#presentation {

  background-image: url("../Img/cover1.png");
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: bottom;


  color:#ffffff;
  height: 500px;
}
.row{
  margin: 0;
}
#developerImg{
  width:250px;
  height:250px;
  border:solid black 5px;
}
.float-clear{
  clear:both;
}
#About-us{
  display: flex;
  flex-direction: column;
  align-items: center;
}

.wrapper{
  width:280px;
}
.dev-social a{
  display: block;
  font-size:1.2em ;
}