@media (min-width: 561px) {
  .detail-report-table th:first-child,
  .detail-report-table td:first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    min-width: 116px;
    background: #fff;
    box-shadow: 1px 0 0 var(--line);
  }

  .detail-report-table th:first-child {
    z-index: 4;
    background: #fafafa;
  }
}

@media (min-width: 801px) and (max-width: 1480px) {
  .main-view {
    grid-template-columns: 208px 1fr;
  }

  .sidebar {
    padding: 14px 12px;
  }

  .brand {
    gap: 10px;
    height: 40px;
    margin-bottom: 18px;
    font-size: 15px;
  }

  .brand span {
    font-size: 18px;
  }

  .tab {
    grid-template-columns: 26px 1fr;
    gap: 7px 9px;
    min-height: 44px;
    padding: 6px 8px;
    font-size: 13px;
  }

  .tab span {
    width: 26px;
    height: 26px;
  }

  .tab small {
    font-size: 10px;
  }

  .content-shell {
    max-width: none;
    padding: 0 16px 28px;
  }

  .topbar {
    gap: 14px;
    min-height: 58px;
    margin: 0 -16px 18px;
    padding: max(9px, var(--safe-top)) 16px 9px;
  }

  h1 {
    font-size: 25px;
  }

  h2 {
    font-size: 19px;
  }

  .topbar-right {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px 10px;
  }

  .workflow-actions {
    max-width: min(620px, 52vw);
    gap: 6px;
  }

  .workflow-actions button {
    min-height: 34px;
    padding: 0 9px;
    font-size: 12px;
  }

  .workflow-actions button strong {
    min-width: 20px;
    height: 20px;
    font-size: 11px;
  }

  .user-chip {
    gap: 6px;
  }

  .user-chip span {
    padding: 7px 10px;
    font-size: 12px;
  }

  .user-chip button {
    min-height: 34px;
    padding: 0 11px;
    font-size: 12px;
  }

  .controls {
    gap: 10px;
    margin-bottom: 14px;
    padding: 12px;
  }

  .filter-group {
    grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
    gap: 10px;
  }

  .main-filters {
    grid-template-columns:
      minmax(128px, 0.9fr)
      minmax(148px, 1.1fr)
      minmax(128px, 0.9fr)
      minmax(118px, 0.8fr)
      minmax(138px, 0.9fr)
      minmax(170px, 1fr);
  }

  .main-filters .range-hint {
    min-height: 36px;
  }

  .controls input,
  .controls select {
    min-height: 38px;
  }

  .quick-actions button,
  .filter-chip,
  .view-status-actions .ghost-button {
    min-height: 32px;
    font-size: 12px;
  }

  .kpis {
    gap: 10px;
  }

  .kpis article {
    min-height: 104px;
    padding: 18px;
  }

  .kpis strong {
    margin: 12px 0 3px;
    font-size: 25px;
  }

  .insight-strip {
    grid-template-columns: repeat(4, minmax(128px, 1fr));
    gap: 10px;
  }

  .insight-card {
    min-height: 94px;
    padding: 15px;
  }

  .insight-card strong {
    font-size: 19px;
  }

  .schedule-board-header {
    gap: 14px 16px;
    padding: 16px 18px;
  }

  .schedule-title {
    padding: 12px 14px;
  }

  .schedule-title h2 {
    font-size: 22px;
  }

  .schedule-actions {
    min-width: 318px;
    padding: 9px;
  }

  .export-tools {
    grid-template-columns: repeat(2, minmax(112px, 1fr));
    gap: 7px;
  }

  .export-tools .primary-button,
  .export-tools .ghost-button {
    min-height: 38px;
    padding: 0 12px;
    font-size: 13px;
  }

  .view-tools {
    gap: 8px;
    padding: 10px;
  }

  .view-mode-label {
    font-size: 13px;
  }

  .segmented {
    width: 100%;
    grid-template-columns: minmax(320px, 1.18fr) minmax(210px, 0.76fr) minmax(230px, 0.78fr);
    gap: 7px;
    padding: 7px;
  }

  .view-mode-group {
    gap: 6px;
    padding: 6px;
  }

  .view-mode-group > span {
    font-size: 12px;
  }

  .view-mode-group > div {
    gap: 6px;
    grid-template-columns: repeat(auto-fit, minmax(82px, 1fr));
  }

  .view-toggle {
    min-height: 48px;
    padding: 10px 32px 9px 12px;
    font-size: 15px;
  }

  .view-toggle.has-badge {
    padding-right: 36px;
  }

  .view-toggle.has-badge::after {
    top: 7px;
    right: 8px;
    min-width: 19px;
    height: 19px;
    font-size: 10px;
    line-height: 19px;
  }

  .view-info-panel {
    gap: 8px;
  }

  .calendar-view {
    grid-template-columns: repeat(7, minmax(96px, 136px));
    gap: 6px;
    max-width: 1040px;
    padding: 16px 18px;
  }

  .calendar-day {
    min-height: 128px;
    gap: 7px;
    padding: 8px;
  }

  .calendar-weekday {
    padding: 8px;
    font-size: 12px;
  }

  .calendar-course {
    padding: 7px 8px;
    font-size: 12px;
  }

  .schedule-list,
  .week-view,
  .timeline-view,
  .subject-view,
  .teacher-view,
  .status-view,
  .institution-view {
    padding: 16px 18px 18px;
  }

  .week-grid {
    grid-template-columns: repeat(7, minmax(96px, 1fr));
    gap: 6px;
    padding: 10px;
  }

  .week-day {
    min-height: 150px;
    padding: 8px;
  }

  .timeline-day {
    grid-template-columns: 94px minmax(0, 1fr);
    gap: 10px;
  }

  .timeline-date {
    padding: 10px;
  }

  .timeline-date strong {
    font-size: 17px;
  }

  .timeline-item {
    grid-template-columns: 76px minmax(0, 1fr) auto;
    gap: 10px;
    padding: 10px 12px;
  }

  .institution-course,
  .subject-course,
  .teacher-course,
  .status-course {
    grid-template-columns: minmax(0, 1fr) 104px minmax(88px, 112px);
    gap: 10px;
    padding: 10px;
  }

  .status-course {
    padding-right: 14px;
  }

  .home-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 14px;
  }

  .split-layout {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 14px;
  }

  .settlement-layout {
    grid-template-columns: minmax(340px, 0.9fr) minmax(380px, 1.1fr);
    gap: 14px;
  }

  .settlement-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    padding: 0 18px 18px;
  }

  .package-card-list,
  #lessonPackageList.table-wrap {
    margin: 0 14px 16px;
  }

  .package-card {
    padding: 12px;
  }

  .package-metrics em,
  .settlement-overview-metric strong {
    font-size: 16px;
  }

  .analytics-grid,
  .stats-analysis-grid {
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: 14px;
  }

  .analysis-kpis {
    grid-template-columns: repeat(4, minmax(120px, 1fr));
    gap: 10px;
  }

  .stats-analysis-board {
    padding: 18px;
  }

  .workspace {
    grid-template-columns: 290px minmax(360px, 1fr) 280px;
    gap: 14px;
  }

  .board {
    min-height: auto;
  }

  .board-header {
    padding: 17px 18px;
  }

  .panel-card {
    padding: 18px;
  }

  .table-wrap table,
  table {
    font-size: 14px;
  }

  th,
  td {
    padding: 12px 10px;
  }

  .detail-report-table th:first-child,
  .detail-report-table td:first-child {
    min-width: 104px;
  }
}

@media (min-width: 801px) and (max-width: 1280px) {
  .workflow-actions {
    max-width: min(620px, 52vw);
  }

  .main-filters {
    grid-template-columns: repeat(3, minmax(130px, 1fr));
  }

  .main-filters .range-hint {
    grid-column: span 1;
  }

  .segmented {
    grid-template-columns: minmax(300px, 1.25fr) minmax(270px, 0.95fr) minmax(210px, 0.72fr);
  }

  .view-toggle {
    min-height: 46px;
    font-size: 14px;
  }

  .calendar-view {
    grid-template-columns: repeat(7, minmax(90px, 126px));
    max-width: 960px;
  }

