@-ms-viewport { width:device-width; }
@media only screen and (min-device-width:800px) { html { overflow:hidden; } }
html { height:100%; background-color:#ffffff; }
body { height:100%; overflow:hidden; margin:0; padding:0; font-family:Arial, Helvetica, sans-serif; font-size:16px; color:#FFFFFF; background-color:#ffffff; }
.back{ position: absolute; left:0;top:0; z-index: 999999999;padding: 15px; opacity: 0.2 ; background: rgba(0, 0, 0, 0.42);}
.back:hover{opacity: 1;}
/* unvisited link */
a:link,
a:visited,
a:hover,
a:active {
    color: #FFF;
}

.box-update{
    width: 80%;
    margin: 10% auto;
    text-align: center;
    display: none;
}