/* === VARIABLES CSS === */
        :root {
            /* Colores principales */
            --bg-primary: #0a0a0a;
            --bg-secondary: #121212;
            --bg-tertiary: #1a1a1a;
            --bg-card: #1e1e1e;
            --bg-hover: #252525;
            
            /* Colores de texto */
            --text-primary: #ffffff;
            --text-secondary: #e0e0e0;
            --text-muted: #b0b0b0;
            
            /* Color de acento */
            --accent-primary: #00ff88;
            --accent-secondary: #ff0066;
            --accent-tertiary: #00b4d8;
            
            /* Bordes y sombras */
            --border-color: rgba(255, 255, 255, 0.1);
            --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.4);
            
            /* Espaciados */
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2rem;
            --spacing-xl: 3rem;
            
            /* Fuentes */
            --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        /* === RESET CSS === */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* === HEADER === */
        .header {
            background-color: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            padding: var(--spacing-sm) 0;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--accent-primary);
            text-decoration: none;
        }

        .nav-tabs {
            display: flex;
            gap: var(--spacing-sm);
            list-style: none;
        }

        .nav-tab {
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: 6px;
            background-color: transparent;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            font-size: 0.95rem;
        }

        .nav-tab:hover,
        .nav-tab.active {
            background-color: var(--bg-card);
            color: var(--accent-primary);
            transform: translateY(-2px);
        }

        /* === CONTENEDOR PRINCIPAL === */
        .main-container {
            max-width: 1200px;
            margin: 80px auto var(--spacing-xl);
            padding: 0 var(--spacing-sm);
        }

        .section {
            display: none;
            animation: fadeIn 0.5s ease-in-out;
        }

        .section.active {
            display: block;
        }

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

        /* === TARJETAS === */
        .card {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
        }

        /* === TÍTULOS === */
        .title {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: var(--spacing-lg);
            color: var(--text-primary);
        }

        .subtitle {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-md);
            color: var(--text-secondary);
        }

        /* === BOTONES === */
        .btn {
            background-color: var(--accent-primary);
            color: var(--bg-primary);
            border: none;
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .btn:hover {
            background-color: #00cc6a;
            transform: translateY(-2px);
        }

        .btn-secondary {
            background-color: var(--bg-hover);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            background-color: var(--bg-card);
        }

        /* === FORMULARIOS === */
        .form-group {
            margin-bottom: var(--spacing-md);
        }

        .form-label {
            display: block;
            margin-bottom: var(--spacing-xs);
            color: var(--text-secondary);
            font-weight: 500;
        }

        .form-input,
        .form-textarea,
        .form-select {
            width: 100%;
            padding: var(--spacing-sm);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-hover);
            color: var(--text-primary);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .form-input:focus,
        .form-textarea:focus,
        .form-select:focus {
            outline: none;
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.2);
        }

        /* === GRID LAYOUTS === */
        .grid {
            display: grid;
            gap: var(--spacing-md);
        }

        .grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
        .grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
        .grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

        /* === SISTEMA DE BLOG === */
        .blog-post {
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-lg);
            border-bottom: 1px solid var(--border-color);
        }

        .blog-post:last-child {
            border-bottom: none;
        }

        .blog-meta {
            display: flex;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-sm);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .blog-category {
            background-color: var(--accent-tertiary);
            color: var(--bg-primary);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: bold;
        }

        .blog-content {
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }

        /* === SISTEMA DE VIDEOS === */
        .video-player {
            position: relative;
            width: 100%;
            padding-bottom: 56.25%; /* 16:9 aspect ratio */
            background-color: var(--bg-hover);
            border-radius: 12px;
            overflow: hidden;
            margin-bottom: var(--spacing-md);
        }

        .video-placeholder {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(45deg, var(--bg-card), var(--bg-hover));
            color: var(--text-muted);
            font-size: 1.2rem;
        }

        .video-controls {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
            padding: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }

        .video-info {
            margin-bottom: var(--spacing-md);
        }

        .video-title {
            font-size: 1.3rem;
            font-weight: bold;
            margin-bottom: var(--spacing-xs);
        }

        /* === LISTAS DE RECOMENDACIONES === */
        .recommendation-list {
            margin-bottom: var(--spacing-lg);
        }

        .recommendation-item {
            display: flex;
            align-items: center;
            padding: var(--spacing-sm);
            border-radius: 8px;
            background-color: var(--bg-hover);
            margin-bottom: var(--spacing-sm);
            transition: all 0.3s ease;
        }

