[hidden]{display:none!important}
:root{--ink:#173b43;--muted:#627477;--teal:#12695d;--line:#d9e1dd;--paper:#fff;--bg:#f4f6f1;--soft:#e7f0e8;--gold:#956525;--red:#a64334}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"PingFang HK","Noto Sans TC",sans-serif;font-size:15px;line-height:1.65}header{padding:22px 4vw;display:flex;align-items:center;gap:26px;background:#fff;border-bottom:1px solid var(--line)}.brand{font-size:22px;font-weight:750;text-decoration:none;color:var(--ink);line-height:1.2}.brand span{display:block;font-size:10px;letter-spacing:1.5px;margin-top:7px;color:var(--muted)}nav{display:flex;gap:8px;margin-left:auto}button,a.button{font:inherit;border:0;cursor:pointer;border-radius:8px;padding:10px 18px;background:var(--teal);color:#fff;font-weight:650;text-decoration:none;display:inline-block}button:hover{filter:brightness(.93)}button:disabled{opacity:.5;cursor:not-allowed}.tab,.secondary{background:transparent;color:var(--ink);border:1px solid var(--line)}.tab.active{background:var(--soft);border-color:var(--soft);color:var(--teal)}.pilot,.badge{font-size:12px;border:1px solid var(--line);border-radius:20px;padding:3px 10px;background:white;white-space:nowrap}.badge.success{background:var(--soft);color:var(--teal);border-color:transparent}.badge.warn{color:var(--gold);background:#fff5df;border-color:transparent}main{max-width:1120px;margin:0 auto;padding:42px 28px 70px;min-height:75vh}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--teal);font-weight:700;margin:0 0 10px}h1{font-size:36px;font-weight:720;letter-spacing:-1px;line-height:1.3;margin:0 0 12px}h2{font-size:22px;line-height:1.4;margin:0 0 12px}h3{font-size:17px;margin:0 0 8px}p{margin:8px 0 14px}.muted{color:var(--muted)}.lead{max-width:750px;font-size:16px;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin:28px 0}.card,.panel{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:26px}.card{border-top:4px solid var(--teal)}.card .chapter{font:500 42px Georgia,serif;color:#afc2b7}.card h2{margin-top:12px}.stats{display:flex;gap:22px;color:var(--muted);margin:22px 0}.stats b{display:block;color:var(--ink);font-size:22px}.steps{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}.steps span{background:#e9eee8;padding:7px 13px;border-radius:6px;font-size:13px}.notice{border-left:3px solid #b89651;background:#fff7e7;border-radius:0 8px 8px 0;padding:13px 17px;margin:20px 0;color:#705729}.notice.demo{border-color:var(--teal);background:var(--soft);color:var(--teal)}.topline{display:flex;align-items:center;justify-content:space-between;gap:15px}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:20px}.list{display:grid;gap:12px}.list-row{display:flex;gap:16px;align-items:center;justify-content:space-between;background:white;border:1px solid var(--line);border-radius:10px;padding:17px 20px}.list-row p{margin:4px 0}.list-row button{white-space:nowrap}label{display:block;font-size:14px;font-weight:650;margin:14px 0 7px}input,select,textarea{font:inherit;width:100%;border:1px solid #b9c9c4;border-radius:7px;padding:10px;background:#fff;color:var(--ink)}textarea{min-height:92px;resize:vertical}input[type=file]{border:1px dashed #9fb6ac;background:#f6faf6}input[type=number]{max-width:130px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.question{margin-top:24px}.question-title{display:flex;gap:12px;align-items:center;margin-bottom:15px}.q-num{height:34px;width:34px;border-radius:50%;background:var(--soft);display:grid;place-items:center;color:var(--teal);font-weight:750;flex:none}.pre{white-space:pre-wrap}.prompt{font-size:14px;color:var(--muted)}details{margin:12px 0;border-top:1px solid var(--line);padding-top:12px}summary{cursor:pointer;font-weight:650;font-size:14px}.preview-grid{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}.preview{width:155px}.preview img{width:100%;height:175px;object-fit:contain;border:1px solid var(--line);background:#edf0eb;cursor:zoom-in}.preview button{font-size:12px;padding:5px 8px;margin-top:5px}.progress{padding:34px;text-align:center}.score{font-size:48px;font-weight:750;line-height:1.1}.score small{font-size:22px;color:var(--muted)}.report-heading{display:flex;justify-content:space-between;align-items:center}.part{padding:20px 0;border-top:1px solid var(--line)}.part-head{display:flex;justify-content:space-between;gap:14px;margin-bottom:12px}.points{font-size:18px;font-weight:750;white-space:nowrap}.part blockquote{margin:12px 0;padding:10px 15px;border-left:3px solid #b7cabe;background:#f5f8f3;color:#435d57}.part .secondary{font-size:13px;padding:7px 11px}.appeal-box{background:#f5f7f2;border:1px solid var(--line);border-radius:10px;padding:18px;margin-top:16px}.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.review-grid .photos{position:sticky;top:20px}.photos img{max-width:100%;border:1px solid var(--line);background:#fff;cursor:zoom-in}.teacher-answer{font-size:13px;background:#f2f5ef;padding:16px;border-radius:8px}.empty{padding:30px;color:var(--muted);text-align:center;border:1px dashed var(--line);border-radius:10px}.error{color:var(--red)}.tiny{font-size:12px;color:var(--muted)}table{border-collapse:collapse;width:100%;font-size:13px;margin:12px 0}th,td{border:1px solid var(--line);padding:7px;text-align:left}footer{max-width:1120px;margin:auto;border-top:1px solid var(--line);padding:22px 28px;display:flex;justify-content:space-between;gap:18px;color:var(--muted);font-size:12px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 20px;border-radius:10px;display:none;max-width:90vw;z-index:10}dialog{border:0;border-radius:12px;padding:20px;max-width:95vw;max-height:95vh}dialog img{max-width:90vw;max-height:80vh}dialog::backdrop{background:#102b35bf}@media(max-width:720px){header{padding:17px;gap:12px;flex-wrap:wrap}.brand{font-size:19px}nav{order:3;width:100%;margin:0}.pilot{margin-left:auto}.cards,.form-grid,.review-grid{grid-template-columns:1fr}main{padding:28px 17px 45px}h1{font-size:29px}.card,.panel{padding:20px}.review-grid .photos{position:static}.list-row{align-items:flex-start;flex-wrap:wrap}.report-heading{align-items:flex-start}.score{font-size:38px}footer{flex-direction:column}.topline{align-items:flex-start}.preview{width:130px}}@media print{header,footer,button,.actions,.appeal-box{display:none}main{padding:0;max-width:none}.panel{border:0}.part{break-inside:avoid}.notice{display:none}}
.scanner{width:min(1100px,96vw);background:#fff;padding:24px}.scan-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:24px}.scan-layout canvas{width:100%;height:auto;touch-action:none;cursor:crosshair;background:#e9ece8}.scan-layout img{max-width:100%;max-height:48vh;object-fit:contain;margin:15px 0}.scan-layout #scan-use{margin-top:12px}.scan-actions{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}.camera-input{display:none}.scan-badge{font-size:11px;color:var(--teal);font-weight:650}@media(max-width:720px){.scan-layout{grid-template-columns:1fr}.scan-layout canvas{max-height:none}.scanner{padding:16px}}

