* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
            padding: 0;
            margin: 0;
        }
        a {
            text-decoration: none;
            color: #2c8cff;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a5fb4;
            text-decoration: underline;
        }
        ul {
            list-style-type: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        header {
            background: linear-gradient(135deg, #1a237e, #283593);
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .my-logo:hover {
            color: #ffcc00;
        }
        nav ul {
            display: flex;
            gap: 1.5rem;
        }
        nav a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        nav a:hover {
            background-color: rgba(255,255,255,0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 0.8rem 2rem;
            background-color: #e8eaf6;
            font-size: 0.9rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #1a237e;
        }
        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        article {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
        }
        aside {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            align-self: start;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffcc00;
        }
        h3 {
            font-size: 1.6rem;
            color: #3949ab;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #555;
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: #f0f4ff;
            border-left: 5px solid #2c8cff;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 1rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border-left: 5px solid #ffcc00;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        .article-img {
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .last-updated {
            text-align: right;
            font-size: 0.9rem;
            color: #777;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .functional-section {
            margin-top: 3rem;
            padding: 2rem;
            background-color: #f5f7ff;
            border-radius: 10px;
            border: 1px solid #d1d9ff;
        }
        .functional-section h2 {
            border-bottom: none;
            color: #1a237e;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #2c8cff;
            box-shadow: 0 0 5px rgba(44,140,255,0.3);
        }
        button {
            padding: 0.9rem 1.5rem;
            background: linear-gradient(to right, #2c8cff, #1a5fb4);
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.2s;
        }
        button:hover {
            background: linear-gradient(to right, #1a5fb4, #2c8cff);
            transform: translateY(-2px);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffcc00;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1rem;
            color: #1a237e;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-left: 1rem;
            border-left: 3px solid #ffcc00;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 3rem 2rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #ffcc00;
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #c5cae9;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem;
            background-color: rgba(255,255,255,0.1);
            border-radius: 6px;
        }
        friend-link a {
            color: #ffcc00;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #c5cae9;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
                background-color: rgba(26, 35, 126, 0.95);
                padding: 1rem;
                border-radius: 8px;
            }
            nav ul.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .breadcrumb {
                padding: 0.8rem 1rem;
            }
            main {
                padding: 0 1rem;
            }
            article, aside {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }