.kr-smart-form{max-width:400px;margin:0 auto;padding:20px;border:1px solid #ccc;border-radius:8px;background-color:#f9f9f9;box-shadow:0 4px 6px rgba(0,0,0,.1)}.kr-smart-form .kr-input{margin-bottom:10px;border:1px solid #ccc;border-radius:4px;padding:10px;width:100%;box-sizing:border-box}.kr-smart-form .kr-payment-button{margin-top:15px;display:block;width:100%;padding:10px;background-color:#007bff;color:white;border:none;border-radius:4px;font-size:16px;cursor:pointer}.kr-smart-form .kr-payment-button:hover{background-color:#0056b3}