#disciple-flipbook-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;  
  background: var(--color-charcoal); 
  flex-direction: column;
}

#disciple-flipbook-overlay.open {
  display: flex;
}

#flipbook-close-btn {
  position: absolute;
  top: 16px;
  right: 20px;
  z-index: 100000;  
  background: var(--color-vellum);
  color: var(--color-russet);
  border: 1px solid var(--color-russet);
  padding: 10px 18px;
  font-family: var(--font-family-sans-serif); /* Archivo */
  font-weight: bold;
  text-transform: uppercase;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s ease;
}

#flipbook-close-btn:hover {
  background: var(--color-russet);
  color: var(--color-vellum);
}

#flipbook-target {
  width: 100%;
  height: 100vh;
  filter: drop-shadow(0 20px 50px rgba(0,0,0,0.5));
}