discourse/app/assets/stylesheets/common/base/activation.scss

// Styles used before the user is logged into discourse. For example, activating their
// account or changing their email.

.account-created-page,
.activate-account-page {
  background: var(--secondary);

  #main-outlet {
    padding: 0;
    height: 100%;
  }
  .above-main-container-outlet {
    display: none;
  }
}

.activate-account-page .alert-error {
  margin: 1em;
}

.account-created,
.activate-account {
  max-width: 500px;
  padding: 2rem 3rem;
  background: var(--secondary);
  margin: 10vh auto 1em auto;
  @media screen and (max-height: 700px) {
    margin: 1em auto 1em auto;
  }
}

.account-created {
  .ac-message {
    font-size: var(--font-up-1);
    line-height: var(--line-height-large);
  }
  .activation-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em;
    margin-top: 1em;
  }

  .edit-cancel {
    text-transform: capitalize;
  }

  .success-info p:last-child {
    margin-bottom: 0;
  }
}

.activate-account {
  .activate-account-button,
  .continue-button {
    margin-top: 1em;
    margin-inline: auto;
    display: block;
    width: fit-content;
  }

  .login-welcome-header {
    margin-inline: auto;
    width: fit-content;
  }

  .tada-image {
    width: 150px;
    margin: auto;
    padding-bottom: 1em;
  }
}