/* Responsive utility classes for Gradebook view modes */
.view-modes-mobile {
  display: none !important;
}

.view-modes-desktop {
  display: flex !important;
}

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

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

  .sidebar-overlay.show {
    display: block;
  }

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

  .menu-toggle-btn {
    display: inline-flex !important;
  }
}

/* Mobile Devices (<= 768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 58px;
  }

  .view-modes-desktop {
    display: none !important;
  }

  .view-modes-mobile {
    display: inline-flex !important;
  }

  .app-content {
    padding: var(--space-4);
    padding-bottom: 80px; /* Space for bottom nav or sticky bars */
  }

  .app-header {
    padding: 0 var(--space-4);
  }

  .page-title-wrap h1 {
    font-size: 1.15rem;
  }

  .header-right .btn-text-hide {
    display: none;
  }

  /* Form & Actions */
  .form-row {
    grid-template-columns: 1fr;
  }

  .card-header {
    padding: var(--space-3) var(--space-4);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .card-body {
    padding: var(--space-4);
  }

  /* Gradebook Mobile Optimizations */
  .gradebook-toolbar {
    padding: var(--space-3);
  }

  .toolbar-top {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-actions {
    justify-content: space-between;
    width: 100%;
  }

  .column-navigator-bar {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
  }

  .col-nav-btn {
    padding: 0.45rem 0.65rem;
    font-size: 0.8rem;
  }

  .column-select-wrapper select {
    font-size: 0.95rem;
    padding: 0.45rem 0.75rem;
  }

  .grade-filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .grade-search-input {
    width: 100%;
  }

  .grade-status-tabs {
    width: 100%;
  }

  .status-tab-btn {
    flex: 1;
    text-align: center;
  }

  /* Sticky Bottom Bar on Mobile */
  .grade-bottom-bar {
    padding: 0.65rem var(--space-3);
    gap: var(--space-2);
  }

  .current-col-pill {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
  }

  .grading-progress-badge {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
  }

  .auto-save-indicator {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
  }

  /* Single column table layout adjustments */
  .grade-table th, .grade-table td {
    padding: 0.65rem 0.75rem;
  }

  .grade-input {
    width: 78px;
    height: 42px;
    font-size: 1.1rem;
  }
}

/* Small SmartPhones (<= 430px) */
@media (max-width: 430px) {
  .brand-text {
    font-size: 1rem;
  }

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

  .btn-responsive-full {
    width: 100%;
  }

  .modal-dialog {
    margin: var(--space-2);
    max-height: 95vh;
  }

  .modal-header, .modal-body, .modal-footer {
    padding: var(--space-4);
  }

  .grade-bottom-bar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .bottom-bar-left {
    width: 100%;
    justify-content: space-between;
  }

  .bottom-bar-center, .bottom-bar-right {
    font-size: 0.75rem;
  }
}