/* ============================================
   Horizon University Design Tokens
   Shared design system variables for all frontends
   ============================================ */

/* Import Inter font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* ============================================
     COLOR SYSTEM
     ============================================ */

  /* Primary Colors */
  --hz-primary: #0066FF;
  --hz-primary-dark: #0052CC;
  --hz-primary-light: #E6F0FF;
  --hz-primary-hover: #0052CC;

  /* Secondary Colors */
  --hz-secondary: #00D4AA;
  --hz-secondary-dark: #00B894;
  --hz-secondary-light: #E6FFF9;

  /* Neutral Gray Scale */
  --hz-gray-50: #FAFAFA;
  --hz-gray-100: #F5F5F5;
  --hz-gray-200: #E5E5E5;
  --hz-gray-300: #D4D4D4;
  --hz-gray-400: #A3A3A3;
  --hz-gray-500: #737373;
  --hz-gray-600: #525252;
  --hz-gray-700: #404040;
  --hz-gray-800: #262626;
  --hz-gray-900: #171717;

  /* Base Colors */
  --hz-white: #FFFFFF;
  --hz-black: #000000;

  /* Semantic Colors */
  --hz-success: #10B981;
  --hz-success-light: #D1FAE5;
  --hz-warning: #F59E0B;
  --hz-warning-light: #FEF3C7;
  --hz-error: #EF4444;
  --hz-error-light: #FEE2E2;
  --hz-info: #3B82F6;
  --hz-info-light: #DBEAFE;

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

  /* Font Families */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", sans-serif;
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "SF Mono", "Monaco", "Inconsolata", "Fira Mono", "Droid Sans Mono", "Source Code Pro", 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 */
  --text-7xl: 4.5rem;      /* 72px */

  /* Font Weights */
  --font-light: 300;
  --font-regular: 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: 0em;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;

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

  --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-7: 1.75rem;      /* 28px */
  --space-8: 2rem;         /* 32px */
  --space-9: 2.25rem;      /* 36px */
  --space-10: 2.5rem;      /* 40px */
  --space-11: 2.75rem;     /* 44px */
  --space-12: 3rem;        /* 48px */
  --space-14: 3.5rem;      /* 56px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */
  --space-24: 6rem;        /* 96px */
  --space-28: 7rem;        /* 112px */
  --space-32: 8rem;        /* 128px */
  --space-36: 9rem;        /* 144px */
  --space-40: 10rem;       /* 160px */
  --space-44: 11rem;       /* 176px */
  --space-48: 12rem;       /* 192px */
  --space-52: 13rem;       /* 208px */
  --space-56: 14rem;       /* 224px */
  --space-60: 15rem;       /* 240px */
  --space-64: 16rem;       /* 256px */
  --space-72: 18rem;       /* 288px */
  --space-80: 20rem;       /* 320px */
  --space-96: 24rem;       /* 384px */

  /* ============================================
     SHADOW SYSTEM
     ============================================ */

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.3);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --shadow-none: 0 0 0 0 rgba(0, 0, 0, 0);

  /* ============================================
     BORDER RADIUS SYSTEM
     ============================================ */

  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-base: 0.375rem; /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-3xl: 2rem;      /* 32px */
  --radius-full: 9999px;   /* Full round */

  /* ============================================
     BORDER WIDTH
     ============================================ */

  --border-0: 0;
  --border-1: 1px;
  --border-2: 2px;
  --border-4: 4px;
  --border-8: 8px;

  /* ============================================
     TRANSITION SYSTEM
     ============================================ */

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Transition Properties */
  --transition-all: all var(--transition-base);
  --transition-colors: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
  --transition-opacity: opacity var(--transition-base);
  --transition-shadow: box-shadow var(--transition-base);
  --transition-transform: transform var(--transition-base);

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

  --z-0: 0;
  --z-10: 10;
  --z-20: 20;
  --z-30: 30;
  --z-40: 40;
  --z-50: 50;
  --z-auto: auto;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* ============================================
     LAYOUT WIDTHS
     ============================================ */

  --container-xs: 20rem;    /* 320px */
  --container-sm: 24rem;    /* 384px */
  --container-md: 28rem;    /* 448px */
  --container-lg: 32rem;    /* 512px */
  --container-xl: 36rem;    /* 576px */
  --container-2xl: 42rem;   /* 672px */
  --container-3xl: 48rem;   /* 768px */
  --container-4xl: 56rem;   /* 896px */
  --container-5xl: 64rem;   /* 1024px */
  --container-6xl: 72rem;   /* 1152px */
  --container-7xl: 80rem;   /* 1280px */
  --container-full: 100%;

  /* ============================================
     BREAKPOINTS (for reference in media queries)
     ============================================ */

  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ============================================
   GLOBAL RESETS & BASE STYLES
   ============================================ */

* {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--hz-gray-900);
  background-color: var(--hz-white);
}