/* Flipbook KORE — adaptado de kore-flipbook-2 para embedding no site */

/* ─── Scoped root + container ────────────────────────────────────── */
#kore-viewer {
  color-scheme: light;
  --ui-bg: rgba(250, 250, 249, 0.92);
  --ui-border: rgba(20, 20, 20, 0.12);
  --ink: #111111;
  --muted: #6b6b68;
  --canvas: #e7e6e2;
  --canvas-deep: #d5d3cd;
  --page-w: 430px;
  --page-h: 765px;
  --book-w: 860px;
  --book-h: 765px;
  --turn-time: 1100ms;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.16), 0 0 0 1px rgba(0,0,0,0.06);
  margin-top: 2.5rem;
}

#kore-viewer * { box-sizing: border-box; }
#kore-viewer button, #kore-viewer a { font: inherit; }
#kore-viewer button { color: inherit; }

.app {
  width: 100%;
  height: clamp(540px, 75vh, 840px);
  display: grid;
  grid-template-rows: 62px 1fr;
  background:
    radial-gradient(circle at 50% 44%, rgba(255,255,255,0.74), transparent 47%),
    linear-gradient(145deg, var(--canvas), var(--canvas-deep));
  position: relative;
  overflow: hidden;
}

.toolbar {
  position: relative;
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  min-width: 0;
  padding: 8px max(14px, env(safe-area-inset-right)) 8px max(14px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--ui-border);
  background: var(--ui-bg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  user-select: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1.25px solid currentColor;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 500;
}

.brand-name {
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.42em;
  white-space: nowrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.toolbar-navigation { justify-self: center; }
.toolbar-actions { justify-self: end; }

.icon-button {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, opacity 160ms ease, transform 160ms ease;
}

.icon-button:hover { background: rgba(0,0,0,0.055); }
.icon-button:active { transform: scale(0.95); }
.icon-button:focus-visible { outline: 2px solid #111; outline-offset: 2px; }
.icon-button:disabled { opacity: 0.28; cursor: default; transform: none; }
.icon-button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-button svg rect { fill: currentColor; stroke: none; }

.page-counter,
.zoom-value {
  min-width: 78px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.04em;
}
.zoom-value { min-width: 49px; color: var(--muted); }

.fullscreen-exit { display: none; }
#app:fullscreen .fullscreen-enter,
#app:-webkit-full-screen .fullscreen-enter { display: none; }
#app:fullscreen .fullscreen-exit,
#app:-webkit-full-screen .fullscreen-exit { display: block; }

.viewer {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  overscroll-behavior: contain;
}

.viewer-center {
  min-width: 100%;
  min-height: 100%;
  width: max-content;
  height: max-content;
  display: grid;
  place-items: center;
  padding: 30px;
}

.scale-wrapper { position: relative; flex: 0 0 auto; }

.book-shell {
  position: absolute;
  inset: 0 auto auto 0;
  width: var(--book-w);
  height: var(--book-h);
  transform-origin: 0 0;
  will-change: transform;
}

.desktop-book {
  position: relative;
  width: var(--book-w);
  height: var(--book-h);
  perspective: 2600px;
  -webkit-perspective: 2600px;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transform: translateX(0);
  -webkit-transform: translateX(0);
  transition: transform 540ms cubic-bezier(.4, 0, .2, 1);
  isolation: isolate;
}

.desktop-book.single-cover {
  transform: translateX(calc(var(--page-w) / -2));
  -webkit-transform: translateX(calc(var(--page-w) / -2));
}
.desktop-book.single-back {
  transform: translateX(calc(var(--page-w) / 2));
  -webkit-transform: translateX(calc(var(--page-w) / 2));
}
.desktop-book.single-cover .paper-underlay-left,
.desktop-book.single-back .paper-underlay-right { visibility: hidden; }
.desktop-book.single-cover .book-spine,
.desktop-book.single-back .book-spine { opacity: 0; }
.desktop-book.single-cover .page-zone-left,
.desktop-book.single-back .page-zone-right { pointer-events: none; }

