@layer root {
    main > :first-child,
    main > article > :first-child { margin-block-start: 0; }
    main > :not(:last-child),
    main > article > :not(:last-child) { margin-block-end: var(--body-item-spacing); }
    main > :last-child,
    main > article > :last-child { margin-block-end: 0; }
}