/* Booklet Reader — dark mode (Outfit headings, Poppins body) */
@font-face{font-family:"Outfit";src:url("assets/Outfit.ttf") format("truetype");font-weight:100 900;font-display:swap}
@font-face{font-family:"Poppins";src:url("assets/Poppins-Regular.ttf") format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:"Poppins";src:url("assets/Poppins-Medium.ttf") format("truetype");font-weight:500;font-display:swap}
@font-face{font-family:"Poppins";src:url("assets/Poppins-SemiBold.ttf") format("truetype");font-weight:600;font-display:swap}

:root{
  --navy:#2A4492; --red:#E83C25; --yellow:#FADB14; --charcoal:#2E2E33;
  --deep:#1D2339; --deeper:#171C2F; --surface:#252D4A; --surface2:#2F3858; --bar:#171C2F;
  --line:rgba(233,237,247,.12); --text:#E9EDF7; --muted:#A3AECF; --cream:#F7F5F1;
  --ink:#1F2937;
  --top:56px; --bottom:112px; --left:0px;
  --pw:400px; --ph:566px; --shift:0px; --lw:0px; --rw:0px;
  --dur:.9s; --ease:cubic-bezier(.45,.05,.25,1);
  --sat:env(safe-area-inset-top,0px); --sab:env(safe-area-inset-bottom,0px);
  --head:"Outfit",system-ui,sans-serif; --body:"Poppins",system-ui,sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;margin:0;background:var(--deeper);color:var(--text);font-family:var(--body);font-size:14px;overflow:hidden;overscroll-behavior:none}
button{font:inherit;color:inherit;cursor:pointer}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
:focus-visible{outline:2px solid var(--yellow);outline-offset:2px;border-radius:8px}
kbd{font:600 11px var(--body);background:var(--surface2);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:1px 6px}
[hidden]{display:none!important}

body::before{content:none}
html,body{background:var(--deep)}

/* ---------- header ---------- */
#top{position:fixed;z-index:30;top:0;left:0;right:0;height:calc(var(--top) + var(--sat));padding:var(--sat) 14px 0;
  display:flex;align-items:center;gap:14px;background:var(--bar);border-bottom:1px solid var(--line);
  transition:transform .35s var(--ease),opacity .35s}
.doc-title{display:flex;flex-direction:column;min-width:0;line-height:1.15}
.eyebrow{font:500 11px var(--body);color:var(--muted)}
.name{font:600 15px var(--head);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top-tools{margin-left:auto;display:flex;gap:2px}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:3px;background:transparent}
.progress i{display:block;height:100%;width:0;background:var(--yellow);transition:width .5s var(--ease)}

/* ---------- buttons ---------- */
.ib{display:inline-grid;place-items:center;width:44px;height:44px;border:0;background:transparent;border-radius:10px;color:var(--text);transition:background .15s,color .15s}
.ib:hover{background:rgba(255,255,255,.08)}
.ib:active{background:rgba(255,255,255,.18)}
.ib.on,.mb.on{background:var(--yellow);color:var(--ink)}
.ib[disabled]{opacity:.35;pointer-events:none}
.primary{border:0;border-radius:10px;background:var(--yellow);color:var(--ink);font:600 15px var(--body);padding:0 18px;min-height:44px}
.primary:hover{background:#ffe53d}.primary:active{background:#e2c500}
.primary.big{display:inline-flex;gap:10px;align-items:center;font-size:16px;padding:0 28px;min-height:50px}
.ghost{background:transparent;border:1px solid var(--line);border-radius:10px;padding:0 16px;min-height:44px;color:var(--text);transition:background .2s,border-color .2s}
.ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.3)}
.zl{border:0;background:transparent;font:500 13px var(--body);min-width:52px;height:44px;border-radius:10px;color:var(--muted)}
.zl:hover{background:rgba(255,255,255,.08);color:var(--text)}
.muted{color:var(--muted)}

