@media only screen and ( max-width: 767px ) {
    @import "viewports/767down";
}

@media only screen and ( min-width: 768px ) {
    @import "viewports/768up";
}

@media only screen and ( max-width: 1023px ) {
    @import "viewports/1023down";
}

@media only screen and (min-width: 1024px) {
    @import "viewports/1024up";
}

@media only screen and (min-width: 1280px) {
    @import "viewports/1280up";
}