:root {
            --primary-color: #8B4513;
            --secondary-color: #D2691E;
            --accent-color: #FFD700;
            --text-color: #2F4F4F;
            --light-bg: #FFF8DC;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--text-color);
            background-color: var(--light-bg);
            line-height: 1.7;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        h1 {
            border-bottom: 2px solid var(--secondary-color);
            padding-bottom: 0.5rem;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-color);
        }
        .section-highlight {
            background-color: rgba(210, 105, 30, 0.1);
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-icon {
            color: var(--secondary-color);
            font-size: 1.5rem;
            margin-right: 0.5rem;
        }
        .img-container {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            margin: 2rem 0;
        }
        .img-container img {
            transition: transform 0.5s ease;
        }
        .img-container:hover img {
            transform: scale(1.03);
        }
        .key-term {
            font-weight: bold;
            color: var(--primary-color);
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .nav-link {
            color: var(--text-color);
            font-weight: 500;
        }
        .nav-link:hover, .nav-link:focus {
            color: var(--secondary-color);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        @media (max-width: 768px) {
            .navbar-brand {
                font-size: 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            .lead {
                font-size: 1.1rem;
            }
        }