html,body{height:100%;margin:0;font-family:Roboto,sans-serif}body{background-color:#f4f6f9;line-height:1.6}h1,h2,h3,h4,h5,h6{margin:0 0 1rem;color:#333}h2{text-align:center;font-size:2.5rem;margin-bottom:2rem}section{padding:4rem 0}img{max-width:100%;height:auto}