@media (max-width: 900px) {
  .app-shell {
    grid-template-rows: auto 1fr;
  }

  .app-header {
    min-height: 62px;
    padding: max(10px, env(safe-area-inset-top)) 14px 10px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  h1 {
    font-size: 17px;
  }

  h2 {
    font-size: 21px;
  }

  .brand-block p {
    display: none;
  }

  .header-actions {
    gap: 6px;
  }

  .user-chip {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .module-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    height: calc(62px + env(safe-area-inset-bottom));
    z-index: 60;
    padding: 0 6px env(safe-area-inset-bottom);
    justify-content: space-around;
    border-top: 1px solid var(--line);
    border-bottom: 0;
    background: rgba(255, 255, 255, 0.96);
  }

  .nav-item {
    min-height: 62px;
    flex: 1;
    flex-direction: column;
    justify-content: center;
    gap: 3px;
    padding: 0 4px;
    font-size: 12px;
    border-bottom: 0;
    border-top: 3px solid transparent;
    border-radius: 14px 14px 0 0;
  }

  .nav-item.active {
    border-top-color: var(--primary);
    border-bottom-color: transparent;
  }

  .content-shell {
    padding: 14px 12px calc(86px + env(safe-area-inset-bottom));
  }

  .nav-icon {
    font-size: 17px;
  }

  .page-head > div:first-child {
    min-width: 0;
  }

  .page-head h2 {
    font-size: 20px;
  }

  .page-head p,
  .section-title span,
  .sub {
    font-size: 12px;
  }

  .page-head,
  .section-title,
  .progress-row,
  .product-card-head,
  .assignment-head,
  .page-actions {
    align-items: stretch;
    flex-direction: column;
  }

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

  .toolbar {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px;
  }

  .sales-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .quote-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .sales-toolbar .search-field {
    grid-column: 1 / -1;
  }

  .quote-toolbar .search-field {
    grid-column: 1 / -1;
  }

  .sales-view-field {
    grid-column: 1 / -1;
  }

  #quotePagination .formulation-pagination-inner {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  #quotePagination .formulation-pagination-actions {
    width: 100%;
    justify-content: stretch;
    flex-wrap: wrap;
  }

  #quotePagination .formulation-pagination-actions .btn,
  #quotePagination .exchange-page-size-field {
    flex: 1 1 0;
  }

  .field,
  .field.compact,
  .detail-week-field,
  .toolbar .btn,
  .toolbar select,
  .toolbar input {
    width: 100%;
    min-width: 0;
  }

  .segmented {
    width: 100%;
    justify-content: stretch;
  }

  .segment {
    flex: 1;
  }

  .detail-summary {
    grid-template-columns: 1fr;
  }

  .detail-panel-body {
    padding: 0 12px 12px;
  }

  .sales-snapshot {
    grid-template-columns: 1fr;
  }

  .purchase-import-grid {
    grid-template-columns: 1fr;
  }

  .import-card-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .import-card-actions .btn {
    width: 100%;
  }

  .purchase-task-grid {
    grid-template-columns: 1fr;
  }

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

  .calendar-week-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .sales-matrix-wrap {
    max-height: calc(100vh - 230px);
  }

  .sales-search-meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .sales-card-mobile .sales-card-foot {
    align-items: stretch;
    flex-direction: column;
  }

  .costs-shell {
    grid-template-columns: 1fr;
  }

  .cost-list-panel {
    position: static;
    max-height: none;
  }

  .cost-product-list {
    max-height: none;
    overflow: visible;
    padding: 12px;
  }

  .formulation-calc-grid,
  .formulation-admin-grid,
  .formulation-admin-columns {
    grid-template-columns: 1fr 1fr;
  }

  .formulation-master-modal-grid {
    grid-template-columns: 1fr 1fr;
  }

  .profile-editor-grid,
  .formulation-master-form {
    grid-template-columns: 1fr 1fr;
  }

