:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --background-color: #f9f9f9;
            --text-color: #333333;
            --light-gray: #ecf0f1;
        }
        
        body {
            font-family: 'Roboto', 'Open Sans', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            margin: 0;
            padding: 0;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        main {
            padding-top: 80px;
            padding-bottom: 60px;
        }
        
        h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 1rem;
            text-align: center;
        }
        
        h2 {
            color: var(--secondary-color);
            font-size: 1.8rem;
            margin-top: 2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light-gray);
        }
        
        .last-updated {
            text-align: center;
            color: var(--text-color);
            font-style: italic;
            margin-bottom: 2rem;
        }
        
        section {
            margin-bottom: 2.5rem;
        }
        
        .nav-container {
            background-color: var(--light-gray);
            padding: 1rem;
            border-radius: 5px;
            margin-bottom: 2rem;
        }
        
        .section-nav {
            list-style-type: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        
        .section-nav li a {
            text-decoration: none;
            color: var(--secondary-color);
            padding: 8px 12px;
            border-radius: 4px;
            transition: background-color 0.3s;
        }
        
        .section-nav li a:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        
        p {
            margin-bottom: 1rem;
        }
        
        ul {
            margin-bottom: 1rem;
        }
        
        li {
            margin-bottom: 0.5rem;
        }