@media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }

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

      .grid-5, .grid-6 {
        grid-template-columns: repeat(3, 1fr);
      }

      .toppers-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .subscription-plan-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 768px) {
      .sidebar {
        position: fixed;
        left: min(-280px, -82vw);
        top: 0;
        bottom: 0;
        width: min(280px, 82vw);
        z-index: 1200;
        transition: left 0.3s ease;
      }

      .sidebar.mobile-open {
        left: 0;
      }

      .sidebar.mobile-open+.main .mobile-bottom-nav {
        opacity: 0;
        pointer-events: none;
        transform: translateY(12px);
      }

      .app {
        flex-direction: column;
      }

      .topbar {
        padding: 12px 16px;
      }

      .topbar-right {
        gap: 8px;
      }

      .topbar-right .notif-btn {
        padding: 6px 8px;
      }

      .topbar-right .topbar-user {
        display: none;
      }

      .content {
        padding: 16px;
        padding-bottom: calc(96px + env(safe-area-inset-bottom, 0px));
      }

      .grid-2,
      .grid-3,
      .grid-4,
      .grid-5,
      .grid-6,
      .subscription-plan-grid,
      .stack-mobile {
        grid-template-columns: 1fr !important;
      }

      .card,
      .stat-card {
        padding: 14px;
      }

      .hide-mobile {
        display: none !important;
      }

      .mobile-only {
        display: block;
      }

      .room-grid {
        grid-template-columns: repeat(5, 1fr);
      }

      .mobile-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 44px !important;
        height: 44px !important;
        background: #f1f5f9;
        border-radius: 10px;
        cursor: pointer;
        margin-right: 12px;
        box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      }

      .mobile-toggle svg {
        width: 24px !important;
        height: 24px !important;
      }

      .topbar-right .notif-btn {
        padding: 8px 14px !important;
        font-size: 13px !important;
        min-height: 40px !important;
        border-radius: 10px !important;
      }

      .topbar-right .avatar {
        width: 40px !important;
        height: 40px !important;
        border-radius: 10px !important;
      }

      .modal {
        width: 100%;
        max-width: 100%;
        padding: 16px;
        max-height: calc(100vh - 24px);
        overflow-y: auto;
        border-radius: 12px;
      }

      .modal-overlay {
        padding: 12px;
      }

      .modal-title {
        position: sticky;
        top: 0;
        z-index: 2;
        background: #fff;
        margin-bottom: 14px;
        padding-bottom: 8px;
      }

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

      .analysis-switch {
        width: 100%;
        justify-content: space-between;
      }

      .analysis-switch button {
        flex: 1;
        text-align: center;
      }

      .donut-shell {
        width: 160px;
        height: 160px;
      }

      .donut-hole {
        inset: 28px;
      }

      .section-header {
        flex-direction: column;
        align-items: stretch;
      }

      .section-header>div:last-child {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
      }

      .section-header>div:last-child .btn {
        flex: 1 1 140px;
        justify-content: center;
      }

      .student-id-body {
        align-items: flex-start;
      }

      .topbar-title {
        font-size: 16px;
        max-width: 58vw;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .back-btn {
        display: none !important;
      }

      .room-map-shell {
        min-height: 420px !important;
      }

      .room-map-frame {
        height: min(68vh, 560px);
      }

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

      .room-map-zoom-buttons {
        justify-content: space-between;
      }

      .room-map-zoom-btn {
        flex: 1 1 0;
      }

      .room-map-zoom-label {
        min-width: 0;
      }

      /* Prevent horizontal overflow from desktop-biased inline min-width styles */
      .content [style*="min-width"] {
        min-width: 0 !important;
      }

      .content select,
      .content input,
      .content textarea,
      .content button {
        max-width: 100%;
      }

      .content .card {
        overflow-x: auto;
      }

      /* Stack inline display grid elements on mobile to prevent overlapping/clipping */
      #content div[style*="grid-template-columns:1fr 1fr"],
      #content div[style*="grid-template-columns: 1fr 1fr"],
      #content div[style*="grid-template-columns:repeat(3"],
      #content div[style*="grid-template-columns:repeat(3,"],
      .modal-overlay div[style*="grid-template-columns:1fr 1fr"],
      .modal-overlay div[style*="grid-template-columns: 1fr 1fr"],
      .login-card div[style*="grid-template-columns:1fr 1fr"],
      .login-card div[style*="grid-template-columns: 1fr 1fr"],
      .login-card div[style*="grid-template-columns:repeat(3"] {
        grid-template-columns: 1fr !important;
      }

