body{padding:50px;font:14px "Lucida Grande",Helvetica,Arial,sans-serif}a{color:#00b7ff}body{font-family:Arial,sans-serif;background-color:#f0f0f0;color:#333;margin:0;padding:0}header{background-color:#4caf50;color:#fff;padding:20px;text-align:center}header img{max-width:100%;height:auto}main{padding:20px;text-align:center}footer{background-color:#333;color:#fff;text-align:center;padding:10px;position:fixed;width:100%;bottom:0}.button{background-color:#4caf50;color:#fff;padding:15px 20px;text-align:center;text-decoration:none;display:inline-block;margin:10px 0;border-radius:5px}.payment-form{max-width:400px;margin:0 auto;text-align:left}.payment-form label{display:block;margin:10px 0 5px}.payment-form input{width:100%;padding:10px;margin-bottom:10px}