.photos
  .photo
    float: left
    margin-right: 1em
    margin-top: 1em
  &:after
    content: ""
    display: block
    clear: both

ul.categories
  list-style: none
  border: 1px solid #ccc
  border-radius: 3px
  box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.1)
  margin-top: 1em
  padding: 1em
  width: 25%
  float: right