/* =============================================================================
   Layout — app shell, sidebar, page header, grid utilities.
   The shell is a CSS Grid, so the sidebar and content stay aligned without
   margin hacks. The :has() selector adapts the column when the sidebar
   collapses, replacing the JS toggling of margin-left.
   ============================================================================= */

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* App shell ---------------------------------------------------------------- */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100svh;
  background: var(--surface-canvas);
  /* Animate the column in lock-step with the sidebar's own width transition so
     collapse/expand glides instead of the track snapping under it. Both fixed
     tracks are interpolable in modern engines; older ones just snap (as before). */
  transition: grid-template-columns var(--duration-base) var(--ease-emphasized);
}

/* :has() lets the layout react to sidebar state without a JS class on body. */
.app-layout:has(.sidebar.collapsed) {
  grid-template-columns: var(--sidebar-collapsed) 1fr;
}

/* Sidebar ------------------------------------------------------------------ */
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100svh;
  width: 100%;
  background:
    linear-gradient(180deg,
      oklch(0.245 0.070 260) 0%,
      oklch(0.180 0.055 260) 100%);
  color: var(--text-inverse);
  padding-block: var(--space-5);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 100;
  transition: width var(--duration-base) var(--ease-emphasized);
  border-right: 1px solid oklch(1 0 0 / 0.06);
  scrollbar-width: thin;
  scrollbar-color: oklch(1 0 0 / 0.18) transparent;
}

/* Keep the sidebar's light-on-dark scrollbar in WebKit too (the global
   gray thumb in reset.css would otherwise show through on the navy panel). */
.sidebar::-webkit-scrollbar-thumb {
  background: oklch(1 0 0 / 0.18);
  border: none;
}
.sidebar::-webkit-scrollbar-thumb:hover { background: oklch(1 0 0 / 0.30); }

.sidebar-brand {
  padding-inline: var(--space-5);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.sidebar-brand-text {
  flex: 1;
  min-width: 0;
}

.sidebar-brand h1 {
  font-size: 1.05rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 1px 2px oklch(0 0 0 / 0.25);
}

.sidebar-brand p {
  font-size: var(--text-xs);
  opacity: 0.55;
  margin-top: var(--space-1);
}

/* User chip */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
}

.sidebar-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-pill);
  background: oklch(1 0 0 / 0.08);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: var(--weight-bold);
  flex-shrink: 0;
  color: #fff;
  box-shadow: inset 0 0 0 1px oklch(1 0 0 / 0.18);
}

.sidebar-user-info { min-width: 0; }

.sidebar-user-name {
  font-size: 0.875rem;
  font-weight: var(--weight-semibold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #fff;
}

.sidebar-user-role {
  font-size: 0.6875rem;
  opacity: 0.55;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.sidebar-divider {
  height: 1px;
  background: oklch(1 0 0 / 0.07);
  margin: var(--space-3) var(--space-5);
}

/* Navigation --------------------------------------------------------------- */
.sidebar-nav {
  flex: 1 1 auto;
  padding-block: var(--space-1);
}

.nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.75;
}

/* One rule for every "row" in the sidebar — nav links, admin links, footer
   actions, the change-password button. Keeps them visually consistent. */
.sidebar-nav a,
.sidebar-nav-btn,
.sidebar-admin-section a,
.sidebar-action-btn {
  --row-color: oklch(1 0 0 / 0.78);
  --row-bg: transparent;
  --row-bar: transparent;

  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 9px var(--space-4);
  margin: 2px var(--space-3);
  font-size: 0.875rem;
  font-weight: var(--weight-medium);
  color: var(--row-color);
  background: var(--row-bg);
  border-radius: var(--radius-md);
  border-left: 2px solid var(--row-bar);
  transition:
    background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    border-left-color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.sidebar-nav a:hover,
.sidebar-nav-btn:hover,
.sidebar-admin-section a:hover,
.sidebar-action-btn:hover {
  --row-color: #fff;
  --row-bg: oklch(1 0 0 / 0.07);
  transform: translateX(1px);
}

.sidebar-nav a.active,
.sidebar-admin-section a.active {
  --row-color: #fff;
  --row-bg: oklch(1 0 0 / 0.12);
  --row-bar: oklch(0.85 0.10 80); /* brass accent — quiet, finance-feel */
  font-weight: var(--weight-semibold);
}

.sidebar-nav a.active .nav-icon,
.sidebar-admin-section a.active .nav-icon {
  opacity: 1;
}

/* Section headings — group nav rows by item type. */
.sidebar-nav-heading {
  padding: var(--space-3) var(--space-4) var(--space-1);
  margin: 0 var(--space-3);
  font-size: 0.6875rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: oklch(1 0 0 / 0.42);
  user-select: none;
}

/* Footer ------------------------------------------------------------------- */
.sidebar-footer {
  padding: var(--space-3) var(--space-4);
  margin-top: auto;
}

