.cls1 { /*!*/ }
.cls2 {
composes: cls1;

position: relative;
display: block;
overflow-x: hidden;
overflow-y: auto;
box-sizing: border-box;
padding: var(--space) calc(var(--space) * 1.5);
font-size: var(--font-size);
color: var(--color-text-dark);
flex: 1 1 auto;
min-width: 0;
min-height: 0;
max-height: 65vh;
}