@media screen для мобильных устройств

/* monitors and laptops */
@media (min-width: 1240px)  {}

/* tablet */
@media (min-width: 1024px) and (max-width: 1240px)  {}

@media (min-width: 768px) and (max-width: 1024px) {}

/* mobile */
@media (max-width: 768px) {}

/* iPad in portrait & landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px)  {}

/* iPad in landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: landscape) {}

/* iPad in portrait */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: portrait) {}

/* Retina iPad in portrait & landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (-webkit-min-device-pixel-ratio: 2) {}

/* Retina iPad in landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: landscape)
and (-webkit-min-device-pixel-ratio: 2) {}

/* Retina iPad in portrait */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: portrait) and (-webkit-min-device-pixel-ratio: 2) {}

/* iPad 1 & 2 in portrait & landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (-webkit-min-device-pixel-ratio: 1){}

/* iPad 1 & 2 in landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: landscape) and (-webkit-min-device-pixel-ratio: 1)  {}

/* iPad 1 & 2 in portrait */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: portrait) and (-webkit-min-device-pixel-ratio: 1) {}

/* iPad mini in portrait & landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (-webkit-min-device-pixel-ratio: 1)  {}

/* iPad mini in landscape */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: landscape) and (-webkit-min-device-pixel-ratio: 1)  {}

/* iPad mini in portrait */
@media (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: portrait) and (-webkit-min-device-pixel-ratio: 1)  {}

/* iPhone 5 in portrait & landscape */
@media (min-device-width: 320px) and (max-device-width: 568px) {}

/* iPhone 5 in landscape */
@media (min-device-width: 320px) and (max-device-width: 568px) and (orientation: landscape) {}

/* iPhone 5 in portrait */
@media (min-device-width: 320px) and (max-device-width: 568px) and (orientation: portrait) {}

/* iPhone 2G-4S in portrait & landscape */
@media (min-device-width: 320px) and (max-device-width: 480px) {}

/* iPhone 2G-4S in landscape */
@media (min-device-width: 320px) and (max-device-width: 480px) and (orientation: landscape) {}

/* iPhone 2G-4S in portrait */
@media (min-device-width: 320px) and (max-device-width: 480px) and (orientation: portrait) {}