.thankyou-billing-details{max-width:400px;margin:20px auto;background:#fff;padding:20px;border-radius:10px;box-shadow:0 0 10px rgba(0,0,0,.1)}.thankyou-billing-details h2{text-align:center;font-size:22px;margin-bottom:15px}.thankyou-billing-details p{font-size:16px;margin:5px 0;border-bottom:1px solid #ddd;padding-bottom:5px}