.background{
    position: fixed;
    z-index: 999999;
    background-color: #000000 ;
    width: 100%;
    height: 100%;
}
.vertical-center {
    background-color: black;
    margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  }
  .custom-loader {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: 
      radial-gradient(farthest-side,#F4F4F4 94%,#0000) top/8px 8px no-repeat,
      conic-gradient(#0000 30%,#F4F4F4);
    -webkit-mask: radial-gradient(farthest-side,#0000 calc(100% - 8px),#000 0);
    animation:s3 1s infinite linear;
  }
  
  @keyframes s3{ 
    100%{transform: rotate(1turn)}
  }