#contenant {
    font-family: Roboto Slab;
    padding: 0;
    margin: 0;
    color: white;
    position: center;
    background: url('../img/lion-image_01582298_22.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    height: 120vh;
  }

Add position to background in pc
Add position to background in pc
