*{margin:0;padding:0;box-sizing:border-box}
body{font-family:Arial,sans-serif;line-height:1.7;background:#f7f9fc;color:#222}
header{background:#1d3557;color:#fff;padding:40px 20px;text-align:center}
nav{background:#457b9d;display:flex;justify-content:center;flex-wrap:wrap}
nav a{color:#fff;text-decoration:none;padding:15px 20px}
.container{max-width:1200px;margin:auto;padding:25px}
.card,article{background:#fff;padding:20px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.08)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
footer{background:#1d3557;color:#fff;text-align:center;padding:20px;margin-top:40px}
img{max-width:100%;height:auto}