.ex-main { flex-grow: 1; padding-bottom: var(--space-9); }
.ex-page-head { max-width: 900px; }
.ex-page-head .ao-page__eyebrow { flex-wrap: wrap; }
.ex-page-head .ao-page__eyebrow a, .ex-page-head .ao-page__eyebrow span:not(.ao-sep) { white-space: nowrap; }
.ex-page-head .ao-page__title { max-width: 20em; }
.ex-topic-name { color: var(--ai); font-size: 15px; margin: var(--space-5) 0 var(--space-2); }
.ex-group-nav { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-top: 24px; font-size: 15px; }
.ex-connection { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding: 22px 0; border-block: 1px solid var(--line); font-size: clamp(15px, 2vw, 20px); }
.ex-connection a { text-decoration-thickness: 1px; text-underline-offset: 5px; }
.ex-connection span { color: var(--ink-muted); }
.ex-group { padding-top: var(--space-8); scroll-margin-top: 90px; }
.ex-group-head { max-width: 680px; margin-bottom: 28px; }
.ex-group-head h2, .ex-about h2 { font-family: var(--font-serif); font-size: clamp(24px, 3vw, 32px); line-height: 1.5; margin-bottom: 12px; }
.ex-group-head p, .ex-about p { line-height: 1.9; }
.ex-exhibits { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 28px; }
.ex-exhibit { min-width: 0; display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.ex-exhibit-main { display: block; width: 100%; color: var(--ink); text-decoration: none; }
.ex-exhibit-main img { display: block; width: 100%; height: 230px; object-fit: contain; background: #fff; }
.ex-exhibit-main h3 { font-family: var(--font-serif); font-size: 23px; line-height: 1.5; margin-top: 16px; }
.ex-exhibit-main:hover h3 { text-decoration: underline; text-underline-offset: 4px; color: var(--ai); }
.ex-exhibit > p { font-size: 15px; line-height: 1.85; }
.ex-exhibit .ex-exhibit-period { color: var(--ink-muted); font-size: 13px; margin-top: auto; }
.ex-text-preview { min-height: 230px; display: flex; align-items: center; padding: 30px; background: var(--ai-soft); color: var(--ink); }
.ex-text-preview p { font-family: var(--font-serif); font-size: 25px; line-height: 1.7; }
.ex-about { margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--line); max-width: 760px; }
.ex-about p { margin-bottom: 16px; }
.ex-hero-figure { max-width: 860px; margin: 8px 0 48px; }
.ex-layout { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 42px; align-items: start; }
.ex-toc { position: sticky; top: 86px; font-size: 14px; line-height: 1.8; }
.ex-toc p { font-weight: 600; margin-bottom: 14px; }
.ex-toc ol { padding-left: 1.5em; margin: 0; }
.ex-toc li { padding-bottom: 12px; }
.ex-toc a { text-decoration: none; }
.ex-toc a:hover { text-decoration: underline; }
.ex-toc-back { display: inline-block; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); }
.ex-content { min-width: 0; }
.ex-section { padding-block: 44px; border-bottom: 1px solid var(--line); scroll-margin-top: 90px; }
.ex-section > h2, .ex-related h2 { font-family: var(--font-serif); font-size: clamp(24px, 3vw, 31px); line-height: 1.55; margin-bottom: 22px; }
.ex-copy { max-width: 680px; font-size: 16px; line-height: 1.95; overflow-wrap: anywhere; }
.ex-copy p + p { margin-top: 16px; }
.ex-quote { border-left: 3px solid var(--ai); margin: 28px 0; padding: 8px 0 8px 24px; max-width: 680px; }
.ex-quote p { font-family: var(--font-serif); font-size: 20px; line-height: 1.9; white-space: pre-line; }
.ex-quote cite { display: block; margin-top: 12px; color: var(--ink-muted); font-style: normal; font-size: 13px; }
.ex-steps { padding-left: 1.75em; margin: 28px 0; max-width: 680px; }
.ex-steps li { padding: 0 0 22px 10px; }
.ex-steps li::marker { color: var(--ai); font-family: var(--font-mono); }
.ex-steps h3 { font-size: 17px; margin-bottom: 6px; }
.ex-steps p { line-height: 1.85; font-size: 15px; }
.ex-figures { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 20px; margin-block: 28px; }
.ex-figures--single { grid-template-columns: minmax(0, 1fr); }
.ex-figure { min-width: 0; margin: 0; }
.ex-image-link { position: relative; display: block; background: #fff; }
.ex-image-link img { display: block; width: 100%; height: auto; max-height: 640px; object-fit: contain; }
.ex-image-hint { position: absolute; right: 8px; bottom: 8px; background: #1b2129; color: #fff; padding: 5px 10px; font-size: 12px; }
.ex-figure figcaption { margin-top: 10px; font-size: 14px; line-height: 1.8; color: var(--ink-muted); }
.ex-table-scroll { margin-block: 28px; max-width: 100%; overflow-x: auto; }
.ex-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; line-height: 1.85; }
.ex-table caption { text-align: left; margin-bottom: 12px; font-size: 13px; color: var(--ink-muted); }
.ex-table th, .ex-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; min-width: 120px; }
