:root {
  /* Light Mode Colors (existing) */
  --primary-color: #ff4d6d;
  --primary-light: #ff8fa3;
  --primary-dark: #c9184a;
  --secondary-color: #4361ee;
  --secondary-light: #7f94ff;
  --secondary-dark: #2b4acb;
  
  --dark-color: #2b2d42;
  --dark-gray: #555b6e;
  --medium-gray: #8d99ae;
  --light-gray: #edf2f4;
  --white: #ffffff;
  --off-white: #f8f9fa;
  
  /* Text colors */
  --text-primary: var(--dark-color);
  --text-secondary: var(--dark-gray);
  --text-muted: var(--medium-gray);
  
  /* Background colors */
  --bg-primary: var(--white);
  --bg-secondary: var(--off-white);
  --bg-tertiary: var(--light-gray);
  
  /* Border colors */
  --border-light: #e9ecef;
  --border-medium: #dee2e6;
  --border-dark: #adb5bd;
  
  /* Shadow colors */
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-dark: rgba(0, 0, 0, 0.15);
}

/* Dark Mode Variables */
[data-theme="dark"] {
  /* Primary colors remain the same for branding */
  --primary-color: #ff5574;
  --primary-light: #ff8fa3;
  --primary-dark: #e63946;
  
  /* Adjusted secondary for better contrast in dark */
  --secondary-color: #6c7ce7;
  --secondary-light: #8fa8ff;
  --secondary-dark: #4361ee;
  
  /* Dark mode specific colors */
  --dark-color: #f8f9fa;
  --dark-gray: #e9ecef;
  --medium-gray: #adb5bd;
  --light-gray: #495057;
  --white: #1a1d29;
  --off-white: #242837;
  
  /* Text colors for dark mode */
  --text-primary: #f8f9fa;
  --text-secondary: #e9ecef;
  --text-muted: #adb5bd;
  
  /* Background colors for dark mode */
  --bg-primary: #1a1d29;
  --bg-secondary: #242837;
  --bg-tertiary: #2d3748;
  
  /* Border colors for dark mode */
  --border-light: #2d3748;
  --border-medium: #4a5568;
  --border-dark: #718096;
  
  /* Shadow colors for dark mode */
  --shadow-light: rgba(0, 0, 0, 0.3);
  --shadow-medium: rgba(0, 0, 0, 0.4);
  --shadow-dark: rgba(0, 0, 0, 0.5);
  
  /* Special dark mode colors */
  --card-bg: #242837;
  --card-bg-hover: #2d3748;
  --input-bg: #2d3748;
  --input-border: #4a5568;
}

/* Update existing styles to use CSS variables */
body {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
.site-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
}

/* Cards */
.quiz-card,
.class-type {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  box-shadow: 0 4px 6px var(--shadow-light);
}

.quiz-card:hover,
.class-type:hover {
  box-shadow: 0 8px 25px var(--shadow-medium);
}

/* Form elements */
.form-group input,
.form-group textarea {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

/* Navigation */
.main-navigation ul li a {
  color: var(--text-primary);
}

/* Footer */
.site-footer {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* Special adjustments for dark mode */
[data-theme="dark"] {
  /* Images with dark backgrounds */
  .hero-image img,
  .learn-image img {
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
  }
  
  /* Code blocks or pre elements */
  pre,
  code {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
  }
  
  /* Scrollbar styling */
  ::-webkit-scrollbar {
    width: 8px;
  }
  
  ::-webkit-scrollbar-track {
    background: var(--bg-secondary);
  }
  
  ::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: 4px;
  }
  
  ::-webkit-scrollbar-thumb:hover {
    background: var(--medium-gray);
  }
}