body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #ff6b35; text-align: center; }
        h2 { color: #4ecdc4; border-bottom: 2px solid #ff6b35; padding-bottom: 5px; }
        h3 { color: #ff9f1c; }
        .logo { font-size: 28px; font-weight: bold; color: #ff6b35; text-align: center; margin: 20px 0; }
        .nav { background-color: #333; overflow: hidden; display: flex; justify-content: space-around; padding: 10px; }
        .nav a { color: white; text-decoration: none; padding: 10px; }
        .mobile-nav-btn { display: none; }
        .content { margin: 20px 0; }
        .download-btn, .login-btn { display: inline-block; background-color: #4ecdc4; color: white; padding: 10px 20px; margin: 10px 0; text-decoration: none; border-radius: 5px; }
        .img-container { text-align: center; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tag { background-color: #eee; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }
        .copyright { text-align: center; margin-top: 40px; padding: 20px; background-color: #333; color: white; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .mobile-nav-btn { display: block; background-color: #4ecdc4; color: white; border: none; padding: 10px; margin: 10px auto; width: 100%; }
            .nav.active { display: flex; }
        }