:root{--bg:#f1ece4;--surface:#fff;--surface-soft:#fbf9f4;--ink:#141414;--ink-2:#2e2a24;--muted:#4a463e;--line:#eeeae2;--track:#ddd8ce;--primary:#9cc5c7;--primary-strong:#5e9ea1;--primary-ink:#2f6b6e;--mint:#d7e8e9;--coral:#f29a8a;--coral-soft:#f8cfc6;--sand:#ece9e4;--chip:#e7e2d9;--danger-ink:#9a3c2b;--radius-card:24px;--radius-small:16px;--shadow-card:0 8px 22px #3c321e1a;--shadow-float:0 6px 18px #3c321e21;--font-sans:"Noto Sans KR", system-ui, sans-serif;--font-serif:"Noto Serif KR", serif}*{box-sizing:border-box}html,body{margin:0}body{font-family:var(--font-sans);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}button,input,select,textarea{color:inherit;font-family:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:var(--ink)}a:hover{color:var(--primary-ink)}:focus-visible{outline:3px solid var(--primary-ink);outline-offset:2px}.serif{font-family:var(--font-serif);font-weight:700}.muted{color:var(--muted)}.danger{color:var(--danger-ink)}.small{font-size:13px}.tiny{font-size:12px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.admin-page{flex-direction:column;gap:24px;max-width:1440px;min-height:100vh;margin:0 auto;padding:28px 32px 48px;display:flex}@media (width<=720px){.admin-page{padding:16px 16px 40px}}.topbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;display:flex}.brand{align-items:center;gap:12px;display:flex}.brand-name{font-family:var(--font-serif);font-size:20px;font-weight:700}.icon-btn{background:var(--surface-soft);width:52px;height:52px;box-shadow:var(--shadow-float);border:0;border-radius:26px;justify-content:center;align-items:center;display:inline-flex}.pill-nav{background:var(--surface-soft);box-shadow:var(--shadow-float);border-radius:30px;flex-wrap:wrap;gap:6px;padding:6px;display:flex}.pill-nav a,.pill-nav button{border-radius:22px;align-items:center;min-height:44px;padding:11px 16px;font-size:14px;text-decoration:none;display:inline-flex}.pill-nav button{color:var(--ink);font:inherit;cursor:pointer;background:0 0;border:0;font-size:14px}.pill-nav a.active,.pill-nav button.active{background:var(--ink);color:var(--surface-soft);padding:11px 18px;font-weight:700}.page-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;display:flex}.page-head h1{font-family:var(--font-serif);margin:0;font-size:32px;font-weight:700;line-height:1.3}@media (width<=720px){.page-head h1{font-size:26px}}.page-head .date{color:var(--muted);font-size:13px}.actions{flex-wrap:wrap;gap:12px;display:flex}.row{flex-wrap:wrap;align-items:flex-start;gap:20px;display:flex}.grow-2{flex:2 480px;min-width:0}.grow-1{flex:320px;min-width:0}.card{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);flex-direction:column;gap:12px;padding:20px 22px;display:flex}.card h2{font-family:var(--font-serif);margin:0;font-size:18px;font-weight:700}.card-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px;display:flex}.stats{flex-wrap:wrap;gap:14px;display:flex}.stat{border-radius:var(--radius-card);background:var(--surface);box-shadow:var(--shadow-card);flex-direction:column;flex:200px;gap:8px;padding:18px 20px;display:flex}.stat.mint{background:var(--mint);box-shadow:none}.stat.coral{background:var(--coral-soft);box-shadow:none}.stat.sand{background:var(--sand);box-shadow:none}.stat .label{color:var(--ink-2);font-size:13px}.stat .value{font-family:var(--font-serif);font-size:30px;font-weight:700;line-height:1.2}.stat .value small{color:var(--muted);font-size:18px}.stat .sub{color:var(--ink-2);font-size:13px}.list-row{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:10px 0;display:flex}.list-row:last-child{border-bottom:0}.list-row .grow{flex:1;min-width:0}.list-row .title{font-size:14px;font-weight:700}.list-row .sub{color:var(--muted);margin-top:1px;font-size:12px}.empty{color:var(--muted);padding:18px 4px;font-size:14px}.chip{background:var(--chip);white-space:nowrap;border-radius:14px;align-items:center;padding:4px 10px;font-size:12px;font-weight:500;display:inline-flex}.chip.coral{background:var(--coral)}.chip.mint{background:var(--mint)}.progress{background:var(--track);border-radius:3px;height:6px;overflow:hidden}.progress>div{background:var(--primary-strong);border-radius:3px;height:6px}.btn{white-space:nowrap;height:52px;color:var(--ink);border-radius:26px;justify-content:center;align-items:center;gap:8px;padding:0 