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<!DOCTYPE html>
<html>
<head>
<style>
#container {
  position: relative;
  width: 60%;
  aspect-ratio: 2/3;
  margin: auto;
  border: solid black 2px;
}
#topDiv {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 25px;
  z-index: 1;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
}
#imgDiv {
  position: absolute;
  inset: 0 0 0 0;
  padding-top: 40px;
  overflow-x: hidden;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scroll-padding-top: 30px;
}
      
#imgDiv > img {
  width: 95%;
  margin: 2px;
  scroll-snap-align: start none;
}
</style>
</head>
<body>