body { font-family: 'Arial', sans-serif; line-height: 1.6; margin: 0; padding: 0; color: #333; background-color: #f5f5f5; }
        header { background-color: #1a237e; color: white; padding: 1rem; text-align: center; position: relative; }
        header h1 { margin: 0; font-size: 2rem; }
        .logo-text { font-weight: bold; font-size: 1.5rem; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        nav { display: flex; justify-content: center; gap: 1.5rem; margin-top: 1rem; }
        nav a { color: white; text-decoration: none; font-weight: bold; }
        .mobile-menu-btn { display: none; position: absolute; top: 1rem; right: 1rem; background: none; border: none; color: white; font-size: 1.5rem; cursor: pointer; }
        .container { max-width: 1200px; margin: 0 auto; padding: 1rem; }
        .content-section { background-color: white; margin-bottom: 2rem; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
        h2 { color: #1a237e; border-bottom: 2px solid #1a237e; padding-bottom: 0.5rem; margin-top: 2rem; }
        h3 { color: #303f9f; margin-top: 1.5rem; }
        .btn { display: inline-block; background-color: #1a237e; color: white; padding: 0.7rem 1.5rem; text-decoration: none; border-radius: 4px; margin: 0.5rem 0; font-weight: bold; }
        .download-btn { background-color: #4caf50; }
        .login-btn { background-color: #2196f3; }
        .stats-highlight { background-color: #e3f2fd; padding: 1rem; border-left: 4px solid #2196f3; margin: 1rem 0; }
        footer { background-color: #1a237e; color: white; text-align: center; padding: 1.5rem; }
        footer a { color: #bbdefb; text-decoration: none; }
        .tag-cloud { margin: 1.5rem 0; }
        .tag-cloud a { display: inline-block; background-color: #303f9f; color: white; padding: 0.3rem 0.7rem; margin: 0.2rem; border-radius: 15px; font-size: 0.9rem; }
        @media (max-width: 768px) {
            .mobile-menu-btn { display: block; }
            nav { display: none; flex-direction: column; align-items: center; background-color: #1a237e; position: absolute; top: 4rem; left: 0; right: 0; padding: 1rem; }
            nav.active { display: flex; }
            nav a { margin: 0.5rem 0; }
            header h1 { font-size: 1.5rem; }
            .logo-text { font-size: 1.2rem; }
        }