.entry-meta {
  display: none;
}

.nav-links {
  display: none;
}

.wp-block-embed__wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9の比率 */
  height: 0;
  overflow: hidden;
}

.wp-block-embed__wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}