레티나디스플레이를 지원하는 미디어 쿼리
@media (-webkit-min-device-pixel-ratio: 2),
(min--moz-device-pixel-ratio: 2),
(-o-min-device-pixel-ratio: 2/1),
(min-device-pixel-ratio: 2),
(min-resolution: 192dpi),
(min-resolution: 2dppx) {
}
@media (-webkit-min-device-pixel-ratio: 2),
(min--moz-device-pixel-ratio: 2),
(-o-min-device-pixel-ratio: 2/1),
(min-device-pixel-ratio: 2),
(min-resolution: 192dpi),
(min-resolution: 2dppx) {
}