/* Lightbox overlay */
.iv-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 24px;
}

/* open state */
.iv-overlay.iv-open { display: flex; }

/* image */
.iv-img {
  max-width: min(96vw, 1400px);
  max-height: 86vh;
  width: auto;
  height: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
  user-select: none;
  -webkit-user-drag: none;
}

/* controls */
.iv-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: rgba(255,255,255,.12);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 22px;
  line-height: 44px;
}

.iv-btn:hover { background: rgba(255,255,255,.2); }

.iv-prev { left: 18px; }
.iv-next { right: 18px; }

.iv-close {
  top: 18px;
  right: 18px;
  transform: none;
  font-size: 20px;
}

.iv-counter {
  position: absolute;
  left: 18px;
  top: 18px;
  color: rgba(255,255,255,.85);
  font: 14px/1.2 system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: rgba(0,0,0,.25);
  padding: 6px 10px;
  border-radius: 999px;
}

/* clickable hint */
.iv-clickable {
  cursor: zoom-in;
}