body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 2.5em; font-weight: bold; color: #ff4d4d; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        nav { background: #f8f8f8; padding: 15px; margin-bottom: 20px; }
        nav a { margin: 0 15px; text-decoration: none; color: #333; }
        .mobile-nav-toggle { display: none; }
        h1 { color: #ff4d4d; }
        h2 { color: #4a90e2; border-bottom: 2px solid #eee; padding-bottom: 5px; }
        h3 { color: #50c878; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; background: #ff4d4d; color: white; border-radius: 5px; margin: 15px 0; text-decoration: none; }
        .download-btn:hover, .login-btn:hover { background: #e03a3a; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        footer { margin-top: 40px; padding: 20px; background: #f8f8f8; }
        @media (max-width: 768px) {
            .mobile-nav-toggle { display: block; background: #ff4d4d; color: white; padding: 10px; border: none; cursor: pointer; }
            nav { display: none; }
            nav.active { display: block; }
        }