/* All rules belong exclusively to the Origin section. */
#origin .origin-intro{display:grid;grid-template-columns:1.1fr 1fr;gap:6vw;align-items:end;margin-bottom:52px}
#origin .origin-intro h2{font-size:clamp(40px,4.5vw,68px)}
#origin .origin-intro .lead{max-width:440px;font-size:clamp(18px,1.6vw,23px);color:#c3c7bb}
#origin .origin-volume{max-width:1080px;margin:0 auto}
#origin .volume-heading{display:flex;justify-content:space-between;align-items:center;margin:0 4px 16px;color:#919a83}
#origin .volume-heading .micro{font-size:8px;letter-spacing:.17em}
#origin .volume-heading .volume-mark{color:var(--gold);font-family:var(--serif);font-style:italic;font-size:15px;letter-spacing:.03em}
#origin .origin-book{position:relative;isolation:isolate;perspective:1600px;border:1px solid #c5b3583b;background:#0d100d;box-shadow:0 18px 65px #0004;margin-bottom:10px}
#origin .origin-book:before,#origin .origin-book:after{content:"";position:absolute;z-index:-1;inset:5px -4px -5px 4px;border:1px solid #c5b35828;background:#0d100d;pointer-events:none}
#origin .origin-book:after{inset:9px -7px -9px 7px;border-color:#c5b35819;z-index:-2}
#origin .origin-pages{display:grid;position:relative;overflow:hidden;min-width:0;background:#0d100d}
#origin .origin-chapter{grid-area:1/1;display:grid;grid-template-columns:1fr 1fr;min-width:0;backface-visibility:hidden;background:#0d100d;transform-origin:left center}
#origin .origin-chapter[hidden]{display:grid;visibility:hidden;pointer-events:none}
#origin .origin-plate{position:relative;min-height:438px;overflow:hidden;background:radial-gradient(ellipse at 50% 55%,#20291835,transparent 70%);border-right:1px solid #c5b35826}
#origin .origin-plate:after{content:"";position:absolute;top:0;bottom:0;right:0;width:24px;background:linear-gradient(90deg,transparent,#0005);pointer-events:none}
#origin .origin-plate canvas{position:absolute;inset:0;width:100%;height:100%}
#origin .plate-label,#origin .plate-caption{position:absolute;left:28px;right:28px;z-index:1;pointer-events:none;font-size:7px;letter-spacing:.16em;color:#88947b;line-height:1.7}
#origin .plate-label{top:27px;display:flex;justify-content:space-between;gap:16px}
#origin .plate-label span:last-child{color:#c5b358a6}
#origin .plate-caption{bottom:24px;text-align:center;color:#b4b59b}
#origin .origin-leaf{position:relative;padding:37px 38px 49px;display:flex;flex-direction:column;justify-content:center;min-width:0;background:linear-gradient(90deg,#0003,transparent 18%)}
#origin .chapter-kicker{display:flex;gap:12px;align-items:center;color:#9ca48e;font-size:8px;letter-spacing:.15em;margin-bottom:22px;text-transform:uppercase}
#origin .chapter-kicker .chapter-number{color:var(--gold);font-family:var(--serif);font-size:17px;letter-spacing:0;border-right:1px solid #c5b35840;padding-right:13px}
#origin .origin-leaf h3{font-family:var(--serif);font-size:clamp(30px,3.2vw,44px);font-weight:400;line-height:1.1;letter-spacing:-.035em;color:var(--cream);margin:0 0 8px}
#origin .chapter-author{font-size:9px;letter-spacing:.1em;color:#8d9881;margin-bottom:24px}
#origin .origin-leaf .body-copy{font-size:13px;line-height:1.85;color:#a7ad9e;margin-bottom:14px}
#origin .origin-leaf .body-copy:last-of-type{margin-bottom:0}
#origin .origin-leaf em{font-style:normal;color:#d3c890}
#origin .leaf-folio{position:absolute;bottom:19px;left:38px;right:30px;display:flex;align-items:center;justify-content:space-between;color:#68725f;font-size:7px;letter-spacing:.15em}
#origin .leaf-folio span:last-child{font-family:var(--serif);font-size:11px;color:#a69e71}
#origin .chapter-controls{display:grid;grid-template-columns:1fr 28px 1fr 28px 1fr;max-width:450px;align-items:start;margin:32px auto 0}
#origin .chapter-button{display:flex;flex-direction:column;align-items:center;gap:10px;padding:4px 0 9px;min-width:0;color:#7f8a74;touch-action:manipulation}
#origin .chapter-button .chapter-circle{width:43px;height:43px;display:grid;place-items:center;border:1px solid #c5b35838;border-radius:50%;font-family:var(--serif);font-size:16px;color:#a3a58b;transition:border-color .3s,color .3s,background .3s,box-shadow .3s}
#origin .chapter-button[aria-selected="true"] .chapter-circle{border-color:#c5b358a6;color:#e0d08e;background:#c5b3580d;box-shadow:0 0 24px #c5b3580b}
#origin .chapter-button:hover .chapter-circle{border-color:var(--gold);color:var(--gold)}
#origin .chapter-button .chapter-name{font-size:9px;letter-spacing:.06em}
#origin .chapter-button[aria-selected="true"] .chapter-name{color:#cdc9ae}
#origin .chapter-arrow{font-size:16px;color:#c5b35865;text-align:center;padding-top:14px}
