html { scroll-padding-top: 92px; }

.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  max-width: none;
  padding-left: max(28px, calc((100vw - 1220px) / 2));
  padding-right: max(28px, calc((100vw - 1220px) / 2));
  background: transparent;
  border-bottom: 1px solid transparent;
  box-shadow: none;
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  transition: background-color .3s ease, border-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
}

.site-header.is-scrolled {
  background: rgba(3, 16, 30, .86);
  border-bottom-color: rgba(255, 255, 255, .09);
  box-shadow: 0 8px 35px rgba(0, 0, 0, .18);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

@media (max-width: 850px) {
  html { scroll-padding-top: 78px; }
  .site-header { padding-left: 20px; padding-right: 20px; }
}