@media only screen and (max-width: 600px)
@media only screen and (max-width: 600px) and (-webkit-min-device-pixel-ratio: 1.5), only screen and (max-width: 600px) and (min-resolution: 1.5dppx)
@media (min-width: 1500px)
@media (min-width: 1900px) @media only screen and (max-width: 600px) and (-webkit-min-device-pixel-ratio: 2), only screen and (max-width:600px) and (min-resolution: 2dppx)