:root{--bg:#f5f3ed;--surface:#fffef9;--ink:#253c3e;--muted:#657373;--line:#dcded6;--accent:#a57640;--size:21px;--leading:1.8;--font:Georgia,'Times New Roman',serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,sans-serif}body[data-theme=sepia]{--bg:#e9dfcd;--surface:#f6ecda;--ink:#483b2d;--line:#d3c5ac;--muted:#78634e}body[data-theme=dark]{--bg:#172225;--surface:#202f32;--ink:#eee9dc;--line:#3b4a4b;--muted:#abb7b3}button,a,input,select{-webkit-tap-highlight-color:transparent}button,select,input{font:inherit}button{color:inherit;background:transparent;border:1px solid transparent;border-radius:5px;cursor:pointer;min-height:42px;padding:8px 12px}button:hover{background:var(--line)}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}header{height:80px;position:fixed;top:0;left:0;right:0;z-index:10;border-bottom:1px solid var(--line);background:var(--surface);display:flex;align-items:center;padding:0 28px;gap:16px}.brand{font:32px Georgia,serif;text-decoration:none;display:flex;align-items:center;gap:24px}.brand span{font:10px Arial,sans-serif;letter-spacing:2px;color:var(--muted)}.tools{margin-left:auto;display:flex;gap:8px}.tools #mark{font-size:27px}.tools #settingsOpen{font-family:Georgia,serif;font-size:23px}#sidebar{position:fixed;top:80px;bottom:64px;left:0;width:290px;overflow:auto;background:var(--surface);border-right:1px solid var(--line);padding:24px;z-index:11}.sidehead{display:flex;align-items:center;justify-content:space-between;font-size:9px;letter-spacing:2px;color:var(--muted)}.bookidentity{display:flex;gap:16px;align-items:center;margin:20px 0 28px}.bookidentity img{width:72px;box-shadow:0 5px 12px #0002}.bookidentity h1{font:26px Georgia,serif;margin:0}.bookidentity p{font-size:12px;color:var(--muted)}.bookidentity button{font-size:10px;padding:0;min-height:30px}nav button{width:100%;text-align:left;padding:13px 8px;display:flex;gap:12px;font-size:12px;line-height:1.4;border-bottom:1px solid var(--line);border-radius:0}nav button small{color:var(--accent);min-width:19px}nav button.active{background:var(--bg);font-weight:bold;border-left:2px solid var(--accent)}.saved{border-top:1px solid var(--line);margin-top:28px;padding-top:10px}.saved h2{font-size:11px;letter-spacing:1px;text-transform:uppercase}.saved p{font-size:12px;color:var(--muted)}#bookmarks button{font-size:12px;display:block}.pdf{display:block;font-size:12px;margin:24px 0;color:var(--muted)}main{margin:80px 0 64px 290px;padding:28px 48px 24px}.readingbar{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;letter-spacing:1.6px;text-transform:uppercase;gap:16px;max-width:1300px;margin:0 auto 28px}:is(#reader,.page-turn-copy){max-width:1300px;margin:auto;display:grid;grid-template-columns:minmax(0,1fr);gap:24px;align-items:start}.page{background:var(--surface);padding:48px 9%;box-shadow:0 2px 15px #182b3006;min-width:0;position:relative}.page .folio{font:10px Arial,sans-serif;text-transform:uppercase;letter-spacing:2px;color:var(--muted);margin-bottom:30px}.page p{font:var(--size)/var(--leading) var(--font);margin:0 0 1em;overflow-wrap:anywhere}.page h2{font:32px/1.3 Georgia,serif;margin:18px 0 28px}.page.original{padding:0;background:white;min-height:0}.page.original img{display:block;width:100%;height:auto}.page img.front{display:block;max-height:65vh;max-width:100%;margin:0 auto 24px;box-shadow:0 15px 30px #0002}.page .start{display:block;margin:20px auto;background:var(--ink);color:var(--surface);padding:12px 28px}.page .imageNote{font:13px/1.5 Arial,sans-serif;color:var(--muted)}.endpage{max-width:1100px;margin:28px auto 0;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}footer{position:fixed;bottom:0;left:0;right:0;height:64px;background:var(--surface);border-top:1px solid var(--line);z-index:12;display:flex;align-items:center;padding:0 28px;gap:20px}footer input{flex:1;min-width:30px;accent-color:var(--accent)}#percent{font-size:11px;color:var(--muted)}#jump{font-size:12px;white-space:nowrap}dialog{color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:10px;width:min(520px,calc(100% - 24px));max-height:85dvh;padding:26px;box-shadow:0 24px 100px #0004}dialog::backdrop{background:#10222588;backdrop-filter:blur(3px)}.dialoghead{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}.dialoghead h2{font:25px Georgia,serif;margin:0}.dialoghead button{font-size:25px}dialog label{display:block;font-size:13px;margin:16px 0}dialog select,dialog input:not([type=range]){display:block;width:100%;padding:12px;margin:8px 0;border:1px solid var(--line);border-radius:5px;background:var(--bg);color:var(--ink)}dialog input[type=range]{display:block;width:100%;accent-color:var(--accent);margin-top:15px}.muted{font-size:12px;line-height:1.7;color:var(--muted)}#results button{display:block;text-align:left;border-bottom:1px solid var(--line);width:100%;font-size:13px;line-height:1.6}#results b{display:block;color:var(--accent)}#resultCount{font-size:12px;color:var(--muted)}.covers{display:flex;gap:12px}.covers img{width:calc(50% - 6px);object-fit:contain;align-self:start}#about p{font-size:14px;line-height:1.7}.sr,.skip:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.skip:focus{position:fixed;z-index:99;background:var(--surface);padding:20px}#toast{position:fixed;bottom:82px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--surface);font-size:13px;padding:12px 20px;border-radius:6px;z-index:40;display:none}body.hideNav #sidebar{display:none}body.hideNav main{margin-left:0}button:disabled{opacity:.3;cursor:default}:is(#reader,.page-turn-copy).spread{grid-template-columns:repeat(2,minmax(0,1fr))}:is(#reader,.page-turn-copy).spread .page{padding:36px 8%}:is(#reader,.page-turn-copy).spread .page.original{padding:0}:is(#reader,.page-turn-copy).scroll{max-width:800px}:is(#reader,.page-turn-copy):not(.spread):not(.scroll){max-width:800px}@media(min-width:1050px){#closeMenu{display:none}}@media(max-width:1049px){#sidebar{display:none;box-shadow:15px 0 50px #0003}body.navOpen #sidebar{display:block}main{margin-left:0;padding:24px 28px}.brand span{display:none}}@media(max-width:650px){header{height:64px;padding:0 10px;gap:2px}.brand{font-size:27px}.tools{gap:0}.tools button{padding:8px 10px;font-size:12px}#sidebar{top:64px;bottom:58px}main{margin-top:64px;padding:20px 12px 12px}.readingbar{font-size:9px;margin-bottom:16px;letter-spacing:1px}#edition{display:none}.page{padding:28px 20px;box-shadow:none}.page p{font-size:var(--size)}footer{height:58px;padding:0 8px;gap:5px}#percent{display:none}.endpage{font-size:10px}.page .folio{margin-bottom:22px}.page h2{font-size:28px}:is(#reader,.page-turn-copy).spread{grid-template-columns:1fr}dialog{padding:20px}}@media(max-height:500px) and (orientation:landscape){header{height:54px}main{margin-top:54px}.readingbar{margin-bottom:12px}#sidebar{top:54px}.page{padding-top:24px}footer{height:48px}.page img.front{max-height:95vh}}

