#main{
  color: #04325b;
  background: rgba(255, 255, 255, 0.9);
  margin: 0 0 100px;
  padding: 15px;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, .3));
}

@media screen and (min-width: 900px){
  #main{
    padding: 100px;
    margin: 0 0 200px;
  }
}

.contentsArea{
  max-width: 800px;
  margin: 0 auto;
}

.backToList {
  text-align: center;
  font-family: 'Economica', sans-serif;
  font-weight: 600;
  font-size: 2rem;
  text-decoration: none;
  color: inherit;
  margin: 100px 0 16px;
}

.backToList a{
  text-decoration: none;
  color: inherit;
  transition: 0.5s;
  border-bottom: 2px solid transparent;
}

.backToList a:hover{
  border-color: #04325b;
}

.outlineList dd{
  font-size: 1.8rem;
}

.outlineList dd span{
  display: inline-block;
  white-space: pre-wrap;
}