#main, .posts
  +outer-container

.posts p,  article.article-detail, .index-article
  +shift(2)
  +span-columns(8)

.soundcloud-player-small
  margin:
    top: $small-margin

.index-article
  margin:
    bottom: ($small-margin + $medium-margin)

.topic-list
  color: $medium-gray
  line-height: 1.8em

.post-title
  a
    color: darken($medium-gray, 30%)
    font-size: 1.7em

.posts, .article-detail
  p
    color: darken($medium-gray, 30%)
    font-size: 1.05em
    line-height: 1.35em
    margin:
      bottom: $medium-margin

.detail-post-date, .post-date
  color: $light-gray
  font-size: 0.6em

.post-date
  margin:
    left: em(-111px)
    right: em(12px)

#main, .posts
  +outer-container

.posts p,  article.article-detail, .index-article
  +shift(2)
  +span-columns(8)

.soundcloud-player-small
  margin:
    top: $small-margin

.index-article
  margin:
    bottom: ($small-margin + $medium-margin)

.topic-list
  color: $medium-gray
  line-height: 1.8em

.post-title
  a
    color: darken($medium-gray, 30%)
    font-size: 1.7em

.posts, .article-detail
  p
    color: darken($medium-gray, 30%)
    font-size: 1.05em
    line-height: 1.35em
    margin:
      bottom: $medium-margin

.detail-post-date, .post-date
  color: $light-gray
  font-size: 0.6em

.post-date
  margin:
    left: em(-111px)
    right: em(12px)
  +media(max-width 780px)
    display: block
    margin:
      left: em(0px)
      right: em(0px)
      bottom: $small-margin

Add media query for date on index list
Add media query for date on index list
