.r4m-api-icon{background:url(/img/sprites/r4m-api-icons.png) top left no-repeat;}
span.r4m-api-icon{display:inline-block;}
@media only screen and (-webkit-min-device-pixel-ratio: 2),
  only screen and (min-device-pixel-ratio: 2) {
    .r4m-api-icon{
      background-image: url(/img/sprites/r4m-api-icons2x.png);
      background-size: 381px 381px;
    }
}

.r4m-api-icon.api-key{width:127px;height:127px;background-position:-0px -0px;}
.r4m-api-icon.api-simulator{width:127px;height:127px;background-position:-0px -127px;}
.r4m-api-icon.benchmarks{width:127px;height:127px;background-position:-254px -127px;}
.r4m-api-icon.examples{width:127px;height:127px;background-position:-0px -254px;}
.r4m-api-icon.get-libraries{width:127px;height:127px;background-position:-127px -127px;}
.r4m-api-icon.quickstart{width:127px;height:127px;background-position:-127px -0px;}
.r4m-api-icon.reference{width:127px;height:127px;background-position:-127px -254px;}
.r4m-api-icon.tutorials{width:127px;height:127px;background-position:-254px -0px;}