$desktop_width: 4096px;
$tablet_width: 1024px;
$mobile_width: 640px;

@mixin media_desktop{
    @media only screen
    and (max-width: #{$desktop_width}) {
        @content;
    }
}

@mixin media_tablet{
    @media only screen
    and (max-width: #{$tablet_width}){
        @content;
    }
}
@mixin media_mobile{
    @media only screen
    and (max-width: #{$mobile_width}){
        @content;
    }
}

@mixin media_ie{ // ie9+ (for applying rules USE !important)
    @media screen
    and (min-width:0\0)
    and (min-resolution: +72dpi) {
        @content;
    }
}

@mixin media_edge {
    @supports (-ms-accelerator:true){
        @content;
    }
}