/* 3D Reader (light theme) — shared across pages */
.pdf-modal{
  position:fixed;inset:0;z-index:9000;
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;
  transition:opacity .38s var(--ease);
}
.pdf-modal.open{opacity:1;pointer-events:all}

.pdf-backdrop{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 520px at 22% 18%,rgba(155,123,92,.10),transparent 60%),
    radial-gradient(900px 520px at 78% 72%,rgba(155,123,92,.08),transparent 62%),
    rgba(250,249,247,.94);
  backdrop-filter:blur(18px);
  cursor:pointer;
}

.pdf-shell{
  position:relative;z-index:2;
  width:100vw;
  height:100dvh;
  max-height:100dvh;
  display:flex;flex-direction:column;
  border-radius:0;overflow:hidden;
  background:var(--bg-white);
  box-shadow:0 44px 110px rgba(0,0,0,.18),0 14px 30px rgba(0,0,0,.10),0 0 0 1px rgba(0,0,0,.06);
  animation:shellIn .38s var(--ease) forwards;
}
.pdf-shell::before{
  content:'';
  position:absolute;inset:0;
  border-radius:0;
  padding:1px;
  background:linear-gradient(180deg,rgba(155,123,92,.30),rgba(0,0,0,0));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
  z-index:3;
}
@keyframes shellIn{from{transform:scale(.96) translateY(12px)}to{transform:none}}

.pdf-topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;
  background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(246,244,241,.82));
  border-bottom:1px solid rgba(0,0,0,.08);
  gap:14px;flex-shrink:0;
}
.pdf-bookinfo{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:8px;
  min-width:0;
  flex:1;
}
.pdf-mini-cover{
  width:37px;height:49px;border-radius:3px;flex-shrink:0;
  transform:translateX(-15%);
  background:var(--terra) center/cover;
  box-shadow:0 6px 16px rgba(30,42,65,.18),inset 2px 0 0 rgba(0,0,0,.12);
}
.pdf-book-name{
  font-family:"Lemon Milk",sans-serif;
  font-size:.95rem;color:var(--ink);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  max-width:100%;
}
.pdf-book-pub{
  font-family:"Lemon Milk",sans-serif;
  font-size:.63rem;letter-spacing:.08em;text-transform:uppercase;
  color:rgba(79,74,69,.65);margin-top:2px;
}
.pdf-tools{display:flex;align-items:center;gap:4px;flex-shrink:0}
.pdf-order-btn{
  height:31px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 14px;
  border-radius:999px;
  background:rgba(155,123,92,.14);
  border:1px solid rgba(155,123,92,.30);
  color:rgba(31,28,25,.85);
  font-size:.72rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  text-decoration:none;
}
.pdf-order-btn:hover{background:rgba(155,123,92,.22);border-color:rgba(155,123,92,.45);color:var(--ink)}
.pdf-tool-btn{
  width:31px;height:31px;border-radius:7px;
  background:rgba(243,241,238,.9);
  border:1px solid rgba(0,0,0,.10);
  color:rgba(31,28,25,.62);font-size:.72rem;
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all .18s;
}
.pdf-tool-btn:hover{background:rgba(0,0,0,.06);color:var(--ink)}
.pdf-tool-btn.on{background:rgba(155,123,92,.18);border-color:rgba(155,123,92,.40);color:var(--ink)}
.pdf-tsep{width:1px;height:18px;background:rgba(30,42,65,.10);margin:0 3px}
.pdf-close-btn{
  width:31px;height:31px;border-radius:7px;
  background:rgba(243,241,238,.9);
  border:1px solid rgba(0,0,0,.10);
  color:rgba(31,28,25,.62);font-size:.78rem;
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all .18s;margin-left:4px;
}
.pdf-close-btn:hover{background:rgba(200,55,35,.14);border-color:rgba(200,55,35,.30);color:rgba(200,55,35,.95)}

.pdf-body{display:flex;flex:1;overflow:hidden;background:rgba(250,249,247,.96);min-height:0;position:relative}

