:root{
  --navy:#112A54;
  --navy-2:#1C3D73;
  --red:#C3171D;
  --red-2:#E0262D;
  --teal:#2B7999;
  --teal-soft:#E3F0F5;
  --ink:#16233B;
  --muted:#5E6B80;
  --line:#DCE3EC;
  --paper:#FFFFFF;
  --bg-1:#F3F6FA;
  --bg-2:#E2E9F2;
  --shadow:0 18px 50px rgba(17,42,84,.22);
  --radius:14px;
  --display:"Saira","Poppins",sans-serif;
  --body:"Poppins",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bar-h:66px;
  --foot-h:64px;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font-family:var(--body);color:var(--ink);overflow:hidden;
  background:var(--bg-1);
  -webkit-font-smoothing:antialiased;
}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
[hidden]{display:none!important}

/* ---------- Loader ---------- */
.loader{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;
  background:radial-gradient(circle at 50% 40%,#fff 0%,var(--bg-1) 55%,var(--bg-2) 100%);transition:opacity .6s ease,visibility .6s}
.loader.done{opacity:0;visibility:hidden}
.loader-logo{width:220px;max-width:60vw;animation:float 2.4s ease-in-out infinite}
.loader-bar{width:220px;max-width:60vw;height:5px;border-radius:5px;background:var(--line);overflow:hidden}
.loader-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--navy),var(--red));border-radius:5px;transition:width .25s ease}
.loader-text{margin:0;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* ---------- Top bar ---------- */
.topbar{position:fixed;top:0;left:0;right:0;height:var(--bar-h);z-index:20;display:flex;align-items:center;gap:18px;
  padding:0 18px;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);box-shadow:0 2px 18px rgba(17,42,84,.08)}
.brand img{height:34px;display:block}
.title-block{display:flex;flex-direction:column;min-width:0;padding-left:18px;position:relative}
.title-block::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:4px;background:linear-gradient(var(--red),var(--navy))}
.eyebrow{font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);white-space:nowrap}
.title-block h1{margin:0;font-family:var(--display);font-style:italic;font-weight:800;font-size:19px;color:var(--navy);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.01em}
.top-actions{margin-left:auto;display:flex;align-items:center;gap:6px}
.icon-btn{position:relative;width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;color:var(--navy);transition:background .2s,color .2s,transform .2s;text-decoration:none}
.icon-btn:hover{background:var(--teal-soft);color:var(--teal)}
.icon-btn:active{transform:scale(.94)}
.icon-btn.active{background:var(--navy);color:#fff}
.icon-btn.sm{width:38px;height:38px;border-radius:10px}
.badge{position:absolute;top:4px;right:3px;min-width:17px;height:17px;padding:0 4px;border-radius:9px;background:var(--red);color:#fff;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;border:2px solid #fff}
.cta{margin-left:8px;display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 18px;border-radius:12px;background:linear-gradient(135deg,var(--red-2),var(--red));color:#fff;
  font-weight:600;font-size:14px;text-decoration:none;box-shadow:0 6px 16px rgba(195,23,29,.28);transition:transform .2s,box-shadow .2s;white-space:nowrap}
.cta:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(195,23,29,.34)}