        .recommendation-item:hover {
            background-color: var(--bg-card);
        }

        .rating {
            display: flex;
            gap: 2px;
            margin-left: auto;
        }

        .star {
            color: #ffdd00;
            cursor: pointer;
            font-size: 1.1rem;
            transition: all 0.2s ease;
        }

        .star:hover {
            transform: scale(1.1);
        }

        /* === BÚSQUEDA === */
        .search-container {
            margin-bottom: var(--spacing-lg);
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: var(--spacing-sm) var(--spacing-md);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-hover);
            color: var(--text-primary);
            font-size: 1rem;
        }

        .search-input::placeholder {
            color: var(--text-muted);
        }

        /* === FILTROS === */
        .filters {
            display: flex;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .filter-btn {
            padding: var(--spacing-xs) var(--spacing-sm);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background-color: transparent;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background-color: var(--accent-primary);
            color: var(--bg-primary);
            border-color: var(--accent-primary);
        }

        /* === MODAL === */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.8);
            z-index: 2000;
            animation: fadeIn 0.3s ease;
        }

        .modal.active {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .modal-content {
            background-color: var(--bg-card);
            padding: var(--spacing-lg);
            border-radius: 12px;
            max-width: 600px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            position: relative;
        }

        .modal-close {
            position: absolute;
            top: var(--spacing-sm);
            right: var(--spacing-sm);
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-muted);
            cursor: pointer;
            transition: color 0.3s ease;
        }

        .modal-close:hover {
            color: var(--text-primary);
        }

        /* === MENSAJES === */
        .message {
            padding: var(--spacing-sm);
            border-radius: 8px;
            margin-bottom: var(--spacing-md);
            font-weight: 500;
        }

        .message-success {
            background-color: rgba(0, 255, 136, 0.1);
            color: var(--accent-primary);
            border: 1px solid rgba(0, 255, 136, 0.3);
        }

        .message-error {
            background-color: rgba(255, 0, 102, 0.1);
            color: var(--accent-secondary);
            border: 1px solid rgba(255, 0, 102, 0.3);
        }

        /* === LOADING === */
        .loading {
            display: none;
            text-align: center;
            padding: var(--spacing-lg);
            color: var(--text-muted);
        }

        .loading.active {
            display: block;
        }

        .spinner {
            width: 40px;
            height: 40px;
            border: 3px solid var(--border-color);
            border-top: 3px solid var(--accent-primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto var(--spacing-sm);
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* === JUEGO === */
        .game-container {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: var(--spacing-lg);
            text-align: center;
        }

        .game-score {
            font-size: 2rem;
            font-weight: bold;
            color: var(--accent-primary);
            margin: var(--spacing-md) 0;
        }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(3, 80px);
            gap: 10px;
            justify-content: center;
            margin: var(--spacing-lg) 0;
        }

        .game-cell {
            width: 80px;
            height: 80px;
            background-color: var(--bg-hover);
            border: 2px solid var(--border-color);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
        }

        .game-cell:hover {
            background-color: var(--bg-card);
        }

        .game-cell.occupied {
            background-color: var(--accent-primary);
            color: var(--bg-primary);
        }

        /* === FOOTER === */
        .footer {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: var(--spacing-lg) 0;
            text-align: center;
            color: var(--text-muted);
            margin-top: var(--spacing-xl);
        }

        /* === RESPONSIVE === */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: var(--spacing-sm);
            }

            .nav-tabs {
                flex-wrap: wrap;
                justify-content: center;
            }

            .main-container {
                margin-top: 120px;
            }

            .filters {
                justify-content: center;
            }

            .game-grid {
                grid-template-columns: repeat(3, 60px);
            }

            .game-cell {
                width: 60px;
                height: 60px;
                font-size: 1.5rem;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .title {
                font-size: 1.5rem;
            }

            .card {
                padding: var(--spacing-sm);
            }

            .modal-content {
                padding: var(--spacing-sm);
            }
        }

        /* === UTILIDADES === */
        .text-center { text-align: center; }
        .text-muted { color: var(--text-muted); }
        .hidden { display: none; }
        .flex { display: flex; }
        .justify-between { justify-content: space-between; }
        .items-center { align-items: center; }
        .gap-sm { gap: var(--spacing-sm); }
        .mb-md { margin-bottom: var(--spacing-md); }
        .mt-lg { margin-top: var(--spacing-lg); }