aex/style/_mixins.scss

@mixin heading {
    font-family: "Neusa Next Pro";
}

@mixin button {
    @include heading;
    font-weight: 900;
    background: crimson;
    text-align: center;
    color: white;
    &:hover {
        filter: hue-rotate(40deg);
        transition: filter .2s;
    }
}