:root {
            --primary: #2E86C1;
            --secondary: #1ABC9C;
            --accent: #E74C3C;
            --dark: #2C3E50;
            --light: #ECF0F1;
            --gray: #7F8C8D;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 12px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol {
            list-style-position: inside;
            margin-left: 1rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            box-shadow: var(--shadow);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
            background: linear-gradient(135deg, var(--secondary), var(--primary));
        }
        .section-padding {
            padding: 80px 0;
        }
        .site-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;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: -1px;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: var(--accent);
            margin-right: 10px;
        }
        .my-logo:hover {
            color: var(--secondary);
        }
        .main-nav ul {
            display: flex;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 8px 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 15px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 8px;
        }
        .hero {
            background: linear-gradient(rgba(44, 62, 80, 0.9), rgba(44, 62, 80, 0.8)), url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
            padding: 100px 20px;
            border-bottom-left-radius: 40px;
            border-bottom-right-radius: 40px;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 35px;
            opacity: 0.95;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 40px auto;
        }
        .article-content {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .widget {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget h3 {
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary);
            color: var(--dark);
        }
        h1, h2, h3, h4 {
            color: var(--dark);
            margin-top: 1.8em;
            margin-bottom: 0.7em;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
        }
        h2 {
            font-size: 2.2rem;
            color: var(--secondary);
            border-left: 6px solid var(--accent);
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary);
        }
        h4 {
            font-size: 1.4rem;
            color: var(--dark);
        }
        p {
            margin-bottom: 1.5em;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--dark);
            background: var(--light);
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--primary);
        }
        .highlight {
            background-color: #fffacd;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .article-content a {
            color: var(--primary);
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
        }
        .article-content a:hover {
            color: var(--accent);
            border-bottom-style: solid;
        }
        .img-container {
            margin: 30px 0;
            text-align: center;
        }
        .img-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .functional-form {
            background: var(--light);
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 30px 0;
        }
        .functional-form h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--light);
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.1);
            padding: 15px;
            margin-bottom: 10px;
            border-radius: 8px;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255,255,255,0.2);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #bbb;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 80%;
                height: calc(100vh - 80px);
                background: white;
                box-shadow: var(--shadow);
                transition: left 0.4s ease;
                padding: 30px;
                overflow-y: auto;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 20px;
            }
            .hero {
                padding: 70px 20px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .section-padding {
                padding: 50px 0;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .article-content {
                padding: 25px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.9rem;
            }
            .btn {
                padding: 10px 22px;
            }
        }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 30px; }
        .mt-3 { margin-top: 30px; }
        .last-updated {
            font-style: italic;
            color: var(--gray);
            font-size: 0.9rem;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px dashed #ddd;
        }