:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #050505;
}

body {
  display: grid;
  min-height: 100vh;
  place-items: center;
}

main {
  width: min(100vw, 177.78vh);
}

video {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
}