* {
    -webkit-border-radius: 0 !important;
       -moz-border-radius: 0 !important;
            border-radius: 0 !important;
  }


.background-image {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      /* background: url('https://mdbootstrap.com/img/new/slides/126.jpg') no-repeat center center/cover; */
      background: url('https://i0.wp.com/picjumbo.com/wp-content/uploads/black-dunes-smartphone-wallpaper-free-photo.jpeg?w=2210&quality=70') no-repeat center center/cover;
  }
  .overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
  }
  .overlay-text {
      color: #fff;
      text-align: center;
  }