body[data-page="home"] .site-header { position: absolute; top: 0; width: 100%; background: linear-gradient(180deg, rgba(7,9,7,.94), rgba(7,9,7,.48)); }

@media (max-width: 900px) {
  body[data-page="home"] .site-header { position: sticky; background: rgba(12,15,13,.97); }
}