background:#fff1ed}
.letter-cloud,.block-row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;padding:14px;border-radius:15px;background:#f7fbf9;border:1px solid #dfeae6;font-weight:850;color:#21483e}.block-row span{padding:8px 11px;border-radius:11px;background:#fff;box-shadow:0 4px 0 #dbe8e3;border:1px solid #dce7e3}.look-write-card{display:grid;justify-items:center;gap:8px;padding:12px}.game-hero-visual{width:94px!important;height:94px!important;font-size:48px!important}
.game-spark{position:absolute;left:50%;top:55%;z-index:20;pointer-events:none;font-size:18px;animation:sparkFly .8s ease-out forwards}.shake{animation:shake .35s ease}
@keyframes sparkFly{0%{transform:translate(-50%,-50%) scale(.6);opacity:0}20%{opacity:1}100%{transform:translate(calc(-50% + var(--x)),calc(-50% + var(--y))) scale(1.25);opacity:0}}@keyframes floatOrb{50%{transform:translateY(-6px)}}@keyframes shake{25%{transform:translateX(-6px)}50%{transform:translateX(6px)}75%{transform:translateX(-4px)}}
@media(max-width:720px){.match-board{grid-template-columns:1fr 24px 1fr}.match-left{grid-template-columns:42px 1fr}.match-visual{width:38px;height:38px}.listen-card-grid{grid-template-columns:repeat(2,1fr)}}

/* v1.3 · tactile tile games + completion/review */
.tile-instruction{font-size:12px;color:#60756e;margin-bottom:8px}.tile-answer{min-height:64px;display:flex;gap:7px;flex-wrap:wrap;align-items:center;justify-content:center;padding:12px;border:2px dashed #bfd8d0;border-radius:15px;background:#f8fcfa;margin-bottom:12px}.tile-answer em{color:#8a9894;font-size:12px}.tile-answer span{display:inline-grid;place-items:center;min-width:38px;min-height:38px;padding:7px 10px;border-radius:10px;background:#fff;box-shadow:0 4px 0 #d9e7e2;border:1px solid #dce8e3;font-weight:900;color:#1f493f}
.letter-tiles,.sentence-tiles,.word-bank{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:10px 0 14px}.letter-tiles button,.sentence-tiles button,.word-bank button{border:1px solid #d7e5e0;background:linear-gradient(145deg,#fff,#f8fbfa);border-radius:12px;padding:10px 13px;font-weight:900;color:#244c42;cursor:pointer;box-shadow:0 5px 0 #dbe8e3,0 9px 14px rgba(35,73,63,.07);transition:.15s ease}.letter-tiles button:hover,.sentence-tiles button:hover,.word-bank button:hover{transform:translateY(-3px)}.letter-tiles button.used,.sentence-tiles button.used{opacity:.28;box-shadow:none}.word-bank button.fill-correct{background:#eaf8f1;border-color:#59b892}.word-bank button.fill-wrong{background:#fff0ec;border-color:#df8f7f}
.game-finish{text-align:center;padding:24px 12px}.game-finish .plant-reward{width:92px;height:92px;margin:0 auto 12px;display:grid;place-items:center;font-size:48px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#e9f8ef 46%,#b9e0c7);box-shadow:0 10px 0 #cce4d5,0 18px 30px rgba(37,92,65,.12);animation:rewardPop .55s ease}.game-finish h3{margin:8px 0 5px}.game-finish p{color:#657a73}@keyframes rewardPop{0%{transform:scale(.5);opacity:0}70%{transform:scale(1.1)}100%{transform:scale(1);opacity:1}}

/* v1.4 · detailed visuals + distinct activity mechanics */
.sgk-rich-visual{position:relative;display:grid;place-items:center;overflow:hidden;border-radius:22px;background:radial-gradient(circle at 30% 25%,#fff,#eaf7f4 55%,#cee8df);box-shadow:inset -10px -12px 18px rgba(27,104,88,.12),inset 6px 7px 16px rgba(255,255,255,.82),0 9px 0 #d4e5df,0 16px 24px rgba(31,76,64,.12);isolation:isolate}
.sgk-rich-visual.small{width:70px;height:70px;border-radius:18px}.sgk-rich-visual.hero{width:min(220px,52vw);height:min(220px,52vw);margin:auto}.sgk-rich-visual.choice{width:76px;height:76px;margin:0 auto 7px;border-radius:18px;box-shadow:0 6px 0 #d8e7e2,0 10px 16px rgba(31,76,64,.10)}
.sgk-rich-fallback{font-size:34px;z-index:2;filter:drop-shadow(0 5px 5px rgba(0,0,0,.12))}.hero .sgk-rich-fallback{font-size:76px}.visual-glow{position:absolute;width:55%;height:55%;right:-8%;top:-8%;border-radius:50%;background:rgba(255,255,255,.5);filter:blur(10px);z-index:1}
.repeat-card{display:grid;grid-template-columns:minmax(190px,.7fr) 1.2fr;gap:22px;align-items:center;padding:12px}.repeat-copy h3{font-size:32px;margin:4px 0;color:#173f36}.repeat-copy em{color:#0f766e;font-weight:800;font-style:normal}.repeat-copy p{font-size:17px;margin:5px 0}.repeat-label{display:inline-flex;padding:5px 9px;border-radius:999px;background:#eaf7f3;color:#246a5b;font-size:10px;font-weight:900}.repeat-example{padding:12px 14px;margin:12px 0;border-radius:14px;background:#f7faf9;border:1px solid #dfe9e5;font-weight:750;color:#4b655d}
.match-board.text-match .match-card{min-height:58px}.match-card.text-only{display:flex!important;align-items:center!important;justify-content:center!important;text-align:center!important;padding:10px 12px!important}.match-card.text-only b{font-size:16px!important}.match-board.text-match .match-left{background:linear-gradient(145deg,#eef8ff,#fff)!important}.match-board.text-match .match-right{background:linear-gradient(145deg,#fff7e7,#fff)!important}
.look-write-card{display:grid;justify-items:center;gap:13px;padding:10px}.look-write-card>b{font-size:15px;color:#536d65}
.tick-card{text-align:center;display:grid;gap:13px;justify-items:center}.tick-statement{width:min(620px,100%);padding:15px 18px;border-radius:16px;background:#f7faf9;border:1px solid #dce8e3;font-size:22px;font-weight:900;color:#183f36}.tick-card p{margin:0;color:#667a73}.tick-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:min(520px,100%)}.tick-actions button{min-height:58px;border-radius:15px;border:1px solid #d7e5e0;font-weight:900;font-size:17px;cursor:pointer;box-shadow:0 6px 0 #dce8e3}.tick-yes{background:#effaf4;color:#23724e}.tick-no{background:#fff3ef;color:#985040}.tick-correct{outline:3px solid #43ad83!important;background:#e6f7ee!important}.tick-wrong{outline:3px solid #dc8a78!important;background:#fff0ec!important}
.fill-instruction{padding:10px 12px;border-radius:11px;background:#eef8ff;color:#52707a;font-size:12px}
.listen-choice .sgk-rich-visual{pointer-events:none}.listen-choice{padding:10px!important}.listen-choice b{font-size:13px!important}
@media(max-width:720px){.repeat-card{grid-template-columns:1fr}.repeat-copy{text-align:center}.repeat-copy .row{justify-content:center}.sgk-rich-visual.hero{width:170px;height:170px}.tick-statement{font-size:18px}.match-board.text-match{grid-template-columns:1fr 24px 1fr}}

/* v1.5 · stable inline SVG visuals (no expiring external image URLs) */
.sgk-rich-visual svg{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:3}
.sgk-rich-visual.small svg{padding:3px}
.sgk-rich-visual.hero svg{padding:8px}
.sgk-rich-visual.choice svg{padding:3px}
.sgk-rich-fallback{display:none!important}

/* v1.6 · resilient activity-grid fallback */
.activity-error{grid-column:1/-1;display:grid;gap:5px;padding:18px;border-radius:16px;border:1px solid #efc9bf;background:#fff5f1;color:#87493d}
.activity-error span{font-size:12px;color:#946b62}

/* v1.7 · robust SVG scenes without shared filter/gradient ids */
.sgk-rich-visual svg{z-index:4!important}
.sgk-visual-fallback{display:none!important;position:relative;z-index:2;font-size:52px}
.sgk-rich-visual.small .sgk-visual-fallback{font-size:30px}
.sgk-rich-visual.choice .sgk-visual-fallback{font-size:34px}

/* v1.8 · SGK catalog shell */
.catalog-card{margin:18px 0;padding:20px 22px;border-radius:24px;background:linear-gradient(135deg,#fff 0%,#f4fbf8 55%,#fff8ee 100%);border:1px solid #dce9e4;box-shadow:0 16px 38px rgba(26,74,62,.07)}
.catalog-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;align-items:center}.catalog-head h2{margin:8px 0 5px;font-size:24px;color:#173f36}.catalog-head p{margin:0}
.catalog-status{display:grid;gap:3px;min-width:220px;padding:13px 15px;border-radius:17px;background:#174f45;color:#fff;box-shadow:0 8px 20px rgba(23,79,69,.16)}.catalog-status b{font-size:14px}.catalog-status span{font-size:11px;color:#d9f2ea}
.grade-picker{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:9px;margin-top:18px}.grade-picker>.grade-route-note{grid-column:1 / -1;display:block;min-width:0;line-height:1.5}.grade-route-note b{display:inline;white-space:nowrap}.grade-btn{display:grid;gap:3px;text-align:left;padding:12px 13px;border:1px solid #d8e6e1;border-radius:15px;background:#fff;color:#34584e;cursor:pointer;box-shadow:0 4px 0 #e5efeb}.grade-btn b{font-size:15px}.grade-btn small{font-size:10px;line-height:1.3;color:#788b84}.grade-btn.active{background:linear-gradient(145deg,#e9f8f2,#fbfffd);border-color:#8ac8b8;color:#135f52;box-shadow:0 5px 0 #cfe8df}.grade-btn.locked{opacity:.74;cursor:not-allowed}
.unit-row{display:grid;grid-template-columns:minmax(220px,320px) 1fr;gap:12px;align-items:end;margin-top:14px}.unit-row label{display:grid;gap:6px;font-weight:800;color:#365d52}.unit-row label>span{font-size:11px;text-transform:uppercase;letter-spacing:.06em}.unit-select{background:#fff;font-weight:800;color:#174f45}
.catalog-notice{min-height:46px;display:flex;align-items:center;padding:10px 13px;border-radius:14px;background:#fff7e8;border:1px solid #efdfbb;color:#6a5937;font-size:12px;line-height:1.45}
.lesson-map button.active{border-color:#39a18c!important;background:linear-gradient(145deg,#e7f8f1,#fff)!important;box-shadow:0 0 0 2px rgba(57,161,140,.10),0 7px 0 #d0e9e1!important}.lesson-map button.active b{color:#0f6c5c}
.focus-dot{display:inline-flex;margin-left:4px;padding:3px 6px;border-radius:999px;background:#fff0c7;color:#86651a;font-size:8px;font-weight:950;letter-spacing:.04em;vertical-align:middle}.tabs button.active .focus-dot{background:rgba(255,255,255,.17);color:#fff}.today-focus{color:#2f6759}
@media(max-width:900px){.grade-picker{grid-template-columns:repeat(3,minmax(0,1fr))}.catalog-head{grid-template-columns:1fr}.catalog-status{min-width:0}.unit-row{grid-template-columns:1fr}}
@media(max-width:560px){.catalog-card{padding:16px}.grade-picker{grid-template-columns:repeat(2,minmax(0,1fr))}.grade-btn{padding:10px}.focus-dot{display:none}}

/* v1.9 · lesson plan grounded in Grade 6 Unit 1 lesson files */
.lesson-source-section{margin-top:14px}.lesson-source-card{padding:20px 22px;border-radius:24px;background:linear-gradient(135deg,#fff,#f8fbfa);border:1px solid #dce8e4;box-shadow:0 12px 30px rgba(31,76,64,.06)}
.lesson-source-head{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:15px}.lesson-source-head h2{margin:8px 0 4px;color:#173f36}.lesson-source-head p{margin:0}
.lesson-source-badge{max-width:300px;padding:9px 11px;border-radius:13px;background:#eef7f4;color:#3e675c;font-size:10px;font-weight:800;border:1px solid #d7e9e3}
.lesson-task-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:16px}
.lesson-task{position:relative;display:grid;grid-template-columns:28px 36px 1fr;gap:9px;align-items:center;padding:11px 12px;border-radius:15px;background:#fff;border:1px solid #e1ebe7;box-shadow:0 4px 0 #edf3f1}
.lesson-task-no{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#e9f6f1;color:#176c5c;font-size:10px;font-weight:900}.lesson-task-icon{font-size:21px}
.lesson-task b{display:block;color:#254e43;font-size:13px}.lesson-task small{display:block;margin-top:3px;color:#72857e;font-size:10.5px;line-height:1.4}
.lesson-route{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:14px;padding:12px 13px;border-radius:15px;background:#fff8eb;border:1px solid #eadfbd;color:#6b5a34;font-size:11px}
.lesson-route button{border:1px solid #d8e7e1;background:#fff;border-radius:999px;padding:7px 10px;color:#23594d;font-weight:850;cursor:pointer}.lesson-route span{opacity:.5}.lesson-route button:hover{background:#eaf7f3}
@media(max-width:760px){.lesson-source-head{grid-template-columns:1fr}.lesson-source-badge{max-width:none}.lesson-task-grid{grid-template-columns:1fr}.lesson-route{align-items:flex-start}}

/* v2.0 · real-photo visual layer */
.sgk-rich-visual.photo{background:#eef8f4!important;overflow:hidden!important}
.sgk-rich-visual.photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;z-index:4}
.sgk-rich-visual.photo.hero img{object-fit:cover}
.sgk-rich-visual.photo.small img,.sgk-rich-visual.photo.choice img{object-fit:cover}
.sgk-photo-strip{display:grid;grid-template-columns:110px 110px minmax(0,1fr);gap:10px;margin-top:14px;align-items:stretch}
.sgk-photo-strip figure{margin:0;position:relative;overflow:hidden;border-radius:16px;min-height:92px;background:#eaf6f2;border:1px solid #d4e7df}
.sgk-photo-strip figure img{width:100%;height:100%;min-height:92px;object-fit:cover;display:block}
.sgk-photo-strip figcaption{position:absolute;left:7px;bottom:7px;background:rgba(10,54,47,.78);color:#fff;padding:3px 7px;border-radius:999px;font-size:9px;font-weight:900}
.sgk-photo-note{display:flex;flex-direction:column;justify-content:center;padding:11px 13px;border-radius:16px;background:linear-gradient(135deg,#edf9f4,#f7fbff);border:1px solid #d8e9e3}
.sgk-photo-note b{color:#1d5a4d}.sgk-photo-note span{margin-top:4px;color:#60766f;font-size:11px;line-height:1.5}
@media(max-width:640px){.sgk-photo-strip{grid-template-columns:1fr 1fr}.sgk-photo-note{grid-column:1/-1}}

/* v2.1 · SGK readability + compact mobile navigation */
.catalog-card{margin-bottom:16px}
.lesson-map button.active{border-color:#73b9aa;background:#edf8f4;box-shadow:0 8px 18px rgba(31,105,90,.09)}
.lesson-task-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:12px}
.lesson-task{display:grid;grid-template-columns:28px 34px 1fr;gap:8px;align-items:start;padding:11px;border:1px solid var(--line);border-radius:13px;background:#fbfdfc}
.lesson-task-no{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#e9f6f1;color:#176b5e;font-weight:900;font-size:10px}
.lesson-task-icon{font-size:20px}.lesson-task small{display:block;margin-top:3px;color:#6e807a;line-height:1.4}
.lesson-route{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-top:11px;padding-top:11px;border-top:1px dashed #d8e5e0}
.lesson-route button{border:1px solid #cfe2dc;background:#f4faf7;color:#185f54;border-radius:999px;padding:7px 10px;font-weight:850;cursor:pointer}
.focus-dot{margin-left:4px;padding:2px 5px;border-radius:99px;background:#eef7f3;color:#2b6f62;font-size:8px}
@media(max-width:680px){.lesson-task-grid{grid-template-columns:1fr}.tabs{position:sticky;top:30px;z-index:30;background:#f7faf8;padding-top:7px}}

/* v2.1 source-rich vocabulary/pronunciation */
.pronunciation-card{border-color:#d8e2f3;background:linear-gradient(145deg,#fff,#f8fbff)}
.vocab-card .cat{max-width:100%;white-space:normal}
@media(max-width:680px){.vocab-grid{grid-template-columns:1fr}.vocab-card{grid-template-columns:64px 1fr auto}}

/* v2.1 · real lesson practice banks */
.lesson-practice{margin-top:14px;padding-top:14px;border-top:1px solid #e1ebe7}
.lesson-practice-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:10px}
.lesson-practice-head h3{margin:6px 0 4px;color:#21483e}
.lesson-practice-head p{margin:0;color:#6c7f78;font-size:12px}
.lesson-source-mini{font-size:10px;font-weight:800;color:#557169;background:#f3f8f6;border:1px solid #dce8e3;border-radius:999px;padding:6px 9px;white-space:nowrap}
.lesson-practice-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
.lesson-practice-q{padding:12px;border:1px solid #dce8e3;border-radius:13px;background:#fcfefd}
.lesson-practice-q>b{display:block;margin:6px 0 8px;color:#254a40;line-height:1.45}
@media(max-width:760px){.lesson-practice-list{grid-template-columns:1fr}.lesson-practice-head{flex-direction:column}.lesson-source-mini{white-space:normal}}

/* v2.1.1 · Lesson-first navigation */
.lesson-tab{background:#f6fbf8}
.tabs .lesson-tab.active{background:#184f43;color:#fff}
.lesson-panel{padding-top:12px}
.lesson-source-card-inline{border:2px solid #cfe5dc;box-shadow:0 14px 32px rgba(27,78,65,.08)}
.lesson-callout{margin:10px 0 14px;padding:10px 12px;border-radius:12px;background:#eef8f4;color:#315e52;font-size:13px}
.lesson-panel .lesson-practice{margin-top:18px}
@media(max-width:760px){
  .tabs{scroll-padding-left:12px}
  .tabs .lesson-tab:first-child{position:sticky;left:0;z-index:3}
}

/* v2.1.5 · guaranteed 3D vocabulary visuals */
.sgk-3d-visual{position:relative;display:grid;place-items:center;overflow:hidden;border-radius:22px;background:linear-gradient(145deg,#f9fffd,#dff3ec);border:1px solid #d5eae2;box-shadow:0 10px 0 #d3e9e1,0 18px 28px rgba(31,84,70,.10);isolation:isolate}
.sgk-3d-visual.small{width:68px;height:68px}.sgk-3d-visual.hero{width:275px;height:275px;max-width:100%}.sgk-3d-visual.choice{width:82px;height:82px}.sgk-3d-visual.activity{width:180px;height:180px;margin:10px auto 18px}
.v3d-back{position:absolute;width:68%;height:68%;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#cde8df 70%);box-shadow:inset -10px -12px 20px rgba(28,93,76,.08),10px 15px 24px rgba(29,90,75,.12);transform:translateY(-5%)}
.v3d-orb{position:relative;z-index:2;font-size:clamp(38px,9vw,96px);filter:drop-shadow(0 14px 10px rgba(21,72,59,.20));transform:translateY(-6px)}
.sgk-3d-visual.small .v3d-orb{font-size:36px}.sgk-3d-visual.choice .v3d-orb{font-size:44px}.sgk-3d-visual.activity .v3d-orb{font-size:76px}
.v3d-floor{position:absolute;bottom:12%;width:58%;height:13%;border-radius:50%;background:rgba(30,95,78,.16);filter:blur(3px);transform:perspective(120px) rotateX(62deg)}
.lesson-dialogue-card{margin:14px 0 16px;padding:16px;border:1px solid #d9e9e3;border-radius:18px;background:linear-gradient(145deg,#fff,#f7fbfa)}
.lesson-dialogue-head{display:flex;justify-content:space-between;gap:12px;align-items:center}.lesson-dialogue-head h3{margin:7px 0 0;color:#204a3f}
.dialogue-lines{display:grid;gap:8px;margin-top:12px}.dialogue-line{display:grid;grid-template-columns:70px 1fr;gap:10px;padding:9px 10px;border-radius:12px;background:#fff;border:1px solid #e3eeea}.dialogue-line>b{color:#176455}.dialogue-line span{display:block;color:#274a42;font-weight:700}.dialogue-line small{display:block;margin-top:3px;color:#71827d;line-height:1.45}
.mic-free{border-color:#b8ddd2!important;background:#effaf6!important;color:#136453!important}.mic-free::after{content:' · 0 credit';font-size:9px;opacity:.7}
@media(max-width:680px){.lesson-dialogue-head{align-items:flex-start;flex-direction:column}.dialogue-line{grid-template-columns:1fr}.sgk-3d-visual.hero{width:210px;height:210px}}

