@mixin legacy {
    @if $browserType == "ie" {
        @content;
    }
}

@mixin modern {
    @if $browserType != "ie" {
        @content;
    }
}

@mixin mobile {
    @if $supportMobile {
    @media (max-width: 767px) {
        @content;
    }
    }
}

@mixin tablet {
    @if $browserType != "ie" {
    @media (min-width: 768px) {
        @content;
    }
    }
    @else {
        @content;       
    }
}