:root {
            /* Light Mode Variables */
            --bg-color: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --card-bg: rgba(255, 255, 255, 0.7);
            --card-border: rgba(255, 255, 255, 0.5);
            
            --app-card-bg: rgba(255, 255, 255, 0.7);
            --app-card-text: var(--text-main);
            --app-card-muted: var(--text-muted);
            --app-card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
            
            --app-icon-bg: rgba(var(--glow-rgb), 0.1);
            --app-icon-glow: none;
            --app-link-color: var(--primary-color);

            --primary-color: #2563eb;
            --primary-hover: #1d4ed8;
            --header-gradient-1: #0047AB; /* Azul Institucional PUCPR */
            --header-gradient-2: #3b82f6;
        }

        [data-theme="dark"] {
            /* Dark Mode Variables */
            --bg-color: #0c1324;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --card-bg: rgba(30, 41, 59, 0.7);
            --card-border: rgba(255, 255, 255, 0.05);

            --app-card-bg: #0f172a;
            --app-card-text: #ffffff;
            --app-card-muted: #94a3b8;
            --app-card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
            
            --app-icon-bg: radial-gradient(circle at center, rgba(var(--glow-rgb), 0.15) 0%, transparent 60%);
            --app-icon-glow: drop-shadow(0 0 8px rgba(var(--glow-rgb), 0.6));
            --app-link-color: rgb(var(--glow-rgb));

            --primary-color: #60a5fa;
            --primary-hover: #93c5fd;
            --header-gradient-1: #3b82f6;
            --header-gradient-2: #8b5cf6;
        }
        
        [data-theme="dark"] body {
            background-color: #0c1324;
            background-image: radial-gradient(rgba(255, 255, 255, 0.15) 1px, transparent 1px);
            background-size: 28px 28px;
        }

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

        body {
            font-family: \'Inter\', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            transition: background-color 0.4s ease, color 0.4s ease;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

        /* Abstract Animated Background */
        .bg-blobs {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            overflow: hidden;
            z-index: -1;
            pointer-events: none;
        }
        
        .blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.4;
            animation: float 20s infinite alternate ease-in-out;
        }

        .blob-1 {
            top: -10%;
            left: -10%;
            width: 50vw;
            height: 50vw;
            background: var(--header-gradient-1);
            animation-delay: 0s;
        }

        .blob-2 {
            bottom: -20%;
            right: -10%;
            width: 60vw;
            height: 60vw;
            background: var(--header-gradient-2);
            animation-delay: -5s;
        }
        
        .blob-3 {
            top: 40%;
            left: 30%;
            width: 30vw;
            height: 30vw;
            background: rgba(139, 92, 246, 0.3);
            animation-delay: -10s;
        }

        @keyframes float {
            0% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(5%, 10%) scale(1.1); }
            100% { transform: translate(-5%, -5%) scale(0.9); }
        }

        /* Disabled State */
        .app-card.disabled {
            opacity: 0.6;
            filter: grayscale(100%);
            pointer-events: none;
            cursor: not-allowed;
            box-shadow: none;
        }
        .app-card.disabled::after {
            display: none;
        }
        .badge-inactivo {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            background: rgba(100, 116, 139, 0.2);
            color: var(--text-muted);
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            z-index: 2;
        }
        [data-theme="dark"] .badge-inactivo {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Layout */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 2rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            width: 100%;
        }

        /* Category Filters */
        .category-filters {
            display: flex;
            gap: 0.75rem;
            margin-bottom: 2.5rem;
            overflow-x: auto;
            padding-bottom: 0.5rem;
            scrollbar-width: thin;
        }
        .category-filters::-webkit-scrollbar {
            height: 4px;
        }
        .category-filters::-webkit-scrollbar-thumb {
            background-color: var(--card-border);
            border-radius: 4px;
        }
        .cat-btn {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 0.5rem 1.25rem;
            border-radius: 2rem;
            cursor: pointer;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            white-space: nowrap;
            transition: all 0.3s ease;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .cat-btn:hover {
            color: var(--text-main);
            border-color: var(--primary-color);
        }
        .cat-btn.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            box-shadow: 0 4px 10px -2px rgba(37, 99, 235, 0.4);
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 4rem;
            position: relative;
        }

        .logo-area h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--header-gradient-1), var(--header-gradient-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.03em;
            margin-bottom: 0.5rem;
        }

        .logo-area p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
        }

        /* Header Controls */
        .header-controls {
            display: flex;
            gap: 1rem;
            align-items: center;
        }

        .icon-btn {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 0.75rem;
            border-radius: 50%;
            cursor: pointer;
            color: var(--text-main);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            text-decoration: none;
        }

        .icon-btn:hover {
            transform: translateY(-2px) scale(1.05);
            background: var(--card-border);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            color: var(--primary-color);
        }

        .icon-btn svg {
            width: 22px;
            height: 22px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .sun-icon { display: none; }
        [data-theme="dark"] .sun-icon { display: block; }
        [data-theme="dark"] .moon-icon { display: none; }

        /* Grid */
        .apps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 2rem;
        }

        /* Card */
        .app-card {
            background: var(--app-card-bg);
            border: 1px solid var(--card-border);
            border-radius: 1.25rem;
            text-decoration: none;
            color: var(--app-card-text);
            display: flex;
            flex-direction: column;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--app-card-shadow);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .app-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 2px;
            background: rgb(var(--glow-rgb));
            opacity: 0.5;
            transition: opacity 0.4s ease;
            z-index: 2;
        }

        .app-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
            border-color: rgba(var(--glow-rgb), 0.3);
        }

        .app-card:hover::before {
            opacity: 1;
            box-shadow: 0 0 10px rgba(var(--glow-rgb), 0.8);
        }

        .app-icon {
            width: 100%;
            height: 140px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: var(--app-icon-bg);
            border-bottom: 1px solid var(--card-border);
            transition: all 0.4s ease;
            gap: 0.6rem;
            padding-top: 0.5rem;
        }
        
        .app-card:hover .app-icon {
            background: radial-gradient(circle at center, rgba(var(--glow-rgb), 0.25) 0%, transparent 65%);
        }

        .app-icon svg {
            width: 48px;
            height: 48px;
            stroke: rgb(var(--glow-rgb));
            filter: var(--app-icon-glow);
            transition: transform 0.4s ease;
            fill: none; /* Asegura línea si aplica */
        }
        
        .app-card:hover .app-icon svg {
            transform: scale(1.1);
        }

        .app-card-content {
            padding: 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .app-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }

        .app-category {
            font-size: 0.65rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: rgb(var(--glow-rgb));
            border: 1px solid rgba(var(--glow-rgb), 0.3);
            background: rgba(var(--glow-rgb), 0.1);
            padding: 0.25rem 0.6rem;
            border-radius: 1rem;
        }

        .app-card h2 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .app-card-content p {
            color: var(--app-card-muted);
            line-height: 1.6;
            font-size: 0.95rem;
            flex-grow: 1;
            margin: 0;
        }

        .app-link {
            padding: 1rem 1.5rem;
            border-top: 1px solid var(--card-border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--app-link-color);
            font-weight: 600;
            font-size: 0.85rem;
            transition: color 0.3s ease;
            margin-top: 0;
        }
        
        .app-card:hover .app-link {
            color: rgb(var(--glow-rgb));
            filter: brightness(1.2);
        }

        .app-link svg {
            width: 16px;
            height: 16px;
            transition: transform 0.3s ease;
        }

        .app-card:hover .app-link svg {
            transform: translateX(5px);
        }

        footer {
            text-align: center;
            padding: 2rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: auto;
            border-top: 1px solid var(--card-border);
            backdrop-filter: blur(10px);
        }

