/* Human-I-History — editorial / archive / documentary */

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.event.filter-animate{animation:filter-appear 280ms var(--story-ease)}
@keyframes expand-note{from{opacity:.35;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
@keyframes filter-appear{from{opacity:.3;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.evidence-card{transition:box-shadow 280ms,border-color 280ms}
.evidence-card:hover{border-color:#a9896c;box-shadow:0 10px 22px #1b292418}
.chapter-visual img[hidden]{display:none}
.chapter-visual .story-svg{display:block;width:100%;height:auto;border:1px solid #30473b;border-radius:7px;background:#14241e;box-shadow:0 12px 32px #17241a1b}
.story-mask{fill:#06170f;opacity:0;transition:opacity 430ms var(--story-ease);pointer-events:none}
.story-mask.is-dimmed{opacity:.76}
.story-halo{fill:none;stroke:#e9c58c;stroke-width:5;opacity:0;filter:drop-shadow(0 0 8px #f0c78666);pointer-events:none;transition:opacity 390ms var(--story-ease)}
.story-halo.is-focused{opacity:1;animation:story-outline 1.6s ease-in-out infinite alternate}
@keyframes story-outline{from{stroke:#c0a36f;stroke-width:3}to{stroke:#f3d29c;stroke-width:6}}

.story-controls{container:stepper/inline-size;display:grid;gap:.8rem;min-width:0;margin-top:1rem;padding:1rem;background:#e2d9c8;border:1px solid #bfb09a;border-radius:8px}
.story-controls-heading{display:flex;align-items:center;justify-content:space-between;gap:.5rem;flex-wrap:wrap}
.story-controls-title{font:700 .69rem/1.3 Georgia,serif;letter-spacing:.09em;color:#76573b}
.story-controls-current{font:700 .68rem/1.35 Georgia,serif;color:#435444;background:#d6c9b5;border:1px solid #bdad95;border-radius:20px;padding:.3rem .6rem}
.story-controls.is-looping .story-controls-current{background:#d9e3cf;border-color:#84a482;color:#2a5a39}
.story-controls.is-looping .story-controls-title::before{content:"↻ ";color:#607f62;font-size:.91rem}
.chapter-final .story-controls.is-looping .story-controls-current{background:#425e48;border-color:#bdc99b;color:#f1e5d2}
.chapter-final .story-controls.is-looping .story-controls-title::before{color:#e1bf8c}
.story-step-status{font-size:.83rem;color:#314639;line-height:1.7;min-height:2.5em;margin:0;font-weight:600;overflow-wrap:anywhere}
.story-step-progress{display:grid;grid-template-columns:repeat(var(--story-step-count),minmax(0,1fr));gap:.36rem;min-width:0}
.story-step-dot{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:.3rem;min-width:0;min-height:68px;padding:.48rem .18rem;border:1px solid #b6a790;border-radius:7px;background:#f1eadf;color:#36483a;cursor:pointer;transition:background 180ms,border-color 180ms,transform 180ms}
.story-step-index{font:700 .78rem/1 Georgia,serif;letter-spacing:.04em;color:#85694a}
.story-step-name{font-size:.75rem;font-weight:700;line-height:1.3;text-align:center;overflow-wrap:anywhere}
.story-step-dot::after{content:"";position:absolute;bottom:-1px;left:7px;right:7px;height:3px;border-radius:4px;background:#bd885b;transform:scaleX(0);transition:transform 180ms}
.story-step-dot.is-complete{background:#e3dfd2;border-color:#96a18d}
.story-step-dot:hover:not([aria-current="step"]){background:#ddd0b9;border-color:#a58b67;transform:translateY(-2px)}
.story-step-dot[aria-current="step"]{background:#274533;color:#fff7e9;border-color:#274533;box-shadow:0 3px 9px #18291d30}
.story-step-dot[aria-current="step"] .story-step-index{color:#f0c996}
.story-step-dot[aria-current="step"]::after{transform:scaleX(1);background:#e4bd81}
