website/static/src/scss/_blocks.scss

@mixin center-block($width: 85%, $mobile-width: 90%) {
  width: $width;
  margin: 0 auto;

  max-width: $width;
  min-width: $width;

  @include touch {
    max-width: $mobile-width;
    min-width: $mobile-width;
    width: $mobile-width;
  }
}

div.block-image {
  figcaption {
    font-size: 85%;
    margin-top: 5px;
  }

  figure {
    @include center-block;
  }
}

.content > div[class^="block-"] {
  &:not(:last-child) {
    margin-bottom: $content-block-margin-bottom;
  }
}

div.block-embed {
  lite-youtube {
    @include center-block(50%);
  }
}