:root {
  --bg: #0e0c0a;
  --panel: #17130f;
  --paper: #f8f4ec;
  --text: #f7f1e8;
  --muted: #b8aca0;
  --accent: #a52d22;
  --gold: #d2ae72;
  --ease-smooth: cubic-bezier(.18,.82,.2,1);
  --ease-return: cubic-bezier(.4,0,.22,1);
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
html, body { width: 100%; min-height: 100%; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -15%, #4a3d31 0, #211a15 32%, #0f0c0a 72%),
    var(--bg);
}
button { font: inherit; }
.site-header {
  position: fixed;
  z-index: 60;
  top: max(14px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  width: auto;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn, .close-product {
  border: 1px solid rgba(255,255,255,.15);
  color: #fff;
  background: rgba(255,255,255,.07);
  backdrop-filter: blur(12px);
  cursor: pointer;
  transition: background .2s ease, transform .2s ease, opacity .2s ease;
}
.icon-btn { width: 46px; height: 46px; border-radius: 50%; font-size: 25px; }
.icon-btn:hover, .close-product:hover { background: rgba(255,255,255,.14); }
.icon-btn:active, .close-product:active { transform: scale(.96); }
.icon-btn:disabled { opacity: .28; cursor: default; }
.page-counter { min-width: 96px; text-align: center; color: var(--muted); font-size: 12px; letter-spacing: .08em; }
.catalog-shell { width: 100%; min-height: 100vh; min-height: 100dvh; margin: 0; }
.catalog-stage {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  border: 0;
  border-radius: 0;
  padding: clamp(70px, 8vh, 94px) clamp(16px, 3vw, 48px) clamp(18px, 3vh, 34px);
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 16%, rgba(255,230,193,.09), transparent 32%),
    radial-gradient(circle at 12% 14%, rgba(189,106,63,.07), transparent 34%),
    linear-gradient(145deg, #29221d, #15110e 54%, #0d0b09);
  box-shadow: inset 0 1px rgba(255,255,255,.04);
  isolation: isolate;
  perspective: 2200px;
}
.catalog-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(255,255,255,.025), transparent 26%, transparent 72%, rgba(255,255,255,.018));
}
.ambient { position: absolute; border-radius: 50%; filter: blur(36px); opacity: .15; pointer-events: none; transition: opacity .5s ease, transform .7s var(--ease-smooth); }
.ambient-a { width: 34%; aspect-ratio: 1; left: -8%; top: 10%; background: #b1432e; }
.ambient-b { width: 28%; aspect-ratio: 1; right: -5%; bottom: 5%; background: #b28a4a; }
.catalog-stage.product-active .ambient { opacity: .25; transform: scale(1.08); }
.floor-shadow { position: absolute; left: 10%; right: 10%; bottom: 2.5%; height: 7%; background: radial-gradient(ellipse, rgba(0,0,0,.64), transparent 72%); filter: blur(18px); pointer-events: none; }
.book {
  position: relative;
  z-index: 3;
  width: min(calc(100vw - 56px), calc((100vh - 118px) * 1.414));
  width: min(calc(100vw - 56px), calc((100dvh - 118px) * 1.414));
  max-width: 1540px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  transform-style: preserve-3d;
  transition: filter .46s ease, transform .58s var(--ease-smooth), opacity .35s ease;
  touch-action: pan-y;
  user-select: none;
}
.book.is-dimmed { filter: blur(2.3px) saturate(.72) brightness(.58); transform: scale(.982) translateZ(-38px); }
.book.is-page-turning, .mobile-page-wrap.is-page-turning { pointer-events: none !important; }
.page {
  position: relative;
  overflow: hidden;
  aspect-ratio: .707 / 1;
  background: var(--paper);
  box-shadow: 0 30px 65px rgba(0,0,0,.32);
}
.page img { width: 100%; height: 100%; display: block; object-fit: cover; pointer-events: none; }
.page-left { border-radius: 17px 3px 3px 17px; }
.page-right { border-radius: 3px 17px 17px 3px; }
.page-left::after, .page-right::before { content: ""; position: absolute; top: 0; bottom: 0; width: 7%; pointer-events: none; }
.page-left::after { right: 0; background: linear-gradient(90deg, transparent, rgba(53,39,28,.22)); }
.page-right::before { left: 0; background: linear-gradient(90deg, rgba(53,39,28,.22), transparent); }
.book-gutter { position: absolute; z-index: 8; left: 50%; top: 1.5%; bottom: 1.5%; width: 22px; transform: translateX(-50%); background: linear-gradient(90deg, transparent, rgba(60,42,29,.18), rgba(27,20,15,.26), rgba(255,255,255,.16), transparent); filter: blur(1.1px); pointer-events: none; }
.hotspot-layer { position: absolute; z-index: 9; inset: 0; pointer-events: none; }
.hotspot-layer:not(.has-interactions) { pointer-events: none !important; }
.hotspot {
  position: absolute;
  border: 0;
  padding: 0;
  background: transparent;
  border-radius: 12px;
  cursor: pointer;
  pointer-events: auto;
  outline: none;
}
.hotspot::before {
  content: "";
  position: absolute;
  inset: 8%;
  border-radius: 12px;
  border: 1px solid rgba(213,177,114,0);
  background: radial-gradient(circle, rgba(213,177,114,0), transparent 72%);
  transform: scale(.88);
  transition: border-color .24s ease, background .24s ease, transform .3s var(--ease-smooth), box-shadow .3s ease;
}
@media (hover:hover) and (pointer:fine) {
