:root{--bg: #0a0e16;--bg-elev: #121826;--bg-card: #161d2e;--border: #232c40;--border-focus: #3b82f6;--text: #e6edf3;--text-dim: #9aa7bd;--text-faint: #5f6e87;--accent: #60a5fa;--accent-strong: #3b82f6;--success: #34d399;--danger: #f87171;--warn: #fbbf24;--radius: 14px;--mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:radial-gradient(900px 500px at 85% -10%,rgba(59,130,246,.1),transparent 60%),radial-gradient(700px 500px at 0% 110%,rgba(52,211,153,.06),transparent 55%),var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;line-height:1.6}.app{max-width:860px;margin:0 auto;padding:28px 20px 80px}.topbar{position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0a0e16c7;border-bottom:1px solid var(--border);padding:14px 20px;margin:-28px -20px 28px}.topbar-inner{max-width:860px;margin:0 auto;display:flex;align-items:center;gap:16px}.brand{font-weight:700;font-size:14px;letter-spacing:.2px;white-space:nowrap}.brand small{color:var(--text-faint);font-weight:500;display:block;font-size:11px}.progress-wrap{flex:1}.progress-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-dim);margin-bottom:6px}.progress-track{height:6px;background:var(--border);border-radius:999px;overflow:hidden}.progress-bar{height:100%;background:linear-gradient(90deg,var(--accent-strong),var(--success));border-radius:999px;transition:width .35s ease}.save-tag{font-style:normal;font-size:11px}.save-tag.saving{color:var(--text-faint)}.save-tag.saved{color:var(--success)}.save-tag.error{color:var(--danger)}.timer{font-family:var(--mono);font-size:20px;font-weight:600;padding:6px 12px;border-radius:10px;background:var(--bg-elev);border:1px solid var(--border);min-width:86px;text-align:center;font-variant-numeric:tabular-nums}.timer.warn{color:var(--warn);border-color:#fbbf2466}.timer.danger{color:var(--danger);border-color:#f8717180;animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.55}}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px}.link-back{background:none;border:none;color:var(--text-dim);font-size:13px;cursor:pointer;padding:0;margin-bottom:14px;font-family:var(--sans)}.link-back:hover:not(:disabled){color:var(--text)}.link-back:disabled{opacity:.4;cursor:not-allowed}.test-list{display:flex;flex-direction:column;gap:12px;margin-top:8px}.test-item{display:flex;align-items:center;gap:16px;text-align:left;width:100%;background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:18px 20px;cursor:pointer;color:var(--text);font-family:var(--sans);transition:border-color .15s,transform .1s}.test-item:hover{border-color:var(--accent-strong);transform:translateY(-1px)}.test-item-main{flex:1;display:flex;flex-direction:column;gap:4px}.test-item-name{font-size:17px;font-weight:700}.test-item-desc{font-size:13px;color:var(--text-dim)}.test-item-meta{display:flex;flex-direction:column;gap:3px;text-align:right;font-size:12px;color:var(--text-faint);white-space:nowrap;font-family:var(--mono)}.logo-row{margin-bottom:22px}.logo-row img{max-width:100%}.brand img{display:block}.block-tag{display:inline-block;font-size:11px;font-weight:600;letter-spacing:.6px;text-transform:uppercase;color:var(--accent);background:#60a5fa1f;border:1px solid rgba(96,165,250,.25);padding:4px 10px;border-radius:999px}.q-id{color:var(--text-faint);font-family:var(--mono);font-size:13px;margin-left:8px}.q-title{font-size:22px;font-weight:700;margin:16px 0 12px}.q-scenario{color:var(--text-dim);white-space:pre-wrap;margin:0 0 18px}.q-prompt{font-weight:600;font-size:16px;color:var(--text);border-left:3px solid var(--accent-strong);padding-left:14px;margin:20px 0 14px}.code-wrap{border-radius:10px;overflow:hidden;border:1px solid var(--border);margin:4px 0 8px}.code-head{display:flex;align-items:center;gap:8px;background:#0d1320;border-bottom:1px solid var(--border);padding:8px 14px;font-family:var(--mono);font-size:12px;color:var(--text-faint)}.dot{width:11px;height:11px;border-radius:50%}.dot.r{background:#ff5f56}.dot.y{background:#ffbd2e}.dot.g{background:#27c93f}.code-lang{margin-left:auto;text-transform:uppercase;letter-spacing:.5px}textarea.answer{width:100%;min-height:160px;resize:vertical;background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;color:var(--text);font-family:var(--mono);font-size:14px;line-height:1.6;padding:14px;transition:border-color .15s}textarea.answer:focus{outline:none;border-color:var(--border-focus)}textarea.answer:disabled{opacity:.6;cursor:not-allowed}textarea.answer::placeholder{color:var(--text-faint)}.choices{border:0;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.choices:disabled{opacity:.6}.choice{display:flex;align-items:flex-start;gap:12px;background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;padding:14px 