css
/* Epigenetics CSS */

body {
  background-color: #f7f7f7;
  font-family: 'Arial Black', Arial, sans-serif;
}

h1 {
  border: 4px solid black;
  padding: 2px 6px 2px 6px;
  text-shadow: 2px 2px 6px black;
  font-size: 24px;
  font-weight: bold;
}

h2 {
  border: 4px solid black;
  padding: 2px 6px 2px 6px;
  text-shadow: 2px 2px 6px black;
  font-size: 18px;
  font-weight: bold;
}

h3 {
  border: 4px solid black;
  padding: 2px 6px 2px 6px;
  text-shadow: 2px 2px 6px black;
  font-size: 18px;
  font-weight: bold;
  margin: 0 0 10px 0;
  color: pink;
}

p {
  margin: 10px 0 10px 0;
  line-height: 1.5;
  font-family: 'Arial Black', Arial, sans-serif;
  font-size: 14px;
  border: 2px solid black;
  padding: 2px 4px 2px 4px;
  text-shadow: 1px 1px 2px black;
}

a {
  text-decoration: none;
  color: #03A9FC;
  border: 4px solid black;
  padding: 4px 6px 4px 6px;
  text-shadow: 2px 2px 6px black;
  font-size: 16px;
  font-weight: bold;
}

a:hover {
  background-color: #03A9FC;
  color: black;
  text-decoration: none;
  border: 4px solid black;
  padding: 4px 6px 4px 6px;
  text-shadow: 2px 2px 6px black;
  font-size: 16px;
  font-weight: bold;
}

#logo {
  background-image: linear-gradient(to bottom, #03A9FC, #f7f7f7);
  padding: 10px 20px;
  border: 2px solid black;
  font-size: 36px;
  font-weight: bold;
  text-shadow: 2px 2px 6px black;
}

body > header {
  background-color: #f7f7f7;
  padding: 20px 20px;
  border: 2px solid black;
  border-bottom: 4px solid black;
  margin-bottom: 20px;
}

body > nav {
  background-color: #f7f7f7;
  padding: 10px 20px;
  border: 2px solid black;
  border-bottom: 4px solid black;
  margin-bottom: 20px;
}

body > main {
  background-color: #f7f7f7;
  padding: 10px 20px;
  border: 2px solid black;
  margin-bottom: 20px;
  background-image: linear-gradient(to top, #f7f7f7, #03A9FC);
  background-position: 0 0;
  background-size: 0 20px;
  background-repeat: repeat;
  background-attachment: fixed;
  background-origin: content-box;
}

body > footer {
  background-color: #f7f7f7;
  padding: 20px 20px;
  border: 2px solid black;
  border-top: 4px solid black;
  margin-top: 20px;
}

body > aside {
  background-color: #f7f7f7;
  padding: 20px 20px;
  border: 2px solid black;
  margin-bottom: 20px;
  background-image: linear-gradient(to bottom, #03A9FC, #f7f7f7);
  background-position: 0 0;
  background-size: 0 20px;
  background-repeat: repeat;
  background-attachment: fixed;
  background-origin: content-box;
}

body > section {
  background-color: #f7f7f7;
  padding: 20px 20px;
  border: 2px solid black;
  margin-bottom: 20px;
  background-image: linear-gradient(to top, #f7f7f7, #03A9FC);
  background-position: 0 0;
  background-size: 0 20px;
  background-repeat: repeat;
  background-attachment: fixed;
  background-origin: content-box;
}

body > header > h1 {
  background-color: #f7f7f7;
  padding: 20px 20px;
  border: 2px solid black;
  border-bottom: 4px solid black;
  margin-bottom: 20px;
  background-image: linear-gradient(to bottom, #03A9FC, #f7f7f7);
  background-position: 0 0;
  background-size: 0 20px;
  background-repeat: repeat;
  background-attachment: fixed;
  background-origin: content-box;
}

body > header > h2 {
  background-color: #f7f7f7;
  padding: 20px 20px;
  border: 2px solid black;
  border-bottom: 4px solid black;
  margin-bottom: 20px;
  background-image: linear-gradient(to top, #f7f7f7, #03A9FC);
  background-position: 0 0;
  background-size: 0 20px;
  background-repeat: repeat;
  background-attachment: fixed;
  background-origin: content-box;
}