  .calendar-day {
    min-height: 118px;
  }

  .settlement-layout,
  .split-layout,
  .home-layout {
    grid-template-columns: 1fr;
  }

  .settlement-layout {
    grid-template-areas:
      "overview"
      "packages"
      "details";
  }

  .insight-strip {
    grid-template-columns: repeat(2, minmax(180px, 1fr));
  }

  .workspace {
    grid-template-columns: 280px minmax(0, 1fr);
  }
}

@media (min-width: 1181px) and (max-width: 1512px) {
  .main-view {
    grid-template-columns: 208px minmax(0, 1fr);
  }

  .sidebar {
    padding: 14px;
  }

  .content-shell {
    max-width: none;
    padding: 0 16px 28px;
  }

  .topbar {
    min-height: 56px;
    margin: 0 -16px 16px;
    padding: max(8px, var(--safe-top)) 16px 8px;
  }

  .brand {
    gap: 12px;
    margin-bottom: 18px;
    font-size: 16px;
  }

  .tab {
    grid-template-columns: 34px 1fr;
    gap: 10px;
    min-height: 56px;
    padding: 9px 10px;
  }

  .tab span {
    width: 34px;
    height: 34px;
  }

  .tab strong {
    font-size: 13px;
  }

  .tab small {
    font-size: 11px;
  }

  .controls {
    margin-bottom: 14px;
    padding: 12px;
  }

  .main-filters {
    grid-template-columns:
      minmax(112px, 0.78fr)
      minmax(142px, 1fr)
      minmax(112px, 0.8fr)
      minmax(112px, 0.72fr)
      minmax(126px, 0.86fr)
      minmax(168px, 1fr);
    gap: 10px;
  }

  .range-hint {
    min-height: 36px;
    line-height: 1.4;
  }

  .kpis article,
  .panel-card {
    padding: 16px;
  }

  .board-header,
  .schedule-board-header {
    padding: 15px 16px;
  }

  .schedule-title {
    padding: 10px 12px;
  }

  .schedule-title h2 {
    font-size: 21px;
  }

  .segmented {
    grid-template-columns: minmax(260px, 1.05fr) minmax(190px, 0.76fr) minmax(190px, 0.7fr);
  }

  .week-view,
  .timeline-view,
  .subject-view,
  .teacher-view,
  .institution-view,
  .status-view,
  .schedule-list {
    padding: 14px 16px 18px;
  }

  .week-grid {
    grid-template-columns: repeat(7, minmax(92px, 1fr));
    gap: 6px;
    padding: 10px;
  }

  .week-day {
    min-height: 136px;
    padding: 8px;
  }

  .week-course strong,
  .week-course small {
    white-space: normal;
  }

  .calendar-view {
    grid-template-columns: repeat(7, minmax(92px, 132px));
    gap: 6px;
    max-width: 1000px;
    padding: 14px 16px;
  }

  .calendar-day {
    min-height: 122px;
    padding: 8px;
  }

  .calendar-course,
  .calendar-block {
    padding: 7px 8px;
    line-height: 1.35;
  }

  .timeline-day {
    grid-template-columns: 92px minmax(0, 1fr);
  }

  .timeline-item {
    grid-template-columns: 76px minmax(0, 1fr) auto;
    padding: 10px 12px;
  }

  .course-card {
    grid-template-columns: 76px minmax(0, 1fr) minmax(190px, auto);
    gap: 10px;
    padding: 12px;
  }

  .course-main strong {
    font-size: 15px;
  }

  .institution-course,
  .subject-course,
  .teacher-course,
  .status-course {
    grid-template-columns: minmax(0, 1fr) 108px minmax(88px, 116px);
    gap: 10px;
    padding: 10px;
  }

  .status-course {
    padding-right: 14px;
  }

  .table-wrap table,
  table {
    font-size: 13px;
  }

  th,
  td {
    padding: 10px 9px;
  }

  .ledger-row {
    grid-template-columns: 76px minmax(220px, 1fr) 78px minmax(220px, auto);
    gap: 10px;
    padding: 10px;
  }

