/**
 * Shared UI components — foundation layer
 * @see docs/ui-redesign/design-system.md
 */

/* Typography */
body.app-body h1,
body.app-body h2,
body.app-body h3,
body.app-body h4,
body.app-body h5,
body.app-body h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

body.app-body h1 {
  font-size: var(--font-size-xl);
}

body.app-body h2 {
  font-size: var(--font-size-lg);
}

body.app-body h3 {
  font-size: var(--font-size-md);
}

body.app-body .app-main__content a.ui-btn,
body.app-body .ui-topbar a.ui-btn,
body.app-body .app-main__content a.ui-btn:hover,
body.app-body .ui-topbar a.ui-btn:hover,
body.app-body .app-main__content a.ui-btn:focus-visible,
body.app-body .ui-topbar a.ui-btn:focus-visible {
  text-decoration: none;
}

body.app-body .app-main__content a.ui-btn--primary,
body.app-body .app-main__content a.ui-btn.ui-btn--primary,
body.app-body .ui-topbar a.ui-btn--primary,
body.app-body .ui-topbar a.ui-btn.ui-btn--primary,
body.app-body .ui-topbar a.ui-topbar__cta {
  color: var(--color-brand-on);
}

body.app-body .app-main__content a.ui-btn--primary:hover,
body.app-body .app-main__content a.ui-btn--primary:focus-visible,
body.app-body .ui-topbar a.ui-btn--primary:hover,
body.app-body .ui-topbar a.ui-btn--primary:focus-visible,
body.app-body .ui-topbar a.ui-topbar__cta:hover,
body.app-body .ui-topbar a.ui-topbar__cta:focus-visible {
  color: var(--color-brand-on);
}

body.app-body a.ui-btn--secondary,
body.app-body a.ui-btn.ui-btn--secondary {
  color: var(--color-text-primary);
}

body.app-body a.ui-btn--ghost,
body.app-body a.ui-btn.ui-btn--ghost {
  color: var(--color-text-secondary);
}

body.app-body a.ui-btn--danger,
body.app-body a.ui-btn.ui-btn--danger {
  color: var(--color-danger);
}

/* Page header shell */
.ui-page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--layout-header-gap);
}

.ui-page-header__main {
  flex: 1 1 12rem;
  min-width: 0;
}

.ui-page-header__title {
  margin: 0;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

.ui-page-header__meta {
  margin: var(--space-1) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.ui-page-header__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* Buttons */
.ui-btn,
a.ui-btn,
button.ui-btn,
input.ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--form-control-height);
  margin: 0;
  padding: var(--space-2) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  text-decoration: none;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  box-sizing: border-box;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.ui-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  box-shadow: none;
}

.ui-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.ui-btn--primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-brand-on);
}

.ui-btn--primary:hover,
.ui-btn--primary:focus-visible {
  background: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
  color: var(--color-brand-on);
}

.ui-btn--secondary {
  background: var(--color-surface-card);
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
}

.ui-btn--secondary:hover,
.ui-btn--secondary:focus-visible {
  background: var(--color-surface-zebra);
  border-color: var(--color-text-secondary);
}

.ui-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-text-secondary);
}

.ui-btn--ghost:hover,
.ui-btn--ghost:focus-visible {
  background: var(--color-surface-zebra);
  color: var(--color-text-primary);
}

.ui-btn--danger {
  background: var(--color-surface-card);
  border-color: #fca5a5;
  color: var(--color-danger);
}

.ui-btn--danger:hover,
.ui-btn--danger:focus-visible {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
}

/* Bridge legacy .button to tokens where not overridden by buttons.css */
.content a.button.ui-btn--primary,
.content button.button.ui-btn--primary,
.content input.button.ui-btn--primary,
.order-view-actions a.button.ui-btn--primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-brand-on);
}

.content a.button.ui-btn--primary:hover,
.content button.button.ui-btn--primary:hover,
.content input.button.ui-btn--primary:hover,
.order-view-actions a.button.ui-btn--primary:hover {
  background: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
  color: var(--color-brand-on);
}

.content a.button.ui-btn--ghost,
.content button.button.ui-btn--ghost {
  background: var(--color-surface-card);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

/* Form controls — foundation density */
.content form .input > label,
.content form .order-form-field > label,
.ui-form-field > label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.ui-form-field {
  margin-bottom: var(--space-3);
}

