// @include curved(%);
@mixin curved($s) {
    border-bottom-right-radius: 50% $s;
    border-top-right-radius: 50% $s;
    border-bottom-left-radius: 50% $s;
    border-top-left-radius: 50% $s;
    
    @include small {
        border-bottom-right-radius: 50% 10%;
        border-bottom-left-radius: 50% 10%;
    }
    
    @include medium {
        border-bottom-right-radius: 50% 10%;
        border-bottom-left-radius: 50% 10%;
    }
}