/* ==============================================
  VARIABLES.CSS — CSS Custom Properties
  College Website Theme System
  ============================================== */

:root {
  /* ── Colors ── */
  --color-primary:        #0B3D91;
  --color-primary-dark:   #082d6a;
  --color-primary-light:  #1a56c4;
  --color-secondary:      #F4A623;
  --color-secondary-dark: #d4891a;
  --color-secondary-light:#ffbe4d;

  --color-success:        #28A745;
  --color-success-light:  #d4edda;
  --color-warning:        #FFC107;
  --color-warning-light:  #fff3cd;
  --color-danger:         #DC3545;
  --color-danger-light:   #f8d7da;
  --color-info:           #17A2B8;

  --color-bg:             #F8F9FA;
  --color-bg-alt:         #FFFFFF;
  --color-bg-dark:        #0B3D91;

  --color-text:           #212529;
  --color-text-secondary: #6C757D;
  --color-text-light:     #ADB5BD;
  --color-text-inverse:   #FFFFFF;

  --color-border:         #DEE2E6;
  --color-border-light:   #F1F3F5;

  /* ── Gradients ── */
  --gradient-primary:     linear-gradient(135deg, #0B3D91 0%, #1a56c4 100%);
  --gradient-hero:        linear-gradient(135deg, rgba(11,61,145,0.92) 0%, rgba(26,86,196,0.85) 100%);
  --gradient-gold:        linear-gradient(135deg, #F4A623 0%, #ffbe4d 100%);
  --gradient-card:        linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);

  /* ── Typography ── */
  --font-heading:         'Poppins', sans-serif;
  --font-body:            'Roboto', sans-serif;

  --fs-xs:   0.75rem;    /* 12px */
  --fs-sm:   0.875rem;   /* 14px */
  --fs-base: 1rem;       /* 16px */
  --fs-md:   1.125rem;   /* 18px */
  --fs-lg:   1.25rem;    /* 20px */
  --fs-xl:   1.5rem;     /* 24px */
  --fs-2xl:  1.8rem;     /* ~29px */
  --fs-3xl:  2.25rem;    /* 36px */
  --fs-4xl:  3rem;       /* 48px */

  --fw-light:   300;
  --fw-normal:  400;
  --fw-medium:  500;
  --fw-semi:    600;
  --fw-bold:    700;
  --fw-black:   800;

  --lh-tight:   1.2;
  --lh-normal:  1.6;
  --lh-relaxed: 1.8;

  /* ── Spacing (8px Grid) ── */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

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

  /* ── Shadows ── */
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-base:  0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-md:    0 10px 25px rgba(0,0,0,0.10), 0 4px 10px rgba(0,0,0,0.06);
  --shadow-lg:    0 20px 50px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.08);
  --shadow-primary: 0 8px 24px rgba(11,61,145,0.30);
  --shadow-gold:    0 8px 24px rgba(244,166,35,0.35);

  /* ── Transitions ── */
  --transition-fast:   all 0.15s ease;
  --transition-base:   all 0.25s ease;
  --transition-slow:   all 0.40s ease;

  /* ── Layout ── */
  --container-max:  1200px;
  --navbar-height:  72px;
  --sidebar-width:  260px;

  /* ── Z-Index ── */
  --z-dropdown:   100;
  --z-sticky:     200;
  --z-overlay:    300;
  --z-modal:      400;
  --z-toast:      500;
}