* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #4a6fa5;
            --secondary-color: #ff9800;
            --accent-color: #2ecc71;
            --dark-color: #2c3e50;
            --light-color: #f8f9fa;
            --text-color: #333;
            --text-light: #666;
            --border-color: #e0e0e0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            font-size: 16px;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        h1, h2, h3, h4 {
            color: var(--dark-color);
            margin-bottom: 1rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 15px;
        }
        h1:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100px;
            height: 4px;
            background-color: var(--secondary-color);
            border-radius: 2px;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2.5rem;
            padding-left: 15px;
            border-left: 5px solid var(--primary-color);
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 2rem;
            color: var(--primary-color);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-color);
            margin-bottom: 2rem;
        }
        header {
            background-color: 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;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
            color: var(--secondary-color);
        }
        .logo span {
            color: var(--secondary-color);
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        .desktop-nav a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            position: relative;
        }
        .desktop-nav a:hover {
            color: var(--primary-color);
        }
        .desktop-nav a:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .desktop-nav a:hover:after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: white;
            padding: 20px;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: 12px 0;
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            color: var(--primary-color);
            padding-left: 10px;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 12px 0;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 5px;
            font-size: 0.9rem;
        }
        .breadcrumb li:not(:last-child):after {
            content: '>';
            margin-left: 5px;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 30px 0;
        }
        .article-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .article-content {
                grid-template-columns: 1fr;
            }
        }
        .sidebar {
            margin-top: 30px;
        }
        .sidebar-widget {
            background-color: var(--light-color);
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            font-size: 1.3rem;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-color);
            margin-bottom: 20px;
        }
        .search-form {
            display: flex;
            margin-bottom: 30px;
            background-color: white;
            border-radius: 50px;
            overflow: hidden;
            border: 2px solid var(--border-color);
        }
        .search-form input {
            flex: 1;
            padding: 15px 20px;
            border: none;
            outline: none;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--dark-color);
        }
        .rating-system, .comment-form {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 2px solid var(--border-color);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .rating-stars i {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #ffcc00;
        }
        .rating-form button, .comment-form button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            margin-top: 15px;
        }
        .rating-form button:hover, .comment-form button:hover {
            background-color: #27ae60;
            transform: translateY(-3px);
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            resize: vertical;
            min-height: 120px;
            margin-bottom: 15px;
            font-family: inherit;
        }
        .highlight-box {
            background-color: #f0f7ff;
            border-left: 4px solid var(--primary-color);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box {
            background-color: #fff9e6;
            border: 1px dashed var(--secondary-color);
            padding: 20px;
            margin: 25px 0;
            border-radius: 8px;
        }
        .tip-box:before {
            content: "💡 ";
            font-size: 1.2rem;
            margin-right: 5px;
        }
        .warning-box {
            background-color: #fff0f0;
            border: 1px solid #ff6b6b;
            padding: 20px;
            margin: 25px 0;
            border-radius: 8px;
        }
        .warning-box:before {
            content: "⚠️ ";
            font-size: 1.2rem;
            margin-right: 5px;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 25px 0;
            box-shadow: var(--shadow);
            display: block;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -15px;
            margin-bottom: 30px;
            font-size: 0.9rem;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 25px;
        }
        li {
            margin-bottom: 10px;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            box-shadow: var(--shadow);
            border-radius: 8px;
            overflow: hidden;
        }
        th, td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: var(--light-color);
        }
        tr:hover {
            background-color: #f0f7ff;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin: 40px 0;
        }
        @media (max-width: 768px) {
            .web-links {
                grid-template-columns: 1fr;
            }
        }
        .web-link {
            background-color: var(--light-color);
            padding: 15px;
            border-radius: 5px;
            border-left: 4px solid var(--accent-color);
        }
        .web-link a {
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            display: block;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
        }
        @media (max-width: 992px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.3rem;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-section h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: var(--secondary-color);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .header-container {
                padding: 12px 20px;
            }
        }
        @media (max-width: 576px) {
            body {
                font-size: 15px;
            }
            .container {
                padding: 0 15px;
            }
            .search-form input {
                padding: 12px 15px;
            }
        }
        @media print {
            header, footer, .sidebar, .search-form, .rating-system, .comment-form {
                display: none;
            }
            body {
                font-size: 12pt;
                color: black;
                background: white;
            }
            .container {
                max-width: 100%;
                padding: 0;
            }
            h1, h2, h3 {
                color: black;
            }
        }