.pdf-thumbs{
  width:0;overflow:hidden;flex-shrink:0;
  background:rgba(255,255,255,.78);
  border-right:1px solid rgba(30,42,65,.08);
  transition:width .32s var(--ease);
  display:flex;flex-direction:column;
  overflow-y:auto;
}
.pdf-thumbs.open{width:120px}
.pdf-thumbs::-webkit-scrollbar{width:3px}
.pdf-thumbs::-webkit-scrollbar-thumb{background:rgba(155,123,92,.35);border-radius:2px}
.pdf-thumb{padding:9px 8px 4px;cursor:pointer;transition:background .15s;border-bottom:1px solid rgba(30,42,65,.06)}
.pdf-thumb:hover{background:rgba(30,42,65,.04)}
.pdf-thumb.act{background:rgba(155,123,92,.14)}
.pdf-thumb-face{
  width:100%;aspect-ratio:3/4;
  background:#f5f3ef;border-radius:3px;overflow:hidden;
  position:relative;display:block;
  border:2px solid transparent;transition:border-color .15s;
}
.pdf-thumb-face > span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.pdf-thumb-media{position:absolute;inset:0}
.pdf-thumb-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;filter:saturate(.98) contrast(1.02)}
.pdf-thumb-chip{
  position:absolute;left:6px;bottom:6px;
  padding:3px 6px;border-radius:999px;
  font-family:"Lemon Milk",sans-serif;
  font-size:.55rem;letter-spacing:.06em;
  background:rgba(255,255,255,.85);
  border:1px solid rgba(30,42,65,.12);
  color:rgba(30,42,65,.75);
}
.pdf-thumb.act .pdf-thumb-face{border-color:var(--terra)}
.pdf-thumb-lbl{text-align:center;font-size:.51rem;letter-spacing:.04em;color:rgba(79,74,69,.55);margin-top:5px;padding-bottom:3px}

.pdf-canvas{
  flex:1;display:flex;align-items:center;justify-content:center;
  padding:40px;overflow:auto;position:relative;
}
.pdf-canvas::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 56% 54% at 50% 48%,rgba(155,123,92,.12) 0%,transparent 70%),
    radial-gradient(800px 520px at 18% 22%,rgba(0,0,0,.045),transparent 60%);
  pointer-events:none;
}

.book-3d{
  display:flex;align-items:stretch;
  filter:drop-shadow(0 34px 74px rgba(0,0,0,.28)) drop-shadow(0 10px 20px rgba(0,0,0,.18));
  transform-origin:center;
  transition:transform .26s var(--ease);
}
.bk-spine{
  width:24px;flex-shrink:0;
  background:linear-gradient(90deg,#060809,#0c1220,#18243a);
  border-radius:4px 0 0 4px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:inset 4px 0 12px rgba(0,0,0,.7);
  position:relative;overflow:hidden;
}
.bk-spine::before{
  content:'';position:absolute;left:6px;top:0;bottom:0;width:1px;
  background:linear-gradient(to bottom,transparent,rgba(255,255,255,.07) 30%,rgba(255,255,255,.07) 70%,transparent);
}
.bk-spine-txt{
  writing-mode:vertical-rl;transform:rotate(180deg);
  font-family:"Lemon Milk",sans-serif;
  font-size:.5rem;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(220,200,180,.26);
}
.bk-cover{
  width:294px;height:416px;flex-shrink:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:28px 22px;
  border-radius:0 7px 7px 0;
  position:relative;overflow:hidden;cursor:pointer;
  background:linear-gradient(150deg,#1e2a41 0%,#141e30 55%,#0d1622 100%);
  box-shadow:5px 0 0 #060809,7px 2px 22px rgba(0,0,0,.55);
  transition:filter .3s;
}
.bk-cover:hover{filter:brightness(1.08)}
.bk-cover::before{
  content:'';position:absolute;inset:10px;
  border:1px solid rgba(220,200,180,.1);
  border-radius:0 5px 5px 0;pointer-events:none;
}
.bk-cover::after{
  content:'';position:absolute;inset:0;
  background-image:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(255,255,255,.013) 2px,rgba(255,255,255,.013) 4px);
  pointer-events:none;
}
.bk-cover-img{
  width:158px;height:204px;object-fit:cover;border-radius:2px;
  margin-bottom:18px;
  box-shadow:0 10px 26px rgba(0,0,0,.6);
  border:2px solid rgba(255,255,255,.1);display:block;position:relative;z-index:1;
}
.bk-cover-img-ph{
  width:158px;height:204px;
  border:1px solid rgba(220,200,180,.12);border-radius:2px;
  margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;
  font-family:"Lemon Milk",sans-serif;
  font-size:.8rem;color:rgba(220,200,180,.22);text-align:center;padding:12px;
  position:relative;z-index:1;
}
.bk-cover-title{font-family:"Lemon Milk",sans-serif;font-size:1rem;color:rgba(255,255,255,.9);text-align:center;line-height:1.28;margin-bottom:5px;position:relative;z-index:1}
.bk-cover-author{font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:rgba(220,200,180,.38);position:relative;z-index:1}
.bk-cover-pub{font-size:.58rem;letter-spacing:.1em;color:rgba(255,255,255,.18);margin-top:5px;position:relative;z-index:1}
.bk-cover-cta{margin-top:16px;display:flex;align-items:center;gap:6px;font-family:"Lemon Milk",sans-serif;font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:rgba(220,200,180,.36);position:relative;z-index:1}

