/* Block-level elements */
body {
  color: #aaa;
  max-width: 500px;
  margin: auto;
  padding: 10px;
  background: #ddd;
}

h1 {
  margin: 50px auto 50px auto;
  text-align: center;
  color: #604050;
}

h2 {
  margin-top: 50px;
}

p {
  padding-left: 10px;
  padding-bottom: 10px;
}

/* Inlilne elements */

a {
  color: #a08090;
  font-style: italic;
}

/* Decorative elements */
iframe {
  border-style: none;
  width: 100%;
  height: 100%;
}

hr {
  margin-left: 20%;
  margin-right: 20%;
  border-style: solid;
  border-width: 5px;
  color: #82a499;
}

/* Expanding tabs */
details {
  margin-bottom: 15px;
  border-style: none none none solid;
  border-width: 7px;
  border-color: #604050;
}

summary {
  font-weight: bold;
  padding: 10px;
}

summary:open {
  background: #80a090;
  color: #401040;
  font-weight: bold;
}