/* Optimal Trend - Maintenance History page CSS
   DP4 Wave 3 refactor 2026-05-24
   Depends on optimal-design-system.css for chassis tokens and primitives.
   No tree panel (director call C on methodology brief section 5.1).
   No off-palette colours outside the explicit chart-region exception
   declared inline at the chart-fill rules below. */

.ot-maint {
  min-height: calc(100vh - var(--topbar-h) - 48px);
  background: var(--white);
}

.ot-maint__content {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
  background: var(--white);
}

.ot-maint__stack {
  padding: 18px 24px 24px;
  display: grid;
  gap: 18px;
  min-width: 0;
}

/* Visually-hidden labels (sr-only convention) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* History import panel */
.ot-maint__import-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 16px;
  background: var(--teal-light);
  border: 1px solid var(--teal);
}

.ot-maint__import-copy {
  font-size: 12px;
  color: var(--navy);
  line-height: 1.5;
}

.ot-maint__import-copy strong {
  color: var(--navy-dark);
}

.ot-maint__import-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.ot-maint__import-actions input[type="file"] {
  font-size: 11px;
  color: var(--ink-3);
}

.ot-maint__import-status {
  font-size: 11px;
  color: var(--ink-4);
}

.ot-maint__btn-import {
  background: var(--navy);
  color: var(--white);
  border: 0;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.ot-maint__btn-import:hover {
  background: var(--navy-dark);
}

/* KPI strip */
.ot-maint__kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.ot-maint__kpi-card {
  background: var(--white);
  border: 1px solid var(--rule-light);
  padding: 14px 16px;
}

.ot-maint__kpi-label {
  font-size: 11px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 6px;
}

.ot-maint__kpi-value {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
}

.ot-maint__kpi-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 6px;
}

.ot-maint__kpi-badge--amber {
  background: var(--paper);
  color: var(--ink-2);
  border: 1px solid var(--rule);
}

/* Downtime split panel */
.ot-maint__downtime-split {
  background: var(--white);
  border: 1px solid var(--rule-light);
  padding: 16px 18px;
}

.ot-maint__downtime-split-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-light);
}

.ot-maint__downtime-split-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
}

.ot-maint__downtime-split-note {
  font-size: 11px;
  color: var(--ink-4);
  margin-top: 4px;
  line-height: 1.5;
}

.ot-maint__downtime-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ot-maint__downtime-controls select {
  height: 30px;
  padding: 0 8px;
  font-size: 12px;
  color: var(--ink-2);
  background: var(--white);
  border: 1px solid var(--rule);
}

.ot-maint__downtime-asset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.ot-maint__downtime-asset-card {
  background: var(--paper);
  border: 1px solid var(--rule-light);
  padding: 10px 12px;
}

.ot-maint__downtime-asset-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--navy);
}

.ot-maint__downtime-asset-sub {
  font-size: 10px;
  color: var(--ink-4);
  margin-top: 2px;
}

.ot-maint__downtime-asset-value {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-top: 4px;
}

.ot-maint__downtime-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
  margin-top: 12px;
}

.ot-maint__downtime-table th,
.ot-maint__downtime-table td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--rule-light);
  text-align: left;
  color: var(--ink-2);
}

.ot-maint__downtime-table th {
  background: var(--paper);
  color: var(--navy);
  font-weight: 700;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Tab group */
.ot-maint__tab-group {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--rule-light);
}

.ot-maint__tab {
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 10px 14px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  color: var(--ink-4);
}

.ot-maint__tab.active {
  border-bottom-color: var(--teal);
  color: var(--navy);
  font-weight: 600;
}

.ot-maint__tab-content {
  display: none;
}

.ot-maint__tab-content.active {
  display: block;
  padding-top: 14px;
}

.ot-maint__expansion-row {
  display: none;
}

.ot-maint__expansion-row.show {
  display: table-row;
}

/* Work order table + toolbar */
.ot-maint__wo-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.ot-maint__btn-new-wo {
  background: var(--navy);
  color: var(--white);
  border: 0;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.ot-maint__btn-new-wo:hover { background: var(--navy-dark); }

.ot-maint__wo-table,
.ot-maint__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.ot-maint__wo-table th,
.ot-maint__wo-table td,
.ot-maint__table th,
.ot-maint__table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--rule-light);
  text-align: left;
  vertical-align: top;
  color: var(--ink-2);
}

.ot-maint__wo-table th,
.ot-maint__table th {
  background: var(--paper);
  color: var(--navy);
  font-weight: 700;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ot-maint__table-container {
  overflow-x: auto;
  min-width: 0;
}

