.shh-sticky{will-change:transform, top;}
.shh-shadow{box-shadow:0 8px 24px rgba(0,0,0,.08);}
/* Avoid content jumping under fixed header when anchor links are clicked */
:target:before{
  content:'';
  display:block;
  height:60px; /* adjusted dynamically by spacer in JS, this is just a small helper */
  margin-top:-60px;
}