body{font-family:Arial,sans-serif;margin:0;padding:0;background-color:#f4f4f4}.container{max-width:1200px;margin:0 auto;padding:20px;text-align:center}h1{color:#333}.plans{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}.plan{background:#fff;border:1px solid #ddd;border-radius:8px;padding:20px;width:200px;box-shadow:0 2px 5px #0000001a}.plan h2{margin:0 0 10px;color:#007bff}.plan p{margin:0 0 20px;font-size:1.2em;color:#555}.buy-button{background:#007bff;color:#fff;border:none;padding:10px 20px;border-radius:5px;cursor:pointer;font-size:1em}.buy-button:hover{background:#0056b3}.buy-button:disabled{background:#ccc;cursor:not-allowed}.error{color:red;margin:10px 0}.back-link{display:inline-block;margin-top:20px;color:#007bff;text-decoration:none}.back-link:hover{text-decoration:underline}