/* Empty mounts collapse. No labels, borders, or reserved boxes. */
.ad-mount:not(.is-ready),
.ad-mount:empty,
.ad-mount[aria-hidden="true"] {
  display: none;
  height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
}
.ad-mount.is-ready {
  display: block;
  margin: 16px auto;
  max-width: 1100px;
  padding: 0 20px;
}