/* Photon Books reader v2 (approved design, 2026-10-17). Loaded AFTER reader.css, which stays byte-identical:
   every visual change is an override here. Night theme = html.night (set before first paint by a head script).
   Chrome only ever moves with transform/opacity: the stage and #bookWrap never resize, so the flip engine is never re-measured. */
@font-face{font-family:"Inter";src:url("/ebook/fonts/Inter-VF.woff2") format("woff2");font-weight:400 700;font-display:swap}
@font-face{font-family:"Fraunces";src:url("/ebook/fonts/Fraunces-VF.woff2") format("woff2");font-weight:400 700;font-display:swap}

:root{
  --navy-950:#0A1222;--navy-900:#0E1A31;--navy-800:#12294B;--navy-700:#1B3A66;--navy-600:#2A4F82;
  --gold-500:#F0A500;--gold-400:#F6C14B;--gold-700:#8A6512;
  --claret-600:#7A2232;--claret-500:#9A3346;
  --paper:#FFFFFF;--linen:#E9E7E2;--sand:#F6F3EC;
  --font-ui:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-display:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:var(--font-ui);--serif:var(--font-display);
  --hdr:52px;--bar:60px;--r-sm:8px;--r-md:10px;--r-lg:14px;--r-xl:18px;
  --ease:cubic-bezier(.22,.61,.36,1);--t-chrome:220ms;
  --stage:var(--linen);
  --chrome:rgba(250,249,246,.96);--chrome-solid:#FAF9F6;--chrome-line:rgba(18,41,75,.10);
  --surface:#FFFFFF;--surface-2:#F6F4EF;--surface-3:#EEEAE2;
  --text:#12294B;--text-2:#46516A;--text-3:#646E84;
  --hover:rgba(18,41,75,.06);--press:rgba(18,41,75,.11);--focus:#2A4F82;
  --primary:#12294B;--on-primary:#FFFFFF;
  --track:rgba(18,41,75,.13);--fill:var(--gold-500);--thumb-ring:#12294B;
  --mark:var(--claret-600);--num:var(--claret-600);--here:var(--gold-500);--here-bg:rgba(240,165,0,.10);
  --scrim:rgba(14,26,49,.28);--ok:#1D7A5A;
  --page-dim:none;
  --page-filter:none;
  --page-shadow:0 1px 2px rgba(16,24,40,.08),0 12px 28px -8px rgba(16,24,40,.22),0 34px 70px -24px rgba(16,24,40,.30);
  --pop-shadow:0 2px 6px rgba(16,24,40,.08),0 18px 44px -10px rgba(16,24,40,.28);
}
html.night{
  --stage:var(--navy-950);
  --chrome:rgba(16,30,56,.96);--chrome-solid:#101E38;--chrome-line:rgba(241,235,221,.10);
  --surface:#13223F;--surface-2:#182A4B;--surface-3:#203559;
  --text:#F1EBDD;--text-2:#C6CDDB;--text-3:#97A3B9;
  --hover:rgba(241,235,221,.07);--press:rgba(241,235,221,.13);--focus:var(--gold-400);
  --primary:var(--gold-500);--on-primary:#0E1A31;
  --track:rgba(241,235,221,.16);--thumb-ring:var(--gold-500);
  --mark:#E07A8B;--num:var(--gold-400);--here-bg:rgba(240,165,0,.12);
  --scrim:rgba(3,8,18,.55);--ok:#6FD1A6;
  --page-dim:rgba(8,14,28,.18);
  --page-filter:brightness(.82) contrast(.97) sepia(.05);
  --page-shadow:0 2px 4px rgba(0,0,0,.35),0 24px 60px -12px rgba(0,0,0,.65);
  --pop-shadow:0 2px 6px rgba(0,0,0,.3),0 22px 50px -10px rgba(0,0,0,.6);
}

/* ---------- base ---------- */
body{font-family:var(--font-ui);font-size:14px;line-height:1.45;color:var(--text);background:var(--stage);transition:background-color .3s var(--ease)}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:var(--r-sm)}
svg.i{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;flex:none}
.eyebrow{font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--text-3)}
.ib{position:relative;width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-md);color:var(--text-2);flex:none;background:none;transition:none}
.ib::before{content:"";position:absolute;inset:4px;border-radius:var(--r-md);transition:background .15s}
