:root{--background:#fff;--foreground:#18181b;--surface:#f8f9fa;--border:#e4e4e7;--font-chakra:"Chakra Petch",sans-serif;--font-fira:"Fira Code",monospace;--font-inter:"Inter",sans-serif}.dark{--background:#0f0f10;--foreground:#f8fafc;--surface:#18181b;--border:#27272a}body{background-color:var(--background);color:var(--foreground);transition:background-color .3s,color .3s}