.story-step-actions{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.45rem;min-width:0;padding-top:.8rem;border-top:1px solid #c6b8a3}
.story-action-button{display:flex;align-items:center;justify-content:center;min-height:44px;min-width:0;padding:.6rem .45rem;border:1px solid #b6a58f;border-radius:6px;background:#ede4d7;color:#304438;font-size:.76rem;line-height:1.3;font-weight:700;text-align:center;cursor:pointer;transition:background 180ms,transform 180ms}
.story-action-button:hover:not(:disabled){background:#d8c8ac;transform:translateY(-2px)}
.story-action-button:disabled{opacity:.43;cursor:not-allowed}
.story-action-next{background:#294534;color:#fff6e9;border-color:#294534}
.story-action-next:hover:not(:disabled){background:#41664d}
.story-action-primary{background:#d6ba8b;color:#2b402f;border-color:#bc9b69}
.story-action-primary:hover:not(:disabled){background:#e7cc9b}
.story-action-all[aria-pressed="true"]{background:#eee1c8;border-color:#995c3b;color:#724125;box-shadow:inset 0 0 0 1px #995c3b}
.story-step-dot:focus-visible,.story-action-button:focus-visible{outline:3px solid #a75e3c;outline-offset:2px;z-index:1}
.chapter-final .story-controls{background:#263b2f;border-color:#53674e}
.chapter-final .story-controls-title{color:#e5bf8a}
.chapter-final .story-controls-current{background:#344b3c;color:#f4e4d1;border-color:#7b876f}
.chapter-final .story-step-status{color:#e8e3d4}
.chapter-final .story-step-actions{border-color:#56634f}
.chapter-final .story-step-dot{background:#30483a;border-color:#6b7d68;color:#ece3d2}
.chapter-final .story-step-index{color:#dfbe8f}
.chapter-final .story-step-dot.is-complete{background:#405743}
.chapter-final .story-step-dot:hover:not([aria-current="step"]){background:#4a644e}
.chapter-final .story-step-dot[aria-current="step"]{background:#d9bb8c;color:#233c2d;border-color:#d9bb8c}
.chapter-final .story-step-dot[aria-current="step"] .story-step-index{color:#395540}
.chapter-final .story-action-button{background:#324c3d;color:#f3e9d9;border-color:#788875}
.chapter-final .story-action-next{background:#d9b986;color:#233c2d;border-color:#d9b986}
.chapter-final .story-action-primary{background:#58694e;color:#fff0d4;border-color:#8f9774}
.chapter-final .story-action-all[aria-pressed="true"]{background:#46604b;border-color:#eac28e;color:#ffe7c5;box-shadow:inset 0 0 0 1px #eac28e}
.chapter-final .story-action-button:hover:not(:disabled){background:#536e57}
.chapter-final .story-action-next:hover:not(:disabled){background:#ead0a1;color:#203c2b}
.chapter-final .story-step-dot:focus-visible,.chapter-final .story-action-button:focus-visible{outline-color:#f4d19c}
@container stepper (max-width:560px){.story-step-actions{grid-template-columns:repeat(2,minmax(0,1fr))}}
@container stepper (max-width:350px){
.story-step-progress{grid-template-columns:repeat(2,minmax(0,1fr))}
.story-step-progress[data-steps="5"]{grid-template-columns:repeat(6,minmax(0,1fr))}
.story-step-progress[data-steps="5"] .story-step-dot{grid-column:span 2}
.story-step-progress[data-steps="5"] .story-step-dot:nth-last-child(-n+2){grid-column:span 3}
.story-step-dot{min-height:68px;padding-inline:.25rem}
.story-controls-title{font-size:.65rem}
}
@media(max-width:780px){
  .presentation-mode .presentation-controls{top:0;padding:.8rem .65rem;gap:.55rem}
  .chapter-progress{order:5;flex-basis:100%;justify-content:space-between}
  .chapter-progress-dot{flex:1}
  .story-controls{padding:.8rem}
  .story-step-status{font-size:.78rem}
  .story-action-button{padding:.6rem .4rem}
}

/* Presenter synchronization: one step state updates the visual and this text panel.
