.anchor::before {
  content: '🔗';
  opacity: 0.15;
  display: inline-block;
  font-size: 20px;
  padding-right: 12px;
  margin-left: -12px
}

.anchor {
  color: #3c4858; 
  margin-left: -20px;
}

.anchor:hover {
  text-decoration: none;
  color: #3c4858;
}

h1:hover > .anchor::before,
h2:hover > .anchor::before,
h3:hover > .anchor::before,
h4:hover > .anchor::before,
h5:hover > .anchor::before,
h6:hover > .anchor::before {
  opacity: 1;
}