  .hotspot:hover::before { border-color: rgba(213,177,114,.48); background: radial-gradient(circle, rgba(213,177,114,.08), transparent 72%); transform: scale(1); box-shadow: 0 0 0 1px rgba(255,255,255,.04), inset 0 0 28px rgba(213,177,114,.05); }
}
.hotspot:focus-visible::before { border-color: #fff; box-shadow: 0 0 0 3px rgba(165,45,34,.5); }
.hotspot.is-source::before { border-color: rgba(213,177,114,.58); background: radial-gradient(circle, rgba(213,177,114,.12), transparent 72%); transform: scale(1.04); }
.focus-aura {
  position: absolute;
  z-index: 20;
  left: 50%; top: 46%;
  width: min(44vw, 560px); aspect-ratio: 1;
  transform: translate(-50%,-50%) scale(.56);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,239,213,.20), rgba(226,180,108,.09) 36%, rgba(155,66,42,.035) 58%, transparent 72%);
  filter: blur(4px);
  opacity: 0;
  transition: opacity .22s ease, transform .34s var(--ease-smooth);
  pointer-events: none;
}
.focus-shadow {
  position: absolute;
  z-index: 21;
  left: 50%; top: 72%;
  width: 300px; height: 58px;
  transform: translate(-50%,-50%) scale(.52);
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0,0,0,.72), rgba(0,0,0,.24) 43%, transparent 72%);
  filter: blur(13px);
  opacity: 0;
  transition: opacity .22s ease, transform .34s var(--ease-smooth);
  pointer-events: none;
}
.catalog-stage.product-active .focus-aura { opacity: 1; transform: translate(-50%,-50%) scale(1); }
.catalog-stage.product-active .focus-shadow { opacity: 1; transform: translate(-50%,-50%) scale(1); }
.product-focus { position: absolute; z-index: 25; inset: 0; pointer-events: none; }
.product-object {
  position: absolute;
  left: 50%; top: 50%;
  width: clamp(128px, 13vw, 176px);
  aspect-ratio: .64 / 1;
  transform: translate(-50%,-50%) scale(.42) translateZ(0);
  transform-style: preserve-3d;
  opacity: 0;
  filter: drop-shadow(0 38px 30px rgba(0,0,0,.56));
  will-change: left, top, transform, opacity;
}
.product-object.is-launching { transition: left .29s var(--ease-smooth), top .29s var(--ease-smooth), transform .32s var(--ease-smooth), opacity .08s ease; }
.product-object.is-returning { transition: left .17s var(--ease-return), top .17s var(--ease-return), transform .19s var(--ease-return), opacity .06s ease .12s; }
.product-pack { position: absolute; inset: 0; transform-style: preserve-3d; will-change: transform; }
.product-pack.spin-in { transition: transform .32s cubic-bezier(.14,.88,.18,1); }
.product-pack.spin-out { transition: transform .19s var(--ease-return); }
.pack-face { position: absolute; inset: 0; backface-visibility: hidden; border-radius: 7% 7% 11% 11%; overflow: hidden; background: #24201c; }
.pack-face img { width: 100%; height: 100%; display: block; object-fit: contain; }
.pack-front { transform: translateZ(13px); }
.pack-back { transform: rotateY(180deg) translateZ(13px); }
.pack-side { position: absolute; top: 2%; bottom: 2%; width: 26px; left: calc(50% - 13px); border-radius: 8px; background: linear-gradient(90deg, var(--side-dark, #4c3326), var(--side-light, #8e6148)); opacity: .92; }
.pack-side-left { transform: rotateY(-90deg) translateZ(78px); }
.pack-side-right { transform: rotateY(90deg) translateZ(78px); }
.pack-highlight { position: absolute; z-index: 6; top: -34%; bottom: -34%; left: -70%; width: 48%; transform: skewX(-17deg); background: linear-gradient(90deg, transparent, rgba(255,255,255,.34), transparent); opacity: 0; pointer-events: none; }
.catalog-stage.product-active .pack-highlight { animation: packSheen .82s .08s ease forwards; }
@keyframes packSheen { 0% { left: -70%; opacity: 0; } 16% { opacity: .78; } 100% { left: 125%; opacity: 0; } }
.product-info {
  position: absolute;
  z-index: 30;
  left: 50%; bottom: 6.5%;
  max-width: calc(100% - 32px);
  transform: translateX(-50%) translateY(14px);
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 11px 16px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px;
  color: #30271f;
  background: rgba(250,246,238,.94);
  box-shadow: 0 16px 38px rgba(0,0,0,.26);
  backdrop-filter: blur(16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease .10s, transform .22s var(--ease-smooth) .10s;
}
.catalog-stage.product-active .product-info { opacity: 1; transform: translateX(-50%) translateY(0); }
.product-info strong { display: block; font-family: Georgia, "Times New Roman", serif; font-size: 16px; color: #2d251f; line-height: 1.05; }
.product-info span { color: #786a5f; font-size: 10px; }
.product-series { margin: 0 0 2px; color: var(--accent); font-size: 8px; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.product-meta { display: flex; align-items: center; gap: 7px; white-space: nowrap; }
.product-meta .dot { color: #b89969; }
.close-product {
  position: absolute;
  z-index: 35;
  top: 16px; right: 16px;
  width: 46px; height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 22px;
  opacity: 0;
  pointer-events: none;
}
.catalog-stage.product-active .close-product { opacity: 1; pointer-events: auto; }

