body {
    margin: 0;
    padding: 0;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

div {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#viewport {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border: none;
    border-radius: 0;
}