.ib:hover{background:none;color:var(--text)}
.ib:hover::before{background:var(--hover)}.ib:active::before{background:var(--press)}
.ib[aria-pressed=true]{color:var(--mark)}.ib[aria-pressed=true] svg.i{fill:currentColor}
.ib[aria-expanded=true]::before{background:var(--press)}
.ib[disabled]{opacity:.35;pointer-events:none}
.textbtn{height:44px;display:inline-flex;align-items:center;gap:4px;padding:0 10px 0 6px;border-radius:var(--r-md);color:var(--text-2);font-weight:500;font-size:14px;text-decoration:none}
.textbtn:hover{background:var(--hover);color:var(--text)}
.desk{}
.phone-only{display:none!important}
.btn2,.dl-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:34px;padding:0 12px;border-radius:var(--r-md);font-weight:600;font-size:13px;background:var(--primary);color:var(--on-primary);text-decoration:none;white-space:nowrap}

/* ---------- top bar ---------- */
.hdr{height:calc(var(--hdr) + env(safe-area-inset-top));padding:env(safe-area-inset-top) max(8px,env(safe-area-inset-right)) 0 max(8px,env(safe-area-inset-left));
  background:var(--chrome);border-bottom:1px solid var(--chrome-line);color:var(--text);
  display:grid;grid-template-columns:1fr minmax(0,auto) 1fr;align-items:center;gap:12px;
  transition:transform var(--t-chrome) var(--ease),opacity var(--t-chrome) var(--ease),background-color .3s}
.hdr .vols{display:none!important}
.hdr__l,.hdr__r{display:flex;align-items:center;gap:0;min-width:0}
.hdr__r{justify-content:flex-end}
.tb-sep{width:1px;height:20px;background:var(--chrome-line);margin:0 6px}
.owl{width:26px;height:26px;border-radius:50%;flex:none}
.hdr__c{min-width:0;text-align:center;max-width:min(680px,52vw)}
#bookTitle{font-family:var(--font-ui);font-size:13.5px;font-weight:600;line-height:1.3;color:var(--text);letter-spacing:-.003em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-wrap:balance}
.hdr .crumb{display:none;background:none;border:0;height:auto;max-width:none;width:100%;padding:2px 4px;border-radius:8px;flex:none;font-size:inherit;color:inherit;text-align:center;overflow:hidden}
.hdr .crumb:hover{background:var(--hover)}
.crumb .eyebrow{display:block;font-size:10px;letter-spacing:.1em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crumb b{display:block;font-size:13.5px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:none}
body.chrome-hidden .hdr{transform:translateY(-100%);opacity:0}
body.chrome-hidden .bar{transform:translateY(100%);opacity:0}
body.chrome-hidden .sbar{transform:translateY(calc(-100% - var(--hdr) - env(safe-area-inset-top)));opacity:0}
body.chrome-hidden .edge{opacity:0;pointer-events:none}
.hdr .navbtn{width:44px;padding:0;gap:0;background:none;border:0;display:grid}
body.nav-open .navbtn{background:none;color:var(--text)}
.lib-label{font-size:14px}

/* download ring (downloads.js) */
.dlbtn[hidden]{display:none}
.dlbtn .ring{position:absolute;left:7px;top:7px;width:30px;height:30px;transform:rotate(-90deg);pointer-events:none;display:none}
.dlbtn.busy .ring{display:block}
.dlbtn .ring circle{fill:none;stroke-width:2.2}
.dlbtn .ring .bg{stroke:var(--track)}.dlbtn .ring .fg{stroke:var(--gold-500);stroke-linecap:round;transition:stroke-dashoffset .3s}
.dlbtn.busy svg.i{width:15px;height:15px}
.dlbtn.done{color:var(--ok)}
#btnMore.badge::after{content:"";position:absolute;top:10px;right:10px;width:8px;height:8px;border-radius:50%;background:var(--gold-500);box-shadow:0 0 0 2px var(--chrome-solid)}

