* { 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: #333;
            background-color: #f5f5f5;
            max-width: 100%;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 { font-family: Georgia, 'Times New Roman', Times, serif; color: #2c3e50; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.8rem; border-bottom: 4px solid #c0392b; padding-bottom: 0.5rem; margin-top: 1.5rem; }
        h2 { font-size: 2.2rem; color: #2980b9; padding-left: 0.5rem; border-left: 5px solid #e74c3c; margin-top: 2.5rem; }
        h3 { font-size: 1.8rem; color: #16a085; margin-top: 2rem; }
        h4 { font-size: 1.4rem; color: #8e44ad; margin-top: 1.5rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e74c3c; }
        strong { color: #c0392b; font-weight: 700; }
        em { font-style: italic; color: #7f8c8d; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            padding: 1.2rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            letter-spacing: 2px;
            color: #e74c3c;
            text-shadow: 2px 2px 0 #000;
            text-decoration: none;
        }
        .my-logo:hover { color: #fff; }
        .breadcrumb {
            background: #ecf0f1;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            color: #7f8c8d;
            margin-bottom: 2rem;
        }
        .breadcrumb a { color: #3498db; }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb i { margin: 0 0.5rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li { margin-left: 2rem; }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #e74c3c;
            transition: width 0.3s ease;
        }
        .main-nav a:hover:after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #2c3e50;
                display: none;
                padding: 1rem 0;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active ul { display: flex; }
            .main-nav li { margin: 0; text-align: center; padding: 0.8rem 0; border-bottom: 1px solid #3a506b; }
        }
        .search-box {
            display: flex;
            margin: 2rem 0 3rem;
            max-width: 600px;
        }
        .search-box input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #3498db;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-box button {
            background: #3498db;
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-box button:hover { background: #2980b9; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .article-meta {
            color: #7f8c8d;
            font-size: 0.95rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #ddd;
        }
        .article-meta i { margin-right: 0.5rem; }
        .featured-image {
            width: 100%;
            margin: 2rem 0;
            text-align: center;
        }
        .featured-image img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            border: 1px solid #ddd;
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .content-link {
            background: #f8f9fa;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            border-left: 3px solid #3498db;
            font-weight: 600;
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: #2c3e50;
            border-bottom: 2px solid #e74c3c;
            padding-bottom: 0.5rem;
            margin-bottom: 1.2rem;
        }
        .related-links ul { list-style: none; }
        .related-links li { margin-bottom: 0.9rem; padding-left: 1rem; border-left: 3px solid #ecf0f1; transition: border-color 0.3s; }
        .related-links li:hover { border-left-color: #3498db; }
        .user-interaction { margin-top: 4rem; background: #f8f9fa; padding: 2rem; border-radius: 8px; }
        .interaction-title { margin-bottom: 1.5rem; color: #2c3e50; }
        .form-group { margin-bottom: 1.5rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #555; }
        .form-control {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 4px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus { border-color: #3498db; outline: none; }
        textarea.form-control { min-height: 120px; resize: vertical; }
        .rating-stars { font-size: 1.8rem; color: #f1c40f; margin: 0.5rem 0; }
        .rating-stars i { cursor: pointer; margin-right: 0.3rem; transition: transform 0.2s; }
        .rating-stars i:hover { transform: scale(1.2); }
        .submit-btn {
            background: #27ae60;
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: #219653; }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-widget h4 {
            color: #e74c3c;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3a506b;
        }
        friend-link {
            display: block;
            background: #34495e;
            margin: 1rem 0;
            padding: 1rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        friend-link:hover { background: #3a506b; }
        friend-link a { color: #ecf0f1; font-weight: 600; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #3a506b;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-3 { margin-top: 3rem; }
        .highlight { background: #fffacd; padding: 0.2rem 0.5rem; border-radius: 3px; }
        blockquote {
            border-left: 5px solid #3498db;
            background: #f0f8ff;
            padding: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #2c3e50;
        }
        hr {
            border: none;
            height: 1px;
            background: linear-gradient(to right, transparent, #bdc3c7, transparent);
            margin: 2.5rem 0;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .article-content, .sidebar { padding: 1.5rem; }
            .site-header .container { padding: 0 15px; }
        }