:root{color-scheme:dark;--bg: #0e1116;--panel: #161b22;--border: #2d333b;--text: #e6edf3;--muted: #9aa4af;--accent: #4dabf7;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}#app{display:flex;min-height:100vh}.canvas-wrap{flex:1;display:flex;align-items:center;justify-content:center;padding:16px;min-width:0}.canvas-wrap canvas{width:100%;max-height:calc(100vh - 32px);aspect-ratio:2 / 1;border:1px solid var(--border);border-radius:6px;cursor:crosshair;touch-action:none}.sidebar{width:300px;flex-shrink:0;background:var(--panel);border-left:1px solid var(--border);padding:16px;display:flex;flex-direction:column;gap:14px;overflow-y:auto}.sidebar h1{font-size:18px;margin:0}.sidebar h1 span{color:var(--accent)}.sidebar .tagline{font-size:12px;color:var(--muted);margin:-8px 0 0}.stats{font-size:12px;font-variant-numeric:tabular-nums;color:var(--muted);line-height:1.7;border:1px solid var(--border);border-radius:6px;padding:8px 10px}.stats b{color:var(--text)}.control{display:flex;flex-direction:column;gap:4px;font-size:13px}.control label{display:flex;justify-content:space-between;color:var(--muted)}.control label output{color:var(--text);font-variant-numeric:tabular-nums}.control input[type=range]{width:100%;accent-color:var(--accent)}.buttons{display:grid;grid-template-columns:1fr 1fr;gap:8px}button,select{background:#21262d;color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 10px;font-size:13px;cursor:pointer}button:hover{border-color:var(--accent)}details{font-size:12px;color:var(--muted)}details pre{white-space:pre-wrap;word-break:break-all;font-size:11px}.hint{font-size:12px;color:var(--muted)}.fallback{margin:auto;max-width:520px;padding:32px;text-align:center;line-height:1.6}.fallback h1{color:var(--accent)}@media(max-width:800px){#app{flex-direction:column}.sidebar{width:100%;border-left:none;border-top:1px solid var(--border)}}