.content form input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]):not([type="submit"]):not([type="button"]):not([type="reset"]):not([type="file"]):not([type="image"]),
.content form select:not(.high):not(.very_high),
.content form textarea,
.ui-form-control {
  width: 100%;
  min-height: var(--form-control-height);
  margin: 0;
  padding: var(--form-control-padding-y) var(--form-control-padding-x);
  border: 1px solid var(--form-control-border-color);
  border-radius: var(--form-control-border-radius);
  background: var(--form-control-bg);
  box-sizing: border-box;
  font-family: inherit;
  font-size: var(--form-control-font-size);
  line-height: var(--form-control-line-height);
  color: var(--form-control-color);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.content form textarea,
.ui-form-control--textarea {
  height: auto;
  min-height: var(--form-control-textarea-min-height);
  resize: vertical;
}

.content form input:focus,
.content form select:focus,
.content form textarea:focus,
.ui-form-control:focus {
  border-color: var(--form-control-focus-border-color);
  outline: none;
  box-shadow: var(--form-control-focus-shadow);
}

.content form .input.error input,
.content form .input.error select,
.content form .input.error textarea,
.is-invalid,
input.is-invalid,
select.is-invalid,
textarea.is-invalid {
  border-color: var(--color-danger);
}

.error-message {
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-danger);
}

/* Tables */
.ui-table,
.content table:not(.fc-scrollgrid) {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-compact);
  color: var(--color-text-primary);
}

.ui-table thead th,
.content table:not(.fc-scrollgrid) thead th {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-surface-zebra);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-align: left;
  white-space: nowrap;
  color: var(--color-text-primary);
}

.ui-table tbody td,
.content table:not(.fc-scrollgrid) tbody td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  min-height: var(--table-row-height);
}

.ui-table tbody tr:nth-child(even),
.content table:not(.fc-scrollgrid) tbody tr:nth-child(even) {
  background: var(--color-surface-zebra);
}

.ui-table tbody tr:hover,
.content table:not(.fc-scrollgrid) tbody tr:hover {
  background: var(--color-surface-page-alt);
}

.ui-table--numeric,
.ui-table td.is-numeric,
.content table:not(.fc-scrollgrid) td.is-numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.ui-table-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.ui-table-card .table-responsive {
  margin: 0;
}

/* Status badges */
.ui-status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.125rem var(--space-2);
  border-radius: var(--radius-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  white-space: nowrap;
}

.ui-status-badge--neutral {
  background: var(--color-neutral-bg);
  color: var(--color-neutral);
}

.ui-status-badge--info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.ui-status-badge--success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.ui-status-badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.ui-status-badge--danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.ui-status-badge--muted {
  background: var(--color-muted-bg);
  color: var(--color-muted);
}

/* Legacy education + wilson badge bridge */
.education-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.125rem var(--space-2);
  border-radius: var(--radius-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.education-status-red {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.education-status-yellow,
.education-status-orange {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.education-status-green {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.education-status-blue {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.wilson-status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem var(--space-2);
  border-radius: var(--radius-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.wilson-driver-name,
.order-view-value--wilson-driver .wilson-status-badge {
  font-size: 1.125rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
}

a.wilson-driver-name {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a.wilson-driver-name:hover,
a.wilson-driver-name:focus-visible {
  text-decoration-thickness: 2px;
  outline: none;
}

.wilson-status-badge--ok {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.wilson-status-badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.wilson-status-badge--muted {
  background: var(--color-muted-bg);
  color: var(--color-muted);
}

.wilson-status-badge--partial {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning);
}

.wilson-train-segments {
  margin-top: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.wilson-train-segment {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: 0.85em;
}

.wilson-train-segment__name {
  color: var(--color-muted);
}

.order-train-stops-view {
  width: 100%;
  border-collapse: collapse;
}

.order-train-stops-view th,
.order-train-stops-view td {
  text-align: left;
  padding: var(--space-1) var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.order-train-stops-view .order-train-stop--split td {
  background: var(--color-warning-bg);
}

/* Alerts */
.ui-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}

.ui-alert__icon {
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.ui-alert__body {
  flex: 1 1 auto;
  min-width: 0;
}

.ui-alert__title {
  margin: 0 0 var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.ui-alert__message {
  margin: 0;
}

.ui-alert--info,
.message.info,
.message {
  background: var(--color-info-bg);
  border-color: #93c5fd;
  color: var(--color-info);
}

.ui-alert--success,
.message.success {
  background: var(--color-success-bg);
  border-color: #86efac;
  color: var(--color-success);
}

.ui-alert--warning,
.message.warning {
  background: var(--color-warning-bg);
  border-color: #fcd34d;
  color: var(--color-warning);
}

.ui-alert--danger,
.message.error {
  background: var(--color-danger-bg);
  border-color: #fca5a5;
  color: var(--color-danger);
}

.ui-alert--critical {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.message.hidden {
  display: none;
}

/* Impersonation banner uses alert tokens */
.impersonation-banner {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-bottom: 1px solid #fcd34d;
}

