/* Shared publication geometry comes from the unchanged Atlas book styles. */
html.mechanica-embedded,html.mechanica-embedded body{background:transparent}
.mechanica-embedded #desk{position:relative;z-index:1;background:transparent}
#entry-backdrop{position:fixed;inset:0;z-index:0;background:radial-gradient(ellipse at 50% 45%,#456765,#1b3032 75%);pointer-events:none}
.mechanica-waiting #entry-backdrop{opacity:0}.mechanica-waiting #desk{visibility:hidden}
.mechanica-embedded.in-flight #desk{visibility:visible}.mechanica-embedded.in-flight #book-object{visibility:visible;z-index:20;transform-origin:100% 50%;transition:none}
.mechanica-embedded.in-flight #desk>.eyebrow{opacity:0}
.spine-flight{position:fixed;z-index:25;pointer-events:none;filter:drop-shadow(7px 10px 9px #10272799);transform-origin:50% 65%}
#book-object .book-spine,.book-edge-spine{background:linear-gradient(90deg,#183c3d,#48796f 55%,#2c514d);border-right-color:#244746}
.book-back{background:linear-gradient(90deg,#244746 0 14%,#b1a180 14%)}
#open-book .book-cover strong{font-size:calc(var(--book-h)*.082);line-height:.98;letter-spacing:-.045em}
#open-book .book-edition{font-size:calc(var(--book-h)*.013);letter-spacing:.03em}
#open-book .cover-drawing{top:calc(var(--book-h)*.024);height:89%}
#open-book .book-bottom{font-size:calc(var(--book-h)*.0125);gap:5px}
#open-book:focus-visible{outline:3px solid #e0b95c;outline-offset:7px}
html:not(.in-flight) #book-object:has(#open-book:hover),html:not(.in-flight) #book-object:has(#open-book:focus-visible){transform:perspective(var(--book-perspective)) rotateY(-11deg) rotateX(5deg) rotateZ(-3deg) translateY(-4px)}
#catalogue-reader{position:fixed;inset:0;width:100%;height:100dvh;max-width:none;max-height:100dvh;margin:0;padding:0;border:0;overflow:hidden;background:#f4f1e6;box-shadow:none}
#catalogue-reader[open]{display:grid;grid-template-rows:minmax(0,1fr);animation:open-plate .45s cubic-bezier(.16,1,.3,1)}
#catalogue-stage{min-height:0;position:relative;display:grid;place-items:center}
#catalogue-stage iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#f4f1e6}
#catalogue-status{color:#50635e;font-size:15px;margin:20px}
#retry-catalogue{padding:10px 18px;border:1px solid #41655d;background:transparent}
@media(prefers-reduced-motion:reduce){#catalogue-reader[open]{animation:none}#book-object:has(#open-book:hover){transform:perspective(var(--book-perspective)) rotateY(-15deg) rotateX(7deg) rotateZ(-4deg)}}

/* Loading and failure keep a dismiss action until the catalogue owns it. */
#close-book{position:absolute;top:8px;right:14px;z-index:1;width:44px;height:44px;padding:0;border:0;background:none;color:#223d3d;font:200 36px/1 Arial,sans-serif}
#catalogue-reader.catalogue-ready #close-book{display:none}