/* --------------------------------------------------------------------------
   V7 fiziksel kitap geometrisi / gerçek sayfa dönüşü
   -------------------------------------------------------------------------- */

/*
  Book masaüstünde her zaman iki fiziksel sayfa genişliğindedir.
  Tek kapakta grid küçültülmez. Yalnızca görünmeyen yarı gizlenir ve bütün
  kitap yarım sayfa kadar kaydırılarak görünen kapak ekranda merkezlenir.
  Bu sayede page-01 -> 02/03 geçişinde ölçü sıçraması olmaz.
*/
.book {
  width: min(calc(100vw - 56px), calc((100dvh - 118px) * 1.414));
  max-width: 1540px;
  grid-template-columns: 1fr 1fr;
}

.book.is-spread-view {
  transform: translateX(0);
}

.book.is-cover-view,
.book.is-back-view {
  transform: translateX(-25%);
}

.book.is-cover-view .page-left,
.book.is-back-view .page-left,
.book.is-cover-view .book-gutter,
.book.is-back-view .book-gutter {
  visibility: hidden;
  pointer-events: none;
}

.book.is-cover-view .page-right,
.book.is-back-view .page-right {
  visibility: visible;
}

/* İlk kapak açılırken book'un sabit geometrisi merkez spread konumuna kayar. */
.book.is-cover-opening {
  transform: translateX(0);
  transition:
    transform 1.10s cubic-bezier(.42,.02,.18,1),
    filter .46s ease,
    opacity .35s ease;
}
.book.is-cover-opening .page-left,
.book.is-cover-opening .page-right {
  visibility: visible;
}
.book.is-cover-opening .book-gutter {
  visibility: visible;
  opacity: 1;
}

/* İlk spread'den kapağa geri kapanış. */
.book.is-cover-closing {
  transform: translateX(-25%);
  transition:
    transform 1.10s cubic-bezier(.42,.02,.18,1),
    filter .46s ease,
    opacity .35s ease;
}
.book.is-cover-closing .page-left,
.book.is-cover-closing .page-right {
  visibility: visible;
}

/* Son spread -> tek arka kapak yerleşimi. */
.book.is-back-settling {
  animation: backCoverSettle .42s cubic-bezier(.18,.82,.2,1);
}
@keyframes backCoverSettle {
  from { transform: translateX(0); }
  to   { transform: translateX(-25%); }
}

/*
  Flip sheet stage üzerinde gerçek sayfa boyutunda kalır.
  İç sayfalarda sadece rotateY vardır.
*/
.flip-sheet {
  position: absolute;
  z-index: 16;
  display: none;
  pointer-events: none;
  perspective: 2800px;
  perspective-origin: 50% 50%;
  transform-style: preserve-3d;
  overflow: visible;
}
.flip-sheet.turn-next,
.flip-sheet.turn-prev,
.flip-sheet.turn-cover-open,
.flip-sheet.turn-cover-close {
  display: block;
}

.flip-paper {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  will-change: transform;
}

.flip-sheet.turn-next .flip-paper {
  transform-origin: 0% 50%;
  animation: realPageTurnNext .98s cubic-bezier(.46,.02,.20,1) forwards;
}
.flip-sheet.turn-prev .flip-paper {
  transform-origin: 100% 50%;
  animation: realPageTurnPrev .98s cubic-bezier(.46,.02,.20,1) forwards;
}

/*
  ÖN KAPAK:
  Wrapper sadece yatay olarak gerçek spine konumuna kayar.
  Dikey hareket / translateY / rotateX yoktur.
*/
.flip-sheet.turn-cover-open {
  animation: coverSheetMoveOpen 1.10s cubic-bezier(.42,.02,.18,1) forwards;
}
.flip-sheet.turn-cover-open .flip-paper {
  transform-origin: 0% 50%;
  animation: coverPageRotateOpen 1.10s cubic-bezier(.42,.02,.18,1) forwards;
}
.flip-sheet.turn-cover-close {
  animation: coverSheetMoveClose 1.10s cubic-bezier(.42,.02,.18,1) forwards;
}
.flip-sheet.turn-cover-close .flip-paper {
  transform-origin: 100% 50%;
  animation: coverPageRotateClose 1.10s cubic-bezier(.42,.02,.18,1) forwards;
}

.flip-face {
  position: absolute;
  inset: 0;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--paper);
  transform-style: preserve-3d;
}
.flip-face img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.flip-front { transform: rotateY(0deg) translateZ(.7px); }
.flip-back  { transform: rotateY(180deg) translateZ(.7px); }

