.chapter{--pin-top:80px;position:relative;height:calc((var(--chapter-length, 200vh) + 100svh) / var(--zoom, 1) - var(--pin-top))}.chapter-pin{position:sticky;top:var(--pin-top);display:grid;grid-template-rows:auto minmax(0,1fr);gap:1.25rem;height:calc(100svh / var(--zoom, 1) - var(--pin-top) - 16px);padding-bottom:8px}.chapter-copy{display:flex;flex-direction:column;gap:1rem;min-width:0}.chapter-beats{display:grid}.chapter-beat{grid-area:1/1;max-width:34rem;will-change:opacity,transform}.chapter-beat-title{font-family:var(--font-display);font-size:var(--fs-h3);line-height:var(--lh-h3);letter-spacing:var(--tr-h3);color:var(--c-text)}.chapter-beat-body{margin-top:.6rem;font-size:var(--fs-body-lg);line-height:var(--lh-body-lg);color:color-mix(in srgb,var(--c-text) 82%,var(--c-muted))}.chapter-meter{display:flex;align-items:center;gap:.9rem;font-family:var(--font-mono),ui-monospace,monospace;font-size:var(--fs-tag);letter-spacing:var(--tr-tag);color:var(--c-muted)}.chapter-meter-track{position:relative;flex:0 0 7rem;height:2px;overflow:hidden;border-radius:2px;background:var(--c-rule)}.chapter-meter-fill{position:absolute;inset:0;transform-origin:left center;background:var(--c-text)}.chapter-stage{display:grid;min-height:0;container-type:size}.chapter-visual{grid-area:1/1;display:flex;align-items:center;justify-content:center;min-height:0;will-change:opacity,transform}.chapter-skip{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.chapter-skip:focus{position:relative;width:auto;height:auto;clip:auto;overflow:visible;min-height:44px;display:inline-flex;align-items:center}@media (max-width:639px){.chapter-beat-title{font-size:22px}.chapter-beat-body{margin-top:.35rem;font-size:15px;line-height:1.45}.chapter-pin{gap:.9rem}.chapter-stage{margin-left:calc(-1 * clamp(1.75rem, 5vw, 4.5rem) + 8px);margin-right:calc(-1 * clamp(1.75rem, 5vw, 4.5rem) + 8px)}}@media (min-width:1024px){.chapter{--pin-top:96px}.chapter[data-layout=split] .chapter-pin{grid-template-rows:minmax(0,1fr);grid-template-columns:minmax(17rem,.36fr) minmax(0,1fr);gap:clamp(2rem,4vw,4rem);align-items:center}.chapter[data-layout=split] .chapter-copy{gap:1.5rem}.chapter[data-layout=split] .chapter-stage{height:100%}.chapter[data-layout=stacked] .chapter-copy{flex-direction:row;align-items:flex-start;justify-content:space-between;gap:2rem}.chapter[data-layout=stacked] .chapter-beat{max-width:44rem}.chapter[data-layout=stacked] .chapter-meter{order:2;padding-top:.6rem}}@media (prefers-reduced-motion:reduce){.chapter{height:auto}.chapter-pin{position:static;height:auto;gap:2rem}.chapter-beats,.chapter-pin{display:flex;flex-direction:column}.chapter-beats{gap:1.5rem}.chapter-meter{display:none}.chapter-stage{display:flex;flex-direction:column;gap:1.5rem;container-type:normal}}