16px;cursor:pointer;transition:border-color .15s,background .15s}.choice:hover{border-color:var(--text-faint)}.choice.selected{border-color:var(--accent-strong);background:#60a5fa14}.choice input[type=radio]{margin-top:3px;accent-color:var(--accent-strong)}.choices:disabled .choice{cursor:not-allowed}.choice-letter{font-family:var(--mono);font-weight:700;color:var(--accent);min-width:18px}.choice-text{color:var(--text);line-height:1.5}input.text{width:100%;background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:16px;padding:13px 14px;transition:border-color .15s}input.text:focus{outline:none;border-color:var(--border-focus)}label.field{display:block;margin-bottom:18px}label.field span{display:block;font-size:13px;color:var(--text-dim);margin-bottom:7px}.nav{display:flex;justify-content:space-between;gap:12px;margin-top:26px}button.btn{font-family:var(--sans);font-size:15px;font-weight:600;padding:12px 22px;border-radius:10px;border:1px solid var(--border);background:var(--bg-elev);color:var(--text);cursor:pointer;transition:all .15s}button.btn:hover:not(:disabled){border-color:var(--text-faint)}button.btn:disabled{opacity:.4;cursor:not-allowed}button.btn.primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}button.btn.primary:hover:not(:disabled){background:#2f74e0}button.btn.full{width:100%}.muted{color:var(--text-dim);font-size:14px}.center{text-align:center}.spacer{height:8px}.banner{background:#f871711a;border:1px solid rgba(248,113,113,.3);color:var(--danger);border-radius:10px;padding:12px 16px;font-size:14px;margin-bottom:18px}.banner.warn{background:#fbbf241a;border-color:#fbbf244d;color:var(--warn)}.banner.ok{background:#34d3991a;border-color:#34d3994d;color:var(--success)}.title-xl{font-size:30px;font-weight:800;margin:0 0 8px}.lead{color:var(--text-dim);margin:0 0 26px}.finish-icon{font-size:56px;margin-bottom:10px}.spinner{width:18px;height:18px;border-radius:50%;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;display:inline-block;vertical-align:-3px;margin-right:8px;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.admin-list-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.admin-error{background:#f871711a;border:1px solid rgba(248,113,113,.3);color:var(--danger);border-radius:10px;padding:12px 16px;font-size:14px;margin:4px 0 18px}.admin-item{align-items:center;cursor:default}.admin-item:hover{border-color:var(--border);transform:none}.admin-item-actions{display:flex;gap:8px;flex-shrink:0}.btn-primary,.btn-ghost,.btn-danger{font-family:var(--sans);font-size:14px;font-weight:600;padding:9px 16px;border-radius:9px;border:1px solid var(--border);background:var(--bg-elev);color:var(--text);cursor:pointer;transition:all .15s}.btn-primary:hover:not(:disabled),.btn-ghost:hover:not(:disabled),.btn-danger:hover:not(:disabled){border-color:var(--text-faint)}.btn-primary:disabled,.btn-ghost:disabled,.btn-danger:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}.btn-primary:hover:not(:disabled){background:#2f74e0}.btn-danger{color:var(--danger)}.btn-danger:hover:not(:disabled){border-color:var(--danger)}.admin-editor{text-align:left}.admin-section{font-size:14px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);margin:28px 0 12px;border-bottom:1px solid var(--border);padding-bottom:8px}.admin-count{color:var(--text-faint);font-weight:600}.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.admin-field{display:flex;flex-direction:column;gap:6px}.admin-field-wide{grid-column:1 / -1}.admin-field span{font-size:13px;color:var(--text-dim)}.admin-input{width:100%;background:var(--bg-elev);border:1px solid var(--border);border-radius:9px;color:var(--text);font-size:14px;font-family:var(--sans);padding:10px 12px;transition:border-color .15s}.admin-input:focus{outline:none;border-color:var(--border-focus)}.admin-textarea{resize:vertical;line-height:1.5}.admin-code{font-family:var(--mono);font-size:13px;white-space:pre}.admin-question{border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:14px;background:var(--bg-elev)}.admin-question-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.admin-add{margin-top:6px}.admin-option-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}.admin-option-row input[type=radio]{accent-color:var(--accent-strong)}.admin-option-row .admin-input{flex:1}.admin-option-row .btn-danger{padding:6px 10px;line-height:1}@media (max-width: 620px){.admin-grid{grid-template-columns:1fr}.admin-list-head{flex-direction:column}}