.anchor {
  anchor-name: --a;
  background: lightblue;
  margin: 150px 80px 0;
}
.element {
  position-anchor: --a;
  position: absolute;
  position-area: top;
}
body [class]:before {
  content: attr(class);
  font: bold 30px system-ui;
}
body [class] {
  border: 1px solid;
  padding: 10px;
  border-radius: 10px;
}
body {
  margin: 0;
  display: flex;
}