/* v2.1.6 · smarter Listen & Repeat */
.smart-repeat{align-items:center}
.repeat-copy,.repeat-copy *{font-family:inherit!important}
.repeat-copy h3{font-size:42px;line-height:1.05;letter-spacing:-.02em;margin:8px 0 5px}
.repeat-copy em{font-size:22px;font-style:normal;font-weight:850;color:#087968}
.repeat-copy>p{font-size:18px;margin:7px 0 12px}
.repeat-example{font-size:17px;font-weight:750;line-height:1.45}
.repeat-actions{display:flex;gap:8px;align-items:center;flex-wrap:nowrap;margin-top:12px}
.repeat-actions button{font:inherit;font-size:14px;min-height:46px;padding:10px 14px;white-space:nowrap}
.repeat-actions .play-self:disabled{opacity:.45;cursor:not-allowed}
.self-record-status{margin-top:10px;padding:9px 11px;border-radius:11px;background:#f0f8f5;color:#55756c;font-size:12px}
.lesson-q-vi{margin:6px 0 9px;padding:7px 9px;border-left:3px solid #66b9a5;background:#f3faf7;color:#607a72;font-size:12px;line-height:1.45}
@media(max-width:980px){.repeat-actions{flex-wrap:wrap}.repeat-actions button{flex:1 1 auto}}
@media(max-width:680px){.repeat-copy h3{font-size:32px}.repeat-actions{display:grid;grid-template-columns:1fr 1fr}.repeat-actions .primary{grid-column:1/-1}}

/* v2.1.7 · local Canva vocabulary assets */
.sgk-3d-visual.real{background:#eef8f4;padding:0}
.sgk-3d-visual.real img{display:block;width:100%;height:100%;object-fit:cover;object-position:center;border-radius:inherit}
.sgk-3d-visual.real.hero{width:240px;height:240px;box-shadow:0 10px 0 #d3e9e1,0 18px 28px rgba(31,84,70,.12)}
.sgk-3d-visual.real.small img,.sgk-3d-visual.real.choice img{object-fit:cover}
.lesson-q-vi{display:block!important}

/* v2.1.8 · full 52-image Canva vocabulary system */
.sgk-3d-visual.real{position:relative;overflow:hidden;background:#eef7f3}
.sgk-3d-visual.real img{position:relative!important;z-index:3!important;display:block!important;width:100%!important;height:100%!important;object-fit:cover!important;object-position:center!important;opacity:1!important;visibility:visible!important}
.sgk-3d-visual.real .visual-glow{z-index:4;opacity:.12;pointer-events:none}
.sgk-3d-visual.real.hero{width:240px;height:240px}
.visual-exercise{display:grid;grid-template-columns:190px minmax(0,1fr);column-gap:18px;align-items:center}
.visual-exercise>.sgk-3d-visual{grid-row:1/6}
.question-visual-card{position:relative;padding-left:106px!important;min-height:104px}
.question-visual-card>.sgk-3d-visual.choice{position:absolute;left:14px;top:14px;width:76px;height:76px}
.reading-feature{display:grid;grid-template-columns:180px minmax(0,1fr);gap:18px;align-items:center}
.reading-feature p{margin:0;line-height:1.75}
.writing-visuals{grid-column:1/-1;display:flex!important;gap:10px!important;align-items:center;margin-bottom:8px}
.writing-visuals .sgk-3d-visual{flex:0 0 auto}
.game-stage>.sgk-3d-visual.activity{width:180px;height:180px}
@media(max-width:720px){
 .visual-exercise{grid-template-columns:1fr}.visual-exercise>.sgk-3d-visual{grid-row:auto;margin:0 auto 12px}
 .question-visual-card{padding-left:14px!important;padding-top:100px!important}
 .question-visual-card>.sgk-3d-visual.choice{left:50%;transform:translateX(-50%)}
 .reading-feature{grid-template-columns:1fr}.reading-feature>.sgk-3d-visual{margin:auto}
}

/* v2.1.9 · pronunciation clean + all game modes illustrated except Look & Match */
.pronunciation-card{padding-left:16px!important;min-height:0}
.pronunciation-card>.sgk-3d-visual{display:none!important}
.activity-tile.visual-game{display:grid!important;grid-template-columns:84px minmax(0,1fr);gap:12px;align-items:center;text-align:left}
.activity-tile.visual-game>.sgk-3d-visual.choice{width:76px;height:76px;margin:0}
.activity-tile .activity-copy{display:grid;gap:3px;min-width:0}
.activity-tile.text-only-game{display:grid!important;place-items:center;text-align:center}
.match-no-image{display:grid;place-items:center;width:56px;height:56px;border-radius:16px;background:#eef5f2;font-size:27px;margin:auto}
@media(max-width:720px){
 .activity-tile.visual-game{grid-template-columns:68px minmax(0,1fr)}
 .activity-tile.visual-game>.sgk-3d-visual.choice{width:62px;height:62px}
}

/* v2.2.0 · Getting Started karaoke */
.karaoke-card{border:1px solid #cfe5dc;background:linear-gradient(145deg,#fff,#f8fcfa)}
.karaoke-controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.karaoke-controls button{min-height:42px}
.karaoke-speed{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin:12px 0 14px;padding:9px 11px;border-radius:12px;background:#f0f8f5;color:#55776d}
.karaoke-speed>span{font-size:12px;font-weight:800}
.karaoke-speed button{border:1px solid #cfe1db;background:#fff;color:#45665d;border-radius:999px;padding:6px 10px;font-weight:800;font-size:11px;cursor:pointer}
.karaoke-speed button.active{background:#176e5d;color:#fff;border-color:#176e5d}
.karaoke-speed small{margin-left:auto}
.karaoke-lines{gap:9px}
.karaoke-lines .dialogue-line{position:relative;transition:.22s ease;border:1px solid #dfebe7;background:#fff}
.karaoke-lines .dialogue-line.karaoke-active{border-color:#39a889;background:#effbf6;box-shadow:0 7px 18px rgba(39,132,106,.13);transform:translateX(3px)}
.karaoke-lines .dialogue-line.karaoke-active>b{color:#078066}
.karaoke-lines .dialogue-line.karaoke-done{background:#fbfdfc}
.karaoke-en{display:flex!important;flex-wrap:wrap;gap:.16em .22em;align-items:baseline}
.karaoke-word{display:inline-block;padding:1px 3px;border-radius:6px;transition:background .12s ease,color .12s ease,transform .12s ease}
.karaoke-word-active{background:#ffd96a;color:#183d35!important;transform:translateY(-1px);box-shadow:0 2px 0 rgba(174,123,0,.12)}
.karaoke-active small{color:#4f766b!important}
@media(max-width:720px){
 .karaoke-controls{width:100%}.karaoke-controls button{flex:1 1 auto}
 .karaoke-speed small{width:100%;margin-left:0}
 .karaoke-lines .dialogue-line.karaoke-active{transform:none}
}

/* v2.2.1 · compact smart game layout */
.sgk-3d-visual.game-thumb{width:104px;height:104px;min-width:104px;margin:0}
.sgk-3d-visual.smart-medium{width:160px;height:160px;min-width:160px;margin:0}
.sgk-3d-visual.repeat-smart{width:180px;height:180px;min-width:180px;margin:0}
.sgk-3d-visual.listen-choice-img{width:78px;height:78px;margin:0 auto 7px}
.game-visual-row{display:flex;align-items:center;gap:14px;margin:8px 0 12px;padding:10px 12px;border:1px solid #dce9e4;border-radius:16px;background:#f8fcfa}
.game-visual-copy{display:grid;gap:4px}.game-visual-copy small{color:#70857e;font-size:12px}.game-visual-copy b{font-size:17px;color:#214f43}
.smart-tip{margin:8px 0 10px!important}
.selectable-answer{min-height:58px;display:flex!important;align-items:center;gap:8px;flex-wrap:wrap;padding:9px 10px!important}
.answer-chip{border:1px solid #91c9ba;background:#e9f8f2;color:#174f43;border-radius:12px;padding:10px 13px;font-size:17px;font-weight:850;cursor:pointer;box-shadow:0 3px 0 #c9e7dd}
.answer-chip:hover{transform:translateY(-1px)}
.answer-chip::after{content:' ×';opacity:.45;font-size:12px}
.available-tiles button{transition:.12s ease}
.compact-actions{margin-top:10px!important}
.look-write-smart,.smart-game-card{display:grid;grid-template-columns:auto minmax(0,1fr);gap:18px;align-items:center}
.look-write-copy,.smart-game-copy{display:grid;gap:10px;min-width:0}
.inline-answer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center}
.listen-head-smart{display:flex;align-items:center;justify-content:center;gap:12px;margin:4px 0 14px}.listen-head-smart p{margin:6px 0 0}
.listen-card-grid{gap:10px!important}.listen-choice{padding:10px!important;min-height:128px!important}
.repeat-card.smart-repeat{grid-template-columns:200px minmax(0,1fr)!important;gap:24px!important}
.repeat-card.smart-repeat .repeat-copy{min-width:0}
.game-stage{padding-top:12px!important}
@media(max-width:760px){
 .sgk-3d-visual.smart-medium{width:132px;height:132px;min-width:132px}
 .look-write-smart,.smart-game-card{grid-template-columns:1fr}.look-write-smart>.sgk-3d-visual,.smart-game-card>.sgk-3d-visual{margin:auto}
 .repeat-card.smart-repeat{grid-template-columns:1fr!important}.repeat-card.smart-repeat>.sgk-3d-visual{margin:auto}
 .inline-answer{grid-template-columns:1fr}
}


/* v2.2.1A · official SGK Getting Started audio */
.official-audio-wrap{display:grid;grid-template-columns:auto minmax(280px,1fr);align-items:center;gap:14px;margin:12px 0;padding:11px 13px;border:1px solid #cfe6dc;border-radius:14px;background:#f4fbf8}
.official-audio-wrap b{font-size:13px;color:#246657;white-space:nowrap}
.official-audio-wrap audio{width:100%;height:40px}
@media(max-width:720px){.official-audio-wrap{grid-template-columns:1fr}}

/* v2.2.1B · lesson-scoped flow */
.lesson-scope-banner{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:14px 0 10px;padding:13px 15px;border:1px solid #cfe3dc;background:linear-gradient(135deg,#f7fbf9,#eef8f4);border-radius:16px}
.lesson-scope-banner>div:first-child{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.lesson-scope-banner b{font-size:16px;color:#17483d}
.lesson-scope-banner small{display:block;color:#6b7f78;flex-basis:100%;margin-left:0}
.scope-route{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}
.scope-route span{padding:6px 9px;border-radius:999px;background:#fff;border:1px solid #d8e8e2;font-size:12px;font-weight:800;color:#315c51}
.tabs button.lesson-focus{border-color:#1a8f7f;box-shadow:inset 0 0 0 1px #1a8f7f;background:#eefaf6}
.tabs button.lesson-muted{opacity:.58}
.tabs button.lesson-muted:hover{opacity:.85}
.lesson-map .unit-review-btn{border-style:dashed;background:#fbfffd}
.lesson-map .unit-review-btn.active{border-style:solid;background:#eaf8f3;border-color:#149281;box-shadow:0 7px 0 #c9e8df}
.lesson-scope-notice{display:flex;flex-direction:column;gap:7px;padding:18px;border:1px dashed #bfd8d0;background:#f7fbf9;border-radius:16px;color:#3b5f56}
.lesson-scope-notice b{font-size:16px;color:#1c5548}
.scope-mini-badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#eaf7f2;color:#176b5e;font-weight:900;font-size:12px}
button:disabled{cursor:not-allowed;opacity:.48}
@media(max-width:760px){
 .lesson-scope-banner{align-items:flex-start;flex-direction:column}
 .scope-route{justify-content:flex-start}
 .tabs button.lesson-muted{opacity:.7}
}

/* v2.2.1B · student readability + minimal UI */
body{font-size:17px;line-height:1.55}
h1{font-size:34px;line-height:1.15}
h2{font-size:26px;line-height:1.22}
h3{font-size:22px;line-height:1.28}
h4{font-size:19px;line-height:1.35}
p,.sub{font-size:16px;line-height:1.55}
button,.primary,.secondary,.chip{font-size:16px;min-height:46px}
.card{border-radius:20px}
.catalog-card .catalog-head{align-items:center}
.catalog-card .catalog-head>.catalog-status{font-size:15px}
.catalog-notice{font-size:15px;padding:10px 12px}
.hero-main #unitHeroDesc{font-size:18px;margin:8px 0 0}
.lesson-map button{min-height:76px;padding:14px 16px}
.lesson-map button b{font-size:17px;line-height:1.3}
.lesson-map button small{font-size:14px;line-height:1.35;margin-top:5px}
.tabs button{font-size:17px;min-height:50px;padding:10px 16px;white-space:nowrap}
.lesson-source-badge{font-size:13px;opacity:.7}
.lesson-callout{font-size:17px;padding:12px 14px}
.lesson-task b{font-size:17px}
.lesson-task small{font-size:15px;line-height:1.45}
.lesson-scope-banner b{font-size:18px}
.lesson-scope-banner small{font-size:15px;line-height:1.45}
.scope-route span{font-size:13px}
.vocab-card b{font-size:20px}
.vocab-card em{font-size:15px}
.vocab-card small{font-size:15px;line-height:1.45}
.vocab-card .cat{font-size:12px}
.exercise .prompt{font-size:21px;line-height:1.45}
.input,textarea,select{font-size:17px}
.options button,.q-options label{font-size:17px;line-height:1.45}
.q-card h4{font-size:19px}
.q-card .q-vi{font-size:15px}
.dialogue-line b{font-size:17px}
.dialogue-line .karaoke-en,.dialogue-line>div>span{font-size:18px;line-height:1.5}
.dialogue-line small{font-size:16px;line-height:1.45}
.activity-tile b{font-size:17px}
.activity-tile small{font-size:14.5px;line-height:1.4}
.activity-tile strong{font-size:14px}
.game-top b{font-size:19px}
.game-top small{font-size:14px}
.game-stage .prompt{font-size:20px}
.result strong{font-size:26px}
.result span,.result small{font-size:14px}
.source{font-size:15px;line-height:1.45}
.lesson-source-head .sub{margin-top:5px}
.lesson-source-card .lesson-source-badge{white-space:nowrap}
@media(max-width:760px){
 body{font-size:16px}
 h1{font-size:29px}
 h2{font-size:23px}
 h3{font-size:20px}
 h4{font-size:18px}
 p,.sub{font-size:15px}
 button,.primary,.secondary,.chip{font-size:16px;min-height:48px}
 .lesson-map{grid-template-columns:1fr 1fr}
 .lesson-map button{min-height:82px;padding:13px}
 .lesson-map button b{font-size:16px}
 .lesson-map button small{font-size:13px}
 .tabs button{font-size:16px;min-height:50px}
 .lesson-source-head{gap:8px}
 .lesson-source-badge{display:none}
 .lesson-callout{font-size:16px}
 .lesson-task b{font-size:16px}
 .lesson-task small{font-size:14px}
 .vocab-card b{font-size:19px}
 .vocab-card small{font-size:14.5px}
 .exercise .prompt{font-size:19px}
 .q-card h4{font-size:18px}
 .dialogue-line .karaoke-en,.dialogue-line>div>span{font-size:17px}
 .dialogue-line small{font-size:15px}
}
@media(max-width:430px){
 .lesson-map{grid-template-columns:1fr}
 .catalog-card .sub,.catalog-notice{display:none}
 .hero-main #unitHeroDesc{font-size:17px}
}

/* v2.2.1B · bilingual question rule */
.bilingual-question,.lesson-q-vi{
  display:block!important;
  margin:7px 0 11px!important;
  padding:9px 12px!important;
  border-left:4px solid #75b7a6;
  border-radius:10px;
  background:#f2f8f5!important;
  color:#3e655b!important;
  font-size:16px!important;
  line-height:1.5!important;
  font-weight:650;
}
.lesson-q-vi{margin-top:6px!important}
.writing-prompt-bi{display:grid;gap:3px;padding:7px 0}
.writing-prompt-bi>div{font-size:17px;font-weight:750}
.writing-prompt-bi small{font-size:15px;color:#527268;line-height:1.45}
.listen-translation{display:inline-block;margin-top:5px;font-size:16px;line-height:1.5;color:inherit}
@media(max-width:760px){
 .bilingual-question,.lesson-q-vi{font-size:15.5px!important;padding:8px 10px!important}
 .writing-prompt-bi>div{font-size:16px}
 .writing-prompt-bi small{font-size:14.5px}
}

.lesson-map button{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left}
.lesson-enter{display:inline-flex;margin-top:8px;padding:6px 9px;border-radius:999px;background:#edf8f4;color:#176b5d;font-size:13px;font-weight:900}
.lesson-map button.active .lesson-enter{background:#0f7465;color:#fff}
.lesson-path-grid{display:grid!important;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:16px 0 8px}
.lesson-path-step{min-height:128px!important;padding:16px!important;border:1px solid #cee1db!important;border-radius:18px!important;background:#fff!important;display:grid!important;grid-template-columns:auto auto 1fr;grid-template-rows:auto 1fr auto;gap:8px 10px;text-align:left!important;align-items:start;box-shadow:0 5px 16px rgba(20,72,61,.05)}
.lesson-path-step:hover{transform:translateY(-1px);border-color:#58ae99!important;box-shadow:0 8px 22px rgba(20,72,61,.10)}
.lesson-path-no{grid-row:1/3;display:flex;width:32px;height:32px;border-radius:50%;align-items:center;justify-content:center;background:#0f7566;color:#fff;font-size:15px;font-weight:950}
.lesson-path-icon{font-size:25px;line-height:1}
.lesson-path-copy{grid-column:2/4;display:grid;gap:4px}
.lesson-path-copy b{font-size:18px;color:#164b40}
.lesson-path-copy small{font-size:14.5px;line-height:1.4;color:#668078}
.lesson-path-go{grid-column:2/4;align-self:end;font-size:14px;font-weight:900;color:#0e7566}
.lesson-route{display:none!important}
/* SGK v2.3.59: lesson focus must never remove the function navigation. */
.sgk-lesson-home #mastery,.sgk-lesson-home #lessonScopeBanner{display:none!important}
#tabs.tabs{display:flex!important;visibility:visible!important;opacity:1!important}
#tabs.tabs button[data-tab]:not([data-tab="teacher"]){display:inline-flex!important;visibility:visible!important}
.sgk-lesson-home [data-panel="lesson"]{margin-top:4px}.sgk-lesson-home .lesson-source-card{padding-top:22px}.sgk-lesson-home .lesson-source-badge{display:none}.sgk-lesson-home .lesson-callout{margin-top:10px}.sgk-lesson-home #lessonPracticeBox{display:none!important}
.lesson-scope-banner{padding:10px 13px;margin:8px 0}.lesson-scope-banner small{font-size:14px}
@media(max-width:1000px){.lesson-path-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.lesson-path-grid{grid-template-columns:1fr;gap:10px}.lesson-path-step{min-height:104px!important}.lesson-map .lesson-enter{font-size:12.5px}.sgk-lesson-home .lesson-callout{font-size:15px}}

/* content audit fixes */
#pronunciationCard[hidden]{display:none!important}


/* v2.2.2 · compact visual activity cards + Skills 2 listening */
.activity-tile.visual-game{
  display:grid;
  grid-template-columns:76px minmax(0,1fr);
  gap:11px;
  align-items:center;
  min-height:104px;
  padding:12px 13px;
}
.activity-tile.visual-game>.sgk-3d-visual.choice{
  width:72px;
  height:72px;
  min-width:72px;
  margin:0;
  border-radius:17px;
  box-shadow:0 5px 0 #d3e9e1,0 9px 16px rgba(31,84,70,.09);
}
.activity-tile.visual-game .activity-copy{
  min-width:0;
  display:grid;
  gap:3px;
  align-content:center;
}
.activity-tile.visual-game .activity-copy>.ico{display:none}
.activity-tile.visual-game .activity-copy b{
  font-size:14px;
  line-height:1.25;
  overflow-wrap:anywhere;
}
.activity-tile.visual-game .activity-copy small{
  font-size:10.5px;
  line-height:1.35;
  margin:0;
}
.activity-tile.visual-game .activity-copy strong{
  position:static;
  justify-self:start;
  margin-top:3px;
  padding:3px 7px;
}
.activity-tile.text-only-game{
  display:grid;
  align-content:center;
  min-height:104px;
}
[data-panel="listening"] .audio-bar button{min-height:40px}
[data-panel="listening"] .question-visual-card{
  display:grid;
  grid-template-columns:82px minmax(0,1fr);
  column-gap:12px;
  align-items:start;
}
[data-panel="listening"] .question-visual-card>.sgk-3d-visual{
  grid-row:1 / span 4;
  margin-top:2px;
}
[data-panel="listening"] .question-visual-card>.meta,
[data-panel="listening"] .question-visual-card>h4,
[data-panel="listening"] .question-visual-card>.q-vi,
[data-panel="listening"] .question-visual-card>.q-options,
[data-panel="listening"] .question-visual-card>.input{
  grid-column:2;
}
@media(max-width:560px){
  .activity-tile.visual-game{
    grid-template-columns:64px minmax(0,1fr);
    gap:9px;
    padding:10px 11px;
  }
  .activity-tile.visual-game>.sgk-3d-visual.choice{
    width:60px;
    height:60px;
    min-width:60px;
  }
  [data-panel="listening"] .question-visual-card{
    grid-template-columns:64px minmax(0,1fr);
    column-gap:9px;
  }
  [data-panel="listening"] .question-visual-card>.sgk-3d-visual{
    width:60px;
    height:60px;
    min-width:60px;
  }
}


