body { font-family: 'Arial', sans-serif; line-height: 1.6; max-width: 1000px; margin: 0 auto; padding: 20px; color: #333; }
        h1 { color: #8B4513; text-align: center; }
        h2 { color: #A0522D; border-bottom: 2px solid #F4A460; }
        h3 { color: #CD853F; }
        .logo { font-size: 2em; font-weight: bold; text-align: center; margin: 20px 0; }
        .nav { background-color: #F5DEB3; padding: 10px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        .nav a { color: #8B4513; text-decoration: none; font-weight: bold; }
        .mobile-nav-btn { display: none; background: #8B4513; color: white; padding: 10px; border: none; cursor: pointer; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .download-btn, .login-btn { background: #4CAF50; color: white; padding: 10px 20px; text-decoration: none; display: inline-block; margin: 10px 0; }
        .login-btn { background: #2196F3; }
        footer { margin-top: 30px; padding: 20px; background: #F5F5DC; }
        @media (max-width: 768px) {
            .nav { display: none; }
            .mobile-nav-btn { display: block; }
            .nav.active { display: flex; }
        }