/* ---------- footer ---------- */
#bar{position:fixed;z-index:30;left:0;right:0;bottom:0;padding:8px 14px calc(8px + var(--sab));
  background:var(--bar);
  border-top:1px solid var(--line);transition:transform .35s var(--ease),opacity .35s}
.bar-row{display:flex;align-items:center;gap:6px;max-width:1280px;margin:0 auto}
.scrub{position:relative;flex:1;min-width:80px;padding:0 6px}
.tip{border-radius:6px;position:absolute;bottom:34px;transform:translateX(-50%);background:var(--yellow);color:var(--ink);font:600 12px var(--body);padding:3px 9px;pointer-events:none;white-space:nowrap}
.tip::after{content:"";position:absolute;left:50%;bottom:-4px;width:8px;height:8px;background:inherit;transform:translateX(-50%) rotate(45deg)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:36px;background:transparent;margin:0;cursor:pointer;--p:0%}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:6px;background:var(--yellow);background:linear-gradient(var(--yellow),var(--yellow)) 0/var(--p) 100% no-repeat,rgba(255,255,255,.18)}
input[type=range]::-moz-range-track{height:6px;border-radius:6px;background:rgba(255,255,255,.14)}
input[type=range]::-moz-range-progress{height:6px;border-radius:6px;background:var(--yellow)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--cream);border:3px solid var(--navy);margin-top:-7px;box-shadow:0 2px 10px rgba(0,0,0,.5);transition:transform .15s}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--cream);border:3px solid var(--navy)}
input[type=range]:hover::-webkit-slider-thumb,input[type=range]:active::-webkit-slider-thumb{transform:scale(1.2)}
.pageno{display:flex;align-items:center;gap:6px;font:500 13px var(--head);color:var(--muted);white-space:nowrap;padding:0 4px}
.pageno input{width:48px;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:9px;color:var(--text);font:600 14px var(--head);padding:7px 4px}
.pageno input:focus{border-color:var(--yellow);outline:none}
.tools{display:flex;align-items:center;gap:2px}
.sep{width:1px;height:22px;background:var(--line);margin:0 6px}
.m-only{display:none}
.mb{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:48px;border:0;background:transparent;border-radius:10px;padding:4px 2px;font:500 11px var(--body);color:var(--muted)}
.mb svg{width:21px;height:21px}
.mb:active{background:rgba(255,255,255,.08)}
.accent-on.on{background:var(--yellow);color:var(--ink)}
.mb.on{color:var(--ink)}

/* ---------- stage & book ---------- */
#stage{position:fixed;z-index:5;top:calc(var(--top) + var(--sat));bottom:var(--bottom);left:var(--left);right:0;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none;cursor:default;transition:left .3s var(--ease)}
#stage.zoomed{cursor:grab}#stage.zoomed.dragging{cursor:grabbing}
#zoomwrap{position:absolute;inset:0;display:grid;place-items:center;transform-origin:50% 50%;will-change:transform}
#book{position:relative;width:calc(var(--pw) * 2);height:var(--ph);transform:translateX(var(--shift));perspective:2600px;perspective-origin:50% 40%;
  transition:transform var(--dur) var(--ease)}
#book.single{width:var(--pw)}
body.opening #book{animation:bookIn 1.1s var(--ease) both}
@keyframes bookIn{from{opacity:0;transform:translateX(var(--shift)) translateY(40px) rotateX(14deg) scale(.94)}to{opacity:1;transform:translateX(var(--shift))}}

.floor{display:none}
.slot{position:absolute;top:0;width:var(--pw);height:var(--ph)}
.slot-l{left:0}.slot-r{left:var(--pw)}
#book.single .slot-l,#book.single .cast-l,#book.single .stack,#book.single .spine{display:none}
#book.single .slot-r{left:0}
.page{position:relative;width:100%;height:100%;background:var(--cream);overflow:hidden;box-shadow:0 18px 50px rgba(0,0,0,.45),0 2px 6px rgba(0,0,0,.3);transition:opacity .25s}
.page canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.page.empty{opacity:0;box-shadow:none;pointer-events:none}
.slot-l .page{border-radius:5px 1px 1px 5px}
.slot-r .page,.face.front .page{border-radius:1px 5px 5px 1px}
.face.back .page{border-radius:5px 1px 1px 5px}
/* gutter */
.slot-r .page::after,.face.front .page::after{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:rgba(0,0,0,.14);pointer-events:none}
.slot-l .page::after,.face.back .page::after{content:"";position:absolute;right:0;top:0;bottom:0;width:2px;background:rgba(0,0,0,.14);pointer-events:none}
.page.loading{background:#ece8df;animation:pulseBg 1.2s ease-in-out infinite alternate}
@keyframes pulseBg{to{background:#f6f3ec}}
.spine{position:absolute;left:50%;top:0;bottom:0;width:1px;margin-left:-.5px;background:rgba(0,0,0,.4);pointer-events:none;opacity:1;transition:opacity .4s}
#book.closed .spine{opacity:0}

