:root {
  /* Colors — light mode */
  --color-bg: #ffffff;
  --color-bg-subtle: #f5f4f1;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --color-link: #2a5db0;
  --color-link-hover: #1e4a8f;
  --color-brass: #b5882c;
  --color-brass-light: #d4a843;
  --color-border: #e0ddd8;
  --color-border-light: #eeebe6;
  --color-dropdown-bg: #ffffff;
  --color-dropdown-shadow: rgba(0, 0, 0, 0.1);
  --color-overlay: rgba(0, 0, 0, 0.04);

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 15px;
  --font-size-sm: 13px;
  --font-size-xs: 11px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 36px;
  --font-size-3xl: 48px;
  --line-height: 1.6;
  --line-height-tight: 1.3;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 600;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Layout */
  --content-max-width: 1200px;
  --nav-height: 52px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111111;
    --color-bg-subtle: #1a1a1a;
    --color-text: #e0e0e0;
    --color-text-muted: #888888;
    --color-link: #6fa8dc;
    --color-link-hover: #8fbfee;
    --color-brass: #d4a843;
    --color-brass-light: #e6c060;
    --color-border: #2a2a2a;
    --color-border-light: #222222;
    --color-dropdown-bg: #1a1a1a;
    --color-dropdown-shadow: rgba(0, 0, 0, 0.5);
    --color-overlay: rgba(255, 255, 255, 0.03);
  }
}