.flip-face-light {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
}

/* İç sayfa + kapakta aynı doğal yüzey gölgelendirmesi */
.flip-sheet.turn-next .flip-front .flip-face-light,
.flip-sheet.turn-cover-open .flip-front .flip-face-light {
  background: linear-gradient(
    90deg,
    rgba(0,0,0,.02) 0%,
    rgba(0,0,0,.015) 44%,
    rgba(64,42,28,.18) 79%,
    rgba(20,13,9,.46) 100%
  );
  animation: pageFrontShade .98s ease-in-out forwards;
}
.flip-sheet.turn-next .flip-back .flip-face-light,
.flip-sheet.turn-cover-open .flip-back .flip-face-light {
  background: linear-gradient(
    90deg,
    rgba(25,16,10,.47) 0%,
    rgba(67,44,29,.17) 28%,
    rgba(255,255,255,.045) 73%,
    rgba(255,255,255,.02) 100%
  );
  animation: pageBackShade .98s ease-in-out forwards;
}
.flip-sheet.turn-prev .flip-front .flip-face-light,
.flip-sheet.turn-cover-close .flip-front .flip-face-light {
  background: linear-gradient(
    270deg,
    rgba(0,0,0,.02) 0%,
    rgba(0,0,0,.015) 44%,
    rgba(64,42,28,.18) 79%,
    rgba(20,13,9,.46) 100%
  );
  animation: pageFrontShade .98s ease-in-out forwards;
}
.flip-sheet.turn-prev .flip-back .flip-face-light,
.flip-sheet.turn-cover-close .flip-back .flip-face-light {
  background: linear-gradient(
    270deg,
    rgba(25,16,10,.47) 0%,
    rgba(67,44,29,.17) 28%,
    rgba(255,255,255,.045) 73%,
    rgba(255,255,255,.02) 100%
  );
  animation: pageBackShade .98s ease-in-out forwards;
}

/* Kenar kıvrımı: yalnızca dış kenarda, sayfa merkezi hareket etmez. */
.flip-fold-edge {
  position: absolute;
  z-index: 8;
  top: 0;
  bottom: 0;
  width: 16px;
  opacity: 0;
  pointer-events: none;
}
.flip-sheet.turn-next .flip-fold-edge,
.flip-sheet.turn-cover-open .flip-fold-edge {
  right: -2px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255,255,255,.54) 35%,
    rgba(118,82,57,.25) 67%,
    rgba(30,19,13,.24)
  );
  animation: realFoldEdge .98s ease-in-out forwards;
}
.flip-sheet.turn-prev .flip-fold-edge,
.flip-sheet.turn-cover-close .flip-fold-edge {
  left: -2px;
  background: linear-gradient(
    270deg,
    transparent,
    rgba(255,255,255,.54) 35%,
    rgba(118,82,57,.25) 67%,
    rgba(30,19,13,.24)
  );
  animation: realFoldEdge .98s ease-in-out forwards;
}

.flip-cast-shadow {
  position: absolute;
  z-index: -1;
  top: 1.5%;
  bottom: 1.5%;
  width: 28%;
  opacity: 0;
  pointer-events: none;
  filter: blur(16px);
}
.flip-sheet.turn-next .flip-cast-shadow,
.flip-sheet.turn-cover-open .flip-cast-shadow {
  left: -3%;
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(0,0,0,.58), rgba(0,0,0,.15), transparent);
  animation: realPageShadow .98s ease-in-out forwards;
}
.flip-sheet.turn-prev .flip-cast-shadow,
.flip-sheet.turn-cover-close .flip-cast-shadow {
  right: -3%;
  transform-origin: right center;
  background: linear-gradient(270deg, rgba(0,0,0,.58), rgba(0,0,0,.15), transparent);
  animation: realPageShadow .98s ease-in-out forwards;
}

@keyframes realPageTurnNext {
  0%   { transform: rotateY(0deg); }
  16%  { transform: rotateY(-18deg); }
  38%  { transform: rotateY(-64deg); }
  50%  { transform: rotateY(-90deg); }
  66%  { transform: rotateY(-124deg); }
  88%  { transform: rotateY(-166deg); }
  100% { transform: rotateY(-180deg); }
}
@keyframes realPageTurnPrev {
  0%   { transform: rotateY(0deg); }
  16%  { transform: rotateY(18deg); }
  38%  { transform: rotateY(64deg); }
  50%  { transform: rotateY(90deg); }
  66%  { transform: rotateY(124deg); }
  88%  { transform: rotateY(166deg); }
  100% { transform: rotateY(180deg); }
}

/*
  Kapak açılırken spine yatay olarak merkez konumuna ilerler.
  Yukarı/aşağı hareket kesinlikle yoktur.
*/
@keyframes coverSheetMoveOpen {
  from { transform: translateX(0); }
  to   { transform: translateX(var(--cover-shift-x, 0px)); }
}
@keyframes coverPageRotateOpen {
  0%   { transform: rotateY(0deg); }
  18%  { transform: rotateY(-18deg); }
  45%  { transform: rotateY(-76deg); }
  58%  { transform: rotateY(-104deg); }
  82%  { transform: rotateY(-162deg); }
  100% { transform: rotateY(-180deg); }
}
@keyframes coverSheetMoveClose {
  from { transform: translateX(0); }
  to   { transform: translateX(var(--cover-shift-x, 0px)); }
}
@keyframes coverPageRotateClose {
  0%   { transform: rotateY(0deg); }
  18%  { transform: rotateY(18deg); }
  45%  { transform: rotateY(76deg); }
  58%  { transform: rotateY(104deg); }
  82%  { transform: rotateY(162deg); }
  100% { transform: rotateY(180deg); }
}

