body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #e74c3c; margin: 25px 0 15px; }
        h1 { font-size: 2.2em; }
        h2 { font-size: 1.8em; }
        h3 { font-size: 1.4em; }
        .logo { font-size: 2.5em; font-weight: bold; color: #e74c3c; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); }
        nav { background: #f8f8f8; padding: 15px; margin-bottom: 20px; }
        nav ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; }
        nav li { margin: 0 15px; }
        nav a { text-decoration: none; color: #e74c3c; font-weight: bold; }
        .mobile-nav-btn { display: none; background: #e74c3c; color: white; border: none; padding: 10px; cursor: pointer; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .btn { display: inline-block; background: #e74c3c; color: white; padding: 12px 25px; margin: 10px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .download-btn { background: #27ae60; }
        .login-btn { background: #3498db; }
        footer { background: #f8f8f8; padding: 20px; margin-top: 30px; text-align: center; }
        @media (max-width: 768px) {
            nav ul { flex-direction: column; align-items: center; display: none; }
            .mobile-nav-btn { display: block; margin: 0 auto 20px; }
            nav.active ul { display: flex; }
            h1 { font-size: 1.8em; }
        }