.page{scroll-margin-top:100px}@media(max-width:650px){.page{scroll-margin-top:80px}}

/* A fixed reading surface: only the optional continuous reader scrolls. */
:root{--header:80px;--footer:64px}
html,body{width:100%;height:100%;overflow:hidden}
main,body.hideNav main{position:fixed;top:var(--header);bottom:var(--footer);left:290px;right:0;margin:0;display:flex;flex-direction:column;min-height:0;padding:18px 32px 8px;overflow:hidden}
body.hideNav main{left:0}
.readingbar{width:100%;flex:none;margin:0 auto 14px;min-height:12px}
:is(#reader,.page-turn-copy),:is(#reader,.page-turn-copy):not(.spread):not(.scroll){width:100%;min-height:0;flex:1;margin:0 auto;align-items:stretch;overflow:hidden;position:relative}
:is(#reader,.page-turn-copy).textSpread{max-width:1300px;grid-template-columns:minmax(0,1fr)}
:is(#reader,.page-turn-copy) .page,:is(#reader,.page-turn-copy).spread .page{height:100%;min-height:0;padding:24px 34px;overflow:hidden;display:flex;flex-direction:column}
:is(#reader,.page-turn-copy) .page .folio{flex:none;margin-bottom:14px;font-size:9px;line-height:1.4}
.flowClip{flex:1;min-height:0;overflow:hidden;width:100%}
.flow{height:100%;width:100%;column-count:1;column-gap:40px;column-fill:auto;overflow:visible}
.textSpread .flow{column-count:2}
.flow p{orphans:2;widows:2}
.flow h2{break-after:avoid;font-size:clamp(20px,3vw,32px);margin-top:0}
.flow strong{font-weight:700}.flow em{font-style:italic}
:is(#reader,.page-turn-copy) .imageNote{flex:none;align-self:flex-start;min-height:28px;padding:4px 0;margin-top:8px;font-size:11px}
:is(#reader,.page-turn-copy) .page.original,:is(#reader,.page-turn-copy).spread .page.original{padding:0;background:transparent}
:is(#reader,.page-turn-copy) .page.original img{height:100%;width:100%;min-height:0;object-fit:contain;object-position:center}
:is(#reader,.page-turn-copy) .page img.front{width:100%;height:0;min-height:0;flex:1;object-fit:contain;max-height:none;margin:0;box-shadow:none}
:is(#reader,.page-turn-copy) .page .start{flex:none;margin:12px auto 0}
.endpage{flex:none;width:100%;margin:4px auto 0;min-height:42px}
:is(#reader,.page-turn-copy).scroll{display:block;overflow-y:auto;overscroll-behavior:contain}
:is(#reader,.page-turn-copy).scroll .page{height:auto;min-height:200px;margin-bottom:24px;overflow:visible;display:block}
:is(#reader,.page-turn-copy).scroll .flowClip{overflow:visible}
:is(#reader,.page-turn-copy).scroll .flow{height:auto;columns:auto;transform:none!important}
:is(#reader,.page-turn-copy).scroll .page.original img{height:auto}
:is(#reader,.page-turn-copy).scroll .page img.front{height:auto;max-height:65dvh}
@media(max-width:1049px){main,body.hideNav main{left:0}}
@media(max-width:650px){:root{--header:64px;--footer:58px}main,body.hideNav main{padding:10px 10px 4px}:is(#reader,.page-turn-copy) .page,:is(#reader,.page-turn-copy).spread .page{padding:16px 18px}.readingbar{margin-bottom:8px}.endpage{min-height:36px}.endpage button{min-height:36px;padding:4px 8px}:is(#reader,.page-turn-copy) .page .folio{margin-bottom:8px}}
