/**
 * Dark Mode CSS for EduVai Theme
 * Provides comprehensive dark mode support with CSS variables
 */

/* Dark Mode Color Scheme */
:root {
  /* Light mode colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f9f9f9;
  --color-text-primary: #444444;
  --color-text-secondary: #666666;
  --color-border: #e0e0e0;
  --color-link: #4154f1;
  --color-link-hover: #717ff5;
  --color-shadow: rgba(0, 0, 0, 0.1);
}

/* Dark mode colors */
html.dark-mode {
  --color-bg-primary: #1a1a1a;
  --color-bg-secondary: #2d2d2d;
  --color-text-primary: #f8f9fa;
  --color-text-secondary: #ced4da;
  --color-border: #444444;
  --color-link: #8a9aff;
  --color-link-hover: #b3bdff;
  --color-shadow: rgba(0, 0, 0, 0.3);
}

/* Apply dark mode to body and main elements */
html.dark-mode,
html.dark-mode body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
}

html.dark-mode a {
  color: var(--color-link);
}

html.dark-mode a:hover {
  color: var(--color-link-hover);
}

/* Header and Navigation */
html.dark-mode #header {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  box-shadow: 0 2px 20px var(--color-shadow);
}

html.dark-mode #header.header-scrolled {
  background-color: rgba(45, 45, 45, 0.95);
}

html.dark-mode .navbar-nav .nav-link {
  color: var(--color-text-primary) !important;
}

html.dark-mode .navbar-nav .nav-link:hover,
html.dark-mode .navbar-nav .nav-link.active {
  color: var(--color-link) !important;
}

/* Sections */
html.dark-mode section {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
}

html.dark-mode section.section-bg {
  background-color: var(--color-bg-secondary);
}

/* Cards and Containers */
html.dark-mode .card,
html.dark-mode .card-body {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

html.dark-mode .card-title {
  color: var(--color-text-primary);
}

/* Buttons */
html.dark-mode .btn-primary {
  background-color: #4154f1;
  border-color: #4154f1;
  color: #ffffff;
}

html.dark-mode .btn-primary:hover {
  background-color: #6b7aff;
  border-color: #6b7aff;
}

html.dark-mode .btn-secondary {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

html.dark-mode .btn-secondary:hover {
  background-color: #3a3a3a;
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

/* Forms */
html.dark-mode .form-control,
html.dark-mode .form-select,
html.dark-mode textarea {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

html.dark-mode .form-control:focus,
html.dark-mode .form-select:focus,
html.dark-mode textarea:focus {
  background-color: var(--color-bg-secondary);
  border-color: #4154f1;
  color: var(--color-text-primary);
  box-shadow: 0 0 0 0.2rem rgba(65, 84, 241, 0.25);
}

html.dark-mode .form-control::placeholder {
  color: var(--color-text-secondary);
}

/* Table */
html.dark-mode table {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

html.dark-mode thead {
  background-color: #3a3a3a;
  color: var(--color-text-primary);
}

html.dark-mode tbody tr:hover {
  background-color: #3a3a3a;
}

html.dark-mode table td,
html.dark-mode table th {
  border-color: var(--color-border);
}

/* MCQ Question Display */
html.dark-mode .eduvai-mcq-container,
html.dark-mode .question-body {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

html.dark-mode .eduvai-mcq-options {
  color: var(--color-text-primary);
}

html.dark-mode .eduvai-mcq-options li {
  background-color: var(--color-bg-primary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
  transition: all 0.3s ease;
}

html.dark-mode .eduvai-mcq-options li:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-link);
}

html.dark-mode .eduvai-mcq-options li.selected {
  background-color: #4154f1;
  border-color: #4154f1;
  color: #ffffff;
}

html.dark-mode .eduvai-mcq-options li.correct {
  background-color: #28a745;
  border-color: #28a745;
  color: #ffffff;
}

html.dark-mode .eduvai-mcq-options li.incorrect {
  background-color: #dc3545;
  border-color: #dc3545;
  color: #ffffff;
}

/* Code blocks */
html.dark-mode pre {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

html.dark-mode code {
  background-color: var(--color-bg-secondary);
  color: #6b7aff;
  border-color: var(--color-border);
}

/* Modal */
html.dark-mode .modal-content {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

html.dark-mode .modal-header {
  border-color: var(--color-border);
  background-color: #2d2d2d;
}

html.dark-mode .modal-title {
  color: var(--color-text-primary);
}

html.dark-mode .btn-close {
  filter: invert(1);
}

/* Dropdown */
html.dark-mode .dropdown-menu {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border);
}

html.dark-mode .dropdown-item {
  color: var(--color-text-primary);
}

html.dark-mode .dropdown-item:hover,
html.dark-mode .dropdown-item:focus {
  background-color: #3a3a3a;
  color: var(--color-link);
}

/* Alert */
html.dark-mode .alert-info {
  background-color: #1e3a5f;
  border-color: #4154f1;
  color: #b8d4ff;
}

html.dark-mode .alert-warning {
  background-color: #5f4e1e;
  border-color: #ff9800;
  color: #ffd699;
}

html.dark-mode .alert-danger {
  background-color: #5f1e1e;
  border-color: #dc3545;
  color: #ff9999;
}

html.dark-mode .alert-success {
  background-color: #1e5f3a;
  border-color: #28a745;
  color: #99ff99;
}

/* Back to top button */
html.dark-mode .back-to-top {
  background-color: #4154f1;
  color: #ffffff;
}

html.dark-mode .back-to-top:hover {
  background-color: #6b7aff;
}

/* Scrollbar in dark mode */
html.dark-mode ::-webkit-scrollbar {
  width: 10px;
}

html.dark-mode ::-webkit-scrollbar-track {
  background-color: var(--color-bg-secondary);
}

html.dark-mode ::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 5px;
}

html.dark-mode ::-webkit-scrollbar-thumb:hover {
  background-color: #666666;
}

/* Dark Mode Toggle Button Styles */
.theme-toggle-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  background-color: #4154f1;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px var(--color-shadow);
  transition: all 0.3s ease;
  padding: 0;
}

.theme-toggle-btn:hover {
  background-color: #6b7aff;
  transform: scale(1.1);
  box-shadow: 0 6px 16px var(--color-shadow);
}

.theme-toggle-btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(65, 84, 241, 0.3);
}

html.dark-mode .theme-toggle-btn {
  background-color: #6b7aff;
}

html.dark-mode .theme-toggle-btn:hover {
  background-color: #4154f1;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .theme-toggle-btn {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
    font-size: 18px;
  }
}

/* Ensure smooth transitions */
html, html *,
body, body * {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Avoid transition on certain elements for better UX */
.no-transition,
.no-transition * {
  transition: none !important;
}

/* Reduce motion preference */
@media (prefers-reduced-motion: reduce) {
  html, html *,
  body, body * {
    transition: none !important;
  }
}