:root {
            --primary-color: #0055B8; 
            --secondary-color: #FFCC00; 
            --accent-color: #E41F13; 
            --dark-bg: #1a1a2e;
            --light-bg: #f8f9fa;
            --text-dark: #212529;
            --text-light: #e9ecef;
            --gray-border: #dee2e6;
            --spacing-unit: 1rem;
            --border-radius: 8px;
            --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: var(--text-dark);
            background-color: var(--light-bg);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 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 var(--spacing-unit);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary-color);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo a:hover {
            color: white;
            transform: scale(1.02);
            transition: var(--transition);
        }
        .logo i {
            font-size: 2.2rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .main-nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: var(--secondary-color);
            color: var(--dark-bg);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 0.8rem auto;
            padding: 0 var(--spacing-unit);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content {
            flex: 1;
            max-width: 1200px;
            width: 100%;
            margin: 2rem auto;
            padding: 0 var(--spacing-unit);
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--secondary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--accent-color);
            font-size: 2rem;
            margin: 2rem 0 1rem;
            padding-top: 1rem;
        }
        h3 {
            color: var(--dark-bg);
            font-size: 1.5rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-color);
            background: #f0f8ff;
            padding: 1.2rem;
            border-left: 5px solid var(--secondary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 1.5rem auto;
            display: block;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .content-img:hover {
            transform: scale(1.01);
        }
        figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
        }
        .internal-link {
            color: var(--accent-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--accent-color);
        }
        .internal-link:hover {
            border-bottom-style: solid;
            color: #b31217;
        }
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: linear-gradient(to bottom right, #ffffff, #f1f8ff);
            border: 1px solid var(--gray-border);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,85,184,0.1);
        }
        .feature-card i {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            color: var(--primary-color);
            border-bottom: 2px solid var(--gray-border);
            padding-bottom: 0.5rem;
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid var(--gray-border);
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #004099;
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: var(--gray-border);
            margin: 0.5rem 0;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover,
        .stars i.active {
            color: var(--secondary-color);
        }
        .rating-widget input,
        .rating-widget textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid var(--gray-border);
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .rating-widget button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 0.8rem;
            border-radius: var(--border-radius);
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-widget button:hover {
            background-color: #c2181b;
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: var(--secondary-color);
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid #444;
            grid-column: 1 / -1;
        }
        friend-link h4 {
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .friend-links a {
            background: rgba(255,255,255,0.1);
            color: #ccc;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
        }
        .friend-links a:hover {
            background: var(--primary-color);
            color: white;
        }
        .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .main-nav ul {
                gap: 1rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--dark-bg);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            .main-nav.active ul {
                display: flex;
            }
            .header-container {
                flex-wrap: wrap;
            }
            h1 {
                font-size: 2.2rem;
            }
            article {
                padding: 1.5rem;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .bold {
            font-weight: 800;
            color: var(--primary-color);
        }
        .text-center {
            text-align: center;
        }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }