:root{--bg: #11101a;--panel: #1b1930;--ink: #e8e6f5;--muted: #9b97c0;--accent: #8a6fd0;--good: #57d9a3;--bad: #e8736b;--line: #2c2a44}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-text-size-adjust:100%}#app{max-width:760px;margin:0 auto;padding:16px 14px 40px}header h1{font-size:22px;margin:0;letter-spacing:.5px;background:linear-gradient(90deg,var(--accent),#c9b6ff);-webkit-background-clip:text;background-clip:text;color:transparent}header p{margin:4px 0 12px;color:var(--muted);font-size:13px}.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:10px}.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}.seg button{background:var(--panel);color:var(--muted);border:0;padding:7px 12px;font-size:13px;cursor:pointer}.seg button[aria-pressed=true]{background:var(--accent);color:#14101f;font-weight:600}.btn{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:7px 14px;font-size:13px;cursor:pointer}.btn:hover{border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:default}#cv{width:100%;display:block;background:#0c0b15;border:1px solid var(--line);border-radius:12px;touch-action:none}.hud{display:flex;justify-content:space-between;gap:8px;margin:10px 0 6px;flex-wrap:wrap}.hud .chip{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:13px}.hud .chip b{color:var(--accent)}.fn{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:15px;color:#d8d2ff}#sliders{margin:8px 0}#sliders label{display:block;font-size:12px;color:var(--muted);margin:6px 0 2px}#sliders input[type=range]{width:100%;accent-color:var(--accent)}#choices{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}#choices button{flex:1 1 90px;min-width:90px;background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:10px;font-size:15px;cursor:pointer;font-family:ui-monospace,Menlo,Consolas,monospace}#choices button:hover{border-color:var(--accent)}#choices button.correct{background:var(--good);color:#06281c;border-color:var(--good)}#choices button.wrong{background:var(--bad);color:#2a0d0a;border-color:var(--bad)}#status{font-size:14px;min-height:20px;margin:8px 0;color:var(--muted)}#status.good{color:var(--good)}#status.bad{color:var(--bad)}.banner{margin-top:12px;padding:14px;border:1px solid var(--accent);border-radius:10px;background:#8a6fd01f;font-size:15px}.hidden{display:none}