body {
    margin: 0;
}

.part {
    display: inline-block;
    width: 50%;
}

.source.simple {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds.png');
    background-size: 100%;
}
.sprite.simple {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds.png?sprite');
    background-size: 100%;
}

.source.retina {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds@2x.png');
    background-size: 100%;
}
.sprite.retina {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds.png?sprite&retina');
    background-size: 100%;
}

.source.retina2x {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds@2x.png');
    background-size: 100%;
}
.sprite.retina2x {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds@2x.png?sprite&retina@1x');
}

.source.retina4x {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds@4x.png');
    background-size: 100%;
}
.sprite.retina4x {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds.png?sprite&retina&retina@3x&retina@4x');
}

.source.simple-2 {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america.png') no-repeat;
    background-size: 80%;
}
.sprite.simple-2 {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america.png?sprite') no-repeat;
    background-size: 80%;
}

.source.retina-2 {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america@2x.png') no-repeat;
    background-size: 80%;
    background-position: 30px 20px;
}
.sprite.retina-2 {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america.png?sprite&retina') no-repeat;
    background-size: 80%;
    background-position: 30px 20px;
}

.source.retina4x-2 {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america@4x.png') no-repeat;
    background-size: 80%;
    background-position: 30px 20px;
}
.sprite.retina4x-2 {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america.png?sprite&retina&retina@3x&retina@4x') no-repeat;
    background-size: 80%;
    background-position: 30px 20px;
}