.paper-underlay {
  position: absolute;
  top: 0;
  width: var(--page-w);
  height: var(--page-h);
  background: #f8f8f7;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.045);
}
.paper-underlay-left { left: 0; border-radius: 8px 2px 2px 8px; }
.paper-underlay-right { right: 0; border-radius: 2px 8px 8px 2px; }

.sheet {
  position: absolute;
  top: 0;
  left: 50%;
  width: var(--page-w);
  height: var(--page-h);
  transform-origin: left center;
  -webkit-transform-origin: left center;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transform: rotateY(0deg) translateZ(0);
  -webkit-transform: rotateY(0deg) translateZ(0);
  transition: transform var(--turn-time) cubic-bezier(.4, 0, .2, 1);
  will-change: transform;
}

.sheet.flipped {
  transform: rotateY(-180deg) translateZ(0);
  -webkit-transform: rotateY(-180deg) translateZ(0);
}
.sheet.turning { z-index: 115 !important; }
.sheet.turning .page-face { box-shadow: 0 18px 25px rgba(0,0,0,.24); }

.page-face {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #fff;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.04);
  transition: box-shadow var(--turn-time) ease;
}
.page-face.front {
  transform: rotateY(0deg) translateZ(.1px);
  -webkit-transform: rotateY(0deg) translateZ(.1px);
  border-radius: 1px 8px 8px 1px;
}
.page-face.back {
  transform: rotateY(180deg) translateZ(.1px);
  -webkit-transform: rotateY(180deg) translateZ(.1px);
  border-radius: 8px 1px 1px 8px;
}

.page-face img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

.page-face.front::after,
.page-face.back::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 300ms ease;
}
.page-face.front::after { background: linear-gradient(90deg, rgba(0,0,0,.14), transparent 9%, transparent 88%, rgba(0,0,0,.07)); }
.page-face.back::after  { background: linear-gradient(90deg, rgba(0,0,0,.08), transparent 12%, transparent 92%, rgba(0,0,0,.15)); }
.sheet.turning .page-face::after { opacity: 1; }

.book-spine {
  position: absolute;
  z-index: 110;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 26px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(0,0,0,.16) 46%, rgba(255,255,255,.18) 53%, transparent);
  opacity: .18;
  pointer-events: none;
  mix-blend-mode: multiply;
}

.page-zone {
  position: absolute;
  z-index: 120;
  top: 0;
  width: 50%;
  height: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.page-zone-left { left: 0; cursor: w-resize; }
.page-zone-right { right: 0; cursor: e-resize; }
.page-zone:focus-visible { outline: 2px solid rgba(0,0,0,.62); outline-offset: 5px; }

.mobile-book { display: none; }

.thumbnails {
  /* position: absolute so it stays within the flipbook container */
  position: absolute;
  z-index: 80;
  top: 78px;
  bottom: 18px;
  left: 18px;
  width: min(370px, calc(100% - 36px));
  display: grid;
  grid-template-rows: auto 1fr;
  border: 1px solid var(--ui-border);
  border-radius: 16px;
  background: rgba(250,250,249,.96);
  box-shadow: 0 22px 60px rgba(0,0,0,.21);
  backdrop-filter: blur(18px);
  transform: translateX(calc(-100% - 32px));
  opacity: 0;
  pointer-events: none;
  transition: transform 260ms cubic-bezier(.2,.8,.2,1), opacity 220ms ease;
}
.thumbnails.open { transform: translateX(0); opacity: 1; pointer-events: auto; }

.thumbnails-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 12px 9px 18px;
  border-bottom: 1px solid var(--ui-border);
  font-size: 13px;
  letter-spacing: .04em;
}

.thumbnail-grid {
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  overflow: auto;
  padding: 14px;
}

.thumbnail {
  position: relative;
  display: block;
  padding: 0;
  border: 1px solid rgba(0,0,0,.10);
  border-radius: 8px;
  overflow: hidden;
  background: white;
  cursor: pointer;
  box-shadow: 0 5px 14px rgba(0,0,0,.08);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}
.thumbnail:hover { transform: translateY(-2px); box-shadow: 0 9px 20px rgba(0,0,0,.13); }
.thumbnail.active { border-color: #111; box-shadow: 0 0 0 2px #111, 0 10px 22px rgba(0,0,0,.16); }
.thumbnail img { display: block; width: 100%; aspect-ratio: 1650 / 2934; object-fit: cover; }
.thumbnail span {
  position: absolute;
  right: 6px;
  bottom: 6px;
  min-width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  padding: 0 6px;
  border-radius: 999px;
  background: rgba(17,17,17,.84);
  color: white;
  font-size: 10px;
  font-weight: 700;
}

