@import "style.css";
main {
  flex: 1 1 600px;
}
#sidebar {
  display: flex;
  flex-direction: column;
  margin-top: 120px;
}
#sidebar,
body::after {
  position: sticky;
  max-width: 250px;
  height: 100vh;
  content: "";
  flex: 1 1 0%;
}