Sith/subscription/static/subscription/css/subscription.scss

#subscription-form form {
  .form-content.existing-user {
    max-height: 100%;
    display: flex;
    flex: 1 1 auto;
    flex-direction: row;

    @media screen and (max-width: 700px) {
      flex-direction: column-reverse;
    }

    /* Make the form fields take exactly the space they need,
     * then display the user profile right in the middle of the remaining space. */
    fieldset {
      flex: 0 1 auto;
    }

    #subscription-form-user-mini-profile {
      display: flex;
      flex: 1 1 auto;
      justify-content: center;
    }

    .user_mini_profile {
      height: 300px;
    }
  }
}