html, body
  height: 100%

body
  font: 16px tahoma,arial,"Hiragino Sans GB","Microsoft Yahei"
  line-height: 1.5
  background: #eee
  
.container
  max-width: 970px
  background: #fff

.posts
  font-size: 16px
  margin: 1em auto
  max-width: 620px
  padding-bottom: 2em
  
  .post
    .dt 
      font-size: 11px
      color: #bbb
    hr
      border-top: 1px solid #ccc

.navbar
  margin-bottom: 0


#header
  margin: 1em auto
  text-align: center

#nav
  text-align: center

  .cats
    width: 80%
    font-size: 18px
    text-align: center
    margin: 1em auto

#footer
  margin: 1em auto
  text-align: center

#show-background-trigger
  display: block
  cursor: pointer
  padding: 10px
  width: 50px
  height: 50px
  line-height: 30px
  margin: 0 auto
  background: #eee
  text-align: center
  border: 1px splid #bbb

#show-background-trigger:hover
  background: #bbb