body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #2c3e50; margin-top: 30px; }
        h1 { font-size: 2.5em; border-bottom: 3px solid #e74c3c; }
        h2 { font-size: 1.8em; border-left: 4px solid #3498db; padding-left: 10px; }
        h3 { font-size: 1.4em; color: #8e44ad; }
        .logo { font-size: 2em; font-weight: bold; color: #e74c3c; text-shadow: 2px 2px 4px rgba(0,0,0,0.2); margin: 20px 0; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; margin: 15px 0; background: #2ecc71; color: white; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .login-btn { background: #3498db; }
        .nav-mobile { display: none; background: #2c3e50; color: white; padding: 10px; text-align: center; cursor: pointer; }
        .nav-links { display: flex; justify-content: space-around; background: #2c3e50; padding: 15px 0; }
        .nav-links a { color: white; text-decoration: none; font-weight: bold; }
        .image-container { text-align: center; margin: 25px 0; }
        .image-container img { max-width: 100%; height: auto; border: 2px solid #ddd; }
        .tag-container { margin: 20px 0; }
        .tag { display: inline-block; background: #95a5a6; color: white; padding: 5px 10px; margin: 5px; border-radius: 3px; }
        .footer { margin-top: 40px; padding: 20px; background: #2c3e50; color: white; text-align: center; }
        @media (max-width: 768px) {
            .nav-links { flex-direction: column; display: none; }
            .nav-mobile { display: block; }
            body { padding: 10px; }
        }