sass-site/source/assets/css/components/_callouts.scss

.sl-c-callout {
  margin: 1.5rem 0;
  padding: 1.5rem 1rem;
  background: lighten($sl-color--pale-sky, 50%);
  border-radius: 2px;

  &--warning {
    background: lighten($sl-color--hopbush, 36%);
    border: 1px solid lighten($sl-color--hopbush, 27%);
  }

  &--fun-fact {
    background: lighten($sl-color--patina, 43%);
    border: 1px solid lighten($sl-color--patina, 32%);
  }

  &--function {
    padding: {
      top: 0;
      bottom: .25rem;
    };

    .signature {
      // Make sure permalinks are visible.
      overflow: visible;

      margin: {
        right: -1rem;
        left: -1rem;
      };
    }
  }

  &--impl-status {
    font-size: 0.8em;
    margin-top: -1rem;
    padding: 0.8rem;

    .sl-c-callout & {
      background: lighten($sl-color--pale-sky, 53%);
    }
  }

  > *:first-child { margin-top: 0; }

  > *:last-child { margin-bottom: 0; }
}