/* ============================================
   EDL OS — Design System Tokens
   Brand: Electric Tangerine (#FF6B1A)
   Typography: Inter + JetBrains Mono
   Grid: 8pt, 3 breakpoints (360/768/1280)
   ============================================ */

:root {
  /* ── Brand Colors ── */
  --color-tangerine: #FF6B1A;
  --color-tangerine-hover: #E55A0A;
  --color-tangerine-light: #FFE5D9;

  /* ── Neutrals ── */
  --color-black: #0A0A0A;
  --color-dark: #1A1A1A;
  --color-gray-900: #171717;
  --color-gray-700: #404040;
  --color-gray-500: #737373;
  --color-gray-400: #A3A3A3;
  --color-gray-300: #D4D4D4;
  --color-gray-200: #E5E5E5;
  --color-gray-100: #F5F5F5;
  --color-white: #FFFFFF;
  --color-off-white: #FAFAFA;

  /* ── Semantic Colors ── */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* ── Typography ── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Fluid font sizes via clamp() */
  --font-size-h1: clamp(2.5rem, 5vw + 1rem, 5rem);
  --font-size-h2: clamp(2rem, 3.5vw + 0.5rem, 3.5rem);
  --font-size-h3: clamp(1.5rem, 2vw + 0.5rem, 2rem);
  --font-size-h4: clamp(1.25rem, 1vw + 0.5rem, 1.5rem);
  --font-size-body: clamp(1rem, 0.5vw + 0.875rem, 1.125rem);
  --font-size-small: clamp(0.875rem, 0.25vw + 0.75rem, 0.95rem);
  --font-size-caption: 0.8125rem;

  /* ── Spacing (8pt grid) ── */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --space-32: 128px;

  /* ── Layout ── */
  --max-width: 1280px;
  --content-width: 1216px;
  --grid-gap-desktop: 32px;
  --grid-gap-tablet: 24px;
  --grid-gap-mobile: 16px;

  /* ── Border radius ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-tg: 18px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-card-hover: 0 8px 30px rgba(255, 107, 26, 0.15);

  /* ── Motion ── */
  --ease-default: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-micro: 150ms;
  --duration-fast: 200ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
  --duration-hero: 800ms;

  /* ── Z-index ── */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-micro: 0ms;
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --duration-hero: 0ms;
  }
}