.sidebar-lang {
  display: flex;
  gap: 4px;
  margin-bottom: var(--space-3);
}

.sidebar-lang-btn {
  flex: 1;
  padding: 6px 0;
  font-size: 0.6875rem;
  font-weight: var(--weight-semibold);
  text-align: center;
  border: 1px solid oklch(1 0 0 / 0.14);
  background: transparent;
  color: oklch(1 0 0 / 0.55);
  border-radius: var(--radius-md);
  cursor: pointer;
  letter-spacing: var(--tracking-wide);
  transition:
    background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}

.sidebar-lang-btn:hover {
  background: oklch(1 0 0 / 0.08);
  color: oklch(1 0 0 / 0.85);
}

.sidebar-lang-btn.active {
  background: oklch(1 0 0 / 0.14);
  color: #fff;
  border-color: oklch(1 0 0 / 0.22);
}

.sidebar-user-actions {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* Brand-row collapse button */
.sidebar-collapse-btn {
  background: none;
  border: none;
  padding: 5px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0.5;
  transition:
    opacity var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard);
  flex-shrink: 0;
  display: grid;
  place-items: center;
}

.sidebar-collapse-btn:hover {
  opacity: 1;
  background: oklch(1 0 0 / 0.10);
}

.sidebar-collapse-btn .nav-icon {
  width: 18px;
  height: 18px;
  opacity: 1;
  color: #fff;
}

/* Cross-surface focus ring for the dark sidebar — white outline so it reads
   against the navy gradient (the brand-colored default would be too dark). */
.sidebar :focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Collapsed sidebar -------------------------------------------------------- */
.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

.sidebar.collapsed .sidebar-brand-text,
.sidebar.collapsed .sidebar-user-info,
.sidebar.collapsed .sidebar-nav a span,
.sidebar.collapsed .sidebar-admin-section a span,
.sidebar.collapsed .sidebar-action-btn span,
.sidebar.collapsed .sidebar-nav-btn span,
.sidebar.collapsed .sidebar-nav-heading span,
.sidebar.collapsed .sidebar-lang-btn { display: none; }

/* Collapsed: headings have no room for text — render each as a thin divider
   so the type-based grouping stays visible. */
.sidebar.collapsed .sidebar-nav-heading {
  height: 1px;
  padding: 0;
  margin: var(--space-2) var(--space-3);
  background: oklch(1 0 0 / 0.07);
}

.sidebar.collapsed .sidebar-brand { justify-content: center; padding-inline: var(--space-2); }
.sidebar.collapsed .sidebar-user { flex-direction: column; align-items: center; gap: 0; padding: var(--space-2); }
.sidebar.collapsed .sidebar-divider { margin-inline: var(--space-2); }
.sidebar.collapsed .sidebar-footer { padding: var(--space-2); }
.sidebar.collapsed .sidebar-nav a,
.sidebar.collapsed .sidebar-admin-section a,
.sidebar.collapsed .sidebar-action-btn,
.sidebar.collapsed .sidebar-nav-btn {
  justify-content: center;
  margin: 2px var(--space-2);
  padding: 9px;
  border-left: none;
}

.sidebar.collapsed .sidebar-collapse-btn svg { transform: rotate(180deg); }

/* Tooltips on collapsed nav rows. Now anchored to ALL row types. */
.sidebar.collapsed :is(.sidebar-nav a, .sidebar-admin-section a, .sidebar-action-btn, .sidebar-nav-btn) {
  position: relative;
}
.sidebar.collapsed :is(.sidebar-nav a, .sidebar-admin-section a, .sidebar-action-btn, .sidebar-nav-btn)::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  margin-left: 8px;
  padding: 5px 10px;
  background: var(--navy-900);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-standard);
  box-shadow: var(--elev-3);
  z-index: 200;
}
.sidebar.collapsed :is(.sidebar-nav a, .sidebar-admin-section a, .sidebar-action-btn, .sidebar-nav-btn):hover::after {
  opacity: 1;
}

/* Main content ------------------------------------------------------------- */
.main-content {
  /* container-type lets descendants use @container queries.
     This is what replaces most of responsive.css. */
  container-type: inline-size;
  container-name: main;

  padding: var(--gutter);
  min-width: 0; /* prevent grid blowout */
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.page-header h2 {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--text-brand);
  letter-spacing: var(--tracking-tight);
}

/* Grid system --------------------------------------------------------------
   Fluid auto-fit replaces rigid 2/3/4-column rules and makes media-query
   breakpoints unnecessary. Cards re-flow when the column gets too narrow.
   ------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr)); }

/* Container-query refinement: when main-content is tight, snap stat cards
   to two columns instead of leaving big gaps. */
@container main (max-width: 720px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@container main (max-width: 460px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Utilities ---------------------------------------------------------------- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.text-center { text-align: center; }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-muted { color: var(--text-muted); }

.hidden { display: none !important; }