/**
 * Design System - Custom Properties & Tokens
 * A sophisticated design system for the certificate management platform
 */

:root {
  /* === Color Palette === */

  /* Brand Colors - Orange Primary */
  --color-brand-50: #fff7ed;
  --color-brand-100: #ffedd5;
  --color-brand-200: #fed7aa;
  --color-brand-300: #fdba74;
  --color-brand-400: #fb923c;
  --color-brand-500: #f97316;
  --color-brand-600: #ea580c;
  --color-brand-700: #c2410c;
  --color-brand-800: #9a3412;
  --color-brand-900: #7c2d12;

  /* Neutral Colors - Clean Grays */
  --color-neutral-0: #ffffff;
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a3a3a3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;
  --color-neutral-950: #0a0a0a;

  /* Complementary Colors */
  /* Teal - for success/positive actions */
  --color-teal-50: #f0fdfa;
  --color-teal-100: #ccfbf1;
  --color-teal-500: #14b8a6;
  --color-teal-600: #0d9488;
  --color-teal-700: #0f766e;

  /* Amber - for warnings */
  --color-amber-50: #fffbeb;
  --color-amber-100: #fef3c7;
  --color-amber-500: #f59e0b;
  --color-amber-600: #d97706;
  --color-amber-700: #b45309;

  /* Red - for errors */
  --color-red-50: #fef2f2;
  --color-red-100: #fee2e2;
  --color-red-500: #ef4444;
  --color-red-600: #dc2626;
  --color-red-700: #b91c1c;

  /* Blue - for info */
  --color-blue-50: #eff6ff;
  --color-blue-100: #dbeafe;
  --color-blue-500: #3b82f6;
  --color-blue-600: #2563eb;
  --color-blue-700: #1d4ed8;

  /* Legacy semantic color mappings */
  --color-success-50: var(--color-teal-50);
  --color-success-100: var(--color-teal-100);
  --color-success-500: var(--color-teal-500);
  --color-success-600: var(--color-teal-600);
  --color-success-700: var(--color-teal-700);

  --color-warning-50: var(--color-amber-50);
  --color-warning-100: var(--color-amber-100);
  --color-warning-500: var(--color-amber-500);
  --color-warning-600: var(--color-amber-600);
  --color-warning-700: var(--color-amber-700);

  --color-error-50: var(--color-red-50);
  --color-error-100: var(--color-red-100);
  --color-error-500: var(--color-red-500);
  --color-error-600: var(--color-red-600);
  --color-error-700: var(--color-red-700);

  --color-info-50: var(--color-blue-50);
  --color-info-100: var(--color-blue-100);
  --color-info-500: var(--color-blue-500);
  --color-info-600: var(--color-blue-600);
  --color-info-700: var(--color-blue-700);

  /* === Typography === */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;

  /* Font Sizes - 8px Grid Based */
  --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 */

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* === Spacing === */
  --space-0-5: 0.125rem;  /* 2px */
  --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 */

  /* === Borders === */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-base: 0.5rem;   /* 8px */
  --radius-md: 0.75rem;    /* 12px */
  --radius-lg: 1rem;       /* 16px */
  --radius-xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;

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

  /* === Shadows === */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.03);
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.06);
  --shadow-md: 0 2px 4px -1px rgb(0 0 0 / 0.08);
  --shadow-lg: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 8px 15px -3px rgb(0 0 0 / 0.12);

  /* === Transitions === */
  --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 === */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 80px;
  --header-height: 64px;
  --max-content-width: 1400px;

  /* === Z-Index === */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-header: 1030;
  --z-fixed: 1040;
  --z-modal-backdrop: 1050;
  --z-modal: 1060;
  --z-popover: 1070;
  --z-tooltip: 1080;
}

/* === Dark Mode === */
[data-theme="dark"] {
  /* Dark mode colors */
  --color-neutral-0: #0f172a;
  --color-neutral-50: #1e293b;
  --color-neutral-100: #334155;
  --color-neutral-200: #475569;
  --color-neutral-300: #64748b;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #cbd5e1;
  --color-neutral-600: #e2e8f0;
  --color-neutral-700: #f1f5f9;
  --color-neutral-800: #f8fafc;
  --color-neutral-900: #ffffff;

  /* Adjusted brand colors for dark mode */
  --color-brand-500: #818cf8;
  --color-brand-600: #a5b4fc;
}

/* === Base Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-0);
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-neutral-900);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-brand-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-brand-700);
}

/* === Focus States === */
*:focus-visible {
  outline: 2px solid var(--color-brand-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* === Selection === */
::selection {
  background-color: var(--color-brand-200);
  color: var(--color-brand-900);
}

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-neutral-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-neutral-300);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-neutral-400);
}

/* === Responsive Grid Utilities === */
/* Base mobile-first grid classes */
.grid {
  display: grid !important;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Medium screens (tablets, 768px and up) */
@media (min-width: 768px) {
  .md\:grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }

  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .md\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Large screens (desktops, 1024px and up) */
@media (min-width: 1024px) {
  .lg\:grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }

  .lg\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}