css
/* styles.css */
body {
  background-color: #f2f2f2;
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  color: #333;
}

body * {
  border: 4px solid black;
  border-width: 4px;
}

h1 {
  font-size: 36px;
  color: #f0f0f0;
  font-weight: bold;
  letter-spacing: 0.2em;
  margin: 0px 0px 0px 0px;
  padding: 4px 0px 0px 0px;
  text-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
  border-bottom: 4px solid black;
  width: 100%;
  text-align: center;
  margin-bottom: 16px;
}

p {
  font-size: 20px;
  font-weight: bold;
  margin: 16px 0px 16px 0px;
  padding: 4px 4px 4px 4px;
  border: 4px solid black;
  border-top: none;
  text-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
  width: 50%;
  margin: 0 auto;
  background: linear-gradient(90deg, #ff0000, #00ff00, #0000ff);
  -webkit-background-clip: border-box;
  -webkit-backface-clip: border-box;
  -webkit-clip: border-box;
  -webkit-mask-box-clip: border-box;
  -webkit-mask-corners: 4px 4px 4px 4px;
  background-clip: border-box;
  backface-clip: border-box;
  mask-box-clip: border-box;
  mask-corners: 4px 4px 4px 4px;
  box-sizing: border-box;
  display: inline-block;
}

h2 {
  font-size: 24px;
  color: #f0f0f0;
  font-weight: bold;
  letter-spacing: 0.2em;
  margin: 8px 0px 8px 0px;
  padding: 4px 0px 4px 0px;
  text-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
  border-bottom: 4px solid black;
  width: 75%;
  text-align: center;
  margin-bottom: 16px;
}

a {
  text-decoration: none;
  color: #00ff00;
  text-transform: uppercase;
  font-weight: bold;
  font-size: 18px;
  transition: color 0.2s;
  transition-timing-function: ease-in-out;
  transition-duration: 0.2s;
  border-bottom: 2px solid black;
  border-radius: 0px 0px 0px 0px;
  text-decoration: none;
  background: linear-gradient(90deg, #ff0000, #00ff00, #0000ff);
  -webkit-background-clip: border-box;
  -webkit-backface-clip: border-box;
  -webkit-clip: border-box;
  -webkit-mask-box-clip: border-box;
  -webkit-mask-corners: 4px 4px 4px 4px;
  background-clip: border-box;
  backface-clip: border-box;
  mask-box-clip: border-box;
  mask-corners: 4px 4px 4px 4px;
  box-sizing: border-box;
}

/* styles for subpages */
.subpage {
  background: linear-gradient(90deg, #00ff00, #ff0000, #0000ff);
  -webkit-background-clip: border-box;
  -webkit-backface-clip: border-box;
  -webkit-clip: border-box;
  -webkit-mask-box-clip: border-box;
  -webkit-mask-corners: 4px 4px 4px 4px;
  background-clip: border-box;
  backface-clip: border-box;
  mask-box-clip: border-box;
  mask-corners: 4px 4px 4px 4px;
  box-sizing: border-box;
  padding: 8px 8px 8px 8px;
  border: 4px solid black;
  border-width: 4px;
  border-style: solid;
  border-radius: 4px 4px 4px 4px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
  margin: 8px 0px 8px 8px;
  text-align: center;
  color: #f0f0f0;
  font-size: 20px;
  font-weight: bold;
  line-height: 24px;
  letter-spacing: 0.2em;
  transition: color 0.2s;
  transition-timing-function: ease-in-out;
  transition-duration: 0.2s;
  text-transform: uppercase;
  border-bottom: 4px solid black;
}