body,html{
    margin: 0px;
    padding: 0px;
    /*background-color: #333333;*/
    position: relative;
    width: 100%;
    height: 100%;
}

#previsualizador{
    margin-left: 0px;
    margin-right: 0px;
    margin-top: 0px;
    /*border:rgba(255,255,0,1) solid 1px;*/
}