.sourse{
  font-size:0.9em;
  margin-left:20%;
  margin-right:20%;
  line-height:1.3em;
}
.checklist{
  list-style:square;
}
.link{
  font-size:0.9em;
  text-decoration:underline;
  border:none;
  width:100%;
  text-align:left;
}