  .profile-editor-grid-top,
  .profile-editor-grid-mid,
  .profile-editor-grid-bottom {
    grid-template-columns: 1fr 1fr;
  }

  .cost-product-card-history,
  .cost-history-body,
  .cost-summary-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cost-profile-list {
    grid-template-columns: 1fr;
  }

  .formulation-profile-card-actions,
  .formulation-profile-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .formulation-profile-card-actions .btn,
  .formulation-profile-actions .btn {
    width: 100%;
  }

  .formulation-modal-panel {
    width: min(100%, calc(100vw - 20px));
  }

  .cost-summary-card-wide {
    grid-column: span 2;
  }

  .purchase-task-foot {
    align-items: stretch;
    flex-direction: column;
  }

  .purchase-task-actions {
    width: 100%;
  }

  .purchase-task-actions .btn {
    flex: 1 1 auto;
  }

  .price-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

  .cost-product-card {
    padding: 13px;
  }

  .cost-trend-svg {
    height: 214px;
  }

  .cost-range-toggle {
    width: 100%;
  }

  .analysis-auto-meta {
    grid-template-columns: 1fr;
  }

  .analysis-auto-card-wide {
    grid-column: span 1;
  }

  .analysis-form {
    grid-template-columns: 1fr;
  }

  .analysis-save-bar {
    position: sticky;
    bottom: 0;
    z-index: 3;
    border-top: 1px solid var(--line);
    box-shadow: 0 -8px 18px rgba(20, 32, 28, 0.06);
  }

  .analysis-periods,
  .analysis-selected-meta {
    grid-template-columns: 1fr;
  }

  .analysis-updates-head,
  .analysis-update-meta,
  .analysis-updates-detail-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .analysis-updates-workbench {
    grid-template-columns: 1fr;
    max-height: none;
  }

  .analysis-updates-date-rail {
    max-height: 180px;
  }

  .analysis-updates-detail-pane {
    min-height: 320px;
  }

  .analysis-period-toolbar {
    grid-template-columns: 1fr;
  }

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

  .assignment-selected-grid,
  .assignment-results-grid {
    grid-template-columns: 1fr;
  }

  .admin-form-row,
  .admin-form-grid {
    grid-template-columns: 1fr;
  }

  .role-filter-grid .page-actions,
  .admin-form-row .page-actions,
  .product-crud-actions .page-actions {
    width: 100%;
  }

  .role-filter-grid .page-actions .btn,
  .admin-form-row .page-actions .btn,
  .product-crud-actions .page-actions .btn {
    flex: 1 1 auto;
  }

  .admin-page-actions {
    width: 100%;
  }

  .admin-page-actions .btn {
    flex: 1;
  }

  .formulation-option-item,
  .formulation-pagination-inner,
  .formulation-master-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .formulation-option-side,
  .formulation-option-actions,
  .formulation-pagination-actions {
    justify-items: stretch;
    justify-content: stretch;
  }

  .formulation-option-actions .btn,
  .formulation-pagination-actions .btn {
    width: 100%;
  }

  .field.compact {
    min-width: 0;
  }

  .table-wrap {
    margin: 0 -1px;
  }

  table {
    min-width: 760px;
  }

  .header-actions .btn {
    min-height: 32px;
    padding: 6px 9px;
    font-size: 13px;
  }

  .login-card {
    width: min(480px, 100%);
    border-radius: 20px;
  }
}

@media (max-width: 520px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .detail-summary-insights {
    grid-template-columns: 1fr;
  }

  .customs-overview-grid,
  .customs-insight-grid,
  .customs-product-grid,
  .customs-trend-metrics,
  .customs-detail-toolbar {
    grid-template-columns: 1fr;
  }

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

  .customs-product-panel-head {
    flex-direction: column;
  }

  .customs-detail-filter-count {
    white-space: normal;
  }

  .customs-detail-filter-actions {
    justify-items: stretch;
  }

  .customs-detail-filter-actions .btn {
    width: 100%;
  }

  .customs-chip-actions {
    width: 100%;
    align-items: stretch;
  }

  .customs-chip-actions .tag-filter-btn,
  .customs-chip-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .customs-entry-row {
    grid-template-columns: 1fr;
  }

