.wp-block-onlionit-schwarzer-button .black-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  background-color: #fff;
  color: #000;
  text-decoration: none;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
      border: 2px solid #000;
}

.wp-block-onlionit-schwarzer-button .black-button:hover,
.wp-block-onlionit-schwarzer-button .black-button:focus {
  background-color: #fff;
  color: #000;
}

.wp-block-onlionit-schwarzer-button .black-button__text {
  font-weight: 600;
  letter-spacing: 0.02em;
  color:#000;
}