:root{--brand: #5865f2;--brand-soft: #eef0fe;--brand-strong: #4752c4;--bg: #ffffff;--bg-subtle: #f7f8fa;--bg-sidebar: #fbfbfd;--surface: #ffffff;--border: #e7e8ec;--border-strong: #d7d9df;--text: #1c1d22;--text-muted: #5c5f6b;--text-faint: #8a8d98;--code-bg: #f4f5f8;--code-text: #2b2d31;--shadow-sm: 0 1px 2px rgba(20, 21, 26, .04);--shadow-md: 0 8px 30px rgba(20, 21, 26, .08);--radius: 12px;--sidebar-w: 280px;--topbar-h: 60px;--content-max: 820px;--font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace}:root.dark{--brand: #818cf8;--brand-soft: #1e2030;--brand-strong: #a5b4fc;--bg: #0b0c0f;--bg-subtle: #0f1014;--bg-sidebar: #0d0e12;--surface: #121319;--border: #23252d;--border-strong: #2f323c;--text: #e9eaef;--text-muted: #a6a9b5;--text-faint: #71747f;--code-bg: #16171d;--code-text: #d7dae3;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 8px 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