.bk-spread{display:flex;align-items:stretch}
.bk-page{
  width:294px;height:416px;flex-shrink:0;
  background:#fffef9;
  display:flex;flex-direction:column;overflow:hidden;position:relative;
}
.bk-page-img{width:100%;height:100%;object-fit:contain;display:block;background:#fffef9}
.bk-pg-img-ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:rgba(31,28,25,.25);font-size:.9rem}
.bk-page::before{
  content:'';position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:url(\"data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.78' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='400' height='400' filter='url(%23n)' opacity='.024'/%3E%3C/svg%3E\");
}
.bk-page.bk-left{border-radius:2px 0 0 2px;box-shadow:inset -8px 0 20px rgba(0,0,0,.12),-4px 6px 32px rgba(0,0,0,.52)}
.bk-page.bk-right{border-radius:0 2px 2px 2px;box-shadow:inset 6px 0 14px rgba(0,0,0,.06),4px 6px 28px rgba(0,0,0,.36)}
.bk-gutter{width:5px;flex-shrink:0;align-self:stretch;background:linear-gradient(90deg,rgba(0,0,0,.24),rgba(0,0,0,.44) 50%,rgba(0,0,0,.15));box-shadow:0 0 16px rgba(0,0,0,.35)}
.bk-pg-inner{padding:30px 26px 16px;flex:1;display:flex;flex-direction:column;overflow:hidden;position:relative;z-index:1}
.bk-pg-eyebrow{font-family:"Lemon Milk",sans-serif;font-size:.55rem;letter-spacing:.24em;text-transform:uppercase;color:#9a7a5a;margin-bottom:9px;padding-bottom:8px;border-bottom:1px solid rgba(154,122,90,.18)}
.bk-pg-head{font-family:"Lemon Milk",sans-serif;font-size:1.05rem;color:#1a2030;line-height:1.22;margin-bottom:13px}
.bk-pg-body{font-family:"Lemon Milk",sans-serif;font-size:.82rem;line-height:1.8;color:#3a2e26;flex:1;overflow:hidden}
.bk-pg-body p{margin-bottom:10px}
.bk-pg-body p:last-child{margin-bottom:0}
.bk-pg-num{font-family:"Lemon Milk",sans-serif;font-size:.57rem;letter-spacing:.16em;color:rgba(60,46,38,.28);text-align:center;margin-top:auto;padding-top:8px;border-top:1px solid rgba(60,46,38,.08);position:relative;z-index:1}

