/* Independent NFC prototype: reuse existing brand tokens without changing shared CSS. */
.nfc-body{display:block;height:auto;min-height:100vh;overflow:auto;background:var(--c-bg)}
.nfc-header{height:84px;padding:0 36px;display:flex;align-items:center;gap:18px;background:white;border-bottom:1px solid var(--c-border)}
.brand{display:flex;align-items:center;gap:12px;color:var(--c-navy);text-decoration:none;font-size:18px;font-weight:700}.brand img{width:40px;height:40px;object-fit:cover;border-radius:50%}.brand small{display:block;font-size:11px;color:var(--c-muted);font-weight:400;margin-top:2px}.nfc-header nav{margin-left:auto;display:flex;gap:24px}.nfc-header a:not(.brand),.student-footer a{color:var(--c-muted);font-size:13px;text-decoration:none}.nfc-header>.demo-chip{margin-left:auto}.demo-chip{background:var(--c-gold-lt);color:var(--c-amber);font-size:11px;padding:5px 10px;border-radius:5px;white-space:nowrap}.teacher-avatar{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--c-navy);color:white;margin-left:10px}.nfc-header>b{font-size:13px}.demo-bar{padding:8px 36px;background:#eaf0f7;color:var(--c-muted);font-size:11px;display:flex;justify-content:space-between}.teacher-main{max-width:1400px;margin:auto;padding:30px 36px 22px}h1,h2,h3{color:var(--c-navy)}.title-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;gap:20px}h1{font-size:28px;line-height:1.4;letter-spacing:-.6px}.eyebrow{color:var(--c-gold);font-size:12px;font-weight:600;margin-bottom:8px}.muted{color:var(--c-muted);font-size:13px;margin-top:8px}.title-actions{display:flex;gap:10px}button,select,input,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--c-border);border-radius:7px;background:white;color:var(--c-navy);padding:10px 16px;font-size:13px;line-height:1.4}button:hover{border-color:#86acd8;background:#f5f9ff}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #80b6ef;outline-offset:3px}.primary{background:var(--c-navy);border-color:var(--c-navy);color:white;font-weight:600}.primary:hover{background:var(--c-navy-2);color:white}.danger{color:var(--c-red)}.periods{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px}.period{display:flex;align-items:center;justify-content:space-between;text-align:left;padding:14px 18px;border-bottom:3px solid transparent}.period strong{display:block;font-size:14px;margin-bottom:4px}.period small{color:var(--c-muted);font-size:11px}.period.active{border:1px solid var(--c-navy);border-bottom:3px solid var(--c-navy);background:#edf3fb}.period>span{font-size:11px;color:var(--c-muted)}.session-banner{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--c-blue-lt);color:var(--c-navy);border-radius:7px;font-size:13px;gap:12px}.session-banner small{font-size:11px;color:var(--c-muted);margin-left:12px}.session-banner button{padding:5px 12px}.metrics{display:grid;grid-template-columns:repeat(4,1fr);background:white;border:1px solid var(--c-border);border-radius:8px;margin:18px 0 22px;padding:18px 0}.metric{padding:0 24px;border-right:1px solid var(--c-border)}.metric:last-child{border:0}.metric-label{font-size:12px;color:var(--c-muted)}.metric-value{font-size:30px;font-weight:650;line-height:1.4;color:var(--c-navy);font-variant-numeric:tabular-nums}.metric-value small{font-size:13px;color:var(--c-muted);font-weight:400;margin-left:7px}.metric-detail{font-size:11px;color:var(--c-muted)}.classroom-layout{display:grid;grid-template-columns:minmax(0,1fr) 282px;gap:20px}.classroom,.attention{border:1px solid var(--c-border);border-radius:9px;background:white}.classroom{padding:20px 24px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.section-heading h2{font-size:16px}.segmented{display:flex;background:#eef3f8;padding:3px;border-radius:6px}.segmented button{padding:6px 12px;border:0;background:transparent;color:var(--c-muted);font-size:12px}.segmented button.active{background:white;color:var(--c-navy);box-shadow:var(--shadow-sm)}.legend{display:flex;gap:18px;margin:17px 0;color:var(--c-muted);font-size:11px;flex-wrap:wrap}.dot:before{content:'';display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:6px;background:#b8c3d0}.dot.reviewed:before{background:var(--c-green)}.dot.pending:before{background:var(--c-blue)}.dot.late:before{background:var(--c-amber)}.dot.absent:before{background:var(--c-red)}.podium{margin:8px auto 22px;max-width:240px;border-bottom:3px solid #c4cfdb;background:#f1f4f8;color:#63748a;font-size:11px;letter-spacing:8px;text-align:center;padding:7px}.seat-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.seat{border:1px solid #c7dcca;border-top:3px solid var(--c-green);background:#f5faf7;border-radius:7px;text-align:left;padding:10px 12px;min-height:102px;color:var(--c-text);position:relative}.seat.pending{border-color:#bad0e7;border-top-color:var(--c-blue);background:#f5f9fe}.seat.late{border-color:#ead8b8;border-top-color:var(--c-amber);background:#fffbf2}.seat.empty{border:1px dashed #ccd5e0;background:#fafbfd}.seat.absent{border-color:#efc9c9;border-top-color:var(--c-red);background:#fff7f7}.seat-top{display:flex;justify-content:space-between;font-size:11px;color:var(--c-muted)}.seat-top span:last-child{color:var(--c-green)}.seat.pending .seat-top span:last-child{color:var(--c-blue)}.seat.late .seat-top span:last-child{color:var(--c-amber)}.seat.absent .seat-top span:last-child{color:var(--c-red)}.seat b{display:block;font-size:14px;margin-top:10px}.seat small{display:block;font-size:10px;color:var(--c-muted);margin-top:5px}.seat-caption{text-align:center;font-size:11px;color:var(--c-muted);margin:20px 0 0}.attention{padding:20px 18px}.badge-count{border-radius:4px;padding:1px 7px;font-size:12px;background:var(--c-gold-lt);color:var(--c-amber)}.todo{display:block;width:100%;text-align:left;padding:15px 0;border:0;border-bottom:1px solid var(--c-border);border-radius:0}.todo b{font-size:13px}.todo small{display:block;font-size:11px;color:var(--c-muted);margin:5px 0 0}.todo .tag{float:right;font-size:10px;padding:2px 5px}.rule-note{padding:14px;background:#f5f7fa;border-radius:6px;margin-top:22px;font-size:11px;color:var(--c-muted);line-height:1.7}.rule-note b{color:var(--c-navy);font-size:12px}.rule-note p{margin:5px 0 10px}.confirmation{margin-top:20px;padding:20px 24px;background:var(--c-navy);border-radius:8px;display:flex;justify-content:space-between;align-items:center;gap:20px;color:white}.confirmation h3{color:white;font-size:15px}.confirmation p{font-size:11px;color:#bfcede;margin-top:6px}.confirmation button{background:white;color:var(--c-navy);min-width:200px}.teacher-foot{display:flex;justify-content:space-between;font-size:11px;color:var(--c-muted);padding:16px 0}.empty-state{text-align:center;padding:50px 20px;color:var(--c-muted);font-size:13px}.empty-state h3{margin-bottom:10px}.attendance-table{overflow:auto;max-height:490px}.attendance-table table{min-width:600px}.attendance-table th,.attendance-table td{font-size:12px;padding:10px}.attendance-table button{padding:5px 10px}dialog{margin:auto;border:1px solid var(--c-border);border-radius:12px;padding:26px;width:min(510px,calc(100% - 32px));max-height:85vh;box-shadow:var(--shadow-md);color:var(--c-text)}dialog::backdrop{background:rgba(8,30,57,.35)}.dialog-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.dialog-head h2{font-size:20px}.dialog-head button{padding:4px 10px}.dialog-description{font-size:13px;color:var(--c-muted);margin-bottom:18px;line-height:1.7}.field{display:block;margin-bottom:16px;font-size:12px;color:var(--c-muted)}.field select,.field input,.field textarea{display:block;width:100%;margin-top:7px;padding:11px;border:1px solid var(--c-border);border-radius:6px;background:white;color:var(--c-text);font-size:14px}.field textarea{min-height:84px;resize:vertical}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.callout{font-size:12px;line-height:1.8;background:var(--c-gold-lt);padding:12px 14px;border-radius:6px;margin-bottom:16px;color:#765013}.check-line{display:flex;align-items:flex-start;gap:10px;margin:16px 0;font-size:13px;line-height:1.7}.check-line input{margin-top:5px}.error-text{color:var(--c-red);font-size:12px;line-height:1.7}.log{padding:12px 0;border-bottom:1px solid var(--c-border);font-size:12px;line-height:1.7}.log small{color:var(--c-muted)}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#082f5f;color:white;padding:13px 22px;border-radius:8px;z-index:99;box-shadow:var(--shadow-md);display:none;font-size:13px;max-width:90vw;width:max-content}.landing{max-width:1100px;margin:65px auto;padding:0 28px}.landing-intro h1{font-size:48px;line-height:1.3;margin:14px 0 22px}.landing-intro>p{font-size:16px;line-height:1.9;color:var(--c-muted)}.landing-meta{display:flex;gap:22px;font-size:12px;margin-top:28px;color:var(--c-navy)}.