.page {
  overflow: visible;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  box-shadow: 0 10px 22px rgba(0, 0, 0, .72);
}

.main-nav {
  position: relative;
  top: auto;
}

@media (max-width: 620px) {
  .site-header {
    padding-bottom: 6px;
  }
}