.g-dialog-wrapper {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    display: flex;
    flex-direction: column;
    width: 405px;
    background-color: #ffffff;
    height: 226px;
    -webkit-box-shadow:  0 0 2em #5191f1;
    -moz-box-shadow:  0 0 2em #5191f1;
    box-shadow:  0 0 2em #5191f1;
    border-radius: 3px;
    z-index: 9999;
  }

transform: translate(-50%, -50%);

width: 404px;
height: 226px;