/* A disclosure menu for narrow phones. Existing desktop navigation is retained. */
.mobile-menu-toggle,
.mobile-menu { display: none; }

@media (max-width: 479px) {
  .site-header .shell { gap: 0.5rem; }
  .site-header .brand { min-height: 48px; gap: 0.4rem; }
  .site-header .brand span { font-size: 0.9rem; }
  .site-header .header-nav { margin-left: auto; }
  .site-header .theme-toggle { min-height: 48px; min-width: 48px; padding-inline: 0.6rem; }
  .mobile-menu-toggle:not([hidden]) {
    display: inline-flex; align-items: center; justify-content: center;
    width: 48px; min-width: 48px; min-height: 48px;
    padding: 0; border: var(--border); border-radius: var(--radius-sm);
    background: var(--panel); color: var(--ink); cursor: pointer;
  }
  .mobile-menu:not([hidden]) {
    display: block; position: absolute; top: 100%; left: 0; right: 0;
    max-height: calc(100vh - 4.25rem); max-height: calc(100dvh - 4.25rem);
    overflow-y: auto; overscroll-behavior: contain;
    padding: 0.75rem; border-bottom: var(--border);
    background: var(--panel); color: var(--ink); box-shadow: var(--shadow);
  }
  .mobile-menu-heading { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
  .mobile-menu-heading strong { font-size: var(--step--1); }
  .mobile-menu-close {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    min-height: 48px; min-width: 72px; padding: 0.5rem 0.75rem;
    border: var(--border); border-radius: var(--radius-sm); background: var(--panel);
    color: var(--ink); font: inherit; cursor: pointer;
  }
  .mobile-menu ul { list-style: none; padding: 0; margin: 0.5rem 0 0; }
  .mobile-menu li { margin: 0; }
  .mobile-menu a {
    display: flex; align-items: center; min-height: 48px; padding: 0.65rem 0.75rem;
    border-radius: var(--radius-sm); color: var(--ink); text-decoration: none;
    overflow-wrap: anywhere;
  }
  .mobile-menu a:hover, .mobile-menu a[aria-current="page"] { background: var(--stock); }
}

@media print { .mobile-menu, .mobile-menu-toggle { display: none !important; } }