  .customs-entry-action {
    width: 100%;
    min-height: 38px;
  }

  .customs-country-modal-importer-row {
    align-items: stretch;
    flex-direction: column;
  }

  .customs-modal-product-head,
  .customs-modal-record-body,
  .customs-modal-product-side,
  .customs-modal-record-head {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }

  .price-list {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .price-week-group-grid {
    grid-template-columns: 1fr;
  }

  .cost-product-card-history,
  .cost-history-body,
  .cost-summary-grid {
    grid-template-columns: 1fr;
  }

  .formulation-calc-grid,
  .formulation-admin-grid,
  .customs-config-grid,
  .procurement-sync-config-grid,
  .procurement-quote-modal-grid,
  .procurement-quote-compact-grid,
  .procurement-quote-card-grid,
  .procurement-quote-compare-grid,
  .customs-review-toolbar,
  .formulation-admin-columns,
  .profile-editor-grid,
  .formulation-master-form,
  .formulation-master-modal-grid,
  .profile-editor-grid-top,
  .profile-editor-grid-mid,
  .profile-editor-grid-bottom {
    grid-template-columns: 1fr;
  }

  .packaging-choice-list {
    grid-template-columns: 1fr;
    max-height: 220px;
  }

  .formulation-recommended-values {
    grid-template-columns: 1fr;
  }

  .procurement-quote-compact-item-wide {
    grid-column: auto;
  }

  .formulation-profile-card-head,
  .formulation-profile-card-meta,
  .formulation-profile-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .formulation-profile-card-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .formulation-calc-result {
    align-items: stretch;
  }

  .customs-review-summary {
    flex-direction: column;
    gap: 6px;
  }

  .customs-review-batch-bar,
  .customs-review-record-toggle {
    align-items: stretch;
    flex-direction: column;
  }

  .customs-review-actions {
    justify-content: stretch;
  }

  .customs-review-batch-bar .btn,
  .customs-review-actions .btn {
    width: 100%;
  }

  .formulation-result-main strong {
    font-size: 20px;
  }

  .cost-summary-card-wide {
    grid-column: span 1;
  }

  .price-list li {
    min-height: 0;
    padding: 12px;
  }

  .metric-value {
    font-size: 24px;
  }

  #triggerReminderBtn,
  #refreshBtn {
    display: none;
  }

  .app-header {
    align-items: flex-start;
  }

  .header-actions {
    max-width: 46%;
    display: grid;
    grid-auto-flow: row;
    justify-items: stretch;
  }

  .user-chip {
    max-width: 100%;
  }

  .page-head {
    gap: 10px;
    margin-bottom: 14px;
  }

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

  .calendar-day {
    min-height: 88px;
  }

  .section-block {
    border-radius: 16px;
  }

  .section-title,
  .calendar-panel,
  .admin-editor-shell,
  .sales-matrix-shell,
  .cost-history-list,
  .cost-chart-wrap,
  .cost-summary-grid,
  .formulation-calculator,
  .formulation-settings-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

  .product-card-head .btn,
  .drawer-actions .btn,
  .page-actions .btn {
    width: 100%;
  }

  .sales-view-toggle {
    min-height: 44px;
  }

  .sales-view-toggle .segment {
    min-height: 36px;
  }

  .page-actions {
    width: 100%;
  }

  .page-actions > * {
    width: 100%;
  }

  .table-wrap {
    overflow: visible;
  }

  .sales-matrix-wrap {
    overflow: auto;
  }

  .sales-matrix thead {
    display: table-header-group;
  }

  .sales-matrix tbody {
    display: table-row-group;
  }

  .sales-matrix tr {
    display: table-row;
    width: auto;
    padding: 0;
    border-bottom: 0;
  }

