.container1 {
position: relative;
width: 100%;
height: calc(1600px + (1300 – 1600) * ((100vw – 300px) / (2200 – 300)));
overflow: hidden;
/*padding-top: 100%;*/ /* 1:1 Aspect Ratio */
background-color: #f2f2f2;
}
.responsive-iframe {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
width: 100%;
height: 100%;
border: none;
background-color: #f2f2f2;
}
