body {
  background-image: url("bg_tile_lighter.png");
  background-repeat: repeat;
}
main {
  & section {
    display: flex;
    align-items: center;
    justify-content: center;
    & video {
      width: 100%;
      height: 100dvh;
      object-fit: fill;
    }
  }
}

@media (min-width: 768px) {
  main {
    & section {
      & video {
        width: 540px;
        object-fit: contain;
      }
    }
  }
}