  .sales-matrix th,
  .sales-matrix td {
    display: table-cell;
    width: auto;
    padding: 10px 11px;
  }

  .sales-matrix td::before {
    content: none;
  }

  table {
    min-width: 0;
  }

  thead {
    display: none;
  }

  tbody,
  tr,
  td {
    display: block;
    width: 100%;
  }

  tr {
    border-bottom: 1px solid var(--line);
    padding: 10px 12px;
  }

  td {
    border-bottom: 0;
    padding: 7px 0;
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 10px;
    align-items: start;
  }

  td::before {
    content: attr(data-label);
    color: var(--muted);
    font-size: 12px;
  }

  td[colspan] {
    display: block;
  }

  td[colspan]::before {
    content: none;
  }

  .sales-matrix {
    min-width: 1180px;
  }

  .sales-matrix thead {
    display: table-header-group;
  }

  .sales-matrix tbody {
    display: table-row-group;
  }

  .sales-matrix tr {
    display: table-row;
    width: auto;
    padding: 0;
    border-bottom: 0;
  }

  .sales-matrix th,
  .sales-matrix td {
    display: table-cell;
    width: auto;
    padding: 10px 11px;
    border-bottom: 1px solid var(--line);
  }

  .sales-matrix td::before {
    content: none;
  }

  .sales-matrix .product-col {
    left: 0;
    width: 176px;
    min-width: 176px;
    max-width: 176px;
  }

  .sales-matrix .category-col {
    left: 176px;
    width: 184px;
    min-width: 184px;
    max-width: 184px;
  }

  .sales-matrix .trend-col {
    left: 360px;
    width: 162px;
    min-width: 162px;
    max-width: 162px;
  }

  .drawer-overlay {
    padding: 0;
  }

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

  .drawer-panel {
    border-radius: 22px 22px 0 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    width: 100%;
    max-height: 92dvh;
    padding: 16px 14px calc(16px + env(safe-area-inset-bottom));
  }

  .drawer-head {
    flex-direction: column;
  }

  .drawer-head .btn {
    width: 100%;
  }

  .sales-trend-modal-grid {
    grid-template-columns: 1fr;
  }

  .login-overlay {
    padding: 0;
  }

  .login-card.customs-runs-modal-panel,
  .login-card.customs-importer-modal-panel {
    width: 100%;
    max-width: 100%;
    min-height: 100dvh;
  }

  .customs-runs-modal-head,
  .customs-runs-main-head {
    flex-direction: column;
  }

  .customs-runs-main-actions,
  .customs-inline-resume,
  .customs-inline-resume-bar,
  .customs-inline-resume-manual {
    width: 100%;
    justify-content: flex-start;
    justify-items: stretch;
  }

  .customs-inline-resume-manual input,
  .customs-inline-resume-manual button,
  .customs-inline-resume > button {
    width: 100%;
  }

  .customs-runs-workbench-grid {
    grid-template-columns: 1fr;
  }

  .customs-runs-sidebar {
    grid-template-rows: auto auto;
  }

  .customs-runs-sidebar-list {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .customs-run-task-list,
  .customs-run-summary-inline,
  .customs-task-metrics-inline {
    gap: 6px;
  }

  .login-card {
    width: 100%;
    min-height: 100dvh;
    border-radius: 0;
    border: 0;
    padding: max(18px, env(safe-area-inset-top)) 16px calc(18px + env(safe-area-inset-bottom));
    box-shadow: none;
  }
}

@media (max-width: 900px) {
  #trendPagination .formulation-pagination-inner {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  #trendPagination .formulation-pagination-actions {
    width: 100%;
    justify-content: stretch;
    flex-wrap: wrap;
  }

  #trendPagination .formulation-pagination-actions .btn,
  #trendPagination .exchange-page-size-field {
    flex: 1 1 0;
  }

  #viewTrends .purchase-import-grid {
    grid-template-columns: 1fr;
  }
}