body{background-color:#eee}h3{font-size:40px;font-weight:400}h3,h4{color:#222;font-family:sans-serif;text-align:center}h4{font-size:20px;font-weight:100;margin-bottom:10px}form{border-radius:2px;margin:0 auto;padding:13px 20px;width:290px}form label{visibility:hidden}form input{background-color:#fff;border:2px solid #777;border-radius:5px;color:#222;display:block;font-size:18px;height:32px;margin:5px 0;padding:0 5px;width:275px}form input::-moz-placeholder{color:#222;opacity:1}form input::-webkit-input-placeholder{color:#222}form input:-moz-placeholder{color:#222;opacity:1}form input:-ms-input-placeholder{color:#222}form input:focus{border:2px solid #0079ff}form #card_number{background-image:url(https://calculators.tipwho.com/cardvalidator/images.png);background-position:2px -121px,260px -61px;background-repeat:no-repeat;background-size:120px 361px,120px 361px;padding-left:54px;width:225px}form #card_number.visa{background-position:2px -163px,260px -61px}form #card_number.visa_electron{background-position:2px -205px,260px -61px}form #card_number.mastercard{background-position:2px -247px,260px -61px}form #card_number.maestro{background-position:2px -289px,260px -61px}form #card_number.discover{background-position:2px -331px,260px -61px}form #card_number.valid.visa{background-position:2px -163px,260px -87px}form #card_number.valid.visa_electron{background-position:2px -205px,260px -87px}form #card_number.valid.mastercard{background-position:2px -247px,260px -87px}form #card_number.valid.maestro{background-position:2px -289px,260px -87px}form #card_number.valid.discover{background-position:2px -331px,260px -87px}.cards{border-radius:2px;color:#777;display:block;font-family:sans-serif;font-size:14px;font-weight:400;margin:10px auto 0;padding:13px 20px;width:290px}.cards p{line-height:1.5}.cards a{color:#2e85e2;text-decoration:underline}.help{color:#777;font-family:sans-serif;font-size:10px}.help a{color:#fff}