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

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

  .main-content {
    margin-left: 0;
  }

  .hamburger-btn {
    display: flex;
  }

  .search-box input {
    width: 180px;
  }

  .search-box input:focus {
    width: 220px;
  }

  .domain-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .overall-progress {
    flex-direction: column;
    text-align: center;
  }

  .stat-row {
    justify-content: center;
  }

  .streak-grid {
    grid-template-columns: repeat(15, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --space-xl: 20px;
    --space-2xl: 32px;
  }

  .app-header {
    padding: 0 var(--space-md);
  }

  .header-right {
    gap: var(--space-sm);
  }

  .search-box {
    display: none;
  }

  .mode-tabs {
    display: none;
  }

  .content-area {
    padding: var(--space-md);
  }

  .domain-cards {
    grid-template-columns: 1fr;
  }

  .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }

  .concepts-grid {
    grid-template-columns: 1fr;
  }

  .quick-actions {
    flex-direction: column;
  }

  .quick-action {
    min-width: unset;
  }

  .domain-header-content {
    flex-direction: column;
  }

  .domain-header-icon {
    width: 48px;
    height: 48px;
  }

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

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

  .flashcard-face {
    padding: var(--space-lg);
  }

  .flashcard-text {
    font-size: var(--font-lg);
  }

  .rating-buttons {
    flex-direction: row;
    gap: var(--space-sm);
  }

  .rating-btn {
    padding: var(--space-sm);
  }

  .mode-options {
    grid-template-columns: 1fr;
  }

  .answer-option {
    padding: var(--space-sm) var(--space-md);
  }

  .results-stats {
    gap: var(--space-lg);
  }

  .results-score {
    font-size: 3rem;
  }

  .deck-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .domain-checkboxes {
    grid-template-columns: 1fr;
  }

  .streak-grid {
    grid-template-columns: repeat(10, 1fr);
  }

  .dashboard-header h1 {
    font-size: var(--font-2xl);
  }

  .domain-weight-bar {
    height: 24px;
    font-size: 9px;
  }

  .breakdown-label {
    width: 80px;
  }
}

/* Mobile Bottom Nav */
@media (max-width: 768px) {
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    z-index: 100;
    padding: var(--space-xs) 0;
    padding-bottom: env(safe-area-inset-bottom, var(--space-xs));
  }

  .mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-xs) 0;
    text-decoration: none;
    color: var(--text-dim);
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    background: none;
    font-family: var(--font-family);
  }

  .mobile-nav-item i {
    font-size: var(--font-lg);
  }

  .mobile-nav-item.active {
    color: var(--domain1);
  }

  body {
    padding-bottom: 64px;
  }
}

@media (min-width: 769px) {
  .mobile-nav {
    display: none;
  }
}

/* Print */
@media print {
  .sidebar, .app-header, .mobile-nav {
    display: none;
  }

  .main-content {
    margin-left: 0;
  }

  .card, .content-section {
    break-inside: avoid;
  }
}