/* ---------- Stage ---------- */
.stage{position:fixed;top:var(--bar-h);bottom:var(--foot-h);left:0;right:0;display:flex;align-items:center;justify-content:center;
  background:
    linear-gradient(115deg,transparent 0 62%,rgba(17,42,84,.045) 62% 66%,transparent 66% 69%,rgba(195,23,29,.04) 69% 71%,transparent 71%),
    radial-gradient(ellipse at 50% 45%,#FFFFFF 0%,var(--bg-1) 45%,var(--bg-2) 100%);
}
.book-wrap{position:relative;transition:opacity .5s ease, transform .6s cubic-bezier(.2,.8,.2,1);opacity:0;transform:translateY(14px) scale(.98)}
.book-wrap.ready{opacity:1;transform:none}
#book{filter:drop-shadow(0 22px 40px rgba(17,42,84,.25))}
.page{background:#fff;overflow:hidden;position:relative}
.page img.pg{width:100%;height:100%;display:block;object-fit:cover;user-select:none;-webkit-user-drag:none;pointer-events:none;background:#F4F6F9}
.page .ribbon{position:absolute;top:-4px;right:9%;width:26px;height:58px;background:linear-gradient(180deg,var(--red-2),var(--red));
  clip-path:polygon(0 0,100% 0,100% 100%,50% 78%,0 100%);transform:translateY(-70px);transition:transform .45s cubic-bezier(.3,1.6,.5,1);z-index:3;
  filter:drop-shadow(0 3px 4px rgba(0,0,0,.25))}
.page.bookmarked .ribbon{transform:translateY(0)}
.page .hot{position:absolute;z-index:4;border-radius:8px;transition:background .2s,box-shadow .2s;cursor:pointer}
.page .hot:hover{background:rgba(43,121,153,.14);box-shadow:inset 0 0 0 2px rgba(43,121,153,.55)}
/* inner spine shading */
.page.pl::after,.page.pr::after{content:"";position:absolute;top:0;bottom:0;width:7%;pointer-events:none;z-index:2}
.page.pl::after{right:0;background:linear-gradient(90deg,rgba(0,0,0,0),rgba(17,42,84,.14))}
.page.pr::after{left:0;background:linear-gradient(270deg,rgba(0,0,0,0),rgba(17,42,84,.14))}

.nav-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:52px;height:52px;border-radius:50%;background:#fff;color:var(--navy);
  display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(17,42,84,.16);transition:background .2s,color .2s,transform .2s,opacity .3s}
.nav-arrow svg{width:24px;height:24px}
.nav-arrow:hover{background:var(--navy);color:#fff;transform:translateY(-50%) scale(1.06)}
.nav-arrow.prev{left:22px}.nav-arrow.next{right:22px}
.nav-arrow:disabled{opacity:0;pointer-events:none}

.section-chip{position:absolute;top:14px;left:50%;transform:translateX(-50%);z-index:5;display:flex;align-items:center;gap:8px;padding:7px 16px;border-radius:30px;
  background:#fff;box-shadow:0 6px 18px rgba(17,42,84,.12);font-size:12.5px;color:var(--muted);white-space:nowrap;transition:opacity .3s}
.section-chip b{color:var(--navy);font-weight:600}
.section-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px rgba(195,23,29,.15)}

.hint{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:10px;padding:10px 18px;border-radius:30px;
  background:var(--navy);color:#fff;font-size:13px;box-shadow:var(--shadow);opacity:0;transition:opacity .5s;pointer-events:none;white-space:nowrap}
.hint.show{opacity:1}

