* { 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: #f8f9fa;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a { color: #1a73e8; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #0d47a1; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            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: 1.8rem;
            font-weight: 800;
            color: #1a5fb4;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #30d158; }
        .my-logo:hover { text-decoration: none; }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-desktop a {
            font-weight: 600;
            color: #444;
            padding: 5px 0;
            position: relative;
        }
        .nav-desktop a:hover:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: #30d158;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: #444;
        }
        .nav-mobile {
            display: none;
            background: #fff;
            padding: 20px;
            border-top: 1px solid #eee;
        }
        .nav-mobile.active { display: block; }
        .nav-mobile ul { list-style: none; }
        .nav-mobile li { margin-bottom: 15px; }
        .nav-mobile a {
            display: block;
            padding: 10px;
            background: #f5f5f5;
            border-radius: 5px;
            font-weight: 600;
        }
        .breadcrumb {
            padding: 15px 20px;
            background: #edf2f7;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb span { color: #888; }
        main { flex: 1; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 20px;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        .article-main {
            background: #fff;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .article-header { margin-bottom: 30px; }
        .article-header h1 {
            font-size: 2.8rem;
            color: #1a5fb4;
            line-height: 1.2;
            margin-bottom: 15px;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: #666;
            font-size: 0.95rem;
            border-bottom: 1px solid #eee;
            padding-bottom: 15px;
        }
        .meta-info span i { margin-right: 5px; }
        .search-box {
            background: #f1f8ff;
            padding: 25px;
            border-radius: 10px;
            margin: 25px 0;
            text-align: center;
        }
        .search-box h3 { margin-bottom: 15px; color: #1a5fb4; }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #1a73e8;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background: #1a73e8;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-form button:hover { background: #0d47a1; }
        .article-body h2 {
            font-size: 2rem;
            color: #2d3748;
            margin: 35px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e2e8f0;
        }
        .article-body h3 {
            font-size: 1.6rem;
            color: #4a5568;
            margin: 30px 0 15px;
        }
        .article-body h4 {
            font-size: 1.3rem;
            color: #718096;
            margin: 25px 0 10px;
        }
        .article-body p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            color: #2d3748;
            text-align: justify;
        }
        .article-body strong { color: #1a5fb4; }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-left: 5px solid #1a73e8;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .wordle-grid {
            display: inline-grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 8px;
            margin: 15px;
        }
        .letter-cell {
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 800;
            border: 2px solid #d1d9e6;
            border-radius: 5px;
            background: #f8f9fa;
        }
        .correct { background: #30d158; color: white; border-color: #30d158; }
        .present { background: #ffcc00; color: white; border-color: #ffcc00; }
        .absent { background: #787c7e; color: white; border-color: #787c7e; }
        .rating-section, .comments-section {
            background: #f9f9f9;
            padding: 25px;
            border-radius: 10px;
            margin-top: 40px;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 15px;
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars .active { color: #ffcc00; }
        .form-group input, .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
        }
        .submit-btn {
            background: #30d158;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            align-self: flex-start;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: #2ca84c; }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .sidebar-widget {
            background: #fff;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            color: #1a5fb4;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #e2e8f0;
        }
        .related-links ul { list-style: none; }
        .related-links li { margin-bottom: 12px; }
        .related-links a { display: block; padding: 8px 0; }
        .related-links a:before { content: "🔗"; margin-right: 8px; }
        .site-footer {
            background: #2d3748;
            color: #cbd5e0;
            padding: 40px 20px 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-widget h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        friend-link {
            display: block;
            margin-bottom: 10px;
            color: #90cdf4;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            .header-container { padding: 12px 15px; }
            .nav-desktop { display: none; }
            .hamburger { display: block; }
            .content-wrapper, .article-main { padding: 20px; }
            .article-header h1 { font-size: 2.2rem; }
            .meta-info { flex-direction: column; gap: 10px; }
            .footer-container { grid-template-columns: 1fr; }
        }