img{
  margin: 15px auto;
  width: 100%;
  max-width: 1920px;
  display: block;
}

body {
  font-family: Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  color: rgba(0, 0, 0, 0.8);
  background-color: rgba(0, 0, 0, 1);
  transition: opacity 2s linear;
}