body {
  font-family: Arial, sans-serif;
  max-width: 600px;
  margin: 60px auto;
  padding: 0 20px;
  color: #111;
  background: #fcf5ee;
}

h1 { font-size: 3rem; margin: 0 0 40px; }

a { color: #111; text-decoration: none; }
a:hover { text-decoration: underline; }

.back { font-size: 0.9rem; display: block; margin-bottom: 30px; }

nav a { display: block; padding: 10px 0; border-bottom: 1px solid #ddd; }
nav a:first-child { border-top: 1px solid #ddd; }