css
body {
  background-color: #000;
  font-family: "Helvetica, Arial, sans-serif";
  font-size: 14px;
  line-height: 18px;
  color: #fff;
  text-align: center;
  margin: 0;
  padding: 0;
}

body, html {
  background-image: url('https://www.example.com/astro-cat/blanket-of-snow.jpg');
  background-size: 100vh 100vw;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

h1 {
  color: #ff0a0a;
  border: 4px solid #000;
  padding: 10px 0;
  font-size: 36px;
  font-weight: bold;
  text-shadow: 0 0 10px #000;
}

h2 {
  color: #00ff00;
  border: 4px solid #000;
  padding: 10px 0;
  font-size: 24px;
  font-weight: bold;
  text-shadow: 0 0 10px #000;
}

p {
  color: #000;
  border: 4px solid #fff;
  padding: 10px 0;
  font-size: 18px;
  text-shadow: 0 0 10px #000;
}

a {
  text-decoration: none;
  color: #fff;
  border: 4px solid #000;
  padding: 10px 20px;
  font-size: 18px;
  background: #ff0a0a;
  text-shadow: 0 0 10px #000;
  transition: all 0.2s ease;
}

a:hover {
  background: #ff0a0a;
  color: #000;
  border-color: #ff0a0a;
  box-shadow: 0 0 10px #000;
}