:root {
            --primary-blue: #143965;
            --secondary-blue: #37b8f7;
            --dark-gray: #333333;
            --light-gray: #f8f9fa;
            --white: #ffffff;
            --text-light: #6c757d;
            --border-color: #e9ecef;
        }

        [data-theme="dark"] {
            --white: #1a1a1a;
            --light-gray: #2d2d2d;
            --dark-gray: #e9ecef;
            --text-light: #a8a8a8;
            --border-color: #404040;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: var(--dark-gray);
            background-color: var(--white);
            transition: all 0.3s ease;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .header {
            background: var(--white);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--primary-blue);
        }

        .logo-img {
            height: 40px;
            width: auto;
            display: block;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-blue);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1.2rem;
        }

        .logo-text h1 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0;
        }

        .logo-text p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 0;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--dark-gray);
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .nav-menu a:hover, .nav-menu a.active {
            color: var(--primary-blue);
        }

        .theme-toggle {
            background: none;
            border: 2px solid var(--border-color);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            color: var(--dark-gray);
            transition: all 0.3s ease;
        }

        .theme-toggle:hover {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }

        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--dark-gray);
            transition: all 0.3s ease;
        }

        /* Main Content */
        .main {
            margin-top: 80px;
            min-height: calc(100vh - 80px);
        }

        .section {
            padding: 3rem 0;
            opacity: 0;
            transform: translateY(40px);
            transition: all 0.6s ease;
        }

        .section.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Home Section */
        .hero {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .cta-button {
            background: white;
            color: var(--primary-blue);
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
        }

        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .profile-highlight {
            background: var(--light-gray);
            padding: 3rem 0;
        }

        .profile-card {
            display: flex;
            align-items: center;
            gap: 2rem;
            max-width: 800px;
            margin: 0 auto;
            background: var(--white);
            padding: 2rem;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        }

        .profile-photo {
            width: 160px;
            height: 160px;
            border-radius: 16px;
            object-fit: cover;
            border: 4px solid var(--secondary-blue);
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .profile-info h2 {
            color: var(--primary-blue);
            margin-bottom: 1rem;
        }

        .profile-info p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }

        .linkedin-link {
            color: var(--secondary-blue);
            text-decoration: none;
            font-weight: 600;
        }

        .linkedin-link:hover {
            text-decoration: underline;
        }

        .about-card {
            display: flex;
            align-items: center;
            gap: 2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            flex-wrap: wrap;
            justify-content: center;
        }

        .about-photo {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            border: 4px solid var(--secondary-blue);
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .about-name {
            color: var(--primary-blue);
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }

        .about-title {
            color: var(--text-light);
            font-size: 1.1rem;
        }

        .about-text p {
            margin-bottom: 1.5rem;
            line-height: 1.8;
            font-size: 1.1rem;
        }

        .about-exp {
            margin-bottom: 3rem;
        }

        .about-exp h3 {
            color: var(--primary-blue);
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }

        .about-exp ul {
            padding-left: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }

        .btn-linkedin {
            background: #0077b5;
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            margin-right: 1rem;
        }

        .btn-linkedin:hover {
            background: #005a8c;
        }

        .recent-articles {
            padding: 3rem 0;
        }

        /* Propósito Section */
        .proposito-section .purpose-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            max-width: 1000px;
            margin: 0 auto;
        }

        .purpose-item {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            text-align: center;
        }

        .purpose-icon {
            font-size: 2.5rem;
            color: var(--secondary-blue);
            margin-bottom: 1rem;
        }

        .purpose-item h3 {
            color: var(--primary-blue);
            margin-bottom: 1rem;
            font-size: 1.5rem;
        }

        .purpose-item p,
        .purpose-item ul {
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--text-light);
            text-align: left;
        }

        .purpose-item ul {
            padding-left: 1.2rem;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 3rem;
            font-weight: 700;
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }

        .article-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }

        .article-card:hover {
            transform: translateY(-5px);
        }

        .article-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .article-content {
            padding: 1.5rem;
        }

        .article-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-blue);
        }

        .article-summary {
            color: var(--text-light);
            margin-bottom: 1rem;
        }

        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .read-more {
            color: var(--secondary-blue);
            text-decoration: none;
            font-weight: 600;
        }

        .read-more:hover {
            text-decoration: underline;
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin-top: 1.5rem;
        }

        .pagination-btn {
            padding: 0.5rem 0.75rem;
            border: 1px solid var(--border-color);
            background: var(--white);
            border-radius: 4px;
            cursor: pointer;
        }

        .pagination-btn.active {
            background: var(--primary-blue);
            color: var(--white);
            border-color: var(--primary-blue);
        }

        /* Articles Section */
        .search-filter {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .search-input {
            flex: 1;
            min-width: 200px;
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
        }

        .filter-select {
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            min-width: 150px;
        }

        /* Article Page */
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .article-cover {
            width: 100%;
            max-width: 800px;
            height: 400px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 2rem;
        }

        .article-full-title {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .article-author-date {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 2rem;
        }

        .article-body {
            max-width: 800px;
            margin: 0 auto;
            font-size: 1.1rem;
            line-height: 1.8;
        }

        .article-signature {
            border-top: 2px solid var(--border-color);
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
        }

        .share-linkedin {
            background: #0077b5;
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            margin-top: 1rem;
        }

        .share-twitter {
            background: #1da1f2;
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            margin-top: 1rem;
        }

        .social-buttons a:first-child { margin-right: .5rem; }

        .tags {
            list-style: none;
            padding: 0;
            margin: 1rem 0;
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tag-badge,
        .category-badge {
            background: var(--secondary-blue);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 4px;
            font-size: 0.9rem;
        }

        blockquote {
            margin: 1.5rem auto;
            padding: 1rem 1.5rem;
            border-left: 4px solid var(--secondary-blue);
            background: var(--light-gray);
            font-style: italic;
        }

        .article-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--white);
            overflow-y: auto;
            z-index: 2000;
            padding-top: 80px;
        }

        .article-container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px 4rem;
        }

        .close-article {
            position: fixed;
            top: 20px;
            right: 20px;
            background: var(--primary-blue);
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            font-size: 1.2rem;
            cursor: pointer;
        }

        /* Forms */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--primary-blue);
        }

        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--secondary-blue);
        }

        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }

        .btn-primary {
            background: var(--primary-blue);
            color: white;
            padding: 0.75rem 2rem;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        .btn-primary:hover {
            background: var(--secondary-blue);
        }

        /* Footer */
        .footer {
            background: var(--primary-blue);
            color: white;
            padding: 3rem 0 1rem;
            margin-top: 4rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 1rem;
        }

        .footer-links a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.2);
            padding-top: 1rem;
            text-align: center;
            color: rgba(255,255,255,0.8);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 80px);
                background: var(--white);
                flex-direction: column;
                justify-content: start;
                padding-top: 2rem;
                transition: left 0.3s ease;
            }

            .nav-menu.active {
                left: 0;
            }

            .hamburger {
                display: flex;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .profile-card {
                flex-direction: column;
                text-align: center;
            }

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

            .search-filter {
                flex-direction: column;
            }

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

        /* Utility Classes */
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mt-3 { margin-top: 1.5rem; }
        .d-none { display: none; }