22px;font-size:15px;font-weight:500;text-decoration:none;display:inline-flex}.btn.sm{border-radius:22px;height:44px;padding:0 16px;font-size:14px}.btn-primary{border:2.5px solid var(--ink);background:var(--primary);box-shadow:0 4px 0 var(--ink);font-weight:700}.btn-primary:active:not(:disabled){box-shadow:0 1px 0 var(--ink);transform:translateY(3px)}.btn-secondary{border:1.5px solid var(--ink);background:var(--surface)}.btn-soft{background:var(--surface-soft);box-shadow:var(--shadow-float);border:0}.btn-link{background:0 0;border:0;height:44px;padding:0 4px;font-size:13px;text-decoration:underline}.field{flex-direction:column;gap:6px;min-width:0;display:flex}.field>span{color:var(--ink-2);font-size:13px;font-weight:500}.input,.select,.textarea{border:1.5px solid var(--track);background:var(--surface-soft);border-radius:24px;width:100%;min-height:48px;padding:0 18px;font-size:15px}.textarea{border-radius:var(--radius-small);resize:vertical;min-height:140px;padding:12px 16px;line-height:1.6}.input:focus,.select:focus,.textarea:focus{border-color:var(--ink);background:var(--surface);outline:none}.form-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;display:grid}.check-grid{flex-wrap:wrap;gap:8px;display:flex}.check{border:1.5px solid var(--track);background:var(--surface-soft);border-radius:22px;align-items:center;gap:8px;min-height:44px;padding:0 14px;font-size:14px;display:inline-flex}.check:has(input:checked){background:var(--primary);border-color:var(--ink);font-weight:700}.check input{width:18px;height:18px;accent-color:var(--primary-ink)}.notice{border-radius:var(--radius-small);background:var(--chip);padding:12px 16px;font-size:14px}.notice.error{background:var(--coral-soft);color:var(--danger-ink)}.notice.ok{background:var(--mint)}.table-wrap{overflow-x:auto}table.table{border-collapse:collapse;width:100%;font-size:14px}.table th{text-align:left;color:var(--muted);border-bottom:1px solid var(--track);white-space:nowrap;padding:8px 10px;font-size:12px;font-weight:500}.table td{border-bottom:1px solid var(--line);vertical-align:middle;padding:10px}.table td.num{font-variant-numeric:tabular-nums}.pin{letter-spacing:2px;font-family:ui-monospace,Consolas,monospace;font-size:18px;font-weight:700}.center-screen{justify-content:center;align-items:center;min-height:100vh;padding:16px;display:flex}.login-card{width:100%;max-width:420px}@media print{body{background:#fff}.no-print{display:none!important}.card{box-shadow:none}}.student-page{max-width:480px;min-height:100dvh;padding:24px 20px calc(110px + env(safe-area-inset-bottom));flex-direction:column;gap:16px;margin:0 auto;display:flex}.s-top{justify-content:space-between;align-items:center;gap:12px;display:flex}.s-progress-pill{background:var(--surface-soft);max-width:230px;height:44px;box-shadow:var(--shadow-float);border-radius:22px;flex:1;align-items:center;gap:10px;padding:0 16px;display:flex}.s-progress-pill span{white-space:nowrap;font-size:13px;font-weight:500}.s-progress-pill .progress{flex:1}.s-hello .date{color:var(--muted);font-size:13px}.s-hello h1{font-family:var(--font-serif);margin:6px 0 0;font-size:28px;font-weight:700;line-height:1.3}.hw-card{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);flex-direction:column;gap:10px;padding:14px 16px;display:flex}.hw-card .head{justify-content:space-between;align-items:flex-start;gap:8px;display:flex}.hw-card .name{font-size:15px;font-weight:700}.hw-card .meta{color:var(--muted);font-size:12px}.hw-card .btns{gap:8px;display:flex}.hw-card .btns>*{flex:1}.btn-card-primary{border:2px solid var(--ink);background:var(--primary);height:46px;color:var(--ink);border-radius:23px;justify-content:center;align-items:center;font-size:14px;font-weight:700;text-decoration:none;display:inline-flex}.btn-card-secondary{border:1.5px solid var(--ink);background:var(--surface);border-radius:23px;justify-content:center;align-items:center;height:46px;font-size:14px;font-weight:500;display:inline-flex}.btn-student{height:60px;box-shadow:0 