/* Study Studio: static learning surfaces with shared avatar color accents. */
:root{color-scheme:dark;--ink:#ecf7f3;--muted:#a5bfb6;--line:#92e1b523;--panel:#12362c;--green:#63e7b0;--violet:#b7a1ff}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 12% 0,#164b3a 0,transparent 48%),radial-gradient(ellipse at 98% 15%,#30365758 0,transparent 45%),#091d18;color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:14px;line-height:1.65}body::before,body::after{display:none}
a{color:#9ceccc}h1,h2,h3,h4{color:#f1fcf5;letter-spacing:-.025em}h1{font-size:clamp(26px,3vw,36px);line-height:1.22}h2{font-size:23px}p,small{color:inherit}.muted{color:var(--muted)}main{max-width:1180px;margin:auto;padding:32px 28px 64px}footer{color:#9bb9aa;border-top:1px solid var(--line);max-width:1124px;margin:0 auto;padding:24px;text-align:center;font-size:12px}
.topbar{position:relative;top:auto;margin:0;max-width:none;border:0;border-bottom:1px solid var(--line);border-radius:0;background:#0a241de8;box-shadow:none;padding:17px max(24px,calc((100vw - 1124px)/2));gap:24px;backdrop-filter:none}.topbar .brand{color:#eaf9f1;gap:12px}.brand-logo{width:38px;height:38px}.brand small{color:#96b7a5;font-size:11px}.topbar>.row{flex-wrap:nowrap;gap:15px}.topbar>.row>a{font-size:12px;color:#9cc2b3;padding:0;background:none}.topbar #identity{font-size:12px;max-width:210px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#identity-avatar .tcx-avatar{width:60px;height:60px}.topbar #logout{padding:8px 12px;font-size:12px}
.card,.auth-card,.learning-preview,.question,.exam-layout>aside,#result-score{border:1px solid var(--line);border-radius:16px;background:linear-gradient(135deg,#153a2e,#102d27);box-shadow:0 14px 36px #020d1022;padding:24px;animation:none}.card::before,.auth-card::before{display:none}.view,.scene-enter{animation:none}.eyebrow{font-size:10px;font-weight:800;letter-spacing:.16em;color:#8dd7b2;text-transform:uppercase}
.welcome{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,1fr);align-items:center;gap:48px}.welcome>.intro{padding:16px 0;background:none;border:0;box-shadow:none}.welcome>.intro h1{font-size:clamp(32px,3.6vw,48px);line-height:1.15;margin:17px 0 22px;max-width:570px}.welcome>.intro>p{max-width:550px;font-size:15px;color:#b3ccbd}.chips{gap:9px;flex-wrap:wrap;margin:24px 0}.chips span{padding:5px 11px;border:1px solid #6ecfa73b;border-radius:7px;background:#62d49b0c;color:#bcefd2;font-size:12px}.chips span:nth-child(2){border-color:#b4a0ff3c;color:#ccc1ff;background:#b4a0ff0b}.auth-card{padding:32px;background:linear-gradient(140deg,#193f32,#112b25);border-color:#8adbb440;box-shadow:0 24px 60px #0003}.auth-kicker{font-size:10px;color:#98bcaa;letter-spacing:.1em;margin:0 0 18px}.auth-card h2{font-size:25px}.auth-card .row{justify-content:space-between}.auth-card input{margin-top:8px}label{color:#c8ded0;font-size:13px}input,select,textarea{background:#09271f;color:#effbf2;border:1px solid #81bba83a;border-radius:10px;box-shadow:none;padding:11px 13px;font:inherit}input::placeholder,textarea::placeholder{color:#86a99a}input:focus-visible,select:focus-visible,textarea:focus-visible,button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid #72e9bb;outline-offset:3px}button,.button{font:inherit;border-radius:10px;box-shadow:none}.quiet{color:#c2e2d2;background:#1e4537;border:1px solid #7aa88f36;padding:9px 14px}.quiet:hover:not(:disabled){background:#295846;border-color:#9dd5b750;transform:none}.primary{background:linear-gradient(135deg,#74e5b5,#43bc8b);border:1px solid #a3edc452;color:#06261b;box-shadow:0 4px 12px #36ad7530;font-weight:750;padding:10px 16px}.primary:hover:not(:disabled){background:linear-gradient(135deg,#8bedc4,#60d9a5);transform:none}.primary:disabled,.quiet:disabled{opacity:.45;color:inherit;box-shadow:none}.wide{width:100%}
