* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1e40af;
            --secondary-color: #3b82f6;
            --accent-color: #f59e0b;
            --text-color: #1f2937;
            --light-bg: #f8fafc;
            --border-color: #e5e7eb;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --max-width: 1200px;
            --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-family);
            color: var(--text-color);
            line-height: 1.6;
            background-color: #fff;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0.5rem 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        nav {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-links {
            display: flex;
            gap: 1.5rem;
            list-style: none;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: background-color 0.3s;
            min-height: 44px;
            min-width: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-links a:hover {
            background-color: rgba(255,255,255,0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
            min-height: 44px;
            min-width: 44px;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            padding: 0.75rem 1rem;
            border: none;
            border-radius: 4px;
            min-width: 200px;
            font-size: 0.95rem;
        }
        .search-button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            border-radius: 4px;
            padding: 0.75rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
            min-height: 44px;
            min-width: 44px;
        }
        .search-button:hover {
            background-color: #d97706;
        }
        main {
            flex: 1;
            max-width: var(--max-width);
            margin: 2rem auto;
            padding: 0 1rem;
            width: 100%;
        }
        article {
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            padding: 2rem;
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin: 2rem 0 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--text-color);
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1rem;
            line-height: 1.7;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-color);
            background-color: var(--light-bg);
            padding: 1rem;
            border-left: 4px solid var(--accent-color);
            margin-bottom: 2rem;
            border-radius: 0 4px 4px 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin-top: 2rem;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            min-width: 0;
        }
        aside {
            background-color: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            background: white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            border-radius: 6px;
            overflow: hidden;
        }
        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        tr:hover {
            background-color: var(--light-bg);
        }
        .download-box {
            background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
            color: white;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        .download-box h3 {
            color: white;
            margin-top: 0;
        }
        .download-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 1.5rem;
        }
        .download-btn {
            background-color: white;
            color: var(--primary-color);
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            min-height: 44px;
            min-width: 44px;
        }
        .download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .image-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        .card:hover {
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .comment-form, .rating-form {
            background-color: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
            min-height: 44px;
            min-width: 44px;
        }
        .submit-btn:hover {
            background-color: #1e3a8a;
        }
        .rating-stars {
            display: flex;
            gap: 0.25rem;
            margin: 0.5rem 0;
        }
        .star {
            color: #d1d5db;
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: var(--warning-color);
        }
        .social-share {
            display: flex;
            gap: 1rem;
            margin: 2rem 0;
            flex-wrap: wrap;
        }
        .social-btn {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            text-decoration: none;
            color: white;
            font-weight: 500;
            transition: opacity 0.3s;
            min-height: 44px;
            min-width: 44px;
        }
        .facebook { background-color: #1877f2; }
        .twitter { background-color: #1da1f2; }
        .whatsapp { background-color: #25d366; }
        .telegram { background-color: #0088cc; }
        .social-btn:hover {
            opacity: 0.9;
        }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 100;
            transition: background-color 0.3s;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
        }
        footer {
            background-color: #111827;
            color: white;
            padding: 3rem 1rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links a {
            color: #d1d5db;
            text-decoration: none;
            display: block;
            padding: 0.5rem 0;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1rem 0;
        }
        friend-link a {
            color: var(--accent-color);
            text-decoration: none;
            padding: 0.5rem;
            background: rgba(245, 158, 11, 0.1);
            border-radius: 4px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .text-accent { color: var(--accent-color); }
        .text-primary { color: var(--primary-color); }
        .text-success { color: var(--success-color); }
        .bg-light { background-color: var(--light-bg); }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .p-2 { padding: 2rem; }
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--primary-color);
                flex-direction: column;
                padding: 1rem;
                box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                width: 100%;
                margin-top: 1rem;
                display: none;
            }
            .search-form.active {
                display: flex;
            }
            .search-input {
                flex: 1;
                min-width: 0;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            article {
                padding: 1.5rem;
            }
            .download-buttons {
                flex-direction: column;
            }
            .download-btn {
                width: 100%;
                justify-content: center;
            }
            .image-grid {
                grid-template-columns: 1fr;
            }
            .social-share {
                justify-content: center;
            }
            .back-to-top {
                bottom: 1rem;
                right: 1rem;
            }
        }
        @media print {
            .social-share,
            .back-to-top,
            .comment-form,
            .rating-form,
            .search-form,
            nav {
                display: none;
            }
            body {
                color: black;
                background: white;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }