#projects-div {
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

a {
  color: #1a1a1a;
  text-decoration: none;
  background-color: transparent;
}

a:hover {
  color: black;
  text-decoration: underline;
  opacity: 1;
}

#headoverlay {
  color: white;
  opacity: 0;
  position: absolute;
  display: block;
  transition: .5s ease;
  text-shadow: 0 3px 20px #000000;
}

a:hover #headoverlay {
  opacity: 1;
}