codecombat/app/styles/play/level/loading.sass

@import "app/styles/bootstrap/mixins"
@import "app/styles/mixins"

@mixin sky-background($url: '', $backgroundPosition: left)
  $top: #95D9EF
  $mid: #FFFFFF
  $bot: #8EC643
  $stop: 99.6%
  background: $mid
  background-image: url($url)  // fallback
  background-image: url($url), -webkit-linear-gradient(top, $top, $mid $stop, $bot)
  background-image: url($url),     -ms-linear-gradient(top, $top, $mid $stop, $bot)
  background-image: url($url),         linear-gradient(to bottom, $top, $mid $stop, $bot)
  background-repeat: no-repeat
  background-position: top $backgroundPosition
  background-size: contain

#level-loading-view
  color: blue
  width: 100%
  height: 100%
  position: absolute
  z-index: 20
  $UNVEIL_TIME: 1.2s
  pointer-events: none
  
  .loading-details
    position: absolute
    top: 20px
    left: 50%
    $WIDTH: 1000px
    width: $WIDTH
    margin-left: (-$WIDTH / 2)
    z-index: 100
    background-color: rgba(220, 255, 230, 0.6)
    color: darkslategray
    font-size: 15px
    border-radius: 30px
    padding: 10px
    text-align: center
    // http://matthewlein.com/ceaser/  Bounce down a bit, then snap up.
    -webkit-transition: top $UNVEIL_TIME cubic-bezier(0.285, 0, 0.670, 0)
    -webkit-transition: top $UNVEIL_TIME cubic-bezier(0.285, -0.595, 0.670, -0.600)
    -moz-transition: top $UNVEIL_TIME cubic-bezier(0.285, -0.595, 0.670, -0.600)
    -o-transition: top $UNVEIL_TIME cubic-bezier(0.285, -0.595, 0.670, -0.600)
    transition: top $UNVEIL_TIME cubic-bezier(0.285, -0.595, 0.670, -0.600)

    .load-progress
      position: absolute
      left: 2%
      top: 0px
      opacity: 0.6
      width: 96%
      margin: 10px auto 0

      .progress-bar
        width: 1%
        transition-duration: 1.2s
        
    #tip-wrapper
      position: relative
      z-index: 2

  .left-wing, .right-wing
    width: 100%
    height: 100%
    position: absolute

  .left-wing
    @include sky-background('/images/level/loading_left_wing.png', right)
    left: -50%
    transition: all $UNVEIL_TIME ease

  .right-wing
    @include sky-background('/images/level/loading_right_wing.png', left)
    right: -50%
    transition: all $UNVEIL_TIME ease