diaspora/app/assets/stylesheets/new_styles/_landing.scss

/* animations */
@-webkit-keyframes fly-in {
	0%   { @include opacity(0); margin-top : -600px; }
	100% { @include opacity(1); margin-top : 0; }
}
@-moz-keyframes fly-in {
	0%   { @include opacity(0); margin-top : -600px; }
	100% { @include opacity(1); margin-top : 0; }
}
@-ms-keyframes fly-in {
	0%   { @include opacity(0); margin-top : -600px; }
	100% { @include opacity(1); margin-top : 0; }
}

@-webkit-keyframes fly-out {
	0%   { @include opacity(1); margin-top : 0; }
    50%  { @include opacity(0); }
	100% { @include opacity(0); margin-top : 500px; }
}
@-moz-keyframes fly-out {
	0%   { @include opacity(1); margin-top : 0; }
	50%  { @include opacity(0); }
	100% { @include opacity(0); margin-top : 500px; }
}
@-ms-keyframes fly-out {
	0%   { @include opacity(1); margin-top : 0; }
	50%  { @include opacity(0); }
	100% { @include opacity(0); margin-top : 500px; }
}

/* le declarations */
#landing {
  overflow : hidden;
  position : absolute;
  min-height : 100%;
  width : 100%;
  top : 0;
  left : 0;

  color : #fff;

  background : {
    color : #2b2b2b;
    image : image_url('landing/background.jpg');
    size : cover;
    position : center;
  }

  #banner {
    @include box-shadow(0, 2px, 40px, rgba(0,0,0,0.8));

    position : relative;
    z-index : 8;

    text-align : center;
    font-family : Roboto-Light;
    padding : 50px 0;
    margin-bottom : 30px;
    background-color : rgba(0,0,0,0.6);

    h1, h3 { font-weight : 200; }

    h1 {
      font-size : 80px;
      line-height : 80px;
    }

    h3 {
      font-size : 24px;
      line-height : 24px;
      color : rgb(42,156,235);
    }

    #controls,
    .fb-like {
      z-index : 10;
      position : absolute;
      top : 10px;
    }

    .fb-like {
      left : 40px;
    }

    #controls {
      right : 10px;

      a:hover {
        text-decoration : none;
      }

      .label {
        @include transition(background-color);
        padding : 5px 4px;
        padding-bottom : 4px;
        margin-left : 8px;
      }


      .twitter-bird,
      .github-octocat {
        height : 20px;
        width : 20px;
        margin-top : -5px;
        margin-right : -2px;
      }
    }
  }

  #screens {
    /* hardware acceleration */
    -webkit-transform : translateZ(0);

    text-align : center;

    #s_container {
      display : inline-block;
      position : relative;
      height : 417px;
      width : 516px;

      img {
        position : absolute;
        z-index : 1;
        left : 0;
        top : 0;

        height : 417px;
        width : 516px;

        &:nth-child(1) {
          -webkit-animation : fly-in 1.2s;
             -moz-animation : fly-in 1.2s;
              -ms-animation : fly-in 1.2s;
        }

        &:nth-child(2) {
          -webkit-animation : fly-in 1s;
             -moz-animation : fly-in 1s;
              -ms-animation : fly-in 1s;
        }

        &:nth-child(3) {
          -webkit-animation : fly-in 0.8s;
             -moz-animation : fly-in 0.8s;
              -ms-animation : fly-in 0.8s;
        }

        &:nth-child(4) {
          -webkit-animation : fly-in 0.6s;
             -moz-animation : fly-in 0.6s;
              -ms-animation : fly-in 0.6s;
        }
      }

      &.outtatime {
        img {
          &:nth-child(1) {
            -webkit-animation : fly-out 1.2s;
               -moz-animation : fly-out 1.2s;
                -ms-animation : fly-out 0.6s;
          }

          &:nth-child(2) {
            -webkit-animation : fly-out 1s;
               -moz-animation : fly-out 1s;
                -ms-animation : fly-out 1s;

          }

          &:nth-child(3) {
            -webkit-animation : fly-out 0.8s;
               -moz-animation : fly-out 0.8s;
                -ms-animation : fly-out 0.8s;
          }

          &:nth-child(4) {
            -webkit-animation : fly-out 0.6s;
               -moz-animation : fly-out 0.6s;
                -ms-animation : fly-out 0.6s;
          }
        }
      }
    }
  }

  #sign_up {
    position : relative;
    z-index : 20;

    padding-top : 100px;
    color : rgb(255, 77, 54);

    h4 {
      font-size : 20px;
      line-height : 24px;
    }

    h2 {
      font-family : Roboto-Bold;
      font-size : 40px;
      line-height : 40px;
    }

    form {
      label.control-label { width : 50px !important; }
      .controls { margin-left : 70px; }

      input[type='submit'] {
        @include transition(background);
        @include box-shadow(0,0,0,0);

        background : rgb(255, 77, 54);
        color : #fff;
        text-shadow : none;
        border : 1px solid #000;

        &:hover {
          background : desaturate(rgb(255, 77, 54), 15%);
        }

        &:active {
          @include box-shadow(0,0,0,0);
          background : darken(rgb(255, 77, 54), 2%);
        }
      }
    }
  }

  #invites {
    margin : 20px 0;
  }

  #footer {
    position : absolute;
    bottom : 0;
    left : 0;
    width : 100%;
    padding : 10px 0;
    color : #333;
    text-align : center;
  }
}