.assignment-qr{display:block;width:200px;height:200px;max-width:100%;object-fit:contain;margin:1rem 0;background:#fff}

.roster-table{overflow-x:auto}.roster-table table{width:100%}select:disabled{opacity:1;color:inherit;background:#f2f0e9}

/* Photo-first submission, readable overview, and touch-safe edge adjustment. */
.text-button{background:transparent;color:var(--teal);padding:10px 8px;text-decoration:underline;text-underline-offset:4px;font-weight:500;min-height:44px}
.submit-bar{position:sticky;bottom:12px;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 20px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 3px 22px #173b431a;margin-top:24px;z-index:2}
.submission-review{width:min(920px,95vw)}.review-thumbnails{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.review-thumbnails img{display:block;width:100%;height:220px;object-fit:contain;background:var(--bg);margin-top:10px}
.overview h2{margin-top:12px}.overview .report-heading{align-items:flex-start;gap:24px}.overview .score{white-space:nowrap;margin-top:24px}.percent{font-size:18px;margin:8px 0;color:var(--teal)}.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;border-top:1px solid var(--line);padding-top:24px;margin-top:22px}.overview a{color:var(--teal)}.next-step{background:var(--soft);padding:20px;border-radius:10px;margin-top:18px}.next-step p{margin-bottom:0}.question-detail>summary{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:17px;min-height:44px}.question-detail>summary::before{content:'＋';color:var(--teal)}.question-detail[open]>summary::before{content:'−'}.question-detail .part{scroll-margin-top:24px}
.scanner{width:min(800px,96vw)}#scan-preview-pane{text-align:center;background:var(--bg);border-radius:8px}#scan-preview-image{max-width:100%;max-height:56vh;object-fit:contain;display:block;margin:auto}#scan-canvas{display:block;width:100%;touch-action:none;cursor:crosshair}.scan-primary{position:sticky;bottom:0;background:#fff;padding:10px 0}.scanner button{min-height:44px}.scanner #scan-status{min-height:2em}.progress progress{width:min(440px,100%);height:12px;accent-color:var(--teal)}
@media(max-width:720px){.overview-grid{grid-template-columns:1fr;gap:18px}.review-thumbnails{grid-template-columns:1fr 1fr}.review-thumbnails img{height:170px}.overview .report-heading{flex-wrap:wrap}.overview .score{margin-top:0}.submit-bar{padding:12px;bottom:4px}.scanner{padding:16px}.scan-primary{gap:7px}.scan-primary button{padding:10px 12px}}
@media print{.submit-bar,.scan-primary{display:none}.overview-grid{grid-template-columns:1fr 1fr}}

