.position-center {
  position: absolute!important;
  /* top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  margin: auto; */
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
  opacity: 1.0;
}

.about-links li {
  cursor: pointer;
}

.about-links a {
  height: 30px;
  display: inline-block;
  opacity: 0.7;
  transition: 0.1s opacity;
}

.about-links img {
  width: 25px;
}

.about-links a:hover {
  opacity: 1.0;
}