keycloak-theme/common/resources/scss/button.scss

.ps-button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  line-height: 1.2rem;
  border: 2px solid var(--foreground);
  border-radius: 1.5rem;
  background-color: var(--background-alt-2); 
  cursor: pointer;

  &:hover,
  &:focus {
    border-color: var(--accent);
  }
}