#origin .origin-closing{display:flex;align-items:center;justify-content:space-between;gap:25px;border-top:1px solid #c5b35821;padding-top:27px;margin-top:30px}
#origin .origin-closing .origin-footnote{margin:0;font-size:10px}
#origin .origin-closing>.micro{font-size:7px;letter-spacing:.12em;color:#707c65;text-align:right}
#origin .origin-turning .origin-chapter{will-change:transform,opacity}
@media(max-width:1000px){#origin .origin-leaf{padding:30px 27px 49px}#origin .origin-leaf .body-copy{font-size:12px}#origin .origin-plate{min-height:440px}#origin .leaf-folio{left:27px}}
@media(max-width:700px){#origin .section-top{margin-bottom:38px}#origin .origin-intro{grid-template-columns:1fr;gap:24px;margin-bottom:35px}#origin .origin-intro h2{font-size:43px}#origin .origin-intro .lead{font-size:19px;line-height:1.55;max-width:340px}#origin .volume-heading{margin:0 1px 13px}#origin .volume-heading .micro{font-size:6px;letter-spacing:.13em}#origin .volume-heading .volume-mark{font-size:13px}#origin .origin-chapter{grid-template-columns:1fr;grid-template-rows:auto 1fr}#origin .origin-plate{min-height:0;height:auto;aspect-ratio:1.38;border-right:0;border-bottom:1px solid #c5b35826}#origin .origin-plate:after{top:auto;left:0;right:0;bottom:0;width:auto;height:20px;background:linear-gradient(transparent,#0003)}#origin .plate-label{top:18px;left:19px;right:19px;font-size:6px;letter-spacing:.12em}#origin .plate-caption{bottom:15px;left:17px;right:17px;font-size:6px;letter-spacing:.11em}#origin .origin-leaf{padding:26px 24px 47px;justify-content:start;background:linear-gradient(#0002,transparent 12%)}#origin .chapter-kicker{margin-bottom:15px;font-size:7px;gap:10px}#origin .chapter-kicker .chapter-number{font-size:15px;padding-right:10px}#origin .origin-leaf h3{font-size:34px}#origin .chapter-author{font-size:8px;margin-bottom:19px}#origin .origin-leaf .body-copy{font-size:13px;line-height:1.85;margin-bottom:13px}#origin .leaf-folio{bottom:16px;left:24px;right:24px;font-size:6px}#origin .chapter-controls{grid-template-columns:1fr 20px 1fr 20px 1fr;margin-top:27px}#origin .chapter-name{font-size:8px}#origin .origin-closing{margin-top:23px;padding-top:23px;align-items:start}#origin .origin-closing>.micro{font-size:6px;max-width:95px;line-height:1.9}#origin .origin-closing .origin-footnote{font-size:9px}}
@media(prefers-reduced-motion:reduce){#origin .origin-chapter{transform:none!important;opacity:1!important}}

/* Retained v4 Dune diagram and a separately hinged, two-sided leaf. */
#origin .origin-prescience{position:absolute;inset:35px 16px 31px;width:calc(100% - 32px);height:calc(100% - 66px);overflow:visible}
#origin .origin-prescience .diagram-text{font-size:12px}
#origin .dune-caption{display:flex;justify-content:space-between;gap:12px;font-size:6px}
#origin .origin-pages{perspective:1800px;overflow:hidden}
#origin .origin-turn-sheet{position:absolute;top:0;bottom:0;width:50%;z-index:5;transform-style:preserve-3d;pointer-events:none;will-change:transform}
#origin .turn-right{left:50%;transform-origin:left center}
#origin .turn-left{left:0;transform-origin:right center}
#origin .turn-face{position:absolute;inset:0;backface-visibility:hidden;background:#0d100d;overflow:hidden}
#origin .turn-back{transform:rotateY(180deg)}
#origin .turn-face:after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,#0006,transparent 20%,transparent 75%,#c5b3580e);border:1px solid #c5b35826}
#origin .turn-face>.origin-leaf,#origin .turn-face>.origin-plate{width:100%;height:100%;min-height:0;box-sizing:border-box}
#origin .origin-turn-stationary{position:absolute;top:0;bottom:0;width:50%;z-index:3;background:#0d100d;pointer-events:none}
#origin .hold-left{left:0}#origin .hold-right{right:0}
#origin .origin-turn-stationary>.origin-leaf,#origin .origin-turn-stationary>.origin-plate{width:100%;height:100%;min-height:0}
#origin .origin-turning .origin-chapter{will-change:auto}
#origin .turn-full{left:0;width:100%;transform-origin:left center}
#origin .turn-full .turn-front>.origin-chapter{display:grid;visibility:visible;height:100%;width:100%;min-height:0}
#origin .turn-full .turn-back{background:linear-gradient(90deg,#0d100d,#151910 85%,#c5b35819);border:1px solid #c5b35830}
@media(max-width:700px){#origin .origin-plate{aspect-ratio:1.08}#origin .origin-prescience{inset:30px 13px 32px;width:calc(100% - 26px);height:calc(100% - 62px)}#origin .origin-prescience .diagram-text{font-size:15px}#origin .dune-caption{font-size:5.5px}#origin .origin-turn-sheet .plate-label{font-size:6px}}
@media(prefers-reduced-motion:reduce){#origin .origin-turn-sheet,#origin .origin-turn-stationary{display:none}}