   Keep reading mode unchanged and only replace full chapter prose when enhanced. */
.presenter-narration{display:none}
.presentation-mode .chapter.has-synced-narration{
  display:grid;
  grid-template-columns:minmax(0,.90fr) minmax(0,1.10fr);
  column-gap:clamp(1.4rem,3vw,3.9rem);
  row-gap:clamp(.6rem,1.7vh,1.5rem);
  align-items:start;
  min-height:0;
  padding:clamp(.8rem,2vh,1.6rem) 0 clamp(1rem,2vh,1.8rem);
  overflow:visible;
}
.presentation-mode .chapter.has-synced-narration .chapter-side{
  grid-column:1/-1;grid-row:1;display:flex;flex-direction:row;
  flex-wrap:wrap;align-items:center;gap:.75rem 1.8rem;
  border-bottom:1px solid #bfb9aa;padding-bottom:.65rem;
}
.presentation-mode .chapter.has-synced-narration .chapter-side .chapter-year{font-size:1rem}
.presentation-mode .chapter.has-synced-narration .chapter-side .chapter-track{padding-top:0}
.presentation-mode .chapter.has-synced-narration .chapter-content{
  grid-column:1;grid-row:2;min-width:0;max-width:none;
  display:flex;flex-direction:column;justify-content:center;align-self:stretch;
}
.presentation-mode .chapter.has-synced-narration .chapter-content h3{
  font-size:clamp(1.8rem,2.9vw,3.2rem);
  line-height:1.26;letter-spacing:-.045em;margin:0 0 clamp(1rem,2.6vh,2rem);
}
.presentation-mode .chapter.has-synced-narration .chapter-content>p:not(.chapter-kicker),
.presentation-mode .chapter.has-synced-narration .chapter-content>a{display:none}
.presentation-mode .chapter.has-synced-narration .presenter-narration{
  display:block;min-width:0;
  padding:clamp(1.25rem,2vw,2.2rem);
  border:1px solid #ccbca5;border-left:5px solid #b06c47;
  border-radius:7px;background:#f3eee3;box-shadow:0 6px 20px #1728200e;
}
.presenter-narration-header{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  font-family:Georgia,"Noto Sans TC",serif;
  font-size:.76rem;letter-spacing:.1em;color:#9b654b;
}
.presenter-narration-counter{font-weight:700;color:#5e725d;white-space:nowrap}
.presenter-narration-heading{
  margin:clamp(1.1rem,2.5vh,1.8rem) 0 .8rem;
  font-family:Georgia,"Noto Serif TC",serif;
  font-size:clamp(1.65rem,2.55vw,2.95rem);font-weight:600;
  line-height:1.32;letter-spacing:-.03em;color:#233c2f;
  overflow-wrap:anywhere;
}
.presenter-narration-text{
  margin:0;max-width:34ch;
  font-size:clamp(1.13rem,1.42vw,1.45rem);
  line-height:1.85;font-weight:500;color:#495d50;
  overflow-wrap:anywhere;
}
.presenter-narration.presenter-updated{animation:presenter-caption-in 350ms cubic-bezier(.2,.7,.3,1)}
@keyframes presenter-caption-in{
  from{opacity:.64;transform:translateY(7px)}
  to{opacity:1;transform:translateY(0)}
}
.presentation-mode .chapter.has-synced-narration .chapter-visual{
  grid-column:2;grid-row:2;min-width:0;align-self:start;
  transform:none;
}
.presentation-mode .chapter.has-synced-narration .chapter-visual .story-svg{
  display:block;width:min(100%, 70vh);height:auto;
  max-height:49vh;margin-inline:auto;box-shadow:0 10px 26px #12251c20;
}
.presentation-mode .chapter.has-synced-narration .chapter-visual figcaption{display:none}
.presentation-mode .chapter.has-synced-narration .story-controls{
  gap:.42rem;margin-top:.5rem;padding:.7rem .8rem;
}
.presentation-mode .chapter.has-synced-narration .story-step-status{display:none}
.presentation-mode .chapter.has-synced-narration .story-step-dot{min-height:46px;padding:.3rem .15rem}
.presentation-mode .chapter.has-synced-narration .story-step-actions{padding-top:.5rem}
.presentation-mode .chapter.has-synced-narration .story-action-button{min-height:38px;padding:.3rem .35rem}
.presentation-mode .chapter.has-synced-narration .visual-open{font-size:.7rem;margin-top:.3rem}
