<!DOCTYPE html>
<html>
<head>
<style>
.grid {
  display: grid;
  padding: 13px;
  padding-bottom: 42px;
  border: 23px solid black;
  border-bottom-width: 45px;
  width: 100px;
  height: 100px;
  align-items: self-end;
}
.item {
  width: 50px;
  height: 50px;
  background-color: green;
}
</style>
</head>
<body>
<div class="grid">
  <div class="item"></div>
</div>
</body>
</html>