.tabs{position:relative;top:auto;display:flex;gap:6px;flex-wrap:wrap;overflow:visible;padding:7px;background:#102d24;border:1px solid var(--line);border-radius:13px;box-shadow:none;margin:0 0 32px}.tabs button{flex:1;min-width:90px;padding:10px 14px;color:#a5c5b4;background:transparent;border:0;border-radius:8px;white-space:nowrap;font-size:13px}.tabs .selected{background:#2e694d;color:#eaffee;border:0;box-shadow:inset 0 0 0 1px #84dca142}.tabs button:hover:not(.selected){background:#c0ffda0a;color:#e9fff0}
.section-head,#view-practice>.section-head{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:0;margin:0 0 28px;background:none;border:0;box-shadow:none}.section-head h1{margin:6px 0}.quota.card{flex:none;padding:14px 18px;border-radius:12px;background:#174533;box-shadow:none;border:1px solid #80e1ab29;text-align:right}.quota strong{font-size:14px;font-weight:700;color:#a4f1c8}.quota small{display:block;font-size:11px;color:#8cb9a0;margin-top:3px}.notice,#week-note{padding:11px 15px;margin:0 0 28px;border:1px solid var(--line);border-radius:9px;background:#c1ffdb05;color:#9bbca8;font-size:12px}.notice:before{display:none}
#banks{display:grid;grid-template-columns:minmax(0,2fr) minmax(230px,1fr);gap:24px;align-items:start}.program-panel{border:1px solid #82cda433;border-radius:20px;padding:25px;background:linear-gradient(145deg,#153f2e,#103025);box-shadow:0 20px 42px #00140d26}.ielts-panel{background:linear-gradient(145deg,#233b39,#202c3a);border-color:#b59cf143}.program-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.program-head h2{font-size:24px;margin:4px 0 0}.program-quota{font-size:12px;font-weight:700;color:#a3f3c6;white-space:nowrap;padding:5px 9px;background:#78eba919;border:1px solid #8df2b738;border-radius:7px}.ielts-panel .program-quota{color:#d1c4ff;background:#a791fc17;border-color:#ab99ed35}.ielts-panel .eyebrow{color:#c4b2ff}.program-description{font-size:12px;color:#aac9b7;margin:16px 0 22px}.ielts-panel .program-description{color:#b7c3d4}.bank-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.ielts-panel .bank-grid{grid-template-columns:1fr}.bank-grid>.card{min-width:0;padding:17px 14px;border:1px solid #83cead2a;background:#c5ffe006;border-radius:12px;box-shadow:none}.bank-grid>.card:hover{background:#baffdb0c;border-color:#83cead55;transform:none;box-shadow:none}.bank-top{display:flex;align-items:center;gap:9px}.bank-top h3{font-size:16px;margin:0;letter-spacing:0}.bank-icon{display:grid;place-items:center;width:30px;height:30px;flex:none;font-size:17px;font-weight:700;color:#93e7b2;background:#65dfa412;border:1px solid #7bddad29;border-radius:7px}.bank-metadata{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0 4px}.bank-metadata span{font-size:10px;padding:0;color:#b4d1bf;background:none;border:0}.bank-grid small{display:block;font-size:10px;margin:0 0 15px}.bank-grid .primary{font-size:11px;padding:7px 8px;border-radius:7px}.ielts-panel .bank-icon{color:#c0aaf8;background:#b09ceb16;border-color:#b09ceb34}.ielts-panel .primary{background:linear-gradient(130deg,#c7bcff,#a998e3);border-color:#e4d6ff4d;color:#25223f}.ielts-panel .bank-grid>.card{padding:22px}.ielts-panel .bank-top h3{font-size:25px}.ielts-panel .bank-icon{width:40px;height:40px;font-size:20px}.ielts-panel .bank-metadata{margin-top:24px}.ielts-panel .bank-metadata span{font-size:12px}.ielts-panel .bank-grid small{margin-bottom:24px}.ielts-panel .primary{font-size:13px;padding:10px}
