html, body {
    background-color: lightgray;
    margin:0px;
    overflow: hidden;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

#main {
    border: none;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 95vh;
    width: 100%;
}

#content {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

#img{
    max-width: 100%;
    max-height: 100%;
}