:root{--bg: #05060f;--panel: #0d1226;--ink: #e8ecff;--muted: #98a3cc;--accent: #4a5fc0;--accent-bright: #7d92ee;--good: #4ec98a;--bad: #e06a7a}*{box-sizing:border-box}html,body{margin:0;background:radial-gradient(1200px 700px at 50% -10%,#121a3a 0%,var(--bg) 60%);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;min-height:100%}#app{max-width:780px;margin:0 auto;padding:20px 16px 48px}header h1{margin:0 0 4px;font-size:30px;letter-spacing:6px;font-weight:800;color:var(--accent-bright);text-shadow:0 0 18px rgba(125,146,238,.45)}.sub{margin:0 0 16px;color:var(--muted);font-size:14px}.bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:12px}.seg{display:inline-flex;border:1px solid #243056;border-radius:10px;overflow:hidden}.seg button{background:transparent;color:var(--muted);border:0;padding:8px 14px;font-size:13px;cursor:pointer}.seg button.active{background:var(--accent);color:#fff}.btn{background:#1a2244;color:var(--ink);border:1px solid #2a3560;border-radius:10px;padding:8px 14px;font-size:13px;cursor:pointer}.btn:hover{background:#222c56}.dials{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:12px}.dials label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted);min-width:240px;flex:1}.dials label span{color:var(--accent-bright);font-weight:700}.dials input[type=range]{width:100%;accent-color:var(--accent)}.status{font-size:13px;color:var(--muted);margin-bottom:8px;min-height:18px}.stage{border:1px solid #232c52;border-radius:14px;overflow:hidden;background:#04060f;box-shadow:0 8px 40px #00000080}.stage canvas{display:block;width:100%;height:auto;touch-action:none;cursor:grab}.stage canvas:active{cursor:grabbing}.prompt{margin-top:14px;min-height:70px}.prompt .q{font-size:16px;margin-bottom:10px}.prompt .q em{color:var(--accent-bright);font-style:normal;font-weight:700}.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px}.opt{background:#141b38;border:1px solid #2a3560;color:var(--ink);border-radius:10px;padding:12px;font-size:14px;cursor:pointer;transition:background .12s,border-color .12s}.opt:hover{background:#1d2750}.opt.correct{background:#4ec98a38;border-color:var(--good)}.opt.wrong{background:#e06a7a38;border-color:var(--bad)}.opt:disabled{cursor:default}.result strong{color:var(--accent-bright);font-size:18px}.result div{margin-top:12px}.hint{margin-top:14px;font-size:12px;color:#6b76a0}