/* ==========================================================================
   Navigation — bottom tab bar and drawer.

   Loaded LAST, after app-ui.css and native.css. Those two also style
   `.bottom-nav` / `.sidebar-nav-item`, and at equal specificity the later
   sheet wins — putting the redesign anywhere earlier meant fighting them with
   escalating selectors. One file, loaded last, is the whole cascade story.
   ========================================================================== */

/* ==========================================================================
   Bottom tab bar

   Selection is shown with a short indicator bar on the top edge plus a colour
   shift, not a filled blob behind the glyph — at six tabs a solid circle on
   one of them dominated the whole bar.
   ========================================================================== */

.bottom-nav {
  position: fixed;
  inset-block-end: 0;
  inset-inline: 0;
  z-index: var(--z-nav);
  display: none;
  align-items: stretch;
  gap: 0;
  padding-block: 0;
  padding-block-end: var(--safe-bottom);
  padding-inline: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: none;
  border-block-start: 1px solid var(--border-color);
  box-shadow: none;
}

@media (max-width: 768px) {
  .bottom-nav { display: flex; }
}

.nav-item {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding-block: var(--space-3) var(--space-2);
  border-radius: 0;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

/* Indicator bar, drawn on the top edge of the active tab. */
.nav-item::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 50%;
  transform: translateX(50%) scaleX(0);
  width: 26px;
  height: 3px;
  border-radius: 0 0 var(--radius-full) var(--radius-full);
  background: var(--primary-color);
  transition: transform var(--transition-fast);
}

.nav-item.active::before { transform: translateX(50%) scaleX(1); }

.nav-icon-pill {
  display: grid;
  place-items: center;
  width: auto;
  height: 24px;
  background: none;
  border-radius: 0;
  transition: transform var(--transition-fast);
}

.nav-icon {
  font-size: 1.25rem;
  line-height: 1;
  width: auto;
  height: auto;
  background: none;
  margin: 0;
}

.nav-label {
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  letter-spacing: -0.01em;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item:hover { color: var(--text-secondary); }

.nav-item.active { color: var(--primary-color); }
.nav-item.active .nav-label { font-weight: var(--weight-bold); }

.nav-item:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.nav-item:active .nav-icon-pill { transform: scale(0.9); }

/* ==========================================================================
   Drawer
   ========================================================================== */

.sidebar-logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-5);
  padding-inline: var(--space-5);
  border-block-end: 1px solid var(--border-color);
  background: none;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.sidebar-brand-mark {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(var(--primary-rgb), 0.12);
  color: var(--primary-color);
  font-size: 1.1rem;
}

.sidebar-logo-text {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  color: var(--text-color);
  line-height: 1.2;
  white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3) var(--space-4);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.sidebar-group + .sidebar-group {
  margin-block-start: var(--space-5);
}

.sidebar-group-title {
  padding-inline: var(--space-3);
  margin-block-end: var(--space-2);
  font-size: var(--text-2xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.sidebar-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 46px;
  margin-block-end: 2px;
  padding-block: var(--space-2);
  padding-inline: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

/* Icons are plain glyphs at a fixed width, so the labels line up without the
   list turning into a column of coloured tiles. */
.sidebar-nav-icon {
  flex: 0 0 auto;
  width: 24px;
  display: grid;
  place-items: center;
  background: none;
  border-radius: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
  transition: color var(--transition-fast);
}

.sidebar-nav-label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--text-md);
  font-weight: var(--weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav-item:hover {
  background: var(--surface-2);
  color: var(--text-color);
}

.sidebar-nav-item:hover .sidebar-nav-icon { color: var(--text-secondary); }

.sidebar-nav-item:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.sidebar-nav-item.active {
  background: rgba(var(--primary-rgb), 0.1);
  color: var(--primary-dark);
}

.sidebar-nav-item.active .sidebar-nav-label { font-weight: var(--weight-bold); }
.sidebar-nav-item.active .sidebar-nav-icon { color: var(--primary-color); }

/* The old edge marker is redundant next to the filled row. */
.sidebar-nav-item.active::before { content: none; }

.sidebar-footer {
  padding: var(--space-4);
  border-block-start: 1px solid var(--border-color);
  text-align: center;
}

.sidebar-version {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

@media (prefers-reduced-motion: reduce) {
  .nav-item,
  .nav-item::before,
  .nav-icon-pill,
  .sidebar-nav-item,
  .sidebar-nav-icon {
    transition: none;
  }
}