/**
 * CSS Variables - Centralized Design Tokens
 * This file defines all CSS custom properties used across the site.
 * Import this file first in your main stylesheet or HTML.
 */

:root {
  /* ===== COLORS ===== */

  /* Primary colors */
  --color-primary: #000000;
  --color-secondary: #ffffff;
  --color-accent: #0066ff;
  --color-accent-hover: #0052cc;

  /* Text colors */
  --color-text: #000000;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-text-inverse: #ffffff;

  /* Background colors */
  --color-bg: #ffffff;
  --color-bg-light: #f5f5f5;
  --color-bg-dark: #1a1a1a;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);

  /* Border colors */
  --color-border: #e0e0e0;
  --color-border-light: rgba(255, 255, 255, 0.1);
  --color-border-dark: rgba(0, 0, 0, 0.1);

  /* Status colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* ===== TYPOGRAPHY ===== */

  /* Font families */
  --font-primary: 'Alliance No. 2', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Alliance No. 2', 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Font sizes - Desktop */
  --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 */
  --text-7xl: 4.5rem;    /* 72px */
  --text-8xl: 6rem;      /* 96px */

  /* Font weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

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

  /* Letter spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;

  /* ===== SPACING ===== */

  --space-0: 0;
  --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 widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  --container-max: 1920px;

  /* Content widths */
  --content-width: 1200px;
  --content-narrow: 800px;
  --content-wide: 1400px;

  /* ===== BORDERS ===== */

  --radius-none: 0;
  --radius-sm: 0.125rem;  /* 2px */
  --radius-base: 0.25rem; /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-full: 9999px;

  --border-width: 1px;
  --border-width-2: 2px;

  /* ===== 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 -1px rgba(0, 0, 0, 0.1);
  --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);

  /* ===== TRANSITIONS ===== */

  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 700ms;

  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* ===== Z-INDEX ===== */

  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 500;
  --z-fixed: 1000;
  --z-overlay: 5000;
  --z-modal: 10000;
  --z-tooltip: 15000;

  /* ===== NAVBAR ===== */

  --navbar-height: 60px;
  --navbar-padding: 0.75rem 2rem;
  --navbar-blur: 3px;
  --navbar-bg: rgba(255, 255, 255, 0.08);
  --navbar-bg-scrolled: rgba(255, 255, 255, 0.1);
}

/* ===== BREAKPOINT REFERENCE =====
 * Use these values in @media queries:
 *
 * Mobile:      max-width: 767px   (< 768px)
 * Tablet:      768px - 1023px
 * Desktop:     1024px - 1279px
 * Large:       1280px - 1439px
 * XL:          1440px - 1919px
 * 2XL:         >= 1920px
 *
 * Standard breakpoint values:
 * --breakpoint-sm:  640px
 * --breakpoint-md:  768px
 * --breakpoint-lg:  1024px
 * --breakpoint-xl:  1280px
 * --breakpoint-2xl: 1440px
 * --breakpoint-3xl: 1920px
 *
 * Note: CSS custom properties cannot be used in @media queries.
 * Use the pixel values directly or consider using CSS Container Queries
 * for component-level responsive design.
 */