body,html{height:100%;margin:0;background:#d8dce3}body{display:flex;justify-content:center;align-items:center}.container{margin:auto;text-align:center;background-color:#fff;padding:40px;border-radius:10px;box-shadow:0 5px 10px rgba(0,0,0,.1);max-width:400px;width:100%}.captcha-box h1{color:#333;font-size:24px;margin-bottom:10px}.captcha-box p{color:#666;font-size:16px;margin-bottom:30px}@media screen and (max-width:480px){.container{padding:20px}}img.responsive-img{max-width:100%;height:auto}