/* v2.2.5 · karaoke visibility + bilingual examples + repeatable attempts */
.karaoke-word-done{color:#2c6658!important}
.karaoke-lines .dialogue-line.karaoke-done .karaoke-en{opacity:.78}
.karaoke-lines .dialogue-line.karaoke-active .karaoke-en{font-weight:850}
.karaoke-lines .dialogue-line.karaoke-active .karaoke-word-active{
  background:#ffcf3f!important;
  color:#123d33!important;
  outline:2px solid rgba(207,143,0,.18);
  transform:translateY(-1px) scale(1.04);
}
.repeat-example-vi{
  margin-top:7px;
  padding:9px 12px;
  border-left:4px solid #75b7a6;
  border-radius:10px;
  background:#f2f8f5;
  color:#4b6c63;
  font-size:15px;
  line-height:1.5;
}
.attempt-tools{
  display:flex;
  justify-content:flex-end;
  gap:8px;
  margin:8px 0 14px;
  flex-wrap:wrap;
}
.attempt-tools .secondary,[data-new-attempt]{
  min-height:40px!important;
  padding:8px 12px!important;
  font-size:14px!important;
}
.skills1-recap{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
  margin:8px 0 14px;
}
.recap-card{
  padding:16px;
  border:1px solid #d9e8e3;
  border-radius:17px;
  background:#fbfefd;
}
.recap-card b{display:block;font-size:17px;color:#174f43;margin-bottom:7px}
.recap-card p{margin:0 0 7px;font-size:15.5px}
.recap-card small{display:block;color:#56736b;font-size:14px;line-height:1.5}
.project-recap{display:grid;gap:13px}
.project-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.project-grid>div{padding:13px 14px;border:1px solid #d9e8e3;border-radius:15px;background:#fbfefd}
.project-grid b{display:block;color:#174f43;margin-bottom:5px}
.project-grid small{display:block;font-size:14px;line-height:1.5;color:#58736b}
.project-frame{padding:14px 16px;border-radius:15px;background:#eef8f4;border:1px solid #cfe3dc;font-size:16px;line-height:1.55}
@media(max-width:760px){
  .skills1-recap{grid-template-columns:1fr}
  .project-grid{grid-template-columns:1fr}
  .attempt-tools{justify-content:stretch}
  .attempt-tools .secondary,[data-new-attempt]{width:100%}
  .repeat-example-vi{font-size:14.5px}
}


/* v2.2.6 · tap English word to hear pronunciation in Look & Match */
.match-left{
  position:relative;
  display:grid!important;
  grid-template-columns:auto minmax(0,1fr);
  align-items:center;
  gap:10px;
}
.match-left .match-audio-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;
  height:32px;
  border-radius:999px;
  background:#e7f6f1;
  font-size:16px;
  transition:transform .15s ease,background .15s ease;
}
.match-left b{grid-column:2;text-align:center}
.match-left::after{content:none!important;display:none!important}
.match-left.speaking .match-audio-icon{
  transform:scale(1.14);
  background:#c9efe3;
}
.match-left.speaking{
  box-shadow:0 0 0 3px rgba(22,143,122,.12),0 6px 0 #d8ebe5!important;
}
.match-left.matched{opacity:.72}
.match-left.matched .match-audio-icon{opacity:1}
@media(max-width:620px){
  .match-left{grid-template-columns:auto minmax(0,1fr);gap:8px}
  .match-left::after{display:none}
  .match-left .match-audio-icon{width:30px;height:30px;font-size:15px}
}


/* v2.2.7 · real flag images + bilingual color system + lesson states */
:root{
  --sgk-en:#174a82;
  --sgk-en-soft:#eef5fc;
  --sgk-vi:#0a7764;
  --sgk-vi-soft:#eef8f5;
  --sgk-flag-uk:url('/assets/sgk/shared/flag-uk.svg');
  --sgk-flag-vn:url('/assets/sgk/shared/flag-vn.svg');
  --current-lesson:#168b78;
}
.vocab-copy{display:grid;gap:5px;min-width:0}
.vocab-en,.vocab-example,.repeat-copy h3,.repeat-example,.circle-sentence,.tick-statement,
.lesson-practice-q>b,.q-card h4,.exercise .prompt,.karaoke-en,.recap-card p,
.writing-prompt-bi>div,.project-en,.reading-feature p,.listen-choice b,.match-left b{
  color:var(--sgk-en)!important;
}
.vocab-vi,.vocab-example-vi,.repeat-copy>p,.repeat-example-vi,.q-vi,.bilingual-question,
.dialogue-line small,.recap-card small,.writing-prompt-bi small,.project-vi,
.listen-translation,.game-visual-copy b,.match-right b,.reading-vi,.answer-hint span{
  color:var(--sgk-vi)!important;
}
.vocab-en,.vocab-example,.vocab-vi,.vocab-example-vi,.repeat-example,.repeat-example-vi,
.circle-sentence,.tick-statement,.lesson-practice-q>b,.q-card h4,.exercise .prompt,
.karaoke-en,.dialogue-line small,.recap-card p,.recap-card small,.writing-prompt-bi>div,
.writing-prompt-bi small,.project-en,.project-vi,.reading-feature p,.listen-translation,
.game-visual-copy b,.match-left b,.match-right b,.answer-hint span{
  position:relative;
}
.vocab-en,.vocab-example,.repeat-example,.circle-sentence,.tick-statement,.lesson-practice-q>b,
.q-card h4,.exercise .prompt,.karaoke-en,.recap-card p,.writing-prompt-bi>div,.project-en,
.reading-feature p,.listen-translation.lang-en,.match-left b{
  display:flex;
  align-items:flex-start;
  gap:8px;
}
.vocab-vi,.vocab-example-vi,.repeat-example-vi,.q-vi,.bilingual-question,.dialogue-line small,
.recap-card small,.writing-prompt-bi small,.project-vi,.listen-translation,.game-visual-copy b,
.match-right b,.answer-hint span{
  display:flex;
  align-items:flex-start;
  gap:8px;
}
.vocab-en::before,.vocab-example::before,.repeat-example::before,.circle-sentence::before,
.tick-statement::before,.lesson-practice-q>b::before,.q-card h4::before,.exercise .prompt::before,
.karaoke-en::before,.recap-card p::before,.writing-prompt-bi>div::before,.project-en::before,
.reading-feature p::before,.match-left b::before{
  content:'';
  width:22px;height:14px;min-width:22px;margin-top:.28em;
  border-radius:2px;background-image:var(--sgk-flag-uk);background-size:cover;background-position:center;
  box-shadow:0 0 0 1px rgba(10,35,60,.14);
}
.vocab-vi::before,.vocab-example-vi::before,.repeat-example-vi::before,.q-vi::before,
.bilingual-question::before,.dialogue-line small::before,.recap-card small::before,
.writing-prompt-bi small::before,.project-vi::before,.listen-translation::before,
.game-visual-copy b::before,.match-right b::before,.answer-hint span::before{
  content:'';
  width:22px;height:14px;min-width:22px;margin-top:.28em;
  border-radius:2px;background-image:var(--sgk-flag-vn);background-size:cover;background-position:center;
  box-shadow:0 0 0 1px rgba(80,20,15,.12);
}
.repeat-copy>p{font-weight:700}
.vocab-example,.vocab-example-vi{font-size:14px;line-height:1.45}
.vocab-example{padding-top:3px}
.answer-hint{
  display:grid;gap:7px;padding:11px 13px;border:1px dashed #b8d8cf;border-radius:13px;
  background:#f7fbf9;
}
.answer-hint>b{font-size:13px;color:#4f6f66;text-transform:uppercase;letter-spacing:.02em}
.answer-hint span{font-size:15px;line-height:1.5}
.project-en,.project-vi{display:flex!important;gap:8px;line-height:1.48;margin-top:6px;font-size:14px}
.project-grid small{display:none!important}

/* Unit visual: local Unit 1 illustration. Not labelled as publisher-original artwork. */
.hero-main{position:relative;overflow:hidden;padding-right:330px!important;min-height:250px}
.unit-hero-visual{position:absolute;right:22px;top:22px;width:280px}
.unit-hero-visual img{display:block;width:100%;height:170px;object-fit:cover;border-radius:18px;border:1px solid #d7e7e1;box-shadow:0 10px 28px rgba(30,76,65,.10)}
.unit-hero-visual small{display:block;margin-top:7px;text-align:center;color:#71847e;font-size:12px}
@media(max-width:900px){
  .hero-main{padding-right:230px!important}
  .unit-hero-visual{width:190px}
  .unit-hero-visual img{height:135px}
}
@media(max-width:700px){
  .hero-main{padding-right:20px!important}
  .unit-hero-visual{position:static;width:100%;margin-top:15px}
  .unit-hero-visual img{height:170px}
}

/* Lesson identity: unique accent + progress status */
.lesson-map button[data-lesson]{
  --lesson-accent:#168b78;--lesson-soft:#eef8f5;
  position:relative;overflow:hidden;border-left:6px solid var(--lesson-accent)!important;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease;
}
.lesson-map button.lesson-theme-1{--lesson-accent:#138d78;--lesson-soft:#eaf8f4}
.lesson-map button.lesson-theme-2{--lesson-accent:#3278c7;--lesson-soft:#edf5ff}
.lesson-map button.lesson-theme-3{--lesson-accent:#7656c8;--lesson-soft:#f3efff}
.lesson-map button.lesson-theme-4{--lesson-accent:#d27a24;--lesson-soft:#fff4e8}
.lesson-map button.lesson-theme-5{--lesson-accent:#46934a;--lesson-soft:#eef8ee}
.lesson-map button.lesson-theme-6{--lesson-accent:#c49a16;--lesson-soft:#fff9df}
.lesson-map button.lesson-theme-7{--lesson-accent:#b45586;--lesson-soft:#fff0f7}
.lesson-map button.lesson-status-current{
  background:linear-gradient(135deg,var(--lesson-soft),#fff)!important;
  border-color:var(--lesson-accent)!important;
  box-shadow:0 8px 0 color-mix(in srgb,var(--lesson-accent) 18%,#fff),0 14px 30px rgba(25,73,61,.10)!important;
  transform:translateY(-2px);
}
.lesson-map button.lesson-status-done{
  background:linear-gradient(135deg,#eef9f0,#fff)!important;
}
.lesson-map button.lesson-status-upcoming{
  background:linear-gradient(135deg,#f6f8f8,#fff)!important;
  opacity:.82;
}
.lesson-state{
  display:inline-flex;align-items:center;width:max-content;margin-top:8px;padding:4px 9px;border-radius:999px;
  font-size:12px;font-weight:900;letter-spacing:.01em;
}
.lesson-status-current .lesson-state{background:var(--lesson-accent);color:#fff}
.lesson-status-done .lesson-state{background:#dff3e3;color:#26733a}
.lesson-status-upcoming .lesson-state{background:#edf0f0;color:#76817d}
.lesson-status-current .lesson-enter{color:var(--lesson-accent)!important}
.lesson-map button[data-lesson]:hover{opacity:1;transform:translateY(-2px)}

/* Current lesson theme also appears inside the active lesson workspace. */
body[data-sgk-lesson-theme="1"]{--current-lesson:#138d78}
body[data-sgk-lesson-theme="2"]{--current-lesson:#3278c7}
body[data-sgk-lesson-theme="3"]{--current-lesson:#7656c8}
body[data-sgk-lesson-theme="4"]{--current-lesson:#d27a24}
body[data-sgk-lesson-theme="5"]{--current-lesson:#46934a}
body[data-sgk-lesson-theme="6"]{--current-lesson:#c49a16}
body[data-sgk-lesson-theme="7"]{--current-lesson:#b45586}
body[data-sgk-lesson-theme="unit"]{--current-lesson:#168b78}
.lesson-source-card-inline{border-top:5px solid var(--current-lesson)!important}
.lesson-scope-banner{border-left:5px solid var(--current-lesson)!important}
.lesson-source-badge{background:color-mix(in srgb,var(--current-lesson) 12%,#fff)!important;color:var(--current-lesson)!important}

@media(max-width:620px){
  .lesson-state{font-size:11px;padding:4px 8px}
  .vocab-en::before,.vocab-example::before,.repeat-example::before,.circle-sentence::before,
  .tick-statement::before,.lesson-practice-q>b::before,.q-card h4::before,.exercise .prompt::before,
  .karaoke-en::before,.recap-card p::before,.writing-prompt-bi>div::before,.project-en::before,
  .reading-feature p::before,.match-left b::before,
  .vocab-vi::before,.vocab-example-vi::before,.repeat-example-vi::before,.q-vi::before,
  .bilingual-question::before,.dialogue-line small::before,.recap-card small::before,
  .writing-prompt-bi small::before,.project-vi::before,.listen-translation::before,
  .game-visual-copy b::before,.match-right b::before,.answer-hint span::before{
    width:20px;height:13px;min-width:20px;
  }
}


/* v2.2.7A · finish language markers on remaining bilingual surfaces */
.repeat-copy h3,.repeat-copy>p,.dialogue-line>div>span:not(.karaoke-en){
  display:flex;align-items:flex-start;gap:8px;
}
.repeat-copy h3,.dialogue-line>div>span:not(.karaoke-en){color:var(--sgk-en)!important}
.repeat-copy>p{color:var(--sgk-vi)!important}
.repeat-copy h3::before,.dialogue-line>div>span:not(.karaoke-en)::before{
  content:'';
  width:22px;height:14px;min-width:22px;margin-top:.28em;border-radius:2px;
  background-image:var(--sgk-flag-uk);background-size:cover;background-position:center;
  box-shadow:0 0 0 1px rgba(10,35,60,.14);
}
.repeat-copy>p::before{
  content:'';
  width:22px;height:14px;min-width:22px;margin-top:.28em;border-radius:2px;
  background-image:var(--sgk-flag-vn);background-size:cover;background-position:center;
  box-shadow:0 0 0 1px rgba(80,20,15,.12);
}
.lesson-map button.lesson-status-current{
  box-shadow:0 8px 0 #dcece7,0 14px 30px rgba(25,73,61,.10)!important;
}
.lesson-source-badge{background:#f2f7f5!important}
@media(max-width:620px){
  .repeat-copy h3::before,.dialogue-line>div>span:not(.karaoke-en)::before,.repeat-copy>p::before{
    width:20px;height:13px;min-width:20px;
  }
}


@keyframes sgkLessonBlocked{
  0%,100%{transform:translateX(0)}
  25%{transform:translateX(-5px)}
  50%{transform:translateX(5px)}
  75%{transform:translateX(-3px)}
}
.lesson-map button.lesson-blocked{animation:sgkLessonBlocked .42s ease;border-color:#d59670!important}


/* v2.2.9 · compact vocabulary cards + word/sentence audio */
.vocab-card{
  grid-template-columns:68px minmax(0,1fr) auto!important;
  gap:12px!important;
  align-items:center!important;
}
.vocab-copy{gap:4px!important}
.vocab-card .cat{display:none!important}
.vocab-en{font-size:20px;font-weight:850}
.vocab-vi{font-size:16px;font-weight:700}
.vocab-example,.vocab-example-vi{font-size:15px!important;line-height:1.45}
.vocab-audio-actions{
  display:grid;
  gap:7px;
  align-self:center;
}
.vocab-audio-actions .sound{
  width:auto!important;
  min-width:70px;
  height:38px!important;
  padding:0 10px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  font-size:13px;
  font-weight:850;
  color:#315d52;
  background:#fff;
}
.vocab-audio-actions .sound:hover{
  border-color:#77b7a8;
  background:#f1f8f5;
}
.vocab-audio-actions .sound:active{transform:translateY(1px)}
.vocab-audio-actions .sound-sentence{background:#f8fbff}
#vocabVoiceLabel{font-size:12px!important}
#vocabPanelDesc{margin-bottom:0}
.unit-hero-visual small{display:none!important}

@media(max-width:760px){
  .vocab-card{grid-template-columns:62px minmax(0,1fr)!important}
  .vocab-audio-actions{
    grid-column:2;
    grid-template-columns:repeat(2,minmax(0,1fr));
    width:100%;
    margin-top:3px;
  }
  .vocab-audio-actions .sound{min-width:0;width:100%!important}
}
@media(max-width:430px){
  .vocab-card{grid-template-columns:54px minmax(0,1fr)!important;padding:11px!important}
  .vocab-audio-actions{grid-column:1/-1}
  .vocab-example,.vocab-example-vi{font-size:14px!important}
}


/* v2.2.10 · reliable sentence audio interaction */
.vocab-sentence-tap{
  appearance:none;
  -webkit-appearance:none;
  border:0;
  background:transparent;
  padding:0;
  margin:0;
  width:100%;
  text-align:left;
  font:inherit;
  cursor:pointer;
  display:flex!important;
  align-items:flex-start;
  gap:8px;
  color:var(--sgk-en)!important;
}
.vocab-sentence-tap:hover{
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.vocab-sentence-tap:focus-visible{
  outline:2px solid #66aa9a;
  outline-offset:4px;
  border-radius:6px;
}
.vocab-sentence-tap::before{
  content:'';
  width:22px;height:14px;min-width:22px;margin-top:.28em;
  border-radius:2px;background-image:var(--sgk-flag-uk);background-size:cover;background-position:center;
  box-shadow:0 0 0 1px rgba(10,35,60,.14);
}
.sentence-listen-icon{
  margin-left:auto;
  min-width:24px;
  opacity:.72;
  font-size:14px;
}
.vocab-sentence-tap.speaking,
.sound-sentence.speaking{
  background:#edf7ff!important;
  box-shadow:0 0 0 2px rgba(50,120,199,.12);
}
.vocab-sentence-tap.speaking .sentence-listen-icon{opacity:1}
.sound-sentence.speaking{border-color:#7caedf!important}
@media(max-width:620px){
  .vocab-sentence-tap::before{width:20px;height:13px;min-width:20px}
}


/* v2.2.13 · sentence audio only from the Câu control */
.vocab-example{
  cursor:default!important;
  text-decoration:none!important;
}
.vocab-audio-actions{
  grid-template-columns:repeat(2,minmax(68px,1fr))!important;
  min-width:146px;
}
.vocab-audio-actions .sound-word,
.vocab-audio-actions .sound-sentence{
  min-width:68px!important;
}
.sound-sentence{
  background:#f4f8ff!important;
  border-color:#ccdaee!important;
}
.sound-sentence:hover{
  background:#edf4ff!important;
  border-color:#86a9d5!important;
}
@media(max-width:760px){
  .vocab-audio-actions{
    min-width:0;
    width:100%;
  }
}


/* v2.2.16 · single audio player feedback */
.vocab-audio-actions .sound.loading,
.match-left.loading{
  opacity:.72;
  cursor:progress;
}
.vocab-audio-actions .sound.loading::after{
  content:'';
  width:10px;height:10px;border:2px solid currentColor;border-right-color:transparent;
  border-radius:50%;display:inline-block;animation:sgkAudioSpin .65s linear infinite;
}
@keyframes sgkAudioSpin{to{transform:rotate(360deg)}}
.vocab-audio-actions .sound.speaking{
  background:#edf8f4!important;
  border-color:#70b6a5!important;
  box-shadow:0 0 0 2px rgba(73,184,166,.12);
}


/* v2.2.21 · Vocabulary audio UI mirrors English/Chinese communication */
.vocab-term-audio-row,
.vocab-example-audio-row{
  display:flex;
  align-items:flex-start;
  gap:10px;
}
.vocab-term-audio-row .vocab-en,
.vocab-example-audio-row>div{
  flex:1;
  min-width:0;
}
.vocab-icon-listen{
  flex:0 0 auto;
  width:38px;
  height:38px;
  border:1px solid #cdded8;
  border-radius:12px;
  background:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  font-size:18px;
  line-height:1;
  box-shadow:0 2px 8px rgba(30,76,65,.06);
}
.vocab-icon-listen:hover{
  background:#f1f8f5;
  border-color:#79b6a8;
}
.vocab-icon-listen.ai-audio{
  position:relative;
  border-style:dashed;
  border-color:#b9a8e8;
}
.vocab-icon-listen.ai-audio::after{
  content:'AI';
  position:absolute;
  bottom:-5px;
  right:-5px;
  font-size:8px;
  font-weight:700;
  line-height:1.5;
  padding:0 3px;
  border-radius:6px;
  background:#f1edfb;
  color:#5b4b9e;
  border:1px solid #cfc3ee;
}
.vocab-icon-listen.loading{
  opacity:.62;
  cursor:progress;
}
.vocab-icon-listen.speaking{
  background:#eaf7f2;
  border-color:#63ad9a;
  box-shadow:0 0 0 3px rgba(73,184,166,.12);
}
.vocab-example-audio-row{
  margin-top:3px;
}
.vocab-example-audio-row .vocab-example-vi{
  margin-top:4px;
}
.vocab-audio-actions{
  display:none!important;
}
@media(max-width:620px){
  .vocab-icon-listen{
    width:36px;
    height:36px;
    border-radius:11px;
    font-size:17px;
  }
}


/* v2.2.23 · dedicated Lesson 2 pronunciation panel */
.pronunciation-guide-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
  margin:6px 0 18px;
}
.pronunciation-guide-card{
  border:1px solid #d8e7e2;
  border-radius:16px;
  padding:16px;
  background:linear-gradient(180deg,#fff,#f8fbfa);
}
.pronunciation-symbol{
  font-size:28px;
  font-weight:900;
  color:#155f54;
  margin-bottom:6px;
}
.pronunciation-guide-card p{
  margin:0 0 12px;
  color:#617a73;
  line-height:1.45;
}
.pronunciation-samples{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.pronunciation-samples button{
  border:1px solid #cfded9;
  border-radius:999px;
  background:#fff;
  padding:8px 11px;
  font-weight:800;
  color:#245d53;
  cursor:pointer;
}
.pronunciation-samples button:hover{
  background:#eef8f5;
  border-color:#7ab6a7;
}
.pronunciation-practice-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin:6px 0 12px;
  padding-top:14px;
  border-top:1px solid #e2ebe8;
}
.pronunciation-practice-title span{
  color:#73847f;
  font-size:14px;
}
@media(max-width:700px){
  .pronunciation-guide-grid{grid-template-columns:1fr}
  .pronunciation-practice-title{align-items:flex-start;flex-direction:column;gap:4px}
}


/* v2.2.25 · Unit 1 template freeze */
.mastery{grid-template-columns:repeat(7,minmax(0,1fr))}
@media(max-width:1100px){.mastery{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:760px){.mastery{grid-template-columns:repeat(2,minmax(0,1fr))}}


/* v2.3.0 · Grade 6 Unit 2 · My House */
.unit-hero-caption{
  margin-top:9px;
  text-align:center;
  color:#6d817a;
  font-size:12px;
}
body[data-sgk-unit="2"] .mastery{
  grid-template-columns:repeat(6,minmax(0,1fr));
}
body[data-sgk-unit="2"] .hero-main{
  background:linear-gradient(145deg,#fff,#fbfffd);
}
body[data-sgk-unit="2"] .unit-hero-visual{
  background:linear-gradient(145deg,#f2fbf8,#fff9ed);
}
.unit2-dialogue .lesson-dialogue-head small{
  display:block;
  margin-top:5px;
  color:#72847d;
  font-size:12px;
}
@media(max-width:1100px){
  body[data-sgk-unit="2"] .mastery{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:760px){
  body[data-sgk-unit="2"] .mastery{grid-template-columns:repeat(2,minmax(0,1fr))}
}


/* v2.3.18 · Unit 2 Communication guided TTS */
.unit2-communication-guided .communication-fallback-note{display:grid;gap:4px;padding:11px 13px;border-radius:13px;background:#fff8ea;border:1px solid #eadba9;color:#695a34}
.unit2-communication-guided .communication-fallback-note b{color:#6c5314}
.unit2-communication-guided .communication-fallback-note span{font-size:11px;line-height:1.45;color:#776c52}
.communication-guided-lines .unit2-comm-line{grid-template-columns:70px minmax(0,1fr) auto;align-items:center;transition:.18s ease}
.communication-guided-lines .unit2-comm-line.communication-active{border-color:#59b6a3;background:#ebf9f4;box-shadow:0 0 0 2px rgba(48,158,133,.10)}
.communication-guided-lines .unit2-comm-line.communication-done{background:#f8fbfa}
.communication-guided-lines .unit2-comm-line.communication-done>div>span{color:#5c746d}
.communication-line-play{min-height:38px;padding:8px 10px!important;font-size:11px!important;white-space:nowrap}
@media(max-width:680px){
 .unit2-communication-guided .karaoke-controls{display:grid;grid-template-columns:1fr 1fr;width:100%}
 .unit2-communication-guided .karaoke-controls .primary{grid-column:1/-1}
 .communication-guided-lines .unit2-comm-line{grid-template-columns:1fr}
 .communication-line-play{width:100%;margin-top:4px}
 .unit2-communication-guided .karaoke-speed{align-items:flex-start}
}


/* v2.3.26 · Unit 3 source audio alignment */
.unit3-source-audio-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;width:100%;min-width:0}
.unit3-source-audio-grid .official-audio-wrap{display:grid;grid-template-columns:1fr;gap:8px;align-content:start;min-width:0;margin:0;padding:12px 14px}
.unit3-source-audio-grid .official-audio-wrap b{white-space:normal;line-height:1.35}
.unit3-source-audio-grid audio{display:block;width:100%;max-width:100%;min-width:0;height:40px}
.pronunciation-guide-grid>.unit3-source-audio-grid{grid-column:1/-1}
.pronunciation-guide-grid>.pronunciation-source-pairs{grid-column:1/-1}
.pronunciation-guide-grid>.pronunciation-chant{grid-column:1/-1}
.source-word-chip{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:6px 10px;border:1px solid rgba(61,105,116,.18);border-radius:999px;background:#f5faf9;font-weight:700;color:#244f55}
.unit3-source-dialogue .dialogue-line{grid-template-columns:72px minmax(0,1fr)}
@media(max-width:680px){
 .unit3-source-audio-grid{grid-template-columns:1fr}
 .pronunciation-guide-grid>.unit3-source-audio-grid,
 .pronunciation-guide-grid>.pronunciation-source-pairs,
 .pronunciation-guide-grid>.pronunciation-chant{grid-column:auto}
 .unit3-source-dialogue .dialogue-line{grid-template-columns:1fr}
}


/* v2.3.37 · clarity-first UI redesign */
:root{
  --ui-bg:#f5f8f6;
  --ui-surface:#ffffff;
  --ui-surface-soft:#f7fbf9;
  --ui-ink:#173f36;
  --ui-muted:#657a73;
  --ui-line:#dbe7e2;
  --ui-green:#168978;
  --ui-green-dark:#164f44;
  --ui-ring:rgba(22,137,120,.18);
  --ui-shadow:0 8px 26px rgba(28,67,57,.065);
}
html{scroll-behavior:smooth}
body{
  background:linear-gradient(180deg,#f6faf8 0,#f3f7f5 38%,#f7faf8 100%);
  color:#29473f;
}
.shell{
  max-width:1240px;
  padding:18px 18px calc(76px + env(safe-area-inset-bottom,0px));
}
.ribbon{
  min-height:32px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:6px 12px;
  background:#16483f;
  box-shadow:0 1px 0 rgba(255,255,255,.08),0 5px 16px rgba(15,63,53,.09);
  font-size:11px;
}
.topbar{margin-bottom:12px}
.back{
  min-height:42px;
  padding:8px 13px;
  border-color:#d5e4df;
  border-radius:999px;
  background:#fff;
  box-shadow:none;
}
.pill{
  padding:6px 10px;
  background:#eaf6f2;
  color:#196859;
  font-size:11px;
  letter-spacing:.01em;
}
.card{
  border:1px solid var(--ui-line);
  border-radius:18px;
  background:var(--ui-surface);
  box-shadow:var(--ui-shadow);
}
.catalog-card{
  margin:14px 0 16px;
  padding:18px 20px;
  border-radius:20px;
  background:#fff;
  box-shadow:0 6px 22px rgba(29,72,60,.055);
}
.catalog-head{gap:14px}
.catalog-head h2{font-size:23px;margin:6px 0 4px}
.catalog-status{
  padding:11px 13px;
  border-radius:14px;
  box-shadow:none;
}
.catalog-notice{
  min-height:42px;
  padding:9px 12px;
  border-radius:12px;
}
.hero{gap:12px}
.hero-main{padding:22px 24px}
.hero h1{
  font-size:clamp(29px,3vw,38px);
  letter-spacing:-.02em;
  margin:6px 0 8px;
}
.hero-main #unitHeroDesc{font-size:16px;line-height:1.55}
.today{padding:18px 20px}
.today ul{margin:8px 0 0;line-height:1.6}
.source{margin-top:11px;padding:9px 11px;border-radius:11px}

.primary,.secondary,.chip,.back{
  transition:background .16s ease,border-color .16s ease,box-shadow .16s ease,transform .16s ease;
}
.primary{
  background:var(--ui-green);
  box-shadow:0 3px 9px rgba(22,137,120,.15);
}
.secondary{background:#f5faf8;border-color:#d3e4de}
button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{
  outline:3px solid var(--ui-ring);
  outline-offset:2px;
}
@media(hover:hover){
  .primary:hover,.secondary:hover,.back:hover{transform:translateY(-1px)}
  .primary:hover{background:#127867}
  .secondary:hover,.back:hover{background:#eef7f4;border-color:#9fc9bd}
}

.tabs{
  position:sticky;
  top:34px;
  z-index:45;
  display:flex;
  gap:6px;
  margin:0 0 14px;
  padding:7px;
  overflow-x:auto;
  overflow-y:hidden;
  scroll-snap-type:x proximity;
  scrollbar-width:none;
  border:1px solid rgba(213,228,222,.9);
  border-radius:16px;
  background:rgba(247,250,248,.94);
  box-shadow:0 5px 18px rgba(29,72,60,.055);
  backdrop-filter:blur(12px);
}
.tabs::-webkit-scrollbar{display:none}
.tabs button{
  scroll-snap-align:start;
  min-height:44px;
  padding:8px 13px;
  border:1px solid transparent;
  border-radius:11px;
  background:transparent;
  color:#45635b;
  font-size:15px;
  box-shadow:none;
}
.tabs button:not(.active):hover{background:#edf5f2;border-color:#e2ece8}
.tabs button.active{
  background:var(--ui-green-dark);
  border-color:var(--ui-green-dark);
  color:#fff;
  box-shadow:0 4px 11px rgba(22,79,68,.16);
}
.tabs button.lesson-focus{
  border-color:#8cc4b5;
  box-shadow:none;
  background:#f1faf7;
}
.tabs button.lesson-muted{opacity:.62}

.panel-card{
  margin-bottom:14px;
  padding:20px;
  border-radius:18px;
  box-shadow:0 5px 20px rgba(30,69,59,.045);
}
.panel-card>h3,
.section-head h3{
  letter-spacing:-.01em;
}
.section-head{
  align-items:center;
  gap:12px;
  margin-bottom:14px;
  padding-bottom:12px;
  border-bottom:1px solid #edf2f0;
}
.section-head h3{margin-bottom:3px}
.section-head p{margin:0}
.voice-tools{gap:7px}
.voice-tools>span{font-size:12px}
.filters{
  flex-wrap:nowrap;
  overflow-x:auto;
  scrollbar-width:none;
  padding-bottom:2px;
}
.filters::-webkit-scrollbar{display:none}
.filters button{
  flex:0 0 auto;
  min-height:40px;
  padding:7px 11px;
  font-size:13px;
  border-radius:11px;
}
.filters button.active{background:var(--ui-green-dark)}

.lesson-map{
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:8px;
}
.lesson-map button{
  min-height:78px;
  padding:12px 13px;
  border-radius:14px;
  border-color:#dce8e4;
  box-shadow:none;
  background:#fff;
}
.lesson-map button:hover{transform:translateY(-1px);box-shadow:0 5px 14px rgba(30,73,61,.06)}
.lesson-map button.active{
  border-color:#68ad9d!important;
  background:#eef8f4!important;
  box-shadow:inset 4px 0 0 #168978!important;
}
.lesson-map button b{font-size:15.5px}
.lesson-map button small{font-size:13px;margin-top:2px}
.lesson-enter{
  margin-top:auto;
  padding:4px 8px;
  font-size:12px;
}
.lesson-source-card{
  padding:18px 19px;
  border-radius:18px;
  background:#fff;
  box-shadow:0 5px 18px rgba(31,76,64,.04);
}
.lesson-source-head{gap:10px}
.lesson-source-head h2{margin:5px 0 3px}
.lesson-callout{
  margin:8px 0 12px;
  padding:10px 12px;
  border-radius:11px;
  font-size:15px;
}
.lesson-task-grid{
  grid-template-columns:repeat(auto-fit,minmax(255px,1fr));
  gap:8px;
  margin-top:11px;
}
.lesson-task{
  grid-template-columns:26px 31px 1fr;
  gap:7px;
  padding:10px 11px;
  border-radius:13px;
  background:#fbfdfc;
  box-shadow:none;
}
.lesson-task b{font-size:15.5px}
.lesson-task small{font-size:13.5px}
.lesson-path-grid{
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:9px;
  margin:13px 0 7px;
}
.lesson-path-step{
  min-height:108px!important;
  padding:13px!important;
  border-radius:15px!important;
  box-shadow:none!important;
}
.lesson-path-copy b{font-size:16px}
.lesson-path-copy small{font-size:13.5px}
.lesson-path-go{font-size:13px}

.mastery{
  grid-template-columns:repeat(auto-fit,minmax(112px,1fr));
  gap:7px;
  margin:12px 0 9px;
}
.master{padding:10px;border-radius:12px}
.master strong{font-size:21px}

.vocab-grid{
  grid-template-columns:repeat(auto-fit,minmax(350px,1fr));
  gap:9px;
}
.vocab-card{
  min-height:104px;
  padding:11px 12px;
  border:1px solid #dce8e4;
  border-bottom:1px solid #dce8e4;
  border-radius:15px;
  background:#fff;
  box-shadow:none;
  transform:none;
}
.vocab-card::after{display:none}
.vocab-card:hover{transform:translateY(-1px);box-shadow:0 5px 15px rgba(29,72,60,.06)}
.vocab-card b{font-size:18px}
.vocab-card em{font-size:14px}
.vocab-card small{font-size:13.5px}
.vocab-visual{
  box-shadow:inset 0 1px 0 #fff,0 4px 10px rgba(40,72,63,.10);
  transform:none;
}
.vocab-icon-listen{box-shadow:none}

.activity-grid{
  grid-template-columns:repeat(auto-fit,minmax(205px,1fr));
  gap:9px;
}
.activity-tile{
  min-height:104px;
  padding:13px;
  border:1px solid #dce7e3;
  border-bottom:1px solid #dce7e3;
  border-radius:15px;
  box-shadow:none;
  transform:none;
}
.activity-tile::before{display:none}
.activity-tile:hover{transform:translateY(-1px);box-shadow:0 5px 15px rgba(36,75,64,.065)}
.activity-tile .ico{font-size:27px;margin-bottom:5px;filter:none;transform:none}
.activity-tile b{font-size:15.5px}
.activity-tile small{font-size:13px;margin-top:3px}
.activity-tile strong{
  top:9px;right:9px;
  padding:3px 7px;
  font-size:12px;
  background:rgba(255,255,255,.86);
}

.vertical-questions{gap:9px}
.q-card,.lesson-practice-q{
  padding:13px 14px;
  border-radius:13px;
  background:#fff;
}
.q-card h4{font-size:17.5px;margin-bottom:6px}
.q-card .q-vi,
.bilingual-question,.lesson-q-vi{
  margin:6px 0 9px!important;
  padding:7px 9px!important;
  border-left-width:3px;
  border-radius:8px;
  font-size:14.5px!important;
  line-height:1.45!important;
  font-weight:600;
}
.q-options{
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:7px;
}
.q-options label{
  min-height:46px;
  padding:8px 10px;
  border-radius:10px;
  font-size:15px;
}
.q-options label:hover{border-color:#a8cfc4;background:#f7fbf9}
.options{gap:7px}
.options button{
  min-height:46px;
  border-radius:10px;
  font-size:15px;
}
.meta{font-size:11px}
.feedback{border-radius:9px}

.pronunciation-guide-grid{
  gap:10px;
  margin:4px 0 14px;
}
.pronunciation-guide-card{
  padding:14px 15px;
  border-radius:14px;
  background:#fbfdfc;
}
.pronunciation-symbol{font-size:26px;margin-bottom:4px}
.pronunciation-guide-card p{margin-bottom:9px;font-size:14px}
.pronunciation-samples{gap:6px}
.source-word-chip{
  min-height:32px;
  padding:5px 9px;
  font-size:14px;
  background:#fff;
}
.pronunciation-source-actions.unit3-source-audio-grid{gap:9px}
.unit3-source-audio-grid .official-audio-wrap{
  padding:10px 12px;
  border-radius:12px;
  background:#f7fbf9;
}
.unit3-source-audio-grid .official-audio-wrap b{
  font-size:13px;
  color:#205f53;
}
.unit3-source-audio-grid audio{height:38px}
.pronunciation-source-pairs,
.pronunciation-chant{
  margin:0!important;
  padding:11px 13px!important;
  border-radius:12px!important;
}
.pronunciation-practice-title{
  margin:4px 0 10px;
  padding-top:12px;
}

.reading-box,.reading-feature,.lesson-scope-notice{
  border-radius:13px;
}
.reading-feature{line-height:1.65}
.theory{border-radius:12px}
.theory summary{padding:12px 13px}
.formula,.example,.special,.error{border-radius:9px}
.input,textarea,select{
  border-radius:10px;
  border-color:#cfdfd9;
}
.input:focus,textarea:focus,select:focus{border-color:#6ab3a2}
.writing{min-height:160px}

.game-top{align-items:center}
.game-progress{height:7px;margin:8px 0 12px}
.game-stage{min-height:170px}
.match-card,.listen-choice,.tile-answer,.circle-sentence,.tick-statement{
  box-shadow:none;
}
.match-card{border-radius:13px}
.letter-tiles button,.sentence-tiles button,.word-bank button{
  box-shadow:none;
  border-radius:10px;
}
.repeat-card{gap:18px}
.repeat-example{margin:9px 0;border-radius:11px}
.game-finish{padding:20px 10px}

.results{grid-template-columns:repeat(auto-fit,minmax(145px,1fr))}
.result{border-radius:12px}
.recommend{border-radius:12px}

@media(max-width:900px){
  .shell{padding-left:14px;padding-right:14px}
  .catalog-head{grid-template-columns:1fr}
  .catalog-status{min-width:0}
  .lesson-map{grid-template-columns:repeat(3,minmax(0,1fr))}
  .q-options{grid-template-columns:1fr}
}
@media(max-width:700px){
  .shell{
    padding:10px 10px calc(64px + env(safe-area-inset-bottom,0px));
  }
  .ribbon{
    min-height:30px;
    padding-top:calc(5px + env(safe-area-inset-top,0px));
    font-size:10px;
  }
  .topbar{gap:8px;margin-bottom:9px}
  .topbar .pill{max-width:64vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .catalog-card{padding:14px;border-radius:16px;margin:10px 0 12px}
  .catalog-head h2{font-size:21px}
  .hero-main{padding:17px}
  .hero h1{font-size:28px}
  .today{padding:15px 17px}
  .tabs{
    top:30px;
    margin-bottom:10px;
    padding:6px;
    border-radius:14px;
  }
  .tabs button{
    min-height:44px;
    padding:8px 11px;
    font-size:14px;
    border-radius:10px;
  }
  .panel-card{padding:14px;border-radius:15px;margin-bottom:10px}
  .section-head{
    align-items:flex-start;
    margin-bottom:11px;
    padding-bottom:10px;
  }
  .voice-tools{
    width:100%;
    justify-content:flex-start;
    overflow-x:auto;
    flex-wrap:nowrap;
    scrollbar-width:none;
  }
  .voice-tools::-webkit-scrollbar{display:none}
  .voice-tools>*{flex:0 0 auto}
  .lesson-map{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
  .lesson-map button{min-height:82px;padding:10px 11px}
  .lesson-map button b{font-size:14.5px}
  .lesson-map button small{font-size:12.2px}
  .lesson-source-card{padding:14px}
  .lesson-source-head{grid-template-columns:1fr}
  .lesson-task-grid,.lesson-path-grid{grid-template-columns:1fr}
  .lesson-task b{font-size:15px}
  .lesson-task small{font-size:13px}
  .mastery{grid-template-columns:repeat(2,minmax(0,1fr))}
  .vocab-grid{grid-template-columns:1fr}
  .vocab-card{
    grid-template-columns:58px minmax(0,1fr) auto;
    min-height:94px;
    padding:10px;
  }
  .vocab-visual{width:54px;height:54px;border-radius:15px}
  .activity-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
  .activity-tile{min-height:100px;padding:11px}
  .activity-tile b{font-size:14.5px}
  .activity-tile small{font-size:12.5px}
  .q-card,.lesson-practice-q{padding:11px}
  .q-card h4{font-size:16.5px}
  .q-options{grid-template-columns:1fr}
  .q-options label{font-size:14.5px}
  .pronunciation-guide-grid{grid-template-columns:1fr;gap:8px}
  .unit3-source-audio-grid{grid-template-columns:1fr}
  .pronunciation-guide-grid>.unit3-source-audio-grid,
  .pronunciation-guide-grid>.pronunciation-source-pairs,
  .pronunciation-guide-grid>.pronunciation-chant{grid-column:auto}
  .official-audio-wrap{grid-template-columns:1fr}
  .unit3-source-audio-grid audio{height:38px}
  .repeat-card{padding:6px;gap:12px}
  .game-stage{min-height:150px}
}
@media(max-width:380px){
  .lesson-map,.activity-grid{grid-template-columns:1fr}
  .topbar{align-items:flex-start;flex-direction:column}
  .topbar .pill{max-width:100%}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}