  .ledger-main small {
    white-space: normal;
    line-height: 1.35;
  }
}

@media (min-width: 700px) and (max-width: 800px) {
  .modal {
    align-items: center;
    padding: max(18px, var(--safe-top)) 18px max(18px, var(--safe-bottom));
  }

  .modal-card {
    max-width: min(680px, 100%);
    max-height: calc(100dvh - 48px - var(--safe-top) - var(--safe-bottom));
    border-radius: 16px;
    padding: 20px;
  }

  .package-modal-card {
    max-width: min(720px, 100%);
  }

  .modal-actions {
    margin: 2px -20px -20px;
    padding-left: 20px;
    padding-right: 20px;
  }

  .content-shell {
    max-width: 780px;
    margin-inline: auto;
    padding: 0 18px calc(98px + var(--safe-bottom));
  }

  .topbar {
    margin: 0 -18px 14px;
    padding-left: 18px;
    padding-right: 18px;
  }

  .sidebar {
    left: 50%;
    width: min(760px, 100%);
    border-radius: 16px 16px 0 0;
    transform: translateX(-50%);
  }

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

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

  .user-chip #roleLabel {
    grid-column: auto;
  }

  .main-filters,
  .filter-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .main-filters .range-hint {
    grid-column: span 1;
  }

  .kpis,
  .finance-grid,
  .package-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .insight-strip,
  .analytics-grid,
  .stats-analysis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calendar-view,
  .week-grid {
    grid-template-columns: repeat(7, minmax(82px, 1fr));
    gap: 6px;
  }

  .calendar-day,
  .week-day {
    min-height: 122px;
  }

  .segmented {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .view-mode-group > div {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .admin-layout,
  .master-grid,
  .analytics-table-grid,
  .stats-analysis-grid,
  .action-row,
  .availability-row,
  .reference-row,
  .child-merge-tool {
    grid-template-columns: 1fr;
  }

  .backup-actions,
  .maintenance-grid,
  .field-choice-grid,
  .field-order-list,
  .smart-insight-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .action-row .mini-button,
  .availability-row .mini-button {
    width: 100%;
  }

  .monthly-frequency-card header,
  .explanation-row header {
    grid-template-columns: minmax(0, 1fr);
  }

  .monthly-frequency-card em,
  .explanation-row em {
    justify-self: start;
    white-space: normal;
  }

  .field-settings-head,
  .field-order-head,
  .package-card header,
  .package-card footer,
  .package-list-summary {
    align-items: stretch;
    flex-direction: column;
  }

  .field-settings-head > div,
  .field-mode-actions,
  .field-bulk-actions,
  .package-actions,
  .package-actions-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .field-settings-head button,
  .field-mode-actions button,
  .field-bulk-actions button,
  .package-actions button {
    width: 100%;
  }

  .package-filter-bar,
  .shared-package-row {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 801px) and (max-width: 1180px) {
  .modal-card {
    max-width: min(720px, calc(100vw - 44px));
  }

  .package-modal-card {
    max-width: min(780px, calc(100vw - 44px));
  }

  .main-view {
    grid-template-columns: 188px minmax(0, 1fr);
  }

  .content-shell {
    max-width: 1060px;
    padding: 0 14px 28px;
  }

  .topbar {
    margin: 0 -14px 14px;
    padding-left: 14px;
    padding-right: 14px;
  }

  .workflow-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: min(540px, 52vw);
  }

  .workflow-actions button {
    justify-content: center;
  }

  .user-chip {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 8px;
  }

  .user-chip span,
  .user-chip button {
    min-width: 0;
  }

  .main-filters,
  .filter-group {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .import-result-bar,
  .view-status-bar {
    grid-template-columns: minmax(0, 1fr);
  }

  .view-status-actions {
    grid-auto-flow: row !important;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    min-width: 0 !important;
    width: 100%;
  }

  .view-status-actions .ghost-button {
    width: 100%;
    min-width: 0;
  }

  .main-filters .range-hint {
    grid-column: span 1;
  }

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

  .insight-strip,
  .analytics-grid,
  .stats-analysis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .schedule-board-header,
  .view-tools,
  .controls,
  .board,
  .panel-card {
    max-width: 100%;
  }