/* ---------- bottom bar ---------- */
.bar{left:0;right:0;bottom:0;height:calc(var(--bar) + env(safe-area-inset-bottom));padding:0 max(18px,env(safe-area-inset-right)) env(safe-area-inset-bottom) max(18px,env(safe-area-inset-left));
  background:var(--chrome);border-top:1px solid var(--chrome-line);color:var(--text);
  display:grid;grid-template-columns:minmax(200px,300px) 1fr minmax(170px,auto);align-items:center;gap:28px;justify-content:normal;flex-direction:row;
  transition:transform var(--t-chrome) var(--ease),opacity var(--t-chrome) var(--ease),background-color .3s}
.crumb--bar{display:flex;flex-direction:column;align-items:flex-start;gap:0;min-width:0;max-width:100%;width:auto;height:auto;margin:0 0 0 -10px;padding:6px 10px;border:0;border-radius:var(--r-md);background:none;text-align:left;font-size:inherit;color:inherit;justify-content:center}
.crumb--bar:hover{background:var(--hover)}
.crumb--bar .eyebrow{font-size:10.5px;max-width:100%}
.crumb--bar b{max-width:100%;font-size:13.5px}
.crumb--bar .chp{display:none}
.pagebox{display:flex;flex-direction:column;align-items:flex-end;gap:1px;white-space:nowrap;min-width:0}
.jump{margin:0;gap:6px;font-size:13.5px;color:var(--text-2);font-variant-numeric:tabular-nums;display:flex;align-items:center}
.jump input{width:52px;height:30px;border-radius:var(--r-sm);border:1px solid var(--chrome-line);background:var(--surface);text-align:center;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums}
.jump input:focus{outline:2px solid var(--focus);outline-offset:0;border-color:transparent}
.pagebox small{font-size:12px;color:var(--text-3)}
.scrub{height:32px;border-radius:0;display:block}
.scrub__segs{left:0;right:0;top:50%;bottom:auto;height:4px;margin-top:-2px;border-radius:0;overflow:visible;background:none;transition:height .15s,margin .15s}
.scrub:hover .scrub__segs,.scrub.drag .scrub__segs{height:6px;margin-top:-3px}
.scrub .seg,.scrub .seg:nth-child(even),.scrub .seg.fm,.scrub .seg.on{display:block;border:0;border-right:2px solid transparent;background:var(--track);background-clip:padding-box;border-radius:2px;overflow:hidden}
.scrub .seg::before{content:"";position:absolute;inset:0 auto 0 0;width:var(--fill,0%);background:var(--fill-c,var(--gold-500));border-radius:2px}
.scrub .seg span{display:none}
.scrub__thumb{top:50%;bottom:auto;width:16px;height:16px;margin:-8px 0 0 -8px;border-radius:50%;background:var(--surface);box-shadow:0 0 0 2px var(--thumb-ring),0 2px 6px rgba(0,0,0,.25);transition:left .25s var(--ease)}
.scrub__ghost{top:50%;bottom:auto;width:2px;height:14px;margin:-7px 0 0 -1px;border-radius:1px;background:var(--text-3);opacity:.6;box-shadow:none}
.scrub.drag .scrub__thumb{opacity:1}
.scrub__tip{bottom:calc(100% + 4px);background:var(--surface);color:var(--text);box-shadow:var(--pop-shadow);border:1px solid var(--chrome-line);border-radius:var(--r-md);padding:8px 12px;font-size:13px;font-weight:400;max-width:min(560px,92vw)}
.scrub__tip b{font-weight:600}.scrub__tip span{color:var(--text-3);margin-left:8px}
.scrub:focus-visible{outline-offset:2px}

/* ---------- stage and pages: quiet stage, one lifted sheet ---------- */
.stage{inset:0;padding:calc(var(--hdr) + 14px + env(safe-area-inset-top)) 80px calc(var(--bar) + 18px + env(safe-area-inset-bottom));background:none;transition:none}