/* v2.3.38 · color contrast polish */
:root{
  --ui-bg:#f8faf9;
  --ui-surface:#ffffff;
  --ui-surface-soft:#f6f9f7;
  --ui-ink:#173f36;
  --ui-muted:#566f68;
  --ui-line:#dce6e2;
  --ui-green:#147c6d;
  --ui-green-dark:#154f45;
  --ui-ring:rgba(20,124,109,.20);
}
body{
  background:#f8faf9;
  color:#29463f;
}
.ribbon{background:#15483f}
.card,.panel-card,.catalog-card,.lesson-source-card,.vocab-card,.q-card,.lesson-practice-q{
  background:#fff;
}
.hero-main{
  background:linear-gradient(180deg,#fff 0%,#fcfdfc 100%);
}
.tabs{
  background:rgba(250,252,251,.96);
  border-color:#dce6e2;
}
.tabs button{color:#3f5f57}
.tabs button.active{
  background:#154f45;
  border-color:#154f45;
  color:#fff;
}
.tabs button.lesson-focus{
  background:#f0f7f4;
  border-color:#83baac;
}
.primary{
  background:#147c6d;
  color:#fff;
}
.secondary{
  background:#f5f8f7;
  border-color:#d2e0db;
  color:#185f54;
}
.back{color:#24554b}
.pill{
  background:#edf6f2;
  color:#17695b;
}
.panel-card p,
.sub,
.hero p,
.today ul,
.lesson-task small,
.lesson-path-copy small,
.lesson-map button small,
.vocab-card small,
.activity-tile small,
.voice-tools>span,
.pronunciation-guide-card p,
.meta,
.result span,.result small,
.source{
  color:#566f68;
}
.lesson-map button.active{
  border-color:#6aa899!important;
  background:#f0f7f4!important;
  box-shadow:inset 4px 0 0 #147c6d!important;
}
.lesson-enter{
  background:#edf6f2;
  color:#17695b;
}
.lesson-map button.active .lesson-enter{
  background:#147c6d;
  color:#fff;
}
.lesson-callout,
.lesson-scope-notice,
.bilingual-question,.lesson-q-vi,
.q-card .q-vi{
  background:#f3f8f6!important;
}
.bilingual-question,.lesson-q-vi,
.q-card .q-vi{
  border-left-color:#6aa899;
  color:#3f6259!important;
}
.filters button{color:#4f6962}
.filters button.active{
  background:#154f45;
  border-color:#154f45;
  color:#fff;
}
.q-options label,
.options button{
  border-color:#dbe6e2;
  background:#fff;
  color:#29463f;
}
.q-options label:hover,
.options button:hover{
  border-color:#9fc8bd;
  background:#f7faf9;
}
.input,textarea,select{
  color:#29463f;
  background:#fff;
  border-color:#cadbd5;
}
.input:focus,textarea:focus,select:focus{
  border-color:#5fa493;
  box-shadow:0 0 0 3px rgba(20,124,109,.10);
}
.pronunciation-guide-card,
.unit3-source-audio-grid .official-audio-wrap{
  background:#f8faf9;
}
.source-word-chip{
  color:#244f47;
  border-color:#d6e3de;
}
@media(hover:hover){
  .primary:hover{background:#106f61}
}


/* v2.3.39 · visible palette hierarchy */
:root{
  --ui-bg:#edf3f0;
  --ui-surface:#ffffff;
  --ui-surface-soft:#f2f7f4;
  --ui-ink:#123c33;
  --ui-muted:#4f675f;
  --ui-line:#ceddd7;
  --ui-green:#0f7565;
  --ui-green-dark:#123f36;
  --ui-mint:#e5f2ed;
  --ui-ring:rgba(15,117,101,.22);
}
body{
  background:
    linear-gradient(180deg,#f3f7f5 0,#edf3f0 180px,#edf3f0 100%);
  color:#263f38;
}
.ribbon{
  background:#123f36;
  color:#fff;
}
.topbar .pill{
  background:#e1efe9;
  color:#145f52;
}
.card,
.panel-card,
.catalog-card,
.lesson-source-card,
.vocab-card,
.q-card,
.lesson-practice-q{
  border-color:#ceddd7;
  box-shadow:0 7px 20px rgba(29,67,57,.065);
}
.catalog-card{
  background:linear-gradient(135deg,#ffffff 0%,#f7fbf9 68%,#edf7f3 100%);
}
.catalog-status{
  background:#123f36;
}
.hero-main{
  background:linear-gradient(135deg,#ffffff 0%,#f8fbf9 100%);
}
.hero h1,
.section h2,
.panel-card h3,
.section-head h3,
.lesson-source-head h2,
.q-card h4,
.exercise .prompt,
.lesson-task b,
.lesson-path-copy b,
.vocab-card b,
.activity-tile b{
  color:#123c33;
}
.hero p,
.panel-card p,
.sub,
.today ul,
.lesson-task small,
.lesson-path-copy small,
.lesson-map button small,
.vocab-card small,
.activity-tile small,
.pronunciation-guide-card p,
.source,
.meta,
.voice-tools>span{
  color:#4f675f;
}
.tabs{
  background:#f7faf8;
  border-color:#cbdcd5;
  box-shadow:0 6px 18px rgba(28,67,57,.08);
}
.tabs button{
  background:#fff;
  border-color:#dbe6e2;
  color:#34584f;
}
.tabs button:not(.active):hover{
  background:#edf5f2;
  border-color:#a9cbbf;
}
.tabs button.active{
  background:#0f7565;
  border-color:#0f7565;
  color:#fff;
  box-shadow:0 4px 12px rgba(15,117,101,.20);
}
.tabs button.lesson-focus{
  background:#e7f3ee;
  border-color:#7fb7a7;
  color:#184f44;
}
.primary{
  background:#0f7565;
  color:#fff;
  box-shadow:0 4px 11px rgba(15,117,101,.18);
}
.secondary{
  background:#fff;
  border-color:#bfd5cd;
  color:#155d50;
}
.back{
  background:#fff;
  border-color:#c5d8d1;
  color:#204f45;
}
.section-head{
  border-bottom:2px solid #deebe6;
}
.lesson-map button{
  border-color:#d2e0db;
  background:#fff;
}
.lesson-map button.active{
  border-color:#5fa493!important;
  background:#e8f3ef!important;
  box-shadow:inset 5px 0 0 #0f7565!important;
}
.lesson-map button.active b{color:#0f6658}
.lesson-enter{
  background:#e6f1ed;
  color:#155f52;
}
.lesson-map button.active .lesson-enter{
  background:#0f7565;
  color:#fff;
}
.lesson-task{
  background:#f7faf8;
  border-color:#d8e4df;
}
.lesson-task-no{
  background:#dff0e9;
  color:#0d6758;
}
.lesson-callout,
.lesson-scope-notice{
  background:#edf6f2!important;
  border-color:#d4e6df!important;
  color:#355d53!important;
}
.bilingual-question,
.lesson-q-vi,
.q-card .q-vi{
  background:#edf6f2!important;
  border-left-color:#4f9d8a!important;
  color:#345e54!important;
}
.vocab-card{
  background:#fff;
}
.vocab-visual{
  background:linear-gradient(145deg,#fff9e8,#edf7f4);
  border-color:#d5e2dd;
}
.vocab-card em{color:#0d6d60}
.activity-tile{
  border-color:#d2dfda;
}
.q-options label,
.options button{
  border-color:#cfddd8;
  background:#fff;
  color:#263f38;
}
.q-options label:hover,
.options button:hover{
  background:#eff6f3;
  border-color:#8ebcaf;
}
.filters button{
  background:#fff;
  border-color:#d1dfda;
  color:#435f57;
}
.filters button.active{
  background:#0f7565;
  border-color:#0f7565;
  color:#fff;
}
.pronunciation-guide-card,
.unit3-source-audio-grid .official-audio-wrap{
  background:#f4f8f6;
  border-color:#cfdfd9;
}
.pronunciation-symbol{color:#0e6759}
.source-word-chip{
  background:#fff;
  color:#214e44;
  border-color:#cbdcd6;
}
.theory{
  background:#fff;
  border-color:#d0dfd9;
}
.theory summary{color:#173f36}
.formula{
  background:#edf6f2;
  border-left-color:#4e9e8b;
}
.example{background:#f7faf8}
.input,textarea,select{
  border-color:#bdcec8;
  color:#263f38;
}
.input:focus,textarea:focus,select:focus{
  border-color:#4f9d8a;
  box-shadow:0 0 0 3px rgba(15,117,101,.12);
}
.result,
.recommend{
  background:#f7faf8;
  border-color:#d2e0db;
}
@media(hover:hover){
  .primary:hover{background:#0c6658}
  .secondary:hover,.back:hover{
    background:#eef6f3;
    border-color:#8ebcaf;
  }
}


/* v2.3.40 · student-friendly harmonious palette */
:root{
  --student-bg:#f3f7f5;
  --student-card:#ffffff;
  --student-ink:#173f36;
  --student-muted:#526b63;
  --student-green:#157865;
  --student-green-dark:#16463d;
  --student-mint:#e9f5f0;
  --student-sky:#edf6fb;
  --student-butter:#fff8e8;
  --student-lilac:#f4f1fb;
  --student-peach:#fff2ec;
  --student-line:#d6e3de;
}
body{
  background:
    radial-gradient(circle at 8% 0%,rgba(232,245,239,.85),transparent 26%),
    linear-gradient(180deg,#f7faf8 0,#f3f7f5 190px,#f3f7f5 100%);
  color:#28433b;
}
.ribbon{
  background:#16463d;
}
.topbar .pill{
  background:#e8f3ee;
  color:#175f52;
}
.card,.panel-card,.catalog-card,.lesson-source-card{
  border-color:#d6e3de;
}
.catalog-card{
  background:linear-gradient(135deg,#ffffff 0%,#fbfdfc 60%,#edf7f3 100%);
}
.catalog-status{
  background:linear-gradient(145deg,#16463d,#1a5b4d);
}
.hero-main{
  background:linear-gradient(135deg,#ffffff 0%,#fbfdfc 100%);
}
.hero h1,
.section h2,
.panel-card h3,
.section-head h3,
.lesson-source-head h2{
  color:#173f36;
}
.hero p,
.panel-card p,
.sub,
.today ul,
.lesson-task small,
.lesson-path-copy small,
.lesson-map button small,
.vocab-card small,
.activity-tile small,
.pronunciation-guide-card p,
.source,
.meta,
.voice-tools>span{
  color:#526b63;
}

/* gentle semantic accents: visible enough for children, still calm */
.panel[data-panel="vocab"] .panel-card:first-child{border-top:4px solid #79bfa8}
.panel[data-panel="pronunciation"] .panel-card:first-child{border-top:4px solid #aaa1d8}
.panel[data-panel="grammar"] .panel-card:first-child{border-top:4px solid #dfbf69}
.panel[data-panel="practice"] .panel-card:first-child{border-top:4px solid #e3a590}
.panel[data-panel="listening"] .panel-card:first-child{border-top:4px solid #83b8d7}
.panel[data-panel="reading"] .panel-card:first-child{border-top:4px solid #8fa7d8}
.panel[data-panel="test"] .panel-card:first-child{border-top:4px solid #9ebf73}
.panel[data-panel="results"] .panel-card:first-child{border-top:4px solid #75b6a5}

.tabs{
  background:rgba(250,252,251,.97);
  border-color:#d3e1dc;
}
.tabs button{
  background:#fff;
  border-color:#dce7e3;
  color:#3d5d54;
}
.tabs button.active{
  background:#157865;
  border-color:#157865;
  color:#fff;
  box-shadow:0 4px 12px rgba(21,120,101,.18);
}
.tabs button.lesson-focus{
  background:#e9f5f0;
  border-color:#86baa9;
  color:#174f44;
}
.primary{
  background:#157865;
  box-shadow:0 4px 11px rgba(21,120,101,.16);
}
.secondary{
  background:#fff;
  border-color:#c8dcd5;
  color:#175f52;
}
.back{
  border-color:#cbdcd6;
  color:#234f46;
}

.lesson-map button{
  border-color:#d8e4df;
  background:#fff;
}
.lesson-map button.active{
  border-color:#65a996!important;
  background:#eaf5f0!important;
  box-shadow:inset 5px 0 0 #157865!important;
}
.lesson-map button.active b{color:#126756}
.lesson-enter{
  background:#eaf4f0;
  color:#185f52;
}
.lesson-map button.active .lesson-enter{
  background:#157865;
  color:#fff;
}
.lesson-task{
  background:#fbfdfc;
  border-color:#dae6e1;
}
.lesson-task-no{
  background:#e5f2ed;
  color:#126756;
}
.lesson-callout,
.lesson-scope-notice{
  background:#edf6f2!important;
  border-color:#d7e7e0!important;
  color:#355d53!important;
}

/* vocabulary: warm visual area, clean text area */
.vocab-card{
  background:#fff;
  border-color:#d8e4df;
}
.vocab-visual{
  background:linear-gradient(145deg,#fff8e8,#edf7f3);
  border-color:#d5e2dd;
}
.vocab-card em{color:#116d5e}
.vocab-card .cat{
  background:#ebf5f1;
  color:#2b685b;
}

/* activities: four soft pastel families, no harsh rainbow */
.activity-tile{
  border-color:#d7e3de;
  color:#27443c;
}
.activity-tile:nth-child(4n+1){
  background:linear-gradient(145deg,#f1f9f5,#ffffff);
  border-top:3px solid #8fc8b6;
}
.activity-tile:nth-child(4n+2){
  background:linear-gradient(145deg,#f0f7fb,#ffffff);
  border-top:3px solid #9dc6dd;
}
.activity-tile:nth-child(4n+3){
  background:linear-gradient(145deg,#fff9eb,#ffffff);
  border-top:3px solid #e6c978;
}
.activity-tile:nth-child(4n+4){
  background:linear-gradient(145deg,#f6f2fb,#ffffff);
  border-top:3px solid #b8addd;
}
.activity-tile strong{
  background:rgba(255,255,255,.92);
  color:#45645b;
}

/* questions: stronger reading rhythm */
.q-card,.lesson-practice-q{
  border-color:#d7e3de;
  background:#fff;
}
.q-card .meta{
  color:#60776f;
}
.bilingual-question,
.lesson-q-vi,
.q-card .q-vi{
  background:#eff6f3!important;
  border-left-color:#67a997!important;
  color:#375f55!important;
}
.q-options label,
.options button{
  border-color:#d4e1dc;
  background:#fff;
  color:#28433b;
}
.q-options label:hover,
.options button:hover{
  border-color:#90bdaf;
  background:#f4f9f7;
}
.options button.correct,
.q-options label.correct{
  background:#eaf7ef!important;
  border-color:#7ebb96!important;
}
.options button.wrong,
.q-options label.wrong{
  background:#fff1ed!important;
  border-color:#dda08f!important;
}

/* pronunciation and audio: lavender/mint balance */
.pronunciation-guide-card{
  background:linear-gradient(180deg,#fbfafF,#f7f8fb);
  border-color:#ddd8ec;
}
.pronunciation-symbol{color:#5b568f}
.unit3-source-audio-grid .official-audio-wrap{
  background:#f4f8f6;
  border-color:#d4e2dc;
}
.source-word-chip{
  background:#fff;
  color:#254f45;
  border-color:#cfded8;
}
.pronunciation-source-pairs{
  background:#f4f1fb!important;
  border-color:#ddd6ee!important;
}
.pronunciation-chant{
  background:#fff8e8!important;
  border-color:#eadca9!important;
}

/* reading / writing: paper-like, gentle contrast */
.reading-box,
.reading-feature{
  background:#fffdf8;
  border-color:#e6dfcf;
}
.reading-en{color:#314e46}
.reading-vi{color:#586f67}
.writing{
  background:#fffefb;
}

/* grammar: warm emphasis without glare */
.theory{
  background:#fff;
  border-color:#d8e3df;
}
.formula{
  background:#eef7f3;
  border-left-color:#62a691;
}
.example{
  background:#f8faf9;
}
.special{
  background:#fff7e5;
  color:#66531f;
}
.error{
  background:#fff1ed;
  color:#84483c;
}

/* listening and progress surfaces */
.audio-bar{
  padding:8px;
  border-radius:12px;
  background:#f2f7fa;
  border:1px solid #dce8ee;
}
.result,.recommend{
  background:#f9fbfa;
  border-color:#d6e2dd;
}
.game-progress{
  background:#e7eeeb;
}
.game-progress i,
.bar i{
  background:linear-gradient(90deg,#16806c,#62b39c);
}

/* controls remain comfortable for children */
.filters button{
  background:#fff;
  border-color:#d5e2dd;
  color:#435f57;
}
.filters button.active{
  background:#157865;
  border-color:#157865;
  color:#fff;
}
.input,textarea,select{
  border-color:#c8d8d2;
  background:#fff;
}
.input:focus,textarea:focus,select:focus{
  border-color:#67a997;
  box-shadow:0 0 0 3px rgba(21,120,101,.11);
}
@media(hover:hover){
  .primary:hover{background:#116b5a}
  .secondary:hover,.back:hover{
    background:#eef6f3;
    border-color:#91bcaf;
  }
}

/* mobile: keep the palette airy, not busy */
@media(max-width:700px){
  body{
    background:#f3f7f5;
  }
  .panel-card{
    box-shadow:0 4px 14px rgba(29,67,57,.045);
  }
  .activity-tile:nth-child(n){
    background:#fff;
  }
  .activity-tile:nth-child(4n+1){border-top-color:#8fc8b6}
  .activity-tile:nth-child(4n+2){border-top-color:#9dc6dd}
  .activity-tile:nth-child(4n+3){border-top-color:#e6c978}
  .activity-tile:nth-child(4n+4){border-top-color:#b8addd}
  .tabs{
    background:rgba(248,251,249,.98);
  }
}


/* v2.3.42 · karaoke color-only correction */
.karaoke-card{
  border-color:#cfe2db!important;
  background:linear-gradient(145deg,#fff,#f8fcfa)!important;
}
.karaoke-card .lesson-dialogue-head{
  background:linear-gradient(135deg,#f6fbf9 0%,#ffffff 100%);
  border-bottom-color:#dce8e3;
}
.karaoke-card .lesson-dialogue-head .pill{
  background:#e8f3ee;
  color:#175f52;
  border-color:#cfe1da;
}
.karaoke-card .lesson-dialogue-head h3{
  color:#173f36;
}
.karaoke-card .karaoke-controls .primary{
  background:#157865;
  border-color:#157865;
  color:#fff;
}
.karaoke-card .karaoke-controls .secondary{
  background:#fff;
  border-color:#c8dcd5;
  color:#175f52;
}
.karaoke-card .official-audio-wrap{
  background:#eef7f3;
  border-color:#d2e4dd;
}
.karaoke-card .official-audio-wrap b{
  color:#245d52;
}
.karaoke-card .karaoke-speed{
  background:#f3f8f6;
  color:#4f6d64;
}
.karaoke-card .karaoke-speed button{
  background:#fff;
  border-color:#cfe0da;
  color:#45665d;
}
.karaoke-card .karaoke-speed button.active{
  background:#157865;
  border-color:#157865;
  color:#fff;
}
.karaoke-card .karaoke-speed small{
  color:#4d6b62;
}
.karaoke-card .karaoke-lines .dialogue-line{
  border-color:#dbe7e2;
  background:#fff;
}
.karaoke-card .karaoke-lines .dialogue-line.karaoke-active{
  border-color:#4fa38d;
  background:#eaf7f1;
  box-shadow:0 7px 18px rgba(39,132,106,.11);
}
.karaoke-card .karaoke-lines .dialogue-line.karaoke-done{
  background:#f8fbfa;
}
.karaoke-card .karaoke-word-active{
  background:#ffe08a;
  color:#183d35!important;
}



/* v2.3.43 · global color harmony only */
/* Color-only layer: no layout/content/image/flag/audio/interaction changes. */
:root{
  --ink:#173f36;
  --deep:#16483f;
  --green:#167a68;
  --muted:#566f67;
  --line:#d5e2dd;
  --soft:#f2f7f5;
  --warn:#fff4ee;
  --blue:#eef6fb;
  --pink:#fff3f6;
  --yellow:#fff8e9;
  --purple:#f5f2fb;

  --ui-bg:#f4f7f5;
  --ui-surface:#ffffff;
  --ui-surface-soft:#f6f9f7;
  --ui-ink:#173f36;
  --ui-muted:#566f67;
  --ui-line:#d5e2dd;
  --ui-green:#167a68;
  --ui-green-dark:#16483f;
  --ui-mint:#eaf4f0;
  --ui-ring:rgba(22,122,104,.18);

  --student-bg:#f4f7f5;
  --student-card:#ffffff;
  --student-ink:#173f36;
  --student-muted:#566f67;
  --student-green:#167a68;
  --student-green-dark:#16483f;
  --student-mint:#eaf4f0;
  --student-sky:#eef6fb;
  --student-butter:#fff8e9;
  --student-lilac:#f5f2fb;
  --student-peach:#fff3ee;
  --student-line:#d5e2dd;

  --sgk-en:#245f7a;
  --sgk-en-soft:#edf5f9;
  --sgk-vi:#397565;
  --sgk-vi-soft:#eef6f3;
  --current-lesson:#167a68;
}
body{
  background:#f4f7f5;
  color:#29443c;
}
.ribbon{
  background:#16483f;
  color:#fff;
}
.topbar .pill,
.pill{
  background:#eaf4f0;
  color:#176456;
}
.card,
.panel-card,
.catalog-card,
.lesson-source-card,
.vocab-card,
.q-card,
.lesson-practice-q,
.theory,
.result,
.recommend{
  border-color:#d5e2dd;
  background-color:#fff;
}
.catalog-card{
  background:linear-gradient(135deg,#ffffff 0%,#f9fbfa 65%,#eef6f2 100%);
}
.catalog-status{
  background:#16483f;
  color:#fff;
}
.hero-main{
  background:linear-gradient(135deg,#ffffff 0%,#fbfdfc 100%);
}
.hero h1,
.section h2,
.panel-card h3,
.section-head h3,
.lesson-source-head h2,
.q-card h4,
.exercise .prompt,
.lesson-task b,
.lesson-path-copy b,
.vocab-card b,
.activity-tile b{
  color:#173f36;
}
.hero p,
.panel-card p,
.sub,
.today ul,
.lesson-task small,
.lesson-path-copy small,
.lesson-map button small,
.vocab-card small,
.activity-tile small,
.pronunciation-guide-card p,
.source,
.meta,
.voice-tools>span{
  color:#566f67;
}

/* navigation + actions */
.tabs{
  background:rgba(249,251,250,.98);
  border-color:#d5e2dd;
}
.tabs button{
  background:#fff;
  border-color:#dce7e3;
  color:#415f57;
}
.tabs button.active{
  background:#167a68;
  border-color:#167a68;
  color:#fff;
}
.tabs button.lesson-focus{
  background:#eaf4f0;
  border-color:#86b7aa;
  color:#184f44;
}
.primary{
  background:#167a68;
  color:#fff;
}
.secondary,
.back{
  background:#fff;
  border-color:#cbdcd6;
  color:#1f5e51;
}
.filters button{
  background:#fff;
  border-color:#d4e1dc;
  color:#49645c;
}
.filters button.active{
  background:#167a68;
  border-color:#167a68;
  color:#fff;
}

