body {
 font-family: sans-serif;
   
}
h1{
  text-align: center;
  color: rgb(15, 71, 224);
  margin: 30px 0 50px;
}
.header img {
  float: left;
  width: 100px;
  height: 75px;
  background: #555;
}

.header h1 {
  position: relative;
  top: 18px;
  left: 10px;
}
.galerie{
margin: 10px 50px;
}.galerie img{
  max-width: 100%;
  padding: 5px;
  transition: 1s;
  

}
.galerie img:hover{
  transform: scale(1.1);
}