/* Digital Transitions Design System */
/* Based on heritage-digitaltransitions.com and nexus.digitaltransitions.com branding */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Primary Brand Colors - Dark Blue */
  --dt-primary: #273344;        /* Dark blue */
  --dt-primary-hover: #1f2937;  /* Darker blue on hover */
  --dt-primary-dark: #1a202c;   /* Even darker blue */
  --dt-primary-light: #374151;  /* Lighter blue */
  
  /* Semantic Colors - Tailwind Standard */
  --dt-success: #10b981;        /* green-500 - for overlay buttons */
  --dt-success-hover: #059669;  /* green-600 */
  --dt-success-light: #d1fae5;  /* green-50 */
  --dt-warning: #f59e0b;        /* yellow-500 */
  --dt-warning-light: #fef3c7;  /* yellow-50 */
  --dt-error: #ef4444;          /* red-500 */
  --dt-error-light: #fef2f2;    /* red-50 */
  
  /* Neutral Palette - Tailwind Gray Scale */
  --dt-gray-50: #f9fafb;
  --dt-gray-100: #f3f4f6;
  --dt-gray-200: #e5e7eb;
  --dt-gray-300: #d1d5db;
  --dt-gray-400: #9ca3af;
  --dt-gray-500: #6b7280;
  --dt-gray-600: #4b5563;
  --dt-gray-700: #374151;
  --dt-gray-800: #1f2937;
  --dt-gray-900: #111827;
  
  /* Background Colors */
  --dt-bg-primary: #ffffff;     /* white */
  --dt-bg-secondary: #f9fafb;   /* gray-50 */
  --dt-bg-muted: #f3f4f6;       /* gray-100 */
  
  /* Font Families - System Stack with better readability */
  --dt-font-family-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --dt-font-family-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  
  /* Font Sizes - Adjusted for better hierarchy */
  --dt-text-xs: 0.75rem;      /* 12px */
  --dt-text-sm: 0.875rem;     /* 14px */
  --dt-text-base: 1rem;       /* 16px */
  --dt-text-lg: 1.125rem;     /* 18px */
  --dt-text-xl: 1.25rem;      /* 20px */
  --dt-text-2xl: 1.5rem;      /* 24px */
  --dt-text-3xl: 1.875rem;    /* 30px */
  --dt-text-4xl: 2.25rem;     /* 36px */
  --dt-text-5xl: 3rem;        /* 48px */
  
  /* Font Weights - Standard weights */
  --dt-font-light: 300;
  --dt-font-normal: 400;
  --dt-font-medium: 500;
  --dt-font-semibold: 600;
  --dt-font-bold: 700;
  
  /* Line Heights */
  --dt-leading-tight: 1.25;
  --dt-leading-normal: 1.5;
  --dt-leading-relaxed: 1.625;
  
  /* Spacing System - Tailwind Standard */
  --dt-space-1: 0.25rem;    /* 4px */
  --dt-space-2: 0.5rem;     /* 8px */
  --dt-space-3: 0.75rem;    /* 12px */
  --dt-space-4: 1rem;       /* 16px */
  --dt-space-5: 1.25rem;    /* 20px */
  --dt-space-6: 1.5rem;     /* 24px */
  --dt-space-8: 2rem;       /* 32px */
  --dt-space-10: 2.5rem;    /* 40px */
  --dt-space-12: 3rem;      /* 48px */
  --dt-space-16: 4rem;      /* 64px */
  --dt-space-20: 5rem;      /* 80px */
  
  /* Border Radius - More rounded for modern look */
  --dt-radius-sm: 0.25rem;   /* 4px */
  --dt-radius-md: 0.5rem;    /* 8px */
  --dt-radius-lg: 0.75rem;   /* 12px */
  --dt-radius-xl: 1rem;      /* 16px */
  --dt-radius-2xl: 1.25rem;  /* 20px */
  --dt-radius-full: 9999px;  /* Full rounded */
  
  /* Shadows - Softer, more elegant */
  --dt-shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.08);
  --dt-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --dt-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --dt-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.05);
  
  /* Focus Ring - Updated for dark blue primary */
  --dt-ring-primary: 0 0 0 3px rgb(39 51 68 / 0.5);
  
