:root{--primary:#276BC1;--dark:#284F91;--light:#EAF2FC;--text:#111827;--muted:#667085;--border:#d9e1ec;--danger:#b42318;--success:#067647;--bg:#f6f8fb}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary);text-decoration:none}.topbar{height:76px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:10px clamp(16px,4vw,54px);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:12px;color:var(--text)}.brand img{width:54px;height:54px;object-fit:contain}.brand span{display:flex;flex-direction:column}.brand strong{font-size:19px;letter-spacing:.8px;color:var(--dark)}.brand small{color:var(--muted);font-size:12px}.userbox{display:flex;align-items:center;gap:16px;font-size:14px}.nav{background:#fff;border-bottom:1px solid var(--border);padding:0 clamp(16px,4vw,54px);display:flex;gap:6px;overflow:auto}.nav a{padding:12px 14px;color:#475467;font-weight:600;font-size:14px;border-bottom:3px solid transparent}.nav a.active{color:var(--primary);border-color:var(--primary)}.container{width:min(1180px,calc(100% - 32px));margin:28px auto 50px}.footer{text-align:center;color:#98a2b3;padding:30px}.grid{display:grid;gap:18px}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.card{background:#fff;border:1px solid var(--border);border-radius:15px;padding:20px;box-shadow:0 2px 10px rgba(16,24,40,.035)}.metric .label{color:var(--muted);font-size:13px}.metric .value{font-size:30px;font-weight:800;margin-top:5px;color:var(--dark)}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:20px}.page-head h1{margin:0;font-size:27px}.page-head p{margin:5px 0 0;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:9px;padding:10px 14px;font-weight:700;font-size:14px;cursor:pointer}.btn-primary{background:var(--primary);color:#fff}.btn-secondary{background:#fff;color:var(--dark);border-color:var(--border)}.btn-danger{background:#fff1f0;color:var(--danger);border-color:#fecdca}.form-group{margin-bottom:16px}.form-group label{display:block;font-weight:700;font-size:13px;margin-bottom:7px}.input,select,textarea{width:100%;border:1px solid #cfd8e6;background:#fff;border-radius:9px;padding:10px 12px;font:inherit;outline:none}.input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(39,107,193,.12)}.help{color:var(--muted);font-size:12px;margin-top:5px}.alert{padding:12px 14px;border-radius:9px;margin-bottom:16px;border:1px solid}.alert.success{background:#ecfdf3;border-color:#abefc6;color:#067647}.alert.error{background:#fef3f2;border-color:#fecdca;color:#b42318}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--border);border-radius:14px}.table{width:100%;border-collapse:collapse;min-width:720px}.table th,.table td{text-align:left;padding:13px 14px;border-bottom:1px solid #eaecf0;font-size:14px}.table th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:#667085;background:#f9fafb}.badge{display:inline-flex;padding:4px 8px;border-radius:999px;font-size:12px;font-weight:700}.badge.green{background:#ecfdf3;color:#067647}.badge.blue{background:#eff8ff;color:#175cd3}.badge.gray{background:#f2f4f7;color:#475467}.badge.orange{background:#fffaeb;color:#b54708}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 10% 10%,#e8f2ff 0,#f6f8fb 42%)}.login-card{width:min(440px,100%);background:#fff;border:1px solid var(--border);border-radius:18px;padding:30px;box-shadow:0 18px 50px rgba(17,24,39,.08)}.login-logo{display:block;width:96px;height:96px;object-fit:contain;margin:0 auto 8px}.login-card h1{text-align:center;margin:8px 0 5px;color:var(--dark)}.login-card .sub{text-align:center;color:var(--muted);margin:0 0 24px}.section-banner{border-radius:13px;padding:16px 18px}.reading{background:#eff8ff;border:1px solid #b2ddff}.listening{background:#eef4ff;border:1px solid #c7d7fe}.answer-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.answer-item{border:1px solid var(--border);padding:10px;border-radius:9px;background:#fff}.answer-item label{font-size:12px;font-weight:800;color:#475467}.answer-item select{margin-top:5px}.fixed-structure{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:15px 0}.fixed-structure div{padding:12px;border-radius:10px;background:var(--light);text-align:center}.fixed-structure b{display:block;color:var(--dark);font-size:18px}.muted{color:var(--muted)}@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr)}.answer-grid{grid-template-columns:repeat(4,1fr)}}@media(max-width:640px){.grid-4,.grid-2{grid-template-columns:1fr}.page-head{align-items:flex-start;flex-direction:column}.answer-grid{grid-template-columns:repeat(2,1fr)}.fixed-structure{grid-template-columns:1fr}.brand small{display:none}.userbox span{display:none}}

