.is-animated {
  opacity: 0;
  transform: translateY(35%);
  transition: opacity 0.7s, transform 0.7s;
}
.is-animated.scrolled-into-view {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s, transform 0.7s;
}
.scrolled-into-view-first-time {
  opacity: 1!important;
  transform: translateY(0);
}

article {
  width: 700px;
  margin: 100px auto;
  font-family: sans-serif;
}
article h1, article h2, article h3, article h4, article h5, article h6 {
  margin-bottom: 0.5em;
}
article h1 {
  font-size: 2.5rem;
}
article h2 {
  font-size: 2rem;
}
article h3 {
  font-size: 1.75rem;
}
article h4 {
  font-size: 1.5rem;
}
article h5 {
  font-size: 1.25rem;
}
article h6 {
  font-size: 1.25rem;
}
article p {
  margin-bottom: 1em;
  font-size: 1rem;
  line-height: 1.4em;
}
article p:last-child {
  margin-bottom: 0;
}
article p a {
  color: inherit;
}
article strong {
  font-weight: bold;
}
article em {
  font-style: italic;
}
article ul {
  list-style: disc;
  margin: 1em 0;
  padding-left: 25px;
}
article ul li {
  font-size: 1rem;
  line-height: 1.2em;
  margin-bottom: 0.2em;
}
article ul li a {
  color: inherit;
}
article ul:first-child {
  margin-top: 0;
}
article ul:last-child {
  margin-bottom: 0;
}
article ol {
  list-style: decimal;
  margin: 1em 0;
  padding-left: 25px;
}
article ol li {
  font-size: 1rem;
  line-height: 1.2em;
  margin-bottom: 0.2em;
}
article ol li a {
  color: inherit;
}
article ol:first-child {
  margin-top: 0;
}
article ol:last-child {
  margin-bottom: 0;
}
article blockquote {
  border-top: 1px solid black;
  border-bottom: 1px solid black;
  padding: 25px 0;
  margin: 1em 0;
}
article blockquote:first-child {
  margin-top: 0;
}
article blockquote:last-child {
  margin-bottom: 0;
}
article pre {
  display: block;
  background: lightgray;
  padding: 15px 25px;
  margin: 1em 0;
}
article pre:first-child {
  margin-top: 0;
}
article pre:last-child {
  margin-bottom: 0;
}
article code {
  font-family: monospace;
}