@mixin user-select($value) {
    -webkit-user-select: $value;
    -moz-user-select: $value;
    -ms-user-select: $value;
    user-select: $value;
}

@mixin input-placeholder {
    &::placeholder {
        @content;
    }

    &::-moz-placeholder {
        @content;
    }

    &::-webkit-input-placeholder {
        @content;
    }

    &:-ms-input-placeholder {
        @content;
    }
}