      .input-row > * {
        flex: 1 1 100%;
        min-width: 0;
      }

      .filter-grid-2,
      .filter-grid-3,
      .filter-grid-4 {
        grid-template-columns: 1fr !important;
      }

      .new-admissions-stats {
        grid-template-columns: 1fr !important;
      }

      .new-admissions-row {
        flex-direction: column;
        align-items: flex-start;
      }

      .new-admissions-meta {
        white-space: normal;
      }

      .table-scroll>table,
      .auto-table-scroll>table,
      .content .card>table {
        min-width: 640px;
      }

      .mobile-bottom-nav {
        position: fixed;
        left: 12px;
        right: 12px;
        bottom: calc(10px + env(safe-area-inset-bottom, 0px));
        z-index: 1100;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        align-items: center;
        height: 64px;
        padding: 8px 10px;
        border-radius: 18px;
        border: 1px solid #111827;
        background: #000;
        box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
        transition: opacity 0.2s ease, transform 0.2s ease;
      }
    }

    @media (max-width: 480px) {
      .content {
        padding: 12px;
        padding-bottom: calc(94px + env(safe-area-inset-bottom, 0px));
      }

      .topbar {
        padding: 10px 12px;
      }

      .login-card {
        padding: 24px 16px;
        margin: 0 10px;
      }

      .section-title {
        font-size: 16px;
      }

      .room-map-shell {
        min-height: 360px !important;
      }

      .room-map-frame {
        height: min(62vh, 500px);
      }

      .table-scroll>table,
      .auto-table-scroll>table,
      .content .card>table {
        min-width: 560px;
      }

      .mobile-bottom-nav {
        left: 10px;
        right: 10px;
        height: 62px;
      }
    }

    .mobile-toggle {
      display: none;
    }

    .sidebar-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 999;
    }

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

    .notif-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .notif-item {
      transition: var(--transition);
    }

    .notif-item:hover {
      transform: translateX(4px);
    }

    /* Data Preview Styles */
    .preview-wrapper {
      margin-top: 24px;
      animation: slideUp 0.4s ease;
    }

    .preview-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      flex-wrap: wrap;
      gap: 12px;
    }

    .table-scroll {
      overflow-x: auto;
      background: #fff;
      border-radius: 12px;
      border: 1px solid var(--border);
      -webkit-overflow-scrolling: touch;
    }

    .auto-table-scroll {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    .preview-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
    }

    .preview-table th {
      background: #f8fafc;
      padding: 12px 16px;
      text-align: left;
      font-weight: 600;
      color: var(--muted);
      border-bottom: 1px solid var(--border);
      white-space: nowrap;
    }

    .preview-table td {
      padding: 12px 16px;
      border-bottom: 1px solid #f1f5f9;
      white-space: nowrap;
    }

    .preview-table tr:last-child td {
      border-bottom: none;
    }
/* Global API activity and offline feedback */
.global-api-loader {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.24);
  z-index: 11000;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.global-api-loader-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #ffffff;
  border-radius: 10px;
  padding: 10px 14px;
  box-shadow: 0 10px 26px rgba(2, 6, 23, 0.18);
  color: #0f172a;
  font-size: 13px;
  font-weight: 600;
}

.offline-banner {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 12000;
  background: #b91c1c;
  color: #fff;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(185, 28, 28, 0.35);
}

.skeleton-block,
.skeleton-pill {
  position: relative;
  overflow: hidden;
  background: #e2e8f0;
  border-radius: 8px;
}

.skeleton-pill {
  width: 56px;
  height: 10px;
}

.skeleton-block::after,
.skeleton-pill::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
  animation: skeletonShimmer 1.2s infinite;
}

@keyframes skeletonShimmer {
  100% { transform: translateX(100%); }
}