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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              -var sites = [
-  'facebook',
-  'twitter',
-  'google',
-  'dribbble',
-  'skype'

  each site in sites
    a(href='#', class='btn ' + site)
      i(class='fa fa-' + site)

              // reset
@import '//'

btn-size = 90px
sites = {
  'facebook': #3B5998
  'twitter': #3CF
  'google': #DC4A38
  'dribbble': #F26798
  'skype': #00AFF0

$animate {
  transition: all .35s
  transition-timing-function: cubic-bezier(

$btn__inactive {
  &:before {
    top: 90%
    left: -110%
  .fa {
    transform: scale(.8)
  // variants
  for name, color in sites {
    &.{name} {
      &:before {
        background-color: color
      .fa {
        color: color

$btn__active {

  &:before {
    top: -10%
    left: -10%

  .fa {
    color: #fff
    transform: scale(1)

.social-btns {
  height: btn-size
  margin: auto
  font-size: 0
  text-align: center
  position: absolute
  top: 0
  bottom: 0
  left: 0
  right: 0

  .btn {
    @extends $btn__inactive
    @extends $animate
    display: inline-block
    background-color: #fff
    width: btn-size
    height: btn-size
    line-height: btn-size
    margin: 0 10px
    text-align: center
    position: relative
    overflow: hidden
    border-radius: 28%
    box-shadow: 0 5px 15px -5px rgba(0, 0, 0, 0.1)
    //overflow bug fix
    opacity: .99

    &:before {
      @extends $animate
      content: ''
      width: 120%
      height: 120%
      position: absolute
      transform: rotate(45deg)

    .fa {
      @extends $animate
      font-size: 38px
      vertical-align: middle

    &:hover {
      @extends $btn__active