/* ============================================================================
 * MODERN UI THEME — Phase 1
 *
 * Dark greyscale design system. Loads after Bootstrap CSS and style.css and
 * overrides their visuals while preserving every Bootstrap class name so
 * existing markup and Bootstrap JS components keep working unchanged.
 *
 * To roll back: remove the <link> to this file (and the Inter font + Tailwind
 * CDN lines) from base.html. Original Bootstrap styling returns immediately.
 * ============================================================================ */

/* ---- Design tokens ------------------------------------------------------- */
:root {
  /* Surfaces — widened steps so each layer reads as visibly distinct
     (deltas of 16–23 hex points) instead of barely-perceptible 6–10. */
  --ui-bg: #050505;
  --ui-surface: #1c1c1c;
  --ui-surface-elevated: #2a2a2a;
  --ui-surface-hover: #333333;

  /* Borders — bumped so dividers are visible against the new card bg */
  --ui-border-subtle: #262626;
  --ui-border: #383838;
  --ui-border-strong: #525252;

  /* Text */
  --ui-text: #fafafa;
  --ui-text-muted: #a3a3a3;
  --ui-text-subtle: #737373;
  --ui-text-inverse: #0a0a0a;

  /* Accents (white-on-black premium) */
  --ui-accent: #ffffff;
  --ui-accent-hover: #e5e5e5;
  --ui-accent-text: #0a0a0a;

  /* Status palette (subtle, dark-theme-friendly) */
  --ui-success: #10b981;
  --ui-success-fg: #6ee7b7;
  --ui-success-bg: rgba(16, 185, 129, 0.15);
  --ui-danger: #ef4444;
  --ui-danger-fg: #fca5a5;
  --ui-danger-bg: rgba(239, 68, 68, 0.15);
  --ui-warning: #f59e0b;
  --ui-warning-fg: #fcd34d;
  --ui-warning-bg: rgba(245, 158, 11, 0.15);
  --ui-info: #3b82f6;
  --ui-info-fg: #93c5fd;
  --ui-info-bg: rgba(59, 130, 246, 0.15);

  /* Shapes */
  --ui-radius-sm: 0.375rem;
  --ui-radius: 0.5rem;
  --ui-radius-lg: 0.75rem;

  /* Shadows */
  --ui-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --ui-shadow: 0 4px 12px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.3);
  --ui-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5), 0 2px 6px rgba(0, 0, 0, 0.4);

  /* Type */
  --ui-font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

/* ---- Body & typography --------------------------------------------------- */
html, body {
  background-color: var(--ui-bg) !important;
  color: var(--ui-text);
  font-family: var(--ui-font) !important;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

h1, h2, h3, h4, h5, h6 {
  color: var(--ui-text);
  letter-spacing: -0.02em;
  font-weight: 600;
}

h1 { font-size: 1.875rem; line-height: 1.2; }
h2 { font-size: 1.5rem; line-height: 1.3; }
h3 { font-size: 1.25rem; line-height: 1.35; }
h4 { font-size: 1.125rem; line-height: 1.4; }

a {
  color: var(--ui-text);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--ui-text-muted); }

hr { border-color: var(--ui-border) !important; opacity: 1; }

small, .small { color: var(--ui-text-muted); }

/* ---- Header -------------------------------------------------------------- */
header {
  background-color: var(--ui-bg) !important;
  border-bottom: 1px solid var(--ui-border) !important;
  border-color: var(--ui-border) !important;
}

/* ---- Sidebar (desktop) --------------------------------------------------- */
.sidebar {
  background-color: var(--ui-bg) !important;
  border-right: 1px solid var(--ui-border);
  margin-top: 4.5rem;
  padding: 0.875rem 0.625rem;
}
.sidebar ul { padding: 0; list-style: none; }
.sidebar li { border: none !important; padding: 0; }
.sidebar li a, .sidebar .nav-drawer-toggle {
  display: flex !important;
  align-items: center;
  gap: 0.75rem;
  color: var(--ui-text-muted) !important;
  padding: 0.625rem 0.875rem !important;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 9999px;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.sidebar li a > i,
.sidebar .nav-drawer-toggle > i:first-child {
  width: 1.125rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--ui-text-subtle);
  flex-shrink: 0;
  transition: color 0.15s ease;
}
.sidebar li a:hover, .sidebar .nav-drawer-toggle:hover {
  background-color: rgba(255, 255, 255, 0.06) !important;
  color: var(--ui-text) !important;
}
.sidebar li a:hover > i,
.sidebar .nav-drawer-toggle:hover > i:first-child {
  color: var(--ui-text);
}
.sidebar li a.active {
  background-color: rgba(255, 255, 255, 0.14) !important;
  color: var(--ui-text) !important;
  font-weight: 600;
  box-shadow: none;
}
.sidebar li a.active > i { color: var(--ui-text); }

