/* Minimal shell styles. Your pasted HTML controls the inner design. */
.spb-overlay{
  position: fixed;
  inset: 0;
  z-index: 999999;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(0,0,0,0.70);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.spb-modal{
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
/* Ensure images inside your popup don't inherit theme limits unless your HTML sets them */
.spb-modal img{
  height: auto;
}