/* Flipbook viewer — chrome + reading view base styles.
   Book-specific type styles live in book.css (generated). */
:root{
  --accent:#1f5f99;
  --ink:#1d2125;
  --ink-2:#5d646b;
  --ink-3:#8a9097;
  --line:#e2e0db;
  --chrome:#ffffff;
  --stage:#e9e7e2;
  --panel:#ffffff;
  --hover:rgba(29,33,37,.06);
  --bar-h:56px;
  --pager-h:56px;
  --radius:10px;
  --shadow-page:0 1px 2px rgba(0,0,0,.08),0 8px 28px rgba(0,0,0,.14);
  --f-ui:var(--f-body, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif);
  --u:1rem;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--chrome);color:var(--ink);font-family:var(--f-ui);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
body.mode-pages{background:var(--stage);overflow:hidden;height:100dvh}
button{font:inherit;color:inherit}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px;text-decoration:none}
.skip:focus{top:10px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ------------------------------------------------------------------ top bar */
.bar{position:sticky;top:0;z-index:30;height:var(--bar-h);display:flex;align-items:center;gap:8px;padding:0 10px 0 8px;background:var(--chrome);border-bottom:1px solid var(--line)}
.bar-title{flex:1;min-width:0;display:flex;align-items:baseline;gap:10px;padding-left:4px}
.bar-title .t{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:0 1 auto}
.bar-title .c{font-size:14px;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:0 1 auto;min-width:0}
.bar-title .c:not(:empty)::before{content:"";display:inline-block;width:1px;height:14px;background:var(--line);margin-right:10px;vertical-align:-2px}
.bar-actions{display:flex;align-items:center;gap:2px}
.ib{display:grid;place-items:center;width:40px;height:40px;padding:0;border:0;border-radius:8px;background:transparent;color:var(--ink);cursor:pointer;text-decoration:none;flex:none}
.ib:hover{background:var(--hover)}
.ib svg{width:20px;height:20px;display:block}
.ib[aria-pressed="true"]{background:var(--hover)}
.seg{display:inline-flex;align-items:center;background:#f1efeb;border-radius:9px;padding:3px;margin-right:6px}
.seg button{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:32px;padding:0 12px;border:0;border-radius:7px;background:transparent;color:var(--ink-2);font-size:13.5px;font-weight:500;cursor:pointer;white-space:nowrap}
.seg button svg{width:16px;height:16px;display:block;flex:none}
.seg button[aria-pressed="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.12)}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.progress span{display:block;height:100%;width:0;background:var(--accent);transition:width .25s ease}

/* ------------------------------------------------------------------ page mode */
.stage{position:relative;height:calc(100dvh - var(--bar-h) - var(--pager-h));overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none}
.zoom{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform}
.zoom.anim{transition:transform .28s cubic-bezier(.2,.7,.3,1)}
.book{position:relative;perspective:2600px;transition:transform .45s cubic-bezier(.2,.7,.3,1)}
.slot{position:absolute;top:0;height:100%}
.page{position:absolute;inset:0;background:#fff;overflow:hidden;box-shadow:var(--shadow-page)}
.page img{position:absolute;inset:0;width:100%;height:100%;display:block;-webkit-user-drag:none;user-select:none}
.page .lo{filter:none}
.book.spread .slot.left .page{border-radius:3px 0 0 3px}
.book.spread .slot.right .page{border-radius:0 3px 3px 0}
