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/* Keep artwork inside its grid track; use a stacked chapter in the side panel. */
.chapter{grid-template-columns:minmax(0,55fr) minmax(0,45fr)}
.chapter-image,.chapter-copy{min-width:0}
.chapter-image{width:100%;height:100%;min-height:0;aspect-ratio:auto}
.art{background-image:none}
.art svg{width:100%;height:100%;display:block}
@media(max-width:1100px){.chapter{grid-template-columns:minmax(0,1fr)}.chapter-image{height:auto;aspect-ratio:3/2}.chapter-copy{padding:32px 36px}.section-head{flex-wrap:wrap}.chapter-copy .fact{max-width:700px}}
@media(max-width:700px){.chapter-copy{padding:30px}.chapter-image{height:auto;aspect-ratio:3/2}}

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/* Canvas pieces stay inside the chapter image and never intercept interaction. */
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.chapter-fragment{position:absolute;display:block;will-change:transform,opacity;backface-visibility:hidden}
.chapter-image.has-fragments .art,.chapter-image.has-fragments .art-label,.chapter-image.has-fragments .image-disclosure{visibility:hidden}
.chapter-tabs button:disabled{cursor:wait}