body {
 background-color: #010101;
}

.frame {
 position: relative;
 width: 80vw;
 max-width: 600px;
 aspect-ratio: 16/9;
 margin: 20vh auto;
 outline: dashed 2px #272d2a;
 border-radius: 10px;
}

.panel {
 flex-direction: column;
 min-height: 50vh;
 background: transparent;
}

/* each frame contains its own GL canvas; it scrolls with the page */
.frame canvas {
 position: absolute;
 inset: 0.5rem;
 width: calc(100% - 1rem);
 height: calc(100% - 1rem);
 display: block;
}

.spacer {
 height: 10vh;
}