/* ==========================================================================
   Design Tokens — CSS Custom Properties
   Central design token definitions for the School Management ERP UI.
   All visual tokens (colors, typography, spacing, shadows, transitions,
   layout) are defined here under :root and consumed by other CSS files.
   ========================================================================== */

:root {
  /* ------------------------------------------------------------------
     Color Palette — 5 primary colors + shades
     ------------------------------------------------------------------ */
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-light: #eef2ff;
  --color-primary-50: #f5f3ff;
  --color-secondary: #64748b;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* ------------------------------------------------------------------
     Typography
     ------------------------------------------------------------------ */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.8125rem;    /* 13px */
  --text-base: 0.875rem;   /* 14px */
  --text-lg: 1rem;         /* 16px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.375rem;    /* 22px */
  --text-3xl: 2rem;        /* 32px */

  /* ------------------------------------------------------------------
     4px-Based Spacing System
     ------------------------------------------------------------------ */
  --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;

  /* ------------------------------------------------------------------
     Border Radius
     ------------------------------------------------------------------ */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* ------------------------------------------------------------------
     Shadow Layers
     ------------------------------------------------------------------ */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  /* ------------------------------------------------------------------
     Transition Animations
     ------------------------------------------------------------------ */
  --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);

  /* ------------------------------------------------------------------
     Layout
     ------------------------------------------------------------------ */
  --topbar-height: 64px;
  --topbar-height-mobile: 56px;
  --content-max-width: 1440px;
  --sidebar-width: 0px; /* Sidebar removed */
}