/* Article-specific palette. The global shell remains the site's existing stone/cyan. */
.nav-story{--nav-ink:#e7e0d3;--nav-muted:#b9b9b1;--nav-brass:#c6ac78;--nav-line:#b4a07845;color:var(--nav-ink)}
.navigation-page .header-note{display:none}.navigation-page .reading-progress{background:#c6ac78}
.nav-opening{max-width:1440px;margin:auto;padding:clamp(2rem,5vw,5rem) var(--gutter) 1.5rem;display:grid;grid-template-columns:1.2fr 1fr;gap:1rem 3rem;align-items:center;background:radial-gradient(ellipse at 75% 50%,#31445324,transparent 60%)}
.nav-back{display:inline-block;font-size:.875rem;color:var(--accent-ink);padding:.6rem 0;min-height:44px}.nav-back:hover{text-decoration:underline}
.nav-label{font-family:var(--body);font-size:.75rem;letter-spacing:.14em;line-height:1.7;color:var(--nav-brass);font-weight:500}
.nav-opening .nav-label{margin:2rem 0 1.5rem}.nav-opening h1{font-family:Georgia,serif;font-size:clamp(3rem,5.4vw,5.3rem);line-height:1.02;font-weight:400;letter-spacing:-.035em;margin-bottom:1.5rem}.nav-opening h1 em{font-style:italic;color:var(--nav-brass)}
.nav-deck{font-size:clamp(1.1rem,1.6vw,1.3rem);max-width:31rem;color:var(--nav-muted);line-height:1.75}.nav-byline{font-size:.875rem;color:var(--nav-ink)}.nav-byline span{display:block;color:var(--nav-muted);margin-top:.25rem}.nav-opening .article-share{justify-content:flex-start;margin-top:1.5rem}.nav-frontispiece{margin:0;min-width:0}.nav-frontispiece img{width:100%;height:auto}.nav-frontispiece figcaption{font-size:.6875rem;letter-spacing:.13em;color:var(--nav-brass);border-top:1px solid var(--nav-line);padding-top:1rem}.nav-frontispiece figcaption span{display:block;font-family:Georgia,serif;letter-spacing:0;font-size:1rem;font-style:italic;color:var(--nav-muted);margin-top:.35rem}
.nav-opening-foot{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;border-top:1px solid var(--nav-line);margin-top:2rem;padding-top:1rem;font-size:.6875rem;letter-spacing:.15em;color:var(--nav-muted)}.nav-opening-foot a{font-size:.875rem;letter-spacing:0;padding:.5rem 0;min-height:44px;color:var(--nav-brass)}
.nav-contents{display:flex;flex-wrap:wrap;gap:.4rem 1.75rem;max-width:1250px;margin:0 auto;padding:1.5rem var(--gutter) 2.5rem;border-bottom:1px solid var(--nav-line)}.nav-contents a{font-size:.875rem;min-height:44px;display:flex;align-items:center;gap:.6rem}.nav-contents span{font-size:.625rem;color:var(--nav-brass)}.nav-contents a:hover{text-decoration:underline;color:var(--nav-brass)}
.nav-reading.article-body{max-width:1180px;font-size:1.125rem;line-height:1.85;padding:0 var(--gutter);color:#cfcec7}.nav-reading p{max-width:680px;margin-left:auto;margin-right:auto}.nav-prologue{padding:4.5rem 0 1rem}.nav-prologue p:first-child{font-family:Georgia,serif;font-size:clamp(1.3rem,2.2vw,1.65rem);color:var(--nav-ink);line-height:1.65}.nav-chapter{padding:3.5rem 0 1rem;scroll-margin-top:1rem}.nav-reading .nav-label{margin-bottom:1rem}.nav-reading h2{font-size:clamp(2.1rem,4vw,3.4rem);font-weight:400;line-height:1.16;color:var(--nav-ink);max-width:680px;margin:0 auto 2rem}.nav-reading h3{font-size:1.65rem;font-weight:400;line-height:1.3;max-width:680px;margin:2.5rem auto 1rem;color:var(--nav-ink)}.nav-reading em{font-style:italic;font-weight:inherit}.nav-reading strong{color:var(--nav-ink);font-weight:600}.nav-ref{font-size:.75em;white-space:nowrap;color:var(--nav-brass);text-decoration:underline;text-underline-offset:3px;padding:.2rem}.nav-ref:hover{color:white}
