:root{--bg: #f1f5f9;--card: #ffffff;--primary: #4f46e5;--primary-d: #4338ca;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--green: #16a34a;--red: #dc2626;--amber: #d97706}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}.wrap{max-width:640px;margin:0 auto;padding:16px;min-height:100dvh}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 1px 3px #0000000a}.center{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:16px}h1{font-size:20px;margin:0 0 6px}h2{font-size:17px;margin:0 0 14px}.muted{color:var(--muted);font-size:14px}.meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13px;color:var(--muted);margin-top:10px}label{display:block;font-size:13px;font-weight:600;margin:14px 0 6px}input,select,textarea{width:100%;padding:11px 12px;font-size:15px;border:1.5px solid var(--border);border-radius:10px;outline:none;background:#fff;color:var(--text)}input:focus,select:focus,textarea:focus{border-color:var(--primary)}textarea{resize:vertical;min-height:84px}.btn{width:100%;padding:13px;font-size:16px;font-weight:700;color:#fff;background:var(--primary);border:none;border-radius:12px;cursor:pointer;margin-top:18px;transition:background .15s}.btn:hover{background:var(--primary-d)}.btn:disabled{opacity:.5;cursor:default}.btn-sec{background:#e2e8f0;color:var(--text)}.row{display:flex;gap:10px;align-items:center}.row .btn{margin-top:0}.progress{height:6px;background:#e2e8f0;border-radius:999px;overflow:hidden;margin:10px 0 16px}.progress>div{height:100%;background:var(--primary);transition:width .25s}.opt{display:flex;align-items:center;gap:12px;padding:13px;border:1.5px solid var(--border);border-radius:12px;margin-bottom:8px;cursor:pointer;background:#fff}.opt.sel{border-color:var(--primary);background:#eef2ff}.opt .box{width:22px;height:22px;border:2px solid #cbd5e1;border-radius:6px;flex:none;display:flex;align-items:center;justify-content:center}.opt.single .box{border-radius:50%}.opt.sel .box{border-color:var(--primary);background:var(--primary);color:#fff}.q-media{width:100%;border-radius:12px;margin:10px 0;max-height:280px;object-fit:cover}.timer{font-variant-numeric:tabular-nums;font-weight:700;padding:5px 12px;border-radius:10px;background:#f1f5f9}.timer.low{background:#fee2e2;color:var(--red)}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.result-score{font-size:52px;font-weight:800;line-height:1}.tag{display:inline-block;padding:6px 14px;border-radius:999px;font-weight:700;font-size:15px}.tag.green{background:#dcfce7;color:#15803d}.tag.red{background:#fee2e2;color:#b91c1c}.tag.amber{background:#fef3c7;color:#b45309}.err{color:var(--red);font-size:14px;margin-top:10px}.spin{width:28px;height:28px;border:3px solid #e2e8f0;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto}@keyframes spin{to{transform:rotate(360deg)}}.hint{font-size:12px;color:var(--muted);margin-top:6px}.brand{text-align:center;color:var(--muted);font-size:12px;margin-top:20px}