:root{color:#20333a;font-synthesis:none;--ink:#182e36;--muted:#6c7879;--lime:#dafa7b;--line:#dfe5df;--teal:#347c72;background:#f5f5ef;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Microsoft JhengHei,sans-serif;font-weight:400}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}button:focus-visible,a:focus-visible{outline-offset:4px;outline:3px solid #5ba59b}input:focus,select:focus{outline-offset:1px;outline:2px solid #76a79d}button{border:0}svg{flex-shrink:0}h1,h2,p{margin-top:0}h1,h2{color:var(--ink)}button{color:inherit}.header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;max-width:1440px;height:112px;margin:auto;padding:24px 64px;display:flex}.brand{text-align:left;letter-spacing:1.3px;background:0 0;align-items:center;gap:12px;padding:0;font-size:24px;font-weight:800;display:flex}.brand img{width:43px;height:43px}.brand small{letter-spacing:2.25px;color:#70817e;margin-top:3px;font-size:9px;font-weight:600;display:block}.header-right{align-items:center;gap:24px;display:flex}.context-pill{white-space:nowrap;border:1px solid #d9e0d8;border-radius:24px;align-items:center;gap:9px;padding:9px 15px;font-size:13px;display:inline-flex}.context-pill>span,.dot{background:#4e8c76;border-radius:50%;width:7px;height:7px;display:inline-block}.home{background:radial-gradient(at 95% 16%,#e7eee2 0,#0000 40%),#f5f5ef;flex-direction:column;min-height:100dvh;display:flex}.home-main{flex:1;grid-template-columns:1fr 1fr;align-items:center;gap:80px;width:100%;max-width:1360px;margin:auto;padding:40px 88px 48px;display:grid}.eyebrow{letter-spacing:2px;color:#60756c;margin-bottom:18px;font-size:11px;font-weight:650;display:block}.tiny-star{vertical-align:-1px;margin-right:7px;font-size:19px}.welcome h1{letter-spacing:1px;margin:25px 0;font-size:clamp(45px,5.3vw,72px);line-height:1.3}.welcome h1>span{color:#407769}.welcome-copy{color:#71807a;font-size:17px;line-height:1.95}.welcome-note{color:#647a6f;align-items:center;gap:10px;margin-top:42px;font-size:12px;display:flex}.entry-side{padding-top:220px;position:relative}.orbital-art{width:100%;height:220px;position:absolute;top:-20px;overflow:hidden}.planet{background:#d9ee9c;border-radius:50%;width:126px;height:126px;position:absolute;top:28px;left:48%;transform:translate(-50%)rotate(-18deg);box-shadow:inset -20px -12px #b7d27d}.planet>span{background:#b2ce79;border-radius:50%;width:20px;height:16px;position:absolute;top:29px;left:27px}.planet>i{background:#abc770;border-radius:50%;width:15px;height:10px;position:absolute;top:77px;left:61px}.orbit{z-index:2;border:1px solid #aabfad;border-radius:50%;position:absolute;top:50%;left:48%;transform:translate(-50%,-50%)rotate(-25deg)}.orbit-one{border-width:2px;border-color:#5c8e7b;width:260px;height:62px}.orbit-two{border-style:dashed;border-color:#b8c8b5;width:340px;height:140px;transform:translate(-50%,-50%)rotate(-23deg)}.spark{color:#47786a;position:absolute}.spark-one{font-size:30px;top:12px;left:19%}.spark-two{font-size:24px;top:126px;right:16%}.moon{background:#6c9d8a;border-radius:50%;width:11px;height:11px;position:absolute;top:58px;right:17%}.art-label{letter-spacing:1.7px;color:#8a9c8a;font-size:8px;line-height:1.7;position:absolute;bottom:21px;left:7%}.entry-card{text-align:left;border-radius:14px;align-items:center;gap:19px;width:100%;min-height:122px;margin-bottom:16px;padding:28px;transition:transform .2s,box-shadow .2s;display:flex}.entry-card:hover{transform:translateY(-3px);box-shadow:0 12px 25px #20382d12}.teacher-entry{background:var(--ink);color:#fff;box-shadow:0 10px 22px #182e3610}.student-entry{color:var(--ink);background:#edf0df;border:1px solid #ced9ca}.entry-icon{width:54px;height:54px;color:var(--lime);background:#ffffff12;border-radius:15px;place-items:center;display:grid}.student-entry .entry-icon{color:#507c63;background:#dfe8c8}.entry-content{flex:1;min-width:0}.entry-content strong{letter-spacing:1px;margin-bottom:8px;font-size:23px;display:block}.entry-content>span{color:#b9cac7;font-size:12px}.student-entry .entry-content>span{color:#76856f}.round-arrow{border:1px solid #6c8380;border-radius:50%;place-items:center;width:34px;height:34px;display:grid}.teacher-entry .round-arrow{background:var(--lime);border-color:var(--lime);color:var(--ink)}.student-entry .round-arrow{border-color:#b4c4ae}.entry-caption{text-align:center;letter-spacing:2px;color:#95a28e;margin:24px 0 0;font-size:10px}.footer{color:#8e9b91;letter-spacing:1px;border-top:1px solid var(--line);justify-content:space-between;gap:20px;width:100%;max-width:1440px;margin:auto;padding:24px 64px;font-size:10px;display:flex}.footer span:last-child{color:#6e8274}.footer span:last-child span{padding-left:12px;font-size:16px}.auth-layout{grid-template-columns:1fr 450px;align-items:center;gap:110px;max-width:1110px;margin:70px auto;padding:0 30px;display:grid}.auth-intro h1{letter-spacing:1px;margin:20px 0 24px;font-size:48px;line-height:1.4}.auth-intro h1 span{color:#4a7e6d}.auth-intro>p{color:var(--muted);font-size:15px;line-height:1.9}.intro-decoration{color:#86a675;letter-spacing:27px;margin-top:35px;font-size:47px}.intro-decoration span{color:#bddb85;display:inline-block;transform:rotate(-10deg)}.form-card{border:1px solid var(--line);background:#fff;border-radius:20px;padding:38px;box-shadow:0 12px 45px #19382e05}.form-card h2{letter-spacing:.5px;margin:20px 0 10px;font-size:27px}.section-icon{color:#4c7965;background:#eef3df;border-radius:17px;place-items:center;width:56px;height:56px;display:grid}.muted{color:var(--muted);font-size:14px;line-height:1.7}.form-card form{margin-top:28px}label{color:#354948;margin-bottom:19px;font-size:13px;font-weight:650;line-height:1.5;display:block}input,select{width:100%;min-height:50px;color:var(--ink);background:#fcfdfa;border:1px solid #d9e0dc;border-radius:9px;margin-top:8px;padding:13px 14px;font-size:16px;line-height:1.5;display:block}input::placeholder{color:#a4aea6;font-size:14px;font-weight:400}input[type=number]{appearance:textfield}input::-webkit-inner-spin-button{opacity:1}select{font-size:14px}.button{white-space:nowrap;border-radius:9px;justify-content:center;align-items:center;gap:10px;min-height:47px;padding:12px 20px;font-size:14px;font-weight:650;transition:filter .2s;display:inline-flex}.button:hover:not(:disabled){filter:brightness(.96)}.button.primary{background:var(--ink);color:var(--lime)}.button.secondary{color:#536858;background:#f4f6f0;border:1px solid #dfe5da}.button.full{width:100%}.text-button{color:#6b7c72;background:0 0;justify-content:center;align-items:center;gap:8px;padding:7px 0;font-size:12px;display:inline-flex}.text-button:hover{color:var(--ink)}.form-card>.text-button{width:100%;margin-top:15px}.form-note{color:#94a095;text-align:center;margin:17px 0 0;font-size:11px;line-height:1.8}.form-row{grid-template-columns:1.5fr 1fr;gap:16px;display:grid}.form-row>label{min-width:0}.code-input{letter-spacing:3px;font-weight:700}.code-input::placeholder{letter-spacing:0}.notice{color:#92613b;background:#fff4e7;border:1px solid #f0d2b3;border-radius:9px;margin:18px 0;padding:13px 15px;font-size:13px;line-height:1.7}.dashboard{max-width:1310px;margin:auto;padding:46px 64px 60px}.page-heading{justify-content:space-between;align-items:center;gap:25px;margin-bottom:36px;display:flex}.page-heading .eyebrow{margin-bottom:10px}.page-heading h1{letter-spacing:1px;margin:0 0 10px;font-size:36px}.page-heading p{margin-bottom:0}.heading-spark{color:#8dad69;vertical-align:2px;margin-left:18px;font-size:26px;display:inline-block}.section-line{border-bottom:1px solid var(--line);color:#77847b;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:14px;font-size:12px;display:flex}.class-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.class-card{text-align:left;border:1px solid var(--line);background:#fff;border-radius:15px;padding:25px;transition:transform .2s,box-shadow .2s}.class-card:hover{transform:translateY(-3px);box-shadow:0 12px 25px #20382d0b}.class-card-top{justify-content:space-between;align-items:center;margin-bottom:40px;display:flex}.class-number{letter-spacing:2px;color:#98a197;font-size:12px}.status-pill{color:#869184;white-space:nowrap;background:#f0f2ee;border-radius:20px;align-items:center;padding:5px 11px;font-size:11px;line-height:1.5;display:inline-flex}.status-pill.live{color:#51794c;background:#e8f0d7}.status-pill.large{padding:10px 16px;font-size:13px}.class-card