:root{--bg: #ffffff;--bg-alt: #f7f7f5;--fg: #0f172a;--fg-muted: #64748b;--border: #e5e7eb;--accent: #0ea5e9;--accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);--shadow-md: 0 4px 12px rgba(15, 23, 42, .06);--radius: 12px;--container: 1120px;--article: 720px}@media(prefers-color-scheme:dark){:root{--bg: #0b0f17;--bg-alt: #111826;--fg: #e2e8f0;--fg-muted: #94a3b8;--border: #1f2937;--accent-soft: color-mix(in srgb, var(--accent) 20%, transparent);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 4px 12px rgba(0, 0, 0, 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