:root {
            --primary-green: #4CAF50;
            --dark-green: #2E7D32;
            --light-green: #C8E6C9;
            --accent-orange: #FF9800;
            --text-dark: #333333;
            --text-light: #666666;
            --bg-light: #f9f9f9;
            --border-color: #e0e0e0;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Arial', 'Helvetica Neue', sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.8;
            color: var(--text-dark);
            background-color: white;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--dark-green);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-orange);
        }
        ul, ol {
            padding-left: 1.5em;
            margin: 1em 0;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .skip-link {
            position: absolute;
            top: -50px;
            left: 10px;
            background: var(--primary-green);
            color: white;
            padding: 10px;
            z-index: 1001;
            border-radius: 4px;
        }
        .skip-link:focus {
            top: 10px;
        }
        .site-header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-green);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-orange);
        }
        .my-logo:hover {
            color: var(--dark-green);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            border-bottom-color: var(--accent-orange);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-dark);
        }
        .breadcrumb {
            background: var(--bg-light);
            padding: 12px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding: 0;
            margin: 0;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: var(--text-light);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 20px;
        }
        article {
            max-width: 900px;
        }
        .article-header {
            margin-bottom: 2.5em;
            border-bottom: 3px solid var(--light-green);
            padding-bottom: 1.5em;
        }
        h1 {
            font-family: var(--font-heading);
            font-size: clamp(2.2rem, 5vw, 3.2rem);
            line-height: 1.2;
            margin-bottom: 0.5em;
            color: var(--dark-green);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-top: 1em;
        }
        .last-updated {
            background: var(--light-green);
            padding: 5px 10px;
            border-radius: 4px;
        }
        h2, h3, h4 {
            font-family: var(--font-heading);
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            color: var(--dark-green);
        }
        h2 {
            font-size: 2rem;
            border-left: 5px solid var(--accent-orange);
            padding-left: 15px;
        }
        h3 {
            font-size: 1.6rem;
        }
        h4 {
            font-size: 1.3rem;
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: bold;
            color: var(--text-dark);
            background: var(--bg-light);
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 2em;
            border-left: 4px solid var(--primary-green);
        }
        .highlight {
            background-color: #fff9c4;
            padding: 2px 5px;
            border-radius: 3px;
            font-weight: bold;
        }
        blockquote {
            border-left: 4px solid var(--primary-green);
            padding-left: 20px;
            margin: 2em 0;
            font-style: italic;
            color: var(--text-light);
        }
        .feature-img {
            width: 100%;
            margin: 2.5em auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 8px;
            font-style: italic;
        }
        aside {
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            background: var(--bg-light);
            padding: 25px;
            border-radius: 10px;
            margin-bottom: 30px;
            border: 1px solid var(--border-color);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            margin-bottom: 1em;
            color: var(--dark-green);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form {
            display: flex;
            margin-top: 1em;
        }
        .search-form input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-right: none;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-green);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--dark-green);
        }
        .user-interaction {
            margin-top: 4em;
            padding-top: 3em;
            border-top: 2px dashed var(--border-color);
        }
        .form-group {
            margin-bottom: 1.5em;
        }
        label {
            display: block;
            margin-bottom: 0.5em;
            font-weight: 600;
        }
        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-family: var(--font-body);
            font-size: 1rem;
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin: 10px 0;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: #FFD700;
        }
        .submit-btn {
            background: var(--primary-green);
            color: white;
            border: none;
            padding: 14px 30px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 6px;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background: var(--dark-green);
            transform: translateY(-2px);
        }
        .site-footer {
            background: #2a2a2a;
            color: #ccc;
            padding: 50px 20px 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.2em;
            border-bottom: 2px solid var(--primary-green);
            padding-bottom: 8px;
            display: inline-block;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #aaa;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: #333;
            padding: 15px;
            border-radius: 6px;
            margin-bottom: 10px;
            border-left: 4px solid var(--primary-green);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
                order: -1;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 15px;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #eee;
            }
            .main-nav a {
                display: block;
                padding: 12px 0;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .content-wrapper, .header-container {
                padding-left: 15px;
                padding-right: 15px;
            }
        }