.source-list article > a {
  box-sizing: border-box;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--paper-300);
  border-radius: 6px;
  background: transparent;
  color: var(--brass-dark);
  text-decoration: none;
}

.source-list article > a:hover,
.source-list article > a:focus-visible {
  border-color: var(--brass);
  background: var(--paper-200);
}

@media (max-width: 850px) {
  .source-list article > a {
    display: none;
  }
}