html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
    color: #fff;
    font-family: Arial, sans-serif;
}

#player,
.stage {
    width: 100%;
    height: 100%;
}

.stage {
    position: relative;
    background: #000;
    overflow: hidden;
}

.content-node,
.stage img,
.stage video,
.stage iframe,
.message {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.content-node {
    opacity: 0;
    transition: opacity 450ms ease;
    background: #000;
}

.content-node.is-visible {
    opacity: 1;
}

.stage img,
.stage video,
.stage iframe {
    border: 0;
    object-fit: contain;
    background: #000;
}

.message {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ddd;
    font-size: 1.5rem;
    text-align: center;
    padding: 24px;
    background: #000;
}