/**
 * Design Tokens - Workplace Management App
 * Modern design system foundation
 *
 * Usage: Import this file first in base.html before other CSS
 */

:root {
  /* ============================================
     COLOR PALETTE - Modern, Professional SaaS
     ============================================ */

  /* Primary - Professional Blue */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Success - Modern Green */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-300: #86efac;
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;
  --color-success-800: #166534;
  --color-success-900: #14532d;

  /* Warning - Warm Amber */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-200: #fde68a;
  --color-warning-300: #fcd34d;
  --color-warning-400: #fbbf24;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  --color-warning-700: #b45309;
  --color-warning-800: #92400e;
  --color-warning-900: #78350f;

  /* Danger - Vibrant Red */
  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-200: #fecaca;
  --color-danger-300: #fca5a5;
  --color-danger-400: #f87171;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;
  --color-danger-700: #b91c1c;
  --color-danger-800: #991b1b;
  --color-danger-900: #7f1d1d;

  /* Info - Bright Cyan */
  --color-info-50: #ecfeff;
  --color-info-100: #cffafe;
  --color-info-200: #a5f3fc;
  --color-info-300: #67e8f9;
  --color-info-400: #22d3ee;
  --color-info-500: #06b6d4;
  --color-info-600: #0891b2;
  --color-info-700: #0e7490;
  --color-info-800: #155e75;
  --color-info-900: #164e63;

  /* Neutral/Gray Scale */
  --color-neutral-50: #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;

  /* Semantic Color Mappings (for easy reference) */
  --color-primary: var(--color-primary-600);
  --color-success: var(--color-success-600);
  --color-warning: var(--color-warning-500);
  --color-danger: var(--color-danger-600);
  --color-info: var(--color-info-600);

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: var(--color-neutral-50);
  --bg-tertiary: var(--color-neutral-100);
  --bg-elevated: #ffffff;

  /* Text Colors */
  --text-primary: var(--color-neutral-900);
  --text-secondary: var(--color-neutral-600);
  --text-tertiary: var(--color-neutral-500);
  --text-disabled: var(--color-neutral-400);
  --text-inverse: #ffffff;

  /* Border Colors */
  --border-light: var(--color-neutral-200);
  --border-medium: var(--color-neutral-300);
  --border-dark: var(--color-neutral-400);

  /* ============================================
     SPACING SCALE - 8px Base System
     ============================================ */

  --space-0: 0;
  --space-0-5: 0.125rem;  /* 2px */
  --space-1: 0.25rem;     /* 4px */
  --space-1-5: 0.375rem;  /* 6px */
  --space-2: 0.5rem;      /* 8px */
  --space-2-5: 0.625rem;  /* 10px */
  --space-3: 0.75rem;     /* 12px */
  --space-3-5: 0.875rem;  /* 14px */
  --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 */

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

  /* Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', 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 */

  /* Font Weights */
  --font-thin: 100;
  --font-extralight: 200;
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  --font-black: 900;

  /* 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;
  --tracking-widest: 0.1em;

  /* ============================================
     SHADOWS - Elevation 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 25px 50px -12px rgba(0, 0, 0, 0.35);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

  /* ============================================
     BORDER RADIUS - Rounded Corners
     ============================================ */

  --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;

  /* ============================================
     Z-INDEX SCALE - Layering System
     ============================================ */

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

  /* ============================================
     TRANSITIONS - Timing & Easing
     ============================================ */

  --transition-fast: 150ms;
  --transition-base: 200ms;
  --transition-medium: 300ms;
  --transition-slow: 500ms;

  --ease-linear: linear;
  --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);

  /* ============================================
     COMPONENT-SPECIFIC TOKENS
     ============================================ */

  /* Buttons */
  --btn-padding-y-sm: var(--space-2);
  --btn-padding-x-sm: var(--space-3);
  --btn-padding-y: var(--space-2-5);
  --btn-padding-x: var(--space-4);
  --btn-padding-y-lg: var(--space-3);
  --btn-padding-x-lg: var(--space-6);
  --btn-border-radius: var(--radius-md);
  --btn-font-weight: var(--font-medium);

  /* Cards */
  --card-padding: var(--space-6);
  --card-border-radius: var(--radius-lg);
  --card-shadow: var(--shadow-sm);
  --card-border: 1px solid var(--border-light);

  /* Forms */
  --input-padding-y: var(--space-2-5);
  --input-padding-x: var(--space-3-5);
  --input-border-radius: var(--radius-md);
  --input-border: 1px solid var(--border-medium);
  --input-focus-border: var(--color-primary-500);
  --input-focus-shadow: 0 0 0 3px var(--color-primary-100);

  /* Tables */
  --table-row-height: 3.5rem;    /* 56px */
  --table-header-bg: var(--bg-secondary);
  --table-border: var(--border-light);
  --table-hover-bg: var(--color-neutral-50);

  /* Navigation */
  --nav-height: 4rem;            /* 64px */
  --sidenav-width: 16rem;        /* 256px */
  --sidenav-collapsed-width: 4rem; /* 64px */
}

/* ============================================
   DARK MODE TOKENS (Future Enhancement)
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Uncomment when dark mode is implemented
    --bg-primary: var(--color-neutral-900);
    --bg-secondary: var(--color-neutral-800);
    --bg-tertiary: var(--color-neutral-700);
    --text-primary: var(--color-neutral-50);
    --text-secondary: var(--color-neutral-300);
    --text-tertiary: var(--color-neutral-400);
    */
  }
}

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

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Improved focus styles for accessibility */
*:focus-visible {
  outline: 3px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Remove default focus for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* Smooth transitions by default */
a, button, input, select, textarea {
  transition: all var(--transition-base) var(--ease-in-out);
}

/* Improve button appearance */
button {
  cursor: pointer;
  font-family: inherit;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}