/* Lightbox — fullscreen image viewer, global for all case study pages */
.lb-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  cursor: zoom-out;
}
.lb-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.lb-overlay img {
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 0 80px rgba(0,0,0,0.5);
  cursor: default;
  user-select: none;
  -webkit-user-select: none;
}
.lb-close {
  position: fixed;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  z-index: 10001;
  background: rgba(255,255,255,0.08);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, background 0.15s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.lb-close.visible {
  opacity: 1;
  pointer-events: auto;
}
.lb-close:hover { background: rgba(255,255,255,0.18); }
.lb-close svg { width: 20px; height: 20px; stroke: #fff; stroke-width: 2; }