/* Mobile navigation: keep the dropdown attached to the fixed header. */
@media (max-width:1220px) {
  .site-header { background:#0c0d0f; -webkit-backdrop-filter:none; backdrop-filter:none; }
  .site-header .mobile-menu { position:static; }
  .site-header .mobile-menu > summary { position:relative; z-index:2; touch-action:manipulation; }
  .site-header .mobile-menu nav {
    position:absolute; top:100%; right:0;
    max-height:calc(100vh - var(--header));
    max-height:calc(100dvh - var(--header));
    overflow-y:auto; overscroll-behavior:contain; -webkit-overflow-scrolling:touch;
  }
  .mobile-menu[open] > summary span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
  .mobile-menu[open] > summary span:nth-child(2) { opacity:0; }
  .mobile-menu[open] > summary span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }
}