/* Scoped under .flipbook-stage so site chrome (nav/footer) is unaffected */
.flipbook-stage {
  --fb-gold: #e7c877;
  --fb-gold-dim: #8a6a20;
  --fb-ink: #1b1e24;
  --fb-paper: #f6f2e9;

  background: radial-gradient(ellipse at 50% 30%, #2b2f37 0%, #14161b 65%, #0b0c0f 100%);
  color: #e8e8e8;
  font-family: Verdana, Geneva, sans-serif;
  min-height: min(92vh, 920px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 16px 40px;
  gap: 18px;
  overflow-x: hidden;
}

.flipbook-stage:fullscreen,
.flipbook-stage:-webkit-full-screen {
  min-height: 100vh;
  width: 100%;
}

.flipbook-stage .brandbar {
  text-align: center;
  margin-bottom: 4px;
}
.flipbook-stage .brandbar h2 {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 20px;
  letter-spacing: 4px;
  font-weight: normal;
  color: var(--fb-gold);
  margin: 0 0 4px;
}
.flipbook-stage .brandbar p {
  margin: 0;
  font-size: 12px;
  color: #8b909a;
  letter-spacing: 1px;
}

.flipbook-stage .toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(231,200,119,0.25);
  padding: 8px 14px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.flipbook-stage .toolbar button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(231,200,119,0.35);
  background: rgba(255,255,255,0.03);
  color: var(--fb-gold);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
}
.flipbook-stage .toolbar button:hover { background: rgba(231,200,119,0.18); }
.flipbook-stage .toolbar button:active { transform: scale(0.92); }
.flipbook-stage .toolbar button:disabled { opacity: 0.3; cursor: default; }
.flipbook-stage .toolbar button.off { color: #6b7078; border-color: rgba(255,255,255,0.15); }

.flipbook-stage #pageIndicator {
  min-width: 64px;
  text-align: center;
  font-size: 13px;
  color: #cfd3da;
  letter-spacing: 0.5px;
}

.flipbook-stage .divider { width: 1px; height: 22px; background: rgba(255,255,255,0.15); }

.flipbook-stage .book-wrap {
  position: relative;
  perspective: 2400px;
  width: min(94vw, 900px);
  min-height: 340px;
}

.flipbook-stage .book-shadow {
  position: relative;
  width: 100%;
  min-height: 340px;
  filter: drop-shadow(0 30px 40px rgba(0,0,0,0.55));
}

.flipbook-stage .book-shadow::after {
  content: "";
  position: absolute;
  left: 6%;
  right: 6%;
  bottom: -22px;
  height: 26px;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0) 72%);
  filter: blur(4px);
  pointer-events: none;
}

.flipbook-stage #book {
  width: 100%;
  margin: 0 auto;
  background: transparent;
}

.flipbook-stage #book canvas,
.flipbook-stage #book > div {
  border-radius: 3px;
}

.flipbook-stage .loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: rgba(15,16,20,0.94);
  border-radius: 3px;
  transition: opacity 0.3s;
  z-index: 5;
}
.flipbook-stage .loading-overlay.hidden { opacity: 0; pointer-events: none; }

.flipbook-stage .spinner {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 3px solid rgba(231,200,119,0.25);
  border-top-color: var(--fb-gold);
  animation: flipbook-spin 0.9s linear infinite;
}
@keyframes flipbook-spin { to { transform: rotate(360deg); } }

.flipbook-stage .loading-label {
  font-size: 12px;
  color: #cfd3da;
  letter-spacing: 0.5px;
}
.flipbook-stage .loading-track {
  width: 160px;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  overflow: hidden;
}
.flipbook-stage .loading-bar {
  height: 100%;
  width: 0%;
  background: var(--fb-gold);
  transition: width 0.2s;
}

.flipbook-stage .hint {
  font-size: 12px;
  color: #6f7580;
  letter-spacing: 0.5px;
  text-align: center;
  transition: opacity 0.4s;
  margin: 0;
}
.flipbook-stage .hint.hidden { opacity: 0; }

@media (max-width: 560px) {
  .flipbook-stage { padding: 20px 12px 32px; min-height: min(88vh, 780px); }
  .flipbook-stage .toolbar { gap: 6px; padding: 6px 10px; }
  .flipbook-stage .toolbar button { width: 32px; height: 32px; font-size: 14px; }
  .flipbook-stage .brandbar h2 { font-size: 16px; letter-spacing: 2px; }
}