css
/* Styles.css */

body {
  background-color: #FF0000;
  font-family: "Courier", "monospace";
  font-size: 18px;
  line-height: 1.5;
  margin: 0;
  padding: 0;
  border: 4px solid #000000;
  border-style: solid;
  border-width: 4px;
  border-color: #000000;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

h1, h2, h3, h4 {
  color: #00FF00;
  font-weight: bold;
  font-size: 24px;
  margin-bottom: 8px;
  border-bottom: 2px solid #000000;
  border-top: 2px solid #000000;
  padding: 4px 8px;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

h2 {
  color: #0000FF;
  font-size: 20px;
  border-bottom: 1px solid #000000;
  padding: 4px 8px;
  margin-bottom: 16px;
}

h3 {
  color: #0000FF;
  font-size: 18px;
  margin-bottom: 8px;
  border-bottom: 1px solid #000000;
  padding: 4px 8px;
}

h4 {
  color: #008000;
  font-size: 16px;
  border-bottom: 1px solid #000000;
  padding: 4px 8px;
  margin-bottom: 16px;
}

body > div {
  width: 600px;
  margin: 16px auto 16px auto;
  background-color: #FFFF00;
  border: 1px solid #000000;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  padding: 16px;
  text-align: center;
}

a {
  text-decoration: none;
  color: #0000FF;
  background-color: #FFFF00;
  border: 1px solid #000000;
  padding: 4px 8px;
  border-radius: 4px;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  font-weight: bold;
}

a:hover {
  background-color: #FF0000;
  color: #000000;
}

a:active {
  background-color: #008000;
  color: #000000;
}