div.galeria {
  width: 80%;
  background-color: white;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
  margin-bottom: 25px;
  margin-left: auto;
  margin-right: auto;
}
 

div.container {
  text-align: center;
  padding: 10px 20px;
}