5px 0 var(--ink);border-radius:30px;width:100%;font-size:18px}.s-dock{padding:12px 20px calc(16px + env(safe-area-inset-bottom));background:linear-gradient(to top, var(--bg) 70%, #f1ece400);position:fixed;bottom:0;left:0;right:0}.s-dock>div{justify-content:space-between;align-items:center;gap:12px;max-width:440px;margin:0 auto;display:flex}.icon-btn.lg{border-radius:28px;width:56px;height:56px}.omr-head{z-index:2;background:var(--bg);flex-direction:column;gap:10px;padding:12px 0 8px;display:flex;position:sticky;top:0}.omr-head .bar{align-items:center;gap:12px;display:flex}.omr-head .t{flex:1;min-width:0}.omr-head .t .name{white-space:nowrap;text-overflow:ellipsis;font-size:16px;font-weight:700;overflow:hidden}.omr-head .t .meta{color:var(--muted);font-size:12px}.omr-list{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:4px 14px}.omr-row{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:10px 0;display:flex}.omr-row:last-child{border-bottom:0}.omr-no{font-variant-numeric:tabular-nums;flex:none;width:52px;font-size:15px;font-weight:700}.omr-no small{color:var(--muted);font-size:11px;font-weight:500;display:block}.omr-choices{flex:1;justify-content:space-between;gap:4px;display:flex}.omr-choice{border:1.5px solid var(--track);background:var(--surface-soft);border-radius:22px;justify-content:center;align-items:center;width:44px;height:44px;padding:0;font-size:20px;line-height:1;display:inline-flex}.omr-choice[aria-pressed=true]{background:var(--primary);border:2px solid var(--ink);font-weight:700}.omr-short{flex:1;align-items:center;gap:6px;min-width:0;display:flex}.omr-short .input{min-height:44px;padding:0 14px}.omr-key{border:1.5px solid var(--track);background:var(--surface-soft);border-radius:22px;flex:none;width:44px;height:44px;font-size:16px}.omr-essay{color:var(--muted);flex:1;font-size:13px}.save-state{color:var(--muted);font-size:12px}.save-state.err{color:var(--danger-ink);font-weight:700}@media (width<=370px){.student-page{padding-left:14px;padding-right:14px}.omr-no{width:44px}.omr-choice{width:40px;height:44px}}.photo-grid{grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:8px;display:grid}.photo-tile{aspect-ratio:3/4;background:var(--sand);border-radius:12px;position:relative;overflow:hidden}.photo-tile img{object-fit:cover;width:100%;height:100%;display:block}.photo-missing{width:100%;height:100%;color:var(--muted);justify-content:center;align-items:center;font-size:12px;display:flex}.photo-remove{border:1.5px solid var(--ink);background:var(--surface);border-radius:16px;width:32px;height:32px;padding:0;font-size:18px;line-height:1;position:absolute;top:4px;right:4px}.photo-remove:after{content:"";position:absolute;inset:-6px}.result-row{border-bottom:1px solid var(--line);flex-direction:column;gap:6px;padding:12px 0;display:flex}.result-row:last-child{border-bottom:0}.result-main{align-items:center;gap:10px;display:flex}.result-answers{word-break:break-all;flex-direction:column;flex:1;gap:2px;min-width:0;font-size:14px;display:flex}.result-actions{flex-wrap:wrap;align-items:center;gap:8px;padding-left:62px;display:flex}.video-frame{aspect-ratio:16/9;background:#000;border-radius:12px;width:100%;position:relative;overflow:hidden}.video-frame iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.video-frame:fullscreen{aspect-ratio:auto;border-radius:0;width:100vw;height:100vh}.video-wrap{flex-direction:column;gap:8px;display:flex}.video-landscape{align-self:flex-start;align-items:center;gap:6px;min-height:44px;display:inline-flex}.problem-img{border:1px solid var(--line);background:#fff;border-radius:12px;width:100%;height:auto}.report-form{flex-direction:column;gap:8px;width:100%;display:flex}.range-list{flex-direction:column;gap:8px;display:flex}.range-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.range-row .input{width:110px;min-height:44px}.range-row .select{width:96px;min-height:44px}.range-row .range-count{min-width:56px}.range-remove{border:1.5px solid var(--ink);background:var(--surface);border-radius:22px;flex:none;width:44px;height:44px;padding:0;font-size:20px;line-height:1;position:relative}.due-input{flex-wrap:wrap;gap:8px;display:flex}.due-input .input{flex:160px}.due-input .select{flex:130px}.video-card{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);color:var(--ink);align-items:center;gap:12px;min-height:76px;padding:14px;text-decoration:none;display:flex}.video-card .play{background:var(--primary);border:1.5px solid var(--ink);width:48px;height:48px;color:var(--ink);border-radius:24px;flex:none;justify-content:center;align-items:center;display:flex}.video-card .play.done{background:var(--mint);color:var(--primary-ink);border-color:#0000}.video-card .body{flex:1;min-width:0}.video-card .kicker{color:var(--primary-ink);font-size:12px;font-weight:700}.video-card .name{text-overflow:ellipsis;white-space:nowrap;font-size:15px;font-weight:700;overflow:hidden}.video-card .meta{color:var(--muted);font-size:12px}.video-card .chip{flex:none}.video-tools{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.watch-bar{align-items:center;gap:10px;font-size:13px;display:flex}.watch-bar .progress{flex:1}.s-tabs{z-index:5;padding:10px 16px calc(14px + env(safe-area-inset-bottom));background:linear-gradient(to top, var(--bg) 70%, #f1ece400);position:fixed;bottom:0;left:0;right:0}.s-tabs>div{background:var(--surface-soft);max-width:440px;box-shadow:var(--shadow-float);border-radius:32px;grid-template-columns:repeat(4,1fr);gap:4px;margin:0 auto;padding:6px;display:grid}.s-tabs a{min-height:56px;color:var(--ink);border-radius:26px;flex-direction:column;justify-content:center;align-items:center;gap:2px;font-size:12px;font-weight:500;text-decoration:none;display:flex}.s-tabs a.active{background:var(--ink);color:var(--surface-soft);font-weight:700}.s-tabs a:focus-visible{outline:2.5px solid var(--primary-strong);outline-offset:2px}.s-page-title{font-family:var(--font-serif);margin:6px 0 0;font-size:26px;font-weight:700;line-height:1.3}.segments{flex-direction:column;display:flex}.segments button{text-align:left;border:0;border-bottom:1px solid var(--line);min-height:48px;font:inherit;color:var(--ink);cursor:pointer;background:0 0;align-items:center;gap:12px;padding:6px 4px;font-size:14px;display:flex}.segments button:last-child{border-bottom:0}.segments .t{font-variant-numeric:tabular-nums;color:var(--primary-ink);min-width:64px;font-weight:700}.segments button.now{background:var(--mint);border-radius:12px}.target-chips{flex-wrap:wrap;gap:8px;display:flex}.name-chip{border:1.5px solid var(--ink);background:var(--surface);min-height:44px;font:inherit;color:var(--ink);cursor:pointer;border-radius:22px;align-items:center;gap:6px;padding:0 16px;font-size:14px;font-weight:500;display:inline-flex}.name-chip[aria-pressed=true]{background:var(--primary);border-width:2px;font-weight:700}.name-chip.all{background:var(--surface-soft);box-shadow:var(--shadow-float);border-color:#0000;font-weight:700}.name-chip.all[aria-pressed=true]{background:var(--ink);color:var(--surface-soft);border-color:var(--ink)}.name-chip:disabled{cursor:not-allowed;opacity:.75}.name-chip:focus-visible{outline:2.5px solid var(--primary-strong);outline-offset:2px}.target-count{color:var(--primary-ink);font-size:14px;font-weight:700}.chip.sand{background:var(--sand);border:1px solid var(--track)}.chip.coral-soft{background:var(--coral-soft)}.chip.ghost{border:1px dashed var(--track);color:var(--muted);background:0 0}.att-counts{flex-wrap:wrap;gap:10px;display:flex}.att-counts>div{border-radius:var(--radius-small);min-width:76px;padding:8px 14px}.att-counts .label{color:var(--ink-2);font-size:12px}.att-counts .value{font-family:var(--font-serif);font-size:24px;font-weight:700;line-height:1.3}.att-sheet{border-collapse:separate;border-spacing:0;font-size:13px}.att-sheet th,.att-sheet td{border-bottom:1px solid var(--line);text-align:center;white-space:nowrap;padding:4px}.att-sheet th{color:var(--muted);font-size:11px;font-weight:500}.att-sheet th.name,.att-sheet td.name{background:var(--surface);text-align:left;z-index:1;padding-right:10px;font-weight:700;position:sticky;left:0}.att-cell{min-width:32px;height:32px;font:inherit;cursor:pointer;background:var(--chip);color:var(--ink);border:0;border-radius:10px;margin:1px;font-size:13px;font-weight:700}.att-cell.mint{background:var(--mint)}.att-cell.sand{background:var(--sand);outline:1px