/* Operations dropdown chevron — kept as the existing trailing span */
.sidebar .nav-drawer-toggle > span[style*="float"] {
  margin-left: auto;
  font-size: 0.7rem;
  opacity: 0.55;
  float: none !important;
}

.sidebar .nav-drawer { padding-left: 0; }
.sidebar .nav-drawer.open {
  background-color: transparent !important;
  padding: 4px 0;
}
.sidebar .nav-drawer li a {
  padding-left: 1.5rem !important;
  font-size: 0.8125rem;
  color: var(--ui-text-subtle) !important;
}
.sidebar .nav-drawer li a > i {
  width: 1rem;
  font-size: 0.8125rem;
  color: var(--ui-text-subtle);
}
.sidebar .nav-drawer li a:hover { color: var(--ui-text) !important; }
.sidebar .nav-drawer li a:hover > i { color: var(--ui-text); }
.sidebar .nav-drawer li a.active {
  background-color: rgba(255, 255, 255, 0.1) !important;
  color: var(--ui-text) !important;
  font-weight: 600;
}
.sidebar .nav-drawer li a.active > i { color: var(--ui-text); }

.subactive {
  background-color: rgba(255, 255, 255, 0.06) !important;
  color: var(--ui-text) !important;
}

/* ---- Mobile menu --------------------------------------------------------- */
.mobile-menu { background-color: var(--ui-bg) !important; padding: 5rem 0.75rem 1rem; }
.mobile-menu ul { list-style: none; padding: 0; text-align: left; }
.mobile-menu li { border: none !important; padding: 0; }
.mobile-menu li a, .mobile-menu .nav-drawer-toggle {
  display: flex !important;
  align-items: center;
  gap: 0.875rem;
  color: var(--ui-text) !important;
  font-size: 1.125rem !important;
  font-weight: 500;
  padding: 0.875rem 1.125rem !important;
  border-radius: 9999px;
  margin-bottom: 4px;
}
.mobile-menu li a > i,
.mobile-menu .nav-drawer-toggle > i:first-child {
  width: 1.5rem;
  text-align: center;
  font-size: 1.125rem;
  color: var(--ui-text-muted);
  flex-shrink: 0;
}
.mobile-menu li a:hover { background-color: rgba(255, 255, 255, 0.06) !important; }
.mobile-menu li a.active {
  background-color: rgba(255, 255, 255, 0.14) !important;
  color: var(--ui-text) !important;
  font-weight: 600;
}
.mobile-menu .nav-drawer-toggle > span[style*="float"] {
  margin-left: auto; opacity: 0.55; font-size: 0.85rem; float: none !important;
}
.mobile-menu .nav-drawer.open { background-color: transparent !important; }
.mobile-menu .nav-drawer li a { padding-left: 2.25rem !important; font-size: 1rem !important; }
.mobile-menu-toggle, .mobile-menu-close { color: var(--ui-text) !important; }

/* ---- Cards --------------------------------------------------------------- */
.card {
  background-color: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius-lg) !important;
  box-shadow: var(--ui-shadow-sm);
  color: var(--ui-text);
}
.card-body { padding: 1.5rem !important; }
.card-footer {
  background-color: transparent !important;
  border-top: 1px solid var(--ui-border) !important;
  padding: 1rem 1.5rem !important;
  color: var(--ui-text-muted);
}
.card-title { color: var(--ui-text); font-weight: 600; }