@keyframes pageFrontShade {
  0%   { opacity: .02; }
  28%  { opacity: .18; }
  50%  { opacity: .68; }
  64%  { opacity: .39; }
  100% { opacity: 0; }
}
@keyframes pageBackShade {
  0%, 35% { opacity: .02; }
  50%     { opacity: .68; }
  70%     { opacity: .24; }
  100%    { opacity: .02; }
}
@keyframes realFoldEdge {
  0%, 6% { opacity: 0; transform: scaleX(.35); }
  32%    { opacity: .48; transform: scaleX(.78); }
  50%    { opacity: .88; transform: scaleX(1.20); }
  72%    { opacity: .43; transform: scaleX(.72); }
  100%   { opacity: 0; transform: scaleX(.30); }
}
@keyframes realPageShadow {
  0%   { opacity: 0; transform: scaleX(.15); }
  28%  { opacity: .28; transform: scaleX(.62); }
  50%  { opacity: .74; transform: scaleX(1.48); }
  72%  { opacity: .25; transform: scaleX(.55); }
  100% { opacity: 0; transform: scaleX(.12); }
}

.mobile-page-wrap { position: relative; z-index: 3; width: min(calc(100vw - 24px), calc((100vh - 88px) * .707)); width: min(calc(100vw - 24px), calc((100dvh - 88px) * .707)); max-width: 680px; margin: 0 auto; aspect-ratio: .707 / 1; touch-action: pan-y; user-select: none; transition: filter .42s ease, transform .55s var(--ease-smooth); }
.mobile-page-wrap.is-dimmed { filter: blur(1.8px) saturate(.75) brightness(.58); transform: scale(.985); }
.mobile-page { width: 100%; height: 100%; display: block; object-fit: cover; border-radius: 16px; box-shadow: 0 25px 55px rgba(0,0,0,.34); }
.mobile-hotspots { inset: 0; }
@media (max-width: 760px), (max-width: 980px) and (orientation: portrait) {
  body { overflow: hidden; }
  .site-header { top: max(10px, env(safe-area-inset-top)); align-items: center; }
  .catalog-shell { width: 100%; }
  .eyebrow { font-size: 9px; }
  h1 { font-size: 25px; }
  .page-counter { min-width: 70px; }
  .catalog-stage { min-height: 100vh; min-height: 100dvh; padding: 64px 12px 14px; border-radius: 0; }
  .book { display: none; }
  .mobile-page-wrap[hidden] { display: none; }
  .mobile-page-wrap:not([hidden]) { display: block; }
  .product-object { width: min(34vw, 172px); max-height: 54dvh; }
  .focus-aura { width: 92vw; max-width: 430px; }
  .focus-shadow { top: 69%; width: 230px; }
  .product-info { bottom: 4%; gap: 10px; border-radius: 18px; padding: 10px 12px; flex-wrap: wrap; justify-content: center; text-align: center; }
  .product-meta { width: 100%; justify-content: center; }
  .close-product { top: 10px; right: 10px; }
}
@media (max-width: 430px) {
  .site-header { gap: 10px; }
  .icon-btn { width: 42px; height: 42px; }
  .page-counter { min-width: 56px; font-size: 11px; }
  h1 { font-size: 22px; }
}

@media (max-height: 620px) and (orientation: landscape) {
  .site-header { top: 8px; }
  .icon-btn { width: 40px; height: 40px; }
  .catalog-stage { padding-top: 54px; padding-bottom: 10px; }
  .book {
    width: min(calc(100vw - 36px), calc((100dvh - 68px) * 1.414));
  }
  .product-info { bottom: 2.5%; }
  .focus-shadow { top: 76%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}


/* Kapak ve arka kapakta sadece tek fiziksel sayfa görünür. */
.book.is-cover-view .page-right::before,
.book.is-back-view .page-right::before {
  display: none;
}


@media (max-width: 760px), (max-width: 980px) and (orientation: portrait) {
  .book.is-cover-view,
  .book.is-spread-view,
  .book.is-back-view,
  .book.is-cover-opening,
  .book.is-cover-closing {
    transform: none !important;
  }
}


/* --------------------------------------------------------------------------
   V8 - içerik görünürlük zamanlaması
   Yeni sayfa DOM'a tıklama anında basılmaz. JS sayfa görsellerini gerçek
   dönüş açısına denk gelen zamanlarda değiştirir. Aşağıdaki gölgeleme,
   ilk 15-20°'de alttaki sayfanın neredeyse görünmemesini; 90°'den sonra
   arka yüzün daha okunur olmasını destekler.
   -------------------------------------------------------------------------- */
.flip-sheet.turn-next .flip-front::after,
.flip-sheet.turn-cover-open .flip-front::after,
.flip-sheet.turn-prev .flip-front::after,
.flip-sheet.turn-cover-close .flip-front::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: rgba(22, 14, 9, 0);
  animation: physicalPageOcclusion .98s cubic-bezier(.46,.02,.20,1) forwards;
}

@keyframes physicalPageOcclusion {
  0%   { background: rgba(22,14,9,0); }
  18%  { background: rgba(22,14,9,.015); }
  42%  { background: rgba(22,14,9,.12); }
  50%  { background: rgba(22,14,9,.20); }
  68%  { background: rgba(22,14,9,.07); }
  100% { background: rgba(22,14,9,0); }
}