body.is-sample .stage,body.is-preview .stage{top:0;padding-top:calc(var(--hdr) + 14px + var(--sbar) + env(safe-area-inset-top))}
#book{filter:none}
.pg{background:#fff;box-shadow:var(--page-shadow)}
.pg::after{background:var(--page-dim)}
.pg.left::before,.pg.right::before{width:5%}
.pg.left::before{background:linear-gradient(90deg,rgba(0,0,0,0),rgba(0,0,0,.075))}
.pg.right::before{background:linear-gradient(270deg,rgba(0,0,0,0),rgba(0,0,0,.075))}
.ribbon{position:absolute;top:0;right:22px;width:18px;height:30px;background:var(--claret-600);z-index:4;clip-path:polygon(0 0,100% 0,100% 100%,50% 76%,0 100%);transform-origin:top;animation:rib-drop .25s var(--ease);pointer-events:none}
@keyframes rib-drop{from{transform:scaleY(.2)}to{transform:none}}
.loading{color:var(--text-2);font-family:var(--font-display);font-weight:600}
.gate{background:var(--surface);color:var(--text);box-shadow:var(--pop-shadow)}
.gate h1{color:var(--text)}.gate p{color:var(--text-2)}.gate .fine{color:var(--text-3)}
.gate a{color:var(--claret-600)}html.night .gate a{color:var(--gold-400)}
.btn{background:var(--claret-600)}
.err{color:var(--claret-600)}

.edge{position:fixed;top:50%;z-index:30;width:44px;height:44px;margin-top:-22px;border-radius:50%;background:var(--chrome);color:var(--text-2);box-shadow:0 0 0 1px var(--chrome-line),0 4px 14px rgba(16,24,40,.10);transition:opacity var(--t-chrome),color .15s}
.edge::before{display:none}
.edge.prev{left:20px}.edge.next{right:20px}
.edge:hover{color:var(--text);background:var(--chrome)}
.edge[disabled]{opacity:.3}

/* ---------- popovers and menus ---------- */
.pop{position:fixed;z-index:62;background:var(--surface);color:var(--text);border-radius:var(--r-lg);box-shadow:var(--pop-shadow);border:1px solid var(--chrome-line);min-width:280px;max-width:calc(100vw - 16px);padding:8px;transform-origin:top right;animation:pop-in .16s var(--ease)}
.pop[hidden]{display:none}
@keyframes pop-in{from{opacity:0;transform:scale(.97) translateY(-4px)}to{opacity:1;transform:none}}
.pop h3{font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--text-3);padding:10px 10px 6px}
.menu-it{display:flex;align-items:center;gap:12px;width:100%;min-height:44px;padding:0 12px;border-radius:var(--r-md);font-size:14px;text-align:left;color:var(--text);text-decoration:none;cursor:pointer}
.menu-it:hover{background:var(--hover)}
.menu-it svg.i{color:var(--text-2)}
.menu-it small{margin-left:auto;font-size:12.5px;color:var(--text-3);padding-left:12px}
.menu-it.static{cursor:default;color:var(--text-3);font-size:13px}.menu-it.static:hover{background:none}
.menu-it[hidden]{display:none}
.pop hr{border:0;border-top:1px solid var(--chrome-line);margin:6px 4px}
.segctl{display:flex;background:var(--surface-3);border-radius:var(--r-md);padding:3px;margin:0 6px 6px}
.segctl button{flex:1;min-height:38px;display:flex;align-items:center;justify-content:center;gap:6px;border-radius:8px;font-size:13.5px;font-weight:500;color:var(--text-2)}
.segctl button[aria-pressed=true]{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(16,24,40,.12),0 0 0 1px var(--chrome-line)}
html.night .segctl button[aria-pressed=true]{background:var(--navy-600)}
.segctl svg.i{width:16px;height:16px}
.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:52px;padding:0 12px;font-size:14px}
.toggle-row small{display:block;font-size:12px;color:var(--text-3)}
