body{background:#f4f4f4;color:#333;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";line-height:1.6;margin:0;padding:0}header{background-color:#003399;color:white;padding:20px 0;text-align:center;position:relative}header h1{margin:0;padding:0 20px;font-size:2em}header h1 img{height:1.5rem}main{margin:20px auto;padding:20px;max-width:800px}h3{margin-top:3em}footer{background-color:#003399;color:white;text-align:center;padding:10px 0}