:root {
  --brand-navy: #0f172a;
  --brand-accent: #0284c7;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
}

/* Prevent Tailwind display utilities (.flex, .grid, etc.) from overriding HTML [hidden] */
[hidden] {
  display: none !important;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: #f1f5f9;
  color: #0f172a;
}

h1, h2, h3, .font-display {
  font-family: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
}

/* Native <dialog> scroll containment & backdrop (Modern Web Guidance) */
dialog:modal {
  overscroll-behavior: contain;
  max-width: min(920px, 95vw);
  max-height: 90vh;
  margin: auto;
  border: 1px solid #cbd5e1;
  border-radius: 0.875rem;
  padding: 0;
  box-shadow: 0 25px 50px -12px rgb(15 23 42 / 0.35);
}

dialog.dialog-narrow:modal {
  max-width: min(580px, 95vw);
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background-color: rgb(15 23 42 / 0.58);
  backdrop-filter: blur(3px);
}

/* Tablist accessible selection indicator (shape + color, never color alone) */
.nav-tablist {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: inline proximity;
  scrollbar-width: thin;
}

.nav-tablist [role="tab"],
.nav-tablist button[aria-selected] {
  position: relative;
  flex: none;
  scroll-snap-align: start;
}

.nav-tablist button[aria-selected="true"] {
  color: var(--brand-accent);
}

.nav-tablist button[aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  border-block-end: 3px solid var(--brand-accent);
}

/* Responsive table with sticky headers & @container mobile cards */
.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  max-block-size: min(680px, 76vh);
  container-type: inline-size;
  background: var(--surface);
  border-radius: 0.75rem;
  border: 1px solid #e2e8f0;
}

.table-wrapper table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.table-wrapper thead {
  position: sticky;
  inset-block-start: 0;
  z-index: 2;
  background: #0f172a;
  color: #f8fafc;
}

.table-wrapper tbody th {
  position: sticky;
  inset-inline-start: 0;
  z-index: 1;
  background: #ffffff;
}

.table-wrapper tbody tr:hover th,
.table-wrapper tbody tr:hover td {
  background-color: #f8fafc;
}

@container (width < 680px) {
  .table-wrapper table,
  .table-wrapper thead,
  .table-wrapper tbody,
  .table-wrapper tr,
  .table-wrapper th,
  .table-wrapper td {
    display: block;
  }

  .table-wrapper thead {
    display: none;
  }

  .table-wrapper tbody tr {
    margin: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 0.625rem;
    overflow: hidden;
    background: #ffffff;
  }

  .table-wrapper tbody th {
    position: sticky;
    inset-block-start: 0;
    background: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
  }

  .table-wrapper td[data-col]::before {
    content: attr(data-col) ": ";
    font-weight: 600;
    color: #475569;
  }
}

/* Manual Popover Toast Region */
#toast-region {
  position: fixed;
  inset: auto 1.25rem 1.25rem auto;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  pointer-events: none;
}

.toast-popover[popover] {
  position: static;
  margin: 0;
  inset: auto;
  pointer-events: auto;
  border: 1px solid #cbd5e1;
  border-radius: 0.625rem;
  padding: 0.75rem 1rem;
  background: #0f172a;
  color: #f8fafc;
  box-shadow: 0 10px 25px -5px rgb(15 23 42 / 0.35);
  max-width: min(380px, 90vw);
}

.toast-popover[popover]:is(:popover-open, .\:popover-open) {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

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

/* Calendar Grid */
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

@media (max-width: 768px) {
  .cal-grid-responsive {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}