* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    :root {
        --primary-color: #000000;
        --secondary-color: #ffffff;
        --accent-color: #00a8ff;
        --light-gray: #f5f5f5;
        --medium-gray: #e0e0e0;
        --dark-gray: #333333;
        --text-color: #222222;
        --border-radius: 8px;
        --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        --transition: all 0.3s ease;
    }

    body {
        background-color: var(--secondary-color);
        color: var(--text-color);
        line-height: 1.6;
        overflow-x: hidden;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 15px;
        width: 100%;
    }

    /* Header Styles */
    header {
        background-color: var(--primary-color);
        color: var(--secondary-color);
        padding: 1rem 0;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        position: sticky;
        top: 0;
        z-index: 100;
    }

    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: relative;
    }

    .logo {
        font-size: 1.5rem;
        font-weight: 700;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .logo i {
        color: var(--accent-color);
        font-size: 1.8rem;
    }

    nav ul {
        display: flex;
        list-style: none;
        gap: 1.5rem;
    }

    nav a {
        color: var(--secondary-color);
        text-decoration: none;
        font-weight: 500;
        transition: var(--transition);
        padding: 5px 0;
        position: relative;
        display: flex;
        align-items: center;
        gap: 5px;
        white-space: nowrap;
    }

    nav a i {
        font-size: 0.9rem;
    }

    nav a:hover {
        color: var(--accent-color);
    }

    nav a::after {
        content: '';
        position: absolute;
        width: 0;
        height: 2px;
        bottom: 0;
        left: 0;
        background-color: var(--accent-color);
        transition: width 0.3s ease;
    }

    nav a:hover::after {
        width: 100%;
    }

    .mobile-menu-btn {
        display: none;
        background: none;
        border: none;
        color: var(--secondary-color);
        font-size: 1.5rem;
        cursor: pointer;
        z-index: 101;
    }

    /* Hero Section */
    .hero {
        background: linear-gradient(rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.9)), url('https://images.unsplash.com/photo-1550745165-9bc0b252726f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
        color: var(--secondary-color);
        padding: 3rem 0;
        text-align: center;
        margin-bottom: 2rem;
    }

    .hero h1 {
        font-size: 2.2rem;
        margin-bottom: 1rem;
        line-height: 1.2;
        padding: 0 10px;
    }

    .hero p {
        font-size: 1.1rem;
        max-width: 700px;
        margin: 0 auto 1.5rem;
        opacity: 0.9;
        padding: 0 15px;
    }

    .hero-tags {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 1.5rem;
        padding: 0 10px;
    }

    .tag {
        background-color: rgba(255, 255, 255, 0.15);
        padding: 6px 12px;
        border-radius: 30px;
        font-size: 0.85rem;
        font-weight: 500;
        white-space: nowrap;
    }

    /* Main Content */
    .main-content {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 2rem;
        margin: 2rem 0;
    }

    article {
        background-color: var(--secondary-color);
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
        padding: 1.5rem;
        border: 1px solid var(--medium-gray);
        width: 100%;
        overflow: hidden;
    }

    article h2 {
        color: var(--primary-color);
        margin-bottom: 1.2rem;
        padding-bottom: 0.6rem;
        border-bottom: 2px solid var(--accent-color);
        font-size: 1.6rem;
        line-height: 1.3;
    }

    article h3 {
        color: var(--dark-gray);
        margin: 1.5rem 0 0.8rem;
        font-size: 1.3rem;
        line-height: 1.3;
    }

    article p {
        margin-bottom: 1rem;
        word-wrap: break-word;
    }

    /* Image Placeholders */
    .image-placeholder {
        /*
        background-color: var(--light-gray);
        border: 2px dashed var(--medium-gray);
        border-radius: var(--border-radius);
        */
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 1.5rem;
        margin: 1.5rem 0;
        text-align: center;
        min-height: 200px;
        overflow: hidden;
        width: 100%;
    }

    .image-placeholder img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: 4px;
    }

    .image-placeholder i {
        font-size: 2.5rem;
        color: var(--dark-gray);
        margin-bottom: 1rem;
    }

    .image-placeholder p {
        color: var(--dark-gray);
        font-weight: 500;
    }

    .image-caption {
        font-style: italic;
        text-align: center;
        margin-top: -0.5rem;
        margin-bottom: 1.5rem;
        color: #666;
        font-size: 0.85rem;
    }

    /* Specification Cards */
    .spec-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 15px;
        margin: 20px 0;
    }

    .spec-card {
        background-color: var(--light-gray);
        border-radius: var(--border-radius);
        padding: 1.2rem;
        border-left: 4px solid var(--accent-color);
    }

    .spec-card h4 {
        font-size: 1.1rem;
        margin-bottom: 10px;
        color: var(--primary-color);
        display: flex;
        align-items: center;
        gap: 8px;
    }

