:root {
            --primary-green: #4CAF50;
            --zombie-green: #8BC34A;
            --dark-green: #2E7D32;
            --soil-brown: #8D6E63;
            --sun-yellow: #FFEB3B;
            --brain-red: #F44336;
            --text-dark: #333;
            --text-light: #f5f5f5;
            --bg-light: #f9f9f9;
            --bg-card: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            background-image: linear-gradient(to bottom, #e8f5e9 0%, var(--bg-light) 100%);
            min-height: 100vh;
        }
        a {
            color: var(--dark-green);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--brain-red);
            text-decoration: underline;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-green) 0%, var(--primary-green) 100%);
            color: var(--text-light);
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Comic Sans MS', cursive, sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--sun-yellow);
            text-shadow: 2px 2px 0 var(--brain-red);
            letter-spacing: 1px;
        }
        .my-logo:hover {
            text-decoration: none;
            transform: scale(1.05);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--text-light);
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--sun-yellow);
            text-decoration: none;
            border-bottom-color: var(--sun-yellow);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--soil-brown);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .content-main {
            background-color: var(--bg-card);
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .sidebar {
            background-color: var(--bg-card);
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            color: var(--dark-green);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--sun-yellow);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--dark-green);
            font-size: 1.8rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid var(--brain-red);
        }
        h3 {
            color: var(--soil-brown);
            font-size: 1.4rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--primary-green);
            font-size: 1.1rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.1rem;
            background: linear-gradient(to right, #e8f5e9, transparent);
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 2rem;
            border-left: 4px solid var(--primary-green);
        }
        .highlight {
            background-color: #fff9c4;
            padding: 1rem;
            border-radius: 8px;
            border: 1px dashed var(--sun-yellow);
            margin: 1.5rem 0;
        }
        .key-term {
            font-weight: 700;
            color: var(--brain-red);
            font-style: italic;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 1.5rem auto;
            border-radius: 8px;
            box-shadow: var(--shadow);
            border: 3px solid var(--soil-brown);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -0.5rem;
            margin-bottom: 1.5rem;
        }
        .last-updated {
            background-color: #e3f2fd;
            padding: 0.8rem;
            border-radius: 6px;
            margin: 2rem 0;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-box, .comment-form, .rating-form {
            background-color: #f5f5f5;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-green);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        button, .btn {
            background: linear-gradient(to right, var(--primary-green), var(--dark-green));
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, var(--dark-green), var(--brain-red));
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            text-decoration: none;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            margin: 0.5rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            margin: 0;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: var(--sun-yellow);
        }
        .widget {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
        }
        .widget:last-child {
            border-bottom: none;
        }
        .widget-title {
            color: var(--dark-green);
            font-size: 1.2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--sun-yellow);
        }
        .link-list {
            list-style: none;
        }
        .link-list li {
            margin-bottom: 0.8rem;
            padding-left: 1.2rem;
            position: relative;
        }
        .link-list li:before {
            content: '🌱';
            position: absolute;
            left: 0;
        }
        .site-footer {
            background: linear-gradient(to right, var(--dark-green), #1B5E20);
            color: var(--text-light);
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 1rem;
            text-align: center;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #ccc;
            grid-column: 1 / -1;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 {
                font-size: 2.3rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--dark-green);
                padding: 1rem;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .content-main {
                padding: 1.5rem;
            }
            .header-container {
                padding: 0 1rem;
            }
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        .card-hover {
            transition: var(--transition);
        }
        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }