body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #8B0000; text-align: center; margin-bottom: 30px; }
        h2 { color: #A52A2A; border-bottom: 2px solid #FFD700; padding-bottom: 5px; }
        h3 { color: #CD853F; }
        .logo { font-size: 2.5em; font-weight: bold; text-align: center; margin: 20px 0; }
        .nav { background-color: #FFD700; padding: 10px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        .nav a { color: #8B0000; text-decoration: none; font-weight: bold; }
        .mobile-nav-btn { display: none; background: #8B0000; color: white; border: none; padding: 10px; }
        .content { margin-top: 30px; }
        .download-btn, .login-btn { display: block; text-align: center; margin: 20px auto; padding: 15px; background: #8B0000; color: white; text-decoration: none; font-weight: bold; max-width: 200px; }
        img { max-width: 100%; height: auto; display: block; margin: 20px auto; }
        .footer { margin-top: 50px; text-align: center; padding: 20px; background: #F5F5F5; }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; }
            .mobile-nav-btn { display: block; }
            .nav.active { display: flex; }
        }