.ot-maint__actions-cell {
  display: flex;
  gap: 4px;
}

.ot-maint__wo-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* Buttons (action variants) */
.ot-maint__btn-action,
.ot-maint__btn-wo-action {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--navy);
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.ot-maint__btn-action:hover,
.ot-maint__btn-wo-action:hover {
  background: var(--paper);
  border-color: var(--teal);
}

.ot-maint__btn-action--close,
.ot-maint__btn-wo-action--close {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.ot-maint__btn-action--close:hover,
.ot-maint__btn-wo-action--close:hover {
  background: var(--navy-dark);
}

.ot-maint__btn-wo-action--reopen {
  background: var(--white);
  color: var(--navy);
  border-color: var(--rule);
}

.ot-maint__btn-add {
  background: var(--navy);
  color: var(--white);
  border: 0;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.ot-maint__btn-delete {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--navy);
  padding: 4px 10px;
  font-size: 11px;
  cursor: pointer;
}

.ot-maint__btn-delete.hidden { display: none; }

.ot-maint__btn-cancel,
.ot-maint__btn-wo-cancel {
  background: var(--white);
  color: var(--ink-2);
  border: 1px solid var(--rule);
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.ot-maint__btn-save,
.ot-maint__btn-wo-submit {
  background: var(--navy);
  color: var(--white);
  border: 0;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.ot-maint__btn-save:hover,
.ot-maint__btn-wo-submit:hover { background: var(--navy-dark); }

/* Badges */
.ot-maint__severity-badge,
.ot-maint__status-badge,
.ot-maint__source-badge,
.ot-maint__wo-status-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--paper);
  color: var(--ink-2);
  border: 1px solid var(--rule);
}

.ot-maint__severity-badge--extreme,
.ot-maint__status-badge--extreme,
.ot-maint__wo-status-badge--extreme { background: var(--paper); color: var(--navy-dark); border-color: var(--navy-dark); }

.ot-maint__severity-badge--serious,
.ot-maint__status-badge--serious,
.ot-maint__wo-status-badge--serious { background: var(--paper); color: var(--navy); border-color: var(--navy); }

.ot-maint__severity-badge--moderate,
.ot-maint__status-badge--moderate,
.ot-maint__wo-status-badge--moderate { background: var(--paper); color: var(--ink-3); border-color: var(--ink-3); }

.ot-maint__severity-badge--slight,
.ot-maint__status-badge--slight,
.ot-maint__wo-status-badge--slight { background: var(--teal-light); color: var(--teal); border-color: var(--teal); }

.ot-maint__severity-badge--ok,
.ot-maint__status-badge--ok,
.ot-maint__wo-status-badge--ok { background: var(--teal-light); color: var(--teal); border-color: var(--teal); }

.ot-maint__source-badge--source-cm,
.ot-maint__source-badge--source-sap,
.ot-maint__source-badge--source-operator,
.ot-maint__source-badge--source-inspection {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--rule);
}

.ot-maint__trend-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  background: var(--paper);
  color: var(--ink-3);
  border: 1px solid var(--rule);
}

/* Chart container + legend */
.ot-maint__chart-container {
  position: relative;
  background: var(--white);
  border: 1px solid var(--rule-light);
  padding: 12px;
  margin-top: 10px;
}

.ot-maint__chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 11px;
  color: var(--ink-3);
  margin-top: 8px;
}

.ot-maint__legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ot-maint__legend-color {
  width: 10px;
  height: 10px;
  display: inline-block;
}

/* Horizontal bar chart (top problems) */
.ot-maint__horizontal-bar {
  display: grid;
  gap: 6px;
  margin-top: 8px;
}

.ot-maint__bar-item {
  display: grid;
  grid-template-columns: 160px 1fr 60px;
  gap: 8px;
  align-items: center;
  font-size: 11px;
  color: var(--ink-2);
}

.ot-maint__bar-label { color: var(--ink-3); }

.ot-maint__bar-container {
  background: var(--rule-light);
  height: 14px;
  overflow: hidden;
}

.ot-maint__bar-fill {
  background: var(--navy);
  height: 100%;
}

.ot-maint__bar-value {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--navy);
  font-weight: 600;
}

/* Summary blocks */
.ot-maint__summary-section {
  display: grid;
  gap: 14px;
  margin: 16px 0;
}

.ot-maint__summary-card {
  background: var(--white);
  border: 1px solid var(--rule-light);
  padding: 14px 16px;
}

.ot-maint__summary-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px solid var(--rule-light);
}

.ot-maint__summary-item:last-child { border-bottom: 0; }

.ot-maint__summary-item-label {
  font-size: 11px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.ot-maint__summary-item-value {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}

/* WO summary grid (chart panel) */
.ot-maint__wo-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.ot-maint__wo-summary-card {
  background: var(--paper);
  border-top: 2px solid var(--navy);
  padding: 8px 10px;
  text-align: center;
}

