.modern-title{font-family:Arial,sans-serif;font-size:2.5rem;color:#333;margin-bottom:2rem}.classic-label{font-family:Georgia,serif;font-size:1.1rem;color:#555}.classic-input{border:1px solid #ccc;border-radius:4px;padding:.5rem;font-size:1rem}.modern-button{background-color:#007bff;color:white;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;transition:background-color .3s ease}.modern-button:hover{background-color:#0056b3}.qr-code-container{border:1px solid #ddd;padding:2rem;border-radius:8px;margin-top:1rem}.spinner{border:4px solid rgba(0,0,0,.1);border-left-color:#007bff;border-radius:50%;width:30px;height:30px;animation:spin 1s linear infinite;margin:0 auto 1rem}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}