html { 
   width:100%; 
   height:100%; 
   background: rgb(246,246,246);
   background: radial-gradient(circle, rgba(246,246,246,1) 0%, rgba(193,206,221,1) 100%);
}

img.logo {
   position: absolute;
   top: 50%;
   left: 50%;
   width: 50%;
   height: auto;
   margin-top: -10%; /* Half the height */
   margin-left: -25%; /* Half the width */
}

.offlineMSG {
    height: 100vh;
    width: 100vw;
    background: transparent;
    background-image: url(offline-message.png);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}