body {
  /* https://pattern.monster/memphis-2
   * https://www.svgviewer.dev/svg-to-data-uri
   */
  background-attachment: fixed;
  background-image:
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}

.box {
  border-width: 0.25em;
  border-radius: 1em 0 1em 0;
}

@media (max-width:768px) {
  video { aspect-ratio: 9/16;   }
}
video   { aspect-ratio: 16/9;   }
footer  { border-width: 0.25em; }