    /* Comparison Table */
    .comparison-table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
        border-radius: var(--border-radius);
        overflow: hidden;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        min-width: 300px;
    }

    .comparison-table-wrapper {
        overflow-x: auto;
        margin: 20px 0;
        -webkit-overflow-scrolling: touch;
    }

    .comparison-table th, .comparison-table td {
        border: 1px solid var(--medium-gray);
        padding: 12px;
        text-align: left;
        min-width: 120px;
    }

    .comparison-table th {
        background-color: var(--primary-color);
        color: var(--secondary-color);
        font-weight: 600;
        font-size: 0.95rem;
    }

    .comparison-table td {
        font-size: 0.9rem;
    }

    .comparison-table tr:nth-child(even) {
        background-color: var(--light-gray);
    }

    /* Steps */
    .step {
        margin-bottom: 1.5rem;
        padding-bottom: 1.2rem;
        border-bottom: 1px solid var(--medium-gray);
    }

    .step:last-child {
        border-bottom: none;
    }

    .step-number {
        display: inline-block;
        background-color: var(--primary-color);
        color: var(--secondary-color);
        width: 32px;
        height: 32px;
        border-radius: 50%;
        text-align: center;
        line-height: 32px;
        font-weight: 700;
        margin-right: 10px;
        font-size: 0.9rem;
    }

    /* Code Blocks */
    pre {
        background-color: var(--light-gray);
        border-left: 4px solid var(--accent-color);
        padding: 1.2rem;
        border-radius: var(--border-radius);
        overflow-x: auto;
        margin: 1.2rem 0;
        font-family: 'Courier New', monospace;
        font-size: 0.85rem;
        line-height: 1.4;
        -webkit-overflow-scrolling: touch;
    }

    code {
        background-color: var(--light-gray);
        padding: 2px 6px;
        border-radius: 4px;
        font-family: 'Courier New', monospace;
        font-size: 0.85rem;
    }

    /* Sidebar */
    .sidebar {
        background-color: var(--secondary-color);
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
        padding: 1.5rem;
        border: 1px solid var(--medium-gray);
        height: fit-content;
        position: sticky;
        top: 80px;
    }

    .sidebar h3 {
        color: var(--primary-color);
        margin-bottom: 1rem;
        padding-bottom: 0.5rem;
        border-bottom: 1px solid var(--medium-gray);
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 1.2rem;
    }

    .sidebar ul {
        list-style: none;
        margin-bottom: 1.5rem;
    }

    .sidebar li {
        margin-bottom: 0.7rem;
        padding-left: 1rem;
        position: relative;
    }

    .sidebar li::before {
        content: '•';
        color: var(--accent-color);
        font-size: 1.2rem;
        position: absolute;
        left: 0;
        top: -3px;
    }

    .sidebar a {
        color: var(--text-color);
        text-decoration: none;
        transition: var(--transition);
        font-size: 0.95rem;
    }

    .sidebar a:hover {
        color: var(--accent-color);
        text-decoration: underline;
    }

    .prerequisites-box {
        background-color: var(--light-gray);
        padding: 1.2rem;
        border-radius: var(--border-radius);
        margin-bottom: 1.2rem;
        border-left: 4px solid var(--accent-color);
    }

    /* Alert Boxes */
    .alert {
        padding: 1rem;
        border-radius: var(--border-radius);
        margin: 1.2rem 0;
        display: flex;
        align-items: flex-start;
        gap: 12px;
    }

    .alert i {
        font-size: 1.2rem;
        margin-top: 2px;
        flex-shrink: 0;
    }

    .alert-info {
        background-color: #e8f4fd;
        border-left: 4px solid #2196f3;
    }

    .alert-success {
        background-color: #e8f5e9;
        border-left: 4px solid #4caf50;
    }

    .alert-warning {
        background-color: #fff8e1;
        border-left: 4px solid #ff9800;
    }

    /* Footer */
    footer {
        background-color: var(--primary-color);
        color: var(--secondary-color);
        padding: 2.5rem 0 1.2rem;
        margin-top: 3rem;
    }

    .footer-content {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .footer-section h3 {
        color: var(--secondary-color);
        margin-bottom: 1rem;
        font-size: 1.2rem;
    }

    .footer-section p {
        opacity: 0.8;
        margin-bottom: 1rem;
        font-size: 0.95rem;
    }

    .footer-links {
        list-style: none;
    }

    .footer-links li {
        margin-bottom: 0.6rem;
    }

    .footer-links a {
        color: var(--secondary-color);
        text-decoration: none;
        opacity: 0.8;
        transition: var(--transition);
        font-size: 0.95rem;
    }

    .footer-links a:hover {
        opacity: 1;
        color: var(--accent-color);
    }

