[data-theme="dark"] {
  color-scheme: dark;
}

[data-theme="dark"] .btn-primary {
  color: #0d0d0d;
}

[data-theme="dark"] .btn-primary:hover {
  color: #0d0d0d;
}

[data-theme="dark"] .quick-action-icon {
  background: rgba(240, 232, 220, 0.12);
  color: var(--primary);
}

[data-theme="dark"] .focus-mode-icon {
  background: rgba(240, 232, 220, 0.12);
  color: var(--primary);
}

[data-theme="dark"] .sidebar,
[data-theme="dark"] .topbar,
[data-theme="dark"] .card,
[data-theme="dark"] .score-card,
[data-theme="dark"] .quick-action-card,
[data-theme="dark"] .focus-mode-card,
[data-theme="dark"] .plan-card,
[data-theme="dark"] .pricing-card,
[data-theme="dark"] .modal-container,
[data-theme="dark"] .doubt-input-area,
[data-theme="dark"] .doubt-response,
[data-theme="dark"] .coming-soon-card {
  background: rgba(24, 24, 24, 0.68);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

[data-theme="dark"] .topbar {
  background: rgba(13, 13, 13, 0.72);
}

[data-theme="dark"] .nav-item:hover,
[data-theme="dark"] .topbar-search,
[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea,
[data-theme="dark"] .stat-item,
[data-theme="dark"] .chapter-item,
[data-theme="dark"] .timer-display {
  background: rgba(255, 255, 255, 0.055);
  border-color: rgba(255, 255, 255, 0.09);
}

[data-theme="light"] {
  color-scheme: light;
}

[data-theme="light"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: none; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}