.stack {
    --stack-gap: var(--s0, 1rem);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.stack > * {
    margin-block: 0;
}

.stack > * + * {
    margin-block-start: var(--stack-gap);
}

.stack-split {
    margin-block-start: auto;
}