section{padding:80px 20px;max-width:1200px;margin:0 auto}h1,h2,h3{line-height:1.2}h1{font-size:2.8rem}h2{font-size:2rem;margin-bottom:20px}h3{font-size:1.4rem}p{line-height:1.6;color:#555}img{max-width:100%;border-radius:8px}footer{background:#111;color:#bbb;text-align:center;padding:1rem;font-size:.9rem}