.book.spread .slot.left .page::after,.book.spread .slot.right .page::after{content:"";position:absolute;top:0;bottom:0;width:7%;pointer-events:none}
.book.spread .slot.left .page::after{right:0;background:linear-gradient(to left,rgba(0,0,0,.10),rgba(0,0,0,0))}
.book.spread .slot.right .page::after{left:0;background:linear-gradient(to right,rgba(0,0,0,.10),rgba(0,0,0,0))}
.single .page{border-radius:3px}
.links{position:absolute;inset:0;z-index:3;pointer-events:none}
.links a{position:absolute;display:block;border-radius:2px;transition:background .15s;pointer-events:auto}
.links a:hover,.links a:focus-visible{background:color-mix(in srgb,var(--accent) 16%,transparent)}
.hl{position:absolute;inset:0;pointer-events:none;z-index:1}
.hl i{position:absolute;background:rgba(255,213,0,.42);mix-blend-mode:multiply;border-radius:2px}
.turn-zone{position:absolute;top:0;bottom:0;width:9%;cursor:pointer;z-index:2}
.turn-zone.l{left:0}.turn-zone.r{right:0}
.turn-zone:hover{background:linear-gradient(var(--dir,to left),rgba(0,0,0,.07),rgba(0,0,0,0) 70%)}
.turn-zone.l{--dir:to right}
.leaf{position:absolute;top:0;height:100%;transform-style:preserve-3d;z-index:5;will-change:transform}
.leaf .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden;background:#fff}
.leaf .face img{width:100%;height:100%;display:block}
.leaf .back{transform:rotateY(180deg)}
.leaf .shade{position:absolute;inset:0;pointer-events:none;opacity:0}
.leaf .front .shade{background:linear-gradient(to left,rgba(0,0,0,.28),rgba(0,0,0,0) 60%)}
.leaf .back .shade{background:linear-gradient(to right,rgba(0,0,0,.22),rgba(0,0,0,0) 60%)}
.leaf.fwd .front .shade{background:linear-gradient(to right,rgba(0,0,0,.28),rgba(0,0,0,0) 60%)}
.leaf.fwd .back .shade{background:linear-gradient(to left,rgba(0,0,0,.22),rgba(0,0,0,0) 60%)}
.slider-track{position:absolute;top:0;left:0;height:100%;display:flex;will-change:transform}
.nav{position:absolute;top:50%;z-index:6;display:grid;place-items:center;width:44px;height:44px;margin-top:-22px;border:1px solid var(--line);border-radius:50%;background:rgba(255,255,255,.92);color:var(--ink);cursor:pointer;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.nav svg{width:20px;height:20px;display:block}
.nav:hover{background:#fff}
.nav:disabled{opacity:0;pointer-events:none}
.nav.prev{left:14px}.nav.next{right:14px}
.pager{height:var(--pager-h);display:flex;align-items:center;justify-content:center;gap:12px;padding:0 12px;background:var(--chrome);border-top:1px solid var(--line)}
.pager .num{font-size:14px;color:var(--ink-2);font-variant-numeric:tabular-nums;min-width:118px;text-align:center;background:none;border:0;cursor:pointer;height:36px;border-radius:8px;padding:0 10px}
.pager .num:hover{background:var(--hover)}
.pager input[type=range]{width:min(420px,40vw);accent-color:var(--accent);margin:0}
.pager .zoomctl{display:flex;align-items:center;gap:2px;margin-left:8px;padding-left:12px;border-left:1px solid var(--line)}
.pager .zoomctl output{font-size:13px;color:var(--ink-2);min-width:46px;text-align:center;font-variant-numeric:tabular-nums}

/* ------------------------------------------------------------------ drawers */
.scrim{position:fixed;inset:0;z-index:40;background:rgba(20,22,24,.32);opacity:0;transition:opacity .2s}
.scrim.on{opacity:1}
.drawer{position:fixed;top:0;bottom:0;z-index:41;width:min(380px,92vw);background:var(--panel);display:flex;flex-direction:column;box-shadow:0 10px 40px rgba(0,0,0,.18);transition:transform .25s cubic-bezier(.2,.7,.3,1)}