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  font-family: var(--ui-font);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border-radius: var(--ui-radius-sm);
  border: 1px solid transparent;
  transition: all 0.15s ease;
  letter-spacing: -0.01em;
}
.btn:focus, .btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
}

.btn-primary {
  background-color: var(--ui-accent) !important;
  border-color: var(--ui-accent) !important;
  color: var(--ui-accent-text) !important;
  font-weight: 600;
}
.btn-primary:hover {
  background-color: var(--ui-accent-hover) !important;
  border-color: var(--ui-accent-hover) !important;
  color: var(--ui-accent-text) !important;
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background-color: var(--ui-surface-elevated) !important;
  border-color: var(--ui-border) !important;
  color: var(--ui-text) !important;
}
.btn-secondary:hover {
  background-color: var(--ui-surface-hover) !important;
  border-color: var(--ui-border-strong) !important;
}

.btn-danger {
  background-color: var(--ui-danger) !important;
  border-color: var(--ui-danger) !important;
  color: white !important;
}
.btn-danger:hover { background-color: #dc2626 !important; border-color: #dc2626 !important; }

.btn-success {
  background-color: var(--ui-success) !important;
  border-color: var(--ui-success) !important;
  color: white !important;
}
.btn-success:hover { background-color: #059669 !important; border-color: #059669 !important; }

.btn-warning {
  background-color: var(--ui-warning) !important;
  border-color: var(--ui-warning) !important;
  color: #1a1300 !important;
}

.btn-link {
  color: var(--ui-text-muted) !important;
  background: transparent !important;
  border: none !important;
  text-decoration: none !important;
}
.btn-link:hover { color: var(--ui-text) !important; }

.btn-outline-primary {
  background: transparent !important;
  border-color: var(--ui-border) !important;
  color: var(--ui-text) !important;
}
.btn-outline-primary:hover {
  background-color: var(--ui-surface-hover) !important;
  border-color: var(--ui-border-strong) !important;
  color: var(--ui-text) !important;
}

.btn-outline-danger {
  background: transparent !important;
  border-color: rgba(239, 68, 68, 0.4) !important;
  color: var(--ui-danger-fg) !important;
}
.btn-outline-danger:hover {
  background-color: var(--ui-danger-bg) !important;
  border-color: var(--ui-danger) !important;
  color: var(--ui-danger-fg) !important;
}

.btn-sm { font-size: 0.75rem; padding: 0.25rem 0.625rem; }

.btn-close {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23a3a3a3'%3E%3Cpath d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/%3E%3C/svg%3E") !important;
  opacity: 0.7;
  filter: none;
}
.btn-close:hover { opacity: 1; }

/* Bootstrap button group */
.btn-group .btn { border-radius: var(--ui-radius-sm); }

/* ---- Tables -------------------------------------------------------------- */
/* Bootstrap 5 paints cell text via var(--bs-table-color) and uses a
   box-shadow inset to render striped/hover/active states. We override the
   CSS variables on .table itself so every descendant cell inherits the
   right colors, and we neutralize the box-shadow paint trick that was
   leaking through specificity. */
.table {
  --bs-table-color: var(--ui-text) !important;
  --bs-table-color-state: var(--ui-text) !important;
  --bs-table-bg: transparent !important;
  --bs-table-bg-state: transparent !important;
  --bs-table-bg-type: transparent !important;
  --bs-table-accent-bg: transparent !important;
  --bs-table-striped-color: var(--ui-text) !important;
  --bs-table-striped-bg: transparent !important;
  --bs-table-hover-color: var(--ui-text) !important;
  --bs-table-hover-bg: transparent !important;
  --bs-table-border-color: var(--ui-border) !important;
  background-color: transparent !important;
  color: var(--ui-text) !important;
  margin-bottom: 0;
}

.table > :not(caption) > * > * {
  background-color: transparent !important;
  color: var(--ui-text) !important;
  box-shadow: none !important;
  border-bottom-color: var(--ui-border-subtle) !important;
}

.table thead th,
.table > thead > tr > th {
  background-color: var(--ui-surface-elevated) !important;
  color: var(--ui-text-muted) !important;
  border-bottom: 1px solid var(--ui-border) !important;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.875rem 1rem !important;
}
.table.sortable-table thead th { cursor: pointer; }

