inheritance.scss

 .button {
        height: 30px;
        font-size: 16px;
        padding: 0 2rem; 
        border-radius: 4px;
    }

    .button-default {
        @extend .button;
        color: #404040;
        border: 1px solid #404040;
    } 

    .button-success {
        @extend .button;
        background: green;
        color: white; 
    }

    .button-danger {
        @extend .button;
        background: red;
        color: white;
    }