* { 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;
            background-image: linear-gradient(to bottom, #f1f3f4, #e9ecef);
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #1a365d; 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: linear-gradient(135deg, #1e3a8a 0%, #2c5aa0 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: 2.2rem;
            font-weight: 800;
            font-family: 'Trebuchet MS', sans-serif;
            background: linear-gradient(to right, #ffd166, #ff9e6d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
        }
        .my-logo:hover { text-decoration: none; opacity: 0.9; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
            color: white;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.75rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a { color: #495057; }
        .breadcrumb a:hover { color: #1e3a8a; }
        .breadcrumb span { color: #6c757d; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 18px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1, h2, h3, h4 {
            color: #1e3a8a;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid #ffd166;
            padding-bottom: 0.5rem;
            margin-top: 0;
        }
        h2 { font-size: 2rem; color: #2c5aa0; }
        h3 { font-size: 1.6rem; color: #3b82f6; }
        h4 { font-size: 1.3rem; color: #6b7280; }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            color: #4b5563;
            font-weight: 500;
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: #f0f9ff;
            border-left: 4px solid #3b82f6;
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background-color: #fff3cd;
            padding: 1.5rem;
            border-left: 5px solid #ffc107;
            border-radius: 5px;
            margin: 2rem 0;
        }
        .emoji { font-size: 1.2em; }
        .form-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            border: 1px solid #dee2e6;
            margin: 2.5rem 0;
        }
        .form-title { margin-top: 0; }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #495057;
        }
        .form-control {
            width: 100%;
            padding: 0.85rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #2c5aa0, #3b82f6);
            color: white;
            padding: 0.9rem 2rem;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11);
        }
        .btn:hover {
            background: linear-gradient(to right, #1e3a8a, #2c5aa0);
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #ffc107; }
        .related-links ul,
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .related-links li,
        .sidebar li {
            padding: 0.75rem 0;
            border-bottom: 1px dashed #e2e8f0;
        }
        .related-links li:last-child,
        .sidebar li:last-child { border-bottom: none; }
        .related-links a,
        .sidebar a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .related-links i,
        .sidebar i { color: #3b82f6; }
        .info-box {
            background: #e7f5ff;
            border: 1px solid #a5d8ff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
        }
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-title {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3b82f6;
        }
        friend-link {
            display: inline-block;
            background: #374151;
            color: #9ca3af;
            padding: 0.5rem 1rem;
            margin: 0.3rem;
            border-radius: 20px;
            font-size: 0.9rem;
            transition: all 0.3s;
        }
        friend-link:hover {
            background: #4b5563;
            color: white;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #374151;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: #1e3a8a;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
                padding: 0;
                z-index: 999;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
                padding: 1.5rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li { width: 100%; }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .article-content,
            .sidebar { padding: 1.5rem; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out forwards;
        }