        /* List View Modifier */
        .apps-grid.list-view {
            grid-template-columns: 1fr;
            gap: 1rem;
        }
        .apps-grid.list-view .app-card {
            flex-direction: row;
            align-items: stretch;
            padding: 0;
        }
        .apps-grid.list-view .app-icon {
            width: 140px;
            height: auto;
            border-bottom: none;
            border-right: 1px solid var(--card-border);
            background: radial-gradient(circle at center, rgba(var(--glow-rgb), 0.1) 0%, transparent 80%);
            padding: 1.2rem 0.5rem;
        }
        .apps-grid.list-view .app-card:hover .app-icon {
            background: radial-gradient(circle at center, rgba(var(--glow-rgb), 0.2) 0%, transparent 80%);
        }
        .apps-grid.list-view .app-icon svg {
            width: 36px;
            height: 36px;
        }
        .apps-grid.list-view .app-card-content {
            padding: 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .apps-grid.list-view .app-link {
            border-top: none;
            border-left: 1px solid var(--card-border);
            padding: 1.5rem;
            width: 180px;
        }
        .apps-grid.list-view .badge-inactivo {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            order: 4;
            margin-left: 0;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .logo-area h1 { font-size: 2.2rem; }
            header { 
                flex-direction: column; 
                align-items: flex-start;
                gap: 1.5rem;
                margin-bottom: 3rem;
            }
            .header-controls {
                position: absolute;
                top: 0;
                right: 0;
            }
            .container { padding: 2rem 1.5rem; }
            .apps-grid { grid-template-columns: 1fr; }

            .apps-grid.list-view .app-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 2rem;
            }
            .apps-grid.list-view .app-icon {
                margin-bottom: 1.5rem;
                margin-right: 0;
            }
            .apps-grid.list-view .app-link {
                margin-top: 1.5rem;
                margin-left: 0;
            }
            .apps-grid.list-view .badge-inactivo {
                position: absolute;
                top: 1.5rem;
                right: 1.5rem;
                order: unset;
                margin-left: 0;
            }
        }

        /* Barra de búsqueda interactiva */
        .search-container {
            position: relative;
            max-width: 500px;
            width: 100%;
            margin: 0 auto 2.5rem auto;
        }
        .search-wrapper {
            position: relative;
            display: flex;
            align-items: center;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 2rem;
            padding: 0 1.25rem;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .search-wrapper:hover {
            border-color: var(--primary-color);
        }
        .search-wrapper:focus-within {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25), var(--app-card-shadow);
        }
        .search-input {
            width: 100%;
            border: none;
            background: transparent;
            padding: 0.8rem 0.5rem;
            font-size: 1rem;
            font-family: inherit;
            color: var(--text-main);
            outline: none;
        }
        .search-icon {
            width: 20px;
            height: 20px;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        /* Indicadores de Estado de Aplicación */
        .ping-indicator {
            position: absolute;
            top: 1rem;
            left: 1rem;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: #94a3b8; /* gris por defecto */
            box-shadow: 0 0 0 2px var(--app-card-bg);
            z-index: 10;
            transition: all 0.3s ease;
        }
        .ping-indicator.online {
            background-color: #22c55e; /* verde */
            box-shadow: 0 0 0 2px var(--app-card-bg), 0 0 8px rgba(34, 197, 94, 0.8);
            animation: ping-pulse 2s infinite;
        }
        .ping-indicator.offline {
            background-color: #ef4444; /* rojo */
            box-shadow: 0 0 0 2px var(--app-card-bg), 0 0 8px rgba(239, 68, 68, 0.8);
        }
        .ping-indicator.checking {
            background-color: #eab308; /* amarillo */
            animation: ping-pulse 1s infinite;
        }

        @keyframes ping-pulse {
            0% {
                transform: scale(0.95);
                opacity: 0.8;
            }
            50% {
                transform: scale(1.15);
                opacity: 1;
            }
            100% {
                transform: scale(0.95);
                opacity: 0.8;
            }
        }
        
        /* Ajuste para el ícono y contenido si hay ping indicator */
        .app-card {
            padding-top: 0.5rem;
        }
        .apps-grid.list-view .app-card {
            padding-top: 0;
        }
        .apps-grid.list-view .ping-indicator {
            top: 50%;
            left: 0.5rem;
            transform: translateY(-50%);
        }
        @media (max-width: 768px) {
            .apps-grid.list-view .ping-indicator {
                top: 1rem;
                left: 1rem;
                transform: none;
            }
        }
        
        /* Para mostrar la última hora de ping */
        .ping-time {
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
            display: block;
        }