* {
            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: #f8f9fa;
        }
        a {
            text-decoration: none;
            color: #1a73e8;
        }
        a:hover {
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        .header {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            color: white;
            padding: 15px 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;
        }
        .logo a {
            font-size: 2rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            font-size: 2.5rem;
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        .nav-desktop a {
            color: white;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #6a11cb;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 15px;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 12px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 10px 15px;
            margin-bottom: 20px;
            border-radius: 5px;
        }
        .breadcrumb a {
            color: #495057;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
            padding: 30px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.5rem;
            color: #2d3748;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #4a5568;
            margin: 25px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e2e8f0;
        }
        h3 {
            font-size: 1.5rem;
            color: #718096;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .highlight {
            background: #fff3cd;
            padding: 15px;
            border-left: 4px solid #ffc107;
            margin: 20px 0;
            border-radius: 0 5px 5px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .image-container {
            margin: 30px 0;
            text-align: center;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        .image-container img:hover {
            transform: scale(1.02);
        }
        .caption {
            font-style: italic;
            color: #6c757d;
            margin-top: 10px;
        }
        .function-form {
            background: #f1f8ff;
            padding: 20px;
            border-radius: 10px;
            margin: 30px 0;
        }
        .function-form h3 {
            color: #1a73e8;
        }
        .form-group {
            margin-bottom: 15px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
        }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 10px;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        button {
            background: #1a73e8;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        button:hover {
            background: #0d62d9;
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-bottom: 15px;
        }
        .rating i {
            color: #ffc107;
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.3s;
        }
        .rating i:hover {
            color: #ff9800;
        }
        .footer-links {
            background: #2d3748;
            color: white;
            padding: 40px 0;
        }
        .web-link {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: rgba(255,255,255,0.1);
            border-radius: 5px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .web-link a {
            color: #90cdf4;
        }
        .copyright {
            background: #1a202c;
            color: #a0aec0;
            text-align: center;
            padding: 20px;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            .article, .sidebar {
                padding: 20px;
            }
        }