scss

@impoort

@import 'foo';

@extend

.c1 {
    font-size: 24px;
    color: green;
}

.c2 {
    @extend .c1;
    color: red;
}

@minin/@include

@minin couners {
    border-radius: 50%;
}

.button {
    @include corners;
    color: white;
}