h2{margin-bottom:9px;font-size:23px}.class-card>p{color:var(--muted);margin:0 0 34px;font-size:12px}.class-card-bottom{color:#7b887a;border-top:1px solid #edf0e9;justify-content:space-between;align-items:center;gap:15px;padding-top:17px;font-size:11px;display:flex}.class-card-bottom span:last-child{color:#467860;align-items:center;gap:8px;display:flex}.account-caption{color:#9aa497;overflow-wrap:anywhere;margin-top:36px;font-size:11px}.empty-state{text-align:center;border:1px dashed #ccd6c5;border-radius:17px;flex-direction:column;justify-content:center;align-items:center;min-height:345px;padding:35px;display:flex}.empty-icon{color:#78996e;background:#eaf0dc;border-radius:24px;place-items:center;width:75px;height:75px;margin-bottom:20px;display:grid}.empty-state h2{margin-bottom:12px;font-size:23px}.empty-state p{color:var(--muted);margin-bottom:25px;font-size:13px}.modal-backdrop{z-index:100;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#152b3759;place-items:center;padding:20px;display:grid;position:fixed;inset:0;overflow-y:auto}.modal{width:100%;max-width:480px;position:relative}.modal h2{margin-top:10px}.close-button{color:#73866d;background:#f1f4eb;border-radius:50%;width:36px;height:36px;font-size:26px;position:absolute;top:18px;right:22px}.back-link{margin-bottom:28px}.room-grid{grid-template-columns:minmax(0,1fr) 310px;align-items:start;gap:25px;display:grid}.room-main{min-width:0}.join-code-card{background:#e8efdb;border:1px solid #d2dec2;border-radius:14px;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px;padding:25px 29px;display:flex}.join-code-card .eyebrow{letter-spacing:1px;margin:0 0 6px;font-size:11px}.join-code-card strong{letter-spacing:7px;color:#355b48;font-variant-numeric:tabular-nums;margin-bottom:8px;font-size:37px;display:block}.join-code-card .muted{color:#7f9075;font-size:11px}.icon-button{color:#568063;background:#ffffff8a;border-radius:10px;flex-shrink:0;place-items:center;width:43px;height:43px;display:grid}.lesson-card{border:1px solid var(--line);background:#fff;border-radius:15px;padding:29px}.lesson-card h2{margin:13px 0;font-size:24px}.lesson-top{justify-content:space-between;align-items:center;display:flex}.lesson-top .eyebrow{margin:0}.lesson-form{margin-top:25px}.lesson-form label:nth-child(2){max-width:170px}.page-preview{color:#75866f;background:#f5f6ef;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;min-height:270px;margin:24px 0 0;padding:25px;font-size:14px;display:flex}.preview-star{color:#a5bc71;margin:0 0 16px;font-size:30px}.page-preview strong{color:#415c47;letter-spacing:1px;margin-top:12px;font-size:28px;font-weight:650}.page-label{letter-spacing:1px;color:#859278;background:#f7f8f2;border:1px solid #dce3d1;border-radius:20px;align-self:center;padding:7px 13px;font-size:11px;display:block}.page-preview .page-label{margin-top:36px}.lesson-footer{color:#88927e;justify-content:space-between;align-items:center;gap:15px;margin-top:20px;font-size:12px;display:flex}.danger{color:#b27a64!important}.button.danger-fill{color:#fff;background:#9f5e4d}.confirm-box{color:#8c6b4a;background:#fff8ed;border:1px solid #f2d8b5;border-radius:10px;margin-top:20px;padding:20px;font-size:13px}.confirm-box>div{flex-wrap:wrap;gap:10px;display:flex}.roster-card{border:1px solid var(--line);background:#fff;border-radius:15px;padding:23px}.roster-heading{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.roster-heading h2{margin:0;font-size:17px}.roster-heading>span{color:#899581;font-size:12px}.roster-card>.button{min-height:39px;padding:8px;font-size:12px}.roster-empty{text-align:center;color:#a0ad92;padding:55px 10px}.roster-empty p{margin:15px 0 0;font-size:12px;line-height:1.9}.roster-list{margin:20px 0 0;padding:0;list-style:none}.roster-list li{border-bottom:1px solid #edf0e8;align-items:center;gap:11px;padding:13px 0;font-size:12px;display:flex}.roster-list li:last-child{border-bottom:0}.roster-list strong{overflow-wrap:anywhere;flex:1;font-weight:550}.seat-badge{color:#748b66;background:#f1f4e9;border-radius:8px;flex-shrink:0;place-items:center;width:30px;height:30px;font-size:11px;display:grid}.roster-list .muted{font-size:10px}.joined-label{color:#639264;font-size:10px}.loading-state{color:#7e8d79;place-items:center;min-height:45vh;font-size:14px;display:grid}.student-room{max-width:1050px;margin:35px auto;padding:0 40px 50px}.student-room-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:25px;display:flex}.student-chip{color:#6f836b;font-size:13px}.student-lesson{border:1px solid var(--line);text-align:center;background:#fff;border-radius:20px;flex-direction:column;align-items:center;min-height:520px;padding:45px 30px;display:flex}.student-lesson h1{margin-bottom:30px;font-size:26px}.student-lesson h2{margin-top:12px;margin-bottom:16px;font-size:29px}.student-lesson p{color:var(--muted);margin-bottom:30px;font-size:14px;line-height:1.9}.student-orbit{width:110px;height:110px;margin:10px 0 22px;position:relative}.student-orbit img{border-radius:34px;width:100%;height:100%}.student-orbit>span{color:#afc879;font-size:34px;position:absolute;top:-10px;right:-25px}@media (width>=1440px){.home-main{gap:120px}.welcome h1{font-size:76px}.orbital-art{top:-22px}}@media (width<=1100px){.header{padding:24px 36px}.home-main{gap:45px;padding:45px 48px}.welcome h1{font-size:56px}.entry-card{gap:13px;padding:23px}.entry-content strong{font-size:21px}.entry-content>span{font-size:11px}.footer{padding:24px 36px}.auth-layout{grid-template-columns:1fr 420px;gap:60px}.dashboard{padding:36px}.class-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.room-grid{grid-template-columns:minmax(0,1fr) 270px}.join-code-card strong{letter-spacing:5px;font-size:30px}.page-preview strong{font-size:23px}}@media (width<=760px){.header{height:88px;padding:20px 24px}.brand{gap:10px;font-size:21px}.brand img{width:38px;height:38px}.brand small{letter-spacing:1.7px;font-size:8px}.context-pill{gap:7px;padding:7px 10px;font-size:11px}.header-right{gap:13px}.home-main{grid-template-columns:1fr;gap:0;max-width:560px;padding:35px 26px 30px}.welcome h1{margin:16px 0;font-size:47px}.welcome-copy{margin-bottom:12px;font-size:14px;line-height:1.9}.welcome-note{margin-top:21px;font-size:10px}.welcome .eyebrow{margin-bottom:8px;font-size:10px}.entry-side{margin-top:6px;padding-top:160px}.orbital-art{width:84%;height:160px;top:0;left:8%}.planet{width:91px;height:91px;top:24px;left:51%;box-shadow:inset -13px -10px #b7d27d}.planet>span{width:14px;height:13px;top:19px;left:20px}.planet>i{width:12px;height:8px;top:56px;left:43px}.orbit{left:51%}.orbit-one{width:205px;height:44px}.orbit-two{width:278px;height:104px}.spark-one{font-size:22px;top:8px;left:15%}.spark-two{font-size:20px;top:102px;right:6%}.moon{width:8px;height:8px;top:31px;right:9%}.art-label{font-size:6px;bottom:8px;left:0}.entry-card{gap:15px;min-height:105px;margin-bottom:12px;padding:22px}.entry-icon{border-radius:13px;width:47px;height:47px}.entry-content strong{margin-bottom:6px;font-size:21px}.entry-content>span{font-size:11px}.round-arrow{width:30px;height:30px}.entry-caption{margin-top:18px;font-size:9px}.footer{padding:21px 25px;font-size:9px}.footer>span:last-child{display:none}.auth-layout{max-width:510px;margin:32px auto;padding:0 22px;display:block}.auth-intro .eyebrow{margin-bottom:10px;font-size:10px}.auth-intro h1{margin:0 0 12px;font-size:34px;line-height:1.45}.auth-intro h1 br:nth-child(2){display:none}.auth-intro>p{margin-bottom:25px;font-size:12px}.intro-decoration{display:none}.form-card{border-radius:17px;padding:28px}.form-card h2{font-size:24px}.section-icon{border-radius:14px;width:47px;height:47px}.student-auth .auth-intro h1 br,.student-auth .auth-intro>p br{display:none}.form-card .muted{font-size:12px}.dashboard{padding:27px 22px 45px}.page-heading{align-items:flex-start;gap:15px;margin-bottom:27px}.page-heading h1{font-size:28px}.page-heading .eyebrow{font-size:10px}.page-heading .muted{font-size:12px}.page-heading>.button{min-height:42px;margin-top:12px;padding:11px 13px;font-size:12px}.heading-spark{margin-left:9px;font-size:20px}.class-grid{grid-template-columns:1fr}.class-card{padding:24px}.class-card-top,.class-card>p{margin-bottom:25px}.section-line{margin-bottom:19px}.empty-state{min-height:320px;padding:26px}.empty-state h2{font-size:21px}.empty-state