.ex-table thead th { border-bottom: 2px solid var(--line-strong); font-weight: 600; }
.ex-table tbody th { font-weight: 500; }
.ex-table tbody tr:nth-child(even) { background: var(--paper-raised); }
.ex-detail { margin-top: 24px; border-block: 1px solid var(--line); }
.ex-detail summary, .ex-summary > summary { cursor: pointer; padding: 17px 0; font-size: 15px; font-weight: 600; }
.ex-detail-body { padding-bottom: 24px; }
.ex-links { list-style: none; padding: 0; margin: 24px 0 0; display: flex; flex-wrap: wrap; gap: 12px 26px; font-size: 15px; }
.ex-videos { margin-block: 28px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 20px; }
.ex-video { margin: 0; min-width: 0; }
.ex-video-player { position: relative; min-width: 0; }
.ex-video-start { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); border: 1px solid #fff; padding: 12px 20px; background: var(--ai); color: #fff; font: inherit; font-size: 15px; white-space: nowrap; cursor: pointer; box-shadow: 0 2px 16px #0006; }
.ex-video-start:disabled { cursor: wait; }
.ex-video video { display: block; width: 100%; max-height: 530px; background: #000; }
.ex-video figcaption { font-size: 14px; line-height: 1.8; margin-top: 12px; }
.ex-video figcaption p { margin-block: 6px; color: var(--ink-muted); }
#parts .ex-videos { grid-template-columns: minmax(0, 1fr); }
#parts .ex-video { display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); gap: 28px; align-items: center; }
#parts .ex-video video { width: 100%; height: auto; max-height: none; }
#parts .ex-video figcaption { margin-top: 0; }
.ex-related { padding-block: 42px 28px; }
.ex-related ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 22px; }
.ex-related a { font-size: 18px; }
.ex-related p { max-width: 680px; margin-top: 5px; font-size: 14px; line-height: 1.85; color: var(--ink-muted); }
.ex-record-note { max-width: 680px; font-size: 13px; color: var(--ink-muted); line-height: 1.85; margin-block: 18px 24px; }
.ex-summary { padding: 0 22px; background: var(--paper-raised); border: 1px solid var(--line); }
.ex-summary-body { padding: 10px 0 24px; }
.ex-slide-controls { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.ex-slide-controls button { border: 1px solid var(--ai); background: var(--paper); color: var(--ai); padding: 9px 20px; font: inherit; cursor: pointer; }
.ex-slide-controls button:disabled { opacity: .45; cursor: default; }
.ex-slide-controls p, .ex-slide-position { font-size: 13px; color: var(--ink-muted); }
.ex-summary-slide { display: grid; gap: 14px; }
.ex-summary-slide + .ex-summary-slide { margin-top: 28px; }
.ex-summary-slide h2 { font-family: var(--font-serif); font-size: 25px; line-height: 1.55; }
.ex-summary-slide > p:not(.ex-slide-position) { max-width: 680px; font-size: 16px; line-height: 1.9; }
.ex-summary-slide img { width: 100%; height: auto; max-height: 360px; object-fit: contain; background: #fff; }
.ex-summary-slide a { font-size: 14px; }
.ex-lightbox { border: 0; background: var(--paper); color: var(--ink); width: min(1200px, 94vw); max-width: 94vw; max-height: 92dvh; padding: 20px; }
.ex-lightbox::backdrop { background: rgba(0, 0, 0, .8); }
.ex-lightbox-close { display: block; margin-left: auto; margin-bottom: 16px; padding: 8px 20px; border: 1px solid var(--line-strong); color: var(--ink); background: var(--paper-raised); font: inherit; cursor: pointer; }
.ex-lightbox figure { margin: 0; }
.ex-lightbox img { display: block; max-width: 100%; max-height: 73dvh; width: auto; height: auto; margin: auto; object-fit: contain; background: #fff; }
.ex-lightbox figcaption { margin-top: 14px; font-size: 14px; line-height: 1.8; }
.ex-lightbox-original { display: inline-block; margin-top: 16px; font-size: 14px; }
.ex-main [hidden] { display: none !important; }
.ex-main :focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }
@media (max-width: 900px) {
  .ex-exhibits { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ex-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .ex-toc { position: static; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .ex-toc ol { columns: 2; }
  .ex-toc li { break-inside: avoid; }
  .ex-hero-figure { margin-bottom: 28px; }
}
@media (max-width: 560px) {
  .ex-exhibits, .ex-figures, .ex-videos { grid-template-columns: minmax(0, 1fr); }
  .ex-exhibit-main img { height: 260px; }
  .ex-text-preview { min-height: 200px; }
  .ex-section { padding-block: 32px; }
  .ex-toc ol { columns: 1; }
  .ex-summary { padding-inline: 16px; }
  .ex-table th, .ex-table td { padding: 10px; }
  .ex-connection { gap: 9px; }
  .ex-lightbox { padding: 12px; }
  #parts .ex-video { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  #parts .ex-video video { max-width: 300px; margin-inline: auto; }
}
@media (prefers-reduced-motion: reduce) { .ex-main { scroll-behavior: auto; } }