discourse/app/assets/stylesheets/common/modal/user-status.scss

.user-status.modal {
  .modal-inner-container {
    box-sizing: border-box;
    min-width: 310px;
  }

  .modal-footer {
    margin: 0;
    border-top: 0;
    padding: 10px 0;

    .delete-status {
      margin-left: auto;
      margin-right: 0;
    }
  }

  .modal-body {
    width: 375px;
    box-sizing: border-box;

    @media (max-width: 600px) {
      width: 100%;
    }
  }
}