.presentation-mode .chapter-final.has-synced-narration .chapter-side{border-color:#4c6550}
.presentation-mode .chapter-final.has-synced-narration .presenter-narration{
  background:#2b4435;border-color:#657b62;border-left-color:#d6b486;box-shadow:none;
}
.chapter-final .presenter-narration-header{color:#ddc295}
.chapter-final .presenter-narration-counter{color:#b5caa9}
.chapter-final .presenter-narration-heading{color:#f4eedf}
.chapter-final .presenter-narration-text{color:#d4dfce}
@media(max-width:1000px){
 .presentation-mode .chapter.has-synced-narration{
  grid-template-columns:minmax(0,1fr);gap:1.2rem; padding-inline:.3rem;
 }
 .presentation-mode .chapter.has-synced-narration .chapter-content{grid-column:1;grid-row:2}
 .presentation-mode .chapter.has-synced-narration .chapter-visual{grid-column:1;grid-row:3;width:100%}
 .presentation-mode .chapter.has-synced-narration .chapter-visual .story-svg{max-height:48vh}
 .presentation-mode .chapter.has-synced-narration .presenter-narration{padding:1rem 1.1rem}
 .presentation-mode .chapter.has-synced-narration .chapter-content h3{font-size:clamp(1.75rem,4.6vw,2.8rem)}
 .presenter-narration-heading{font-size:clamp(1.6rem,4vw,2.5rem)}
 .presenter-narration-text{font-size:clamp(1.12rem,2.6vw,1.35rem)}
}
@media(max-width:480px){
 .presentation-mode .chapter.has-synced-narration .chapter-side{gap:.35rem .95rem}
 .presentation-mode .chapter.has-synced-narration .chapter-content h3{font-size:1.75rem}
 .presentation-mode .chapter.has-synced-narration .presenter-narration{padding:.9rem}
 .presenter-narration-heading{font-size:1.6rem}
 .presenter-narration-text{font-size:1.08rem}
}
@media(prefers-reduced-motion:reduce){
 .presenter-narration.presenter-updated{animation:none!important}
}
.motion-reduced .presenter-narration.presenter-updated{animation:none!important}


/* v0.8 Projection lens: one vector camera per step, with inset overview. */
.story-zoom-stage{display:none}
.story-zoom-heading{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:.55rem 1rem;border-bottom:1px solid #4a6752;color:#d2b781;font:700 .75rem/1.4 Georgia,"Noto Sans TC",serif;letter-spacing:.1em}
.story-zoom-label{color:#f2ead7;font-size:.91rem;letter-spacing:0}
.story-zoom-frame{position:relative;overflow:hidden;height:clamp(330px,53vh,610px);width:100%;background:#12251d;border-radius:0 0 9px 9px;isolation:isolate}
.story-zoom-frame::after{content:"";position:absolute;inset:0;z-index:2;border:1px solid #314e3b;border-radius:inherit;box-shadow:inset 0 0 62px #04150d44;pointer-events:none}
.story-zoom-svg{display:block;width:100%;height:100%;background:#14241e}
.story-zoom-locator{position:absolute;right:1rem;top:1rem;z-index:3;width:clamp(125px,17%,172px);padding:.45rem;background:#0b1c15ec;border:1px solid #779176;border-radius:5px;color:#d9c29c;box-shadow:0 8px 24px #050e09a0;pointer-events:none}
.story-zoom-locator>span{display:block;font:700 .55rem/1.4 Georgia,serif;letter-spacing:.08em;margin-bottom:.3rem}
.story-zoom-thumb{display:block;width:100%;height:auto;border:1px solid #4b6655;border-radius:3px}
.story-zoom-locator .story-mask{transition:none}
.story-zoom-locator .story-halo{animation:none;transition:none;stroke-width:9;filter:none}
.story-zoom-conclusion{position:absolute;inset:0;z-index:1;display:flex;align-items:center;justify-content:center;padding:clamp(2rem,5vw,5rem);background:#14281fe8;color:#f5ddaf;font:600 clamp(1.65rem,2.5vw,3rem)/1.55 Georgia,"Noto Serif TC",serif;letter-spacing:-.025em;text-align:center;opacity:0;visibility:hidden;transition:opacity 450ms}
.story-zoom-stage.shows-conclusion .story-zoom-conclusion{opacity:1;visibility:visible}
.story-zoom-stage.shows-conclusion .story-zoom-locator{opacity:.35}
