body { background: #0f0f0f; color: #fff; padding: 40px; font-family: sans-serif; }
    h1 { color: #00ffff; }
    pre {
      background: #1e1e1e; padding: 20px; border-radius: 8px;
      overflow-x: auto; color: #00ffea;
    }
    a.btn { background: #00adb5; color: white; padding: 10px 20px; text-decoration: none; border-radius: 6px; margin-top: 20px; display: inline-block; }
    a.btn:hover { background: #0197a3; }