:root{--ink:#14213d;--blue:#1d4ed8;--sky:#eff6ff;--red:#b91c1c;--border:#cbd5e1;--muted:#64748b;--ok:#047857}*{box-sizing:border-box}body{color:var(--ink);background:#f8fafc;margin:0;font:16px/1.5 system-ui,-apple-system,Noto Sans TC,sans-serif}header{color:#fff;background:linear-gradient(120deg,#102a43,#1d4ed8);justify-content:space-between;align-items:center;gap:15px;padding:20px max(20px,50vw - 480px);display:flex}header h1{margin:0;font-size:clamp(1.1rem,3vw,1.55rem)}header p{color:#dbeafe;margin:2px 0 0;font-size:.9rem}.tag{color:#fef3c7;white-space:nowrap;border:1px solid #fbbf24;border-radius:99px;padding:3px 9px;font-size:.76rem;font-weight:800}main{max-width:720px;margin:0 auto;padding:28px 18px 60px}.card{border:1px solid var(--border);background:#fff;border-radius:16px;padding:clamp(20px,4vw,34px);box-shadow:0 8px 24px #0f172a0b}h2{margin-top:0;font-size:1.35rem}label{margin:14px 0 6px;font-weight:700;display:block}input,textarea,select{border:1px solid var(--border);width:100%;font:inherit;background:#fff;border-radius:9px;padding:11px 12px}textarea{resize:vertical;min-height:120px}button,.button{font:inherit;cursor:pointer;background:var(--blue);color:#fff;border:0;border-radius:9px;padding:11px 16px;font-weight:800;text-decoration:none;display:inline-block}button:hover{filter:brightness(.93)}button:disabled{cursor:not-allowed;opacity:.55}.secondary{color:var(--ink);background:#e2e8f0}.danger{background:var(--red)}.note{color:#713f12;background:#fffbeb;border-left:4px solid #f59e0b;border-radius:5px;margin:18px 0;padding:12px 14px}.error{color:#991b1b;background:#fef2f2;border-radius:7px;margin-top:14px;padding:10px 12px}.hidden{display:none!important}.intro ul{padding-left:20px}.meta{color:var(--muted);justify-content:space-between;gap:10px;font-size:.9rem;font-weight:700;display:flex}.progress{background:#e2e8f0;border-radius:9px;height:9px;margin:13px 0 28px;overflow:hidden}.progress>*{background:var(--blue);height:100%;transition:width .25s}.timer{color:#1d4ed8;background:#eff6ff;border:7px solid #93c5fd;border-radius:50%;place-items:center;width:92px;height:92px;margin:0 auto 20px;font-size:2rem;font-weight:900;display:grid}.timer.urgent{color:#b91c1c;background:#fff1f2;border-color:#fca5a5}.prompt{word-break:break-word;margin:0 0 6px;font-size:clamp(1.35rem,5vw,2rem);line-height:1.25}.instruction{color:var(--muted);margin:0 0 21px}.choices{gap:10px;display:grid}.choice{border:2px solid var(--border);color:var(--ink);text-align:left;background:#fff;min-height:55px;padding:16px}.choice:hover{border-color:var(--blue);background:var(--sky)}.choice .letter{color:var(--blue);width:30px;font-weight:900;display:inline-block}.finish{text-align:center}.score{color:var(--blue);font-size:4rem;font-weight:900;line-height:1}.admin-main{max-width:1200px}.admin-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.admin-wide{grid-column:1/-1}.stats{flex-wrap:wrap;gap:12px;display:flex}.stat{background:var(--sky);border-radius:10px;min-width:135px;padding:12px}.stat b{font-size:1.45rem;display:block}.toolbar{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.table-wrap{border:1px solid var(--border);border-radius:10px;margin-top:15px;overflow:auto}table{border-collapse:collapse;width:100%;font-size:.87rem}th,td{text-align:left;vertical-align:top;border-bottom:1px solid #e2e8f0;padding:9px}th{white-space:nowrap;background:#f8fafc}td a{color:var(--blue)}.small{color:var(--muted);font-size:.85rem}dialog{border:0;border-radius:15px;width:min(700px,94vw);padding:0;box-shadow:0 20px 60px #0f172a55}dialog::backdrop{background:#0f172a66}.dialog-body{padding:24px}.form-grid{grid-template-columns:1fr 1fr;gap:0 14px;display:grid}.form-grid .full{grid-column:1/-1}@media (max-width:720px){header{padding:15px 18px}.admin-grid{grid-template-columns:1fr}.admin-wide{grid-column:auto}.card{padding:20px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.choices{gap:8px}.choice{padding:14px 11px}.timer{width:78px;height:78px;font-size:1.65rem}}html{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:is(button:focus-visible,a:focus-visible){outline-offset:3px;outline:3px solid #f59e0b}.fake-ids{color:#1e40af;font-family:ui-monospace,monospace}.screen-note{color:#64748b;font-size:.85rem}.retry{margin-top:12px}.choices button{touch-action:manipulation}@media (hover:none){.choice:hover{border-color:var(--border);filter:none;background:#fff}.choice:active{border-color:var(--blue);background:var(--sky)}}@media (max-width:720px){.exam-card .choice{min-height:48px;padding:9px;font-size:.86rem;line-height:1.3}.exam-card .timer{border-width:5px;width:54px;height:54px;margin-bottom:12px;font-size:1.35rem}.exam-card .progress{height:6px;margin:10px 0 14px}.exam-card .prompt{font-size:1.15rem;line-height:1.35}.exam-card .instruction{margin-bottom:12px;font-size:.9rem}.exam-card .screen-note{margin:12px 0 0;font-size:.75rem}.exam-card{padding:16px}}