.drawer.left{left:0;transform:translateX(-102%)}
.drawer.right{right:0;transform:translateX(102%)}
.drawer.open{transform:none}
.dh{display:flex;align-items:center;gap:8px;height:var(--bar-h);padding:0 8px 0 16px;border-bottom:1px solid var(--line);flex:none}
/* contents as a side panel beside the page (wide screens, flipbooks built to open with it) */
body.toc-pinned .drawer.left{top:var(--bar-h);width:320px;z-index:20;box-shadow:none;border-right:1px solid var(--line);transition:none}
body.toc-pinned .drawer.left .dh{height:48px}
body.toc-pinned main{margin-left:320px}
main{transition:none!important}   /* the page is measured right after the panel opens or closes */
.dh h2{flex:1;margin:0;font-size:15px;font-weight:600}
.tabs{display:flex;gap:4px;padding:10px 12px 0;border-bottom:1px solid var(--line);flex:none}
.tabs button{border:0;background:none;padding:8px 10px 10px;font-size:14px;color:var(--ink-2);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--accent);font-weight:600}
.dbody{flex:1;overflow:auto;overscroll-behavior:contain}
.chapters{list-style:none;margin:0;padding:6px 0}
.chapters a{display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:12px;padding:8px 16px;color:var(--ink);text-decoration:none;font-size:14.5px;line-height:1.35;border-left:3px solid transparent}
.chapters a:hover{background:var(--hover)}
.chapters a[aria-current="true"]{border-left-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,#fff);font-weight:600}
.chapters img{width:34px;height:auto;display:block;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.chapters .pg{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:14px 12px;padding:16px}
.thumbs a{display:flex;flex-direction:column;align-items:center;gap:6px;text-decoration:none;color:var(--ink-2);font-size:12.5px;font-variant-numeric:tabular-nums}
.thumbs img{width:100%;height:auto;display:block;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.1),0 2px 6px rgba(0,0,0,.08);background:#f4f3f0}
.thumbs a[aria-current="true"] img{box-shadow:0 0 0 2px var(--accent)}
.thumbs a[aria-current="true"]{color:var(--ink);font-weight:600}
.dfoot{flex:none;border-top:1px solid var(--line);padding:10px 12px calc(10px + env(safe-area-inset-bottom))}
.dl{display:flex;align-items:center;justify-content:center;gap:8px;height:42px;border:1px solid var(--line);border-radius:9px;color:var(--ink);text-decoration:none;font-size:14px;font-weight:500}
.dl:hover{background:var(--hover)}
.dl svg{width:18px;height:18px;display:block;flex:none}
.sform{padding:12px 12px 8px;flex:none}
.sbox{display:flex;align-items:center;gap:8px;height:42px;border:1px solid var(--line);border-radius:9px;padding:0 10px;background:#fff}
.sbox:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}
.sbox svg{width:18px;height:18px;color:var(--ink-3);flex:none;display:block}
.sbox input{flex:1;min-width:0;border:0;outline:0;font:inherit;font-size:15px;background:transparent;color:var(--ink)}
.smeta{padding:0 16px 8px;font-size:12.5px;color:var(--ink-3)}
.results{list-style:none;margin:0;padding:0 0 16px}
.results a{display:block;padding:10px 16px;text-decoration:none;color:var(--ink);border-top:1px solid #f0eeea}
.results a:hover,.results a:focus-visible{background:var(--hover)}
.results .rh{display:flex;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--ink-3);margin-bottom:2px}
