.wp-block-group-events-one-button-registration {
  margin-bottom: 20px;
}

@media (max-width: 640px) {
  .wp-block-group-events-one-button-registration .gev-one-button-block-trigger {
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    width: 100% !important;
    max-width: none !important;
  }
}