.dvb-background {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  container-type: size;
}

.dvb-background__iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  width: max(100cqw, 177.778cqh);
  height: max(100cqh, 56.25cqw);
  min-width: 100%;
  min-height: 100%;
  border: 0;
  transform: translate(-50%, -50%);
  pointer-events: none;
}