.results .rh b{color:var(--ink-2);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.results .rs{font-size:14px;line-height:1.45}
.results mark,.rf mark.hit{background:rgba(255,213,0,.5);color:inherit;border-radius:2px;padding:0 1px}

/* ------------------------------------------------------------------ lightbox */
.lightbox{position:fixed;inset:0;z-index:60;background:#1b1c1e;display:flex;flex-direction:column}
.lightbox .lb-bar{height:52px;display:flex;align-items:center;gap:8px;padding:0 8px 0 16px;color:#fff;flex:none}
.lightbox .lb-bar span{flex:1;font-size:14px;opacity:.85}
.lightbox .ib{color:#fff}
.lightbox .ib:hover{background:rgba(255,255,255,.12)}
.lightbox .lb-btn{height:36px;padding:0 12px;border-radius:8px;border:1px solid rgba(255,255,255,.25);background:transparent;color:#fff;font-size:13.5px;cursor:pointer}
.lightbox .lb-stage{position:relative;flex:1;overflow:hidden;touch-action:none}
.lightbox .page{box-shadow:none}

.toast{position:fixed;left:50%;bottom:calc(var(--pager-h) + 16px);transform:translate(-50%,20px);z-index:70;background:var(--ink);color:#fff;font-size:14px;padding:10px 16px;border-radius:9px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ------------------------------------------------------------------ reading view */
.rf{--u:1rem;max-width:46rem;margin:0 auto;padding:8px 20px 96px;line-height:1.55;overflow-wrap:break-word}
.rf .pg{position:relative;padding:28px 0 36px;border-bottom:1px solid var(--line);scroll-margin-top:calc(var(--bar-h) + 8px)}
.rf .pg:last-child{border-bottom:0}
.rf .pg[style*="--pg-bg"]{background:var(--pg-bg);margin:0 -20px;padding:28px 20px 36px;border-bottom:0}
.pg-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 14px;min-height:32px}
.pg-no{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);font-weight:600}
.pg.dark .pg-no{color:rgba(255,255,255,.7)}
.pg-view{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 10px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink-2);font-size:13px;cursor:pointer}
.pg-view:hover{color:var(--ink);border-color:#cfccc6}
.rf p,.rf .li>div{margin:0 0 .75em}
.rf .h{line-height:1.22;margin:1.15em 0 .45em;text-wrap:balance;scroll-margin-top:calc(var(--bar-h) + 12px)}
.rf .pg-head + .h,.rf .bx > .h:first-child,.rf .bx > :first-child{margin-top:0}
.rf h2.h{margin-top:.2em}
.rf .nw{white-space:nowrap}
.rf a{color:inherit;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}
.rf a:hover{text-decoration-thickness:2px}
.rf .ls{list-style:none;margin:0 0 .9em;padding:0}
.rf .ls li{display:grid;grid-template-columns:1.25em 1fr;column-gap:.35em;align-items:baseline}
.rf .ls.ol li{grid-template-columns:auto 1fr;column-gap:.55em}
.rf .ls .mk{font-weight:700;text-align:left;line-height:1}
.rf .ls:not(.ol) .mk{font-size:.8em;transform:translateY(-.05em)}
.rf .ls .li > div{margin:0 0 .4em}
.rf .ls .li > p{margin:0 0 .5em}
.rf .toc{list-style:none;margin:.3em 0 1.2em;padding:0}
.rf .toc li{margin:0}
.rf .toc .te{display:flex;align-items:flex-end;gap:.45em;padding:.4em 0;color:inherit;text-decoration:none}
.rf .toc .tt{flex:0 1 auto;min-width:0}
.rf .toc .ld{flex:1 1 1.5em;min-width:1.5em;margin-bottom:.5em;border-bottom:2px dotted currentColor;opacity:.35}
.rf .toc .tp{flex:none;min-width:1.2em;text-align:right;font-variant-numeric:tabular-nums}
.rf .toc .te.nf{display:grid;grid-template-columns:2.2em 1fr;align-items:baseline;gap:0}
.rf .toc .te.nf .tp{text-align:left;min-width:0}
