/* Responsive Styles */

/* Tablet and smaller */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
  }

  .menu-toggle {
    display: block;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .content {
    padding: 24px 16px 64px;
  }

  .hero {
    padding: 48px 16px;
    margin: -24px -16px 32px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .content h1 {
    font-size: 1.75rem;
  }

  .content h2 {
    font-size: 1.25rem;
  }

  .lesson-meta {
    flex-direction: column;
    gap: 12px;
  }

  .lesson-nav {
    flex-direction: column;
  }

  .lesson-nav-btn {
    max-width: 100%;
  }
}

/* Print styles */
@media print {
  .header, .sidebar, .lesson-nav, .menu-toggle {
    display: none !important;
  }
  .main {
    margin: 0;
  }
  .content {
    max-width: 100%;
    padding: 0;
  }
}