/* One clearly separated manual unit below the page's main content. */
.site-ad {
  box-sizing: border-box;
  width: 100%;
  max-width: 728px;
  margin: 40px auto 24px;
  padding-top: 16px;
  border-top: 1px solid #dce2e8;
  text-align: center;
}
.site-ad-label {
  display: block;
  margin-bottom: 12px;
  color: #6b7280;
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .04em;
}
.site-ad-unit { display: block; }
@media (max-width: 600px) {
  .site-ad { margin-top: 32px; }
}