.switch{position:relative;width:44px;height:26px;border-radius:13px;background:var(--track);flex:none;transition:background .15s}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--surface);box-shadow:0 1px 2px rgba(0,0,0,.2);transition:left .15s}
.switch[aria-checked=true]{background:var(--primary)}
.switch[aria-checked=true]::after{left:21px;background:var(--on-primary)}
.keys{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;padding:6px 12px 10px;font-size:13.5px}
.keys dt{white-space:nowrap}.keys dd{color:var(--text-2)}
.keys kbd,.nav kbd{font:600 11px var(--font-ui);color:var(--text-3);border:1px solid var(--chrome-line);border-bottom-width:2px;border-radius:5px;padding:1px 6px;background:var(--surface-2)}

/* ---------- contents drawer ---------- */
.scrim{inset:0;background:var(--scrim)}
.nav{top:0;bottom:0;left:0;width:min(440px,100vw);background:var(--surface);color:var(--text);border-radius:0 var(--r-xl) var(--r-xl) 0;box-shadow:24px 0 60px -20px rgba(10,18,34,.45);padding-top:0;z-index:60}
body.is-sample .nav,body.is-preview .nav{top:0}
.nav__head{display:flex;gap:14px;align-items:flex-start;padding:calc(16px + env(safe-area-inset-top)) 10px 12px 20px}
.nav__cover{width:46px;height:60px;border-radius:2px;box-shadow:0 2px 6px rgba(0,0,0,.25);flex:none;object-fit:cover}
.nav__cover[hidden]{display:none}
.nav__ht{flex:1;min-width:0;padding-top:2px}
.nav__ht h2{font-family:var(--font-display);font-weight:600;font-size:17px;line-height:1.25;color:var(--text);margin-top:3px}
.nav .nav__x{width:44px;height:44px;border-radius:var(--r-md);background:none;color:var(--text-2);flex:none}
.nav__top{display:flex;flex-direction:column;gap:10px;padding:4px 16px 12px 20px;border-bottom:0;flex-wrap:nowrap}
.nav__search{order:2;height:42px;padding:0 12px;border:0;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--chrome-line);color:var(--text-3);width:100%;flex:none}
.nav__search:focus-within{box-shadow:inset 0 0 0 2px var(--focus)}
.nav__search input{font-size:14.5px;color:var(--text)}
.nav__search input::placeholder{color:var(--text-3)}
.nav__vols{order:1;width:100%;display:flex;background:var(--surface-3);border-radius:var(--r-md);padding:3px}
.nav__vols button{flex:1;flex-direction:row;justify-content:center;gap:6px;min-height:38px;padding:5px 8px;border-radius:8px;font-size:13.5px;font-weight:500;color:var(--text-2);align-items:center;line-height:1.2}
.nav__vols button small{font-size:13.5px;font-weight:500;color:var(--text-3)}
.nav__vols button small::before{content:"· "}
.nav__vols button[aria-pressed=true]{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(16,24,40,.12),0 0 0 1px var(--chrome-line)}
.nav__vols button[aria-pressed=true] small{color:var(--text-3)}
html.night .nav__vols button[aria-pressed=true]{background:var(--navy-600)}
.nav__tabs{display:flex;gap:2px;border-bottom:1px solid var(--chrome-line);padding:0 16px 0 10px;flex:none}
.nav__tabs button{position:relative;height:42px;padding:0 10px;font-size:14px;font-weight:500;color:var(--text-3)}
.nav__tabs button[aria-selected=true]{color:var(--text);font-weight:600}
.nav__tabs button[aria-selected=true]::after{content:"";position:absolute;left:10px;right:10px;bottom:-1px;height:2px;border-radius:2px;background:var(--gold-500)}
.nav__tabs .count{font-size:12px;color:var(--text-3);margin-left:4px;font-weight:500}
.nav__recent{padding:8px 10px 6px 20px;border-bottom:0;gap:6px;overflow-x:auto;scrollbar-width:none}
.nav__recent::-webkit-scrollbar{display:none}