.scrim {
  /* position: absolute so it stays within the flipbook container */
  position: absolute;
  z-index: 70;
  inset: 62px 0 0;
  background: rgba(20,20,20,.18);
  backdrop-filter: blur(2px);
}

.loading {
  /* position: absolute so it stays within the flipbook container */
  position: absolute;
  z-index: 200;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: #ecebe8;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .06em;
  transition: opacity 280ms ease, visibility 280ms ease;
}
.loading.hidden { opacity: 0; visibility: hidden; }
.loading-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(0,0,0,.16);
  border-top-color: #111;
  border-radius: 50%;
  animation: kore-spin 720ms linear infinite;
}
@keyframes kore-spin { to { transform: rotate(360deg); } }

/* ── Fullscreen ── */
#app:fullscreen,
#app:-webkit-full-screen {
  height: 100vh;
}
#app:fullscreen .app,
#app:-webkit-full-screen .app {
  height: 100%;
}

@media (max-width: 760px) {
  .app { grid-template-rows: 56px 1fr; }
  .toolbar {
    grid-template-columns: auto 1fr auto;
    gap: 4px;
    padding: 6px 8px;
  }
  .brand-name, .zoom-value, #zoomOutButton, #zoomInButton { display: none; }
  .brand-mark { width: 32px; height: 32px; }
  .toolbar-group { gap: 1px; }
  .icon-button { width: 36px; height: 36px; border-radius: 9px; }
  .page-counter { min-width: 62px; font-size: 11px; }
  .viewer-center { padding: 16px; }
  .book-shell { width: var(--page-w); height: var(--page-h); }
  .desktop-book { display: none; }
  .mobile-book {
    position: relative;
    display: block;
    width: var(--page-w);
    height: var(--page-h);
    perspective: 2200px;
    filter: drop-shadow(0 20px 25px rgba(0,0,0,.18));
  }
  .mobile-stage {
    position: absolute;
    inset: 0;
    overflow: hidden;
    border-radius: 8px;
    background: #fff;
    transform-style: preserve-3d;
  }
  .mobile-page {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: white;
    user-select: none;
    -webkit-user-drag: none;
    backface-visibility: hidden;
    will-change: transform, opacity;
  }
  .mobile-under { z-index: 1; }
  .mobile-current { z-index: 2; }
  .mobile-page-shadow {
    position: absolute;
    z-index: 3;
    inset: 0;
    pointer-events: none;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,.06), inset 22px 0 30px -30px rgba(0,0,0,.24);
  }
  .mobile-current.turn-next {
    transform-origin: left center;
    animation: mobileTurnNext 650ms cubic-bezier(.2,.72,.18,1) both;
  }
  .mobile-current.turn-prev {
    transform-origin: right center;
    animation: mobileTurnPrev 650ms cubic-bezier(.2,.72,.18,1) both;
  }
  @keyframes mobileTurnNext {
    0% { transform: rotateY(0); filter: brightness(1); }
    68% { opacity: 1; }
    100% { transform: rotateY(-112deg); opacity: 0; filter: brightness(.77); }
  }
  @keyframes mobileTurnPrev {
    0% { transform: rotateY(0); filter: brightness(1); }
    68% { opacity: 1; }
    100% { transform: rotateY(112deg); opacity: 0; filter: brightness(.77); }
  }
  .thumbnails { top: 68px; bottom: 10px; left: 10px; width: calc(100% - 20px); }
  .scrim { inset: 56px 0 0; }
}

@media (max-width: 430px) {
  #fullscreenButton { display: none; }
  .toolbar-actions { gap: 0; }
  .thumbnail-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; padding: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  #kore-viewer *, #kore-viewer *::before, #kore-viewer *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}