.learning-preview{margin-top:28px;padding:18px;border-color:#76c69d30;background:#15382b;box-shadow:none}.lesson-preview-head{display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:16px}.lesson-preview-head>span{font-size:9px;font-weight:700;letter-spacing:.13em;color:#a0dfb6}.lesson-preview-head small{font-size:10px;color:#a0bba9}.preview-row{display:grid;grid-template-columns:92px minmax(0,1fr) 44px;gap:15px;align-items:start}.preview-row .lesson-image{padding:0;overflow:hidden;border:1px solid #75b58d3d;border-radius:9px;background:#092319;box-shadow:none}.lesson-image img{display:block;width:100%;height:118px;object-fit:cover}.lesson-image-caption{display:block;font-size:8px;color:#a6c4ae;padding:7px 4px}.preview-row h2{font-size:20px;color:#eaffec;margin:0 0 8px}.preview-row p{font-size:11px;color:#bcd4c2;margin:6px 0}.preview-row em{font-size:11px;color:#9fe7bf}.lesson-audio{display:flex;flex-direction:column;gap:7px}.lesson-audio button{padding:6px 3px;border:1px solid #82c99c31;border-radius:8px;background:#1f4b36;color:#b6ebc4;box-shadow:none;font-size:10px}.lesson-audio b{display:block;font-size:15px}.lesson-audio button[aria-pressed=true]{background:#3b6658;border-color:#b2efc84d}
#board,#history{padding:22px;margin-top:20px}.empty{text-align:center;color:#9ebcab;padding:28px}table{color:#d1e6d8}th{color:#9abdac;background:#baffdc06;border-color:var(--line);font-size:11px}td{border-color:var(--line);font-size:12px}tr:hover td{background:#c5ffe006}.table-scroll{overflow:auto}.rank{background:#2d513c;color:#cdeed7}.rank-1{background:#736128;color:#ffdf7c}.rank-2{background:#3b5060;color:#d9eafa}.rank-3{background:#674b38;color:#fbd0ab}
#rewards,#events,#frame-how,#effect-catalog{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:18px}.reward-card,.effect-mini{padding:25px 18px;border:1px solid #8dbdb22c;border-radius:16px;background:linear-gradient(145deg,#153d33,#142c2f);text-align:center;box-shadow:none}.reward-card h2{font-size:17px;margin-top:24px}.reward-card h3{font-size:15px}.reward-card p{font-size:12px;color:#aac8b9}.reward-card small{color:#91b3a0;font-size:11px}.reward-card .primary{font-size:12px;margin-top:15px}.reward-card .tcx-avatar{width:132px;height:132px}#view-rewards>details{border:1px solid var(--line);border-radius:14px;padding:18px;margin-top:26px;background:#12332a}summary{cursor:pointer;color:#c1ecd2;font-weight:600}details>p{font-size:12px;color:#a3c3b0}#frame-how .reward-card .tcx-avatar{width:108px;height:108px}#frame-how p{text-align:left}
.account-grid{gap:20px}.account-field{border-color:var(--line)}.account-field strong{color:#ccebd7}.message{border:1px solid var(--line);background:#12362b;border-radius:14px;margin-top:18px}#community-form p{font-size:12px;color:#a6c9b4}.public-identity small{color:#a2c3b0}.chat-bubble{background:#1c4435}.chat-bubble.own{background:#295a47}.chat-bubble.flagged{background:#5c252c;color:#ffe0e2}
dialog,.comments-dialog{background:#15342a;color:#e0f6e7;border:1px solid #98d5b440;border-radius:18px}dialog::backdrop{background:#031510cf}.reward-dialog{background:#0b241f}.exam-bar{background:#102d24;border:1px solid var(--line);box-shadow:none}.exam-layout>aside,.question{background:#12362c}.question-nav button{background:#234c39;border:1px solid #7bb39732;color:#c7e4d2}.question-nav .answered{background:#2a7050;color:#cbffe3}.question-nav .current{background:#90efba;color:#0b2d1b;outline:2px solid #c9ffd0}.passage{background:#09271d;border-color:var(--line);color:#cde5d5}.option{background:#1b4130;border:1px solid #80c89c36;color:#def0e3;box-shadow:none}.option-letter{background:#335c40;color:#d6eedc}.option.chosen{background:#2e7250;border-color:#9ee7b6;box-shadow:none}.option.chosen .option-letter{background:#9cefba;color:#123521}.score strong{color:#94edb8}#toast{background:#2a664b;color:#e5ffed;border:1px solid #a8e6bc50}.correct{color:#92e8b1}.incorrect{color:#ff9ca6}.review-option.correct{background:#144e30;color:#b9f5cc}.review-option.incorrect{background:#502c2c;color:#ffd0d0}.admin-grid .card,.admin-grid{color:var(--ink)}.check input{accent-color:#77dfac}.social-stack{color:#b3ccbd}
