body{font-family:Arial;margin:0;background:#f4f7fb}nav{text-align:center;padding:14px;background:#fff;border-bottom:1px solid #ddd}nav a{margin:0 12px;text-decoration:none;color:#1565c0}header{text-align:center;padding:50px;background:#eef5fb}.container{max-width:1100px;margin:auto;padding:20px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.card{background:#fff;padding:16px;border-radius:10px}img{max-width:100%}footer{text-align:center;padding:24px;color:#666}