stack.css.sass

body
  background: #929292
  font-family: "Helvetica Neue"
  margin: auto
  width: 1280px

a
  color: steelblue

a:not(:hover)
  text-decoration: none

.stack
  background: #fff
  box-shadow: 0px 4px 8px rgba(0,0,0,.5)
  display: none
  font-size: 36px
  height: 640px
  line-height: 1.5em
  margin-bottom: 40px
  padding: 40px
  width: 1200px
  -webkit-transform: translate3d(0,0,0)

.active
  display: block
  position: fixed

h1 
  font-size: 72px
  margin-top: 0

.big h1
  text-align: center
  margin-top: 300px
  font-size: 256px

.bottom
  position: absolute
  bottom: 0

@media screen and (-webkit-min-device-pixel-ratio: 2), screen and (min-device-width: 768px) and (max-device-width: 1024px), screen and (max-device-width: 480px)
  body
    margin: 40px auto 40px auto

  .stack
    display: block