html, body {
  height: 100%;
  margin: 0;
  background: black;
  display: flex;
  justify-content: center; 
  align-items: center;    
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 50vw;
  height: 50vh;
}

.center {
  width: 100%;
  height: 100%;
  object-fit: contain;
}