/* Safari: blur/backdrop-filter on a sticky ancestor can visibly jitter while the browser chrome moves. */
.nav-shell{
  -webkit-backdrop-filter:none!important;
  backdrop-filter:none!important;
  transform:none!important;
  -webkit-transform:none!important;
  will-change:auto!important;
}
.nav-glass{
  -webkit-backdrop-filter:none!important;
  backdrop-filter:none!important;
}

/* Keep every moving layer inside the fixed-size capsule. */
.nav-glass::after{
  contain:paint;
}