body {
    background-image: url('bg.jpg');
    transform: translate3d(0%, 0px, 0px);
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    -webkit-background-size: cover;
    background-size: cover;
    background-position: center;
    /* filter: brightness(0.9); */
    box-shadow: inset 0 0 0 100vmax rgba(0, 0, 0, .3);
    zoom: normal !important;
}

.main-panel {
     background: none !important; 
   
}