/* ==========================================================================
   variables.css - CSS Custom Properties for Zenel Website
   ========================================================================== */

:root {
  /* ------------------------------------------------------------------
     Brand Colors
     ------------------------------------------------------------------ */
  --color-primary: #002A5C;
  --color-primary-light: #003D7A;
  --color-primary-dark: #001A3A;
  --color-primary-rgb: 0, 42, 92;

  --color-accent: #FFC107;
  --color-accent-light: #FFD54F;
  --color-accent-dark: #FFA000;
  --color-accent-rgb: 255, 193, 7;

  --color-green: #4CAF50;
  --color-green-light: #66BB6A;
  --color-green-dark: #388E3C;
  --color-green-rgb: 76, 175, 80;

  /* ------------------------------------------------------------------
     Neutral Colors
     ------------------------------------------------------------------ */
  --color-white: #FFFFFF;
  --color-gray-50: #F8F9FA;
  --color-gray-100: #F1F3F5;
  --color-gray-200: #E9ECEF;
  --color-gray-300: #DEE2E6;
  --color-gray-400: #CED4DA;
  --color-gray-500: #ADB5BD;
  --color-gray-600: #868E96;
  --color-gray-700: #495057;
  --color-gray-800: #343A40;
  --color-gray-900: #212529;
  --color-black: #000000;

  /* ------------------------------------------------------------------
     Semantic Colors
     ------------------------------------------------------------------ */
  --color-success: #4CAF50;
  --color-warning: #FF9800;
  --color-error: #F44336;
  --color-info: #2196F3;

  /* ------------------------------------------------------------------
     Typography - Font Families
     ------------------------------------------------------------------ */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* ------------------------------------------------------------------
     Typography - 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 */

  /* ------------------------------------------------------------------
     Typography - Font Weights
     ------------------------------------------------------------------ */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-bold: 700;

  /* ------------------------------------------------------------------
     Typography - Line Heights
     ------------------------------------------------------------------ */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* ------------------------------------------------------------------
     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 */
  --space-32: 8rem;      /* 128px */

  /* ------------------------------------------------------------------
     Layout
     ------------------------------------------------------------------ */
  --container-max: 1200px;
  --container-wide: 1400px;
  --container-content: 1330px;
  --container-narrow: 900px;
  --container-padding: var(--space-6);
  --section-padding: var(--space-20) 0;
  --section-padding-lg: var(--space-24) 0;

  /* ------------------------------------------------------------------
     Grid
     ------------------------------------------------------------------ */
  --grid-gap: var(--space-8);
  --grid-gap-sm: var(--space-4);
  --grid-gap-lg: var(--space-12);

  /* ------------------------------------------------------------------
     Shadows
     ------------------------------------------------------------------ */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-nav: 0 2px 10px rgba(0, 0, 0, 0.1);

  /* ------------------------------------------------------------------
     Border Radius
     ------------------------------------------------------------------ */
  --radius-sm: 4px;
  --radius: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* ------------------------------------------------------------------
     Borders
     ------------------------------------------------------------------ */
  --border-color: var(--color-gray-200);
  --border-color-light: var(--color-gray-100);
  --border-width: 1px;
  --border: var(--border-width) solid var(--border-color);

  /* ------------------------------------------------------------------
     Transitions
     ------------------------------------------------------------------ */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-slower: 500ms ease;
  --transition-default: var(--transition-base);

  /* ------------------------------------------------------------------
     Z-Index Scale
     ------------------------------------------------------------------ */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-notification: 800;

  /* ------------------------------------------------------------------
     Opacity
     ------------------------------------------------------------------ */
  --opacity-disabled: 0.5;
  --opacity-hover: 0.85;
  --opacity-overlay: 0.6;
  --opacity-overlay-dark: 0.75;
}