/* Reader: a stationary frame, a dimensional cover, and a quiet editorial guide. */
#reader{--reading-ink:#303030;--reading-body:#505050;--reading-muted:#737373;--reading-rule:#dcdcdc;position:fixed;inset:0;width:min(1180px,94vw);height:min(860px,94dvh);max-height:94dvh;margin:auto;overflow-anchor:none}
#reader[open]{display:flex;flex-direction:column;overflow:visible;animation:none}
#reader .reader-toolbar{height:64px;flex:none;padding:0 0 20px;margin-bottom:24px;border-bottom:1px solid #d3d3d3;color:var(--reading-muted);font:400 12px/1.5 Arial,Helvetica,sans-serif;letter-spacing:.07em}
#reader .reader-actions{display:flex;align-items:center;gap:28px;margin-left:auto}
#reader .reader-toolbar button{font:400 14px/1.5 Arial,Helvetica,sans-serif;letter-spacing:0;color:#474747;gap:10px}
#reader .reader-toolbar #reader-random{border:1px solid #c5c5c5;border-radius:22px;padding:9px 16px;white-space:nowrap;transition:background .18s,border-color .18s}
#reader .reader-toolbar #reader-random:hover:not(:disabled){background:#f9f9f9;border-color:#999999;color:#262626}
#reader .reader-toolbar svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.3;stroke-linecap:round;stroke-linejoin:round}
#reader .reader-toolbar #close-reader span{font-size:20px;font-weight:400}
#reader .reader-body{flex:1 1 0;min-height:0;overflow:hidden;display:flex;flex-direction:column;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-gutter:auto;padding:8px;margin:-8px;overflow-anchor:none}
#reader.is-opening .reader-body,#reader.is-returning .reader-body{overflow:visible}
#reader .open-book{flex:1 1 0;display:grid;grid-template-columns:1fr 1.12fr;height:100%;min-height:0;max-height:none;align-items:stretch;overflow:visible;gap:32px}
#reader .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}

/* The cover interaction and its physical geometry are unchanged. */
#reader .left-page{display:grid;grid-template-rows:minmax(0,1fr) 156px;gap:20px;min-height:0;height:100%;padding:22px 30px 18px;align-items:center;justify-content:normal;justify-items:center;overflow:visible}
#reader .left-page #book-illustration{display:grid;place-items:center;width:100%;height:100%;min-height:0;max-height:none;flex:none;margin:0;overflow:visible}
#reader .book-object,#reader .book-object:has(.actual-cover){width:min(350px,var(--native-limit,350px),calc(min(38dvh,360px) * var(--ratio)),80%);max-height:100%}
#reader .book-caption{order:2;align-self:start;justify-self:center;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:16px;width:100%;height:156px;margin:0;padding-top:32px;text-align:center;overflow:visible;position:relative;z-index:2}
#reader .book-category{display:flex;align-items:center;justify-content:center}
#reader .book-caption .category-tag{order:initial;margin:0;padding:5px 12px;border:1px solid #d0d0d0;border-radius:3px;background:transparent;font:400 12px/1.4 Arial,Helvetica,sans-serif;letter-spacing:.03em;color:#626262;text-transform:none}
#reader .cover-actions{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}
#reader .save-button{padding:3px 0;font:400 14px/1.5 Arial,Helvetica,sans-serif;color:#505050;white-space:nowrap}
#reader .save-button span{font-size:16px;margin-right:5px}
#reader .save-button[aria-pressed=true]{color:#282828}
#reader .cover-details{position:relative;text-align:left}
#reader .cover-details[hidden]{display:none}
#reader .cover-details summary{display:flex;align-items:center;gap:8px;list-style:none;cursor:pointer;padding:3px 0;font:400 13px/1.5 Arial,Helvetica,sans-serif;color:#737373;white-space:nowrap}
#reader .cover-details summary::-webkit-details-marker{display:none}
#reader .cover-details summary span{font-size:17px;font-weight:300;transition:transform .18s}
#reader .cover-details[open] summary span{transform:rotate(45deg)}
#reader .cover-details summary:hover{color:#2f2f2f}
#reader .cover-details summary:focus-visible{outline:2px solid #767676;outline-offset:5px}
#reader .cover-details-panel{position:absolute;bottom:calc(100% + 16px);left:50%;transform:translateX(-50%);width:min(320px,72vw);padding:20px 22px;background:#f9f9f9;border:1px solid #d5d5d5;box-shadow:0 10px 28px #252a1f13;border-radius:4px;z-index:5}
#reader .book-caption .cover-credit{text-align:left;margin:0;font:400 13px/1.65 Arial,Helvetica,sans-serif;color:#646464;overflow-wrap:anywhere}