/* lesson colors: same semantics, softer coordinated tones */
.lesson-map button.lesson-theme-1{--lesson-accent:#4f9f8a;--lesson-soft:#edf7f3}
.lesson-map button.lesson-theme-2{--lesson-accent:#6d9fc1;--lesson-soft:#eef6fb}
.lesson-map button.lesson-theme-3{--lesson-accent:#8a82b7;--lesson-soft:#f4f2fa}
.lesson-map button.lesson-theme-4{--lesson-accent:#c18d59;--lesson-soft:#fff6ed}
.lesson-map button.lesson-theme-5{--lesson-accent:#76a974;--lesson-soft:#f0f7ef}
.lesson-map button.lesson-theme-6{--lesson-accent:#c4a34f;--lesson-soft:#fff9e9}
.lesson-map button.lesson-theme-7{--lesson-accent:#b47b99;--lesson-soft:#fff3f7}
.lesson-map button{
  background:#fff;
  border-color:#d7e3df;
}
.lesson-map button.active{
  background:#eaf4f0!important;
  border-color:#67a594!important;
}
.lesson-enter{
  background:#edf6f2;
  color:#1b6255;
}
.lesson-map button.active .lesson-enter{
  background:#167a68;
  color:#fff;
}
.lesson-task{
  background:#fafcfb;
  border-color:#dae5e1;
}
.lesson-task-no{
  background:#e7f2ee;
  color:#176456;
}
.lesson-callout,
.lesson-scope-notice{
  background:#edf6f2!important;
  border-color:#d7e6e0!important;
  color:#3a5f56!important;
}

/* bilingual text keeps the same flags/images; color only */
.vocab-en,.vocab-example,.repeat-copy h3,.repeat-example,.circle-sentence,.tick-statement,
.lesson-practice-q>b,.q-card h4,.exercise .prompt,.karaoke-en,.recap-card p,
.writing-prompt-bi>div,.project-en,.reading-feature p,.listen-choice b,.match-left b,
.repeat-copy h3,.dialogue-line>div>span:not(.karaoke-en){
  color:#245f7a!important;
}
.vocab-vi,.vocab-example-vi,.repeat-copy>p,.repeat-example-vi,.q-vi,.bilingual-question,
.dialogue-line small,.recap-card small,.writing-prompt-bi small,.project-vi,
.listen-translation,.game-visual-copy b,.match-right b,.reading-vi,.answer-hint span{
  color:#397565!important;
}

/* vocabulary */
.vocab-card{
  background:#fff;
  border-color:#d7e3df;
}
.vocab-visual{
  background:linear-gradient(145deg,#fff9ec,#eef6f3);
  border-color:#d6e2dd;
}
.vocab-card .cat{
  background:#edf6f2;
  color:#356b5f;
}
.vocab-card em{
  color:#236f61;
}

/* activity colors: pastel only, same cards and mechanics */
.activity-tile{
  border-color:#d8e3df;
  color:#29443c;
}
.activity-tile:nth-child(4n+1){
  background:linear-gradient(145deg,#f1f8f5,#ffffff);
  border-top-color:#8ebdad;
}
.activity-tile:nth-child(4n+2){
  background:linear-gradient(145deg,#f0f6fa,#ffffff);
  border-top-color:#9bbfd4;
}
.activity-tile:nth-child(4n+3){
  background:linear-gradient(145deg,#fff9ed,#ffffff);
  border-top-color:#ddc177;
}
.activity-tile:nth-child(4n+4){
  background:linear-gradient(145deg,#f6f3fa,#ffffff);
  border-top-color:#b4abd2;
}
.activity-tile strong{
  background:rgba(255,255,255,.94);
  color:#4a655d;
}

/* questions + answers */
.q-card,
.lesson-practice-q{
  background:#fff;
  border-color:#d7e3df;
}
.bilingual-question,
.lesson-q-vi,
.q-card .q-vi{
  background:#eef6f3!important;
  border-left-color:#78aa9b!important;
  color:#397565!important;
}
.q-options label,
.options button{
  background:#fff;
  border-color:#d5e1dd;
  color:#29443c;
}
.q-options label:hover,
.options button:hover{
  background:#f5f9f7;
  border-color:#9bbeb3;
}
.options button.correct,
.q-options label.correct{
  background:#edf7f1!important;
  border-color:#8abc9a!important;
}
.options button.wrong,
.q-options label.wrong{
  background:#fff3ef!important;
  border-color:#d9a392!important;
}
.feedback.ok{
  background:#edf7f1;
  color:#2a6a49;
}
.feedback.bad{
  background:#fff2ef;
  color:#8a4a40;
}

/* pronunciation + source audio */
.pronunciation-guide-card{
  background:#f7f5fb;
  border-color:#ddd8e8;
}
.pronunciation-symbol{
  color:#6d6798;
}
.unit3-source-audio-grid .official-audio-wrap,
.official-audio-wrap{
  background:#eef6f3;
  border-color:#d3e3dd;
}
.official-audio-wrap b{
  color:#2b6257;
}
.source-word-chip{
  background:#fff;
  color:#31594f;
  border-color:#d1ded9;
}
.pronunciation-source-pairs{
  background:#f5f2fa!important;
  border-color:#ded8ea!important;
}
.pronunciation-chant{
  background:#fff8e9!important;
  border-color:#eadcad!important;
}

/* reading + writing */
.reading-box,
.reading-feature{
  background:#fffdfa;
  border-color:#e5ded0;
}
.reading-en{
  color:#365466;
}
.reading-vi{
  color:#527166;
}
.writing{
  background:#fffefa;
}

/* grammar */
.theory{
  background:#fff;
  border-color:#d8e3df;
}
.formula{
  background:#eef6f3;
  border-left-color:#75a998;
}
.example{
  background:#f8faf9;
}
.special{
  background:#fff8e8;
  color:#685724;
}
.error{
  background:#fff3ef;
  color:#824a40;
}

/* audio, karaoke, progress */
.audio-bar{
  background:#f1f6f9;
  border-color:#dae7ec;
}
.karaoke-card{
  background:linear-gradient(145deg,#fff,#f9fcfa)!important;
  border-color:#cfe1da!important;
}
.karaoke-card .lesson-dialogue-head{
  background:linear-gradient(135deg,#f6faf8 0%,#ffffff 100%);
  border-bottom-color:#dde8e4;
}
.karaoke-card .lesson-dialogue-head .pill{
  background:#eaf4f0;
  color:#176456;
  border-color:#cfe0da;
}
.karaoke-card .karaoke-controls .primary,
.karaoke-card .karaoke-speed button.active{
  background:#167a68;
  border-color:#167a68;
  color:#fff;
}
.karaoke-card .karaoke-controls .secondary,
.karaoke-card .karaoke-speed button{
  background:#fff;
  border-color:#cdded8;
  color:#416259;
}
.karaoke-card .official-audio-wrap{
  background:#eef6f3;
  border-color:#d4e3de;
}
.karaoke-card .karaoke-speed{
  background:#f4f8f6;
  color:#526f66;
}
.karaoke-card .karaoke-lines .dialogue-line{
  background:#fff;
  border-color:#dbe6e2;
}
.karaoke-card .karaoke-lines .dialogue-line.karaoke-active{
  background:#eaf6f1;
  border-color:#64a994;
}
.karaoke-card .karaoke-lines .dialogue-line.karaoke-done{
  background:#f8faf9;
}
.karaoke-card .karaoke-word-active{
  background:#ffe39b;
  color:#183d35!important;
}
.game-progress,
.bar{
  background:#e8efec;
}
.game-progress i,
.bar i{
  background:linear-gradient(90deg,#167a68,#69ad99);
}

/* results, forms, teacher/student panels */
.result,
.recommend,
.teacher-summary>div,
.teacher-cols>div,
.submission,
.submission-card{
  background-color:#f9fbfa;
  border-color:#d7e3df;
}
.input,textarea,select{
  background:#fff;
  border-color:#cbdad5;
  color:#29443c;
}
.input:focus,textarea:focus,select:focus{
  border-color:#76a999;
}
.master{
  background:#fff;
  border-color:#d7e3df;
}
.master span,.master small,
.teacher-summary span,.teacher-summary small,
.teacher-cols p{
  color:#5a7069;
}

/* semantic panel accents stay visible but coordinated */
.panel[data-panel="vocab"] .panel-card:first-child{border-top-color:#8ebdad}
.panel[data-panel="pronunciation"] .panel-card:first-child{border-top-color:#aaa2cb}
.panel[data-panel="grammar"] .panel-card:first-child{border-top-color:#d7bc74}
.panel[data-panel="practice"] .panel-card:first-child{border-top-color:#dca38d}
.panel[data-panel="listening"] .panel-card:first-child{border-top-color:#94bcd2}
.panel[data-panel="reading"] .panel-card:first-child{border-top-color:#98a9cf}
.panel[data-panel="test"] .panel-card:first-child{border-top-color:#9dbb83}
.panel[data-panel="results"] .panel-card:first-child{border-top-color:#86b7a8}

@media(max-width:700px){
  body{
    background:#f4f7f5;
  }
  .tabs{
    background:rgba(249,251,250,.98);
  }
  .activity-tile:nth-child(n){
    background:#fff;
  }
}


/* v2.3.44 · visible student palette color-only */
/* STRICTLY COLORS ONLY: no content, image, flag, audio, spacing, size, position or layout changes. */
:root{
  --ink:#173f36;
  --deep:#124b40;
  --green:#147b69;
  --muted:#536d65;
  --line:#cfddd8;
  --soft:#eef5f2;
  --warn:#fff0ea;
  --blue:#eaf4fb;
  --pink:#fff0f5;
  --yellow:#fff5dd;
  --purple:#f2eefb;

  --ui-bg:#e9f1ed;
  --ui-surface:#ffffff;
  --ui-surface-soft:#f2f7f4;
  --ui-ink:#173f36;
  --ui-muted:#536d65;
  --ui-line:#cfddd8;
  --ui-green:#147b69;
  --ui-green-dark:#124b40;
  --ui-mint:#dff0e9;
  --ui-ring:rgba(20,123,105,.20);

  --sgk-en:#245f7d;
  --sgk-en-soft:#eaf3f9;
  --sgk-vi:#2f7563;
  --sgk-vi-soft:#e7f3ee;
}
body{
  background:#e9f1ed;
  color:#29443c;
}
.ribbon{
  background:#124b40;
}
.card,
.panel-card,
.catalog-card,
.lesson-source-card{
  border-color:#cfddd8;
  background-color:#ffffff;
}
.catalog-card{
  background:linear-gradient(135deg,#ffffff 0%,#f4faf7 68%,#e4f1eb 100%);
}
.catalog-status{
  background:#124b40;
}
.hero-main{
  background:linear-gradient(135deg,#ffffff 0%,#f5faf8 100%);
}
.topbar .pill,
.pill{
  background:#dff0e9;
  color:#145f51;
}

/* clearer navigation */
.tabs{
  background:#f3f8f5;
  border-color:#c8d8d2;
}
.tabs button{
  background:#ffffff;
  border-color:#d5e2dd;
  color:#3c5e55;
}
.tabs button.active{
  background:#147b69;
  border-color:#147b69;
  color:#ffffff;
}
.tabs button.lesson-focus{
  background:#def0e8;
  border-color:#78af9f;
  color:#174e43;
}
.primary{
  background:#147b69;
  color:#ffffff;
}
.secondary,
.back{
  background:#ffffff;
  border-color:#bfd4cc;
  color:#185e51;
}
.filters button{
  background:#ffffff;
  border-color:#cfddd8;
  color:#456159;
}
.filters button.active{
  background:#147b69;
  border-color:#147b69;
  color:#ffffff;
}

/* stronger but calm semantic surfaces across modules */
.panel[data-panel="vocab"] .panel-card:first-child{
  background:#edf8f3;
  border-color:#bddfD1;
  border-top-color:#69ad96;
}
.panel[data-panel="pronunciation"] .panel-card:first-child{
  background:#f3f0fa;
  border-color:#d8d1ea;
  border-top-color:#9990c8;
}
.panel[data-panel="grammar"] .panel-card:first-child{
  background:#fff8e6;
  border-color:#eadfb9;
  border-top-color:#cfad55;
}
.panel[data-panel="practice"] .panel-card:first-child{
  background:#fff2ec;
  border-color:#ead4ca;
  border-top-color:#d59176;
}
.panel[data-panel="listening"] .panel-card:first-child{
  background:#ebf5fb;
  border-color:#cee2ed;
  border-top-color:#76aeca;
}
.panel[data-panel="reading"] .panel-card:first-child{
  background:#eef3fb;
  border-color:#d3ddec;
  border-top-color:#839ac6;
}
.panel[data-panel="test"] .panel-card:first-child{
  background:#f0f7e9;
  border-color:#d9e6cb;
  border-top-color:#8eae6c;
}
.panel[data-panel="results"] .panel-card:first-child{
  background:#ebf7f2;
  border-color:#cde3da;
  border-top-color:#72aE9c;
}

/* current lesson + lesson flow */
.lesson-map button{
  background:#ffffff;
  border-color:#d2e0db;
}
.lesson-map button.active{
  background:#dff0e9!important;
  border-color:#5f9f8e!important;
  box-shadow:inset 5px 0 0 #147b69!important;
}
.lesson-enter{
  background:#e6f2ed;
  color:#176051;
}
.lesson-map button.active .lesson-enter{
  background:#147b69;
  color:#ffffff;
}
.lesson-callout,
.lesson-scope-notice{
  background:#dff0e9!important;
  border-color:#c3dfd4!important;
  color:#305d51!important;
}
.lesson-task{
  background:#f7faf8;
  border-color:#d5e2dd;
}
.lesson-task-no{
  background:#dceee7;
  color:#126654;
}

/* bilingual colors only — flags/images remain exactly as-is */
.vocab-en,.vocab-example,.repeat-copy h3,.repeat-example,.circle-sentence,.tick-statement,
.lesson-practice-q>b,.q-card h4,.exercise .prompt,.karaoke-en,.recap-card p,
.writing-prompt-bi>div,.project-en,.reading-feature p,.listen-choice b,.match-left b,
.repeat-copy h3,.dialogue-line>div>span:not(.karaoke-en){
  color:#245f7d!important;
}
.vocab-vi,.vocab-example-vi,.repeat-copy>p,.repeat-example-vi,.q-vi,.bilingual-question,
.dialogue-line small,.recap-card small,.writing-prompt-bi small,.project-vi,
.listen-translation,.game-visual-copy b,.match-right b,.reading-vi,.answer-hint span{
  color:#2f7563!important;
}

/* vocabulary */
.vocab-card{
  background:#ffffff;
  border-color:#d3e0db;
}
.vocab-visual{
  background:linear-gradient(145deg,#fff3cf,#e8f4ef);
  border-color:#d0dfd9;
}
.vocab-card .cat{
  background:#dff0e9;
  color:#2e6c5d;
}
.vocab-card em{
  color:#1e705f;
}

/* practice tiles: visibly different, still soft */
.activity-tile{
  border-color:#d4e1dc;
}
.activity-tile:nth-child(4n+1){
  background:linear-gradient(145deg,#eaf7f1,#ffffff);
  border-top-color:#75b49f;
}
.activity-tile:nth-child(4n+2){
  background:linear-gradient(145deg,#e9f4fb,#ffffff);
  border-top-color:#83b6d0;
}
.activity-tile:nth-child(4n+3){
  background:linear-gradient(145deg,#fff5dd,#ffffff);
  border-top-color:#d8b75e;
}
.activity-tile:nth-child(4n+4){
  background:linear-gradient(145deg,#f1edfa,#ffffff);
  border-top-color:#a99dcf;
}

/* questions */
.q-card,
.lesson-practice-q{
  background:#ffffff;
  border-color:#d3e0db;
}
.bilingual-question,
.lesson-q-vi,
.q-card .q-vi{
  background:#e7f3ee!important;
  border-left-color:#5d9f8d!important;
  color:#2f7563!important;
}
.q-options label,
.options button{
  background:#ffffff;
  border-color:#d2dfda;
}
.q-options label:hover,
.options button:hover{
  background:#eef6f2;
  border-color:#8fb9ad;
}
.options button.correct,
.q-options label.correct{
  background:#e5f5eb!important;
  border-color:#72b48a!important;
}
.options button.wrong,
.q-options label.wrong{
  background:#fff0eb!important;
  border-color:#d7927d!important;
}
.feedback.ok{
  background:#e5f5eb;
  color:#256740;
}
.feedback.bad{
  background:#fff0eb;
  color:#874439;
}

/* pronunciation */
.pronunciation-guide-card{
  background:#f0edf9;
  border-color:#d5cfe7;
}
.pronunciation-symbol{
  color:#625b91;
}
.pronunciation-source-pairs{
  background:#eeeaf8!important;
  border-color:#d2cbe5!important;
}
.pronunciation-chant{
  background:#fff5dd!important;
  border-color:#e5d49d!important;
}
.source-word-chip{
  background:#ffffff;
  border-color:#cadbd5;
  color:#2c574d;
}

/* audio & listening */
.official-audio-wrap,
.unit3-source-audio-grid .official-audio-wrap{
  background:#e8f4ef;
  border-color:#cce1d8;
}
.official-audio-wrap b{
  color:#275f53;
}
.audio-bar{
  background:#e9f4fb;
  border-color:#cfe2ed;
}

/* karaoke: same content/layout/flags, colors only */
.karaoke-card{
  background:#ffffff!important;
  border-color:#c9ded6!important;
}
.karaoke-card .lesson-dialogue-head{
  background:#e8f4ef;
  border-bottom-color:#cfe2da;
}
.karaoke-card .lesson-dialogue-head .pill{
  background:#d7ebe3;
  color:#145f51;
  border-color:#bdd9ce;
}
.karaoke-card .karaoke-controls .primary,
.karaoke-card .karaoke-speed button.active{
  background:#147b69;
  border-color:#147b69;
  color:#ffffff;
}
.karaoke-card .karaoke-controls .secondary,
.karaoke-card .karaoke-speed button{
  background:#ffffff;
  border-color:#c4d8d1;
  color:#3d6056;
}
.karaoke-card .official-audio-wrap{
  background:#e7f2fb;
  border-color:#cbdfea;
}
.karaoke-card .karaoke-speed{
  background:#fff5dd;
  color:#655728;
  border-color:#eadcac;
}
.karaoke-card .karaoke-lines .dialogue-line{
  background:#ffffff;
  border-color:#d5e1dd;
}
.karaoke-card .karaoke-lines .dialogue-line:nth-child(4n+1){
  background:#eef8f4;
}
.karaoke-card .karaoke-lines .dialogue-line:nth-child(4n+2){
  background:#eef6fb;
}
.karaoke-card .karaoke-lines .dialogue-line:nth-child(4n+3){
  background:#fff8e8;
}
.karaoke-card .karaoke-lines .dialogue-line:nth-child(4n+4){
  background:#f4f1fb;
}
.karaoke-card .karaoke-lines .dialogue-line.karaoke-active{
  background:#dff3ea!important;
  border-color:#4e9c87!important;
}
.karaoke-card .karaoke-lines .dialogue-line.karaoke-done{
  background:#f5f8f6!important;
}
.karaoke-card .karaoke-word-active{
  background:#ffdc72;
  color:#183d35!important;
}

/* grammar */
.theory{
  background:#ffffff;
  border-color:#d4e1dc;
}
.formula{
  background:#e7f3ee;
  border-left-color:#5f9f8d;
}
.example{
  background:#f5f8f6;
}
.special{
  background:#fff5dd;
  color:#66531d;
}
.error{
  background:#fff0eb;
  color:#834439;
}

/* reading & writing */
.reading-box,
.reading-feature{
  background:#fff9eb;
  border-color:#e6d9b4;
}
.reading-en{
  color:#36576b;
}
.reading-vi{
  color:#3f725f;
}
.writing{
  background:#fffdf6;
}

/* results + forms */
.result,
.recommend,
.teacher-summary>div,
.teacher-cols>div,
.submission,
.submission-card{
  background:#f5f9f7;
  border-color:#d2dfda;
}
.input,textarea,select{
  background:#ffffff;
  border-color:#c5d7d0;
  color:#29443c;
}
.input:focus,textarea:focus,select:focus{
  border-color:#5f9f8d;
}
.master{
  background:#ffffff;
  border-color:#d3e0db;
}
.game-progress,
.bar{
  background:#dfe9e5;
}
.game-progress i,
.bar i{
  background:#55a58f;
}

/* On mobile keep the same layout but preserve visible color coding. */
@media(max-width:700px){
  body{
    background:#eaf1ee;
  }
  .tabs{
    background:rgba(243,248,245,.99);
  }
  .activity-tile:nth-child(4n+1){background:#eef8f4}
  .activity-tile:nth-child(4n+2){background:#eef6fb}
  .activity-tile:nth-child(4n+3){background:#fff8e8}
  .activity-tile:nth-child(4n+4){background:#f4f1fb}
}