  .segmented {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .view-mode-group > div {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .calendar-view,
  .week-grid {
    grid-template-columns: repeat(7, minmax(86px, 1fr));
    max-width: none;
    width: 100%;
  }

  .calendar-day,
  .week-day {
    min-height: 120px;
  }

  .settlement-layout,
  .split-layout,
  .home-layout {
    grid-template-columns: 1fr;
  }

  .admin-layout,
  .master-grid,
  .analytics-table-grid,
  .stats-analysis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .action-row,
  .availability-row,
  .reference-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .action-row .mini-button,
  .availability-row .mini-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .smart-insight-list,
  .field-order-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .monthly-frequency-card header,
  .explanation-row header {
    grid-template-columns: minmax(0, 1fr);
  }

  .monthly-frequency-card em,
  .explanation-row em {
    justify-self: start;
    white-space: normal;
  }

  .field-settings-head,
  .field-order-head {
    align-items: stretch;
    flex-direction: column;
  }

  .field-settings-head > div,
  .field-mode-actions,
  .field-bulk-actions {
    justify-content: stretch;
  }

  .field-settings-head button,
  .field-mode-actions button,
  .field-bulk-actions button {
    flex: 1 1 120px;
  }

  .package-filter-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .shared-package-row {
    grid-template-columns: minmax(0, 1fr) minmax(96px, 0.8fr) minmax(96px, 0.8fr);
  }
}

@media (min-width: 1181px) and (max-width: 1512px) {
  .modal-card {
    max-width: min(720px, calc(100vw - 48px));
  }

  .package-modal-card {
    max-width: min(820px, calc(100vw - 48px));
  }

  .content-shell {
    max-width: min(1280px, calc(100vw - 228px));
    margin-inline: auto;
  }

  .topbar {
    border-radius: 0;
  }

  .topbar-right {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, auto);
    align-items: center;
    gap: 10px;
    width: min(920px, 68vw);
  }

  .workflow-actions {
    display: grid;
    grid-template-columns: repeat(4, minmax(92px, 1fr));
    max-width: min(680px, 54vw);
    justify-self: end;
    width: 100%;
  }

  .workflow-actions button {
    justify-content: center;
    min-width: 0;
    padding-left: 9px;
    padding-right: 9px;
  }

  .user-chip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, auto));
    justify-content: end;
    gap: 8px;
  }

  .user-chip span,
  .user-chip button {
    min-width: 0;
  }

  .user-chip span {
    max-width: 190px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .main-filters {
    grid-template-columns:
      minmax(126px, 0.82fr)
      minmax(150px, 1fr)
      minmax(126px, 0.82fr)
      minmax(118px, 0.74fr)
      minmax(136px, 0.86fr)
      minmax(178px, 1.04fr);
  }

  .view-status-actions {
    grid-auto-flow: row !important;
    grid-template-columns: repeat(3, minmax(0, max-content));
  }

  .kpis,
  .analysis-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .calendar-view,
  .week-grid {
    max-width: none;
    width: 100%;
  }

  .calendar-view {
    grid-template-columns: repeat(7, minmax(102px, 1fr));
  }

  .week-grid {
    grid-template-columns: repeat(7, minmax(102px, 1fr));
  }

  .admin-layout {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }

  .analytics-table-grid,
  .stats-analysis-grid {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }

  .action-row {
    grid-template-columns: minmax(180px, 1fr) 112px auto;
  }

  .report-header-actions,
  .field-settings-head > div,
  .field-mode-actions,
  .field-bulk-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(108px, max-content));
    justify-content: end;
    gap: 8px;
  }

  .field-settings-head {
    align-items: start;
  }

  .field-order-list,
  .smart-insight-list {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  }

  .view-toggle {
    min-height: 46px;
    padding-left: 12px;
    padding-right: 32px;
    font-size: 14px;
  }

  .monthly-frequency-card header,
  .explanation-row header {
    grid-template-columns: minmax(0, 1fr) minmax(72px, auto);
  }

  .visual-dashboard-grid {
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    padding: 18px;
  }

  .subject-treemap {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}