.nav__recent .rl{font-size:10.5px;font-weight:600;letter-spacing:.12em;color:var(--text-3)}
.nav__recent .rc{flex:none;max-width:250px;padding:5px 10px;border-radius:100px;background:var(--surface-2);border:0;box-shadow:inset 0 0 0 1px var(--chrome-line);color:var(--text-2);font-size:12.5px}
.nav__recent .rc:hover{box-shadow:inset 0 0 0 1px var(--claret-600)}
.nav__recent .rc b{color:var(--num);font-weight:600}
/* the phone layout (chapter grid, then the open chapter) at every width */
.nav__body{display:block;overflow-y:auto;padding-bottom:16px;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;flex:1;min-height:0}
.nav .nav__chs{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;padding:10px 12px 10px 16px;border-right:0;border-bottom:1px solid var(--chrome-line);overflow:visible;background:none}
.nav .chb{grid-template-columns:1fr;grid-template-rows:auto auto;justify-items:start;gap:1px;padding:6px 7px 7px;min-height:54px;background:var(--surface-2);border:1px solid var(--chrome-line);border-radius:var(--r-md);color:var(--text)}
.nav .chb b{text-align:left;font-family:var(--font-display);font-size:17px;font-weight:600;line-height:1;color:var(--num)}
.nav .chb span{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:11px;line-height:1.2;font-weight:600;color:var(--text);overflow:hidden}
.nav .chb em{display:none}
.nav .chb.sm{min-height:54px;padding:6px 7px}.nav .chb.sm span{font-size:11.5px;font-weight:500;color:var(--text-2)}
.nav .chb:hover{background:var(--hover)}
.nav .chb[aria-pressed=true]{background:var(--here-bg);border-color:var(--gold-500)}
.nav .chb[aria-pressed=true] span{color:var(--text)}.nav .chb[aria-pressed=true] b{color:var(--num)}
.nav .chb.here::before{left:auto;right:6px;top:8px;margin:0;background:var(--gold-500);box-shadow:none}
.nav .chb.cv{display:none}
.nav .chb.lock{opacity:.7}
.fb-h{grid-column:1 / -1;color:var(--text-3)}.fb-h small{color:var(--text-3)}
.nav__detail{overflow:visible;padding:12px 16px 8px 20px}
.dt__t small{color:var(--text-3);letter-spacing:.12em}
.dt__t h3{font-family:var(--font-display);font-weight:600;font-size:22px;line-height:1.15;color:var(--text)}
.dt__go{padding:9px 14px;border-radius:var(--r-md);background:var(--primary);color:var(--on-primary)!important}
.dt__go:hover{background:var(--primary);filter:brightness(1.12)}
.dt__msg{color:var(--text-2)}.dt__msg a{color:var(--claret-600)}
.gh{color:var(--text-3);font-weight:600;letter-spacing:.12em}.gh small{color:var(--num)}
.gh--go:hover,.gh--go.on{background:var(--hover);color:var(--text)}
.nav .grid{grid-template-columns:1fr;gap:2px}
.nav .it{min-height:42px;padding:8px 10px;border:0;border-radius:8px;background:none;font-size:14px;color:var(--text-2)}
.nav .it b{color:var(--num);font-weight:600}
.nav .it span{color:var(--text-2)}
.nav .it em{color:var(--text-3)}
.nav .it:hover{background:var(--hover)}.nav .it:hover span{color:var(--text)}
.nav .it.on{position:relative;background:var(--here-bg);border:0}
.nav .it.on::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;background:var(--here)}
.nav .it.on span{color:var(--text);font-weight:500}.nav .it.on b{color:var(--num)}.nav .it.on em{color:var(--text-3)}
.nav .chip{min-height:38px;font-size:13.5px;padding:6px 12px;background:var(--surface-2);border:0;box-shadow:inset 0 0 0 1px var(--chrome-line);color:var(--text)}
.nav .chip em{color:var(--text-3)}
