:root {
  --bg: #f5f7fb;
  --fg: #1b2430;
  --card: #ffffff;
  --border: #d9e0ea;
  --sidebar: #ffffff;
}
[data-theme="dark"] {
  --bg: #121826;
  --fg: #e5e7eb;
  --card: #1f2937;
  --border: #334155;
  --sidebar: #111827;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
}
.app-topbar,
.card,
.table,
.accordion-item,
.form-control {
  background-color: var(--card);
  color: var(--fg);
  border-color: var(--border);
}
/* Use Bootstrap CSS vars for selects — direct bg/color breaks native select text on Windows. */
.form-select {
  --bs-form-select-bg: var(--card);
  --bs-form-select-color: var(--fg);
  border-color: var(--border);
  color-scheme: light dark;
}
html[data-theme="dark"] .form-select {
  color-scheme: dark;
}
.form-select option {
  color: var(--fg);
  background-color: var(--card);
}
.public-registration-wrap .form-select {
  -webkit-text-fill-color: var(--fg);
}
.app-sidebar {
  background-color: var(--sidebar);
}
.tree-link {
  padding: 0.45rem 0.6rem;
  border-radius: 0.4rem;
  color: var(--fg);
}
.tree-link.active,
.tree-link:hover {
  background: rgba(13, 110, 253, 0.15);
  color: #0d6efd;
}
.accordion-button {
  background-color: var(--card);
  color: var(--fg);
}
.accordion-button:not(.collapsed) {
  background-color: rgba(13, 110, 253, 0.15);
  color: #0d6efd;
}
.event-tree-row {
  padding: 0.2rem 0.25rem;
}
.event-tree-row .tree-link {
  margin-right: 0.25rem;
}
.event-tree-toggle {
  min-width: 2rem;
  border: 1px solid var(--border);
  color: var(--fg);
  background: var(--card);
}
.event-tree-toggle:hover {
  color: #0d6efd;
  background: rgba(13, 110, 253, 0.15);
}
.event-tree-toggle.collapsed span[aria-hidden="true"] {
  display: inline-block;
  transform: rotate(-90deg);
}
.table-responsive {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}
.slot-calendar-wrap .table td,
.slot-calendar-wrap .table th {
  min-width: 180px;
}
.slot-time-col {
  white-space: nowrap;
  font-weight: 600;
}
.slot-cell {
  vertical-align: top;
}
.slot-assign-form .form-select {
  min-width: 120px;
}
.public-registration-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}
.public-card {
  width: 100%;
  max-width: 680px;
}
[data-theme="dark"] .btn-outline-secondary {
  color: #cbd5e1;
  border-color: #64748b;
}
[data-theme="dark"] .text-muted {
  color: #9ca3af !important;
}
@media (max-width: 991px) {
  .app-sidebar {
    min-height: auto;
    border-right: none !important;
    border-bottom: 1px solid var(--border);
  }
}

/* PWA: status chip, toast, install hint */
.has-pwa-chrome {
  padding-top: env(safe-area-inset-top, 0);
}
.pwa-sync-chip {
  position: fixed;
  top: max(0.5rem, env(safe-area-inset-top));
  right: max(0.5rem, env(safe-area-inset-right));
  z-index: 1080;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  font-size: 0.75rem;
  line-height: 1;
  max-width: min(42vw, 200px);
}
.pwa-sync-icon {
  font-size: 0.85rem;
  line-height: 1;
  display: inline-block;
}
.pwa-sync-spin {
  animation: pwa-spin 1s linear infinite;
}
@keyframes pwa-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.pwa-sync--green .pwa-sync-icon {
  color: #198754;
}
.pwa-sync--yellow .pwa-sync-icon {
  color: #fd7e14;
}
.pwa-sync--red .pwa-sync-icon {
  color: #dc3545;
}
.pwa-sync-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
/* In-app header row: sync chip flows with layout (non-public pages). */
.pwa-sync-chip--inbar {
  position: static;
  top: auto;
  right: auto;
  z-index: auto;
  max-width: none;
  width: 100%;
  box-sizing: border-box;
  justify-content: flex-start;
}
.app-topbar-sync-row {
  min-height: 0;
}
.app-nav-menu-btn {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
}
.app-nav-menu-btn .navbar-toggler-icon {
  width: 1.25rem;
  height: 1.25rem;
}
[data-theme='dark'] .app-nav-menu-btn .navbar-toggler-icon {
  filter: invert(1) grayscale(100%);
}
.pwa-toast {
  position: fixed;
  top: max(0.5rem, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1090;
  max-width: min(520px, 94vw);
  padding-right: 2.25rem;
  margin: 0;
}
.pwa-toast-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
}
.pwa-install-hint {
  position: fixed;
  bottom: max(1rem, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1070;
  max-width: min(440px, 96vw);
  margin: 0;
}