body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}
h1 { border-bottom: 2px solid #eee; padding-bottom: 10px; }
h2 { margin-top: 30px; border-left: 5px solid #007bff; padding-left: 10px; }
.contact { background: #f8f9fa; padding: 15px; border-radius: 5px; margin-top: 40px; }
footer { margin-top: 50px; text-align: center; color: #777; font-size: 0.9em; }
nav { margin-bottom: 20px; text-align: right; }
nav a { margin-left: 10px; text-decoration: none; color: #007bff; }