p{font-size:12px}.room-grid{grid-template-columns:1fr;gap:20px}.join-code-card{padding:21px}.join-code-card strong{letter-spacing:5px;font-size:29px}.join-code-card .muted{font-size:9px}.lesson-card{padding:23px}.lesson-card h2{font-size:21px}.page-preview{min-height:245px;padding:20px}.page-preview strong{font-size:22px}.roster-card{padding:23px}.roster-empty{padding:30px}.status-pill.large{padding:8px 11px;font-size:10px}.back-link{margin-bottom:22px}.student-room{margin:25px auto;padding:0 22px 35px}.student-room-heading{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:20px}.student-chip{font-size:12px}.student-lesson{min-height:480px;padding:35px 20px}.student-lesson h1{font-size:23px;line-height:1.5}.student-lesson h2{font-size:24px}.student-lesson p{font-size:12px}.modal{margin:auto}.modal h2{font-size:23px}.form-row{gap:12px}.page-heading .status-pill.large{margin-top:17px}.header-right>.text-button{font-size:11px}}h1,h2{overflow-wrap:anywhere}.student-lesson h1{text-wrap:balance;max-width:100%}textarea{font:inherit;width:100%;color:var(--ink);resize:vertical;background:#fcfdfa;border:1px solid #d9e0dc;border-radius:9px;margin-top:8px;padding:14px;font-size:15px;line-height:1.8;display:block}textarea:focus{outline-offset:1px;outline:2px solid #76a79d}.teacher-shell{min-height:100dvh}.teacher-sidebar{z-index:50;background:#fff;border-right:1px solid #e0e5de;flex-direction:column;width:224px;padding:27px 17px 0;display:flex;position:fixed;inset:0 auto 0 0;overflow-y:auto}.teacher-sidebar .brand{white-space:nowrap;gap:9px;margin:0 5px;font-size:20px}.teacher-sidebar .brand img{width:38px;height:38px}.teacher-sidebar .brand small{letter-spacing:2px;font-size:7px}.sidebar-caption{color:#9ba592;letter-spacing:1px;margin:23px 11px 18px;font-size:10px}.teacher-sidebar nav{gap:9px;display:grid}.teacher-sidebar nav button{text-align:left;color:#6c7c6e;background:0 0;border-radius:11px;align-items:center;gap:14px;min-height:48px;padding:13px 17px;font-size:14px;font-weight:650;display:flex}.teacher-sidebar nav button:hover{background:#f2f5ec}.teacher-sidebar nav button.active{color:#e1f4b8;background:#20343e;box-shadow:0 5px 12px #20343e0e}.sidebar-note{color:#7c9770;gap:11px;margin-top:auto;padding:55px 13px 35px;display:flex}.sidebar-note>span{font-size:22px}.sidebar-note p{margin:3px 0;font-size:11px;line-height:1.7}.sidebar-note small{color:#a2ab9a;margin-top:6px;font-size:9px;display:block}.sidebar-account{border-top:1px solid #edf0e7;align-items:center;gap:10px;padding:21px 0 24px;display:flex}.teacher-avatar{color:#5d7e47;background:#e2edc2;border-radius:50%;flex-shrink:0;place-items:center;width:34px;height:34px;font-size:14px;font-weight:700;display:grid}.sidebar-account>div{flex:1;min-width:0}.sidebar-account strong{text-overflow:ellipsis;white-space:nowrap;color:#455d4b;max-width:126px;font-size:10px;display:block;overflow:hidden}.sidebar-account small{color:#9aa58f;margin-top:5px;font-size:9px;display:block}.sidebar-account>button{color:#89977e;background:0 0;padding:4px}.teacher-workspace{background-color:#f4f6f0;background-image:linear-gradient(#dce6db38 1px,#0000 1px),linear-gradient(90deg,#dce6db38 1px,#0000 1px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:24px 24px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;min-height:100dvh;margin-left:224px}.workspace-topbar{z-index:25;background:#ffffffed;border-bottom:1px solid #dfe6dc;align-items:center;gap:15px;height:80px;padding:22px 38px;display:flex;position:sticky;top:0}.workspace-topbar>strong{letter-spacing:.4px;font-size:21px}.personal-badge{color:#81917b;align-items:center;gap:7px;margin-left:auto;font-size:10px;display:flex}.personal-badge>span{background:#78a374;border-radius:50%;width:6px;height:6px}.sidebar-toggle,.sidebar-backdrop{display:none}.teacher-shell .dashboard{max-width:1450px;padding:36px 38px 55px}.teacher-shell .page-heading h1{font-size:30px}.teacher-shell .page-heading{margin-bottom:29px}.teacher-shell .class-grid{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.teacher-shell .class-card{padding:0;overflow:hidden}.teacher-shell .class-card-top{background:linear-gradient(135deg,#20343e,#38594d);min-height:103px;margin:0 0 23px;padding:24px}.teacher-shell .class-number{color:#d9eca4;letter-spacing:0;font-size:31px;font-weight:700}.teacher-shell .class-card-top .status-pill{color:#d3e0d2;background:#ffffff1a}.teacher-shell .class-card-top .status-pill.live{color:#42603a;background:#d8edac}.teacher-shell .class-card h2{margin:0 22px 10px;font-size:22px}.teacher-shell .class-card>p{min-height:19px;margin:0 22px 22px}.class-security{color:#7c9271;align-items:center;gap:7px;margin:0 22px 20px;font-size:10px;display:flex}.teacher-shell .class-card-bottom{margin:0 22px 22px}.teacher-shell .room-grid{grid-template-columns:minmax(0,1fr) 310px}.teacher-shell .join-code-card{gap:15px;padding:24px}.teacher-shell .join-code-card strong{letter-spacing:4px;font-size:29px}.invite-button{min-height:43px;padding:11px 13px;font-size:11px}.teacher-shell .roster-card{padding:21px}.seat-tabs{background:#f2f5ed;border-radius:9px;gap:2px;margin-bottom:18px;padding:4px;display:flex}.seat-tabs button{white-space:nowrap;color:#88957d;background:0 0;border-radius:6px;flex:1;justify-content:center;align-items:center;gap:4px;padding:8px 6px;font-size:10px;display:flex}.seat-tabs button.active{color:#3c5f4e;background:#fff;box-shadow:0 2px 5px #273d2f0a}.seat-tabs button span{color:#9aa58f;font-size:9px}.seat-summary{color:#929c87;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:11px;display:flex}.seat-summary strong{color:#507151;font-size:12px}.seat-summary strong span{color:#929c87;font-weight:400}.seat-grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:7px;display:grid}.seat-cell{color:#a3ac98;font-variant-numeric:tabular-nums;background:#f3f5ef;border:1px dashed #d8dfd0;border-radius:7px;min-width:0;height:36px;font-size:12px}.seat-cell.online,.seat-cell.registered{color:#fff;background:#5f9770;border:1px solid #5f9770}.seat-cell.lost{color:#ae8a4d;background:#fffbf0;border:1.5px solid #d8b476}.seat-cell.selected{outline-offset:2px;outline:2px solid #68866b}.seat-cell:hover{filter:brightness(.97)}.seat-legend{color:#9aa38e;flex-wrap:wrap;gap:11px;margin:15px 0 22px;font-size:9px;display:flex}.seat-legend>span{align-items:center;gap:5px;display:flex}.seat-legend i{background:#f3f5ef;border:1px dashed #cdd6c3;border-radius:2px;width:9px;height:9px;display:block}.seat-legend i.online,.seat-legend i.registered{background:#5f9770;border:1px solid #5f9770}.seat-legend i.lost{background:#fff9ec;border:1px solid #d8b476}.seat-detail{color:#617b5b;background:#f7f9f1;border:1px solid #dce5d2;border-radius:9px;flex-direction:column;gap:7px;margin-bottom:17px;padding:12px;font-size:12px;display:flex}.seat-detail>span{color:#929f86;font-size:10px}.qr-modal{max-width:520px}.qr-modal h2{margin-top:0;padding-right:30px}.qr-frame{background:#fff;place-items:center;min-height:260px;display:grid}.qr-frame img{width:min(100%,320px);height:auto;image-rendering:pixelated;display:block}.share-code{background:#eff4e5;border-radius:10px;justify-content:space-between;align-items:center;gap:15px;margin:8px 0 20px;padding:15px 18px;display:flex}.share-code>span{color:#8c9b7c;font-size:11px}.share-code strong{letter-spacing:3px;color:#4c6d49;font-family:ui-monospace,monospace;font-size:20px}.qr-modal label>input{color:#71836b;font-size:11px;font-weight:400}.credentials-modal{max-width:720px}.credentials-modal h2{margin-top:0}.credential-actions{flex-wrap:wrap;gap:12px;margin:24px 0;display:flex}.table-scroll{max-height:50vh;overflow:auto}.credential-table{border-collapse:collapse;text-align:left;width:100%;font-size:13px}.credential-table th{color:#7b8b6e;background:#f2f5eb;font-size:11px;position:sticky;top:0}.credential-table td,.credential-table th{border-bottom:1px solid #e6ecdf;padding:14px}.secret-code{white-space:nowrap;letter-spacing:1px;color:#4f7150;font-family:ui-monospace,monospace}.class-picker{max-width:390px;margin-bottom:26px}.class-picker select{background:#fff}.roster-management-grid{grid-template-columns:minmax(0,1fr) 350px;align-items:start;gap:24px;display:grid}.roster-section-heading{justify-content:space-between;align-items:center;gap:20px;display:flex}.roster-section-heading h2{margin-top:0}.roster-management-grid .lesson-card h2{font-size:22px}.roster-management-grid