@media(min-width:1000px){.topbar{min-height:88px}.topbar #identity-avatar{margin-left:5px}.ielts-panel{position:sticky;top:24px}}
@media(max-width:900px){.welcome{grid-template-columns:1fr;gap:30px}.welcome>.intro{padding:0}.welcome>.intro h1{font-size:38px}.auth-card{max-width:550px;width:100%;margin:0 auto}#banks{grid-template-columns:1fr}.ielts-panel{position:static}.ielts-panel .bank-grid>.card{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:12px}.ielts-panel .bank-top{grid-row:span 3}.ielts-panel .bank-metadata{margin:0}.ielts-panel .bank-grid small{margin:0}.ielts-panel .primary{margin:0}.topbar{padding:15px 24px;gap:14px}.topbar #identity{display:none}}
@media(max-width:600px){main{padding:25px 16px 40px}.topbar{padding:12px 16px;flex-wrap:nowrap;gap:12px}.topbar .brand{flex:1;font-size:12px;gap:8px}.brand-logo{width:29px;height:29px}.brand small{font-size:9px}.topbar>.row{gap:11px;flex:none}.topbar>.row>a{display:none}.topbar #logout{font-size:10px;padding:6px 8px}#identity-avatar .tcx-avatar{width:51.6px;height:51.6px}.tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;padding:6px;margin-bottom:27px;border-radius:12px}.tabs button{min-width:0;font-size:11px;padding:9px 5px;flex:none}.section-head,#view-practice>.section-head{display:block;margin-bottom:20px}.section-head h1{font-size:28px}.quota.card{margin-top:18px;text-align:left;padding:10px 13px;display:flex;flex-wrap:wrap;gap:3px 16px;align-items:center}.quota strong{font-size:12px}.quota small{font-size:10px}.program-panel{padding:19px 15px;border-radius:16px}.program-head h2{font-size:23px}.program-head .eyebrow{font-size:9px}.program-quota{font-size:11px}.program-description{margin:13px 0 18px;font-size:11px}.bank-grid{gap:9px}.bank-grid>.card{padding:13px 9px;border-radius:10px}.bank-top{gap:6px}.bank-top h3{font-size:13px}.bank-icon{width:23px;height:23px;font-size:14px}.bank-metadata{margin:12px 0 3px;gap:5px}.bank-metadata span,.bank-grid small{font-size:9px}.bank-grid .primary{font-size:10px;padding:7px 4px}.ielts-panel .bank-grid>.card{padding:17px 14px}.ielts-panel .bank-top h3{font-size:23px}.ielts-panel .bank-metadata span{font-size:11px}.ielts-panel .primary{font-size:11px}.notice,#week-note{font-size:10px;padding:9px 12px;margin-bottom:21px}.welcome>.intro h1{font-size:34px;margin:13px 0 20px}.welcome>.intro>p{font-size:13px}.auth-card{padding:24px}.learning-preview{padding:13px}.preview-row{grid-template-columns:73px minmax(0,1fr) 36px;gap:10px}.lesson-image img{height:109px}.preview-row h2{font-size:18px}.preview-row p,.preview-row em{font-size:10px}.lesson-audio button{font-size:9px;padding:5px 2px}.lesson-image-caption{font-size:7px}#rewards,#frame-how,#events,#effect-catalog{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.reward-card{padding:22px 13px}.reward-card h2{font-size:14px}.reward-card p{font-size:11px}.reward-card .tcx-avatar{width:120px;height:120px}.card{padding:20px;border-radius:14px}.exam-layout{grid-template-columns:1fr}.topbar .tcx-avatar-letter{font-size:15px}footer{font-size:10px;padding:20px 16px}}
@media(max-width:355px){.bank-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand small{display:none}.topbar .brand{font-size:11px}.topbar #logout{font-size:9px}.bank-grid>.card{padding:13px}.preview-row{grid-template-columns:65px minmax(0,1fr) 33px}}
@media(prefers-reduced-motion:reduce){.view,.scene-enter,.card{animation:none!important}.primary,.quiet,.card{transition:none!important}}
@media(forced-colors:active){body,.card,.topbar,.tabs,.program-panel,.quiet,.option,.quota.card{background:Canvas;color:CanvasText;border:1px solid CanvasText}.primary,.tabs .selected{background:Highlight;color:HighlightText}h1,h2,h3,p,small,.muted,.eyebrow{color:CanvasText}}

