css
body {
  font-family: 'Futura', 'Arial', sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background: -webkit-linear-gradient(left, #FF0000, #00FF00);
  background: linear-gradient(to right, #FF0000, #00FF00);
  padding: 16px;
  border: 4px solid #000000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
}

h1 {
  font-size: 36px;
  font-weight: bold;
  color: #00FF00;
  text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
}

h2 {
  font-size: 24px;
  font-weight: bold;
  font-family: 'Courier New', monospace;
  color: #000000;
  border-bottom: 4px solid #000000;
}

.tagline {
  font-size: 24px;
  font-family: 'Courier New', monospace;
  color: #000000;
  text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
  padding: 8px 16px;
  border-bottom: 4px solid #000000;
  background: #FF0000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
}

section {
  padding: 16px;
  background: #FFFFFF;
  border: 4px solid #000000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
}

section-content {
  background: #FFFFFF;
  padding: 16px;
  border: 4px solid #000000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
}

section-content h2 {
  font-size: 24px;
  font-weight: bold;
  font-family: 'Courier New', monospace;
  color: #00FF00;
  border-bottom: 4px solid #000000;
  background: #FF0000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
}

.btn {
  background: #00FF00;
  color: #000000;
  border: none;
  border-bottom: 4px solid #000000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
  padding: 8px 16px;
  text-decoration: none;
  font-size: 24px;
  font-weight: bold;
  text-align: center;
  cursor: pointer;
}

footer {
  background: #000000;
  color: #FFFFFF;
  padding: 16px;
  border: 4px solid #000000;
  border-radius: 4px;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
  text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
}