:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-hover: #1e40af;
  --bg-main: #f8fafc;
  --bg-white: #ffffff;
  --bg-hover: #f1f5f9;
  --border-color: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  
  /* Animation */
  --transition-speed: 0.3s;
}

body {
  font-family: Arial;
  background-color: var(--bg-main);
  margin: 0;
  padding: var(--spacing-lg);
}

/* Tab Container */
.tab {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  transition: background-color var(--transition-duration) var(--transition-timing),
              border-color var(--transition-duration) var(--transition-timing);
}

/* Tab Buttons */
.tab button.tablinks {
  flex: 1;
  min-width: 120px;
  padding: 0.75rem 1.25rem;
  background-color: transparent;
  border: 1px solid var(--color-border-primary);
  border-radius: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-duration) var(--transition-timing);
}

/* Tab Button Hover State */
.tab button.tablinks:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

/* Active Tab */
.tab button.tablinks.active {
  background-color: var(--color-bg-accent);
  color: var(--color-text-on-accent);
  border-color: var(--color-bg-accent);
}

/* Tab Content Container */
.tabcontent {
  display: none;
  padding: 1.5rem;
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: 0.75rem;
  animation: fadeIn 0.3s ease-in;
  margin-top: 1rem;
  transition: background-color var(--transition-duration) var(--transition-timing),
              border-color var(--transition-duration) var(--transition-timing);
}

/* Active Tab Content */
.tabcontent.active {
  display: block;
}

/* Tab Content Typography */
.tabcontent h3 {
  color: var(--color-text-primary);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border-primary);
}

.tabcontent p {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* Link Styles in Tabs */
.tab button.tablinks a {
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tab button.tablinks a i {
  font-size: 0.75rem;
}

/* Dark Mode Toggle Button */
.tab button[onclick="toggleTheme()"] {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
}

.tab button[onclick="toggleTheme()"]:hover {
  background-color: var(--color-bg-accent);
  color: var(--color-text-on-accent);
}

/* Fade Animation */
@keyframes fadeIn {
  from {
      opacity: 0;
      transform: translateY(5px);
  }
  to {
      opacity: 1;
      transform: translateY(0);
  }
}

/* Main Title Styling */
h1 {
  color: var(--color-text-primary);
  font-size: 2.5rem;
  text-align: center;
  margin: 2rem 0;
  font-weight: bold;
}

/* Special Content Styling */
.tabcontent span {
  display: block;
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
}

/* Link Styling inside Tab Content */
.tabcontent a {
  color: var(--color-text-accent);
  text-decoration: none;
  transition: color var(--transition-duration) var(--transition-timing);
}

.tabcontent a:hover {
  text-decoration: underline;
}

/* Media Queries for Responsiveness */
@media (max-width: 768px) {
  .tab {
      flex-direction: column;
      padding: 0.75rem;
  }

  .tab button.tablinks {
      width: 100%;
      min-width: auto;
  }

  .tabcontent {
      padding: 1rem;
      margin-top: 0.5rem;
  }

  h1 {
      font-size: 2rem;
      margin: 1.5rem 0;
  }

  .tabcontent h3 {
      font-size: 1.25rem;
  }
}

/* High Contrast Support */
@media (forced-colors: active) {
  .tab button.tablinks.active {
      forced-color-adjust: none;
      background-color: Highlight;
      color: HighlightText;
  }
}

/* Print Styles */
@media print {
  .tab {
      display: none;
  }

  .tabcontent {
      display: block !important;
      border: none;
      padding: 0;
  }

  .tabcontent h3 {
      border-bottom: 1px solid #000;
  }
}