.nav-plate{margin:2.75rem 0 3rem;padding:clamp(1.15rem,3vw,2rem);background:#e8e2d5;color:#344a52;border:1px solid #bfae8c;box-shadow:0 12px 35px #0003;position:relative}.nav-plate::before{content:'';position:absolute;inset:7px;border:1px solid #344a5220;pointer-events:none}.nav-plate-title{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem 1rem;border-bottom:1px solid #344a5230;padding-bottom:1rem;font-size:.6875rem;letter-spacing:.12em;line-height:1.5}.nav-plate-title span:last-child{font-family:Georgia,serif;font-size:1rem;font-style:italic;letter-spacing:0}.nav-plate img{width:100%;height:auto;max-height:420px;object-fit:contain}.nav-plate figcaption{font-size:.875rem;line-height:1.65;border-top:1px solid #344a5230;padding-top:1rem;margin-top:1.2rem;max-width:720px}.nav-figure-key{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem 1rem;font-size:.8125rem}.nav-figure-key b{font-family:Georgia,serif;margin-right:.35rem;color:#785b2f}.nav-equation{display:flex;justify-content:center;align-items:center;gap:.5rem 1.2rem;flex-wrap:wrap;font-family:Georgia,serif;font-size:clamp(1.1rem,2.4vw,1.7rem);color:#344a52}.nav-equation span{color:#8e6932}
.nav-instrument{max-width:840px;margin:3rem auto 0;padding:2rem 0;border-top:1px solid var(--nav-line);border-bottom:1px solid var(--nav-line);display:grid;grid-template-columns:90px 1fr;gap:1.5rem}.nav-instrument-number{font-family:Georgia,serif;font-size:5rem;color:var(--nav-brass);line-height:1}.nav-instrument .nav-label,.nav-instrument h3{margin:0 0 1rem}.nav-instrument p{font-size:1.0625rem}.nav-instrument p:last-child{margin-bottom:0}.nav-clock{grid-template-columns:minmax(160px,240px) 1fr;align-items:center}.nav-clock img{background:#e8e2d5;width:100%;height:auto}
.nav-longitude-layout{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:1.5rem}.nav-time-demo{padding:1.5rem 0}.nav-time-demo .nav-label{color:#665337}.nav-time-demo .nav-noon{font-family:Georgia,serif;font-size:1.5rem;line-height:1.4;margin:0 0 1.5rem;color:#344a52}.nav-noon span{display:block;font-size:2.8rem}.nav-time-demo label{display:block;font-size:.875rem;margin-bottom:.5rem}.nav-time-demo select{font:inherit;font-size:1rem;width:100%;max-width:280px;background:#f6f1e7;color:#243d49;border:1px solid #62747b;border-radius:0;padding:.7rem;min-height:48px;cursor:pointer;color-scheme:light}.nav-time-demo select:focus-visible{outline:2px solid #243d49;outline-offset:4px}.nav-time-demo output{display:block;font-family:Georgia,serif;font-size:clamp(1.2rem,2vw,1.65rem);color:#7c392f;line-height:1.5;margin:1.25rem 0 .5rem}.nav-time-demo #longitude-explanation{font-size:.875rem;line-height:1.5;margin-bottom:0;min-height:3em}.nav-margin{max-width:680px;margin:2rem auto;padding:1.5rem 1.75rem;border-left:2px solid var(--nav-brass);background:#a28a4a0a}.nav-margin>span{display:block;font-size:.625rem;letter-spacing:.16em;color:var(--nav-brass);margin-bottom:.75rem}.nav-margin p{font-size:.9375rem;margin-bottom:0}
.nav-harrison{max-width:840px;margin:3rem auto;padding:2rem 0;border-top:1px solid var(--nav-line);border-bottom:1px solid var(--nav-line)}.nav-harrison>.nav-label{max-width:none}.nav-harrison ol{list-style:none;margin:0 0 1.5rem;padding:0}.nav-harrison li{display:grid;grid-template-columns:120px 1fr;gap:1.5rem;padding:1.25rem 0;border-bottom:1px solid #b4a07825}.nav-harrison li:last-child{border-bottom:0}.nav-harrison li>span{font-family:Georgia,serif;font-size:2rem;color:var(--nav-brass);line-height:1.3}.nav-harrison small{display:block;font-family:var(--body);font-size:.75rem;color:var(--nav-muted);margin-top:.2rem}.nav-harrison li p{font-size:1rem;margin:0;line-height:1.75}.nav-reading p.nav-small{font-size:.875rem;color:var(--nav-muted);max-width:none;margin-bottom:0}
