html{
  background-color : lightblue ;
}

h1, h2{
  text-align: center ;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
}

.flex{
  display : flex;
  flex-direction: column;
  align-items: center;
}

.item{
  padding: 10px;
  margin: 5px;
  border: solid 1px blue;
  flex-wrap: wrap ;
  border-radius: 15px;
  background-color : white ;
  line-height: 1.5em ;
}

.center{
  text-align: center ;
}