.guiVersion2 #credentialFieldDiv .label::before {
      content: 'Användarnamn (e-post)';
    }

.guiVersion2 #credentialFieldDiv .label span#credentialDescription,
.guiVersion2 #credentialFieldDiv .label span#userIdLabelEmail,
.guiVersion2 #credentialFieldDiv .label span#userIdLabel,
.guiVersion2 #credentialFieldDiv .label span#credentialDescriptionEmail {
          display: none;
        }

/* Keep the wrapper intact (borders live here), only hide text inside */
#heading {
  font-size: 0 !important;      /* makes the original text vanish */
  line-height: 0 !important;
  position: relative;
}

/* Inject new text */
#heading::after {
  content: "Aktivera ditt konto";
  font-size: 24px;              /* adjust to match original */
  font-weight: bold;
  line-height: normal;
  color: #000;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;          /* one row only */
}