/* ---------- Bottom bar ---------- */
.bottombar{position:fixed;left:0;right:0;bottom:0;height:var(--foot-h);z-index:20;display:flex;align-items:center;gap:18px;padding:0 18px;
  background:rgba(255,255,255,.94);backdrop-filter:blur(10px);box-shadow:0 -2px 18px rgba(17,42,84,.07)}
.bb-left,.bb-right{display:flex;align-items:center;gap:6px}
.bb-right{gap:10px}
#soundBtn .off{display:none}
#soundBtn.muted .on{display:none}
#soundBtn.muted .off{display:block}
.scrubber{flex:1;min-width:0;padding:0 8px}
.track{position:relative;height:28px;cursor:pointer;touch-action:none}
.track::before{content:"";position:absolute;left:0;right:0;top:12px;height:5px;border-radius:5px;background:var(--line)}
.track-fill{position:absolute;left:0;top:12px;height:5px;border-radius:5px;background:linear-gradient(90deg,var(--navy),var(--teal));width:0;transition:width .35s ease}
.ticks{position:absolute;inset:0;pointer-events:none}
.ticks i{position:absolute;top:9px;width:2px;height:11px;border-radius:2px;background:rgba(17,42,84,.22)}
.knob{position:absolute;top:6px;width:17px;height:17px;margin-left:-8.5px;border-radius:50%;background:#fff;border:4px solid var(--red);box-shadow:0 2px 8px rgba(195,23,29,.35);transition:left .35s ease}
.track.dragging .knob,.track.dragging .track-fill{transition:none}
.preview{position:absolute;bottom:34px;width:118px;margin-left:-59px;padding:6px;border-radius:12px;background:#fff;box-shadow:var(--shadow);opacity:0;transform:translateY(6px);
  transition:opacity .2s,transform .2s;pointer-events:none;text-align:center}
.preview img{width:100%;border-radius:6px;display:block;aspect-ratio:1/1.414;object-fit:cover;background:var(--bg-1)}
.preview span{display:block;font-size:11px;font-weight:600;color:var(--navy);margin-top:5px;line-height:1.3}
.track:hover .preview,.track.dragging .preview{opacity:1;transform:none}
.pager{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}
.pager input{width:62px;height:36px;border-radius:10px;border:1.5px solid var(--line);text-align:center;font:600 13px var(--body);color:var(--navy);background:#fff;outline:none;transition:border .2s}
.pager input:focus{border-color:var(--teal)}
.pager b{color:var(--navy)}
.bm-toggle{display:inline-flex;align-items:center;gap:7px;height:38px;padding:0 14px;border-radius:10px;border:1.5px solid var(--line);color:var(--navy);font-size:13px;font-weight:600;transition:all .2s}
.bm-toggle:hover{border-color:var(--red);color:var(--red)}
.bm-toggle.on{background:var(--red);border-color:var(--red);color:#fff}
.bm-toggle.on svg{fill:#fff}

/* ---------- Drawer ---------- */
.scrim{position:fixed;inset:0;z-index:30;background:rgba(17,42,84,.28);backdrop-filter:blur(2px);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.scrim.show{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;bottom:0;right:0;width:400px;max-width:100%;z-index:40;background:#fff;display:flex;flex-direction:column;
  box-shadow:-20px 0 50px rgba(17,42,84,.18);transform:translateX(105%);transition:transform .42s cubic-bezier(.2,.8,.2,1)}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;gap:8px;padding:16px 14px 12px 18px}
.tabs{flex:1;display:flex;gap:4px;padding:4px;border-radius:12px;background:var(--bg-1)}
.tabs button{flex:1;height:34px;border-radius:9px;font-size:12.5px;font-weight:600;color:var(--muted);transition:all .2s}
.tabs button.active{background:#fff;color:var(--navy);box-shadow:0 2px 8px rgba(17,42,84,.1)}
.tab-body{display:none;flex:1;overflow-y:auto;padding:6px 18px 24px}
.tab-body.active{display:block;animation:fadeUp .35s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.grp{margin:14px 0 6px}
.grp-title{display:flex;align-items:center;gap:8px;font-family:var(--display);font-style:italic;font-weight:800;font-size:14px;color:var(--navy);letter-spacing:.02em;text-transform:uppercase;margin:0 0 6px}
.grp-title::before{content:"";width:14px;height:4px;border-radius:3px;background:var(--red)}
.sec{width:100%;display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:10px;text-align:left;transition:background .2s}
.sec:hover{background:var(--bg-1)}
.sec.active{background:var(--teal-soft)}
.sec.active .sec-name{color:var(--teal)}
.sec img{width:34px;height:48px;object-fit:cover;border-radius:4px;box-shadow:0 2px 6px rgba(17,42,84,.18);background:var(--bg-1)}
.sec-name{flex:1;font-size:13.5px;font-weight:500;color:var(--ink)}
.sec-pg{font-size:11.5px;font-weight:600;color:var(--muted);background:var(--bg-1);padding:3px 8px;border-radius:20px;white-space:nowrap}
.sec.active .sec-pg{background:#fff;color:var(--teal)}