/* OMR scanner / review */
.omr-upload-grid{align-items:start}.compact-grid{gap:12px}.capture-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}.capture-box{display:flex;flex-direction:column;gap:5px;padding:16px;border:1.5px dashed #9ab9df;border-radius:12px;background:#f8fbff;cursor:pointer}.capture-box:hover{border-color:var(--primary);background:#eff6ff}.capture-box strong{color:var(--dark)}.capture-box span{font-size:12px;color:var(--muted)}.capture-box input{margin-top:8px;width:100%}.omr-preview-wrap{border:1px solid var(--border);border-radius:12px;background:#f2f4f7;padding:10px;margin:0 0 16px;text-align:center}.omr-preview-wrap img{max-width:100%;max-height:420px;object-fit:contain;border-radius:8px;background:#fff}.omr-tip{font-size:13px}.workflow-list{display:grid;gap:12px}.workflow-list>div{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid #e5eaf1;border-radius:11px}.workflow-list>div>b{display:grid;place-items:center;flex:0 0 30px;height:30px;border-radius:50%;background:var(--primary);color:#fff}.workflow-list span{display:flex;flex-direction:column;gap:3px}.workflow-list small{color:var(--muted);line-height:1.4}.omr-review-layout{display:grid;grid-template-columns:minmax(360px,.9fr) minmax(500px,1.1fr);gap:18px;align-items:start}.omr-image-card{padding:14px}.omr-sticky{position:sticky;top:112px}.omr-image-stage{height:72vh;min-height:520px;border:1px solid var(--border);border-radius:12px;background:#20242a;overflow:auto;display:flex;align-items:flex-start;justify-content:center;padding:12px}.omr-image-stage img{width:100%;height:auto;object-fit:contain;background:#fff}.scan-meta{display:flex;gap:12px;flex-wrap:wrap;padding-top:12px;color:#475467;font-size:13px}.bubble-answer-list{display:grid;grid-template-columns:1fr 1fr;gap:8px}.bubble-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 9px;background:#fff;border:1px solid var(--border);border-radius:9px}.bubble-row>b{min-width:32px;font-size:13px}.bubble-options{display:flex;align-items:center;gap:5px;flex-wrap:wrap;justify-content:flex-end}.bubble-options label{cursor:pointer}.bubble-options input{position:absolute;opacity:0;pointer-events:none}.bubble-options span{display:grid;place-items:center;min-width:30px;height:30px;border:1px solid #cfd8e6;border-radius:999px;background:#fff;font-size:12px;font-weight:800;color:#475467;transition:.15s}.bubble-options input:checked+span{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 0 0 2px rgba(39,107,193,.12)}.bubble-options .blank-option span{border-radius:7px;min-width:48px;padding:0 7px;font-weight:700}.bubble-options .blank-option input:checked+span{background:#667085;border-color:#667085}.review-actions{display:flex;justify-content:space-between;gap:12px;margin-top:18px;position:sticky;bottom:0;background:#fff;padding:12px 0 0}.answer-progress{display:flex;align-items:baseline;gap:4px;white-space:nowrap}.answer-progress strong{font-size:24px;color:var(--primary)}.answer-progress span{font-size:12px;color:var(--muted)}.score-card{border-color:#b7d4f5;background:linear-gradient(135deg,#fff,#f5f9ff)}.score-main{display:flex;justify-content:space-between;align-items:center;gap:12px}.score-main>div{display:flex;flex-direction:column}.score-main span:first-child{font-size:12px;color:var(--muted)}.score-main strong{font-size:28px;color:var(--dark)}.score-sections{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:14px}.score-sections>div{padding:10px;border:1px solid #dbe8f8;border-radius:9px;background:#fff;display:flex;flex-direction:column}.score-sections span{font-size:11px;color:var(--muted)}.score-sections b{font-size:15px;color:var(--dark);margin-top:3px}
@media(max-width:1000px){.omr-review-layout{grid-template-columns:1fr}.omr-sticky{position:static}.omr-image-stage{height:55vh;min-height:360px}.bubble-answer-list{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.capture-actions,.bubble-answer-list,.score-sections{grid-template-columns:1fr}.omr-image-stage{height:48vh;min-height:300px}.bubble-row{align-items:flex-start;flex-direction:column}.bubble-options{justify-content:flex-start}.review-actions{flex-direction:column}.review-actions .btn{width:100%}}

