* {
            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: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 0;
        }

        /* Header de navegación principal */
        header:first-of-type {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
           
        }

        .container-nav {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 80px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.8em;
            font-weight: bold;
            color: #667eea;
            text-decoration: none;
        }

        .logo img {
            width: 68px;
            height: auto;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
            align-items: center;
        }

        .nav-menu a {
            color: #333;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-menu a:hover {
            color: #667eea;
        }

        .btn-primary-nav {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white !important;
            padding: 10px 25px;
            border-radius: 25px;
        }

        .btn-primary-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5em;
            color: #667eea;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 0;
            box-shadow: none;
            overflow: visible;
            padding: 0;
        }

        .page-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 40px;
            text-align: center;
        }

        .page-header h1 {
            font-size: 3em;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .page-header p {
            font-size: 1.3em;
            opacity: 0.95;
        }

        .internal-nav {
            background: #f8f9fa;
            padding: 20px;
            border-bottom: 3px solid #667eea;
            position: sticky;
            top: 80px;
            z-index: 100;
        }

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
        }

        nav a {
            color: #667eea;
            text-decoration: none;
            padding: 10px 20px;
            border-radius: 25px;
            background: white;
            transition: all 0.3s;
            font-weight: 600;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        nav a:hover {
            background: #667eea;
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }

        .content {
            padding: 40px;
        }

        section {
            margin-bottom: 50px;
            animation: fadeIn 0.5s ease-in;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        h2 {
            color: #667eea;
            font-size: 2.2em;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #667eea;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        h3 {
            color: #764ba2;
            font-size: 1.6em;
            margin: 25px 0 15px 0;
        }

        h4 {
            color: #555;
            font-size: 1.3em;
            margin: 20px 0 10px 0;
        }

        p {
            margin-bottom: 15px;
            font-size: 1.1em;
            text-align: justify;
        }

        .info-box {
            background: #e3f2fd;
            border-left: 5px solid #2196f3;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        .warning-box {
            background: #fff3e0;
            border-left: 5px solid #ff9800;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        .success-box {
            background: #e8f5e9;
            border-left: 5px solid #4caf50;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        pre {
            background: #1e1e1e;
            color: #d4d4d4;
            padding: 20px;
            border-radius: 10px;
            overflow-x: auto;
            margin: 20px 0;
            border: 2px solid #667eea;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        code {
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.95em;
            line-height: 1.5;
        }

        .code-comment {
            color: #6a9955;
        }

        .code-keyword {
            color: #569cd6;
        }

        .code-string {
            color: #ce9178;
        }

        .code-number {
            color: #b5cea8;
        }

        ul, ol {
            margin-left: 30px;
            margin-bottom: 15px;
        }

        li {
            margin-bottom: 10px;
            font-size: 1.05em;
        }

        .example-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }

        .example-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s;
        }

        .example-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
        }

        .example-card h4 {
            color: white;
            margin-bottom: 10px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            background: white;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        th {
            background: #667eea;
            color: white;
            padding: 15px;
            text-align: left;
            font-weight: 600;
        }

        td {
            padding: 12px 15px;
            border-bottom: 1px solid #e0e0e0;
        }

        tr:hover {
            background: #f5f5f5;
        }

        footer {
            background: white;
            padding: 60px 20px 20px;
            margin-top: 50px;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-section h3 {
            color: #667eea;
            margin-bottom: 20px;
            font-size: 1.3em;
        }

        .footer-section p {
            color: #666;
            line-height: 1.8;
            text-align: left;
        }

        .footer-section ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-section ul li {
            margin-bottom: 12px;
        }

        .footer-section ul li a {
            color: #666;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-section ul li a:hover {
            color: #667eea;
        }

        .social-links-footer {
            display: flex;
            gap: 15px;
            margin-top: 15px;
        }

        .social-links-footer a {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 1.2em;
            transition: all 0.3s;
            text-decoration: none;
        }

        .social-links-footer a:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 2px solid #f0f0f0;
            color: #666;
        }

        .footer-bottom p {
            text-align: center;
        }

        .emoji {
            font-size: 1.5em;
            margin-right: 10px;
        }

        .btn {
            display: inline-block;
            background: #667eea;
            color: white;
            padding: 12px 30px;
            border-radius: 25px;
            text-decoration: none;
            margin: 10px 5px;
            transition: all 0.3s;
            font-weight: 600;
        }

        .btn:hover {
            background: #764ba2;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 80px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            }

            .nav-menu.active {
                display: flex;
            }

            .mobile-menu-btn {
                display: block;
            }

            .page-header h1 {
                font-size: 2em;
            }

            .internal-nav ul {
                flex-direction: column;
                align-items: center;
            }

            .content {
                padding: 20px;
            }

            h2 {
                font-size: 1.8em;
            }

            .example-grid {
                grid-template-columns: 1fr;
            }

            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        .highlight {
            background: linear-gradient(120deg, #84fab0 0%, #8fd3f4 100%);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }