.zoom-window-floating {
  position: fixed;
  width: 380px;      /* passt sich später dynamisch an */
  height: 380px;
  border: 1px solid #ccc;
  background-repeat: no-repeat;
  background-color: #fff;
  box-shadow: 0 6px 18px rgba(0,0,0,0.15);
  z-index: 99999;
  pointer-events: none;
  display: none;
  will-change: background-position, background-size, left, top;
}

.thumb {
  max-width: 260px;
  width: 100%;
  cursor: crosshair;
}