:root {
            --primary-color: #5D4037;
            --secondary-color: #8D6E63;
            --accent-color: #D7CCC8;
            --text-color: #3E2723;
            --light-bg: #EFEBE9;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            margin: 0;
            padding: 0;
            background-color: var(--light-bg);
        }
        
        .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(--accent-color);
        }
        
        .update-date {
            text-align: center;
            font-style: italic;
            margin-bottom: 2rem;
            color: var(--secondary-color);
        }
        
        section {
            margin-bottom: 2.5rem;
            background-color: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .nav-container {
            background-color: white;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 2rem;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .section-nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        
        .section-nav a {
            display: inline-block;
            padding: 8px 15px;
            background-color: var(--accent-color);
            color: var(--text-color);
            text-decoration: none;
            border-radius: 4px;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }
        
        .section-nav a:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        
        ul {
            padding-left: 1.5rem;
        }
        
        li {
            margin-bottom: 0.5rem;
        }