/* Design System Variables for RetroLunch.com */

:root {
  /* Color Palette - Modern Gradient Theme */
  --color-primary: #6366f1;        /* Indigo */
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;

  --color-secondary: #8b5cf6;      /* Purple */
  --color-secondary-dark: #7c3aed;
  --color-secondary-light: #a78bfa;

  --color-accent: #ec4899;         /* Pink */
  --color-accent-dark: #db2777;
  --color-accent-light: #f472b6;

  /* Neutral Colors */
  --color-background: #ffffff;
  --color-surface: #f8fafc;
  --color-surface-dark: #f1f5f9;

  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-lighter: #94a3b8;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  --gradient-accent: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-card: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(0,0,0,0.05) 100%);

  /* Spacing Scale */
  --space-xs: 0.5rem;      /* 8px */
  --space-sm: 1rem;        /* 16px */
  --space-md: 1.5rem;      /* 24px */
  --space-lg: 2rem;        /* 32px */
  --space-xl: 3rem;        /* 48px */
  --space-2xl: 4rem;       /* 64px */
  --space-3xl: 6rem;       /* 96px */

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;

  /* Font Sizes */
  --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 */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* Font Weights */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

  /* Border Radius */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-base: 0.5rem;   /* 8px */
  --radius-md: 0.75rem;    /* 12px */
  --radius-lg: 1rem;       /* 16px */
  --radius-xl: 1.5rem;     /* 24px */
  --radius-2xl: 2rem;      /* 32px */
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout Constraints */
  --container-max: 1280px;
  --content-max: 800px;
  --content-wide: 1024px;

  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal-backdrop: 40;
  --z-modal: 50;
  --z-popover: 60;
  --z-tooltip: 70;
}

/* Dark mode variables (optional future enhancement) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0f172a;
    --color-surface: #1e293b;
    --color-surface-dark: #334155;

    --color-text: #f1f5f9;
    --color-text-light: #cbd5e1;
    --color-text-lighter: #94a3b8;

    --color-border: #334155;
    --color-border-light: #1e293b;
  }
}