.nav .chip:hover{background:var(--hover);box-shadow:inset 0 0 0 1px var(--claret-600)}
.nav .chip.on{background:var(--here-bg);box-shadow:inset 0 0 0 1px var(--gold-500)}.nav .chip.on,.nav .it.on span{color:var(--text)}
.gtabs{display:flex;gap:4px;margin:12px 0 2px;background:var(--surface-3);border-radius:var(--r-md);padding:3px}
.gtabs button{flex:1;min-height:38px;border-radius:8px;font-size:13px;font-weight:600;color:var(--text-2);padding:4px 6px;line-height:1.1}
.gtabs button small{font-weight:600;color:var(--num)}
.gtabs button[aria-pressed=true]{background:var(--surface);color:var(--text);box-shadow:0 1px 2px rgba(16,24,40,.12),0 0 0 1px var(--chrome-line)}
html.night .gtabs button[aria-pressed=true]{background:var(--navy-600)}
.gtabs~.grp[data-g]:not(.show){display:none}
.gtabs~.grp[data-g] .gh{display:none}
.gtabs~.grp[data-g] .gh--go{display:inline-flex}
.nav__res{padding:6px 10px 16px}
.nav .res{padding:10px;border-radius:var(--r-md);border-left:3px solid transparent}
.res .rt{color:var(--text)}.res .rx{color:var(--text-3)}.res em{color:var(--num)}
.res mark{background:rgba(240,165,0,.35);color:inherit}
.res:hover,.res.act{background:var(--hover);border-left-color:var(--gold-500)}
.nav__foot{display:none}
/* offline footer: the existing #dlRow (downloads.js) */
.dlrow{border-top:1px solid var(--chrome-line);padding:10px 12px calc(10px + env(safe-area-inset-bottom)) 20px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-2);flex:none;flex-wrap:nowrap}
.dlrow[hidden]{display:none}
.dlrow>svg.i{color:var(--text-2)}
.dlrow .grow{flex:1;min-width:0}
.dlrow .grow b{display:block;color:var(--text);font-weight:600;font-size:13.5px}
.dlrow .grow span{display:block}
.dlrow .ok{color:var(--ok)}
.dlrow button{font:inherit;font-size:13px;font-weight:600;height:34px;padding:0 12px;border-radius:var(--r-md);border:0;box-shadow:inset 0 0 0 1px var(--chrome-line);background:none;color:var(--text);cursor:pointer;white-space:nowrap}
.dlrow button.p{background:var(--primary);color:var(--on-primary);box-shadow:none}
.dlrow button:hover{filter:brightness(1.08)}
.dlrow button[hidden]{display:none}

/* ---------- zoom ---------- */
.zoom{background:var(--stage)}
.zoom__bar{height:calc(var(--hdr) + env(safe-area-inset-top));padding:env(safe-area-inset-top) max(8px,env(safe-area-inset-right)) 0 max(8px,env(safe-area-inset-left));background:var(--chrome);border-bottom:1px solid var(--chrome-line);display:grid;grid-template-columns:1fr minmax(0,auto) 1fr;align-items:center;gap:12px;justify-content:normal;color:var(--text)}
#zLabel{min-width:0;max-width:min(560px,46vw);text-align:center;font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.zr{display:flex;align-items:center;justify-content:flex-end;min-width:0}
.zctl{display:flex;align-items:center;background:var(--surface-3);border-radius:var(--r-md);padding:2px;margin:0 6px}
.zctl .ib{width:38px;height:38px}.zctl .ib::before{inset:2px}
.zctl output{min-width:50px;text-align:center;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}
.zoom__pane img{box-shadow:var(--page-shadow);background:#fff;filter:var(--page-filter)}
.zchip{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--chrome-solid);color:var(--text-2);box-shadow:var(--pop-shadow);border-radius:100px;padding:8px 14px;font-size:13px;display:flex;gap:8px;align-items:center;z-index:102}
.zchip[hidden]{display:none}
