/* ============================================
   SEO Huntsville - CSS Custom Properties
   ============================================ */

:root {
  /* Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-primary-foreground: #ffffff;

  --color-secondary: #7c3aed;
  --color-secondary-dark: #6d28d9;
  --color-secondary-light: #8b5cf6;

  --color-accent: #06b6d4;
  --color-accent-dark: #0891b2;
  --color-accent-light: #22d3ee;

  --color-background: #ffffff;
  --color-foreground: #0f172a;

  --color-muted: #f1f5f9;
  --color-muted-dark: #e2e8f0;
  --color-muted-foreground: #64748b;

  --color-destructive: #ef4444;
  --color-destructive-light: #fca5a5;

  --color-success: #22c55e;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  --gradient-hero-overlay: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.90));
  --gradient-subtle: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.05), rgba(6, 182, 212, 0.05));
  --gradient-bold: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  --gradient-cta: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --font-size-7xl: 4.5rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;

  /* Layout */
  --container-max-width: 80rem;
  --container-padding: var(--spacing-4);
  --header-height: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.3);
  --shadow-glow-secondary: 0 0 30px rgba(124, 58, 237, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* Z-Index */
  --z-header: 100;
  --z-modal: 200;
  --z-tooltip: 300;
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0f172a;
    --color-foreground: #f8fafc;
    --color-muted: #1e293b;
    --color-muted-dark: #334155;
    --color-muted-foreground: #94a3b8;
  }
}