.wp-block-custom-title-block a{
  display: block;
  color: inherit;
  text-decoration: none;
}

.wp-block-custom-title-block a:hover{
  text-decoration: underline;
}

.wp-block-custom-title-block .custom-title-block__title{
  margin: 0;
}

.wp-block-custom-title-block .custom-title-block__subtitle{
  margin-top: 0.5em;
  margin-bottom: 0;
}