/* page-thickness stacks */
.stack{position:absolute;top:1.2%;bottom:1.2%;width:var(--w,0px);transition:width var(--dur) var(--ease);
  background:#d9d4c7;box-shadow:0 8px 24px rgba(0,0,0,.35)}
.stack-l{left:0;transform:translateX(-100%);--w:var(--lw);border-radius:4px 0 0 4px}
.stack-r{left:100%;--w:var(--rw);border-radius:0 4px 4px 0}

/* turning leaf */
.leaf{position:absolute;top:0;left:50%;width:50%;height:100%;transform-origin:0 50%;transform-style:preserve-3d;will-change:transform;z-index:6}
#book.single .leaf{left:0;width:100%}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;transform:translateZ(0)}
.face.back{transform:rotateY(180deg) translateZ(0)}
.shade{position:absolute;inset:0;pointer-events:none;opacity:0;border-radius:inherit}
.face .shade{background:#000}
.cast{position:absolute;top:0;width:var(--pw);height:100%;pointer-events:none;opacity:0;z-index:5}
.cast-l{left:0;background:#000}
.cast-r{left:var(--pw);background:#000}
#book.single .cast-r{left:0}

/* search highlights, ribbon */
.hl{position:absolute;inset:0;pointer-events:none;z-index:3}
.hl i{position:absolute;background:rgba(250,219,20,.55);mix-blend-mode:multiply;border-radius:3px;box-shadow:0 0 0 2px rgba(232,60,37,.55);animation:pulse 1.6s ease-out 2}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(232,60,37,.9)}100%{box-shadow:0 0 0 14px rgba(232,60,37,0)}}
.ribbon{position:absolute;top:-2px;right:7%;width:22px;height:0;background:var(--red);z-index:4;transition:height .45s var(--ease);
  clip-path:polygon(0 0,100% 0,100% 100%,50% 82%,0 100%);filter:drop-shadow(0 4px 4px rgba(0,0,0,.4))}
.page.marked .ribbon{height:11%}
.slot-l .ribbon{right:auto;left:7%}

/* edge arrows */
.edge{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:84px;display:grid;place-items:center;border:0;border-radius:14px;
  background:var(--bar);color:var(--text);opacity:0;transition:opacity .25s,background .2s;z-index:10}
.edge-l{left:12px}.edge-r{right:12px}
#stage:hover .edge{opacity:.55}.edge:hover{opacity:1!important;background:var(--navy)}
.edge[disabled]{display:none}
@media (hover:none){.edge{display:none}}
.chip{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);display:flex;align-items:center;gap:8px;background:var(--yellow);color:var(--ink);font:500 13px var(--body);padding:8px 16px 8px 12px;border-radius:99px;z-index:10;animation:chipIn .4s var(--ease)}
.chip svg{width:16px;height:16px;}
@keyframes chipIn{from{opacity:0;transform:translate(-50%,10px)}}

/* ---------- focus mode ---------- */
body.focus #stage{top:0;bottom:0}
body.focus #top{transform:translateY(-100%);opacity:0;pointer-events:none}
body.focus #bar{transform:translateY(100%);opacity:0;pointer-events:none}

