* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: 'Georgia', serif; color: #2c3e50; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); margin-top: 1.5rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-top: 2.5rem; border-bottom: 2px solid #eaeaea; padding-bottom: 0.5rem; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin-top: 2rem; color: #3498db; }
        h4 { font-size: 1.3rem; margin-top: 1.5rem; color: #7f8c8d; }
        p { margin-bottom: 1.5rem; text-align: justify; hyphens: auto; }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        strong { color: #2c3e50; }
        em { font-style: italic; color: #555; }
        blockquote { border-left: 4px solid #3498db; padding-left: 1.5rem; margin: 2rem 0; font-style: italic; color: #555; }
        ul, ol { margin: 1.5rem 0; padding-left: 2rem; }
        li { margin-bottom: 0.8rem; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .main-content { display: grid; grid-template-columns: 1fr; gap: 2.5rem; }
        @media (min-width: 992px) {
            .main-content { grid-template-columns: 3fr 1fr; }
        }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #4a148c 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #00e5ff; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { color: #00e5ff; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #00e5ff;
            transition: width 0.3s;
        }
        .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 {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: #1a237e;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
                z-index: 999;
                padding: 2rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f8ff;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #7f8c8d;
        }
        .breadcrumb a { color: #3498db; }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }
        .featured-image {
            width: 100%;
            border-radius: 10px;
            overflow: hidden;
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }
        .featured-image img { width: 100%; object-fit: cover; }
        .interactive-module {
            background: #f8f9fa;
            border-left: 5px solid #3498db;
            padding: 1.5rem;
            margin: 2.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .module-title { color: #2c3e50; margin-bottom: 1rem; }
        .styled-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        .form-group { display: flex; flex-direction: column; }
        .form-label { margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        .form-input, .form-textarea, .form-select {
            padding: 0.8rem 1rem;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .form-textarea { min-height: 120px; resize: vertical; }
        .btn {
            padding: 0.8rem 1.8rem;
            background: #3498db;
            color: white;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            align-self: flex-start;
        }
        .btn:hover {
            background: #2980b9;
            transform: translateY(-2px);
        }
        .btn:active { transform: translateY(0); }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            direction: rtl;
        }
        .star-rating input { display: none; }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #f39c12; }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-title {
            font-size: 1.3rem;
            color: #2c3e50;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3498db;
            margin-bottom: 1.2rem;
        }
        .link-list { list-style: none; padding: 0; }
        .link-list li { margin-bottom: 0.8rem; }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.6rem;
            border-radius: 6px;
            transition: background 0.3s;
        }
        .link-list a:hover { background: #f1f8ff; }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-widget h3 { color: #ecf0f1; border-bottom: none; font-size: 1.4rem; }
        friend-link {
            display: block;
            padding: 1rem;
            background: rgba(255,255,255,0.05);
            border-radius: 6px;
            margin: 0.5rem 0;
            transition: background 0.3s;
        }
        friend-link:hover { background: rgba(255,255,255,0.1); }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        .text-center { text-align: center; }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .highlight { background: #fffacd; padding: 0.2rem 0.5rem; border-radius: 3px; }
        .last-updated { font-size: 0.9rem; color: #7f8c8d; font-style: italic; margin-top: 2rem; }