:root{--header-height: 56px;--footer-height: 52px;--footer-bg: #dedede;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;color-scheme:light;--bg: #f5f5f5;--surface: #fff;--panel: #fafafa;--canvas: #ededed;--text: #262626;--muted: #6c6c6c;--line: #e5e5e5;--hover: #ededed;--accent: #2563eb;--accent-contrast: #fff;--accent-soft: #e5e5e5;--brush-fill: #e5e5e5;--shadow: 0 16px 50px #24242408;--checker: #d4d4d4}:root[data-theme=dark]{--footer-bg: #111318;color-scheme:dark;--bg: #151619;--surface: #1e1f23;--panel: #202125;--canvas: #191a1e;--text: #eeeef0;--muted: #a1a2ac;--line: #303137;--hover: #2c2d33;--accent: #f87171;--accent-contrast: #151619;--accent-soft: #263449;--brush-fill: color-mix(in srgb, var(--accent) 15%, transparent);--shadow: 0 16px 50px #0002;--checker: #323339}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,select{cursor:pointer}button{transition:background .16s,color .16s,transform 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canvas{display:block;touch-action:none;position:absolute;inset:0}.canvas-hint{position:absolute;bottom:18px;left:50%;transform:translate(-50%);background:var(--surface);border:1px solid var(--line);padding:7px 12px;border-radius:6px;color:var(--muted);font-size:10px;white-space:nowrap;pointer-events:none;box-shadow:0 2px 10px #0001}.canvas-bottom{height:43px;min-height:43px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:var(--surface);border-top:1px solid var(--line);font-size:10px;color:var(--muted)}.canvas-bottom>span{display:flex;gap:8px;align-items:center}.zoom-controls{display:flex;align-items:center;gap:5px}.zoom-controls>span{min-width:39px;text-align:center;font-size:10px;font-variant-numeric:tabular-nums}.zoom-controls .zoom-divider{width:1px;min-width:1px;height:14px;background:var(--line);margin:0 5px}.panel{overflow-y:auto;grid-column:2;grid-row:1/3;border-left:1px solid 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