article.post {
  margin: 20px 0;

  & + & {
    padding-top: 20px;
    border-top: 1px dotted color(gray-bone);
  }
}

article.post {
  margin: 20px 0;

  & > header {
    margin-bottom: 20px;
  }

  & + & {
    padding-top: 20px;
    border-top: 1px dotted color(gray-bone);
  }
}

Add margin to the bottom of post headers.
Add margin to the bottom of post headers.
