body {
    margin: 0;
}

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

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

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

.source.image-set-prefix {
    width: 128px;
    height: 128px;
    background: -webkit-image-set(url('../../fixtures/images/retina/angry-birds@2x.png') 2x);
}
.sprite.image-set-prefix {
    width: 128px;
    height: 128px;
    background: -webkit-image-set(url('../../fixtures/images/retina/angry-birds@2x.png?sprite') 2x);
}

.source.image-set-fallback {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds.png');
    background: -webkit-image-set(url('../../fixtures/images/retina/angry-birds.png') 1x, url('../../fixtures/images/retina/angry-birds@2x.png') 2x);
}
.sprite.image-set-fallback {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/angry-birds.png?sprite');
    background: -webkit-image-set(url('../../fixtures/images/retina/angry-birds.png?sprite') 1x, url('../../fixtures/images/retina/angry-birds@2x.png?sprite') 2x);
}

.source.image-set-and-other-things {
    width: 100px;
    height: 150px;
    background: url('../../fixtures/images/retina/angry-birds.png');
    background: -webkit-image-set(url('../../fixtures/images/retina/angry-birds.png') 1x, url('../../fixtures/images/retina/angry-birds@2x.png') 2x);
    background-size: 120%;
    background-position: 30px 20px;
    background-repeat: no-repeat;
}
.sprite.image-set-and-other-things {
    width: 100px;
    height: 150px;
    background: url('../../fixtures/images/retina/angry-birds.png?sprite');
    background: -webkit-image-set(url('../../fixtures/images/retina/angry-birds.png?sprite') 1x, url('../../fixtures/images/retina/angry-birds@2x.png?sprite') 2x);
    background-size: 120%;
    background-position: 30px 20px;
}

.source.image-default-resolution {
    width: 128px;
    height: 128px;
    background: -webkit-image-set(
        url('../../fixtures/images/retina/minion@3x.png') 3x,
        url('../../fixtures/images/retina/minion.png') 1x,
        url('../../fixtures/images/retina/minion@2x.png') 2x
    );
}
.sprite.image-default-resolution {
    width: 128px;
    height: 128px;
    background: -webkit-image-set(
        url('../../fixtures/images/retina/minion@3x.png?sprite') 3x
        url('../../fixtures/images/retina/minion.png?sprite') 1x,
        url('../../fixtures/images/retina/minion@2x.png?sprite') 2x,
    );
}

.source.image-set-different {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america.png');
    background: -webkit-image-set(
        url('../../fixtures/images/retina/captain-america.png') 1x,
        url('../../fixtures/images/retina/captain-america@2x.png') 2x,
        url('../../fixtures/images/retina/captain-america@3x.png') 3x
    );
}
.sprite.image-set-different {
    width: 128px;
    height: 128px;
    background: url('../../fixtures/images/retina/captain-america.png?sprite');
    background: -webkit-image-set(
        url('../../fixtures/images/retina/captain-america.png?sprite') 1x,
        url('../../fixtures/images/retina/captain-america@2x.png?sprite=other-sprite') 2x,
        url('../../fixtures/images/retina/captain-america@3x.png') 3x
    );
}