/* Sayfa dönüşü sırasında kullanıcı hedef sayfadaki ürünlere erişemez. */
.catalog-stage.is-page-turning .hotspot-layer,
.catalog-stage.is-page-turning .hotspot {
  pointer-events: none !important;
}

/* Gelen görselin doğal olarak net görünmesi için page img üzerinde ayrıca
   fade/opacity animasyonu kullanılmaz; görünürlük yalnızca fiziksel açıyla belirlenir. */
.page img,
.mobile-page {
  opacity: 1;
}


/* V9 - hızlı ürün değişimi sırasında odak katmanı sabit kalır. */
.catalog-stage.product-active .focus-aura,
.catalog-stage.product-active .focus-shadow {
  will-change: transform, opacity;
}


/* ========================================================================== 
   V10 - eKatalog-style professional reader shell
   Reference-inspired reader UI; Akıncılar 3D product layer remains independent.
   ========================================================================== */
html { color-scheme: dark; }
body {
  background: #242424;
}
.site-header { display: none !important; }
.catalog-stage.reader-stage {
  padding: 28px 70px 76px;
  background:
    radial-gradient(ellipse at 50% 46%, rgba(255,255,255,.055), transparent 46%),
    linear-gradient(#292929, #202020 72%, #1b1b1b);
  perspective: 2800px;
}
.reader-backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0,0,0,.16), transparent 8%, transparent 92%, rgba(0,0,0,.16)),
    linear-gradient(180deg, rgba(255,255,255,.025), transparent 20%, transparent 84%, rgba(0,0,0,.15));
}
.ambient, .floor-shadow { opacity: 0 !important; }
.book {
  max-width: 1460px;
  filter: drop-shadow(0 22px 34px rgba(0,0,0,.42));
  transition: transform .36s cubic-bezier(.2,.72,.2,1), filter .24s ease, opacity .2s ease;
}
.book.is-cover-view { transform: translateX(-25%); }
.book.is-spread-view { transform: translateX(0); }
.book.is-back-view { transform: translateX(25%); }
.book.is-back-view .page-right,
.book.is-back-view .book-gutter { visibility: hidden; pointer-events:none; }
.book.is-back-view .page-left { visibility: visible; }
.book.is-cover-view .page-left,
.book.is-cover-view .book-gutter { visibility: hidden; pointer-events:none; }
.book.is-cover-view .page-right { visibility: visible; }
.book.is-cover-opening { transform: translateX(0); transition: transform .82s cubic-bezier(.32,.04,.16,1); }
.book.is-cover-closing { transform: translateX(-25%); transition: transform .82s cubic-bezier(.32,.04,.16,1); }
.book.is-back-opening { transform: translateX(0); transition: transform .82s cubic-bezier(.32,.04,.16,1); }
.book.is-cover-opening .page-left,
.book.is-cover-opening .page-right,
.book.is-cover-closing .page-left,
.book.is-cover-closing .page-right,
.book.is-back-opening .page-left,
.book.is-back-opening .page-right { visibility: visible; }
.page {
  border-radius: 0;
  box-shadow: 0 2px 5px rgba(0,0,0,.36), 0 22px 42px rgba(0,0,0,.22);
}
.page-left { border-radius: 4px 0 0 4px; }
.page-right { border-radius: 0 4px 4px 0; }
.page-left::after { width: 10%; background: linear-gradient(90deg, transparent, rgba(31,23,18,.19)); }
.page-right::before { width: 10%; background: linear-gradient(90deg, rgba(31,23,18,.20), transparent); }
.book-gutter {
  width: 18px;
  background: linear-gradient(90deg, transparent, rgba(28,20,15,.22), rgba(0,0,0,.25), rgba(255,255,255,.11), transparent);
}

/* Edge navigation ears */
.page-ear {
  position: absolute;
  z-index: 32;
  top: 50%;
  width: 42px;
  height: 82px;
  transform: translateY(-50%);
  border: 1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.78);
  background: rgba(16,16,16,.48);
  backdrop-filter: blur(7px);
  cursor: pointer;
  transition: width .18s ease, background .18s ease, opacity .18s ease;
}
.page-ear:hover { width: 48px; background: rgba(12,12,12,.72); color:#fff; }
.page-ear:disabled { opacity: .18; pointer-events:none; }
.page-ear span { font-size: 34px; font-weight: 200; line-height: 1; }
.page-ear-left { left: 8px; border-radius: 0 5px 5px 0; }
.page-ear-right { right: 8px; border-radius: 5px 0 0 5px; }

