html,
body {
    height: 100%;
    box-sizing: border-box;
    padding: 0px;
    margin: 0px;
    overflow: hidden;
    background: transparent;
}

.mainClient {
    width: 100%;
    height: 100%;
    /*background: #202020;*/
    background: transparent;
    border: 1px solid black;
    border-top: 0px;
    color: white;
    display: flex;
}

* {
    box-sizing: border-box;
}
#navbar {
    display: none;
    width: 20rem;
    /*background-color: #333;*/
    background: transparent;
    color: #fff;
    padding: 20px;
}

#content {
    width: 100%;
    background: transparent;
}

/* Style the navigation links */
#navbar ul {
    list-style-type: none;
    padding: 0;
}

#navbar li {
    margin-bottom: 10px;
}

#navbar a {
    text-decoration: none;
    color: #fff;
}

#content {
    width: 100%;
}

#content iframe {
    width: 100%;
    height: 100%;
    border: none;
    opacity: 0;
}