.spin{width:14px;height:14px;border-radius:50%;border:2px solid var(--track);border-top-color:var(--gold-500);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- sample and preview banner: a 38px claret strip that hides with the top bar ---------- */
.sbar{top:calc(var(--hdr) + env(safe-area-inset-top));background:var(--claret-600);transition:transform var(--t-chrome) var(--ease),opacity var(--t-chrome) var(--ease)}
.sbar button{background:var(--gold-500);color:#0E1A31}
.toast{bottom:calc(var(--bar) + 18px + env(safe-area-inset-bottom));background:var(--chrome-solid);color:var(--text);border-color:var(--chrome-line);box-shadow:var(--pop-shadow)}

/* ================= tablet and phone ================= */
@media (max-width:1100px){
  .pg{box-shadow:0 8px 22px -10px rgba(16,24,40,.30)}   /* one light layer: the three-layer desktop shadow is costly to repaint on every curl frame */
  .hdr{grid-template-columns:auto minmax(0,1fr) auto}
  .hdr__c{max-width:none}
  .lib-label{display:none}
  .bar{grid-template-columns:minmax(160px,240px) 1fr auto;gap:18px}
}
@media (max-width:900px) and (min-width:641px){ #btnSearch,#btnFs{display:none} }
@media (max-width:640px){
  :root{--hdr:52px;--bar:74px}
  .desk{display:none!important}
  .phone-only{display:flex!important}
  .hdr{grid-template-columns:auto minmax(0,1fr) auto;gap:2px;padding-left:max(2px,env(safe-area-inset-left));padding-right:max(2px,env(safe-area-inset-right))}
  .hdr .textbtn{min-width:44px;justify-content:center;padding:0}
  #bookTitle{display:none}
  .hdr .crumb{display:block}
  .hdr__c{text-align:center;max-width:none}
  .bar{grid-template-columns:1fr auto;grid-template-rows:30px 30px;gap:0 12px;align-content:center;padding-top:2px}
  .bar .scrub{grid-column:1/-1;grid-row:1;height:30px}
  .scrub::before{inset:-6px 0}
  .crumb--bar{grid-row:2;padding:2px 6px;margin-left:-6px;flex-direction:row;gap:6px;align-items:baseline;justify-content:flex-start;min-width:0}
  .crumb--bar .eyebrow{display:none}
  .crumb--bar b{font-size:13px;font-weight:500;color:var(--text-2)}
  .crumb--bar .chp{display:inline}
  .pagebox{grid-row:2}.pagebox small{display:none}
  .jump{font-size:13px}.jump input{width:44px;height:28px}
  .stage{padding:calc(var(--hdr) + 10px + env(safe-area-inset-top)) 0 calc(var(--bar) + 12px + env(safe-area-inset-bottom))}
  body.is-sample .stage,body.is-preview .stage{padding-top:calc(var(--hdr) + 10px + var(--sbar) + env(safe-area-inset-top))}
  .pg{border-radius:0;box-shadow:none}   /* edge to edge: no shadow to see, and a blurred shadow repainted every curl frame is costly on a phone */
  /* swipe and edge taps turn pages on a phone: the two arrow controls are hidden (still in the DOM; every swipe and tap zone is untouched) */
  .edge{display:none}
  .nav{width:100vw;border-radius:0;z-index:70}
  .pop.sheet{left:8px!important;right:8px!important;top:auto!important;bottom:calc(var(--bar) + 8px + env(safe-area-inset-bottom))!important;width:auto;min-width:0;transform-origin:bottom center;border-radius:var(--r-xl)}
  .zoom .zhide{display:none}
  .zoom__bar{grid-template-columns:auto minmax(0,1fr) auto;gap:2px}
  .zoom__bar #zLabel{max-width:none}
  .zoom__bar .textbtn span{display:none}
  .sbar{gap:8px;font-size:12px;justify-content:space-between}
}
@media (max-width:480px){#btnFs{display:none}}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:0s!important;animation:none!important}
  body.chrome-hidden .hdr,body.chrome-hidden .bar{transform:none}
}