.iframe-box {
  position:relative;
  width:100%;
  height:0;
  overflow:hidden;
  padding-bottom: 56.25%;
}

.iframe-box iframe{
  position: absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
  border:0;
}

.pressure{
    text-align: center;
    color:#6F51A1;
    font-size: 1.4rem;
}