/* v2.3.61 · lesson-scoped function locks
   Keep the whole Unit navigation visible, but only the functions belonging to
   the current Lesson are interactive. Unit Review unlocks the Unit scope. */
#tabs.tabs button.lesson-locked{
  position:relative;
  opacity:.48!important;
  cursor:not-allowed!important;
  background:#f4f6f5!important;
  border-color:#d9e1de!important;
  color:#7a8c86!important;
  box-shadow:none!important;
  filter:saturate(.55);
}
#tabs.tabs button.lesson-locked::after{
  content:'🔒';
  margin-left:6px;
  font-size:12px;
  line-height:1;
  opacity:.88;
}
#tabs.tabs button.lesson-locked:hover{
  transform:none!important;
  opacity:.52!important;
}
#tabs.tabs button.lesson-focus:not(.lesson-locked){
  opacity:1!important;
}
@media(max-width:760px){
  #tabs.tabs button.lesson-locked::after{font-size:11px;margin-left:4px}
}


/* v2.3.62 · responsive typography pass
   Goal: larger, easier-to-read desktop text while keeping mobile compact,
   touch-safe, and resistant to overflow/overlap. */
html,body{max-width:100%;overflow-x:hidden}
.shell,.shell>*,
.card,.panel-card,.section-head,.voice-tools,
.lesson-map,.lesson-map>*,
.vocab-grid,.vocab-card,.vocab-card>*,
.activity-grid,.activity-tile,.activity-tile>*,
.q-card,.q-card>*,
.pronunciation-guide-grid,.pronunciation-guide-grid>*,
.unit3-source-audio-grid,.unit3-source-audio-grid>*{
  min-width:0;
}
img,svg,video,canvas,audio{max-width:100%}
audio{min-width:0}
.panel-card h2,.panel-card h3,.panel-card h4,
.lesson-map button b,.lesson-map button small,
.vocab-card,.vocab-copy,.vocab-en,.vocab-vi,
.vocab-example,.vocab-example-vi,
.activity-copy,.activity-copy b,.activity-copy small,
.q-card h4,.bilingual-question,.lesson-q-vi,
.dialogue-line,.dialogue-line>*,
.pronunciation-guide-card,.pronunciation-guide-card>*{
  overflow-wrap:break-word;
  word-break:normal;
}

/* Desktop / large laptop: deliberately larger reading size. */
@media(min-width:1200px){
  .shell{max-width:1460px;padding-left:24px;padding-right:24px}
  body{font-size:18px;line-height:1.58}
  h1{font-size:42px;line-height:1.12}
  h2{font-size:30px;line-height:1.2}
  h3{font-size:25px;line-height:1.26}
  h4{font-size:21px;line-height:1.34}
  p,.sub{font-size:17px;line-height:1.58}

  .catalog-head h2{font-size:27px}
  .catalog-notice,.catalog-status{font-size:16px}
  .hero h1{font-size:clamp(38px,3vw,46px)}
  .hero-main #unitHeroDesc{font-size:18px}
  .today ul{font-size:17px}

  .tabs{gap:8px;padding:8px}
  .tabs button{
    min-height:52px;
    padding:10px 16px;
    font-size:18px;
    line-height:1.2;
  }

  .panel-card{padding:24px}
  .section-head{gap:18px}
  .section-head h3,.panel-card>h3{font-size:26px}
  .section-head p,.panel-card>p{font-size:17px}
  .voice-tools>span{font-size:15px}
  .voice-tools button{font-size:17px;min-height:48px}

  .lesson-map button{min-height:98px;padding:15px 17px}
  .lesson-map button b{font-size:19px;line-height:1.32}
  .lesson-map button small{font-size:15.5px;line-height:1.42}
  .lesson-enter{font-size:14.5px}

  .lesson-scope-banner b{font-size:20px}
  .lesson-scope-banner small{font-size:16px}
  .lesson-callout{font-size:18px}
  .lesson-task b{font-size:18px}
  .lesson-task small{font-size:16px}
  .lesson-path-copy b{font-size:18px}
  .lesson-path-copy small{font-size:15.5px}

  .filters button{font-size:15px;min-height:42px;padding:8px 12px}
  .vocab-card{min-height:116px;padding:14px 15px}
  .vocab-card b{font-size:22px}
  .vocab-card em{font-size:16.5px}
  .vocab-card small,.vocab-example,.vocab-example-vi,.vocab-vi{font-size:16px;line-height:1.5}
  .vocab-card .cat{font-size:12.5px}

  .activity-tile{min-height:116px;padding:15px}
  .activity-tile b{font-size:17.5px;line-height:1.35}
  .activity-tile small{font-size:14.5px;line-height:1.45}
  .activity-tile strong{font-size:13px}

  .exercise .prompt,.game-stage .prompt{font-size:22px}
  .q-card h4{font-size:20px;line-height:1.4}
  .q-options label,.options button{font-size:17.5px;line-height:1.45}
  .bilingual-question,.lesson-q-vi{font-size:16.5px!important;line-height:1.5!important}
  .meta{font-size:13px}
  .source{font-size:15.5px}

  .dialogue-line .karaoke-en,.dialogue-line>div>span{font-size:18px}
  .dialogue-line small{font-size:16px}
  .pronunciation-guide-card p{font-size:16.5px}
  .source-word-chip{font-size:15.5px}
  .writing-prompt-bi>div{font-size:18px}
  .writing-prompt-bi small{font-size:16px}
}

/* Tablet / small laptop: slightly enlarged, but not as aggressive as desktop. */
@media(min-width:761px) and (max-width:1199px){
  body{font-size:17px}
  h1{font-size:34px}
  h2{font-size:26px}
  h3{font-size:22px}
  h4{font-size:19px}
  p,.sub{font-size:16px}
  .tabs button{font-size:16.5px;min-height:48px;padding:9px 13px}
  .panel-card{padding:19px}
  .section-head h3,.panel-card>h3{font-size:23px}
  .lesson-map button b{font-size:17px}
  .lesson-map button small{font-size:14px}
  .vocab-card b{font-size:20px}
  .vocab-card em{font-size:15px}
  .vocab-card small,.vocab-example,.vocab-example-vi,.vocab-vi{font-size:15px}
  .q-card h4{font-size:18.5px}
}

/* Mobile: preserve readability without letting enlarged desktop typography spill over. */
@media(max-width:760px){
  body{font-size:16px;line-height:1.52}
  .shell{width:100%;max-width:100%;padding-left:10px;padding-right:10px}
  h1{font-size:28px;line-height:1.14}
  h2{font-size:23px;line-height:1.22}
  h3{font-size:20px;line-height:1.28}
  h4{font-size:18px;line-height:1.35}
  p,.sub{font-size:15px;line-height:1.52}

  .tabs{
    width:100%;
    max-width:100%;
    overflow-x:auto!important;
    overflow-y:hidden!important;
    overscroll-behavior-x:contain;
    -webkit-overflow-scrolling:touch;
    scroll-snap-type:x proximity;
  }
  .tabs button{
    flex:0 0 auto;
    max-width:none;
    min-height:46px;
    padding:8px 11px;
    font-size:15px;
    white-space:nowrap;
  }

  .panel-card{padding:14px}
  .section-head{width:100%;flex-direction:column;gap:9px}
  .section-head h3,.panel-card>h3{font-size:21px}
  .section-head p,.panel-card>p{font-size:15px}
  .voice-tools{
    width:100%;
    max-width:100%;
    overflow-x:auto;
    overflow-y:hidden;
    flex-wrap:nowrap;
    -webkit-overflow-scrolling:touch;
  }
  .voice-tools>*{flex:0 0 auto}

  .lesson-map{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lesson-map button{min-width:0;padding:11px}
  .lesson-map button b{font-size:15.5px;line-height:1.32}
  .lesson-map button small{font-size:12.8px;line-height:1.4}
  .lesson-enter{font-size:12.5px}

  .vocab-grid{grid-template-columns:1fr}
  .vocab-card{
    grid-template-columns:58px minmax(0,1fr)!important;
    gap:10px;
    padding:11px!important;
  }
  .vocab-card b{font-size:18px}
  .vocab-card em{font-size:14px}
  .vocab-card small,.vocab-example,.vocab-example-vi,.vocab-vi{font-size:14px!important;line-height:1.45}
  .vocab-term-audio-row,.vocab-example-audio-row{min-width:0}
  .vocab-term-audio-row>*,.vocab-example-audio-row>*{min-width:0}

  .activity-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .activity-tile{min-width:0;padding:11px}
  .activity-tile b{font-size:14.5px;line-height:1.35}
  .activity-tile small{font-size:12.5px;line-height:1.4}

  .q-card{padding:11px}
  .q-card h4{font-size:17px;line-height:1.42}
  .q-options,.options{grid-template-columns:1fr}
  .q-options label,.options button{font-size:15px;line-height:1.45}
  .bilingual-question,.lesson-q-vi{font-size:14.5px!important;line-height:1.48!important}

  .unit3-source-audio-grid{grid-template-columns:1fr}
  .official-audio-wrap{min-width:0}
  .official-audio-wrap audio{display:block;width:100%;max-width:100%;min-width:0}
  .repeat-actions{flex-wrap:wrap}
  .repeat-actions button{white-space:normal;min-width:0}
}

/* Narrow phones: one-column cards where two columns become cramped. */
@media(max-width:430px){
  .shell{padding-left:8px;padding-right:8px}
  body{font-size:15.5px}
  h1{font-size:26px}
  h2{font-size:22px}
  h3{font-size:19px}
  .tabs{gap:5px;padding:5px}
  .tabs button{font-size:14.5px;min-height:44px;padding:8px 10px}

  .lesson-map,.activity-grid{grid-template-columns:1fr}
  .lesson-map button{min-height:78px}
  .lesson-map button b{font-size:15.5px}
  .lesson-map button small{font-size:12.5px}

  .panel-card{padding:12px}
  .section-head h3,.panel-card>h3{font-size:20px}
  .vocab-card{grid-template-columns:52px minmax(0,1fr)!important}
  .vocab-visual,.sgk-3d-visual.small{width:52px!important;height:52px!important}
  .vocab-card b{font-size:17.5px}
  .vocab-card em{font-size:13.5px}

  .voice-tools button,.primary,.secondary,.chip{
    min-height:44px;
    font-size:14.5px;
  }
  .q-card h4{font-size:16.5px}
  .bilingual-question,.lesson-q-vi{font-size:14px!important}
}

/* Very narrow iPhone/Android widths: extra anti-overlap safeguards. */
@media(max-width:360px){
  .shell{padding-left:6px;padding-right:6px}
  .tabs button{font-size:14px;padding-left:9px;padding-right:9px}
  .panel-card{padding:10px}
  .vocab-card{grid-template-columns:48px minmax(0,1fr)!important;gap:8px;padding:9px!important}
  .vocab-visual,.sgk-3d-visual.small{width:48px!important;height:48px!important}
  .vocab-card b{font-size:17px}
  .lesson-map button b{font-size:15px}
  .lesson-map button small{font-size:12px}
  .activity-tile b{font-size:14px}
  .activity-tile small{font-size:12px}
}


/* v2.3.63 · Lesson 5 vocabulary pronunciation + translation */
.camp-activity-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.camp-activity-chip{
  display:flex;
  align-items:center;
  gap:8px;
  min-width:0;
  padding:8px 10px;
  border:1px solid #cfe2da;
  border-radius:12px;
  background:#eef7f3;
}
.camp-activity-chip>div{display:grid;gap:2px;min-width:0}
.camp-activity-en{
  color:var(--sgk-en)!important;
  font-weight:800;
  line-height:1.3;
}
.camp-activity-vi{
  color:var(--sgk-vi)!important;
  font-size:13px;
  line-height:1.35;
}
.camp-audio-btn{
  flex:0 0 auto;
  min-width:38px;
  min-height:38px;
  padding:7px 9px;
  border:1px solid #bdd8ce;
  border-radius:10px;
  background:#fff;
  color:#155f51;
  font-weight:800;
  cursor:pointer;
}
.camp-audio-btn:hover{background:#e5f3ed}
.camp-vocab-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.camp-vocab-card{
  min-width:0;
  display:grid;
  align-content:start;
  gap:8px;
}
.camp-vocab-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  min-width:0;
}
.camp-vocab-head b{
  min-width:0;
  margin:0!important;
  font-size:20px!important;
  overflow-wrap:anywhere;
}
.camp-vocab-card .camp-vocab-ipa{
  margin:0!important;
  font-size:16px!important;
}
.camp-vocab-card .camp-vocab-vi{
  margin:0;
  font-size:15px!important;
  line-height:1.45;
}
.reading-translation-title{
  margin-bottom:8px;
  font-weight:900;
  color:#176554;
}
#readingTranslation{
  padding:14px 16px;
  border:1px solid #cfe2da;
  border-radius:14px;
  background:#f1f8f5;
  color:#2f7563;
  line-height:1.6;
}

/* Reuse the real flag markers without duplicating emoji text. */
.camp-vocab-card .camp-vocab-ipa,
.camp-vocab-card .camp-vocab-vi{
  display:flex;
  align-items:flex-start;
  gap:8px;
  position:relative;
}
.camp-vocab-card .camp-vocab-ipa::before,
.camp-vocab-card .camp-vocab-vi::before{
  content:'';
  width:22px;
  height:14px;
  min-width:22px;
  margin-top:.28em;
  border-radius:2px;
  background-size:cover;
  background-position:center;
  box-shadow:0 0 0 1px rgba(10,35,60,.12);
}
.camp-vocab-card .camp-vocab-ipa::before{background-image:var(--sgk-flag-uk)}
.camp-vocab-card .camp-vocab-vi::before{background-image:var(--sgk-flag-vn)}

@media(max-width:1000px){
  .camp-vocab-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:760px){
  .camp-activity-list{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .camp-activity-chip{width:100%}
  .camp-vocab-grid{grid-template-columns:1fr}
  .camp-vocab-head b{font-size:18px!important}
  .camp-vocab-card .camp-vocab-ipa{font-size:14.5px!important}
  .camp-vocab-card .camp-vocab-vi{font-size:14px!important}
  #readingTranslation{padding:12px;font-size:14.5px}
}
@media(max-width:430px){
  .camp-activity-list{grid-template-columns:1fr}
  .camp-activity-chip{padding:8px}
  .camp-audio-btn{min-width:36px;min-height:36px;padding:6px 8px}
  .camp-vocab-head{align-items:flex-start}
  .camp-vocab-head .camp-audio-btn{font-size:13px}
}


/* v2.3.64 · complete function bar + student evaluation + class leaderboard + teacher dashboard */
@media(min-width:900px){
  #tabs.tabs{
    flex-wrap:wrap!important;
    overflow-x:visible!important;
    overflow-y:visible!important;
    align-items:stretch;
  }
  #tabs.tabs button{
    flex:0 0 auto;
  }
}
@media(max-width:899px){
  #tabs.tabs{
    flex-wrap:nowrap!important;
    overflow-x:auto!important;
    overflow-y:hidden!important;
    -webkit-overflow-scrolling:touch;
  }
  #tabs.tabs button{flex:0 0 auto}
}

.evaluation-empty{
  padding:18px 20px;
  border:1px dashed #bed7ce;
  border-radius:16px;
  background:#f6faf8;
  color:#45675e;
}
.evaluation-empty b{display:block;font-size:18px;color:#174f43;margin-bottom:5px}
.evaluation-empty p{margin:0;font-size:15px;line-height:1.55}

.student-evaluation-card{
  display:grid;
  gap:14px;
  padding:18px;
  border:1px solid #cce0d8;
  border-radius:18px;
  background:linear-gradient(145deg,#ffffff,#f1f8f5);
}
.student-evaluation-head{
  display:flex;
  justify-content:space-between;
  gap:14px;
  align-items:flex-start;
}
.student-evaluation-head h4{margin:8px 0 0;font-size:23px;color:#174f43}
.student-evaluation-score{
  display:grid;
  place-items:center;
  min-width:88px;
  min-height:64px;
  padding:8px 14px;
  border-radius:16px;
  background:#167a68;
  color:#fff;
  font-size:24px;
}
.student-evaluation-feedback{
  padding:14px 15px;
  border-radius:14px;
  background:#fff;
  border:1px solid #d7e5e0;
}
.student-evaluation-feedback b{color:#185f52}
.student-evaluation-feedback p{margin:7px 0 0;line-height:1.6}

.leaderboard-head{
  display:flex;
  justify-content:space-between;
  gap:14px;
  align-items:flex-end;
  margin-bottom:12px;
}
.leaderboard-head h4{margin:7px 0 0;font-size:20px}
.leaderboard-table{display:grid;gap:7px}
.leaderboard-row{
  display:grid;
  grid-template-columns:58px minmax(180px,1.6fr) minmax(105px,.7fr) minmax(105px,.7fr) minmax(105px,.7fr);
  gap:10px;
  align-items:center;
  min-width:0;
  padding:11px 13px;
  border:1px solid #d8e4df;
  border-radius:13px;
  background:#fff;
}
.leaderboard-row.is-me{
  border-color:#76b7a5;
  background:#eaf6f1;
  box-shadow:0 0 0 2px rgba(22,122,104,.07);
}
.leaderboard-rank{font-size:22px;font-weight:900;text-align:center}
.leaderboard-name{min-width:0}
.leaderboard-name b{display:block;overflow-wrap:anywhere}
.leaderboard-name small{display:inline-block;margin-top:3px;color:#167a68;font-weight:800}
.leaderboard-row>div:not(.leaderboard-name){text-align:center}
.leaderboard-row>div>strong{display:block;font-size:17px;color:#174f43}
.leaderboard-row>div>small{display:block;font-size:11.5px;color:#617970;margin-top:2px}
.teacher-class-leaderboard{margin:16px 0 22px}
.teacher-class-leaderboard>h4{margin:0 0 9px}

.teacher-summary-live{margin-bottom:14px}
.teacher-student-card{
  display:grid;
  gap:13px;
  margin:0 0 16px;
  padding:16px;
  border:1px solid #d4e2dd;
  border-radius:17px;
  background:#fff;
  box-shadow:0 6px 18px rgba(29,72,60,.045);
}
.teacher-student-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:12px;
}
.teacher-student-head h4{margin:0;font-size:20px;color:#173f36}
.teacher-student-head small{display:block;margin-top:4px;color:#617970}
.teacher-performance{
  flex:0 0 auto;
  padding:6px 10px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:900;
}
.teacher-performance.excellent{background:#e7f5ea;color:#28713a}
.teacher-performance.good{background:#e9f4f1;color:#156b5c}
.teacher-performance.practice{background:#fff5dc;color:#8a6413}
.teacher-performance.weak{background:#fff0eb;color:#a64d35}
.teacher-performance.none{background:#eef2f0;color:#6e7e79}

.teacher-student-metrics{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:8px;
}
.teacher-student-metrics>div{
  padding:11px;
  border-radius:12px;
  background:#f5f9f7;
  border:1px solid #dfe9e5;
  text-align:center;
}
.teacher-student-metrics b{display:block;font-size:18px;color:#174f43}
.teacher-student-metrics small{display:block;font-size:11.5px;color:#667c75;margin-top:3px}

.teacher-section-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:8px;
}
.teacher-section-grid>div{
  min-width:0;
  padding:10px 11px;
  border:1px solid #dbe7e2;
  border-radius:12px;
  background:#fbfdfc;
}
.teacher-section-grid b{
  display:block;
  font-size:13px;
  color:#49665e;
  overflow-wrap:anywhere;
}
.teacher-section-grid strong{display:block;margin:4px 0;font-size:18px;color:#176554}
.teacher-section-grid small{display:block;font-size:11.5px;color:#6c817a}

.teacher-wrong-details{
  border:1px solid #eadbc6;
  border-radius:13px;
  background:#fffaf1;
  overflow:hidden;
}
.teacher-wrong-details summary{
  padding:10px 12px;
  cursor:pointer;
  font-weight:850;
  color:#855d20;
}
.teacher-wrong-row{
  display:grid;
  gap:4px;
  padding:10px 12px;
  border-top:1px solid #efe3d3;
}
.teacher-wrong-row b{font-size:12px;color:#795b31}
.teacher-wrong-row span{font-size:14px;line-height:1.4}
.teacher-wrong-row small{font-size:12px;color:#806b50}

.teacher-review-editor{
  display:grid;
  grid-template-columns:minmax(120px,.5fr) minmax(170px,.7fr) minmax(260px,1.8fr);
  gap:10px;
  align-items:end;
  padding-top:12px;
  border-top:1px solid #e2ebe7;
}
.teacher-review-editor label{display:grid;gap:5px}
.teacher-review-editor label>span{font-size:12px;font-weight:800;color:#526d65}
.teacher-review-comment textarea{min-height:72px;resize:vertical}
.teacher-release-check{
  grid-column:1 / span 2;
  display:flex!important;
  grid-template-columns:none!important;
  align-items:center;
  gap:8px!important;
  min-height:42px;
}
.teacher-release-check input{width:18px;height:18px}
.teacher-review-editor .primary{min-height:44px}
.vnn-review-save-status{font-size:12px;color:#176554;font-weight:800}

@media(max-width:1000px){
  .leaderboard-row{grid-template-columns:48px minmax(150px,1.4fr) repeat(3,minmax(92px,.7fr))}
  .teacher-section-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .teacher-review-editor{grid-template-columns:1fr 1fr}
  .teacher-review-comment{grid-column:1/-1}
}
@media(max-width:760px){
  .student-evaluation-head{align-items:stretch}
  .student-evaluation-score{min-width:74px;font-size:20px}
  .leaderboard-head{flex-direction:column;align-items:flex-start}
  .leaderboard-table{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:3px}
  .leaderboard-row{min-width:690px}
  .teacher-student-head{flex-direction:column}
  .teacher-student-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .teacher-section-grid{grid-template-columns:1fr}
  .teacher-review-editor{grid-template-columns:1fr}
  .teacher-review-comment,.teacher-release-check{grid-column:1}
  .teacher-release-check{display:flex!important}
  .teacher-review-editor .primary{width:100%}
}
@media(max-width:430px){
  .student-evaluation-card,.teacher-student-card{padding:12px}
  .student-evaluation-head{flex-direction:column}
  .student-evaluation-score{width:max-content;min-width:0;min-height:0}
  .teacher-student-metrics{grid-template-columns:1fr 1fr}
}