  /* Shadow colors for dark blue theme */
  --dt-shadow-primary: rgba(39, 51, 68, 0.15);
  --dt-shadow-primary-btn: rgba(39, 51, 68, 0.2);
  --dt-shadow-primary-btn-hover: rgba(39, 51, 68, 0.3);
}

/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--dt-font-family-primary);
  line-height: var(--dt-leading-normal);
  color: var(--dt-gray-900);
  background-color: var(--dt-bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
.dt-heading-1 {
  font-size: var(--dt-text-5xl);
  font-weight: var(--dt-font-normal);
  line-height: var(--dt-leading-tight);
  letter-spacing: -0.02em;
  color: white;
}

.dt-heading-2 {
  font-size: var(--dt-text-2xl);
  font-weight: var(--dt-font-bold);
  line-height: var(--dt-leading-tight);
  letter-spacing: -0.01em;
  color: var(--dt-gray-900);
}

.dt-heading-3 {
  font-size: var(--dt-text-xl);
  font-weight: var(--dt-font-semibold);
  line-height: var(--dt-leading-tight);
  color: var(--dt-gray-900);
}

.dt-body-lg {
  font-size: var(--dt-text-lg);
  font-weight: var(--dt-font-normal);
  line-height: var(--dt-leading-relaxed);
  color: var(--dt-gray-700);
}

.dt-body {
  font-size: var(--dt-text-base);
  font-weight: var(--dt-font-normal);
  line-height: var(--dt-leading-normal);
  color: var(--dt-gray-700);
}

.dt-body-sm {
  font-size: var(--dt-text-sm);
  font-weight: var(--dt-font-normal);
  line-height: var(--dt-leading-normal);
  color: var(--dt-gray-600);
}

/* ===== LAYOUT COMPONENTS ===== */
.dt-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--dt-space-5);
}

.dt-grid {
  display: grid;
  gap: var(--dt-space-6);
}

.dt-grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.dt-flex {
  display: flex;
  gap: var(--dt-space-4);
}

.dt-flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== CARD COMPONENTS ===== */
.dt-card {
  background: var(--dt-bg-primary);
  border-radius: var(--dt-radius-xl);
  box-shadow: var(--dt-shadow-md);
  overflow: hidden;
  transition: all 0.25s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.dt-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--dt-shadow-xl);
}

.dt-card-header {
  padding: var(--dt-space-6) var(--dt-space-6) var(--dt-space-5);
  background: linear-gradient(135deg, var(--dt-primary) 0%, var(--dt-primary-light) 100%);
  color: white;
}

.dt-card-header .dt-heading-2 {
  color: white;
  font-size: var(--dt-text-2xl);
  font-weight: var(--dt-font-bold);
  margin-bottom: var(--dt-space-1);
}

.dt-card-header .dt-body-sm {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--dt-text-sm);
}

.dt-card-body {
  padding: var(--dt-space-6);
}

.dt-stat-card {
  background: var(--dt-bg-primary);
  padding: var(--dt-space-8) var(--dt-space-6);
  border-radius: var(--dt-radius-xl);
  box-shadow: var(--dt-shadow-sm);
  text-align: center;
  border: 1px solid var(--dt-gray-200);
  transition: all 0.2s ease;
}

.dt-stat-card:hover {
  box-shadow: var(--dt-shadow-md);
  transform: translateY(-2px);
}

.dt-stat-number {
  font-size: var(--dt-text-4xl);
  font-weight: var(--dt-font-bold);
  color: var(--dt-primary);
  display: block;
  margin-bottom: var(--dt-space-2);
}

.dt-stat-label {
  color: var(--dt-gray-500);
  font-size: var(--dt-text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--dt-font-semibold);
}

/* ===== BUTTON COMPONENTS ===== */
.dt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: var(--dt-text-sm);
  font-weight: var(--dt-font-semibold);
  border-radius: var(--dt-radius-lg);
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 120px;
  text-align: center;
}

.dt-btn:focus {
  outline: none;
  box-shadow: var(--dt-ring-primary);
}

.dt-btn-primary {
  background: linear-gradient(135deg, var(--dt-primary) 0%, var(--dt-primary-light) 100%);
  color: white;
  box-shadow: 0 2px 4px var(--dt-shadow-primary-btn);
}

.dt-btn-primary:hover {
  background: linear-gradient(135deg, var(--dt-primary-hover) 0%, var(--dt-primary) 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--dt-shadow-primary-btn-hover);
}