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:40px 0 28px}.entry{text-decoration:none;padding:30px;border-radius:12px;background:white;border:1px solid var(--c-border);color:var(--c-navy);position:relative}.entry-icon{position:absolute;right:28px;top:28px;font-size:40px;color:var(--c-gold)}.entry small{color:var(--c-muted);font-size:12px}.entry h2{font-size:25px;margin:12px 0}.entry p{color:var(--c-muted);font-size:13px;line-height:1.9}.entry strong{display:block;border-top:1px solid var(--c-border);margin-top:26px;padding-top:20px;font-size:14px}.entry strong span{float:right}.teacher-entry{background:var(--c-navy);color:white;border-color:var(--c-navy)}.teacher-entry h2{color:white}.teacher-entry small,.teacher-entry p{color:#bbccdf}.teacher-entry strong{border-color:#3c5879}.landing-note{font-size:13px;color:var(--c-muted);line-height:1.9}.landing-note b{color:var(--c-navy)}.landing-note small{display:block;margin-top:10px;font-size:11px}
.student-body{display:block;overflow:auto;height:auto;min-height:100vh;background:#e5ebf3}.phone{max-width:440px;min-height:100vh;margin:auto;background:#f6f8fc;box-shadow:0 0 70px #082f5f0d}.student-header{height:84px;background:white;padding:0 22px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--c-border)}.student-header .brand{font-size:16px}.student-header .brand img{width:36px;height:36px}.student-content{padding:26px 24px 16px}.student-greeting{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--c-muted);margin-bottom:24px}.student-greeting b{color:var(--c-navy);font-size:14px}.touch-visual{position:relative;margin:4px auto 22px;width:108px;height:108px;background:#e9f0f9;border:1px solid #d7e2f1;border-radius:50%;display:grid;place-items:center}.touch-visual svg{width:64px;height:64px;fill:none;stroke:var(--c-navy);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}.touch-visual.success{color:var(--c-green);background:#e8f6ef;border-color:#cfe6d9;font-size:42px}.student-hero{text-align:center;margin-bottom:24px}.student-hero h1{font-size:25px;margin-bottom:8px}.student-hero p{font-size:12px;color:var(--c-muted);line-height:1.8}.lesson-ticket{border:1px solid var(--c-border);border-radius:12px;background:white;overflow:hidden;margin-bottom:18px}.ticket-head{padding:18px 20px;border-bottom:1px solid var(--c-border)}.ticket-head small{font-size:11px;color:var(--c-muted)}.ticket-head h2{font-size:18px;margin:7px 0}.ticket-head p{font-size:12px;color:var(--c-muted)}.ticket-body{display:grid;grid-template-columns:1fr 1fr;padding:20px}.ticket-body>div+div{padding-left:24px;border-left:1px dashed var(--c-border)}.ticket-body small{display:block;color:var(--c-muted);font-size:11px}.ticket-body strong{display:block;color:var(--c-navy);font-size:30px;line-height:1.4;margin-top:4px;font-variant-numeric:tabular-nums}.ticket-body strong small{font-size:12px;display:inline;color:var(--c-navy)}.ticket-bottom{padding:12px 20px;background:#f8fafc;border-top:1px dashed var(--c-border);display:flex;justify-content:space-between;gap:10px;font-size:11px;color:var(--c-muted)}.student-content .primary{width:100%;padding:15px;font-size:15px;border-radius:9px}.student-content .check-line{font-size:12px}.student-note{font-size:11px;text-align:center;color:var(--c-muted);line-height:1.8;margin-top:14px}.student-footer{text-align:center;padding:8px 24px 22px;color:var(--c-muted);font-size:10px}.student-footer a{display:block;font-size:11px;margin-top:10px}.demo-controls{border-top:1px solid var(--c-border);padding:16px 24px;font-size:11px;color:var(--c-muted)}.demo-controls summary{cursor:pointer}.demo-controls