#avatar {margin-top: 80px;}
#container-a-propos {max-width: 1400px;left: 50%;-ms-transform: translateX(-50%);-webkit-transform: translateX(-50%);transform: translateX(-50%);}
@media (max-width:768px) {#avatar {max-height: 300px !important;width: 100%;}}
@media (min-width:769px) {//DESKTOP
  #avatar {min-height: 550px;width: 50%;}}