html,
body,
canvas,
.container {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    overflow: hidden;
}

.container {
    position: relative;
}

#overlay {
    position: absolute;
    top: 10px;
    right: 10px;
    color: white;
}

#overlay ul {
    list-style: none;
    padding: 0;
}