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/* Explicit control geometry and evidence grid stay legible in every locale. */
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@media(max-width:1000px){.chips{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:760px){.chips{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.chip{font-size:12px;min-height:54px}.welcome-controls button{font-size:11px;height:48px;min-height:48px}.situ-panel{grid-template-columns:minmax(0,1fr)}.sp-item:nth-child(n){grid-column:1;grid-row:auto}.sp-foot{grid-column:1;grid-row:auto}.welcome-controls{gap:7px}.motion-controls button{min-height:44px}}
.sp-item .v,.path-detail .pd-title,.fcard .fname{font-family:var(--serif)!important}.brand>span{display:block;line-height:1.2}.brand .bname{display:block;line-height:1.1!important}.brand .bdesc{display:block;line-height:1.5!important;margin-top:9px}

/* Presentation flow: each chapter owns the available screen, while its content
   may grow naturally. The document remains the only page scroll container. */
:root{--ds-header-height:89px;--ds-screen-height:100vh}
@supports(height:100svh){:root{--ds-screen-height:100svh}}
@supports(height:100dvh){:root{--ds-screen-height:100dvh}}
html{scroll-padding-top:var(--ds-header-height);scroll-padding-block-start:var(--ds-header-height);scroll-snap-type:none}
main#top{scroll-margin-block-start:0}
main>section{
  min-height:calc(var(--ds-screen-height) - var(--ds-header-height));
  min-block-size:calc(var(--ds-screen-height) - var(--ds-header-height));
  height:auto;max-height:none;overflow:visible;
  display:flex;flex-direction:column;justify-content:center;
  padding-block:clamp(48px,8vh,104px)!important;
  scroll-margin-top:0!important;scroll-margin-block-start:0!important;
  scroll-snap-align:start;scroll-snap-stop:normal;
}
main>section>*{flex-shrink:0}
main>section>details{width:100%}
main>section :is([id]){scroll-margin-top:16px!important;scroll-margin-block-start:16px!important}
main :is(a,button,input,select,textarea,summary,[tabindex]){scroll-margin-block:16px}
.hero.decision-intro.decision-entry{padding-block:clamp(36px,6vh,80px)!important}
.hero.decision-intro.decision-entry>.ds-back{display:block;min-height:0;padding:0!important;margin-block:0 32px}
.hero.decision-intro.decision-entry>.wrap:not(.ds-back){flex-grow:0}
header .nav{height:auto!important;min-height:88px;padding-block:12px!important}
@media(max-width:1380px){
  header .navlinks{top:calc(100% + 1px)!important;max-height:calc(var(--ds-screen-height) - var(--ds-header-height) - 16px);overflow-y:auto;overscroll-behavior:contain}
}
@media(max-width:760px){
  main>section{padding-block:clamp(40px,7vh,65px)!important}
  .hero.decision-intro.decision-entry{padding-block:36px 48px!important}
  .hero.decision-intro.decision-entry>.ds-back{padding-inline:22px!important;margin-block-end:28px}
}
/* Proximity assists a roomy desktop; touch, short screens, expanded reading,
   keyboard focus and reduced motion retain unassisted scrolling. */
@media(min-width:901px) and (min-height:650px) and (hover:hover) and (pointer:fine) and (prefers-reduced-motion:no-preference){
  html{scroll-snap-type:y proximity}
  html:has(main details[open]),html:has(main :focus-visible){scroll-snap-type:none}
}
@media(prefers-reduced-motion:reduce){html{scroll-snap-type:none!important;scroll-behavior:auto!important}}
@media print{main>section{display:block;min-height:0;min-block-size:0;scroll-snap-align:none}header{position:static!important}}

/* Reading review: pure-white islands preserve each chapter's inner geometry.
   The background layer cannot cover controls or alter the measured chapter flow. */
:root{--ivory:#fff;--paper:#fff;--ink:#182821;--green:#173e32;--grey:#414e47;--muted:#414e47;--stone:#d6ddda;--line:#d6ddda;--bronze:#71532c;--accent:#71532c;--ds-canvas:#f3f5f6;--ds-island-border:#d3d9dc}
body{background:var(--ds-canvas)}
main>section{position:relative;z-index:0;isolation:isolate;background:var(--ds-canvas)!important;color:var(--ink);border:0}
main#top>section::before{display:block;content:"";position:absolute;z-index:-1;inset:24px max(2%,calc((100% - 1320px)/2));background:#fff;border:1px solid var(--ds-island-border);border-radius:48px;pointer-events:none}
.hero.decision-intro.decision-entry{background:var(--ds-canvas)!important}
header{background:#fff!important}
.welcome-screen{background:#fff;border:0}
.welcome-screen video{background:#fff}
.situ-panel,.prod,.prod:hover,.package-card,.fcard,.proposal-form,.decision-folio,.work-reading,.work-reading .dossier-extract,.decision-scenes,.decision-scene figcaption,.scene-controls,.cmp-col,.cmp-col.g{background:#fff!important;color:var(--ink)}
.path-sec{color:var(--ink)}
.path-sec h2{color:var(--ink)}
.path-sec .eyebrow{color:var(--bronze)!important}
.path-sec .lead,.path-detail p,.pnode,.pnode[aria-pressed="true"] .plabel{color:var(--grey)!important}
.path-detail .pd-title,.cmp-col.g h3{color:var(--green)}
.path-line{background:var(--stone)}
.path-line-fill{background:var(--green)}
.pnode .dot{background:#fff;border-color:#87978e}
.pnode[aria-pressed="true"] .dot{background:var(--green);border-color:var(--green);box-shadow:0 0 0 6px #173e3212}
.path-detail .pd-title span{color:var(--bronze)}
.cmp-col.g li{color:var(--grey);border-color:var(--stone)}
.motion-stages button:hover,.scene-buttons button:hover{background:#eef3f1}
.decision-station circle{fill:#fff}
.decision-station.is-active circle:not(.station-halo){fill:var(--green)}
.decision-station.is-active path{stroke:#fff}
.decision-scene figcaption p,.scene-controls{color:var(--grey)!important}
.founder .origin-details>summary{margin-block-end:32px}
.fcard{border-color:var(--stone);border-radius:16px}
.ds-safe-intake .depth-next{margin:20px 0 0;font-size:14px;line-height:1.8}
/* Keep nested samples compact; only main chapters receive viewport minima. */
#brief-example>.wrap>.ds-disclosure{margin:0}
@media(max-width:760px){
 main#top>section::before{inset:16px 8px;border-radius:30px}
 .founder .origin-details>summary{margin-block-end:24px}
}
@media print{body,main>section{background:#fff!important}main#top>section::before{display:none}}