#reader .cover-edition{display:block;font:400 13px/1.65 Arial,Helvetica,sans-serif;margin-top:10px;color:#757575}

/* Bounded tracks keep the tabs and page controls in place between books. */
#reader .right-page{display:grid;grid-template-rows:148px auto minmax(0,1fr) auto;min-height:0;height:100%;padding:34px 40px 24px;background:#f9f9f9;border:0;border-radius:2px;box-shadow:0 2px 12px #32332303;overflow:hidden}
#reader .reader-heading{min-height:0;overflow:auto;scrollbar-width:thin;scrollbar-gutter:stable;padding-right:8px;margin-bottom:18px;overflow-anchor:none}
#reader .right-page #book-title{font:400 35px/1.13 Georgia,'Times New Roman',serif;letter-spacing:-.035em;margin:0 0 12px;color:var(--reading-ink)}
#reader .right-page #book-author{font:400 15px/1.5 Arial,Helvetica,sans-serif;color:var(--reading-muted);margin:0 0 12px}
#reader .book-edition{font:400 13px/1.5 Arial,Helvetica,sans-serif;color:var(--reading-muted);margin:0 0 12px}
#reader .reader-tabs{display:flex;justify-content:flex-start;gap:24px;flex-wrap:nowrap;margin:0 0 28px;border-bottom:1px solid var(--reading-rule)}
#reader .reader-tabs button{font:400 14px/1.45 Arial,Helvetica,sans-serif;color:#757575;padding:10px 0 14px;border-bottom:1px solid transparent;letter-spacing:0}
#reader .reader-tabs button[aria-current=page]{font-weight:500;color:#2f2f2f;border-bottom-color:#525252}
#reader .reader-tabs button:hover{color:#2f2f2f}
#reader .page-content{min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;scrollbar-width:thin;scrollbar-color:#cacaca transparent;overflow-anchor:none;padding-right:10px}
#reader .reading-content{max-width:48ch;padding-bottom:12px}
#reader .page-content h3{font:400 25px/1.22 Georgia,serif;letter-spacing:-.025em;color:var(--reading-ink);margin:0 0 22px}
#reader .page-content p{font:400 16px/1.75 Arial,Helvetica,sans-serif;color:var(--reading-body);margin:0 0 18px;max-width:none}
#reader .page-content .lead-copy{font:400 23px/1.5 Georgia,serif;letter-spacing:-.012em;color:#3b3b3b;margin:0;max-width:35ch}
#reader .page-content h4{font:500 12px/1.5 Arial,Helvetica,sans-serif;letter-spacing:.07em;color:#757575;text-transform:uppercase;margin:0 0 12px}
#reader .reading-section{margin-top:30px}
#reader .reading-section p{margin-bottom:0}
#reader .idea-list{margin:0;padding:0;list-style:none}
#reader .idea-list li{display:grid;grid-template-columns:24px 1fr;gap:16px;padding:20px 0;border-top:1px solid var(--reading-rule);color:var(--reading-body)}
#reader .idea-list li:first-child{padding-top:0;border-top:0}
#reader .idea-list li:before{content:counter(ideas,decimal-leading-zero);font:400 13px/1.75 Arial,Helvetica,sans-serif;color:#898989;padding-top:2px;font-variant-numeric:tabular-nums}
#reader .idea-list li p{margin:0}
#reader .page-content .guide-footnote{font:400 13px/1.6 Arial,Helvetica,sans-serif;color:var(--reading-muted);margin:18px 0 0}
#reader .find-book{margin-top:30px;padding-top:22px;border-top:1px solid var(--reading-rule)}
#reader .source-links{display:flex;flex-wrap:wrap;gap:10px 24px;padding:0;font:400 14px/1.6 Arial,Helvetica,sans-serif}
#reader .source-links a,#reader .reference-links a{color:#535353;text-decoration:underline;text-decoration-color:#bdbdbd;text-underline-offset:5px;text-decoration-thickness:1px}
#reader .source-links a:hover,#reader .reference-links a:hover{text-decoration-color:currentColor}
#reader .reference-links{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:18px;font:400 13px/1.6 Arial,Helvetica,sans-serif}
#reader .page-content .section-intro{margin:0 0 22px}
#reader .connection{display:flex;align-items:center;gap:20px;padding:22px 0;border-top:1px solid var(--reading-rule);text-align:left}
#reader .connection-copy{display:block;min-width:0;flex:1}
#reader .connection strong{display:block;font:400 21px/1.3 Georgia,serif;color:var(--reading-ink)}
#reader .connection small{display:block;font:400 13px/1.5 Arial,Helvetica,sans-serif;color:var(--reading-muted);margin-top:8px}
#reader .connection .arrow{flex:none;font-size:20px;color:var(--reading-muted);transition:transform .2s}
#reader .connection:hover .arrow{transform:translateX(3px)}
#reader .connection:hover strong{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
#reader .practice-note{border-left:0;padding-left:0}
#reader .connection .mini-spine{display:none}
#reader .page-navigation{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;border-top:1px solid var(--reading-rule);padding-top:16px;margin-top:24px}