/* Image-led lesson cards requested by the owner; all speech buttons retained. */
.topbar{width:100%}.primary{min-height:0}.bank-icon{box-shadow:none}.grid .reward-card,#events>.card,#effect-catalog>.effect-mini{background:linear-gradient(145deg,#152330,#0a1820);border:1px solid #5b79963b;box-shadow:none}.reward-card .primary{margin-bottom:0}.reference-lessons{margin-top:46px}.reference-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.reference-heading h2{font-size:28px;margin:8px 0}.reference-heading p{max-width:320px;font-size:12px;color:#a7c6b6}.learning-world-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.learning-world-card{position:relative;display:grid;grid-template-columns:37% minmax(0,1fr);min-height:290px;overflow:hidden;border:1px solid #77cfb446;border-radius:22px;background:linear-gradient(120deg,#144a3b,#195950);box-shadow:0 14px 32px #051d1622}.learning-world-card .lesson-image{padding:0;align-self:stretch;border:0;border-radius:0;box-shadow:none;background:#12382e;min-width:0;overflow:hidden}.learning-world-card .lesson-image img{height:100%;min-height:290px;width:100%;object-fit:cover;border-radius:0}.world-card-copy{padding:30px 23px 69px;align-self:center;min-width:0}.world-card-copy>span{font-size:10px;font-weight:800;letter-spacing:.09em;color:#7bdbc7}.world-hsk .world-card-copy>span{color:#f2c66d}.world-office .world-card-copy>span{color:#a2d9ff}.world-cnc .world-card-copy>span{color:#ffbc8b}.world-card-copy h3{font-size:clamp(21px,2vw,28px);color:#fff6d4;line-height:1.35;margin:17px 0 7px}.world-card-copy em{font-size:12px;color:#b0ded0}.world-card-copy p{font-size:12px;color:#e5f6ef;line-height:1.65;margin:10px 0}.world-card-copy p b{color:#f4cf7b}.world-card-copy small{display:block;border-top:1px solid #a1ceba22;padding-top:14px;margin-top:21px;color:#acccc1;font-size:10px}.learning-world-card>.lesson-audio{position:absolute;left:calc(37% + 23px);bottom:19px;right:20px;display:flex;flex-direction:row;gap:7px;flex-wrap:wrap}.learning-world-card>.lesson-audio button{display:flex;gap:6px;align-items:center;justify-content:center;flex:1;min-width:45px;padding:7px 9px;border:1px solid #8bd5bd40;background:#0d342bb0;color:#d4f5e4;border-radius:8px;font-size:10px}.learning-world-card>.lesson-audio button b{display:inline;font-size:13px}.learning-world-card>.lesson-audio button[aria-pressed=true]{background:#357957;border-color:#b3eccc80}
@media(max-width:900px){.learning-world-grid{grid-template-columns:1fr}.learning-world-card{min-height:270px;grid-template-columns:35% minmax(0,1fr)}.learning-world-card .lesson-image img{min-height:270px}.world-card-copy{padding:24px 25px 70px}.world-card-copy h3{font-size:26px}.world-card-copy p{font-size:13px}.learning-world-card>.lesson-audio{left:calc(35% + 25px);right:25px}.reference-heading h2{font-size:25px}}
@media(max-width:600px){.reference-heading{display:block;margin-bottom:20px}.reference-heading p{max-width:none;font-size:11px}.reference-lessons{margin-top:35px}.learning-world-card{border-radius:16px;grid-template-columns:33% minmax(0,1fr);min-height:280px}.learning-world-card .lesson-image img{min-height:280px}.world-card-copy{padding:22px 16px 72px}.world-card-copy>span{font-size:9px}.world-card-copy h3{font-size:23px;margin-top:13px}.world-card-copy p,.world-card-copy em{font-size:11px}.world-card-copy small{font-size:9px;padding-top:12px;margin-top:16px}.learning-world-card>.lesson-audio{left:calc(33% + 16px);right:16px;bottom:16px;gap:5px}.learning-world-card>.lesson-audio button{padding:7px 4px;min-width:38px;font-size:9px}}
.review-option{background:#183d31;color:#c7ecd4;border:1px solid #71998544}.exam-bar{flex-wrap:wrap}#exam-time-progress{flex-basis:100%;max-width:280px}.login-progress h2{font-size:24px}.login-calendar{padding:0}.account-identity .tcx-avatar{flex:none}