:root {
  /* Spacing Scale (4/8px base) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.5rem;   /* 24px */
  --space-6: 2rem;     /* 32px */
  --space-7: 3rem;     /* 48px */
  --space-8: 4rem;     /* 64px */

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */

  /* Color Palette - Content Forward, Editorial */
  --bg-primary: #0f1117;
  --bg-surface: #181b24;
  --bg-surface-elevated: #222634;
  --bg-input: #12151e;
  --bg-canvas: #0c0e14;
  
  --border-subtle: #2d3345;
  --border-strong: #404860;
  --border-focus: #4f80ff;

  --text-primary: #f1f3f9;
  --text-secondary: #9aa2b8;
  --text-muted: #656d82;

  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-text: #ffffff;
  
  --danger-primary: #ef4444;
  --danger-surface: rgba(239, 68, 68, 0.12);
  --success-primary: #10b981;
  --success-surface: rgba(16, 185, 129, 0.12);
  --warning-primary: #f59e0b;

  /* Shadows & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

  --transition-fast: 150ms ease-out;
  --transition-normal: 200ms ease-out;
}