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HTML

              
                .nav
  .title
    |Incoming
    span  Messages
  a.fontawesome-comment.active
    span New
    .bubble 10
  a.fontawesome-flag
    span Priority
    .bubble 8
  a.fontawesome-user
    span Assigned
    .bubble 0/17
  a.fontawesome-folder-close
    span Archived
    .bubble 3
  a.fontawesome-trash
    span Deleted
    .bubble 9
  a Show All
              
            
!

CSS

              
                /* vars */
light-gray = #d2d5d9
gray = #4a4f56
gray-highlight = #6d7580
padding = 1em
radius = 4px

@import url(http://weloveiconfonts.com/api/?family=fontawesome)

/* zocial */
[class*="fontawesome-"]:before
  font-family 'FontAwesome' sans-serif
  font-size 1.3em
  margin-right 0.8em
  color light-gray
  
/* mixin */
item()
  box-sizing border-box
  position relative
  display block
  padding padding
active()
  background-color gray-highlight
  color white
  &:before
      color white
  .bubble
      border 0
      background red
      color white
  &::after
      arrow-right()
      content ''
      display block
      position absolute
      right -8px
      top 1.1em
arrow-right()
	width 0
	height 0
	border-top 8px solid transparent
	border-bottom 8px solid transparent
	border-left 8px solid gray-highlight
  
body
  font-family Arial, sans-serif
  font-size .9em
  background-color #f3f4f4
  
.nav
  color gray-highlight
  min-width 90px
  max-width 250px
  height 333px
  background-color white
  border 1px solid light-gray
  border-radius radius
  box-shadow 0 1px 2px rgba(0,0,0,.1)
  position absolute
  top 0
  right 0
  bottom 0
  left 0
  margin auto

a > span
  opacity 1
  transition opacity .3s
  
.nav > a
  item()
  border-bottom 1px solid light-gray
  &:last-child
      border-bottom 0
      border-radius 0 0 radius radius
  &:hover
      active()

a.active
    active()  

.nav > .title
  item()
  background-color gray
  color white
  font-weight 500
  border-radius radius radius 0 0
  
.bubble
  position absolute
  top 1.3em
  right padding
  font-size .8em
  color gray-highlight
  border 1px solid gray-highlight
  border-radius 10px
  padding 2px 5px
 
/* responsiveness */
@media (max-width: 180px)
    .title > span
        display none
    .nav > a > span
        opacity 0
        transition opacity .3s
              
            
!

JS

              
                /* 
Responsive Menu
Inspired by http://dribbble.com/shots/450349-Responsive-menu

Resize the window!
*/
              
            
!
999px

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