/* Bottom reader toolbar */
.reader-toolbar {
  position: fixed;
  z-index: 80;
  left: 50%;
  bottom: max(10px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  min-height: 48px;
  max-width: calc(100vw - 20px);
  padding: 5px 8px;
  display: flex;
  align-items: center;
  gap: 7px;
  border: 1px solid rgba(255,255,255,.105);
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(58,58,58,.96), rgba(31,31,31,.97));
  box-shadow: 0 8px 24px rgba(0,0,0,.35), inset 0 1px rgba(255,255,255,.08);
  backdrop-filter: blur(12px);
}
.toolbar-group { display:flex; align-items:center; gap:2px; }
.toolbar-separator { width:1px; height:26px; background:rgba(255,255,255,.12); margin:0 3px; }
.reader-tool, .reader-mini-btn {
  display:grid;
  place-items:center;
  min-width: 34px;
  height: 34px;
  padding: 0 8px;
  border: 0;
  border-radius: 3px;
  color: #d8d8d8;
  background: transparent;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  transition: background .15s ease, color .15s ease, opacity .15s ease;
}
.reader-tool:hover, .reader-mini-btn:hover { color:#fff; background:rgba(255,255,255,.10); }
.reader-tool.is-active { color:#fff; background:rgba(255,255,255,.09); }
.reader-tool:disabled { opacity:.25; cursor:default; background:transparent; }
.reader-page-counter {
  min-width: 94px;
  height: 30px;
  padding: 0 10px;
  display:flex;
  align-items:center;
  justify-content:center;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 3px;
  color:#ddd;
  background:rgba(0,0,0,.19);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.zoom-label { min-width:42px; text-align:center; color:#bdbdbd; font-size:11px; font-variant-numeric:tabular-nums; }

/* Thumbnail drawer */
.thumb-drawer {
  position: fixed;
  z-index: 75;
  top: 0;
  bottom: 0;
  left: 0;
  width: min(310px, 82vw);
  padding: 16px 12px 72px;
  background: rgba(27,27,27,.97);
  box-shadow: 14px 0 34px rgba(0,0,0,.34);
  transform: translateX(-102%);
  transition: transform .28s cubic-bezier(.2,.72,.2,1);
  backdrop-filter: blur(12px);
}
.thumb-drawer.is-open { transform: translateX(0); }
.thumb-drawer-head { height:38px; display:flex; align-items:center; justify-content:space-between; padding:0 4px 10px; color:#ddd; font-size:13px; }
.thumb-grid { height:calc(100% - 38px); overflow:auto; display:grid; grid-template-columns:repeat(2,1fr); gap:10px; padding:4px; }
.thumb-item { border:1px solid rgba(255,255,255,.08); border-radius:3px; padding:5px; background:#202020; color:#aaa; cursor:pointer; font-size:11px; transition:border-color .15s, background .15s; }
.thumb-item:hover { border-color:rgba(255,255,255,.28); background:#292929; }
.thumb-item.is-current { border-color:rgba(255,255,255,.66); color:#fff; }
.thumb-image-wrap { display:block; aspect-ratio:.707/1; overflow:hidden; margin-bottom:5px; background:#f4f0e8; }
.thumb-image-wrap img { width:100%; height:100%; object-fit:cover; display:block; }

/* Realistic page plane: no vertical lift, no center pop. */
.flip-sheet { perspective: 3000px; }
.flip-sheet.turn-next .flip-paper {
  transform-origin: 0% 50%;
  animation: ekPageNext .76s cubic-bezier(.34,.04,.16,1) forwards;
}
.flip-sheet.turn-prev .flip-paper {
  transform-origin: 100% 50%;
  animation: ekPagePrev .76s cubic-bezier(.34,.04,.16,1) forwards;
}
.flip-sheet.turn-cover-open { animation: coverWrapperOpen .82s cubic-bezier(.32,.04,.16,1) forwards; }
.flip-sheet.turn-cover-open .flip-paper { transform-origin:0% 50%; animation:ekCoverOpen .82s cubic-bezier(.32,.04,.16,1) forwards; }
.flip-sheet.turn-cover-close { animation: coverWrapperClose .82s cubic-bezier(.32,.04,.16,1) forwards; }
.flip-sheet.turn-cover-close .flip-paper { transform-origin:100% 50%; animation:ekCoverClose .82s cubic-bezier(.32,.04,.16,1) forwards; }
.flip-sheet.turn-back-open { animation: backWrapperOpen .82s cubic-bezier(.32,.04,.16,1) forwards; }
.flip-sheet.turn-back-open .flip-paper { transform-origin:100% 50%; animation:ekBackOpen .82s cubic-bezier(.32,.04,.16,1) forwards; }

@keyframes ekPageNext {
  0% { transform:rotateY(0deg); }
  18% { transform:rotateY(-20deg); }
  42% { transform:rotateY(-70deg); }
  50% { transform:rotateY(-90deg); }
  68% { transform:rotateY(-129deg); }
  88% { transform:rotateY(-166deg); }
  100% { transform:rotateY(-180deg); }
}
@keyframes ekPagePrev {
  0% { transform:rotateY(0deg); }
  18% { transform:rotateY(20deg); }
  42% { transform:rotateY(70deg); }
  50% { transform:rotateY(90deg); }
  68% { transform:rotateY(129deg); }
  88% { transform:rotateY(166deg); }
  100% { transform:rotateY(180deg); }
}
@keyframes coverWrapperOpen { from{transform:translateX(0)} to{transform:translateX(var(--cover-shift-x,0px))} }
@keyframes coverWrapperClose { from{transform:translateX(0)} to{transform:translateX(var(--cover-shift-x,0px))} }
@keyframes backWrapperOpen { from{transform:translateX(0)} to{transform:translateX(var(--back-shift-x,0px))} }
@keyframes ekCoverOpen { from{transform:rotateY(0)} to{transform:rotateY(-180deg)} }
@keyframes ekCoverClose { from{transform:rotateY(0)} to{transform:rotateY(180deg)} }
@keyframes ekBackOpen { from{transform:rotateY(0)} to{transform:rotateY(180deg)} }

