@media   (    max-width:600px    )      {}
@media   (   min-width:700px) and (     orientation:    landscape){}
@media (min-width: 700px), handheld and (orientation: landscape) {}
@media    not      all     and (   monochrome    ) {}
@media (   not     all    )    and     (   monochrome        ) {}
@media (  not (   screen     and   (  color  )  )   )  ,   print and   (  color ){}
@media    screen   and (   device-aspect-ratio:     16/9   ),   screen    and (device-aspect-ratio:16/10  ) {}

@media   (  -webkit-min-device-pixel-ratio:2),
         (min--moz-device-pixel-ratio: 2        ),
         (min-resolution:           2dppx),
         (min-resolution: 192dpi     ){}
