body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  background-color: #f7f9fc;
}
.content-card {
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}
h1, h2 { color: #1a1a1a; }
a { color: #007bff; text-decoration: none; }
a:hover { text-decoration: underline; }
.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-weight: 600;
}