main {
  border: 1px solid #30363d;
  max-width: 700px;
  color: #f0f6fc;
  padding: 50px;
  margin: 100px auto 100px auto;
}

hr {
  color: #30363d;
}

h1 {
  text-align: center;
  font-size: 32px;
  font-weight: bold;
}

h2 {
  margin: 40px 0 0 0;
  font-size: 24px;
  font-weight: bold;
}

p {
  font-size: 18px;
  margin: 10px 0;
}

a {
  text-decoration: none;
  font-weight: bold;
  color: #58a6ff;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: Consolas, 'courier new';
  color: #f0f6fc;
  background-color: #393f48;
  border-radius: 8px;
  padding: 3px;
}

pre code {
  background-color: #161b22;
  display: block;
  padding: 20px;
}

aside {
  color: #8b949e;
  font-size: 12px;
  margin: 10px 0;
  font-style: italic;
}

.list {
  margin: 10px 40px;
}

.upper {
  list-style-type: circle;
}

.sub {
  list-style-type: disc;
}