/* ============================================================
   Valet Design System — Navigation Pattern
   Requires: base-tokens.css, client-tokens.css, app-shell.css

   Sidebar navigation for portal/dashboard apps.
   Works inside .shell-sidebar and .shell-drawer.

   Anatomy:
     .nav-group         optional labelled section
     .nav-group-label   section heading
     .nav-item          single nav link
     .nav-item-icon     icon slot
     .nav-item-label    link text
     .nav-item-badge    count/status indicator
   ============================================================ */

/* ── Nav group ───────────────────────────────────────────── */
.nav-group + .nav-group {
  margin-block-start: var(--space-6);
}

.nav-group-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-inline: var(--space-3);
  margin-block-end: var(--space-2);
}

/* ── Nav item ────────────────────────────────────────────── */
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: background-color 120ms ease, color 120ms ease;
  cursor: pointer;
  border: none;
  background: none;
  inline-size: 100%;
  text-align: start;
}

.nav-item:hover {
  background-color: color-mix(in oklch, var(--color-primary) 6%, transparent);
  color: var(--color-text);
}

.nav-item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Active state */
.nav-item[aria-current="page"],
.nav-item.is-active {
  background-color: color-mix(in oklch, var(--color-primary) 10%, transparent);
  color: var(--color-primary);
  font-weight: 600;
}

/* ── Icon ────────────────────────────────────────────────── */
.nav-item-icon {
  inline-size: 1.125rem;
  block-size: 1.125rem;
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item:hover .nav-item-icon,
.nav-item.is-active .nav-item-icon,
.nav-item[aria-current="page"] .nav-item-icon {
  opacity: 1;
}

/* ── Label ───────────────────────────────────────────────── */
.nav-item-label {
  flex: 1;
  min-inline-size: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Badge (count / status) ──────────────────────────────── */
.nav-item-badge {
  margin-inline-start: auto;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-inline-size: 1.25rem;
  block-size: 1.25rem;
  padding-inline: var(--space-1);
  border-radius: var(--radius-full);
  background-color: color-mix(in oklch, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1;
}

/* ── Sub-navigation ──────────────────────────────────────── */
.nav-sub {
  padding-inline-start: calc(var(--space-3) + 1.125rem + var(--space-3));
  margin-block-start: var(--space-1);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-sub .nav-item {
  font-size: var(--text-xs);
  font-weight: 400;
  padding-block: var(--space-1);
}

.nav-sub .nav-item.is-active,
.nav-sub .nav-item[aria-current="page"] {
  font-weight: 500;
}

/* ── Mobile menu toggle button ───────────────────────────── */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 2.25rem;
  block-size: 2.25rem;
  border-radius: var(--radius-md);
  border: none;
  background: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  transition: background-color 120ms ease;
}

.nav-toggle:hover {
  background-color: color-mix(in oklch, var(--color-primary) 8%, transparent);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}