/* ══ grid-row-end ══════════════════════════════════════════════════════════ */

x  { grid-row-end: auto }
aa { grid-row-end: footer }
ab { grid-row-end: 4 }
ac { grid-row-end: -1 }
ad { grid-row-end: span 3 }
ae { grid-row-end: span footer }
af { grid-row-end: span 2 footer }