body { font-family: Arial, sans-serif; margin:0; padding:0; line-height:1.6; }
nav { background: #004080; color: white; position: sticky; top:0; padding: 10px 20px; z-index: 1000; }
nav ul { list-style: none; margin:0; padding:0; display: flex; gap: 20px; }
nav ul li { display: inline; }
nav ul li a { color: white; text-decoration: none; font-weight: bold; }
nav ul li a:hover { text-decoration: underline; }
section { padding: 20px; max-width: 900px; margin: auto; }
h1, h2, h3 { color: #004080; }
footer { background: #eee; text-align: center; padding: 15px; margin-top: 30px; font-size: 0.9em; color: #666; }