/* Tbody surface so rows are visibly distinct from the page background */
.table > tbody { background-color: var(--ui-surface); }
.table > tbody > tr {
  border-bottom: 1px solid var(--ui-border-subtle) !important;
  transition: background-color 0.1s ease;
}
.table > tbody > tr:nth-child(even) > * {
  background-color: rgba(255, 255, 255, 0.035) !important;
}
.table > tbody > tr:hover > * {
  background-color: var(--ui-surface-hover) !important;
}
.table > tbody > tr > td {
  padding: 0.875rem 1rem !important;
  vertical-align: middle;
  color: var(--ui-text) !important;
  border: none;
}
.table > tbody > tr > td a,
.table tbody td a { color: var(--ui-text) !important; }
.table > tbody > tr > td a:hover,
.table tbody td a:hover {
  color: var(--ui-accent-hover) !important;
  text-decoration: underline;
}

.table-responsive {
  border-radius: var(--ui-radius);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ---- Form controls ------------------------------------------------------- */
/* Inputs are darker than their parent card with a stronger border so they
   read as clearly interactive — the dark-mode-GitHub / Notion / Linear pattern. */
.form-control, .form-select,
input[type="text"], input[type="email"], input[type="password"],
input[type="tel"], input[type="number"], input[type="date"],
input[type="datetime-local"], input[type="time"], input[type="search"],
textarea, select {
  background-color: var(--ui-bg) !important;
  border: 1px solid var(--ui-border-strong) !important;
  color: var(--ui-text) !important;
  border-radius: var(--ui-radius-sm) !important;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-family: var(--ui-font);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.form-control:hover, .form-select:hover,
input:not(:focus):hover, textarea:hover, select:hover {
  border-color: #6a6a6a !important;
}
.form-control:focus, .form-select:focus,
input:focus, textarea:focus, select:focus {
  background-color: var(--ui-bg) !important;
  border-color: #8a8a8a !important;
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.12) !important;
  color: var(--ui-text) !important;
}
.form-control::placeholder, input::placeholder, textarea::placeholder {
  color: var(--ui-text-subtle);
}
.form-label {
  color: var(--ui-text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
}
.form-check-input {
  background-color: var(--ui-surface-elevated) !important;
  border-color: var(--ui-border) !important;
}
.form-check-input:checked {
  background-color: var(--ui-accent) !important;
  border-color: var(--ui-accent) !important;
}

/* Required-invalid keep red border, but tuned for dark */
input[required]:invalid,
select[required]:invalid,
textarea[required]:invalid {
  border-color: rgba(239, 68, 68, 0.7) !important;
}

/* ---- Alerts -------------------------------------------------------------- */
.alert {
  border-radius: var(--ui-radius) !important;
  border: 1px solid var(--ui-border) !important;
  background-color: var(--ui-surface) !important;
  color: var(--ui-text) !important;
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
}
.alert-success {
  background-color: var(--ui-success-bg) !important;
  border-color: rgba(16, 185, 129, 0.3) !important;
  color: var(--ui-success-fg) !important;
}
.alert-danger {
  background-color: var(--ui-danger-bg) !important;
  border-color: rgba(239, 68, 68, 0.3) !important;
  color: var(--ui-danger-fg) !important;
}
.alert-warning {
  background-color: var(--ui-warning-bg) !important;
  border-color: rgba(245, 158, 11, 0.3) !important;
  color: var(--ui-warning-fg) !important;
}
.alert-info {
  background-color: var(--ui-info-bg) !important;
  border-color: rgba(59, 130, 246, 0.3) !important;
  color: var(--ui-info-fg) !important;
}

/* ---- Badges -------------------------------------------------------------- */
.badge {
  font-weight: 500;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--ui-radius-sm);
  letter-spacing: 0.01em;
}
.badge.bg-primary    { background-color: var(--ui-info-bg) !important;    color: var(--ui-info-fg) !important; }
.badge.bg-secondary  { background-color: var(--ui-surface-hover) !important; color: var(--ui-text-muted) !important; }
.badge.bg-success    { background-color: var(--ui-success-bg) !important; color: var(--ui-success-fg) !important; }
.badge.bg-danger     { background-color: var(--ui-danger-bg) !important;  color: var(--ui-danger-fg) !important; }
.badge.bg-warning    { background-color: var(--ui-warning-bg) !important; color: var(--ui-warning-fg) !important; }
.badge.bg-info       { background-color: var(--ui-info-bg) !important;    color: var(--ui-info-fg) !important; }
.badge.bg-dark       { background-color: #000 !important;                 color: var(--ui-text) !important; }
.badge.bg-light      { background-color: var(--ui-surface-elevated) !important; color: var(--ui-text) !important; }
.badge.bg-purple     { background-color: rgba(168, 85, 247, 0.2) !important;    color: #d8b4fe !important; }

/* Generic bg utility overrides */
.bg-dark  { background-color: #000 !important; }
.bg-light { background-color: var(--ui-surface-elevated) !important; }

/* Defeat Bootstrap text-dark inside badges/containers — let parent decide */
.badge.text-dark, .badge.text-light { color: inherit !important; }
.text-dark { color: var(--ui-text) !important; }

/* ---- Dropdowns ----------------------------------------------------------- */
.dropdown-menu {
  background-color: var(--ui-surface-elevated) !important;
  border: 1px solid var(--ui-border) !important;
  border-radius: var(--ui-radius) !important;
  box-shadow: var(--ui-shadow-lg) !important;
  padding: 0.375rem !important;
  color: var(--ui-text);
}
.dropdown-item {
  color: var(--ui-text) !important;
  font-size: 0.875rem !important;
  padding: 0.5rem 0.75rem !important;
  border-radius: var(--ui-radius-sm) !important;
  transition: background-color 0.1s ease;
}
.dropdown-item:hover, .dropdown-item:focus {
  background-color: var(--ui-surface-hover) !important;
  color: var(--ui-text) !important;
}
.dropdown-item-text { color: var(--ui-text-muted) !important; }

/* ---- Quick action buttons (dashboard) ------------------------------------ */
.quick-action-btn {
  background-color: var(--ui-surface-elevated) !important;
  border: 1px solid var(--ui-border) !important;
  color: var(--ui-text) !important;
  border-radius: var(--ui-radius-lg) !important;
  box-shadow: var(--ui-shadow-sm) !important;
}
.quick-action-btn:hover {
  background-color: var(--ui-accent) !important;
  border-color: var(--ui-accent) !important;
  color: var(--ui-accent-text) !important;
  transform: translateY(-1px);
}
.quick-action-btn .quick-action-icon { color: inherit !important; }

/* ---- Collapsible header (custom .collapsible-header-styling) ------------- */
.collapsible-header-styling {
  background-color: var(--ui-surface-elevated) !important;
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius);
  color: var(--ui-text) !important;
  padding: 0.875rem 1rem !important;
  transition: background-color 0.15s ease;
}
.collapsible-header-styling:hover { background-color: var(--ui-surface-hover) !important; }

/* ---- Empty-state placeholder -------------------------------------------- */
.emptytable {
  color: var(--ui-text-muted);
  border-color: var(--ui-border) !important;
  background-color: var(--ui-surface);
  border-radius: var(--ui-radius);
}

/* ---- Order totals & task cards ------------------------------------------ */
.order-totals-container {
  background-color: var(--ui-surface-elevated) !important;
  border-color: var(--ui-border) !important;
  color: var(--ui-text) !important;
  border-radius: var(--ui-radius);
}
.order-totals-container hr { border-top-color: var(--ui-border) !important; }
.order-total { color: var(--ui-success-fg); }

.task-card {
  background-color: var(--ui-surface) !important;
  border-color: var(--ui-border) !important;
  color: var(--ui-text);
  border-radius: var(--ui-radius);
}

/* HDH text utility classes — keep semantic colors but tuned for dark */
.text-hdh-green { color: var(--ui-success-fg) !important; }
.text-hdh-red   { color: var(--ui-danger-fg) !important; }
.text-hdh-black { color: var(--ui-text) !important; }