/* ---------- side panel ---------- */
#panel{position:fixed;z-index:40;top:calc(var(--top) + var(--sat));bottom:0;left:0;width:min(340px,100vw);background:var(--deep);
  border-right:1px solid var(--line);display:flex;flex-direction:column;animation:slideIn .3s var(--ease);}
@keyframes slideIn{from{transform:translateX(-30px);opacity:0}}
.panel-head{display:flex;align-items:center;gap:6px;padding:10px 10px 8px 12px;border-bottom:1px solid var(--line)}
.tabs{display:flex;gap:2px;flex:1;background:var(--deeper);padding:3px;border-radius:10px}
.tabs button{flex:1;border:0;background:transparent;font:500 13px var(--body);padding:9px 2px;border-radius:8px;color:var(--muted);min-height:44px}
.tabs button[aria-selected=true]{background:var(--navy);color:#fff}
.panel-body{flex:1;overflow:auto;padding:12px;overscroll-behavior:contain}
.panel-body section{display:none}.panel-body section.on{display:block}
.thumbs{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.thumb{background:none;border:0;padding:0;text-align:center;color:var(--muted);font:500 12px var(--head);border-radius:6px}
.thumb canvas{display:block;width:100%;aspect-ratio:var(--ratio,.707);background:var(--cream);border-radius:3px;border:2px solid transparent;box-shadow:0 6px 16px rgba(0,0,0,.4);transition:transform .2s,border-color .2s;object-fit:cover}
.thumb:hover canvas{transform:translateY(-3px)}
.thumb.cur canvas{border-color:var(--yellow)}
.thumb.cur{color:var(--yellow)}
.thumb.marked::after{content:"";display:block;width:14px;height:6px;margin:4px auto 0;background:var(--red);border-radius:3px}
.thumb span{display:block;margin-top:6px}
#toc a,.results li button{display:block;width:100%;text-align:left;background:none;border:0;color:var(--text);padding:9px 10px;border-radius:10px;font:500 13px var(--body)}
#toc a:hover,.results li button:hover{background:rgba(255,255,255,.07)}
#toc .lvl1{padding-left:24px;color:var(--muted)}#toc .lvl2{padding-left:38px;color:var(--muted)}
#toc a{cursor:pointer}
.results{list-style:none;padding:0;margin:8px 0 0}
.results li button b{font:600 12px var(--body);color:var(--yellow);display:block;margin-bottom:2px}
.results mark{background:rgba(250,219,20,.9);color:var(--ink);border-radius:3px;padding:0 2px}
.results .rm{float:right;color:var(--muted);font-size:11px}
#searchForm{display:flex;gap:8px}
#searchIn{flex:1;min-width:0;background:var(--deeper);border:1px solid var(--line);border-radius:12px;color:var(--text);padding:10px 12px;font:14px var(--body)}
#searchIn:focus{outline:none;border-color:var(--yellow)}
#searchStatus{margin:10px 2px 0;font-size:12px}
#scrim{position:fixed;inset:0;z-index:35;background:rgba(0,0,0,.5)}
@media (min-width:1100px){#scrim{display:none}}

/* ---------- popover ---------- */
.popover{position:fixed;z-index:50;right:12px;bottom:calc(var(--bottom) + 6px);width:min(300px,calc(100vw - 24px));background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:8px;
  box-shadow:0 20px 60px rgba(0,0,0,.55);display:grid;grid-template-columns:1fr 1fr;gap:4px;animation:pop .22s var(--ease)}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.97)}}
.popover button{display:flex;align-items:center;gap:10px;border:0;background:transparent;text-align:left;font:500 13px var(--body);padding:12px 10px;min-height:44px;border-radius:10px}
.popover button:hover,.popover button:active{background:rgba(255,255,255,.08)}
.popover svg{width:19px;height:19px;color:var(--yellow)}

/* ---------- landing ---------- */
#empty{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:24px;overflow:auto;transition:opacity .5s,visibility .5s}
body:not(.no-doc) #empty{opacity:0;visibility:hidden;pointer-events:none}
body.no-doc #top,body.no-doc #bar,body.no-doc #stage{opacity:0;pointer-events:none}
body.no-doc #top .top-tools,body.no-doc .doc-title{visibility:hidden}
.empty-card{position:relative;text-align:center;max-width:560px;width:100%;padding:40px 32px 32px;border-radius:20px;background:var(--surface);border:1px solid var(--line);animation:cardIn .5s var(--ease) both}
@keyframes cardIn{from{opacity:0;transform:translateY(24px) scale(.97)}}
h1{font:600 clamp(26px,5vw,34px)/1.15 var(--head);margin:0 0 10px}
.lede{color:var(--muted);margin:0 auto 24px;max-width:42ch;line-height:1.6}
.drop-zone{border:1.5px dashed rgba(233,237,247,.3);border-radius:14px;padding:28px 16px;display:flex;flex-direction:column;gap:12px;align-items:center;margin-bottom:14px;transition:border-color .2s,background .2s}
.drop-zone.over{border-color:var(--yellow);background:rgba(250,219,20,.07)}
.or{color:var(--muted);font-size:12px}
#dropVeil{position:fixed;inset:0;z-index:90;display:grid;place-items:center;background:var(--deep);font:600 24px var(--head);border:3px dashed var(--yellow);margin:14px;border-radius:24px;inset:0;pointer-events:none}

