.storm-icon {
    background-size: 300px 63px;
    background-image: url('../images/storm-icons.png');

    @media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
        background-image: url('../images/storm-icons@2x.png');
    }
}

.storm-icon-pseudo {
    &:before {
        content: '';
        .storm-icon();
    }
}