:root {
  color-scheme: dark;
  background: #000;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
}

.welcome-video {
  display: block;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  object-fit: contain;
  background: #000;
}