#reader .page-navigation button{font:400 13px/1.5 Arial,Helvetica,sans-serif;padding:8px 0;color:#545454;white-space:nowrap}
#reader #page-prev{text-align:left}
#reader #page-next{text-align:right}
#reader .page-navigation button span{margin:0 8px}
#reader .page-navigation>span{font:400 12px/1.5 Arial,Helvetica,sans-serif;color:#8a8a8a;font-variant-numeric:tabular-nums}
#reader .reader-note{display:flex;justify-content:space-between;align-items:center;gap:20px;flex:none;margin:20px 0 6px;padding:0;font:400 12px/1.5 Arial,Helvetica,sans-serif;color:#818181;letter-spacing:0;text-align:left}
#reader .reader-note span{padding:0}
#reader .reader-note i{font-style:normal;margin:0 10px}

@media(max-width:1000px) and (min-width:681px){
 #reader .open-book{gap:14px;grid-template-columns:.85fr 1.15fr}
 #reader .left-page{padding-left:18px;padding-right:18px}
 #reader .right-page{padding:28px;grid-template-rows:144px auto minmax(0,1fr) auto}
 #reader .right-page #book-title{font-size:30px}
 #reader .reader-tabs{gap:18px}
 #reader .reader-tabs button{font-size:13px}
 #reader .page-content .lead-copy{font-size:21px}
 #reader .cover-actions{gap:10px}
}
@media(max-width:800px) and (min-width:681px){
 #reader .reader-tabs{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}
 #reader .reader-tabs button{text-align:left}
 #reader .page-navigation{gap:8px}
 #reader .page-navigation button{font-size:12px}
 #reader .reader-keyboard{display:none}
}
@media(max-width:680px){
 #reader{height:94dvh}
 #reader .reader-toolbar{height:58px;margin-bottom:14px;padding-bottom:14px;letter-spacing:0}
 #reader #reader-index{display:none}
 #reader .reader-actions{width:100%;justify-content:space-between;gap:14px}
 #reader .reader-toolbar button{font-size:13px}
 #reader .reader-toolbar #reader-random{padding:8px 13px}
 #reader .reader-body{display:block;overflow:auto;scrollbar-gutter:stable}
 #reader .open-book{height:auto;min-height:100%;display:flex;gap:0;overflow:visible}
 #reader .left-page{height:420px;flex:none;grid-template-rows:240px 128px;gap:12px;padding:18px 24px 22px}
 #reader .book-object,#reader .book-object:has(.actual-cover){width:min(280px,var(--native-limit,280px),calc(220px * var(--ratio)),80%)}
 #reader .book-caption{height:128px;padding-top:24px;gap:12px}
 #reader .right-page{height:auto;min-height:580px;display:block;padding:30px 24px;overflow:visible}
 #reader .reader-heading{height:142px;margin-bottom:16px}
 #reader .right-page #book-title{font-size:31px}
 #reader .reader-tabs{justify-content:space-between;gap:12px;margin-bottom:26px}
 #reader .reader-tabs button{font-size:13px}
 #reader .page-content{overflow:visible;padding-right:0;scrollbar-gutter:auto}
 #reader .page-content .lead-copy{font-size:22px}
 #reader .page-content h3{font-size:24px}
 #reader .reader-note{display:none}
}
@media(max-width:380px){
 #reader .reader-tabs{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}
 #reader .reader-tabs button{text-align:left}
 #reader .page-navigation{gap:8px}
 #reader .page-navigation button{font-size:12px}
}
@media(min-width:681px) and (max-height:670px){
 #reader .reader-toolbar{height:54px;padding-bottom:14px;margin-bottom:16px}
 #reader .left-page{grid-template-rows:minmax(0,1fr) 126px;padding-top:12px;padding-bottom:10px;gap:8px}
 #reader .book-caption{height:126px;padding-top:20px;gap:12px}
 #reader .book-object,#reader .book-object:has(.actual-cover){width:min(280px,var(--native-limit,280px),calc(31dvh * var(--ratio)),75%)}
 #reader .right-page{padding-top:20px;padding-bottom:14px;grid-template-rows:106px auto minmax(0,1fr) auto}
 #reader .reader-tabs{margin-bottom:16px}
 #reader .page-navigation{margin-top:12px;padding-top:8px}
 #reader .reader-note{margin-top:14px}
}
@media(prefers-reduced-motion:reduce){#reader .reader-toolbar button,#reader .cover-details summary span,#reader .connection .arrow{transition:none}}

/* Crop only the presentation; original cover pixels stay intact. */
.cropped-cover{display:block;position:relative;overflow:hidden;aspect-ratio:var(--crop-ratio)}
.cropped-cover .cover-source{position:absolute;inset:0;max-width:none!important;max-height:none!important;object-fit:fill;transform-origin:0 0;opacity:0}
.cropped-cover.crop-ready .cover-source{opacity:1}
.cropped-cover.tooltip-cover{height:auto;max-height:none}