* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial;
    font-size: 17px;
    font-family: 'Humnst777 BT';
    background-color: black;
}

#qr {
    position: absolute;
    top: 100px;
    right: 100px;
    width: 400px;
    background-color: white;
    padding: 20px 20px 40px 20px;
    z-index: 0;
    font-size: 90px;
    font-weight: bold;
    text-align: center;
    letter-spacing: -0.05em;
    line-height: 0.8em;
}

    #qr img {
        display: block;
        width: 100%;
        height: auto;
    }

#myVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
    z-index: 0;
}

.content {
    position: fixed;
    bottom: 0;
    background: rgba(0, 0, 0, 0.0);
    color: #f1f1f1;
    width: 100%;
    padding: 20px;
}

#myBtn {
    width: 200px;
    font-size: 18px;
    padding: 10px;
    border: none;
    background: #000;
    color: #fff;
    cursor: pointer;
}

    #myBtn:hover {
        background: #ddd;
        color: black;
    }