solid var(--track)}.att-cell.coral{background:var(--coral)}.att-cell.coral-soft{background:var(--coral-soft)}.att-cell.ghost{color:var(--muted);outline:1px dashed var(--track);background:0 0}.att-cell[aria-pressed=true]{outline:2.5px solid var(--ink)}.att-cell:focus-visible{outline:2.5px solid var(--primary-strong);outline-offset:1px}.device-page{background:var(--bg);min-height:100vh;color:var(--ink);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:2.5vh;padding:3vh 4vw;display:flex}.device-page .clock{font-family:var(--font-serif);font-variant-numeric:tabular-nums;font-size:clamp(28px,6vh,64px);font-weight:700}.device-page .classes{color:var(--ink-2);font-size:clamp(16px,2.6vh,26px)}.device-page .qr-box{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:2.5vh}.device-page .qr-box canvas{display:block;width:min(52vh,72vw)!important;height:min(52vh,72vw)!important}.device-page .code{letter-spacing:.25em;font-family:ui-monospace,Consolas,monospace;font-size:clamp(40px,9vh,96px);font-weight:700}.device-page .bar{background:var(--track);border-radius:4px;width:min(52vh,72vw);height:8px;overflow:hidden}.device-page .bar>div{background:var(--primary-strong);height:100%}.scanner{border-radius:var(--radius-card);background:var(--ink);aspect-ratio:1;position:relative;overflow:hidden}.scanner video{object-fit:cover;width:100%;height:100%;display:block}.scanner .frame{border:3px solid var(--surface);border-radius:20px;position:absolute;inset:18%;box-shadow:0 0 0 999px #14141459}.code-input{text-align:center;letter-spacing:.4em;height:64px;font-family:ui-monospace,Consolas,monospace;font-size:32px}.ai-card{border-radius:var(--radius-small);background:var(--surface);border:1.5px solid var(--track);flex-direction:column;gap:8px;margin:10px 0;padding:14px 16px;display:flex}.ai-head{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.ai-reasons{margin:0;padding-left:20px;line-height:1.6}.ai-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.ellipsis{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.course-card{border-radius:var(--radius-card);box-shadow:var(--shadow-card);color:var(--ink);flex-direction:column;gap:12px;padding:18px;display:flex}.course-card-main{color:var(--ink);flex-direction:column;gap:10px;text-decoration:none;display:flex}.course-card .kicker{color:var(--ink-2);font-size:12px;font-weight:700}.course-card h2{font-family:var(--font-serif);margin:0;font-size:21px;font-weight:700;line-height:1.3}.course-progress{color:var(--ink-2);align-items:center;gap:10px;font-size:13px;font-weight:700;display:flex}.course-progress .progress{background:#ffffffb3;flex:1}.course-resume{gap:8px;padding:0 16px}.day-chips{flex-wrap:wrap;gap:6px;display:flex}.day-chip{background:var(--surface-soft);min-width:32px;height:28px;color:var(--ink);border-radius:14px;justify-content:center;align-items:center;padding:0 8px;font-size:13px;font-weight:700;display:inline-flex}.day-chip.today{background:var(--ink);color:var(--surface-soft)}.chapter{gap:0;padding:4px 16px}.chapter-head{width:100%;min-height:56px;font:inherit;color:var(--ink);text-align:left;cursor:pointer;background:0 0;border:0;align-items:center;gap:10px;padding:0;display:flex}.chapter-head .grow{flex:1;min-width:0}.chapter-head .name{font-size:16px;font-weight:700}.chev{transition:transform .15s;display:inline-flex}.chev.open{transform:rotate(180deg)}.item-list{border-top:1px solid var(--line);margin:0;padding:0 0 8px;list-style:none}.item-row{border-bottom:1px solid var(--line);min-height:60px;color:var(--ink);align-items:center;gap:12px;padding:8px 4px;text-decoration:none;display:flex}.item-list li:last-child .item-row{border-bottom:0}.item-row.next{background:var(--mint);border-radius:12px}.item-row .play{background:var(--primary);border:1.5px solid var(--ink);border-radius:18px;flex:none;justify-content:center;align-items:center;width:36px;height:36px;display:inline-flex}.item-row .play.done{background:var(--mint);color:var(--primary-ink);border-color:#0000}.item-row .body{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.item-row .title{text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:700;overflow:hidden}.item-row .meta{color:var(--muted);align-items:center;gap:6px;font-size:12px;display:flex}.item-row .chip{flex:none}.badge{background:var(--mint);color:var(--primary-ink);border-radius:8px;padding:1px 6px;font-size:11px;font-weight:700}.badge.class{background:var(--sand);color:var(--ink-2)}.week-bars{grid-template-columns:repeat(7,1fr);align-items:end;gap:6px;height:120px;display:grid}.week-bars .col{height:100%;color:var(--muted);flex-direction:column;align-items:center;gap:4px;font-size:12px;display:flex}.week-bars .bar{background:var(--sand);border-radius:6px;flex-direction:column-reverse;flex:1;width:22px;display:flex;overflow:hidden}.week-bars .vd,.legend.vd{background:var(--primary-strong)}.week-bars .hw,.legend.hw{background:var(--coral)}.legend{vertical-align:-1px;border-radius:3px;width:10px;height:10px;display:inline-block}.record-row{color:var(--ink);align-items:center;min-height:56px;text-decoration:none;flex-direction:row!important}.record-row .grow{flex:1;min-width:0}.record-row .dot{border:1px solid var(--track);border-radius:7px;flex:none;width:14px;height:14px}.course-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;display:grid}.course-admin-card{border-radius:var(--radius-card);box-shadow:var(--shadow-card);flex-direction:column;gap:6px;padding:18px 20px 8px;display:flex}.course-admin-card .main{color:var(--ink);flex-direction:column;gap:8px;text-decoration:none;display:flex}.course-admin-card .kicker{color:var(--ink-2);font-size:12px;font-weight:500}.course-admin-card h2{font-family:var(--font-serif);margin:0;font-size:22px}.course-admin-card .nums{color:var(--ink-2);flex-wrap:wrap;gap:4px 14px;font-size:13px;display:flex}.course-admin-card .order{justify-content:flex-end;display:flex}.course-admin{align-items:flex-start;gap:20px;display:flex}.course-admin-body{flex:1;min-width:0}.side-menu{background:var(--surface-soft);border-radius:var(--radius-small);width:180px;box-shadow:var(--shadow-float);flex-direction:column;flex:none;gap:4px;padding:6px;display:flex;position:sticky;top:16px}.side-menu button{text-align:left;min-height:44px;font:inherit;background:0 0;border:0;border-radius:12px;padding:0 14px;font-size:14px}.side-menu button.active{background:var(--ink);color:var(--surface-soft);font-weight:700}@media (width<=860px){.course-admin{flex-direction:column;align-items:stretch}.side-menu{flex-direction:row;width:auto;position:static}.side-menu button{text-align:center;flex:1}}.chapter-admin{gap:4px;padding:12px 18px}.chapter-admin.drop,.item-admin.drop{outline:2.5px dashed var(--primary-strong);outline-offset:2px}.item-admin{border-bottom:1px solid var(--line);border-radius:8px}.item-admin:last-child{border-bottom:0}.item-admin.is-hidden .title{color:var(--muted)}.grip{cursor:grab;width:28px;min-height:36px;color:var(--muted);flex:none;justify-content:center;align-items:center;display:inline-flex}.grip:active{cursor:grabbing}.row-check{width:20px;height:20px;accent-color:var(--primary-strong);cursor:pointer;flex:none}.sel-bar{z-index:3;border-radius:var(--radius-small);background:var(--surface);box-shadow:var(--shadow-float);flex-wrap:wrap;align-items:center;gap:12px;padding:10px 16px;display:flex;position:sticky;top:8px}.todo-chip{font:inherit;cursor:pointer;border:0;min-height:32px;font-size:12px}.todo-detail{flex-direction:column;gap:4px;padding:0 0 12px 64px;display:flex}.todo-target{align-items:center;gap:10px;min-height:40px;font-size:14px;display:flex}.todo-target .grow{flex:1;min-width:0}.table tr.dirty td{background:var(--mint)}.pick-list{border:1.5px solid var(--track);border-radius:var(--radius-small);background:var(--surface-soft);max-height:280px;overflow-y:auto}.pick-list button{text-align:left;border:0;border-bottom:1px solid var(--line);width:100%;min-height:44px;font:inherit;background:0 0;align-items:center;gap:10px;padding:6px 14px;font-size:14px;display:flex}.pick-list button.on{background:var(--primary);font-weight:700}.pick-list .grow{flex:1;min-width:0}.swatch{border:1px