/* Design Tokens — CSS Custom Properties */

:root {
  /* === Colors (60-30-10 Rule) === */
  /* 60% Primary — Cool Blue (trust, professionalism, cooling) */
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-primary-light: #4a90e2;
  --color-primary-bg: #e8f0fe;

  /* 30% Secondary — White / Off-white (clean, modern) */
  --color-white: #ffffff;
  --color-off-white: #f8f9fa;
  --color-light-gray: #f0f2f5;
  --color-gray: #e1e5ea;

  /* 10% Accent — Orange (energy, urgency, CTAs) */
  --color-accent: #ff6b35;
  --color-accent-dark: #e55a2b;
  --color-accent-light: #ff8c61;

  /* Text Colors */
  --color-text: #1f2328;
  --color-text-secondary: #4a5568;
  --color-text-muted: #6b7280;
  --color-text-light: #ffffff;

  /* Semantic Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-focus: #1a73e8;

  /* Borders */
  --color-border: #d1d5db;
  --color-border-light: #e5e7eb;

  /* === Typography === */
  --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;

  /* Font Sizes — Fluid (clamp) */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.25rem;    /* 20px */
  --font-size-xl: 1.5rem;     /* 24px */
  --font-size-2xl: clamp(1.75rem, 2vw + 1rem, 2rem);     /* 28-32px */
  --font-size-3xl: clamp(2rem, 3vw + 0.5rem, 2.5rem);    /* 32-40px */
  --font-size-4xl: clamp(2.25rem, 4vw + 0.5rem, 3rem);   /* 36-48px */
  --font-size-hero: clamp(2.5rem, 5vw + 0.5rem, 3.75rem); /* 40-60px */

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* === Spacing Scale === */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */

  /* === Layout === */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --container-padding: var(--space-6);

  /* === Border Radius === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* === Shadows === */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

  /* === Transitions === */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* === Z-Index Scale === */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* === Header === */
  --header-height: 72px;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
    --transition-slow: 0ms;
  }
  html {
    scroll-behavior: auto;
  }
}