/* Shared specialty pages: back-to-top + gallery lightbox */
#btt {
  position: fixed;
  bottom: 88px;
  right: 18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(77, 163, 255, 0.35);
  background: rgba(6, 12, 22, 0.96);
  color: #4da3ff;
  font-size: 20px;
  cursor: pointer;
  z-index: 985;
  display: none;
  align-items: center;
  justify-content: center;
  transition: opacity 0.25s, transform 0.25s, background 0.2s;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
#btt.btt-on { display: flex; }
#btt:hover {
  background: #4da3ff;
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}
@media (max-width: 640px) {
  #btt { bottom: 132px; right: 14px; }
}

.cd1-gallery-zoom {
  cursor: zoom-in;
}
.cd1-gallery-zoom:focus-visible {
  outline: 2px solid #4da3ff;
  outline-offset: 2px;
}

.cd1-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(2, 4, 10, 0.92);
  backdrop-filter: blur(6px);
}
.cd1-lightbox.open { display: flex; }
.cd1-lightbox img {
  max-width: min(96vw, 1400px);
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
}
.cd1-lightbox-close {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
}
.cd1-lightbox-close:hover { background: rgba(255, 255, 255, 0.16); }