.nav-tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;margin:2.5rem 0}.nav-tool-grid>div{border-top:1px solid var(--nav-line);padding-top:1.5rem}.nav-tool-grid h3{margin-top:.5rem}.nav-tool-grid p{font-size:1rem}.nav-tool-grid .nav-label{font-size:.6875rem}.nav-system{padding:2.25rem clamp(1rem,3vw,2.5rem);margin:3rem 0;background:linear-gradient(#101d25ee,#101d25ee),repeating-linear-gradient(0deg,transparent 0 39px,#b4a07855 40px);border:1px solid var(--nav-line)}.nav-system>.nav-label{max-width:none}.nav-system ol{display:grid;grid-template-columns:1fr 1fr;list-style:none;margin:0;padding:0;gap:2rem;counter-reset:steps}.nav-system li{counter-increment:steps;padding-top:1rem;border-top:1px solid var(--nav-line)}.nav-system li>span{font-family:Georgia,serif;font-size:1.4rem;color:var(--nav-ink)}.nav-system li>span::before{content:'0' counter(steps) ' / ';font: .75rem var(--body);color:var(--nav-brass)}.nav-system li p{font-size:.9375rem;line-height:1.8;margin:.75rem 0 0}
.nav-ending{margin-top:2rem;padding-bottom:3.5rem;background-image:linear-gradient(90deg,transparent,#c6ac7807,transparent)}.nav-last-mark{display:flex;align-items:center;justify-content:center;gap:1rem;margin:3rem auto 2rem}.nav-last-mark span{width:80px;height:1px;background:var(--nav-line)}.nav-last-mark i{width:10px;height:10px;border-radius:100%;background:var(--accent-edge);box-shadow:0 0 0 6px #64d8e812,0 0 0 25px #64d8e807}.nav-reading .nav-closing-line{text-align:center;font-family:Georgia,serif;font-style:italic;font-size:1.6rem;color:var(--nav-brass);line-height:1.5}
.nav-sources{max-width:1180px;margin:2rem auto 0;padding:3rem var(--gutter);border-top:1px solid var(--nav-line)}.nav-sources h2{font-family:Georgia,serif;font-size:2rem;font-weight:400}.nav-sources>p:not(.nav-label){max-width:730px;font-size:.9375rem;color:var(--nav-muted)}.nav-source-list{display:grid;grid-template-columns:1fr 1fr;gap:0 2rem;padding-left:1.5rem;font-size:.875rem}.nav-source-list li{padding:1rem 0;line-height:1.6;border-bottom:1px solid var(--nav-line);scroll-margin-top:1rem}.nav-source-list li::marker{color:var(--nav-brass)}.nav-source-list a{display:block;text-decoration:underline;text-underline-offset:3px;color:var(--nav-ink);overflow-wrap:anywhere}.nav-source-list span{display:block;color:var(--nav-muted);font-size:.8125rem;margin-top:.25rem}.nav-source-list li:target{background:#c6ac7812;outline:1px solid var(--nav-brass);outline-offset:5px}.nav-sources details{border-block:1px solid var(--nav-line);padding:1rem 0;margin:2rem 0;color:var(--nav-muted);font-size:.9375rem}.nav-sources summary{cursor:pointer;color:var(--nav-ink);padding:.5rem 0;min-height:44px}.nav-sources details p{margin:1rem 0;max-width:760px}.nav-next{display:block;max-width:1050px;margin:1rem auto 4rem;padding:2rem var(--gutter);border-block:1px solid var(--nav-line);background:#10212b44}.nav-next>span{font-size:.6875rem;letter-spacing:.15em;color:var(--nav-brass)}.nav-next h2{font-size:2.5rem;font-weight:400;margin:.8rem 0}.nav-next p{color:var(--nav-muted);margin:0}.nav-next:hover{border-color:var(--nav-brass)}
@media(max-width:800px){.nav-opening{gap:1rem 1.5rem;grid-template-columns:1.3fr 1fr}.nav-opening h1{font-size:clamp(2.7rem,6vw,4rem)}.nav-frontispiece{align-self:center}.nav-source-list{grid-template-columns:1fr}.nav-clock{grid-template-columns:180px 1fr}}
@media(max-width:600px){.nav-opening{grid-template-columns:1fr;padding-top:1.5rem}.nav-opening h1{font-size:clamp(2.8rem,12.5vw,4rem)}.nav-opening .nav-label{margin-top:1.2rem}.nav-frontispiece{width:100%;max-width:390px;margin:1rem auto 0}.nav-frontispiece img{max-height:340px;object-fit:contain}.nav-opening-foot{margin-top:1rem}.nav-contents{gap:.4rem 1.25rem;padding-block:1rem 1.5rem}.nav-contents a{font-size:.8125rem}.nav-reading.article-body{font-size:1.0625rem;line-height:1.85}.nav-prologue{padding-top:2.5rem}.nav-chapter{padding-top:2.5rem}.nav-reading h2{font-size:2.15rem;margin-bottom:1.5rem}.nav-reading