main{width:85%;margin:0 auto}#form_wrapper{width:70%;margin:200px auto}.input-group{margin-top:50px}#submit{margin:0 auto}@media screen and (max-width:450px){h1{font-size:30px}h2{font-size:28px}h3{font-size:26px}h4{font-size:24px}h5{font-size:22px}h6{font-size:20px}p{font-size:12px}#form_wrapper{width:95%}}