label{display:block;margin-top:16px}.demo-controls select{width:100%;padding:8px;margin:8px 0;border:1px solid var(--c-border);border-radius:5px;background:white}.demo-controls p{margin:10px 0}.demo-controls a{color:var(--c-blue)}.receipt-status{display:flex;justify-content:space-between;gap:8px;padding:14px 18px;background:var(--c-blue-lt);border-radius:8px;color:var(--c-navy);font-size:12px;margin-bottom:18px}.receipt-status.confirmed{background:var(--c-green-lt);color:var(--c-green)}.progress-line{display:flex;justify-content:space-between;font-size:10px;color:var(--c-muted);margin:22px 0}.progress-line .done{color:var(--c-green)}.form-help{font-size:11px;line-height:1.8;color:var(--c-muted);margin:10px 0 18px}
@media(min-width:1500px){.teacher-main{padding-top:36px}.seat{min-height:116px}.classroom-layout{grid-template-columns:minmax(0,1fr) 300px}}
@media(max-width:1050px){.nfc-header{padding:0 22px}.teacher-main{padding:24px 22px}.classroom-layout{grid-template-columns:minmax(0,1fr) 240px;gap:14px}.classroom{padding:18px}.seat-grid{gap:8px}.seat{padding:9px 8px}.seat-top{font-size:10px}.seat b{font-size:13px}.period{padding:12px}.period>span{font-size:10px}.nfc-header nav{gap:12px}.nfc-header>b{display:none}}
@media(max-width:820px){.classroom-layout{grid-template-columns:1fr}.attention{display:none}.teacher-main{padding:20px 16px}.nfc-header{padding:0 16px;height:74px}.nfc-header nav a:last-child{display:none}.title-row{align-items:flex-start}.title-actions{flex-direction:column}.period{display:block}.period>span{display:block;margin-top:6px}.metric{padding:0 16px}.metric-value{font-size:26px}.session-banner{align-items:flex-start}.session-banner small{display:block;margin-left:0;margin-top:4px}.demo-bar{padding:8px 16px}.teacher-foot{display:block}.teacher-foot span{display:block;margin-top:8px}.confirmation{padding:18px}.confirmation button{min-width:160px}.landing{margin:36px auto}.landing-intro h1{font-size:38px}}
@media(max-width:520px){.brand{font-size:15px}.brand img{width:32px;height:32px}.teacher-avatar{display:none}.nfc-header nav a{font-size:11px}.nfc-header{gap:10px}.nfc-header>.demo-chip{font-size:9px}.demo-bar{font-size:9px;gap:8px}.title-row h1{font-size:22px}.title-actions button{font-size:11px;padding:8px}.periods{gap:5px}.period{padding:10px 7px}.period strong{font-size:12px}.period small{font-size:9px}.metrics{padding:14px 0}.metric{padding:0 9px}.metric-label{font-size:10px}.metric-value{font-size:24px}.metric-value small{font-size:10px;margin-left:2px}.metric-detail{font-size:9px}.classroom{padding:15px 10px}.section-heading h2{font-size:14px}.legend{gap:10px;font-size:10px}.seat-grid{gap:5px}.seat{padding:7px 4px;min-height:92px}.seat-top{display:block;font-size:10px}.seat-top span:last-child{display:block;margin-top:3px}.seat b{font-size:11px;margin-top:6px}.seat small{font-size:9px}.confirmation{display:block}.confirmation button{width:100%;margin-top:16px}.entry-grid{grid-template-columns:1fr;gap:16px}.landing-meta{gap:12px;font-size:11px}.landing{padding:0 20px}.landing-intro h1{font-size:34px}.nfc-header>a:last-child:not(.brand){font-size:10px}.student-content{padding:24px 22px 16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Compact classroom mode for landscape tablets: keep the twenty seats close together. */
@media(min-width:821px) and (max-width:1180px) and (max-height:900px){
.nfc-header{height:60px}.demo-bar{padding-top:5px;padding-bottom:5px}.teacher-main{padding:16px 22px}.title-row{margin-bottom:14px}.title-row h1{font-size:24px}.title-row .eyebrow{margin-bottom:4px}.title-row .muted{margin-top:4px}.periods{margin-bottom:10px}.period{padding:8px 12px}.period strong{margin-bottom:2px}.session-banner{padding:9px 14px}.metrics{padding:10px 0;margin:10px 0 14px}.metric-value{font-size:24px}.classroom,.attention{padding:14px}.legend{margin:10px 0}.podium{margin:0 auto 12px;padding:4px}.seat{min-height:77px;padding:7px 9px}.seat b{margin-top:6px}.seat small{margin-top:3px}.seat-caption{margin-top:12px}.todo{padding:12px 0}.rule-note{margin-top:14px}.confirmation{margin-top:14px;padding:16px 20px}
}