.boom{margin:clamp(20px,2.6vw,32px) 0 0;position:relative}
.boom video,.boom .still{display:block;width:100%;height:auto;max-width:100%;
  aspect-ratio:auto 1280/678;background:var(--paper);
  filter:saturate(.92) contrast(1.04) brightness(.98)}     
.boom .still{display:none}
.boom .cap{margin:12px 0 0;font-family:var(--serif);font-size:15px;line-height:1.5;
  color:var(--mid);text-wrap:pretty}

.fo .por figure:not(.boom),.fo .por figure.boom{position:static}

@media(prefers-reduced-motion:reduce){
  .boom video{display:none}
  .boom .still{display:block}
}

.boom.is-still video{display:none}
.boom.is-still .still{display:block}