/* Breadcrumbs in topbar */
.ui-topbar .breadcrumb-nav {
  margin: 0;
}

.ui-topbar .breadcrumbs-trail {
  font-size: var(--font-size-sm);
}

/* Focus visibility */
body.app-body :focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

body.app-body .ui-btn:focus-visible,
body.app-body input:focus-visible,
body.app-body select:focus-visible,
body.app-body textarea:focus-visible,
body.app-body button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.35);
}

/* Filter bar component */
.ui-filter-bar__title {
  flex: 0 0 100%;
  margin: 0 0 var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
}

.ui-filter-bar__fields {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-3) var(--space-4);
  min-width: 0;
}

.ui-filter-bar__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.ui-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* Detail grid component */
.ui-detail-grid__field--full {
  flex: 1 1 100%;
}

/* Data table wrapper */
.ui-data-table-card__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-card);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.ui-data-table-card__empty {
  padding: var(--space-6);
  text-align: center;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

/* ------------------------------------------------------------------ */
/* Rail / timetable components (train runs, rail messages, timetables) */
/* ------------------------------------------------------------------ */

/* Generic .badge-* used across rail templates — same visual system as
   .ui-status-badge, kept as an alias so existing markup works. */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.125rem var(--space-2);
  border-radius: var(--radius-xs);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  white-space: nowrap;
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.badge-secondary {
  background: var(--color-neutral-bg);
  color: var(--color-neutral);
}

/* .button-primary / .button-small used in rail templates */
.content .button.button-primary,
.content a.button.button-primary,
.content button.button.button-primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-brand-on);
}

.content .button.button-primary:hover,
.content a.button.button-primary:hover,
.content button.button.button-primary:hover,
.content .button.button-primary:focus-visible {
  background: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
  color: var(--color-brand-on);
}

.content .button.button-small,
.content a.button.button-small,
.content button.button.button-small {
  min-height: 2rem;
  padding: 0.125rem var(--space-3);
  font-size: var(--font-size-xs);
  line-height: 1.9rem;
}

/* Official timetable table — the InfraGO schedule is the lead element,
   so it gets a real design: compact rows, tabular figures, quiet header. */
.train-timetable-table {
  width: 100%;
  margin: var(--space-2) 0 var(--space-4);
  border-collapse: collapse;
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: var(--font-size-sm);
}

.train-timetable-table thead th {
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-zebra);
  border-bottom: 1px solid var(--color-border-strong);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: left;
  white-space: nowrap;
}

.train-timetable-table tbody td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  font-variant-numeric: tabular-nums;
}

.train-timetable-table tbody tr:last-child td {
  border-bottom: none;
}

.train-timetable-table tbody tr:hover td {
  background: var(--color-surface-zebra);
}

.train-timetable-table .timetable-point-name {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.train-timetable-table .timetable-point-code {
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

.train-timetable-table .timetable-track-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: #1e3a8a;
  color: #fff;
  font-family: var(--font-family-mono);
  font-size: 0.82rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}

/* Schedule source badge — shown when a DB InfraGO timetable exists
   (or is pending review). */
.schedule-source-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.125rem var(--space-2);
  border-radius: var(--radius-xs);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  white-space: nowrap;
}

.schedule-source-badge::before {
  content: '';
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: currentColor;
}

.schedule-source-badge--timetable {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.schedule-source-badge--partial {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.schedule-source-badge--pending {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.order-train-section-title .schedule-source-badge {
  margin-left: var(--space-2);
  vertical-align: middle;
}

.train-timetable-meta {
  margin: 0 0 var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

/* Schedule status inside the collapsed train card header */
.order-train-schedule-status {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
  max-width: 100%;
}

/* Larger labels: the default badge size is hard to read in the card header. */
.order-train-schedule-status .schedule-source-badge,
.order-train-schedule-status .badge {
  font-size: var(--font-size-sm);
}

/* Order summary chips — at-a-glance row under the order headline */
.order-summary-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-2) 0 var(--space-4);
}

.order-summary-chip {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 0.3rem var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-card);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.order-summary-chip strong {
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  font-variant-numeric: tabular-nums;
}

.order-summary-chip--ok {
  border-color: rgba(22, 101, 52, 0.25);
  background: var(--color-success-bg);
  color: var(--color-success);
}

.order-summary-chip--ok strong {
  color: var(--color-success);
}

.order-summary-chip--attention {
  border-color: rgba(146, 64, 14, 0.3);
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.order-summary-chip--attention strong {
  color: var(--color-warning);
}

.order-summary-chip--danger {
  border-color: rgba(185, 28, 28, 0.3);
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.order-summary-chip--danger strong {
  color: var(--color-danger);
}