:root{--canvas: #ffffff;--canvas-subtle: #f6f8fa;--canvas-inset: #f0f2f4;--fg: #1f2328;--fg-muted: #636c76;--fg-subtle: #8c959f;--border: #d0d7de;--border-muted: #d8dee4;--accent: #0969da;--accent-hover: #0550ae;--accent-subtle: #dbeafe;--success: #1a7f37;--tag-bg: #eaf5ff;--tag-fg: #0550ae;--shadow-sm: 0 1px 0 rgba(31, 35, 40, .04);--shadow: 0 1px 3px rgba(31, 35, 40, .12), 0 8px 24px rgba(66, 74, 83, .12);--radius: 6px;--max-w: 1012px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", Helvetica, Arial, sans-serif;--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--transition: 80ms ease}:root.dark{--canvas: #0d1117;--canvas-subtle: #161b22;--canvas-inset: #010409;--fg: #e6edf3;--fg-muted: #8d96a0;--fg-subtle: #6e7681;--border: #30363d;--border-muted: #21262d;--accent: #58a6ff;--accent-hover: #79b8ff;--accent-subtle: #1c2e4a;--tag-bg: #1c2e4a;--tag-fg: #79b8ff;--shadow-sm: 0 1px 0 rgba(0, 0, 0, .4);--shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 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