    .social-icons {
        display: flex;
        gap: 12px;
        margin-top: 1rem;
    }

    .social-icons a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        background-color: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        color: var(--secondary-color);
        transition: var(--transition);
        font-size: 1rem;
    }

    .social-icons a:hover {
        background-color: var(--accent-color);
        transform: translateY(-3px);
    }

    .copyright {
        text-align: center;
        padding-top: 1.2rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        opacity: 0.7;
        font-size: 0.85rem;
    }

    /* Responsive Styles */
    @media (max-width: 1200px) {
        .container {
            padding: 0 20px;
        }
        
        .main-content {
            gap: 1.5rem;
        }
    }

    @media (max-width: 992px) {
        .main-content {
            grid-template-columns: 1fr;
        }
        
        .sidebar {
            position: static;
            margin-top: 2rem;
        }
        
        .hero h1 {
            font-size: 1.8rem;
        }
        
        .hero p {
            font-size: 1rem;
        }
    }

    @media (max-width: 768px) {
        .header-content {
            flex-direction: row;
            align-items: center;
            min-height: 60px;
        }
        
        .logo {
            font-size: 1.3rem;
        }
        
        .logo i {
            font-size: 1.5rem;
        }

        nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 300px;
            height: 100vh;
            background-color: var(--primary-color);
            padding: 80px 20px 20px;
            transition: right 0.3s ease;
            z-index: 99;
            overflow-y: auto;
        }

        nav.active {
            right: 0;
        }

        nav ul {
            flex-direction: column;
            gap: 0;
        }

        nav li {
            padding: 0.8rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        nav a {
            font-size: 1rem;
            padding: 10px 0;
            white-space: normal;
        }

        .mobile-menu-btn {
            display: block;
            position: relative;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            z-index: 100;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.5);
            z-index: 98;
        }
        
        .mobile-menu-overlay.active {
            display: block;
        }

        .hero {
            padding: 2.5rem 0;
        }
        
        .hero h1 {
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
        }
        
        .hero p {
            font-size: 0.95rem;
            margin-bottom: 1.2rem;
        }
        
        .tag {
            font-size: 0.8rem;
            padding: 5px 10px;
        }

        article {
            padding: 1.2rem;
        }
        
        article h2 {
            font-size: 1.4rem;
        }
        
        article h3 {
            font-size: 1.2rem;
        }
        
        .step-number {
            width: 28px;
            height: 28px;
            line-height: 28px;
            font-size: 0.8rem;
        }
        
        .spec-grid {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        
        .image-placeholder {
            padding: 1rem;
            min-height: 150px;
        }
        
        .image-placeholder i {
            font-size: 2rem;
        }
        
        pre {
            padding: 1rem;
            font-size: 0.8rem;
        }
        
        .footer-content {
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        
        .footer-section {
            margin-bottom: 1rem;
        }
    }

    @media (max-width: 576px) {
        .container {
            padding: 0 15px;
        }
        
        .hero {
            padding: 2rem 0;
        }
        
        .hero h1 {
            font-size: 1.4rem;
        }
        
        .hero p {
            font-size: 0.9rem;
        }
        
        article {
            padding: 1rem;
        }
        
        article h2 {
            font-size: 1.3rem;
        }
        
        article h3 {
            font-size: 1.1rem;
        }
        
        .spec-card {
            padding: 1rem;
        }
        
        .spec-card h4 {
            font-size: 1rem;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 8px;
            font-size: 0.85rem;
        }
        
        .sidebar {
            padding: 1.2rem;
        }
        
        .sidebar h3 {
            font-size: 1.1rem;
        }
        
        .prerequisites-box {
            padding: 1rem;
        }
        
        .alert {
            padding: 0.8rem;
            flex-direction: column;
            gap: 8px;
        }
        
        .alert i {
            margin-top: 0;
        }
    }

    @media (max-width: 400px) {
        .logo {
            font-size: 1.1rem;
        }
        
        .logo i {
            font-size: 1.3rem;
        }
        
        .hero h1 {
            font-size: 1.3rem;
        }
        
        .hero-tags {
            justify-content: flex-start;
            overflow-x: auto;
            padding-bottom: 5px;
            justify-content: flex-start;
            -webkit-overflow-scrolling: touch;
        }
        
        .hero-tags::-webkit-scrollbar {
            height: 3px;
        }
        
        .tag {
            flex-shrink: 0;
        }
        
        article h2 {
            font-size: 1.2rem;
        }
        
        article h3 {
            font-size: 1rem;
        }
        
        .step-number {
            width: 24px;
            height: 24px;
            line-height: 24px;
            font-size: 0.7rem;
            margin-right: 8px;
        }
    }
    
    /* Fix for mobile menu body scroll lock */
    body.menu-open {
        overflow: hidden;
    }