.presentation-mode .chapter.has-synced-narration{grid-template-columns:minmax(0,.64fr) minmax(0,1.36fr);column-gap:clamp(1.25rem,2.5vw,3.2rem)}
.presentation-mode .chapter.has-synced-narration .chapter-visual{display:flex;flex-direction:column;gap:0}
.presentation-mode .chapter.has-synced-narration .story-zoom-stage{display:block;overflow:hidden;background:#10251a;border:1px solid #395440;border-radius:9px;box-shadow:0 18px 46px #14251d33}
.presentation-mode .chapter.has-synced-narration .chapter-visual>.story-svg{display:none}
.presentation-mode .chapter.has-synced-narration .chapter-visual>.visual-open{display:none}
.presentation-mode .chapter.has-synced-narration .story-controls{gap:.4rem;margin-top:.55rem;padding:.52rem .65rem}
.presentation-mode .chapter.has-synced-narration .story-controls-heading{min-height:20px}
.presentation-mode .chapter.has-synced-narration .story-step-dot{min-height:43px;gap:.13rem;padding:.19rem .12rem}
.presentation-mode .chapter.has-synced-narration .story-step-name{font-size:.69rem}
.presentation-mode .chapter.has-synced-narration .story-step-index{font-size:.69rem}
.presentation-mode .chapter.has-synced-narration .story-step-actions{padding-top:.4rem}
.presentation-mode .chapter.has-synced-narration .story-action-button{min-height:35px;padding:.27rem .3rem;font-size:.7rem}
.presentation-mode .chapter.has-synced-narration .chapter-content h3{font-size:clamp(1.75rem,2.6vw,2.95rem)}
.presentation-mode .chapter.has-synced-narration .presenter-narration{padding:clamp(1rem,1.5vw,1.6rem)}
.presenter-narration-heading{font-size:clamp(1.7rem,2.2vw,2.65rem)}
@media(max-width:1000px){
 .presentation-mode .chapter.has-synced-narration{grid-template-columns:minmax(0,1fr)}
 .presentation-mode .chapter.has-synced-narration .chapter-visual{grid-column:1;grid-row:3}
 .presentation-mode .chapter.has-synced-narration .story-zoom-frame{height:clamp(300px,48vh,490px)}
 .presentation-mode .chapter.has-synced-narration .story-zoom-locator{width:125px}
}
@media(max-width:480px){
 .presentation-mode .chapter.has-synced-narration .story-zoom-frame{height:clamp(240px,62vw,350px)}
 .presentation-mode .chapter.has-synced-narration .story-zoom-locator{width:88px;right:.5rem;top:.5rem;padding:.26rem}
 .story-zoom-locator>span{font-size:.44rem}
 .story-zoom-heading{padding:.45rem .65rem;font-size:.62rem}
 .story-zoom-label{font-size:.75rem}
 .story-zoom-conclusion{font-size:1.35rem;padding:1.2rem}
}
@media(prefers-reduced-motion:reduce){.story-zoom-conclusion{transition:none!important}}
.motion-reduced .story-zoom-conclusion{transition:none!important}

@media(prefers-reduced-motion:reduce){
 .reveal-ready{opacity:1!important;transform:none!important}
 .presentation-mode .chapter.chapter-enter,.hero-copy .eyebrow,.hero h1,.hero-lead,.hero-cta,.art-ring.outer,.story-halo.is-focused,.event.filter-animate,.event[open] .event-body{animation:none!important}
 .story-mask,.story-halo,.story-step-dot,.story-step-dot::after,.story-action-button{transition:none!important}
}
.motion-reduced .reveal-ready{opacity:1!important;transform:none!important}
.motion-reduced.presentation-mode .chapter.chapter-enter,
.motion-reduced .hero-copy .eyebrow,.motion-reduced .hero h1,.motion-reduced .hero-lead,
.motion-reduced .hero-cta,.motion-reduced .art-ring.outer,.motion-reduced .story-halo.is-focused,
.motion-reduced .event.filter-animate,.motion-reduced .event[open] .event-body{animation:none!important}
.motion-reduced .story-mask,.motion-reduced .story-halo,.motion-reduced .story-step-dot,.motion-reduced .story-step-dot::after,.motion-reduced .story-action-button{transition:none!important}

