:root{--bg: #f4f6fb;--surface: #ffffff;--surface-2: #f8fafc;--border: #e2e8f0;--border-strong: #cbd5e1;--text: #0f172a;--text-muted: #64748b;--text-faint: #94a3b8;--brand: #2563eb;--brand-dark: #1d4ed8;--brand-soft: #eff4ff;--success: #16a34a;--success-soft: #ecfdf3;--danger: #dc2626;--danger-soft: #fef2f2;--warning: #d97706;--warning-soft: #fffbeb;--radius: 12px;--radius-sm: 8px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow: 0 4px 16px rgba(15, 23, 42, .08);--shadow-lg: 0 12px 32px rgba(15, 23, 42, .12);--maxw: 1120px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.55}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{line-height:1.25;margin:0 0 .4em}h1{font-size:1.6rem}h2{font-size:1.25rem}h3{font-size:1.05rem}p{margin:0 0 .8em}.container{max-width:var(--maxw);margin:0 auto;padding:24px}.stack{display:flex;flex-direction:column}.row{display:flex;align-items:center}.wrap{flex-wrap:wrap}.between{justify-content:space-between}.center{justify-content:center;align-items:center}.gap-1{gap:8px}.gap-2{gap:16px}.gap-3{gap:24px}.grow{flex:1}.muted{color:var(--text-muted)}.faint{color:var(--text-faint)}.small{font-size:.85rem}.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}.hidden{display:none}.grid{display:grid;gap:20px}.grid-cards{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.navbar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.navbar .inner{max-width:var(--maxw);margin:0 auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-weight:800;font-size:1.1rem;color:var(--text);display:flex;align-items:center;gap:8px}.brand .dot{width:12px;height:12px;border-radius:4px;background:var(--brand);display:inline-block}.navlinks{display:flex;align-items:center;gap:6px}.navlinks a{color:var(--text-muted);padding:8px 12px;border-radius:8px;font-weight:500}.navlinks a.active,.navlinks a:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:20px}.card.hover:hover{box-shadow:var(--shadow);transform:translateY(-2px);transition:.15s}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.panel .panel-head{padding:16px 20px;border-bottom:1px solid var(--border);font-weight:600}.panel .panel-body{padding:20px}.divider{height:1px;background:var(--border);margin:16px 0;border:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;cursor:pointer;padding:10px 16px;border-radius:var(--radius-sm);border:1px solid transparent;background:var(--brand);color:#fff;transition:background .15s,box-shadow .15s,opacity .15s}.btn:hover{background:var(--brand-dark);text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.secondary{background:var(--surface);color:var(--text);border-color:var(--border-strong)}.btn.secondary:hover{background:var(--surface-2)}.btn.ghost{background:transparent;color:var(--brand)}.btn.ghost:hover{background:var(--brand-soft)}.btn.danger{background:var(--danger)}.btn.danger:hover{background:#b91c1c}.btn.sm{padding:6px 12px;font-size:.85rem}.btn.xs{padding:3px 9px;font-size:.78rem}.btn.lg{padding:13px 22px;font-size:1.02rem}.btn.block{width:100%}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field label{font-weight:600;font-size:.9rem}.input,.textarea,.select{font:inherit;padding:10px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);width:100%}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}.textarea{resize:vertical;min-height:96px;font-family:var(--font)}.textarea.code{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:.82rem;min-height:220px}.badge{display:inline-flex;align-items:center;gap:5px;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;text-transform:uppercase;letter-spacing:.03em}.badge.brand{background:var(--brand-soft);color:var(--brand-dark)}.badge.green{background:var(--success-soft);color:var(--success)}.badge.amber{background:var(--warning-soft);color:var(--warning)}.badge.red{background:var(--danger-soft);color:var(--danger)}.badge.gray{background:var(--surface-2);color:var(--text-muted)}.option{display:flex;align-items:flex-start;gap:12px;width:100%;text-align:left;padding:13px 15px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);cursor:pointer;font:inherit;color:var(--text);transition:border-color .12s,background .12s}.option:hover{border-color:var(--border-strong);background:var(--surface-2)}.option.selected{border-color:var(--brand);background:var(--brand-soft)}.option .key{flex:none;width:26px;height:26px;border-radius:50%;border:1.5px solid var(--border-strong);display:grid;place-items:center;font-weight:700;font-size:.85rem;color:var(--text-muted)}.option.selected .key{background:var(--brand);border-color:var(--brand);color:#fff}.option.correct{border-color:var(--success);background:var(--success-soft)}.option.correct .key{background:var(--success);border-color:var(--success);color:#fff}.option.incorrect{border-color:var(--danger);background:var(--danger-soft)}.option.incorrect .key{background:var(--danger);border-color:var(--danger);color:#fff}.