h3{font-size:1.5rem}.nav-plate{margin:2rem 0}.nav-plate-title{font-size:.625rem}.nav-plate-title span:last-child{font-size:.875rem}.nav-figure-key{display:grid;gap:.4rem;font-size:.875rem}.nav-longitude-layout{grid-template-columns:1fr;gap:0}.nav-longitude-layout img{max-height:290px}.nav-time-demo{padding:.5rem 0}.nav-time-demo select{max-width:none}.nav-time-demo .nav-noon{display:flex;justify-content:space-between;align-items:center;font-size:1.2rem}.nav-noon span{font-size:2rem}.nav-instrument{grid-template-columns:1fr;gap:1rem;padding:1.5rem 0}.nav-instrument-number{font-size:2.5rem}.nav-clock img{max-width:220px;margin:0 auto 1rem}.nav-instrument p{font-size:1.0625rem}.nav-margin{padding:1.25rem}.nav-harrison li{grid-template-columns:75px 1fr;gap:1rem}.nav-harrison li p{font-size:.9375rem}.nav-tool-grid,.nav-system ol{grid-template-columns:1fr;gap:1.5rem}.nav-sources{padding-top:2rem}.nav-next{margin-inline:var(--gutter);padding-inline:1rem}.nav-equation{display:block;text-align:center;font-size:1.15rem}.nav-equation span{display:block}.nav-source-list{padding-left:1.25rem}}
@media(prefers-reduced-motion:reduce){.navigation-page{scroll-behavior:auto}.navigation-page *, .navigation-plaque{animation:none!important;transition:none!important}.navigation-plaque:hover{transform:none}}
@media(forced-colors:active){.nav-plate,.nav-time-demo select{background:Canvas;color:CanvasText}.nav-ref,.nav-source-list a{color:LinkText}}
@media print{.nav-contents,.nav-opening-foot,.nav-back,.nav-next,.article-share,.reading-progress{display:none!important}.nav-story{--nav-ink:#222;--nav-muted:#444;--nav-brass:#644820;--nav-line:#888;color:#222}.nav-opening,.nav-reading.article-body,.nav-sources{max-width:none;padding:1rem 0;color:#222}.nav-opening{display:block}.nav-opening h1{font-size:36pt}.nav-frontispiece{display:none}.nav-reading p{font-size:11pt;max-width:none}.nav-chapter{padding-top:1rem}.nav-reading h2{font-size:24pt}.nav-plate{break-inside:avoid;box-shadow:none}.nav-source-list{display:block}.nav-system{background:none}.nav-time-demo select{appearance:none}.nav-ref{color:#644820}}

/* The coordinate grid becomes complete in a separate closing engraving. */
.nav-last-mark{width:min(100%,320px);padding:3rem 0;border:1px solid var(--nav-line);background:repeating-linear-gradient(0deg,transparent 0 23px,#c6ac781a 24px),repeating-linear-gradient(90deg,transparent 0 39px,#c6ac781a 40px)}
/* Museum photographs preserve whole objects and include visible reuse credits. */
.nav-photo{margin:0;min-width:0;border:1px solid var(--nav-line);background:#10202a}
.nav-photo img{display:block;width:100%;height:auto;max-height:none;object-fit:contain}
.nav-photo figcaption{padding:1.15rem 1.25rem;margin:0;border-top:1px solid var(--nav-line);font: .9375rem/1.65 var(--body);letter-spacing:0;color:var(--nav-muted)}
.nav-photo figcaption .nav-photo-title{display:block;font:1.25rem/1.4 Georgia,serif;color:var(--nav-brass);margin:0 0 .6rem;letter-spacing:0;font-style:normal}
.nav-photo small{display:block;font-size:.75rem;line-height:1.6;margin-top:.8rem}.nav-photo a{text-decoration:underline;text-underline-offset:3px;color:inherit}
.nav-photo-pair{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:3rem 0}.nav-photo-pair img{aspect-ratio:4/3;object-fit:contain}
.nav-harrison>p:last-child{max-width:none;font-size:1rem;margin-bottom:0}.nav-plate-title{font-size:.75rem}.nav-contents span{font-size:.75rem}
@media(max-width:600px){.nav-photo-pair{grid-template-columns:1fr;gap:1.5rem}.nav-frontispiece.nav-photo{max-width:none}.nav-frontispiece.nav-photo img{max-height:none}.nav-photo figcaption{padding:1rem}.nav-plate-title{font-size:.75rem}.nav-plate-title span:last-child{font-size:.9375rem}}