body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF4500; border-bottom: 3px solid #FFD700; padding-bottom: 10px; }
        h2 { color: #8B4513; margin-top: 30px; }
        h3 { color: #008080; }
        .nav { background: #FFD700; padding: 15px; position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; }
        .nav-mobile { display: none; }
        .download-btn { background: #FF4500; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; font-weight: bold; margin: 15px 0; display: inline-block; }
        .login-btn { background: #008080; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; font-weight: bold; margin: 15px 0; display: inline-block; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { background: #333; color: white; padding: 20px; text-align: center; margin-top: 50px; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; }
            .nav-desktop { display: none; }
            .nav-mobile { display: block; margin-bottom: 15px; }
        }