:root {
  /* Backgrounds */
  --bg-base: #1a1a1a;
  --bg-raised: #242424;
  --bg-inset: #141414;
  --bg-pressed: #0f0f0f;
  --bg-hover: #2a2a2a;

  /* Accent (olive/khaki) */
  --accent: #8b9a46;
  --accent-hover: #9cad52;
  --accent-pressed: #7a8a3d;
  --accent-subtle: rgba(139, 154, 70, 0.15);

  /* Text */
  --text-primary: #e8e8e8;
  --text-secondary: #888888;
  --text-muted: #555555;

  /* Semantic */
  --error: #c75a5a;
  --error-bg: rgba(199, 90, 90, 0.15);
  --success: #8b9a46;

  /* MTG Colors */
  --mtg-white: #f9faf4;
  --mtg-blue: #0e68ab;
  --mtg-black: #150b00;
  --mtg-red: #d3202a;
  --mtg-green: #00733e;
  --mtg-colorless: #888888;

  /* Borders */
  --border-subtle: #2a2a2a;
  --border-default: #333333;
  --border-strong: #444444;

  /* Elevation Shadows */
  --shadow-low: 3px 0 4px 0 rgba(0,0,0,0.2);
  --shadow-mid: 4px 0 8px 0 rgba(0,0,0,0.25);
  --shadow-high: 8px 0 16px 0 rgba(0,0,0,0.3);

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-md: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 600;

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