ckground: lightblue;
}

.middle {
  inline-size: 100%;
  block-size: 39800px;
  background: green;
}

.bottom {
  inline-size: 100%;
  block-size: 100px;
  background: blue;
}
</style>
<body>
<div class="target target_at_bottom_edge">
  <div class="top">This text is at the top of the box</div>
  <div class="middle">This text is in the middle of the box</div>
  <div id="scrollblue" class="bottom">This text is at the bottom of the box</div>
</div>
</body>