/* v2.3.65 · student/parent profile + avatar + 2-device SGK access */
.topbar{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
#coursePill{margin-right:auto}
.vnn-sgk-profile-button{
  display:flex;
  align-items:center;
  gap:9px;
  min-width:0;
  max-width:280px;
  min-height:46px;
  padding:6px 10px 6px 7px;
  border:1px solid #c9ddd5;
  border-radius:999px;
  background:#fff;
  color:#174f43;
  cursor:pointer;
}
.vnn-sgk-profile-button.hidden{display:none!important}
.vnn-sgk-profile-button>span:last-child{display:grid;min-width:0;text-align:left}
.vnn-sgk-profile-button b{
  max-width:190px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  font-size:13.5px;
}
.vnn-sgk-profile-button small{font-size:10.5px;color:#6d827b}
.vnn-sgk-avatar,
.vnn-sgk-avatar-fallback{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  overflow:hidden;
  border-radius:50%;
  background:#dff1e9;
  color:#176554;
  object-fit:cover;
  font-weight:900;
  box-shadow:0 0 0 1px rgba(23,101,84,.12);
}
.vnn-sgk-avatar.mini,.vnn-sgk-avatar-fallback.mini{width:34px;height:34px;font-size:14px}
.vnn-sgk-avatar.large,.vnn-sgk-avatar-fallback.large{width:96px;height:96px;font-size:34px}
.vnn-sgk-avatar.leaderboard,.vnn-sgk-avatar-fallback.leaderboard{width:38px;height:38px;font-size:15px}

.vnn-sgk-profile-overlay{
  position:fixed;
  inset:0;
  z-index:99999;
  display:grid;
  place-items:center;
  padding:16px;
}
.vnn-sgk-profile-overlay.hidden{display:none!important}
.vnn-sgk-profile-backdrop{
  position:absolute;
  inset:0;
  background:rgba(9,38,31,.52);
  backdrop-filter:blur(3px);
}
.vnn-sgk-profile-modal{
  position:relative;
  z-index:1;
  width:min(760px,100%);
  max-height:min(88vh,820px);
  overflow:auto;
  border-radius:22px;
  background:#fff;
  border:1px solid #d8e5e0;
  box-shadow:0 24px 70px rgba(12,54,44,.22);
}
.vnn-sgk-profile-head{
  display:flex;
  justify-content:space-between;
  gap:14px;
  align-items:flex-start;
  padding:20px 20px 10px;
}
.vnn-sgk-profile-head h2{margin:8px 0 0}
.vnn-sgk-profile-close{
  width:42px;height:42px;border-radius:50%;
  border:1px solid #d8e5e0;background:#fff;font-size:24px;cursor:pointer;
}
.vnn-sgk-profile-body{
  display:grid;
  grid-template-columns:180px minmax(0,1fr);
  gap:22px;
  padding:12px 20px 18px;
}
.vnn-sgk-profile-avatar-wrap{
  display:grid;
  justify-items:center;
  align-content:start;
  gap:10px;
  min-width:0;
}
.vnn-sgk-avatar-upload{
  position:relative;
  overflow:hidden;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.vnn-sgk-avatar-upload input{
  position:absolute;inset:0;opacity:0;cursor:pointer;
}
.vnn-sgk-profile-avatar-wrap>small{font-size:11.5px;color:#71857f;text-align:center}
.vnn-sgk-profile-fields{display:grid;gap:12px}
.vnn-sgk-profile-fields label{display:grid;gap:5px}
.vnn-sgk-profile-fields label>span{font-size:12.5px;font-weight:850;color:#506c64}
.vnn-sgk-profile-fields label>small{font-size:11.5px;color:#71857f}
.vnn-sgk-profile-readonly{
  display:grid;
  gap:4px;
  padding:12px 13px;
  border-radius:13px;
  background:#f3f8f6;
  border:1px solid #dbe8e3;
}
.vnn-sgk-profile-readonly span{font-size:13px;color:#315f54}
.vnn-sgk-profile-readonly small{font-size:11.5px;color:#6d817a}
.vnn-sgk-profile-note{
  margin:0 20px 16px;
  padding:12px 14px;
  border-radius:13px;
  background:#fff8e8;
  border:1px solid #ecdcb7;
  color:#725a25;
  font-size:13px;
  line-height:1.55;
}
.vnn-sgk-profile-actions{
  display:flex;
  align-items:center;
  gap:10px;
  padding:14px 20px 20px;
  border-top:1px solid #e2ebe7;
}
.vnn-sgk-profile-actions #vnnSgkProfileMessage{
  flex:1;
  min-width:0;
  font-size:12px;
  color:#176554;
  font-weight:800;
}

.leaderboard-person{
  display:flex;
  align-items:center;
  gap:9px;
  min-width:0;
}
.leaderboard-person .leaderboard-name{min-width:0}

.teacher-review-actions{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
}
.teacher-review-actions .primary,
.teacher-review-actions .ghost{min-height:44px}

@media(max-width:760px){
  .topbar{align-items:stretch}
  #coursePill{order:3;width:100%;margin-right:0}
  .vnn-sgk-profile-button{
    margin-left:auto;
    max-width:210px;
    min-height:44px;
  }
  .vnn-sgk-profile-button b{max-width:125px;font-size:12.5px}
  .vnn-sgk-profile-button small{font-size:9.5px}
  .vnn-sgk-profile-body{grid-template-columns:1fr;padding:10px 14px 14px}
  .vnn-sgk-profile-head{padding:16px 14px 8px}
  .vnn-sgk-profile-note{margin:0 14px 12px}
  .vnn-sgk-profile-actions{padding:12px 14px 16px;flex-wrap:wrap}
  .vnn-sgk-profile-actions #vnnSgkProfileMessage{order:3;flex-basis:100%}
  .vnn-sgk-avatar.large,.vnn-sgk-avatar-fallback.large{width:82px;height:82px}
  .leaderboard-row{grid-template-columns:48px minmax(180px,1.5fr) repeat(3,minmax(92px,.7fr))}
}
@media(max-width:430px){
  .vnn-sgk-profile-button>span:last-child small{display:none}
  .vnn-sgk-profile-button{max-width:165px;padding-right:8px}
  .vnn-sgk-profile-button b{max-width:100px}
  .vnn-sgk-profile-modal{border-radius:18px}
  .vnn-sgk-profile-actions .primary,
  .vnn-sgk-profile-actions .ghost{flex:1 1 140px}
}


/* v2.3.67 · student-only lesson scope simplification + mission guide */
#tabs.tabs button.student-scope-hidden{
  display:none!important;
}

.lesson-mission-guide{
  margin:12px 0 14px;
  padding:16px;
  border:1px solid #c9ddd5;
  border-radius:17px;
  background:linear-gradient(145deg,#f7fcfa,#eef8f4);
  box-shadow:0 7px 20px rgba(24,87,72,.045);
}
.lesson-mission-guide.hidden{display:none!important}
.lesson-mission-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px;
  margin-bottom:12px;
}
.lesson-mission-head h3{
  margin:7px 0 4px;
  color:#173f36;
  font-size:21px;
}
.lesson-mission-head p{
  margin:0;
  color:#5f766f;
  font-size:14px;
  line-height:1.55;
}
.lesson-mission-count{
  flex:0 0 auto;
  padding:7px 10px;
  border-radius:999px;
  background:#fff;
  border:1px solid #d2e3dd;
  color:#176554;
  font-size:12px;
  font-weight:900;
}
.lesson-mission-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:9px;
}
.lesson-mission-step{
  display:grid;
  grid-template-columns:34px 36px minmax(0,1fr) auto;
  gap:9px;
  align-items:center;
  min-width:0;
  min-height:72px;
  padding:10px 11px;
  border:1px solid #d7e5e0;
  border-radius:13px;
  background:#fff;
  color:#24473f;
  cursor:pointer;
  text-align:left;
}
.lesson-mission-step:hover{
  border-color:#97c8b9;
  background:#f9fdfb;
  transform:translateY(-1px);
}
.lesson-mission-no{
  display:grid;
  place-items:center;
  width:30px;
  height:30px;
  border-radius:50%;
  background:#176f61;
  color:#fff;
  font-size:13px;
  font-weight:900;
}
.lesson-mission-icon{font-size:22px;text-align:center}
.lesson-mission-copy{
  display:grid;
  gap:3px;
  min-width:0;
}
.lesson-mission-copy b{
  color:#173f36;
  font-size:14.5px;
  line-height:1.3;
  overflow-wrap:anywhere;
}
.lesson-mission-copy small{
  color:#667b74;
  font-size:12px;
  line-height:1.4;
  overflow-wrap:anywhere;
}
.lesson-mission-go{
  color:#176554;
  font-size:11.5px;
  font-weight:900;
  white-space:nowrap;
}
.lesson-mission-mobile-hint{
  margin-top:10px;
  padding-top:9px;
  border-top:1px dashed #cfdfda;
  color:#647a73;
  font-size:12px;
  line-height:1.45;
}

@media(min-width:1000px){
  .lesson-mission-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:760px){
  .lesson-mission-guide{
    margin:10px 0 12px;
    padding:12px;
    border-radius:14px;
  }
  .lesson-mission-head{
    flex-direction:column;
    gap:8px;
  }
  .lesson-mission-head h3{font-size:19px}
  .lesson-mission-head p{font-size:13.5px}
  .lesson-mission-grid{grid-template-columns:1fr}
  .lesson-mission-step{
    grid-template-columns:32px 32px minmax(0,1fr) auto;
    min-height:68px;
    padding:9px 10px;
  }
  .lesson-mission-copy b{font-size:14.5px}
  .lesson-mission-copy small{font-size:12.5px}
  .lesson-mission-go{font-size:11px}
  .lesson-mission-mobile-hint{
    font-size:12.5px;
    font-weight:700;
    color:#46665d;
  }
}
@media(max-width:430px){
  .lesson-mission-step{
    grid-template-columns:30px 30px minmax(0,1fr);
  }
  .lesson-mission-go{
    grid-column:3;
    justify-self:start;
    margin-top:2px;
  }
  .lesson-mission-no{width:28px;height:28px}
  .lesson-mission-icon{font-size:20px}
}


/* v2.3.69 · official Unit/Lesson course mode + previous/next Lesson navigation */
.lesson-official-nav{
  display:grid;
  grid-template-columns:minmax(140px,1fr) minmax(220px,1.35fr) minmax(140px,1fr);
  gap:10px;
  align-items:stretch;
  margin:12px 0 14px;
  padding:10px;
  border:1px solid #cfe0da;
  border-radius:15px;
  background:#f8fbfa;
}
.lesson-nav-btn{
  min-width:0;
  min-height:48px;
  padding:9px 13px;
  border:1px solid #c8dcd5;
  border-radius:12px;
  background:#fff;
  color:#155f52;
  font-weight:900;
  font-size:14px;
  cursor:pointer;
}
.lesson-nav-btn.prev{text-align:left}
.lesson-nav-btn.next{text-align:right}
.lesson-nav-btn:not(:disabled):hover{
  background:#eaf7f2;
  border-color:#8fc5b5;
}
.lesson-nav-btn:disabled{
  cursor:not-allowed;
  opacity:.5;
  background:#f2f5f4;
  color:#7a8b85;
}
.lesson-nav-current{
  display:grid;
  place-items:center;
  min-width:0;
  padding:7px 10px;
  border-radius:12px;
  background:#176f61;
  color:#fff;
  text-align:center;
}
.lesson-nav-current small{
  display:block;
  font-size:11px;
  font-weight:800;
  letter-spacing:.03em;
  opacity:.8;
}
.lesson-nav-current b{
  display:block;
  max-width:100%;
  margin-top:3px;
  font-size:15.5px;
  line-height:1.3;
  overflow-wrap:anywhere;
}

@media(min-width:1200px){
  .lesson-official-nav{grid-template-columns:minmax(170px,1fr) minmax(300px,1.45fr) minmax(170px,1fr)}
  .lesson-nav-btn{font-size:16px;min-height:52px}
  .lesson-nav-current small{font-size:12px}
  .lesson-nav-current b{font-size:18px}
}
@media(max-width:760px){
  .lesson-official-nav{
    grid-template-columns:1fr 1.25fr 1fr;
    gap:6px;
    padding:7px;
    margin:9px 0 11px;
  }
  .lesson-nav-btn{
    min-height:44px;
    padding:7px 8px;
    font-size:12.5px;
    line-height:1.25;
  }
  .lesson-nav-current{padding:6px 7px}
  .lesson-nav-current small{font-size:9.5px}
  .lesson-nav-current b{font-size:13.5px}
}
@media(max-width:430px){
  .lesson-official-nav{
    grid-template-columns:1fr 1.18fr 1fr;
    gap:5px;
    padding:6px;
  }
  .lesson-nav-btn{font-size:11.5px;padding:6px}
  .lesson-nav-current small{font-size:8.8px}
  .lesson-nav-current b{font-size:12.5px}
}


/* v2.3.70 · Answer Questions validation */
#activityInput.answer-invalid{
  border-color:#d06b57!important;
  background:#fff7f4!important;
  box-shadow:0 0 0 3px rgba(208,107,87,.10)!important;
}
.open-answer-hint,
.open-answer-frame{
  display:inline-block;
  margin-top:6px;
  line-height:1.5;
}
.open-answer-hint{color:#8a5a10}
.open-answer-frame{
  padding:6px 8px;
  border-radius:8px;
  background:#fff7dc;
  color:#765914;
}
#activityFb small{
  display:inline-block;
  margin-top:7px;
  line-height:1.45;
}
@media(max-width:760px){
  .inline-answer{
    display:grid!important;
    grid-template-columns:1fr!important;
    gap:8px!important;
  }
  .inline-answer .primary{width:100%}
}


/* v2.3.71 · multi-grade SGK: Grade 3/4 kid-safe touch scale + grade lock state */
.grade-btn.vnn-managed-grade-locked{
  opacity:.45!important;
  filter:grayscale(.25);
  cursor:not-allowed!important;
}
html[data-sgk-grade="3"] .lesson-map button,
html[data-sgk-grade="4"] .lesson-map button{
  min-height:92px;
}
html[data-sgk-grade="3"] .lesson-map button b,
html[data-sgk-grade="4"] .lesson-map button b{
  font-size:17px;
  line-height:1.35;
}
html[data-sgk-grade="3"] .lesson-map button small,
html[data-sgk-grade="4"] .lesson-map button small{
  font-size:13.5px;
  line-height:1.45;
}
html[data-sgk-grade="3"] .activity-tile,
html[data-sgk-grade="4"] .activity-tile{
  min-height:118px;
}
html[data-sgk-grade="3"] .activity-copy b,
html[data-sgk-grade="4"] .activity-copy b{
  font-size:16px;
}
html[data-sgk-grade="3"] .lesson-mission-step,
html[data-sgk-grade="4"] .lesson-mission-step{
  min-height:78px;
}
html[data-sgk-grade="3"] .lesson-mission-copy b,
html[data-sgk-grade="4"] .lesson-mission-copy b{
  font-size:15.5px;
}
html[data-sgk-grade="8"] .lesson-mission-copy b{font-size:14.5px}
.multigrade-dialogue .communication-line-play{min-height:40px}

@media(max-width:760px){
  html[data-sgk-grade="3"] .grade-picker,
  html[data-sgk-grade="4"] .grade-picker{
    gap:7px;
  }
  html[data-sgk-grade="3"] .lesson-map button,
  html[data-sgk-grade="4"] .lesson-map button{
    min-height:88px;
    padding:11px;
  }
  html[data-sgk-grade="3"] .activity-grid,
  html[data-sgk-grade="4"] .activity-grid{
    grid-template-columns:1fr;
  }
  html[data-sgk-grade="3"] .activity-tile,
  html[data-sgk-grade="4"] .activity-tile{
    min-height:96px;
  }
}


/* v2.3.87 · Grade 8 shared-module parity with Grade 6.
   Structural only: compact bilingual Reading/Writing layout + generic reading width fix. */
.reading-feature.multigrade-reading{
  display:block!important;
  grid-template-columns:minmax(0,1fr)!important;
  width:100%;
  min-width:0;
}
.reading-feature.multigrade-reading p{
  width:100%;
  max-width:none;
  min-width:0;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:12px;
  align-items:start;
  padding:14px;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-en,
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-vi{
  min-width:0;
  margin:0;
  padding:14px 15px;
  border:1px solid #d9e4df;
  border-radius:12px;
  background:#fff;
  line-height:1.72;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-en{
  color:#36576b;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-vi{
  color:#2f7563;
  border-top:1px solid #d9e4df;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair .reading-column-title{
  display:flex;
  align-items:center;
  gap:7px;
  margin:0 0 9px;
  font-weight:900;
  font-size:15px;
  line-height:1.3;
  color:#174f43;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair .reading-translation-title{
  color:#17695b;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair .reading-translation-body{
  font-size:16px;
  line-height:1.72;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair .reading-feature.multigrade-reading{
  margin:0;
  padding:0;
  border:0!important;
  background:transparent!important;
}
html[data-sgk-grade="8"] .reading-box.grade8-reading-pair .reading-feature.multigrade-reading p::before{
  display:none!important;
}
html[data-sgk-grade="8"] .prompt-grid{
  grid-template-columns:1fr;
}
html[data-sgk-grade="8"] .writing-prompt-bi{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:10px 14px;
  align-items:start;
}
html[data-sgk-grade="8"] .writing-prompt-bi>div,
html[data-sgk-grade="8"] .writing-prompt-bi>small{
  min-width:0;
  margin:0;
  font-size:15px;
  line-height:1.5;
}
@media(min-width:760px){
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair.translation-open{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
@media(max-width:759px){
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair{
    padding:10px;
    gap:9px;
  }
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-en,
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-vi{
    padding:12px;
  }
  html[data-sgk-grade="8"] .writing-prompt-bi{
    grid-template-columns:1fr;
    gap:5px;
  }
}
@media(min-width:1200px){
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-en,
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair>.reading-vi,
  html[data-sgk-grade="8"] .reading-box.grade8-reading-pair .reading-translation-body{
    font-size:17px;
  }
}


/* v2.3.123 · real vocabulary images must render alone */
.sgk-3d-visual.real>.v3d-back,
.sgk-3d-visual.real>.v3d-orb,
.sgk-3d-visual.real>.v3d-floor,
.sgk-3d-visual.real>.visual-glow{display:none!important}
.sgk-3d-visual.real>img{
  position:absolute!important;
  inset:0!important;
  width:100%!important;
  height:100%!important;
  object-fit:cover!important;
  object-position:center!important;
  border-radius:inherit!important;
  z-index:5!important;
  margin:0!important;
  transform:none!important
}


/* v2.2.77 · vocab card containment: speaker buttons must stay inside the card at every width.
   Root cause: .vocab-copy is display:grid with implicit auto tracks, so audio rows sized to
   max-content and overflowed the card (measured 60px past the right edge on 'do housework'). */
.vocab-copy{grid-template-columns:minmax(0,1fr);}
.vocab-term-audio-row,.vocab-example-audio-row{max-width:100%;}
.vocab-term-audio-row .vocab-en,.vocab-example-audio-row>div{min-width:0;flex-wrap:wrap;row-gap:2px;}
.vocab-icon-listen{flex:0 0 38px;}

/* v2.2.78 · mobile tool/filter strips: wrap instead of clipped horizontal scroll.
   Measured at 390px: the ≤700px nowrap rule cut the rightmost speed chip
   ('Vừa · 0.90×') at the strip edge; .filters had the same clipped-scroll pattern. */
@media(max-width:700px){
 .voice-tools{flex-wrap:wrap;overflow-x:visible;}
 .filters{flex-wrap:wrap;overflow-x:visible;}
}

/* v2.2.79 · cue-capable chant lines (G3 U3 phonics "Is that Mai?"): compact tap-to-replay rows, not dialogue cards. */
.pronunciation-chant .chant-cue-lines{display:block;margin-top:8px}
.pronunciation-chant .chant-line{display:block;padding:6px 10px;margin:4px 0;border-radius:9px;background:transparent;border:1px solid transparent;color:#274a42;font-weight:700;cursor:pointer;transition:.18s ease}
.pronunciation-chant .chant-line:hover,.pronunciation-chant .chant-line:focus-visible{background:#fff;border-color:#dfebe7}
.pronunciation-chant .chant-line.karaoke-active{background:#effbf6;border-color:#39a889;transform:none;box-shadow:none}
.pronunciation-chant .chant-line.karaoke-done{color:#4f766b}

/* v2.2.80 · long official-audio labels (song card "Audio bài hát Sách Mềm ... Track 28") wrap on narrow screens instead of clipping. */
@media(max-width:720px){.official-audio-wrap b{white-space:normal;line-height:1.4}}

/* v2.2.81 · distinguish official-audio cue rows (▶ play glyph + tooltip) from TTS speaker buttons. */
.cue-play-glyph{color:#129184;font-size:.8em;margin-right:3px}
.pronunciation-chant .chant-line .cue-play-glyph{font-size:12px}

/* v2.2.82 · cue play glyph must stay inline inside chant rows (.dialogue-line span rule sets block). */
.pronunciation-chant .chant-line .cue-play-glyph{display:inline}