@media (max-width: 1200px) {
  .surface,
  .share-board {
    grid-template-columns: 1fr;
  }

  .share-side {
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,0.16);
  }
}

@media (max-width: 1024px) {
  .app-shell {
    padding: 16px;
  }

  .admin-value {
    font-size: 26px;
  }

  .mini-stat-value {
    font-size: 22px;
  }

  .admin-section-title {
    font-size: 26px;
  }

  .hero-strip {
    gap: 10px;
  }
}

@media (max-width: 980px) {
  .app-shell {
    min-height: 100vh;
    padding: 14px;
  }

  .workspace,
  .page-stack {
    min-height: 0;
  }

  .topbar,
  .toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar {
    min-height: auto;
    padding: 20px;
  }

  .header-right,
  .toolbar-right,
  .admin-toolbar-stack {
    width: 100%;
    justify-content: flex-start;
    align-items: stretch;
  }

  .header-actions,
  .admin-strip-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .search-box {
    width: 100%;
    min-width: 0;
  }

  .panel-header {
    padding: 20px 20px 10px;
  }

  .panel-body,
  .explorer-body,
  .admin-panel-scroll {
    padding: 0 20px 20px;
  }

  .explorer-body,
  .admin-panel-scroll {
    padding-top: 20px;
  }

  .hero-strip {
    grid-template-columns: 1fr;
  }

  .admin-card.span-4,
  .admin-card.span-6,
  .admin-card.span-8,
  .admin-card.span-12 {
    grid-column: span 12;
  }
}

@media (max-width: 768px) {
  .app-shell {
    padding: 12px;
  }

  .admin-grid {
    gap: 12px;
  }

  .admin-value {
    font-size: 22px;
  }

  .mini-stat-value {
    font-size: 20px;
  }

  .admin-section-title {
    font-size: 22px;
  }

  .admin-card {
    padding: 16px;
  }

  .admin-scroll-stack {
    gap: 14px;
  }

  .admin-section {
    gap: 14px;
  }
}

@media (max-width: 720px) {
  .brand-name {
    font-size: 22px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .header-actions .btn,
  .header-actions a.btn {
    width: auto;
    flex: 1 1 0;
  }

  .btn-row,
  .toolbar-left,
  .toolbar-right,
  .admin-toolbar-actions,
  .admin-toolbar-stack {
    width: 100%;
  }

  .crumbs,
  .status-bar,
  .admin-filter-bar {
    width: 100%;
  }

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

  .file-grid.is-list .item-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .details-drawer {
    top: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    border-radius: 0;
    border: 0;
    transform: translateX(100%);
  }

  .share-board {
    grid-template-columns: 1fr;
  }

  .share-side {
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,0.16);
  }
}

@media (max-width: 480px) {
  .app-shell {
    padding: 10px;
  }

  .topbar,
  .toolbar {
    padding: 14px;
  }

  .toolbar-btn,
  .toolbar-select {
    min-width: 0;
    min-height: 44px;
    padding: 0 14px;
    font-size: 14px;
  }

  .batch-bar,
  .admin-strip-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-strip {
    grid-template-columns: 1fr;
  }

  .modal-card {
    padding: 20px;
  }

  .preview-modal .btn-row {
    flex-wrap: wrap;
  }

  .share-main {
    padding: 16px;
  }

  .share-side {
    padding: 20px;
  }

  .item-card {
    padding: 14px;
  }

  .admin-section-title {
    font-size: 20px;
  }

  .admin-value {
    font-size: 20px;
  }

  .mini-stat-value {
    font-size: 18px;
  }

  .admin-section {
    gap: 12px;
  }

  .admin-card {
    padding: 14px;
  }
}