/* v0.9 / A unified editorial reading experience and contained presentation stage. */
.site-header{position:sticky;top:0;z-index:55;box-shadow:0 6px 22px #0e201626}
.reading-progress-track{position:absolute;inset:auto 0 -2px;height:3px;overflow:hidden;background:#42574a;pointer-events:none}
#reading-progress-fill{display:block;width:100%;height:100%;background:#d9b37c;transform:scaleX(0);transform-origin:left center}
.chapter-directory{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.55rem;margin:-1rem auto 3rem;padding:1.3rem;background:#ded9ca;border:1px solid #c8bbab;border-radius:8px}
.chapter-directory-label{grid-column:1/-1;font:700 .66rem Georgia,serif;letter-spacing:.13em;color:#835942;margin-bottom:.3rem}
.chapter-directory a{display:flex;align-items:center;gap:.65rem;min-width:0;padding:.8rem .75rem;text-decoration:none;border:1px solid #bbb5a4;background:#eeeae0;color:#6c573d;font:700 .78rem Georgia,"Noto Sans TC",serif;border-radius:4px;transition:background .18s,border-color .18s,transform .18s}
.chapter-directory a span{min-width:0;color:#354c3e;font-family:"Noto Sans TC","Microsoft JhengHei",sans-serif;font-weight:600}
.chapter-directory a:hover{background:#f7f0e3;transform:translateY(-2px);border-color:#9e7c5a}
.chapter-directory a[aria-current="location"]{border-color:#54745a;background:#cdd9c8;color:#23452c;box-shadow:inset 0 -3px #647d64}
.back-top{position:fixed;z-index:50;right:clamp(.8rem,2.2vw,2rem);bottom:clamp(.8rem,2vw,2rem);display:flex;align-items:center;justify-content:center;gap:.4rem;min-width:3.6rem;min-height:3.25rem;padding:.6rem .8rem;border:1px solid #b99c71;background:#203b2b;color:#f9ebd1;text-decoration:none;border-radius:7px;font:700 .75rem Georgia,serif;box-shadow:0 9px 30px #13211848;opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .22s,transform .22s}
.back-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.back-top:hover{background:#385b43}
.reveal-ready{transform:translateY(12px);transition:opacity 440ms var(--story-ease),transform 440ms var(--story-ease)}
@media(min-width:781px){
 .chapter-visualized{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);column-gap:clamp(2rem,3vw,4.2rem);row-gap:1.8rem;align-items:center;min-height:0;padding:clamp(3rem,5vw,5rem) 0}
 .chapter-visualized .chapter-side{grid-column:1/-1;grid-row:1;display:flex;flex-direction:row;align-items:center;flex-wrap:wrap;gap:.8rem 2rem;padding-bottom:.95rem;border-bottom:1px solid #c3bbae}
 .chapter-visualized .chapter-side .chapter-year{font-size:1.15rem}
 .chapter-visualized .chapter-side .chapter-track{padding-top:0}
 .chapter-visualized .chapter-content{grid-column:1;grid-row:2;max-width:none}
 .chapter-visualized .chapter-visual{grid-column:2;grid-row:2;min-width:0}
 .chapter-final.chapter-visualized{padding:clamp(3rem,5vw,5rem) 2rem}
 .chapter-final.chapter-visualized .chapter-side{border-color:#526957}
}
/* Presentation is its own viewport, not a scroll destination in the article. */
html.presentation-mode{scroll-behavior:auto}
.presentation-mode body{overflow:hidden}
.presentation-mode #story{position:fixed;inset:0;z-index:100;width:100%;height:100dvh;max-width:none;min-height:0;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:auto;padding:clamp(.6rem,1.2vh,1rem) clamp(.8rem,3vw,3.5rem) 1.2rem;margin:0;background:#e9e5da}
.presentation-mode #story>*{max-width:1850px}
.presentation-mode #story .section-topline,
.presentation-mode #story .section-heading,
.presentation-mode #story .chapter-directory{display:none}
.presentation-mode #story .presentation-controls{position:sticky;top:0;display:flex;flex-wrap:nowrap;gap:.7rem;margin:0 auto .5rem;padding:.55rem .9rem;min-height:60px;border:1px solid #425e4b;border-radius:8px;background:#1b3529;box-shadow:0 8px 25px #10241822}