.flip-layer{
  position:absolute;
  width:294px;height:416px;
  background:#fffef9;
  transform-style:preserve-3d;
  z-index:20;pointer-events:none;border-radius:2px;
  box-shadow:0 4px 20px rgba(0,0,0,.28);
}
.flip-fwd{
  top:50%;left:50%;margin-top:-208px;margin-left:-147px;
  transform-origin:left center;
  animation:flipFwd .64s cubic-bezier(.645,.045,.355,1) forwards;
}
.flip-bk{
  top:50%;left:50%;margin-top:-208px;margin-left:-147px;
  transform-origin:right center;
  animation:flipBk .64s cubic-bezier(.645,.045,.355,1) forwards;
}
@keyframes flipFwd{from{transform:rotateY(0)}to{transform:rotateY(-180deg)}}
@keyframes flipBk {from{transform:rotateY(0)}to{transform:rotateY( 180deg)}}

.pdf-bottombar{
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 20px;
  background:rgba(255,255,255,.92);
  border-top:1px solid rgba(30,42,65,.08);
  gap:16px;flex-shrink:0;
}
.pdf-nav{display:flex;align-items:center;gap:8px}
.pdf-nav-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 16px;border-radius:40px;
  background:rgba(243,241,238,.9);
  border:1px solid rgba(30,42,65,.10);
  color:rgba(30,42,65,.68);
  font-family:"Lemon Milk",sans-serif;font-size:.72rem;
  cursor:pointer;transition:all .18s;
}
.pdf-nav-btn:hover:not(:disabled){background:rgba(30,42,65,.08);color:var(--ink)}
.pdf-nav-btn:disabled{opacity:.25;cursor:default}
.pdf-pg-info{font-family:"Lemon Milk",sans-serif;font-size:.72rem;color:rgba(79,74,69,.62);min-width:110px;text-align:center;letter-spacing:.04em}
.pdf-progress{flex:1;max-width:210px;height:3px;background:rgba(30,42,65,.10);border-radius:2px;overflow:hidden}
.pdf-progress-fill{height:100%;background:var(--terra);border-radius:2px;transition:width .42s var(--ease)}
.pdf-kbd{font-family:"Lemon Milk",sans-serif;font-size:.62rem;color:rgba(79,74,69,.55);white-space:nowrap}

/* Mobile / small screens: keep reader fully visible and scrollable */
@media (max-width:720px){
  .pdf-topbar{padding:12px 14px;flex-wrap:wrap}
  .pdf-bookinfo{flex:1 1 200px;min-width:0}
  .pdf-tools{flex:0 0 auto;flex-wrap:wrap;justify-content:flex-end}
  .pdf-bottombar{padding:10px 14px}

  .pdf-body{flex-direction:column}

  /* Thumbnails become a horizontal rail */
  .pdf-thumbs{
    width:100%;
    height:0;
    border-right:0;
    border-bottom:1px solid rgba(0,0,0,.08);
  }
  .pdf-thumbs.open{
    width:100%;
    height:112px;
    overflow-x:auto;
    overflow-y:hidden;
    flex-direction:row;
  }
  .pdf-thumb{
    min-width:92px;
    border-bottom:0;
    border-right:1px solid rgba(0,0,0,.06);
    flex:0 0 auto;
  }
  .pdf-thumb-lbl{font-size:.56rem}

  /* Canvas must scroll on mobile */
  .pdf-canvas{padding:16px 12px;overflow:auto}

  /* Reader layout: stack pages so nothing goes off-screen */
  .book-3d{
    flex-direction:column;
    align-items:center;
    gap:12px;
    filter:drop-shadow(0 24px 50px rgba(30,42,65,.18)) drop-shadow(0 8px 16px rgba(30,42,65,.16));
  }
  .bk-spine{display:none}
  .bk-gutter{display:none}
  .bk-spread{flex-direction:column;gap:12px}
  .bk-page,.bk-cover{width:min(88vw,380px);height:auto;aspect-ratio:3/4}
  .bk-page-img{width:100%;height:100%;object-fit:contain;background:#fffef9}
  .flip-layer{display:none}

  .pdf-nav-btn{padding:7px 12px}
  .pdf-pg-info{min-width:86px}
  .pdf-kbd{display:none}
}