.bm-intro{padding:14px;border-radius:var(--radius);background:linear-gradient(135deg,var(--teal-soft),#F6F9FC);margin:8px 0 16px}
.bm-intro p{margin:0 0 12px;font-size:13px;color:var(--muted);line-height:1.55}
.soft-btn{display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 14px;border-radius:10px;background:var(--navy);color:#fff;font-size:13px;font-weight:600;transition:background .2s}
.soft-btn:hover{background:var(--navy-2)}
.bm-item{display:flex;align-items:center;gap:12px;padding:10px;border-radius:12px;margin-bottom:8px;background:#fff;box-shadow:0 0 0 1.5px var(--line);transition:box-shadow .2s;cursor:pointer;animation:fadeUp .3s ease}
.bm-item:hover{box-shadow:0 0 0 1.5px var(--teal),0 6px 16px rgba(17,42,84,.08)}
.bm-item img{width:44px;height:62px;object-fit:cover;border-radius:5px;box-shadow:0 2px 6px rgba(17,42,84,.18)}
.bm-info{flex:1;min-width:0}
.bm-info b{display:block;font-size:13.5px;color:var(--navy);font-weight:600}
.bm-info span{font-size:12px;color:var(--muted)}
.bm-del{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--muted);transition:all .2s}
.bm-del:hover{background:#FDECEC;color:var(--red)}
.bm-del svg{width:17px;height:17px}
.empty{text-align:center;padding:28px 10px;color:var(--muted);font-size:13px;line-height:1.6}
.empty svg{width:38px;height:38px;color:var(--line);display:block;margin:0 auto 10px}

.search-box{display:flex;align-items:center;gap:10px;height:46px;padding:0 14px;border-radius:12px;border:1.5px solid var(--line);margin:8px 0 12px;transition:border .2s;color:var(--muted)}
.search-box:focus-within{border-color:var(--teal);color:var(--teal)}
.search-box input{flex:1;border:0;outline:none;font:14px var(--body);color:var(--ink);background:none;min-width:0}
.search-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.search-tags button{padding:6px 11px;border-radius:20px;background:var(--bg-1);font-size:12px;color:var(--navy);font-weight:500;transition:all .2s}
.search-tags button:hover{background:var(--navy);color:#fff}
.res{display:flex;gap:12px;padding:10px;border-radius:12px;cursor:pointer;transition:background .2s;animation:fadeUp .3s ease}
.res:hover{background:var(--bg-1)}
.res img{width:44px;height:62px;object-fit:cover;border-radius:5px;box-shadow:0 2px 6px rgba(17,42,84,.18);flex:none}
.res b{font-size:13px;color:var(--navy);font-weight:600}
.res p{margin:3px 0 0;font-size:12px;line-height:1.5;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.res mark{background:#FDE3E4;color:var(--red);border-radius:3px;padding:0 2px;font-weight:600}
.res-count{font-size:12px;color:var(--muted);margin:0 0 6px 2px}

.thumb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px 12px;padding-top:8px}
.thumb{cursor:pointer;text-align:center;position:relative}
.thumb img{width:100%;aspect-ratio:1/1.414;object-fit:cover;border-radius:6px;box-shadow:0 3px 10px rgba(17,42,84,.14);transition:transform .2s,box-shadow .2s;display:block;background:var(--bg-1)}
.thumb:hover img{transform:translateY(-3px);box-shadow:0 10px 20px rgba(17,42,84,.2)}
.thumb.current img{box-shadow:0 0 0 3px var(--teal),0 8px 18px rgba(17,42,84,.18)}
.thumb span{display:block;margin-top:6px;font-size:11.5px;font-weight:600;color:var(--muted)}
.thumb.marked::after{content:"";position:absolute;top:-3px;right:10%;width:12px;height:22px;background:var(--red);clip-path:polygon(0 0,100% 0,100% 100%,50% 75%,0 100%)}

