body{margin:0;font-family:Arial;background:#1f2328;color:#fff}header{display:flex;justify-content:space-between;padding:20px;background:#111}a{color:#3ddc84;text-decoration:none;margin:0 10px}.hero{padding:100px 20px;text-align:center;background:#222}.btn{display:inline-block;padding:12px 24px;background:#14833B;color:#fff;border-radius:6px}.cards{display:flex;gap:20px;padding:20px}.cards div{flex:1;background:#2b3137;padding:20px;border-radius:8px}footer{text-align:center;padding:20px;background:#111}