.dt-btn-secondary {
  background: white;
  color: var(--dt-gray-700);
  border: 2px solid var(--dt-gray-300);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.dt-btn-secondary:hover {
  background: var(--dt-gray-50);
  border-color: var(--dt-gray-400);
  transform: translateY(-1px);
}

.dt-btn-success {
  background: linear-gradient(135deg, var(--dt-success) 0%, #14b885 100%);
  color: white;
  box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.dt-btn-success:hover {
  background: linear-gradient(135deg, var(--dt-success-hover) 0%, var(--dt-success) 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

/* ===== FORM COMPONENTS ===== */
.dt-input {
  width: 100%;
  padding: var(--dt-space-3) var(--dt-space-4);
  border: 2px solid var(--dt-gray-200);
  border-radius: var(--dt-radius-lg);
  font-size: var(--dt-text-base);
  transition: all 0.2s ease;
  background: var(--dt-bg-primary);
}

.dt-input:focus {
  outline: none;
  border-color: var(--dt-primary);
  box-shadow: var(--dt-ring-primary);
}

.dt-search-box {
  background: var(--dt-bg-primary);
  padding: var(--dt-space-5);
  border-radius: var(--dt-radius-xl);
  box-shadow: var(--dt-shadow-sm);
  margin-bottom: var(--dt-space-8);
  border: 1px solid var(--dt-gray-200);
}

/* ===== HEADER COMPONENTS ===== */
.dt-header {
  background: linear-gradient(135deg, var(--dt-primary) 0%, var(--dt-primary-light) 100%);
  color: white;
  padding: var(--dt-space-12) var(--dt-space-6);
  margin: calc(-1 * var(--dt-space-5)) calc(-1 * var(--dt-space-5)) var(--dt-space-8);
  border-radius: 0 0 var(--dt-radius-2xl) var(--dt-radius-2xl);
  text-align: center;
  box-shadow: 0 4px 12px var(--dt-shadow-primary);
}

.dt-header h1 {
  font-size: var(--dt-text-5xl);
  margin-bottom: var(--dt-space-3);
  font-weight: var(--dt-font-normal);
  letter-spacing: -0.02em;
  color: white;
}

.dt-header p {
  font-size: var(--dt-text-lg);
  color: white;
  opacity: 1;
  font-weight: var(--dt-font-normal);
}

/* ===== TAG COMPONENTS ===== */
.dt-tag {
  background: var(--dt-gray-100);
  color: var(--dt-gray-700);
  padding: var(--dt-space-1) var(--dt-space-3);
  border-radius: var(--dt-radius-full);
  font-size: var(--dt-text-sm);
  font-weight: var(--dt-font-medium);
  display: inline-block;
}

.dt-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--dt-space-2);
  margin-bottom: var(--dt-space-4);
}

/* ===== NAVIGATION COMPONENTS ===== */
.dt-breadcrumb {
  margin-bottom: var(--dt-space-4);
}

.dt-breadcrumb a {
  color: var(--dt-primary);
  text-decoration: none;
  font-size: var(--dt-text-sm);
}

.dt-breadcrumb a:hover {
  text-decoration: underline;
}

/* ===== FOOTER COMPONENTS ===== */
.dt-footer {
  text-align: center;
  margin-top: var(--dt-space-12);
  padding: var(--dt-space-8);
  color: var(--dt-gray-500);
  border-top: 1px solid var(--dt-gray-200);
}

.dt-footer a {
  color: var(--dt-primary);
  text-decoration: none;
}

.dt-footer a:hover {
  text-decoration: underline;
}

/* ===== RESPONSIVE UTILITIES ===== */
@media (max-width: 768px) {
  .dt-container {
    padding: var(--dt-space-3);
  }
  
  .dt-header h1 {
    font-size: var(--dt-text-3xl);
  }
  
  .dt-grid-auto {
    grid-template-columns: 1fr;
  }
  
  .dt-flex {
    flex-direction: column;
  }
  
  .dt-btn {
    width: 100%;
    min-width: auto;
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
.dt-btn:focus-visible,
.dt-input:focus-visible {
  box-shadow: var(--dt-ring-primary);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .dt-card {
    border: 1px solid var(--dt-gray-300);
  }
  
  .dt-btn-primary {
    border: 2px solid var(--dt-primary-dark);
  }
}