* { 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: #e0e0e0;
            background: #0a0a12;
            background-image: radial-gradient(circle at 15% 20%, rgba(41, 50, 85, 0.2) 0%, transparent 20%),
                              radial-gradient(circle at 85% 30%, rgba(25, 25, 60, 0.15) 0%, transparent 20%);
            min-height: 100vh;
        }
        a { color: #5d9cec; text-decoration: none; transition: color 0.3s, text-shadow 0.3s; }
        a:hover { color: #ffcc00; text-shadow: 0 0 8px rgba(255, 204, 0, 0.6); }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .site-header {
            background: rgba(10, 10, 20, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1a1a2e;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.5rem;
            font-weight: bold;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 3px;
            text-shadow: 0 0 10px #0055ff, 0 0 20px #0055ff, 2px 2px 0 #000;
            position: relative;
            padding-left: 10px;
        }
        .my-logo::before {
            content: '🦇';
            position: absolute;
            left: -25px;
            top: 5px;
            font-size: 1.8rem;
        }
        .my-logo a { color: inherit; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            color: #ccc;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            font-size: 1.05rem;
        }
        .main-nav a:hover, .main-nav a:focus {
            background: rgba(255, 204, 0, 0.15);
            color: #ffcc00;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #aaa;
            border-bottom: 1px solid #222233;
            margin-bottom: 30px;
        }
        .breadcrumb a { color: #aaa; }
        .breadcrumb a:hover { color: #ffcc00; }
        .breadcrumb span { color: #ffcc00; }
        .content-main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0;
        }
        @media (max-width: 992px) {
            .content-main { grid-template-columns: 1fr; }
        }
        article { background: rgba(20, 20, 35, 0.8); border-radius: 12px; padding: 30px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); }
        .sidebar {
            background: rgba(25, 25, 45, 0.8);
            border-radius: 12px;
            padding: 25px;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1, h2, h3, h4 {
            color: #ffcc00;
            font-family: 'Georgia', 'Times New Roman', serif;
            margin-top: 1.5em;
            margin-bottom: 0.7em;
            line-height: 1.3;
            text-shadow: 1px 1px 3px #000;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid #333355;
            padding-bottom: 15px;
            margin-top: 0;
        }
        h2 { font-size: 2.2rem; border-left: 5px solid #0055ff; padding-left: 15px; }
        h3 { font-size: 1.8rem; color: #5d9cec; }
        h4 { font-size: 1.5rem; color: #a3d4ff; }
        p {
            margin-bottom: 1.5em;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: #b8d4ff;
            font-style: italic;
            border-left: 4px solid #ffcc00;
            padding-left: 20px;
            margin: 25px 0;
        }
        .highlight {
            background: linear-gradient(90deg, rgba(255,204,0,0.1), transparent);
            padding: 15px;
            border-radius: 8px;
            border-left: 4px solid #ffcc00;
            margin: 20px 0;
        }
        .key-term {
            font-weight: bold;
            color: #ffcc00;
            font-style: italic;
        }
        .quote {
            font-family: 'Courier New', monospace;
            color: #88ffaa;
            background: rgba(0, 40, 20, 0.3);
            padding: 20px;
            border-radius: 8px;
            margin: 25px 0;
            border-left: 5px solid #00aa55;
        }
        ul, ol { margin-left: 25px; margin-bottom: 1.5em; }
        li { margin-bottom: 0.5em; }
        .article-img {
            margin: 30px auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.7);
            border: 2px solid #333355;
            max-width: 800px;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #aaa;
            margin-top: 8px;
            font-size: 0.95rem;
        }
        .module {
            background: rgba(30, 30, 50, 0.6);
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 30px;
            border: 1px solid #333355;
        }
        .module h3 { margin-top: 0; }
        .form-group { margin-bottom: 20px; }
        label { display: block; margin-bottom: 8px; color: #ccc; font-weight: 600; }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            background: rgba(10, 15, 30, 0.8);
            border: 1px solid #444466;
            border-radius: 6px;
            color: #fff;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #ffcc00;
            box-shadow: 0 0 0 3px rgba(255, 204, 0, 0.2);
        }
        button, .btn {
            background: linear-gradient(to bottom, #ffcc00, #cc9900);
            color: #000;
            border: none;
            padding: 12px 25px;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            font-size: 1rem;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-block;
        }
        button:hover, .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 204, 0, 0.4);
        }
        .rating-stars { display: flex; gap: 10px; margin: 15px 0; }
        .rating-stars i { color: #555; cursor: pointer; font-size: 1.8rem; transition: color 0.2s; }
        .rating-stars i:hover, .rating-stars i.active { color: #ffcc00; }
        .link-box { margin-bottom: 25px; }
        .link-box h4 { border-bottom: 2px solid #333355; padding-bottom: 8px; margin-bottom: 15px; }
        .link-list { list-style: none; margin: 0; }
        .link-list li { margin-bottom: 10px; padding: 12px 15px; background: rgba(40, 40, 65, 0.5); border-radius: 6px; transition: background 0.3s; }
        .link-list li:hover { background: rgba(60, 60, 100, 0.7); }
        .link-list a { display: block; color: #cce0ff; }
        .link-list a:hover { color: #fff; }
        .site-footer {
            background: rgba(5, 5, 15, 0.95);
            border-top: 2px solid #1a1a2e;
            margin-top: 50px;
            padding: 40px 0 20px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h4 { color: #ffcc00; margin-bottom: 20px; }
        friend-link {
            display: block;
            padding: 10px 15px;
            background: rgba(255,255,255,0.05);
            margin-bottom: 10px;
            border-radius: 5px;
            transition: background 0.3s;
        }
        friend-link:hover { background: rgba(255,204,0,0.1); }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #222233;
            color: #777;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-inner { flex-wrap: wrap; }
            .hamburger { display: block; }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
                order: 3;
                margin-top: 15px;
            }
            .main-nav.active { max-height: 300px; }
            .main-nav ul { flex-direction: column; gap: 0; }
            .main-nav li { width: 100%; text-align: center; border-bottom: 1px solid #222233; }
            .main-nav a { display: block; padding: 15px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article, .sidebar { padding: 20px; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in { animation: fadeIn 0.8s ease forwards; }
        .delay-1 { animation-delay: 0.2s; }
        .delay-2 { animation-delay: 0.4s; }