:block(scrollable) {
    overflow: auto;

    width: 300px;
    height: 300px;

    background-color: #eee;

    :block(test) {
        position: relative;

        width: 800px;
        height: 800px;

        :block(link) {
            position: absolute;
            top: 50%;
            left: 50%;
        }
    }
}