styles.css

.randnotiz {
  border-top: solid 0.5rem #888;
}

.wichtig {
  border-color: #b51f1f;
}

.wichtig::before {
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  content: "\f06a";
  position: absolute;
  height: 1rem;
  top: -0.5rem;
}

/* Desktop */
@media screen and (min-width: 1550px) {
.randnotiz {
  position: absolute;
  right: -200px;
  width: 250px;
}
}