/* ---- Login page --------------------------------------------------------- */
.login-container { background-color: var(--ui-bg) !important; }
.login-card {
  background-color: var(--ui-surface) !important;
  border: 1px solid var(--ui-border);
  box-shadow: var(--ui-shadow-lg);
  border-radius: var(--ui-radius-lg);
}
.login-header h1 { color: var(--ui-text) !important; }

/* ---- Modal -------------------------------------------------------------- */
.modal-content {
  background-color: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  color: var(--ui-text);
  border-radius: var(--ui-radius-lg);
}
.modal-header { border-bottom-color: var(--ui-border) !important; }
.modal-footer { border-top-color: var(--ui-border) !important; }

/* ---- Select2 (overrides existing) --------------------------------------- */
.select2-container--default .select2-selection--single {
  background-color: var(--ui-bg) !important;
  border: 1px solid var(--ui-border-strong) !important;
  color: var(--ui-text) !important;
  height: 38px !important;
  border-radius: var(--ui-radius-sm) !important;
}
.select2-container--default .select2-selection--single .select2-selection__rendered {
  color: var(--ui-text) !important;
  line-height: 38px !important;
}
.select2-container--default .select2-selection--single .select2-selection__placeholder {
  color: var(--ui-text-subtle) !important;
}
.select2-dropdown {
  background-color: var(--ui-surface-elevated) !important;
  border-color: var(--ui-border) !important;
  color: var(--ui-text) !important;
  border-radius: var(--ui-radius-sm) !important;
}
.select2-search--dropdown .select2-search__field {
  background-color: var(--ui-surface) !important;
  border: 1px solid var(--ui-border) !important;
  color: var(--ui-text) !important;
  border-radius: var(--ui-radius-sm) !important;
}
.select2-results__option { color: var(--ui-text) !important; }
.select2-results__option--highlighted[aria-selected],
.select2-results__option--highlighted {
  background-color: var(--ui-surface-hover) !important;
  color: var(--ui-text) !important;
}

/* ---- Bootstrap-JS compat shim ------------------------------------------- */
/* These rules let Bootstrap JS components keep working visually after we
   eventually drop Bootstrap CSS. Kept here so they're already in place. */
.collapse:not(.show) { display: none !important; }
.collapsing { transition: height 0.35s ease; overflow: hidden; }
.fade { transition: opacity 0.15s linear; }
.fade:not(.show) { opacity: 0; }

/* ---- Misc polish -------------------------------------------------------- */
::selection { background-color: rgba(255, 255, 255, 0.2); color: var(--ui-text); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--ui-bg); }
::-webkit-scrollbar-thumb {
  background: var(--ui-border-strong);
  border-radius: var(--ui-radius-sm);
}
::-webkit-scrollbar-thumb:hover { background: var(--ui-text-subtle); }

/* Required-invalid override from style.css uses red — already styled above.
   Override the !important rule from style.css explicitly. */
input[required]:invalid,
select[required]:invalid,
textarea[required]:invalid {
  border-color: rgba(239, 68, 68, 0.7) !important;
}

/* ---- HDH logo on dark theme --------------------------------------------- */
/* The brand logo PNG is black-on-transparent — invisible on the dark sidebar
   and login card. Invert it via CSS so it reads as white-on-dark. The
   gemini.png illustration is intentionally NOT targeted (it has color and
   would invert badly), only the HDH wordmark logo. */
.logo, .login-logo {
  filter: invert(1) brightness(0.92);
}

/* ---- Login page polish (when login.html opts into theme.css) ------------ */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
}
.login-card {
  width: 100%;
  max-width: 420px;
  padding: 2rem 2rem 1.75rem;
  text-align: left;
}
.login-card .login-logo {
  display: block;
  width: 70%;
  margin: 0 auto 1.75rem;
}
.login-card form .form-group + .form-group { margin-top: 0.875rem; }
.login-card .btn-primary { width: 100%; margin-top: 0.5rem; padding: 0.6rem 1rem; font-size: 0.9375rem; }
.login-card .input-group .btn { background-color: var(--ui-bg) !important; border: 1px solid var(--ui-border-strong) !important; }
.login-card .input-group .btn i { color: var(--ui-text-muted) !important; }
.login-card .form-check { margin-top: 0.75rem; }