/* Automatic OMR capture, crop and OpenCV detection */
.scan-source-actions{display:flex;gap:9px;flex-wrap:wrap;margin:10px 0 14px}.camera-panel{position:relative;border:1px solid var(--border);border-radius:14px;background:#101318;padding:12px;margin:12px 0 16px}.camera-panel video{display:block;width:100%;max-height:560px;object-fit:contain;border-radius:9px;background:#000}.camera-guide{position:absolute;inset:24px 28px 82px;border:2px dashed rgba(255,255,255,.9);border-radius:8px;pointer-events:none}.camera-guide span{position:absolute;left:50%;bottom:10px;transform:translateX(-50%);white-space:nowrap;max-width:90%;overflow:hidden;text-overflow:ellipsis;background:rgba(0,0,0,.62);color:#fff;padding:6px 9px;border-radius:6px;font-size:12px}.crop-panel{border:1px solid #b9d3f1;border-radius:14px;background:#f7fbff;padding:12px;margin:14px 0}.crop-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:10px}.crop-head>div{display:flex;flex-direction:column;gap:4px}.crop-head small{color:var(--muted);line-height:1.45}.crop-canvas-wrap{overflow:auto;background:#1c2026;border-radius:10px;padding:10px;text-align:center;touch-action:none}.crop-canvas-wrap canvas{display:inline-block;max-width:100%;height:auto;cursor:crosshair;touch-action:none;user-select:none}.auto-detect-btn{min-width:220px}.student-found-card{border-color:#b7d4f5}.detect-summary{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin-bottom:18px}.metric-mini{background:#fff;border:1px solid var(--border);border-radius:12px;padding:13px 14px;display:flex;flex-direction:column;gap:5px}.metric-mini span{font-size:12px;color:var(--muted)}.metric-mini strong{font-size:24px;color:var(--dark)}.metric-mini.warn{border-color:#f5c86c;background:#fffbeb}.metric-mini.warn strong{color:#b54708}.metric-mini.good{border-color:#abefc6;background:#f2fff7}.metric-mini.good strong{color:#067647}.image-tabs{display:flex;gap:6px;margin-bottom:9px}.image-tabs button{border:1px solid var(--border);background:#fff;color:#475467;border-radius:8px;padding:7px 10px;font-weight:700;cursor:pointer}.image-tabs button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.auto-review-layout{grid-template-columns:minmax(390px,.9fr) minmax(620px,1.25fr)}.detection-section h3{margin:0 0 12px}.section-gap{margin-top:16px}.detection-table-wrap{overflow:auto;border-radius:10px}.detection-table{width:100%;border-collapse:collapse;background:#fff;min-width:570px}.detection-table th,.detection-table td{padding:8px 9px;border-bottom:1px solid #e5eaf1;text-align:left;font-size:12px;vertical-align:middle}.detection-table th{text-transform:uppercase;letter-spacing:.04em;color:#667085;background:rgba(255,255,255,.6);font-size:10px}.detection-table tr.flagged-row{background:#fff8e5}.detected-choice{display:inline-grid;place-items:center;min-width:34px;height:30px;border-radius:999px;background:#eaf7ee;color:#067647;font-weight:900}.detected-choice.bad{background:#fff1f0;color:#b42318;border-radius:7px;padding:0 7px}.confidence-meter{display:inline-block;width:70px;height:7px;background:#e8edf4;border-radius:999px;overflow:hidden;vertical-align:middle;margin-right:5px}.confidence-meter i{display:block;height:100%;background:#276BC1;border-radius:999px}.detection-table small{color:#667085}.final-answer-select{min-width:130px;padding:7px 8px;border-radius:7px}.final-answer-select.needs-review{border-color:#e9a93d;box-shadow:0 0 0 2px rgba(233,169,61,.12)}.auto-detection-form .review-actions{align-items:center}.auto-detection-form .review-actions .help{max-width:55%}
@media(max-width:1100px){.detect-summary{grid-template-columns:repeat(3,1fr)}.auto-review-layout{grid-template-columns:1fr}.omr-sticky{position:static}}
@media(max-width:640px){.scan-source-actions{display:grid;grid-template-columns:1fr}.scan-source-actions .btn{width:100%}.crop-head{flex-direction:column}.detect-summary{grid-template-columns:repeat(2,1fr)}.auto-detection-form .review-actions .help{max-width:none}.camera-guide{inset:18px 18px 80px}.camera-guide span{font-size:10px}}