:root{--ink: #101826;--ink-soft: #4b5a70;--surface: #f5f7fa;--panel: #ffffff;--line: #dde4ee;--accent: #1565d8;--accent-dark: #0f4ea8;--ok: #1a7f4e;--err: #c0392b;--warn: #b45309;--mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;--sans: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--sans);background:var(--surface);color:var(--ink);font-size:15px}button{font:inherit;cursor:pointer;border:none;border-radius:6px;padding:9px 16px;background:var(--accent);color:#fff;font-weight:600;transition:background .15s}button:hover{background:var(--accent-dark)}button:disabled{opacity:.5;cursor:not-allowed}button.ghost{background:transparent;color:var(--ink-soft);border:1px solid var(--line)}button.ghost:hover{background:#eef2f8}button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input,textarea{font:inherit;padding:9px 12px;border:1px solid var(--line);border-radius:6px;width:100%}input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:transparent}.topbar{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--ink);color:#e8edf5}.topbar .brand{font-weight:700;letter-spacing:.04em}.topbar .brand span{color:#6ea8ff;font-family:var(--mono)}.topbar .meta{display:flex;align-items:center;gap:16px;font-size:13px}.timer{font-family:var(--mono);font-size:18px;font-weight:700;padding:4px 12px;border-radius:6px;background:#1f2c42;color:#9fd0ff}.timer.low{background:#4a1410;color:#ffb1a8;animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.6}}@media(prefers-reduced-motion:reduce){.timer.low{animation:none}}.login-wrap{height:100%;display:grid;place-items:center;background:radial-gradient(1200px 500px at 70% -10%,#16335f 0%,transparent 60%),var(--ink)}.login-card{width:380px;background:var(--panel);border-radius:12px;padding:36px;box-shadow:0 24px 60px #040c1c73}.login-card h1{margin:0 0 4px;font-size:22px}.login-card p.sub{margin:0 0 24px;color:var(--ink-soft);font-size:14px}.login-card label{display:block;font-size:13px;font-weight:600;margin:14px 0 6px}.login-card button{width:100%;margin-top:22px;padding:11px}.page{max-width:880px;margin:0 auto;padding:32px 24px}.page h2{font-size:20px}.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:20px;margin-bottom:14px}.card .row{display:flex;justify-content:space-between;align-items:center;gap:16px}.badge{font-size:12px;font-weight:700;padding:3px 10px;border-radius:99px;text-transform:uppercase;letter-spacing:.05em}.badge.pending{background:#e8eefb;color:var(--accent-dark)}.badge.in_progress{background:#fff4e0;color:var(--warn)}.badge.submitted{background:#e3f5ec;color:var(--ok)}.badge.expired{background:#fdeae7;color:var(--err)}.test-layout{display:grid;grid-template-columns:240px 1fr;height:calc(100% - 56px)}.sidebar{border-right:1px solid var(--line);background:var(--panel);padding:16px 12px;overflow-y:auto}.sidebar .qbtn{display:block;width:100%;text-align:left;background:transparent;color:var(--ink);border:1px solid transparent;padding:10px 12px;border-radius:8px;margin-bottom:4px;font-weight:500}.sidebar .qbtn:hover{background:#eef2f8}.sidebar .qbtn.active{border-color:var(--accent);background:#e8f0fd;color:var(--accent-dark);font-weight:700}.sidebar .qbtn .pts{float:right;font-size:12px;color:var(--ink-soft)}.sidebar .qbtn .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--line);margin-right:8px}.sidebar .qbtn .dot.answered{background:var(--ok)}.sidebar .submit-zone{margin-top:20px;padding:0 4px}.sidebar .submit-zone button{width:100%;background:var(--ok)}.sidebar .submit-zone button:hover{background:#136a40}.workspace{display:flex;flex-direction:column;overflow:hidden}.question-head{padding:18px 24px 12px}.question-head h3{margin:0 0 6px;font-size:17px}.question-head p{margin:0;color:var(--ink-soft);line-height:1.5;white-space:pre-wrap}.editor-zone{padding:0 24px}.editor-frame{border:1px solid var(--line);border-radius:8px;overflow:hidden}.editor-actions{display:flex;gap:10px;align-items:center;padding:10px 0}.editor-actions .hint{font-size:12.5px;color:var(--ink-soft);margin-left:auto}.save-state{font-size:13px;font-weight:600}.save-state.saved{color:var(--ok)}.save-state.dirty{color:var(--warn)}.results-zone{flex:1;overflow:auto;padding:4px 24px 24px}.result-meta{font-size:13px;color:var(--ink-soft);padding:8px 0;font-family:var(--mono)}.result-error{background:#fdeae7;border:1px solid #f3c1ba;color:var(--err);border-radius:8px;padding:12px 16px;font-family:var(--mono);font-size:13px;white-space:pre-wrap}table.result{border-collapse:collapse;font-family:var(--mono);font-size:12.5px;background:var(--panel)}table.result th,table.result td{border:1px solid var(--line);padding:6px 10px;text-align:left;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}table.result th{background:#eef2f8;position:sticky;top:0}table.result tr:nth-child(2n) td{background:#fafbfd}.notice{background:#fff8e8;border:1px solid #f1dfae;color:#7a5b12;border-radius:8px;padding:10px 14px;font-size:13.5px;margin:12px 24px 0}.error-text{color:var(--err);font-size:13.5px;margin-top:10px}@media(max-width:760px){.test-layout{grid-template-columns:1fr}.sidebar{border-right:none;border-bottom:1px solid var(--line)}}