/* Assignment dashboards: separate submission, marking and remediation status. */
.dash-assignment{min-width:0}.dash-assignment>.topline{align-items:flex-start;flex-wrap:wrap}.dash-assignment .eyebrow{margin:0;letter-spacing:1px}.dash-assignment .badge{white-space:normal}.dash-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:24px 0}.dash-stats>div{padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:white}.dash-stats b{display:block;font-size:28px;line-height:1.2}.dash-stats span{font-size:13px;color:var(--muted)}.card .dash-stats{gap:6px}.card .dash-stats>div{padding:12px 8px;background:var(--bg);border:0}.card .dash-stats b{font-size:25px}.dash-facts{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}.dash-facts div{min-width:0}.dash-facts dt{font-size:12px;color:var(--muted);margin-bottom:4px}.dash-facts dd{margin:0;font-size:14px}.dash-facts dd .tiny,.dash-table .tiny,.dash-attempt .tiny{display:block}.dash-score{display:block;font-size:23px;font-weight:700;line-height:1.5}.dash-toolbar{display:flex;gap:16px;align-items:flex-end;flex-wrap:wrap;margin-top:28px}.dash-toolbar>div{flex:1;min-width:150px}.dash-toolbar .dash-search{flex:1.5}.dash-toolbar label{margin-top:0}.dash-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:white}.dash-table{margin:0;min-width:880px}.dash-table th{background:var(--soft);font-weight:650;white-space:nowrap}.dash-table td,.dash-table th{border:0;border-bottom:1px solid var(--line);padding:16px 12px;vertical-align:top}.dash-table tbody tr:last-child td{border-bottom:0}.dash-table tbody tr:hover{background:#f8faf7}.dash-table td:first-child{min-width:175px}.dash-table td:nth-child(2){min-width:130px}.dash-table td:nth-child(3){min-width:150px}.dash-table .badge{display:inline-block;margin:0 0 5px;white-space:normal}.dash-row-actions{display:grid;gap:5px}.dash-row-actions button{font-size:13px;padding:8px 12px;min-height:42px;white-space:nowrap}.dash-name{padding:0;background:transparent;color:var(--teal);text-decoration:underline;text-underline-offset:4px;text-align:left;min-height:34px}.dash-history{margin-top:24px}.dash-attempt{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}.dash-attempt .actions{margin:0;justify-content:flex-end}.dash-attempt .dash-score{font-size:18px}.dash-attempt-list{max-height:480px;overflow-y:auto}.dash-history summary{min-height:40px}.dash-toolbar button{min-height:47px}
@media(max-width:920px){.dash-stats{gap:8px}.dash-stats>div{padding:12px}.dash-assignment .actions button{flex-grow:1}.dash-assignment h2{font-size:20px}}
@media(max-width:520px){.dash-facts{gap:16px 10px}.dash-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.card .dash-stats{grid-template-columns:repeat(4,minmax(0,1fr))}.dash-stats b{font-size:25px}.dash-toolbar>div{min-width:120px}.dash-toolbar .dash-search{flex-basis:100%}.dash-attempt{flex-wrap:wrap}.dash-attempt .actions{justify-content:flex-start}.dash-row-actions button{min-height:44px}}

.compact-report-overview{display:grid;grid-template-columns:160px 1fr;gap:28px}.compact-report-overview h3{margin-top:0}.compact-report-overview p{line-height:1.85}.report-downloads{margin-top:22px}.learning-target{background:#eef5f8;padding:14px 18px;border-radius:10px}.learning-feedback{background:#edf5f1;padding:14px 18px;border-radius:10px;margin-top:20px}.learning-target p,.learning-feedback p{margin:6px 0}.criterion{border-top:1px solid #dce5e4;padding:18px 0}.criterion li{margin:8px 0}mark.earned{background:#e0eee5;color:inherit}mark.lost{background:#fff0d0;color:inherit}.original .preview-grid img{max-width:100%;max-height:600px;height:auto;object-fit:contain;cursor:zoom-in}.question-detail>summary{font-size:1.3rem}.part{scroll-margin-top:80px}@media(max-width:700px){.compact-report-overview{grid-template-columns:1fr;gap:18px}}

.dash-table td { padding: .65rem .75rem; }
.dash-table .tiny { margin: .15rem 0; }
.notice h2 { color: #9b2828; }