.ot-maint__wo-summary-value {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
}

.ot-maint__wo-summary-unit {
  font-size: 10px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

/* Health impact box */
.ot-maint__health-impact-box {
  background: var(--paper);
  border-left: 3px solid var(--teal);
  padding: 10px 14px;
  margin: 10px 0;
  font-size: 12px;
  color: var(--ink-3);
}

.ot-maint__health-impact-formula {
  font-family: "Courier New", Courier, monospace;
  color: var(--navy);
  margin-top: 6px;
  font-size: 11px;
}

/* Expansion (collapsible) content */
.ot-maint__expansion-content {
  padding: 8px 12px;
  background: var(--paper);
  font-size: 11px;
  color: var(--ink-3);
  line-height: 1.5;
}

.ot-maint__expansion-label {
  font-weight: 700;
  color: var(--navy);
  display: inline-block;
  margin-right: 6px;
}

/* Defect toolbar */
.ot-maint__defect-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

/* Form groups */
.ot-maint__form-group,
.ot-maint__wo-form-group {
  display: grid;
  gap: 4px;
  margin-bottom: 12px;
}

.ot-maint__wo-form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.ot-maint__form-group label,
.ot-maint__wo-form-group label {
  font-size: 11px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.ot-maint__form-group input,
.ot-maint__form-group select,
.ot-maint__form-group textarea,
.ot-maint__wo-form-group input,
.ot-maint__wo-form-group select,
.ot-maint__wo-form-group textarea {
  border: 1px solid var(--rule);
  background: var(--white);
  padding: 8px 10px;
  font: inherit;
  color: var(--ink);
  font-size: 12px;
}

.ot-maint__form-group textarea,
.ot-maint__wo-form-group textarea {
  min-height: 72px;
  resize: vertical;
}

/* Modals (defect modal + WO modal share the same structural pattern) */
.ot-maint__modal-overlay,
.ot-maint__wo-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--navy-dark);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 24px;
  pointer-events: none;
}

.ot-maint__modal-overlay.active,
.ot-maint__modal-overlay.show,
.ot-maint__wo-modal-overlay.active,
.ot-maint__wo-modal-overlay.show {
  display: flex;
  pointer-events: auto;
}

.ot-maint__modal-panel,
.ot-maint__wo-modal-panel {
  background: var(--white);
  width: 100%;
  max-width: 600px;
  max-height: 95vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.ot-maint__modal-header,
.ot-maint__wo-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--rule-light);
}

.ot-maint__modal-header h2,
.ot-maint__wo-modal-header h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
}

.ot-maint__modal-close-btn,
.ot-maint__wo-modal-close {
  background: transparent;
  border: 0;
  color: var(--ink-3);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
}

.ot-maint__modal-close-btn:hover,
.ot-maint__wo-modal-close:hover { color: var(--navy); }

.ot-maint__modal-body,
.ot-maint__wo-modal-body {
  padding: 14px 18px;
  overflow-y: auto;
}

.ot-maint__modal-footer,
.ot-maint__wo-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 18px;
  border-top: 1px solid var(--rule-light);
  background: var(--paper);
}

/* Mobile menu */
.ot-maint__mobile-menu-btn {
  display: none;
}

@media (max-width: 980px) {
  .ot-maint__mobile-menu-btn {
    display: inline-grid;
    place-items: center;
    width: 36px;
    height: 36px;
    background: var(--navy);
    color: var(--white);
    border: 0;
    cursor: pointer;
  }
}

/* Responsive */
@media (max-width: 1100px) {
  .ot-maint__downtime-split-header {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .ot-maint__stack {
    padding: 12px 14px;
  }
  .ot-maint__import-panel {
    grid-template-columns: 1fr;
  }
  .ot-maint__wo-form-row {
    grid-template-columns: 1fr;
  }
}


/* P1a additions: lifted inline-style modifiers and primitives */
.ot-maint__kpi-label--unit {
  font-size: 10px;
  margin-top: 8px;
}

.ot-maint__kpi-value--narrow {
  font-size: 24px;
}

.ot-maint__summary-section--spaced {
  margin-top: 32px;
}

.ot-maint__info-banner {
  background: var(--paper);
  border-left: 3px solid var(--teal);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--ink-2);
}

.ot-maint__table-empty {
  text-align: center;
  padding: 20px;
  color: var(--ink-3);
}

/* P1 cleanup additions: lifted from inline styles */
.ot-maint__hint {
  font-size: 11px;
  color: var(--ink-4);
  margin-top: 6px;
}

.ot-maint__inline-chip {
  display: inline-block;
  margin: 0 2px;
}

.ot-maint__span-2 {
  grid-column: span 2;
}

.ot-maint__full-width {
  width: 100%;
}