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.05rem;padding:6px 12px;border-radius:8px;background:var(--surface-2);border:1px solid var(--border)}.timer.warn{background:var(--warning-soft);color:var(--warning);border-color:#fde68a}.timer.danger{background:var(--danger-soft);color:var(--danger);border-color:#fecaca}.palette{display:flex;flex-wrap:wrap;gap:8px}.pal-btn{width:38px;height:38px;border-radius:8px;border:1.5px solid var(--border);background:var(--surface);font-weight:700;cursor:pointer;color:var(--text-muted);position:relative}.pal-btn.answered{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-dark)}.pal-btn.current{outline:2px solid var(--brand);outline-offset:2px}.pal-btn.flagged:after{content:"";position:absolute;top:-3px;right:-3px;width:10px;height:10px;background:var(--warning);border-radius:50%}.stimulus{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;white-space:pre-wrap;line-height:1.7}.stimulus h4{margin-top:0}.score-hero{text-align:center;padding:8px}.score-big{font-size:3.4rem;font-weight:800;letter-spacing:-.02em;line-height:1}.meter{height:10px;background:var(--surface-2);border-radius:999px;overflow:hidden;border:1px solid var(--border)}.meter>span{display:block;height:100%;background:var(--brand);border-radius:999px}table.tbl{width:100%;border-collapse:collapse}table.tbl th,table.tbl td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--border)}table.tbl th{font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;color:var(--text-muted)}table.tbl tr:last-child td{border-bottom:0}.center-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:400px}.alert{padding:12px 14px;border-radius:var(--radius-sm);font-size:.9rem;margin-bottom:12px}.alert.error{background:var(--danger-soft);color:var(--danger);border:1px solid #fecaca}.alert.info{background:var(--brand-soft);color:var(--brand-dark);border:1px solid #dbeafe}.alert.success{background:var(--success-soft);color:var(--success);border:1px solid #bbf7d0}.spinner{width:34px;height:34px;border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.kbd{font-family:ui-monospace,monospace;background:var(--surface-2);border:1px solid var(--border);border-bottom-width:2px;border-radius:6px;padding:1px 6px;font-size:.8rem}.pill-tabs{display:inline-flex;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:4px;gap:4px}.pill-tabs button{border:0;background:transparent;padding:6px 14px;border-radius:999px;font:inherit;font-weight:600;color:var(--text-muted);cursor:pointer}.pill-tabs button.active{background:var(--surface);color:var(--brand-dark);box-shadow:var(--shadow-sm)}.ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.exam-grid{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start;width:100%}.exam-side{position:sticky;top:80px}.exam-secure,.exam-content{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}.exam-content input,.exam-content textarea{-webkit-user-select:text;user-select:text}.watermark{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:40;background-repeat:repeat}.audio-once{background:var(--brand-soft);border:1px solid #dbeafe;border-radius:var(--radius);padding:14px 16px}.audio-once.directions{background:#fffbeb;border-color:#fde68a}.sec-step{font-size:.8rem;font-weight:600;padding:5px 12px;border-radius:999px;border:1px solid var(--border);color:var(--text-muted);background:var(--surface-2);white-space:nowrap}.sec-step.active{background:var(--brand);color:#fff;border-color:var(--brand)}.sec-step.locked{color:var(--text-faint)}.sec-step.pending{opacity:.65}.exam-cam{position:fixed;bottom:16px;right:16px;width:150px;height:112px;border-radius:12px;overflow:hidden;background:#000;border:2px solid var(--danger);box-shadow:var(--shadow-lg);z-index:45}.exam-cam video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.exam-cam-dot{position:absolute;top:8px;left:8px;width:10px;height:10px;border-radius:50%;background:var(--danger);animation:pulse 1.6s infinite}@keyframes pulse{0%{box-shadow:0 0 #dc262699}70%{box-shadow:0 0 0 8px #dc262600}to{box-shadow:0 0 #dc262600}}.proctor-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a99;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:60;padding:24px}.violation-toast{position:fixed;top:70px;left:50%;transform:translate(-50%);background:var(--danger);color:#fff;padding:10px 18px;border-radius:999px;font-weight:600;font-size:.9rem;z-index:70;box-shadow:var(--shadow-lg)}.fs-banner{background:var(--warning-soft);color:var(--warning);border-bottom:1px solid #fde68a;padding:8px 16px;display:flex;gap:12px;align-items:center;justify-content:center;font-size:.85rem;font-weight:600}@media (max-width: 900px){.exam-grid{grid-template-columns:1fr}.exam-side{position:static;order:2}}@media (max-width: 640px){.container{padding:16px}h1{font-size:1.35rem}.navbar .inner{padding:10px 14px;gap:8px}.navlinks{gap:2px}.navlinks a{padding:6px 8px;font-size:.9rem}.hide-sm{display:none}.score-big{font-size:2.6rem}.exam-cam{width:104px;height:78px;bottom:8px;right:8px}table.tbl{font-size:.85rem}table.tbl th:nth-child(3),table.tbl td:nth-child(3){display:none}.card{padding:16px}.grid{gap:14px}}