* { box-sizing: border-box; margin: 0; padding: 0; }
:root { font-family: 'Inter', system-ui, sans-serif; line-height: 1.5; }

body {
  background-color: #f9fafb;
  color: #1f2937;
}

@media (prefers-color-scheme: dark) {
  body { background-color: #111827; color: #f3f4f6; }
}