.presentation-mode #story .presentation-controls .control-button{min-height:39px;white-space:nowrap;border-radius:4px}
.presentation-mode #story #chapter-count{margin:0;color:#ebcf9e;font:700 .84rem Georgia,serif;white-space:nowrap}
.presentation-mode #story .chapter-progress{display:flex;flex:1;flex-wrap:nowrap;justify-content:center;min-width:0}
.presentation-mode #story .chapter-progress-dot{min-width:1.8rem;height:2rem;border-radius:4px}
.presentation-shortcuts{font-size:.64rem;color:#bdc8b8;white-space:nowrap;margin-left:auto}
.presentation-mode #story .chapters{margin:0 auto;min-height:0;border:0}
.presentation-mode #story .chapter{outline:none}
.presentation-mode #story .chapter.has-synced-narration{padding:clamp(.55rem,1.1vh,.9rem) 0 .5rem;row-gap:clamp(.55rem,1.4vh,.95rem);min-height:0}
.presentation-mode #story .chapter-final.has-synced-narration{margin:0;padding:clamp(.55rem,1.1vh,.9rem) clamp(.75rem,2vw,2.5rem) .7rem;border-radius:9px}
.presentation-mode #story .chapter.has-synced-narration .story-zoom-frame{height:clamp(280px,49dvh,615px)}
.presentation-mode #story .chapter.has-synced-narration .chapter-content h3{margin-bottom:clamp(.65rem,1.6vh,1.4rem)}
.presentation-mode #story .chapter.has-synced-narration .chapter-visual{align-self:start}
.presentation-mode #story .chapter.has-synced-narration .story-controls{margin-top:.55rem}
@keyframes chapter-enter{
 from{opacity:.18;transform:translateY(11px)}to{opacity:1;transform:translateY(0)}
}
@media(max-width:1279px){
 .presentation-shortcuts{display:none}
 .presentation-mode #story .presentation-controls{gap:.4rem}
}
@media(max-width:1000px){
 .chapter-directory{grid-template-columns:repeat(2,minmax(0,1fr))}
 .presentation-mode #story .chapter.has-synced-narration{grid-template-columns:1fr}
 .presentation-mode #story .chapter.has-synced-narration .story-zoom-frame{height:clamp(280px,43dvh,490px)}
 .presentation-mode #story .presentation-controls{flex-wrap:wrap}
 .presentation-mode #story .chapter-progress{order:5;flex-basis:100%}
}
@media(max-width:780px){
 .site-header{padding:.55rem 1rem}
 .brand-caption{display:none}
 .chapter-directory{margin-top:0}
 html{scroll-padding-top:8rem}
 .presentation-mode #story{padding:.55rem .7rem .8rem}
 .presentation-mode #story .presentation-controls{gap:.4rem;padding:.5rem}
 .presentation-mode #story .presentation-controls .control-button{padding:.5rem .6rem;min-height:40px;font-size:.73rem}
 .presentation-mode #story .chapter.has-synced-narration .story-zoom-frame{height:clamp(245px,39dvh,390px)}
}
@media(max-width:480px){
 .chapter-directory{gap:.4rem;padding:.8rem}
 .chapter-directory a{padding:.75rem .5rem;gap:.4rem;font-size:.72rem}
 .chapter-directory a span{font-size:.73rem}
 .back-top{right:.65rem;bottom:.65rem}
 .presentation-mode #story .chapter.has-synced-narration .story-zoom-frame{height:clamp(240px,64vw,340px)}
 .presentation-mode #story .chapter.has-synced-narration .presenter-narration{padding:.75rem}
}
@media(prefers-reduced-motion:reduce){
 .reveal-ready{opacity:1!important;transform:none!important}
 .back-top,.chapter-directory a{transition:none!important}
}
.motion-reduced .reveal-ready{opacity:1!important;transform:none!important}
.motion-reduced .back-top,.motion-reduced .chapter-directory a{transition:none!important}
/* A more-specific presentation grid must never override native [hidden]. */
html.presentation-mode #story .chapter[hidden]{display:none!important}
/* Presenter transport feedback: deterministic visual progress, no separate timer. */
.story-playback-track{height:4px;overflow:hidden;border-radius:50px;background:#bbae99}
