body {
  color: #000;
  line-height: 1.8em;
}
.container {
  background-color: #f0f0f0;
  margin: 1rem auto;
  padding: 3rem;
}
header {
  margin: 2rem 0 4rem 0; 
  text-align: center;
}
h1.title {
  font-size: 6rem;
  margin-bottom: 0;
}
main {
  margin: 1rem 5%;
  padding: 2rem;
  background-color: #eee;
  min-width: 50%;
}
nav {
  text-align: center;
  margin: 1.5rem 0;
}
.row {
  margin-top: 3rem;
}
article {
  margin-bottom: 3rem;
}
h1, h2, h3, h4, h5, h6 {
  font-weight: bold;
}
h4 {
  padding: .2rem 0 .2rem 1rem;
  margin-bottom: 2rem;
  border-color: #000;
  border-style: solid;
  border-width: 0 0 1px 6px;
}
article h5 {
  font-size: 1.4em;
  margin: 1rem 0;
}

aside {
  line-height: 1.6em;
}
aside h5 {
  font-weight: normal;
  padding: .2rem 0;
  border-style: solid;
  border-width: 1px 0;
  border-color: #000;
}
ul {
  list-style-type: disc;
  margin: 0;
}
li {
  padding-left: .5rem;
  margin-bottom: 0;
}
.rind {
  padding-left: 1em;
}
.rind p {
  margin: 0;
  text-indent: -1em;
}
.btn {
  font-weight: bold;
  display: inline-block;
  background-color: #ccc;
  color: #000;
  padding: .3rem 1rem;
  margin-bottom: .3rem;
  text-decoration: none;
  border-radius: 4px;
}
a {
  color: #000;
}
a:hover {
  color: #000;
  background-color: #ddd;
}
a.btn {
  background-color: #000;
  color: #fff;
}
a.btn:hover {
  background-color: #ccc;
  color: #000;
}
.btn-frame {
  font-weight: bold;
  display: inline-block;
  color: #666;
  padding: .2rem .4rem;
  border: 2px solid #666;
  border-radius: 4px;
}
.articles p {
  padding-left: 3.5em;
  text-indent: -3.5em;
  margin: 0;
}
.articles p.chap {
  text-indent: 0;
  margin: 1em 0;
}
.articles p.sub {
  text-indent: -1.5em;
}