.rf .toc .l2 .te{padding-left:1.1em}
.rf .toc .l1:not(:first-child){margin-top:.25em}
.rf .toc a.te:hover .tt,.rf .toc a.te:focus-visible .tt{text-decoration:underline;text-underline-offset:2px}
.rf .badge{display:grid;place-items:center;min-width:2.25em;height:2.25em;padding:0 .45em;margin:0 0 .65em;border-radius:7px;background:var(--bd);line-height:1;width:max-content}
.rf .badge.round{border-radius:999px;width:2.25em;padding:0}
.rf .badge > span{display:block;line-height:1;font-size:1em!important}
.rf .bx{background:var(--bx-bg);border:1px solid var(--bx-bd,transparent);border-radius:8px;padding:18px 18px 8px;margin:1.1em 0}
.rf .bx.flat{background:transparent;border:0;padding:0}
.rf .bx .bx{margin:.8em 0}
.rf .bx .ic{display:block;margin:0 0 10px}
.rf .fg{margin:1em 0;border-radius:8px;overflow:hidden;background:#f2f1ee}
.rf .fg img{display:block;width:100%;height:auto;max-height:340px;object-fit:cover}
.rf .bx .fg{margin:.6em 0 1em;background:transparent}
.rf .bx .fg img{max-height:220px;object-fit:contain}
.rf .pg-img{margin:0}
.rf .pg-img img{display:block;width:100%;height:auto;border-radius:4px;box-shadow:0 0 0 1px rgba(0,0,0,.06)}
.rf .tw{margin:1em 0 1.2em;overflow-x:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;border-radius:6px}
.rf .tb{border-collapse:collapse;width:100%;font-size:inherit}
.rf .tb th,.rf .tb td{border:2px solid var(--sep,#fff);padding:.55em .65em;vertical-align:middle;text-align:left}
.rf .tb th > :last-child,.rf .tb td > :last-child{margin-bottom:0}
.rf .tb p{margin:0 0 .3em}
.rf .tb .ci{display:flex;justify-content:center;align-items:center}
.rf .tb .ci .ic{margin:0}
.rf .tw.wide .tb{min-width:calc(var(--cols) * 7.25rem)}
.rf .tw.ondark .tb th,.rf .tw.ondark .tb td{border-width:1px}
.rf .tcards{display:flex;flex-wrap:wrap;gap:14px;margin:1em 0 1.2em}
.rf .tcards .tw{flex:1 1 15rem;margin:0}
.rf .tw.wide .tb td:first-child,.rf .tw.wide .tb th:first-child{position:sticky;left:0;z-index:1;background-clip:padding-box}
.rf .tw.wide .tb td:first-child:not([style*="background"]){background:var(--sep,#fff)}
.rf .tw.scrolls{box-shadow:inset -14px 0 12px -12px rgba(0,0,0,.25)}
.rf .tw.scrolls.end{box-shadow:none}
.rf .hint{display:none;font-size:12px;color:var(--ink-3);margin:-.6em 0 1em}
.rf .tw.scrolls + .hint{display:block}

@media (min-width:900px){
  .rf{--u:1.0625rem;padding:12px 32px 120px}
  .rf .pg[style*="--pg-bg"]{margin:0 -32px;padding:32px 32px 40px;border-radius:12px}
}
@media (max-width:760px){
  :root{--bar-h:52px;--pager-h:52px}
  .bar{padding:0 4px}
  .bar-title .c{display:none}
  .bar-title .t{font-size:14.5px}
  .seg button span{display:none}
  .seg button{padding:0 9px}
  .hide-sm{display:none!important}
  .pager input[type=range]{display:none}
  .pager .zoomctl{display:none}
  .nav{display:none}
  .drawer{width:100vw}
  .rf .pg[style*="--pg-bg"]{border-radius:0}
}
@media (max-height:520px) and (orientation:landscape){
  :root{--bar-h:44px;--pager-h:44px}
  .bar-title .c{display:none}
  .seg button{height:28px}
  .pager input[type=range],.pager .zoomctl{display:none}
  .nav{width:36px;height:36px;margin-top:-18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
}
@media print{
  .bar,.pager,.stage,.drawer,.scrim,.pg-view,.toast{display:none!important}
  body.mode-pages{overflow:visible;height:auto;background:#fff}
  .rf{display:block!important;max-width:none}
  .rf .pg{break-inside:avoid-page}
}