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<!DOCTYPE html>
<html>
<head>
<style> 
#container {
  width: 200px;
  aspect-ratio: 2/3;
  border: 1px solid black;
  display: grid;
  position: relative;
}
#container > div {
  border: 1px solid black;
  padding: 10px;
  position: absolute;
}
.blue {
  background-color: lightblue;
  width: 50%;
}
.red {
  background-color: coral;
  width: 40%;
  top: 100px;
  justify-self: right;
}
.green {
  background-color: lightgreen;
  width: 60%;
  top: 200px;
}
</style>
</head>
<body>
<h2>justify-self: right, on positioned items</h2>