@media only screen and (max-width: 600px) {

}
@media only screen and (min-width: 600px) {

}
@media only screen and (min-width: 768px) {

}
@media only screen and (min-width: 992px) {

}
@media only screen and (min-width: 1200px) {

}
@media only screen and (min-width: 1600px) {

}