.responsive-calendar {
  position: relative;
  width: 100%;
  overflow: hidden;
  height: 70vh;
  padding-top: 75%; /* Aspect ratio – adjust as needed */
}

.responsive-calendar iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 70vh;
  border: 0;
}