* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f9f9f9;
            padding: 0;
            margin: 0;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #2c3e50;
        }
        a:hover {
            color: #e74c3c;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #2c3e50, #34495e);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: #e74c3c;
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: color 0.3s ease;
        }
        .logo a:hover {
            color: #fff;
        }
        .nav-container {
            display: flex;
            align-items: center;
        }
        .breadcrumb {
            font-size: 0.9rem;
            color: #bdc3c7;
            margin-bottom: 10px;
        }
        .breadcrumb a {
            color: #ecf0f1;
        }
        .breadcrumb a:hover {
            color: #e74c3c;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 1.8rem;
        }
        nav ul li a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            transition: background 0.3s ease;
        }
        nav ul li a:hover {
            background: rgba(255,255,255,0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
            background: none;
            border: none;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #2c3e50;
                padding: 1rem;
                box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 10px 0;
            }
        }
        main {
            padding: 2rem 0;
            background: white;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        article {
            padding-right: 1rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h2 {
            font-size: 2.2rem;
            color: #34495e;
            margin: 2rem 0 1rem;
            border-bottom: 3px solid #e74c3c;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #2c3e50;
            margin: 1.5rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #7f8c8d;
            margin: 1rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: #fffacd;
            padding: 1rem;
            border-left: 5px solid #f39c12;
            margin: 1.5rem 0;
            border-radius: 4px;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        .features {
            background: #ecf0f1;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .feature-box {
            margin-bottom: 1.5rem;
        }
        .feature-box h3 {
            font-size: 1.5rem;
            color: #2c3e50;
            margin-bottom: 0.5rem;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 12px;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
        }
        button {
            padding: 12px 24px;
            background: #e74c3c;
            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: #c0392b;
            transform: translateY(-2px);
        }
        aside {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar-section h3 {
            font-size: 1.4rem;
            color: #2c3e50;
            margin-bottom: 1rem;
            padding-bottom: 5px;
            border-bottom: 2px solid #e74c3c;
        }
        footer {
            background: #2c3e50;
            color: white;
            padding: 2rem 0 1rem;
            margin-top: 3rem;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 12px;
            border-radius: 6px;
            transition: background 0.3s ease;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .web-link a {
            color: #ecf0f1;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6278;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .container { padding: 0 15px; }
            .features { padding: 1.5rem; }
        }