.vtx-viewport2 {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--vtx-viewport2-bg, #111);
  user-select: none;
}
/* ── image stage ── */
.vtx-viewport2-stage {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  overflow: hidden;
}
.vtx-viewport2-stage.vtx-viewport2-dragging { cursor: grabbing; }
.vtx-viewport2-img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  transform-origin: 0 0;
  pointer-events: none;
  transition: opacity .25s ease;
}
.vtx-viewport2-img.vtx-viewport2-hidden { opacity: 0; }
/* ── loading / error overlays ── */
.vtx-viewport2-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--vtx-viewport2-overlay-bg, rgba(17,17,17,.85));
  color: #fff;
  font-family: inherit;
  font-size: 13px;
  gap: 12px;
  z-index: 10;
  transition: opacity .3s ease;
  pointer-events: none;
}
.vtx-viewport2-overlay.vtx-viewport2-hidden { opacity: 0; }
.vtx-viewport2-spinner {
  width: 28px; height: 28px;
  border: 3px solid rgba(255,255,255,.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: vtx-viewport2-spin .7s linear infinite;
}
@keyframes vtx-viewport2-spin { to { transform: rotate(360deg); } }
.vtx-viewport2-error-banner {
  position: absolute;
  bottom: 12px; left: 50%;
  transform: translateX(-50%);
  background: #c62828;
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 12px;
  font-family: inherit;
  z-index: 20;
  max-width: 80%;
  text-align: center;
}
/* ── nav arrows (multi-image mode) ── */
.vtx-viewport2-nav {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  z-index: 15;
  background: rgba(0,0,0,.45);
  color: #fff;
  border: none; border-radius: 50%;
  width: 36px; height: 36px;
  font-size: 18px; line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s, opacity .15s;
  opacity: 0;
}
.vtx-viewport2:hover .vtx-viewport2-nav { opacity: 1; }
.vtx-viewport2-nav:hover { background: rgba(0,0,0,.7); }
.vtx-viewport2-nav.vtx-viewport2-hidden { display: none; }
.vtx-viewport2-prev { left: 10px; }
.vtx-viewport2-next { right: 10px; }
/* ── index dots (multi-image mode) ── */
.vtx-viewport2-dots {
  position: absolute;
  bottom: 10px; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 6px;
  z-index: 15;
  opacity: 0; transition: opacity .15s;
}
.vtx-viewport2:hover .vtx-viewport2-dots { opacity: 1; }
.vtx-viewport2-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: rgba(255,255,255,.4);
  cursor: pointer;
  transition: background .15s, transform .15s;
}
.vtx-viewport2-dot.vtx-viewport2-active { background: #fff; transform: scale(1.25); }
/* ── zoom controls ── */
.vtx-viewport2-zoom-controls {
  position: absolute;
  top: 10px; right: 10px;
  display: flex; flex-direction: column; gap: 4px;
  z-index: 15;
  opacity: 0; transition: opacity .15s;
}
.vtx-viewport2:hover .vtx-viewport2-zoom-controls { opacity: 1; }
.vtx-viewport2-zoom-btn {
  width: 28px; height: 28px;
  background: rgba(0,0,0,.45);
  color: #fff;
  border: none; border-radius: 4px;
  font-size: 16px; line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.vtx-viewport2-zoom-btn:hover { background: rgba(0,0,0,.7); }