www.netz39.de/_sass/includes/_post_nav.scss

#post-nav {
  width: 100%;
  display: inline-block;
  @extend %padding-nav;

  a {
    width: 100%;
    padding: 0;
    margin: 0;
  }

  p {
    @extend .meta;
  }

  #previous-post {
    float: left;
    width: 50%;
  }

  #next-post {
    float: right;
    text-align: right;
    width: 50%;
  }

  @media screen and (max-width: $sm-break) {
    a, p {
      font-size: 0.8em;
    }
  }
}