:root{--bg: #f4f6fb;--panel: #ffffff;--accent: #2d6cdf;--accent-hover: #1f57bd;--border: #d8deea;--text: #1c2536;--muted: #6b7689}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text)}header{padding:20px 28px 8px}header h1{margin:0;font-size:22px}.subtitle{margin:4px 0 0;color:var(--muted);font-size:14px}code{background:#eef1f7;padding:1px 5px;border-radius:4px;font-size:.92em}main{display:flex;gap:24px;padding:16px 28px 28px;flex-wrap:wrap;align-items:flex-start}.controls{display:flex;flex-direction:column;gap:10px;width:240px;flex:none}.controls button{padding:11px 14px;font-size:14px;font-weight:600;color:#fff;background:var(--accent);border:none;border-radius:8px;cursor:pointer;transition:background .15s,transform .05s;text-align:left}.controls button:hover:not(:disabled){background:var(--accent-hover)}.controls button:active:not(:disabled){transform:translateY(1px)}.controls button:disabled{opacity:.5;cursor:not-allowed}.controls button.secondary{background:#eef1f7;color:var(--text)}.controls button.secondary:hover:not(:disabled){background:#e2e7f1}.status{font-size:13px;color:var(--muted);padding:8px 10px;background:#eef1f7;border-radius:8px}.event-log{font-size:12px;font-family:Consolas,monospace;color:var(--text);background:#1c2536;color:#c8d4ec;border-radius:8px;padding:10px;height:180px;overflow-y:auto;white-space:pre-wrap;line-height:1.5}.canvases{display:flex;gap:20px;flex-wrap:wrap}figure{margin:0}figcaption{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px}.canvas-box{width:480px;height:360px;background:var(--panel);border:1px solid var(--border);border-radius:10px;display:block}.canvas-box canvas{border-radius:10px}