/* One background per card; alternate artworks stay within that card. */
.archive-card .space-preview-stack{position:relative;aspect-ratio:16/9;overflow:hidden}
.archive-card .space-preview-stack img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;transform:none;transition:opacity .4s ease}
.space-preview-stack[data-layer="0"] img[data-layer="0"],.space-preview-stack[data-layer="1"] img[data-layer="1"]{opacity:1}
.archive-card .space-version-badge{margin:0;letter-spacing:0;font-size:10px;white-space:nowrap;font-variant-numeric:tabular-nums}
.archive-card:focus-visible{outline:2px solid var(--accent);outline-offset:-3px}
.space-version-stage{position:relative}
.space-version-lightbox .lightbox-image{display:block;max-height:calc(94dvh - 170px)}
.space-version-arrow{position:absolute;top:50%;transform:translateY(-50%);display:grid;place-items:center;width:44px;height:44px;border:1px solid #ded7cc;background:#faf7f0ed;color:var(--ink);border-radius:50%;z-index:1}
.space-version-arrow[data-direction="-1"]{left:12px}
.space-version-arrow[data-direction="1"]{right:12px}
.space-version-arrow svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.4}
.space-version-picker{display:flex;align-items:center;justify-content:center;gap:16px;padding:10px 20px;border-bottom:1px solid var(--line)}
.space-version-count{font-size:11px;font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--muted)}
.space-version-thumbnails{display:flex;gap:8px;overflow-x:auto;min-width:0;padding:3px;scrollbar-width:thin}
.space-version-thumb{flex:0 0 76px;width:76px;height:54px;padding:3px;border:1px solid transparent;background:#eeeae2}
.space-version-thumb img{display:block;width:100%;height:100%;object-fit:contain}
.space-version-thumb[aria-pressed="true"]{border-color:var(--ink);background:var(--paper)}
.space-version-thumb:hover,.space-version-arrow:hover{border-color:var(--accent)}
.space-version-thumb:focus-visible,.space-version-arrow:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
@media(max-width:760px){
 .archive-card .space-version-badge{font-size:9px}
 .space-version-lightbox .lightbox-image{max-height:calc(94dvh - 200px)}
 .space-version-picker{justify-content:flex-start;gap:10px;padding:7px 10px}
 .space-version-thumb{flex-basis:65px;width:65px;height:48px}
 .space-version-arrow[data-direction="-1"]{left:7px}
 .space-version-arrow[data-direction="1"]{right:7px}
}
@media(prefers-reduced-motion:reduce){.archive-card .space-preview-stack img{transition:none}}