:root {
            --primary: #2a6e3f;
            --primary-dark: #1e4f2d;
            --secondary: #d4a017;
            --light: #f8f9fa;
            --dark: #343a40;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            white-space: nowrap;
            border: 0;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            padding: 15px 0;
            border-bottom: 1px solid #eee;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            display: inline-block;
            font-family: 'Georgia', serif;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
        }
        .my-logo:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        .header-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav a {
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 0;
            position: relative;
        }
        nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: width 0.3s ease;
        }
        nav a:hover:after,
        nav a.active:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark);
            cursor: pointer;
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-form input {
            flex: 1;
            padding: 10px 15px;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .breadcrumb {
            padding: 15px 0;
            background: #f1f8ff;
            font-size: 0.95rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child):after {
            content: '›';
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        main {
            flex: 1;
            padding: 30px 0 50px;
        }
        article {
            background: white;
            border-radius: 12px;
            box-shadow: var(--shadow);
            padding: 40px;
            margin-bottom: 30px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
            line-height: 1.2;
            text-align: center;
        }
        .article-meta {
            text-align: center;
            color: var(--gray);
            margin-bottom: 40px;
            font-size: 0.95rem;
            border-bottom: 1px dashed #eee;
            padding-bottom: 20px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--primary-dark);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        em {
            color: var(--secondary);
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid var(--secondary);
            padding-left: 20px;
            margin: 25px 0;
            font-style: italic;
            color: #555;
            background: #f9f9f9;
            padding: 20px;
            border-radius: 0 8px 8px 0;
        }
        .image-container {
            margin: 30px 0;
            text-align: center;
        }
        .article-img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .article-img:hover {
            transform: scale(1.02);
        }
        .img-caption {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 10px;
            font-style: italic;
        }
        .content-highlight {
            background: linear-gradient(90deg, #e3f2fd, #f3e5f5);
            padding: 25px;
            border-radius: 10px;
            margin: 30px 0;
            border-left: 5px solid var(--secondary);
        }
        .tip-box {
            background: #fff8e1;
            padding: 20px;
            border-radius: 8px;
            margin: 25px 0;
            border: 1px dashed #ffd54f;
        }
        .tip-box:before {
            content: '💡';
            margin-right: 10px;
            font-size: 1.2rem;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 10px;
        }
        .interactive-section {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 30px;
            margin: 40px 0;
            border: 1px solid #e9ecef;
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .rating-form, .comment-form {
            display: grid;
            gap: 15px;
            margin-top: 20px;
        }
        .stars {
            display: flex;
            gap: 5px;
            direction: rtl;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star:hover ~ .star {
            color: #ffc107;
        }
        input, textarea, select {
            padding: 12px;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            width: 100%;
        }
        button[type="submit"] {
            background: var(--primary);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            justify-self: start;
        }
        button[type="submit"]:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: var(--secondary);
            font-size: 1.4rem;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 10px 0;
            padding: 8px 0;
            border-bottom: 1px dashed #555;
        }
        friend-link a {
            color: #a3d9ff;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            article { padding: 30px; }
        }
        @media (max-width: 768px) {
            .header-bottom nav {
                position: fixed;
                top: 90px;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: var(--shadow);
                padding: 20px;
                transform: translateY(-150%);
                opacity: 0;
                transition: transform 0.4s ease, opacity 0.4s ease;
                z-index: 999;
            }
            .header-bottom nav.active {
                transform: translateY(0);
                opacity: 1;
            }
            nav ul {
                flex-direction: column;
                gap: 15px;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                max-width: 100%;
                margin-top: 15px;
            }
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 576px) {
            html { font-size: 14px; }
            .container { padding: 0 15px; }
            h1 { font-size: 2rem; }
            article { padding: 20px; }
            .interactive-section { padding: 20px; }
        }