solid var(--track);border-radius:9px;width:18px;height:18px;display:inline-block}.btn.danger{color:var(--danger-ink)}.grade-head{color:var(--ink-2);margin:4px 0 0;font-size:15px;font-weight:700}.book-card{background:var(--surface)}.book-card-main{color:var(--ink);align-items:center;gap:14px;text-decoration:none;display:flex}.book-cover{border:1.5px solid var(--ink);width:56px;height:72px;color:var(--ink-2);border-radius:10px;flex:none;align-items:flex-end;padding:6px;font-size:10px;font-weight:700;line-height:1.2;display:flex}.book-card-main .body{flex-direction:column;flex:1;gap:6px;min-width:0;display:flex}.book-card-main .title{font-family:var(--font-serif);font-size:18px;font-weight:700;line-height:1.3}.book-card-main .meta{color:var(--muted);font-size:13px}.book-card-main .progress{display:block}.book-card-main .progress>span{background:var(--primary-strong);border-radius:3px;height:6px;display:block}.book-search{align-items:center;gap:8px;display:flex}.book-search .input{flex:1;min-width:0}.find-row{min-height:48px;color:var(--ink);border-bottom:1px solid var(--line);align-items:center;gap:10px;text-decoration:none;display:flex}.find-row:last-child{border-bottom:0}.find-row .grow{flex:1;min-width:0}.block-head{color:var(--primary-ink);border-top:1px solid var(--line);padding:10px 4px 4px;font-size:12px;font-weight:700}.book-rows>div:first-child .block-head{border-top:0}.book-rows .item-list{border-top:0;padding-bottom:0}.row-with-action{border-bottom:1px solid var(--line);align-items:center;gap:8px;display:flex}.row-with-action .item-row{border-bottom:0;flex:1;min-width:0}.item-list li:last-child.row-with-action{border-bottom:0}.badge.diff-A{background:var(--mint);color:var(--primary-ink)}.badge.diff-B{background:var(--sand);color:var(--ink-2)}.badge.diff-C{background:var(--coral-soft);color:var(--danger-ink)}.badge.diff-D{background:var(--coral);color:var(--ink)}.btn-link.soft{color:var(--muted);align-items:center;min-height:44px;font-size:12px;display:inline-flex}.pill-tabs{background:var(--surface-soft);box-shadow:var(--shadow-float);border-radius:26px;gap:6px;padding:4px;display:flex}.pill-tabs button{min-height:44px;font:inherit;cursor:pointer;color:var(--ink);background:0 0;border:0;border-radius:22px;padding:0 18px;font-weight:500}.pill-tabs button.active{background:var(--ink);color:var(--surface-soft);font-weight:700}.book-pick{background:#ffffffb3;align-self:flex-start;min-height:36px;padding:4px 10px;font-size:12px}.picker-list{flex-wrap:wrap;gap:6px;max-height:260px;padding:2px;display:flex;overflow:auto}.picker-list .check .tiny{margin-left:2px}.student-books{flex-direction:column;gap:10px;padding:6px 2px;display:flex}.course-card.book-shelf .course-progress .progress{background:var(--track)}.seg-tabs{background:var(--surface-soft);box-shadow:var(--shadow-float);border-radius:24px;gap:4px;padding:4px;display:flex}.seg-tabs button{min-height:44px;font:inherit;color:var(--ink);cursor:pointer;background:0 0;border:0;border-radius:20px;flex:1;justify-content:center;align-items:center;gap:4px;font-size:14px;display:inline-flex}.seg-tabs button.active{background:var(--ink);color:var(--surface-soft);font-weight:700}.new-dot{background:var(--coral);border-radius:4px;width:7px;height:7px;display:inline-block}.new-badge{vertical-align:middle;font-family:var(--font-sans,inherit);letter-spacing:.02em;background:var(--coral);color:var(--ink);border-radius:8px;margin-left:6px;padding:1px 6px;font-size:10px;font-weight:700;display:inline-block}.item-row .play.pending{background:var(--sand);color:var(--muted);border-color:#0000}.item-row .play.locked{background:var(--chip);border-color:#0000}.item-row .meta{flex-wrap:wrap;row-gap:2px}.item-row .meta .pending-text{color:var(--muted);border:1px dashed var(--track);border-radius:8px;padding:0 6px}.row-with-action>.btn{flex:none}.item-row .play,.video-card .play{position:relative}.play .ring{pointer-events:none;width:calc(100% + 10px);height:calc(100% + 10px);position:absolute;inset:-5px;transform:rotate(-90deg)}.play .ring circle{fill:none;stroke:var(--primary-strong);stroke-width:3px;stroke-linecap:round}.new-mark{color:var(--danger-ink);vertical-align:middle;white-space:nowrap;flex:none;align-items:center;gap:4px;margin-left:6px;font-size:11px;font-weight:700;display:inline-flex}.item-row .title-row{align-items:center;min-width:0;display:flex}.item-row .title-row .title{min-width:0}.tab-icon{display:inline-flex;position:relative}.tab-icon .new-dot{border:1.5px solid var(--surface-soft);border-radius:6px;width:9px;height:9px;position:absolute;top:-1px;right:-5px}.class-line{background:var(--surface-soft);min-height:52px;box-shadow:var(--shadow-float);border-radius:26px;align-items:center;gap:10px;padding:4px 6px 4px 16px;font-size:15px;display:flex}.class-line .grow{flex:1}.class-line .btn.sm{flex:none}.home-card{border-radius:var(--radius-card);box-shadow:var(--shadow-card);color:var(--ink);text-align:left;font:inherit;cursor:pointer;border:0;flex-direction:column;gap:6px;width:100%;min-height:44px;padding:16px 18px;text-decoration:none;display:flex}.home-card .row{align-items:center;gap:10px;display:flex}.home-card .title{min-width:0;font-family:var(--font-serif);flex:1;font-size:20px;font-weight:700;line-height:1.3}.home-card .sub{color:var(--ink-2);font-size:13px}.home-card .chip{flex:none}.home-card.small-card{box-shadow:none;cursor:default;padding:12px 18px}.home-card.small-card .title{font-size:16px}.home-card:focus-visible,.home-line:focus-visible{outline:2.5px solid var(--primary-strong);outline-offset:2px}.chev-right{flex:none;display:inline-flex;transform:rotate(-90deg)}.play-dot{background:var(--surface-soft);border:1.5px solid var(--ink);border-radius:18px;flex:none;justify-content:center;align-items:center;width:36px;height:36px;display:inline-flex}.home-line{min-height:44px;color:var(--primary-ink);align-items:center;gap:8px;padding:0 4px;font-size:14px;font-weight:700;text-decoration:none;display:flex}.home-line.resume{color:var(--ink);font-weight:500}.home-line.resume svg{color:var(--primary-ink);flex:none}.tab-badge{background:var(--coral);min-width:18px;height:18px;color:var(--ink);border-radius:9px;justify-content:center;align-items:center;margin-left:4px;padding:0 5px;font-size:11px;font-weight:700;display:inline-flex}.tab-head{font-family:var(--font-serif);margin:4px 2px 0;font-size:18px;font-weight:700}.class-list{flex-direction:column;gap:10px;display:flex}.month-divider{color:var(--muted);align-items:center;gap:10px;margin-top:6px;font-size:13px;font-weight:700;display:flex}.month-divider:after{content:"";background:var(--track);flex:1;height:1px}.class-card{gap:6px;padding:6px 14px 10px}.class-card .item-row{border-bottom:0;padding:6px 0}.class-card .item-row .title{font-size:15px}.seg-chips{flex-wrap:wrap;gap:6px;display:flex}.seg-chip{min-height:32px;color:var(--ink);white-space:normal;padding:4px 12px;text-decoration:none}.seg-chip b{color:var(--primary-ink);font-variant-numeric:tabular-nums}.related-link{color:var(--primary-ink);align-self:flex-start;padding:0 2px;font-size:14px;font-weight:700}.chapter-head .name{display:block}.chapter-progress{align-items:center;gap:8px;max-width:220px;margin-top:4px;display:flex}.chapter-progress .progress{flex:1;display:block}.chapter-progress .progress>span{background:var(--primary-strong);border-radius:3px;height:6px;display:block}.sheet-backdrop{z-index:20;background:#14141459;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.sheet{background:var(--surface);border-radius:var(--radius-card) var(--radius-card) 0 0;width:100%;max-width:480px;max-height:80dvh;padding:12px 18px calc(20px + env(safe-area-inset-bottom));box-shadow:var(--shadow-card);animation:.18s ease-out sheet-up;overflow-y:auto}.sheet-head{justify-content:space-between;align-items:center;gap:8px;padding-bottom:6px;display:flex}.sheet-head .title{font-family:var(--font-serif);font-size:18px;font-weight:700}button.item-row{border:0;border-bottom:1px solid var(--line);width:100%;font:inherit;color:var(--ink);text-align:left;cursor:pointer;background:0 0}.item-row .meta .late{color:var(--danger-ink);font-weight:700}@keyframes sheet-up{0%{opacity:.6;transform:translateY(40px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.sheet{animation:none}}