:root {
  --white: white;
  --black: black;
}

.body {
  background-image: url('../images/timebloque-bg.jpg');
  background-position: 50%;
  background-size: auto;
}

@media screen and (max-width: 479px) {
  .body {
    background-image: url('../images/timebloque-vert.jpg');
    background-size: cover;
  }
}