@media(max-height:500px) and (orientation:landscape){:root{--header:54px;--footer:48px}main,body.hideNav main{padding:6px 16px 2px}.readingbar{margin-bottom:5px;font-size:8px}:is(#reader,.page-turn-copy) .page,:is(#reader,.page-turn-copy).spread .page{padding:10px 20px}:is(#reader,.page-turn-copy) .page .folio{margin-bottom:6px}.endpage{min-height:30px}.endpage button{min-height:30px;padding:2px 8px}:is(#reader,.page-turn-copy) .imageNote{min-height:22px;margin-top:4px;padding:0}}
:is(#reader,.page-turn-copy).textSpread:not(.spread){max-width:1300px}

.page-turn-copy{background:var(--bg);pointer-events:none}
.turn-stage{position:fixed;z-index:20;pointer-events:none;perspective:1800px;perspective-origin:50% 50%;overflow:hidden}
.turn-joint{position:absolute;top:0;height:100%;transform-style:preserve-3d;will-change:transform}
.turn-face{position:absolute;inset:0;overflow:hidden;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--surface);outline:.35px solid transparent}
.turn-back{transform:rotateY(180deg)}
.turn-resting{position:absolute;top:0;height:100%;overflow:hidden}
.turn-shadow{position:absolute;inset:0;opacity:0;background:linear-gradient(90deg,transparent 10%,#0008 45%,#0005 60%,transparent 95%);transform-origin:center;filter:blur(12px)}
@media(prefers-reduced-motion:reduce){.turn-stage{display:none!important}}

/* A stable full-page surface inside an independently scrollable zoom viewport. */
#viewport{flex:1;min-height:0;width:100%;overflow:auto;overscroll-behavior:contain;position:relative;-webkit-overflow-scrolling:touch}
#sheet{position:relative;margin:0 auto}
#reader,#reader:not(.spread):not(.scroll),#reader.textSpread:not(.spread){max-width:none;flex:none;margin:0;position:relative;overflow:hidden}
#reader.scroll{overflow:visible;display:block}
#reader.scroll .page{margin-bottom:24px}
.zoomtools{display:flex;justify-content:center;align-items:center;gap:4px;margin:0 0 8px;flex:none;font-size:12px}
.zoomtools output{min-width:46px;text-align:center;font-variant-numeric:tabular-nums;color:var(--muted)}
.zoomtools button{min-height:36px;padding:6px 12px}
.zoomtools #zoomIn,.zoomtools #zoomOut{font-size:21px;line-height:1}
.zoomtools #fit{border:1px solid var(--line);margin-left:8px}
.zoomtools #scrollToggle[aria-pressed=true]{background:var(--line)}
.flow p{text-align:var(--align,left)}
#viewport:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.page-turn-copy{height:100%!important;transform:none!important}
body[data-theme=dark] .page.original img{box-shadow:0 0 0 1px #ffffff16}
footer{padding-bottom:env(safe-area-inset-bottom,0px);height:calc(var(--footer) + env(safe-area-inset-bottom,0px))}
main,body.hideNav main{bottom:calc(var(--footer) + env(safe-area-inset-bottom,0px))}
@media(max-width:650px){.zoomtools{margin-bottom:5px;gap:0}.zoomtools button{min-height:36px;padding:6px 10px}.zoomtools #fit{margin-left:3px}.readingbar{margin-bottom:3px}.brand{font-size:25px}}
@media(max-height:500px){.zoomtools{margin-bottom:2px}.zoomtools button{min-height:30px;padding:3px 10px}.readingbar{display:none}}

/* Mobile text pages scroll in full, without splitting one PDF page into screens. */
@media(max-width:850px){
 #reader:not(.scroll) .flowClip{overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;padding-right:4px}
 #reader:not(.scroll) .flow{height:auto;column-count:auto;column-width:auto;transform:none!important}
 #reader:not(.scroll) .flow p:last-child{margin-bottom:12px}
}

#viewport,#reader,.flowClip{overflow-anchor:none;scroll-behavior:auto}
.chapter-page{margin-left:auto;color:var(--muted);font-size:10px;white-space:nowrap}