:is(.is-layout-flow, .is-layout-constrained) {
> *:where(:not(h1, h2, h3, h4, h5, h6)) {
margin-block-start: 0;
margin-block-end: var(--theme-content-spacing);
}
:where(h1, h2, h3, h4, h5, h6) {
margin-block-end: calc(var(--has-theme-content-spacing, 1) * (0.3em + 10px));
}
}