#main{
  height:100vh;
}

body {
  min-height: 100vh;
  min-height: -webkit-fill-available;
}

html {
  height: -webkit-fill-available;
}

[style*="--aspect-ratio"] > :first-child {
  width: 100%;
}
[style*="--aspect-ratio"] > img {  
  height: auto;
} 
@supports (--custom:property) {
  [style*="--aspect-ratio"] {
    position: relative;
  }
  [style*="--aspect-ratio"]::before {
    content: "";
    display: block;
    padding-bottom: calc(100% / (var(--aspect-ratio)));
  }  
  [style*="--aspect-ratio"] > :first-child {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
  }  
}