.story-playback-bar{display:block;width:100%;height:100%;transform:scaleX(0);transform-origin:left center;background:#7b9e76}
.story-playback-bar.is-running{animation:story-dwell var(--playback-duration,6000ms) linear forwards}
@keyframes story-dwell{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.chapter-final .story-playback-track{background:#536d56}
.chapter-final .story-playback-bar{background:#e8c48d}
.presentation-mode #story .story-playback-track{height:3px}
.presentation-mode #stage-motion-toggle[aria-pressed="true"]{border-color:#e6c58c;background:#d9b884;color:#1b3228}
@media(prefers-reduced-motion:reduce){.story-playback-bar.is-running{animation:none!important}}
.motion-reduced .story-playback-bar.is-running{animation:none!important}

/* v1.0: Historical evidence first, concept diagrams second. */
.historical-photo-card{overflow:hidden;border:1px solid #a28b6e;background:#20382b;border-radius:8px;box-shadow:0 14px 32px #11221824;margin:0 0 1.1rem}
.historical-photo-top{display:flex;justify-content:space-between;align-items:center;gap:.75rem;flex-wrap:wrap;padding:.8rem 1rem;color:#dcc194;font:700 .7rem/1.5 Georgia,serif;letter-spacing:.07em}
.historical-photo-top strong{font:600 .94rem/1.4 "Noto Sans TC","Microsoft JhengHei",sans-serif;letter-spacing:0;color:#f5e9d4}
.historical-photo-card .historical-photo{display:block;width:100%;height:auto;aspect-ratio:1280 / 853;object-fit:cover;border:0}
.historical-photo-caption{display:flex;flex-direction:column;gap:.35rem;padding:.85rem 1rem 1rem;background:#233a2d;color:#d1decf;line-height:1.6;font-size:.8rem}
.historical-photo-caption strong{font-size:1.07rem;color:#ffe1aa}
.historical-photo-caption a{align-self:flex-start;color:#f4d59f;text-underline-offset:4px;font-size:.75rem}
.historical-concept-label{font:700 .73rem/1.6 "Noto Sans TC",sans-serif;letter-spacing:.02em;color:#785741;padding:.15rem 0 .6rem}
.story-historical-lens{position:absolute;inset:0;z-index:1;background:#09170f;opacity:0;visibility:hidden;overflow:hidden;transition:opacity 500ms ease,visibility 500ms;pointer-events:none}
.story-historical-lens>img{display:block;width:100%;height:100%;object-fit:cover;object-position:50% 45%;transform:scale(1);transition:transform 900ms cubic-bezier(.22,.61,.36,1),object-position 900ms}
.story-historical-caption{position:absolute;left:0;right:0;bottom:0;min-height:6.5rem;display:flex;flex-direction:column;justify-content:end;gap:.45rem;padding:3rem clamp(1.2rem,3.5vw,3rem) 1.1rem;color:#fff6e5;background:linear-gradient(transparent,#06110cee 72%);text-shadow:0 2px 8px #000c}
.story-historical-caption span{font:700 .65rem Georgia,serif;letter-spacing:.14em;color:#e8c18a}
.story-historical-caption strong{font:600 clamp(1.05rem,1.46vw,1.42rem)/1.55 "Noto Sans TC","Microsoft JhengHei",sans-serif;max-width:35ch}
.story-zoom-stage.shows-history .story-historical-lens{opacity:1;visibility:visible}
.story-zoom-stage.shows-history .story-zoom-svg{opacity:0}
.story-zoom-stage.shows-history .story-zoom-locator{opacity:0;visibility:hidden}
.story-zoom-stage.history-closeup .story-historical-lens>img{transform:scale(1.2);object-position:50% 61%}
.presentation-mode #chapter-01 .historical-photo-card,
.presentation-mode #chapter-01 .historical-concept-label{display:none}
@media(max-width:1000px){.story-historical-caption{padding:2.5rem 1rem .85rem}.story-historical-caption strong{font-size:1.05rem}}
@media(prefers-reduced-motion:reduce){.story-historical-lens,.story-historical-lens>img{transition:none!important}}
.motion-reduced .story-historical-lens,.motion-reduced .story-historical-lens>img{transition:none!important}