body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #ff6b35; text-align: center; }
        h2 { color: #00a8cc; border-bottom: 2px solid #ff6b35; padding-bottom: 5px; }
        h3 { color: #4b8e8b; }
        .logo { font-size: 28px; font-weight: bold; color: #ff6b35; text-align: center; margin: 20px 0; }
        .nav { background: #00a8cc; padding: 10px; text-align: center; position: sticky; top: 0; }
        .nav a { color: white; margin: 0 15px; text-decoration: none; }
        .mobile-nav-toggle { display: none; background: #ff6b35; color: white; border: none; padding: 10px; cursor: pointer; }
        .download-btn { background: #ff6b35; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 10px 0; }
        .login-btn { background: #4b8e8b; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 10px 0; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        footer { background: #333; color: white; text-align: center; padding: 20px; margin-top: 30px; }
        @media (max-width: 768px) {
            .nav { display: none; }
            .mobile-nav-toggle { display: block; }
            .nav.active { display: block; }
        }