/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
  /* Colors — Background */
  --color-bg-primary: #ffffff;
  --color-bg-elevated: #f8f9fc;
  --color-bg-subtle: #eef0f6;

  /* Colors — Border */
  --color-border: #e2e4ea;

  /* Colors — Text */
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #64748b;

  /* Colors — Accent */
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-secondary: #14b8a6;

  /* Colors — Gradient (warm) */
  --color-gradient-start: #f97316;
  --color-gradient-end: #ec4899;

  /* Colors — Status */
  --color-success: #10b981;

  /* Typography — Families */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-code: 'JetBrains Mono', ui-monospace, 'Cascadia Code', 'Fira Code', monospace;

  /* Typography — Sizes (fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.775rem + 0.25vw, 0.875rem);
  --text-base: 1rem;
  --text-lg: clamp(1.0625rem, 1rem + 0.3125vw, 1.125rem);
  --text-xl: clamp(1.1875rem, 1.1rem + 0.5vw, 1.3125rem);
  --text-2xl: clamp(1.375rem, 1.2rem + 0.875vw, 1.625rem);
  --text-3xl: clamp(1.75rem, 1.5rem + 1.25vw, 2.5rem);
  --text-4xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);

  /* Typography — Line heights */
  --leading-tight: 1.2;
  --leading-normal: 1.7;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-padding: clamp(1rem, 3vw, 2rem);

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Z-index */
  --z-nav: 100;
  --z-overlay: 200;
  --z-modal: 300;
}