@mixin appearance($value) {
    -webkit-appearance: $value;
    -ms-appearance: $value;
    -o-appearance: $value;
    -ms-appearance: $value;
    appearance: $value;
}

@mixin transition($value) {
    -webkit-transition: $value;
    -ms-transition: $value;
    -o-transition: $value;
    -ms-transition: $value;
    transition: $value;
}

@mixin box-shadow($value) {
    -webkit-box-shadow: $value;
    -o-box-shadow: $value;
    -ms-box-shadow: $value;
    box-shadow: $value;
}