#loading{position:fixed;inset:0;z-index:80;display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;background:var(--deep);font:500 15px var(--body)}
.spinner{width:42px;height:42px;border-radius:50%;border:4px solid rgba(255,255,255,.12);border-top-color:var(--yellow);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loadbar{width:min(260px,70vw);height:4px;border-radius:4px;background:rgba(255,255,255,.12);overflow:hidden}
.loadbar i{display:block;height:100%;width:8%;background:var(--yellow);transition:width .2s}

#toast{position:fixed;z-index:95;left:50%;bottom:calc(var(--bottom) + 18px);transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--surface2);border:1px solid var(--line);border-radius:14px;padding:10px 16px;font:500 13px var(--body);transition:opacity .3s,transform .3s var(--ease);width:max-content;max-width:calc(100vw - 32px);text-align:center}
#toast.show{opacity:1;transform:translate(-50%,0);pointer-events:auto}
#toast button{margin-left:10px;border:0;background:var(--yellow);color:var(--ink);font:600 12px var(--head);padding:4px 10px;border-radius:8px}

dialog{border:1px solid var(--line);border-radius:18px;background:var(--surface);color:var(--text);padding:28px;max-width:min(720px,calc(100vw - 24px));max-height:calc(100dvh - 24px);overflow:auto;}
dialog::backdrop{background:rgba(10,13,26,.7);}
dialog h2{font:700 24px var(--head);margin:0 0 16px}
dialog h3{font:600 14px var(--body);margin:0 0 4px;color:var(--yellow)}
dialog p{margin:0;color:var(--muted);line-height:1.6;font-size:13px}
dialog code{background:var(--surface2);padding:1px 6px;border-radius:6px;color:var(--text)}
dialog .close{position:absolute;top:14px;right:14px}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 26px}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .d-only{display:none}.m-only{display:flex}
  :root{--bottom:112px}
  #bar{padding-bottom:calc(4px + var(--sab))}
  .pageno{order:3}
  .bar-row.main-row{}
}
@media (max-width:760px){
  :root{--top:50px}
  #top{padding-left:10px;padding-right:6px;gap:10px}
  .name{font-size:13px}
  .top-tools .ib:not([data-act=open]){display:none}
  .help-grid{grid-template-columns:1fr}
  #panel{width:100vw;top:0;padding-top:var(--sat);z-index:60}
  #scrim{display:none}
  .popover{bottom:calc(var(--bottom) + 4px)}
  .empty-card{padding:32px 20px 22px}
}
@media (max-width:420px){.eyebrow{display:none}}
@media (max-height:520px) and (orientation:landscape){
  :root{--top:44px;--bottom:60px}
  .m-only{display:none}
  #bar{padding-top:4px;padding-bottom:calc(4px + var(--sab))}
  .d-only{display:flex}
  .tools .opt{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

#unfocus{position:fixed;z-index:31;top:calc(8px + var(--sat));right:8px;background:var(--bar);opacity:0;pointer-events:none;transition:opacity .3s}
body.focus #unfocus{opacity:.7;pointer-events:auto}

.sr-only{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.sr-only:focus{clip:auto;clip-path:none;width:auto;height:auto;margin:0;padding:12px;white-space:normal;position:fixed!important;left:12px;right:12px;bottom:calc(var(--bottom) + 12px);max-height:40vh;overflow:auto;background:var(--surface);border:2px solid var(--yellow);border-radius:12px;z-index:70}
.edge:focus-visible{opacity:1}
.doc-title h1.name{margin:0}
.opt{display:flex;gap:10px;align-items:flex-start;margin:0 0 18px;color:var(--muted);font-size:13px;line-height:1.5;min-height:44px}
.opt input{width:20px;height:20px;margin:2px 0 0;accent-color:var(--yellow);flex:none}
.pageno input:focus,#searchIn:focus{outline:2px solid var(--yellow);outline-offset:1px}
.tabs button{min-height:44px}
#panel section:focus-visible{outline-offset:-2px}