css
/* styles.css */
body {
  background-color: #f0f0f0;
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

h1 {
  font-size: 24px;
  text-align: center;
  color: #ff0000;
  border-bottom: 4px solid #000000;
  margin-bottom: 10px;
  padding-bottom: 10px;
}

h2 {
  font-size: 18px;
  text-align: center;
  color: #0000ff;
  border-bottom: 4px solid #000000;
  margin-bottom: 10px;
  padding-bottom: 10px;
}

h3 {
  font-size: 14px;
  text-align: center;
  color: #00ff00;
  border-bottom: 4px solid #000000;
  margin-bottom: 10px;
  padding-bottom: 10px;
}

body > h1 {
  background-color: #000000;
  padding: 10px;
  border: 4px solid #000000;
  border-radius: 10px;
  -webkit-box-shadow: 0 0 10px #000000;
  -moz-box-shadow: 0 0 10px #000000;
  box-shadow: 0 0 10px #000000;
}

a {
  text-decoration: none;
  color: #0000ff;
  border-bottom: 4px solid #000000;
  padding: 2px 4px;
  background-color: #f7f7f7;
  border-radius: 4px;
  text-align: left;
  display: inline-block;
  margin-bottom: 5px;
  text-transform: lowercase;
}

a:hover {
  background-color: #c0c0c0;
  color: #000000;
  border-bottom: 4px solid #000000;
  padding: 2px 4px;
  text-decoration: none;
  -webkit-transition: background-color 0.2s ease-in-out;
  -moz-transition: background-color 0.2s ease-in-out;
  transition: background-color 0.2s ease-in-out;
}

a:link {
  text-decoration: none;
  color: #0000ff;
  border-bottom: 4px solid #000000;
  padding: 2px 4px;
  background-color: #f7f7f7;
  border-radius: 4px;
  text-align: left;
  display: inline-block;
  margin-bottom: 5px;
  text-transform: lowercase;
}

p {
  font-size: 14px;
  line-height: 1.5;
  margin: 10px;
  padding: 10px;
  background-color: #f7f7f7;
  border: 4px solid #000000;
  border-radius: 4px;
  text-align: left;
  color: #000000;
  text-transform: lowercase;
  -webkit-box-shadow: 0 0 10px #000000;
  -moz-box-shadow: 0 0 10px #000000;
  box-shadow: 0 0 10px #000000;
}

p + p {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 4px solid #000000;
}

div {
  display: block;
  padding: 10px;
  margin: 10px;
  background-color: #f7f7f7;
  border: 4px solid #000000;
  border-radius: 4px;
  text-align: left;
  font-family: 'Open Sans', sans-serif;
}

/* Styles for the content */
h1 {
  background-image: linear-gradient(-180deg, #ff0000, #ff0000);
  background-size: 20px 20px;
  -webkit-background-clip: border-box;
  -webkit-background-clip: border-box;
  -moz-background-clip: border;
  background-clip: border-box;
  -webkit-border: 2px solid #000000;
  border: 2px solid #000000;
  border-top: 2px solid #000000;
  border-bottom: 2px solid #000000;
  border-left: 2px solid #000000;
  border-right: 2px solid #000000;
}

h2 {
  background-image: linear-gradient(-180deg, #0000ff, #0000ff));
  background-size: 20px 20px;
  -webkit-background-clip: border-box;
  -webkit-background-clip: border-box;
  -moz-background-clip: border;
  background-clip: border-box;
  -webkit-border: 2px solid #000000;
  border: 2px solid #000000;
  border-top: 2px solid #000000;
  border-bottom: 2px solid #000000;
  border-left: 2px solid #000000;
  border-right: 2px solid #000000;
}

h3 {
  background-image: linear-gradient(-180deg, #00ff00, #00ff00));
  background-size: 20px 20px;
  -webkit-background-clip: border-box;
  -webkit-background-clip: border-box;
  -moz-background-clip: border;
  background-clip: border-box;
  -webkit-border: 2px solid #000000;
  border: 2px solid #000000;
  border-top: 2px solid #000000;
  border-bottom: 2px solid #000000;
  border-left: 2px solid #000000;
  border-right: 2px solid #000000;
}

h1, h2, h3 {
  font-family: 'Open Sans', sans-serif;
  text-align: center;
}