/* ---------- Zoom ---------- */
.zoom{position:fixed;inset:0;z-index:60;background:var(--bg-2);display:flex;flex-direction:column;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.zoom.open{opacity:1;visibility:visible}
.zoom-bar{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 16px 0 22px;background:#fff;box-shadow:0 2px 14px rgba(17,42,84,.08)}
.zoom-title{font-family:var(--display);font-style:italic;font-weight:800;color:var(--navy);font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.zoom-ctrl{display:flex;align-items:center;gap:6px}
.zoom-ctrl span{min-width:52px;text-align:center;font-weight:600;font-size:13px;color:var(--navy)}
.zoom-view{flex:1;overflow:auto;cursor:grab;touch-action:pan-x pan-y}
.zoom-view.grabbing{cursor:grabbing}
.zoom-canvas{display:flex;gap:0;margin:auto;padding:30px;width:max-content}
.zoom-canvas img{display:block;box-shadow:var(--shadow);background:#fff;user-select:none;-webkit-user-drag:none}
.zoom-tip{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);margin:0;padding:8px 16px;border-radius:20px;background:#fff;color:var(--muted);font-size:12px;box-shadow:0 6px 16px rgba(17,42,84,.12);pointer-events:none}

.toast{position:fixed;left:50%;bottom:calc(var(--foot-h) + 18px);transform:translate(-50%,20px);z-index:80;padding:11px 18px;border-radius:12px;background:var(--navy);color:#fff;font-size:13px;font-weight:500;
  box-shadow:var(--shadow);opacity:0;transition:all .35s cubic-bezier(.2,.8,.2,1);pointer-events:none;white-space:nowrap}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .title-block{display:none}
  .cta span{display:none}
  .cta{padding:0 12px;margin-left:4px}
}
@media (max-width:640px){
  :root{--bar-h:58px;--foot-h:62px}
  .topbar{padding:0 10px;gap:8px}
  .brand img{height:26px}
  .top-actions{gap:2px}
  .icon-btn{width:38px;height:38px}
  .hide-sm{display:none!important}
  .nav-arrow{width:40px;height:40px;opacity:.92}
  .nav-arrow.prev{left:6px}.nav-arrow.next{right:6px}
  .bottombar{gap:8px;padding:0 10px}
  #firstBtn,#lastBtn,#soundBtn{display:none}
  .pager input{width:48px}
  .bm-toggle{padding:0 10px}
  .section-chip{font-size:11.5px;top:8px;max-width:92vw}
  .section-chip #chipGroup{display:none}
  .hint{font-size:12px;white-space:normal;width:86%;text-align:left}
  .drawer{width:100%}
  .thumb-grid{grid-template-columns:repeat(3,1fr)}
}

/* ---------- Bookmark picker ---------- */
.bm-picker{position:fixed;bottom:calc(var(--foot-h) + 10px);z-index:50;padding:14px;border-radius:16px;background:#fff;box-shadow:var(--shadow);animation:fadeUp .25s ease}
.bm-picker p{margin:0 0 10px;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.bm-pick-row{display:flex;gap:10px}
.bm-pick-row button{width:96px;padding:6px;border-radius:12px;box-shadow:0 0 0 1.5px var(--line);transition:box-shadow .2s;text-align:center}
.bm-pick-row button:hover{box-shadow:0 0 0 2px var(--teal)}
.bm-pick-row button.on{box-shadow:0 0 0 2px var(--red)}
.bm-pick-row img{width:100%;aspect-ratio:1/1.414;object-fit:cover;border-radius:6px;display:block}
.bm-pick-row span{display:block;margin-top:6px;font-size:11.5px;font-weight:600;color:var(--navy)}
.bm-pick-row button.on span{color:var(--red)}
.portrait .page::after{display:none}