openproject/app/assets/stylesheets/content/_grid_table.css.sass

=grid-item-columns($columns)
  width: 100% / 12 * $columns

.grid-items-lines
  $grid-items-background: $base-body-color
  $grid-item-background: $base-body-color
  $grid-item-border: 1px solid transparentize($base-font-color, 0.8)
  $grid-item-columns: 4
  $grid-item-big-columns: 8
  $grid-item-color: $base-font-color
  $grid-item-height: 14em
  +clearfix
  position: relative

  .grid-item
    +transition(all 0.2s ease-in-out)
    height: $grid-item-height
    background: $grid-item-background
    width: 100%
    overflow: hidden
    float: left
    padding: 2em
    border-right: $grid-item-border
    border-bottom: $grid-item-border
    cursor: pointer
    //+media($large-screen)
    +grid-item-columns($grid-item-columns)

    &:hover
      background: transparentize($grid-item-color, 0.95)

  .grid-item img
    display: block
    height: 2.5em
    margin-bottom: 1.2em
    opacity: .2
  .grid-item h1
    color: $grid-item-color
    font-size: 1.3em
    margin-bottom: .4em
  .grid-item p
    color: transparentize($grid-item-color, 0.4)
    //+media($medium-screen)
      max-width: 70%
  .grid-item-big
    //+media($large-screen)
      +grid-item-columns($grid-item-big-columns)

    p
      //+media($medium-screen)
        max-width: 60%

  // this, below, might not be the most beautiful solution but it removes the outer borders by using the background color.
  .bottom-cover
    position: absolute
    bottom: 0px
    width: 100%
    height: 3px
    background: $grid-items-background
  .right-cover
    position: absolute
    right: 0px
    height: 100%
    width: 4px
    background: $grid-items-background