body{margin:0;padding:0;font-family:Arial,sans-serif;background-color:#f4f4f4;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;text-align:center}.container{max-width:100%;padding:20px;box-sizing:border-box}h1{color:#333;margin-bottom:20px}.main-link{display:inline-block;margin-top:20px;padding:10px 20px;background-color:#007bff;color:#fff;text-decoration:none;border-radius:5px;transition:background-color .3s}.main-link:hover{background-color:#0056b3}@media(max-width:768px){.container{padding:10px}h1{font-size:1.5em}}