form{margin-top:23px}.expected-seat-settings{border-top:1px solid #e5ebde;margin-top:29px;padding-top:25px}.expected-seat-settings .form-note{text-align:left}.identity-settings .section-icon{margin-bottom:20px}.switch-row{cursor:pointer;background:#f3f6ec;border-radius:10px;justify-content:space-between;align-items:center;gap:20px;margin:23px 0 14px;padding:15px;font-size:12px;display:flex}.switch-row>span small{color:#91a17e;margin-top:4px;font-size:10px;font-weight:400;display:block}.switch-row input{appearance:none;cursor:pointer;background:#cbd6bf;border:0;border-radius:20px;flex-shrink:0;width:38px;height:23px;min-height:23px;margin:0;padding:0;display:block;position:relative}.switch-row input:before{content:"";background:#fff;border-radius:50%;width:17px;height:17px;transition:transform .15s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #20382022}.switch-row input:checked{background:#65946b}.switch-row input:checked:before{transform:translate(15px)}.setting-help{color:#98a28b;margin:0 0 19px;font-size:11px;line-height:1.8}.roster-preview{margin-top:24px}.success-notice{color:#628148;background:#eef6e3;border:1px solid #cfe1bd;border-radius:9px;margin:20px 0;padding:13px 16px;font-size:12px;line-height:1.7}.account-card{border:1px solid var(--line);background:#fff;border-radius:16px;align-items:center;gap:22px;margin-bottom:28px;padding:29px;display:flex}.account-card .teacher-avatar{width:64px;height:64px;font-size:24px}.account-card>div>small{color:#93a083;font-size:10px}.account-card h2{margin:8px 0 13px;font-size:23px}.account-card .account-count{color:#96a284;white-space:nowrap;align-items:center;gap:10px;margin-left:auto;display:flex}.account-count>strong{color:#6d8f58;font-size:35px}.account-count>span{font-size:12px}.account-roster h2{font-size:22px}.account-seat-columns{grid-template-columns:1fr 1fr;gap:35px;margin:28px 0;display:grid}.account-seat-columns>div{min-width:0}.account-seat-columns h3{color:#7b8c6e;margin:0 0 20px;font-size:13px}.account-seat-columns .seat-grid{grid-template-columns:repeat(6,minmax(0,1fr))}.join-class-context{background:#f1f5e9;border:1px solid #e1e9d6;border-radius:9px;flex-direction:column;gap:6px;margin:-5px 0 22px;padding:13px 15px;display:flex}.join-class-context strong{color:#57744c;font-size:12px}.join-class-context>span{color:#8c9b7b;font-size:10px;line-height:1.7}.join-class-context small{color:#6d925b;align-items:center;gap:5px;margin-top:3px;font-size:9px;display:flex}.field-error{color:#ac8463;margin:-8px 0 20px;font-size:11px;line-height:1.7}.identity-input{position:relative}.identity-input input{letter-spacing:1px;padding-right:66px;font-family:ui-monospace,monospace}.identity-input button{color:#8d9d7d;background:0 0;padding:8px;font-size:10px;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.identity-note{text-align:left;margin:-5px 0 24px}@media (width<=1200px){.roster-management-grid{grid-template-columns:minmax(0,1fr) 310px}.teacher-shell .dashboard{padding:32px 28px}.workspace-topbar{padding:22px 28px}.teacher-shell .room-grid{grid-template-columns:minmax(0,1fr) 285px}.teacher-shell .join-code-card{flex-wrap:wrap;padding:22px}.teacher-shell .join-code-card strong{font-size:28px}.teacher-shell .invite-button{width:100%}.account-seat-columns{gap:23px}}@media (width<=1000px){.teacher-sidebar{width:204px;padding-left:13px;padding-right:13px}.teacher-workspace{margin-left:204px}.teacher-sidebar .brand{font-size:18px}.teacher-sidebar .brand img{width:34px;height:34px}.roster-management-grid{grid-template-columns:1fr}.roster-management-grid>div{grid-template-columns:1fr 1fr;align-items:start;gap:20px;display:grid}.roster-preview{margin-top:0}.teacher-shell .room-grid{grid-template-columns:1fr}.teacher-shell .invite-button{width:auto}.teacher-shell .join-code-card{flex-wrap:nowrap}.teacher-shell .roster-card .seat-grid{grid-template-columns:repeat(10,minmax(0,1fr))}.roster-management-grid .roster-card .seat-grid{grid-template-columns:repeat(6,minmax(0,1fr))}.account-seat-columns{grid-template-columns:1fr;gap:15px}.account-card{gap:15px;padding:23px}.account-card h2{font-size:19px}.account-card .account-count{display:none}}@media (width<=760px){.teacher-sidebar{z-index:90;width:224px;transition:transform .2s;transform:translate(-100%)}.teacher-sidebar.open{transform:translate(0)}.teacher-workspace{margin-left:0}.sidebar-backdrop{z-index:89;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#1b302d66;display:block;position:fixed;inset:0}.workspace-topbar{gap:12px;height:71px;padding:14px 20px}.workspace-topbar>strong{font-size:18px}.personal-badge{font-size:9px}.sidebar-toggle{background:#edf2e4;width:34px;height:34px;display:grid}.teacher-shell .dashboard{padding:26px 20px 40px}.teacher-shell .page-heading h1{font-size:27px}.teacher-shell .page-heading>.button{padding:10px 12px;font-size:11px}.teacher-shell .class-grid{grid-template-columns:1fr}.teacher-shell .class-card-top{min-height:95px}.teacher-shell .join-code-card{flex-wrap:wrap;gap:13px;padding:20px}.teacher-shell .join-code-card strong{letter-spacing:4px;font-size:28px}.teacher-shell .invite-button{width:100%;min-height:42px}.teacher-shell .roster-card .seat-grid{grid-template-columns:repeat(6,minmax(0,1fr))}.roster-management-grid>div{display:block}.roster-management-grid .lesson-card{padding:23px}.roster-preview{margin-top:22px}.roster-section-heading{align-items:flex-start;gap:12px}.roster-section-heading h2{font-size:20px}.account-card{padding:21px}.account-card .teacher-avatar{width:42px;height:42px;font-size:18px}.account-card h2{overflow-wrap:anywhere;font-size:16px}.account-card>div{min-width:0}.account-roster .roster-section-heading{flex-wrap:wrap}.account-roster .class-picker{margin-top:20px}.account-seat-columns{margin:22px 0}.qr-modal{padding:27px}.qr-frame{min-height:220px}.share-code{flex-wrap:wrap;gap:8px}.share-code strong{font-size:22px}.credential-actions .button{padding:11px 14px;font-size:11px}.credentials-modal{padding:27px}.credential-table td,.credential-table th{padding:12px 9px}.secret-code{letter-spacing:0;font-size:11px}.roster-management-grid form>.button{font-size:12px}.personal-badge>span{display:none}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.connection-badge{color:#7b896e;white-space:nowrap;background:#f5f7ef;border:1px solid #dde4d8;border-radius:22px;align-items:center;gap:8px;padding:9px 12px;font-size:11px;display:inline-flex}.connection-badge>span{background:#a9b395;border-radius:50%;flex-shrink:0;width:7px;height:7px}.connection-badge.live{color:#47744e;background:#eaf2df;border-color:#d4e3c7}.connection-badge.live>span{background:#68a269}.connection-badge.polling{color:#98783d;background:#fbf5e7;border-color:#eaddc1}.connection-badge.polling>span{background:#c3a05f}.connection-badge.offline{color:#a16550;background:#fff1e9;border-color:#edcbbb}.connection-badge.offline>span{background:#ba806a}.page-preview strong.current-page{letter-spacing:2px;margin-top:14px;font-size:44px}.page-controls{justify-content:space-between;align-items:center;gap:12px;padding-top:20px;display:flex}.page-controls>span{font-variant-numeric:tabular-nums;color:#819078;font-size:13px}.presence-summary{border-bottom:1px solid #e8ece1;justify-content:space-between;align-items:center;gap:15px;padding:22px 0 17px;display:flex}.presence-summary strong{font-variant-numeric:tabular-nums;color:#4d7c58;font-size:29px}.presence-summary small{margin-left:7px;font-size:11px;font-weight:500}.presence-summary>span{color:#a28c68;max-width:125px;font-size:10px;line-height:1.7}.lost-label{color:#b28a59;font-size:10px}.presence-note{color:#9aa18f;margin:22px 0 0;font-size:10px;line-height:1.8}.student-connection{justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;display:flex}.student-connection>span:last-child{color:#8b9880;font-size:11px}.student-lesson h2.student-current-page{color:#3e6a50;letter-spacing:2px;margin:5px 0 18px;font-size:44px}@media (width<=760px){.page-heading>.connection-badge{margin-top:16px;padding:8px 10px;font-size:10px}.page-controls .button{min-height:44px;padding:12px 14px;font-size:12px}.page-preview strong.current-page{font-size:36px}.student-connection{flex-wrap:wrap}.student-connection>span:last-child{font-size:10px}.student-lesson h2.student-current-page{font-size:38px}.presence-summary>span{max-width:none}.presence-note{font-size:11px}}