.flip-sheet.turn-next .flip-fold-edge,
.flip-sheet.turn-cover-open .flip-fold-edge { right:-2px; left:auto; animation:ekFold .76s ease-in-out forwards; }
.flip-sheet.turn-prev .flip-fold-edge,
.flip-sheet.turn-cover-close .flip-fold-edge,
.flip-sheet.turn-back-open .flip-fold-edge { left:-2px; right:auto; animation:ekFold .76s ease-in-out forwards; }
@keyframes ekFold { 0%,100%{opacity:0;transform:scaleX(.25)} 42%,58%{opacity:.85;transform:scaleX(1.1)} }
.flip-cast-shadow { filter:blur(13px); }
.flip-sheet.turn-next .flip-cast-shadow,
.flip-sheet.turn-cover-open .flip-cast-shadow { left:-2%; right:auto; animation:ekCast .76s ease-in-out forwards; }
.flip-sheet.turn-prev .flip-cast-shadow,
.flip-sheet.turn-cover-close .flip-cast-shadow,
.flip-sheet.turn-back-open .flip-cast-shadow { right:-2%; left:auto; animation:ekCast .76s ease-in-out forwards; }
@keyframes ekCast { 0%,100%{opacity:0;transform:scaleX(.12)} 48%,52%{opacity:.72;transform:scaleX(1.35)} }
.flip-face-light { mix-blend-mode:multiply; }

/* Product overlay remains visually above the reader toolbar. */
.product-focus, .focus-aura, .focus-shadow { z-index: 90; }
.product-info, .close-product { z-index: 95; }

@media (max-width: 980px) {
  .catalog-stage.reader-stage { padding: 18px 44px 72px; }
  .page-ear { width:34px; height:70px; }
  .reader-toolbar { overflow-x:auto; justify-content:flex-start; }
  .toolbar-separator { display:none; }
}
@media (max-width: 760px), (max-width: 980px) and (orientation: portrait) {
  .catalog-stage.reader-stage { padding: 14px 12px 68px; }
  .page-ear { width:32px; height:64px; background:rgba(10,10,10,.42); }
  .page-ear-left { left:0; }
  .page-ear-right { right:0; }
  .reader-toolbar { bottom:max(6px,env(safe-area-inset-bottom)); min-height:44px; padding:4px 5px; gap:2px; border-radius:5px; }
  .reader-tool { min-width:31px; height:32px; padding:0 6px; }
  .reader-page-counter { min-width:76px; padding:0 7px; }
  .zoom-label, #firstBtn, #lastBtn { display:none; }
  .thumb-drawer { padding-bottom:62px; }
}


/* ==========================================================================
   V13 - LIVE SITE SAFE FIXES
   ========================================================================== */

/* PNG'nin şeffaf alanları gerçek anlamda transparan kalır. */
.pack-face,
.pack-front,
.pack-back,
.pack-face img,
.product-focus,
.product-object {
  background: transparent !important;
}

/* Katalog ürün açılırken karartılmaz / blur yapılmaz. */
.book.is-dimmed,
.book.is-spread-view.is-dimmed,
.book.is-cover-view.is-dimmed,
.book.is-back-view.is-dimmed,
.mobile-page-wrap.is-dimmed {
  filter: none !important;
  opacity: 1 !important;
}

/* Mevcut fiziksel book konumu korunur. */
.book.is-spread-view.is-dimmed { transform: translateX(0) !important; }
.book.is-cover-view.is-dimmed { transform: translateX(-25%) !important; }
.book.is-back-view.is-dimmed { transform: translateX(25%) !important; }
.mobile-page-wrap.is-dimmed { transform: none !important; }

/* Ürün arkasına yapay siyah/renkli sahne boyama. */
.focus-aura,
.focus-shadow,
.catalog-stage.product-active .focus-aura,
.catalog-stage.product-active .focus-shadow {
  opacity: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  filter: none !important;
}

/* Transparan PNG çevresindeki ağır siyah halo azaltıldı. */
.product-object {
  filter: drop-shadow(0 24px 20px rgba(0,0,0,.30)) !important;
}

/* Flip sırasında tüm reader navigation görsel olarak pasifleşir.
   JS zaten state değişimini kilitler; bu ek görsel geri bildirimdir. */
.catalog-stage.is-page-turning .reader-tool,
.catalog-stage.is-page-turning .page-ear,
.catalog-stage.is-page-turning .thumb-item {
  cursor: default;
}

/* Büyük thumbnail PNG'leri lazy-load edilirken boş alan düzgün görünür. */
.thumb-image-wrap {
  background:
    linear-gradient(110deg, #ece7de 28%, #f7f3eb 42%, #ece7de 56%);
  background-size: 220% 100%;
}

/* Fullscreen sadece reader stage'e uygulanır. */
.catalog-stage:fullscreen {
  width: 100vw;
  height: 100vh;
  min-height: 100vh;
}


/* ==========================================================================
   V15 - PRODUCT VISIBILITY GUARANTEE
   Ürün PNG'si hiçbir durumda global opacity:0 ile gizlenmez.
   ========================================================================== */
.pack-face img,
.pack-front img,
.pack-back img {
  opacity: 1 !important;
  visibility: visible !important;
  background: transparent !important;
}

.product-pack,
.product-object,
.product-focus,
.pack-face,
.pack-front,
.pack-back {
  background: transparent !important;
}