*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

body {
  background-color: black; 
  display: flex; 
  justify-content: center; 
  align-items: center;
  padding: 0;
  height: 100%;
  width: 100%;
}

video {
  display: block;
  max-width: 100svw;
  max-height: 100svh;
  width: auto;
  height: auto;
}