:root {
            --primary-color: #4a6fa5;
            --secondary-color: #166088;
            --accent-color: #4fc3a1;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --success-color: #28a745;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f0f2f5;
            color: var(--dark-color);
            line-height: 1.6;
        }

        /* Header y navegación */
        header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 1rem;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo i {
            font-size: 2rem;
        }

        .logo h1 {
            font-size: 1.5rem;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: white;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        /* Navegación principal */
        nav {
            background-color: white;
            box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 100;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: flex-start;
            padding: 0;
        }

        .nav-links {
            display: flex;
            list-style: none;
            overflow-x: auto;
            overflow-y: hidden;
            width: 100%;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links li {
            flex-shrink: 0;
            scroll-snap-align: start;
        }

        .nav-links a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 0.5rem 1rem;
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            border-top: 3px solid transparent;
            transition: all 0.3s;
            white-space: nowrap;
            min-width: 80px;
            font-size: 0.75rem;
        }

        .nav-links a i {
            font-size: 1.5rem;
            margin-bottom: 0.25rem;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--primary-color);
            border-top-color: var(--primary-color);
            background-color: rgba(74, 111, 165, 0.05);
        }

        /* Contenido principal */
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem 80px 1rem;
        }

        .dashboard {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        /* Tarjetas */
        .card {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform 0.3s;
        }

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

        .card-header {
            background-color: var(--primary-color);
            color: white;
            padding: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .card-header h3 {
            font-size: 1.2rem;
        }

        .card-body {
            padding: 1.5rem;
        }

        /* Formularios */
        .form-group {
            margin-bottom: 1rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--dark-color);
        }

        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: border 0.3s;
        }

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

        /* Botones */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }

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

        .btn-success {
            background-color: var(--success-color);
            color: white;
        }

        .btn-warning {
            background-color: var(--warning-color);
            color: var(--dark-color);
        }

        .btn-danger {
            background-color: var(--danger-color);
            color: white;
        }

        .btn-block {
            width: 100%;
        }

        /* Tablas responsivas con cards en móvil */
        .table-container {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--border-radius);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1rem;
            min-width: 600px;
            background-color: white;
        }

        th, td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }

        th {
            background-color: #f8f9fa;
            font-weight: 600;
            color: var(--dark-color);
            position: sticky;
            left: 0;
            z-index: 10;
        }

        tr:hover {
            background-color: #f8f9fa;
        }

        /* Cards para tablas en móvil */
        .mobile-card {
            display: none;
        }

        /* Login */
        .login-container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        }

        .login-card {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            width: 100%;
            max-width: 400px;
            padding: 2rem;
        }

        .login-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .login-header h2 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        /* Calendario */
        .calendar-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 1.5rem;
        }

        .calendar {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }

        .calendar-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }

        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 5px;
        }

        .calendar-day {
            padding: 0.75rem;
            text-align: center;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .calendar-day:hover {
            background-color: #f0f0f0;
        }

        .calendar-day.active {
            background-color: var(--primary-color);
            color: white;
        }

        .calendar-day.event {
            background-color: rgba(79, 195, 161, 0.2);
            border: 1px solid var(--accent-color);
        }

        .calendar-day.event:hover {
            background-color: rgba(79, 195, 161, 0.3);
        }

        .calendar-events {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }

        .event-item {
            padding: 0.75rem;
            margin-bottom: 0.75rem;
            border-left: 4px solid var(--primary-color);
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .dashboard {
                grid-template-columns: 1fr;
            }
            
            .calendar-container {
                grid-template-columns: 1fr;
            }
            
            .stats {
                grid-template-columns: 1fr;
            }
            
            .stat-card {
                padding: 1rem;
            }
            
            .card-body {
                padding: 1rem;
            }
            
            .btn {
                padding: 0.6rem 1rem;
                font-size: 0.9rem;
                width: 100%;
                margin-bottom: 0.5rem;
            }
            
            .btn:last-child {
                margin-bottom: 0;
            }
            
            .tabs {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                margin: 0 -1rem;
                padding: 0 1rem;
            }
            
            .tab {
                padding: 0.75rem 1rem;
                white-space: nowrap;
            }
            
            /* Tablas como cards en móvil */
            .table-container {
                overflow: visible;
            }
            
            table {
                display: none;
            }
            
            .mobile-card {
                display: block;
                background-color: white;
                border-radius: var(--border-radius);
                padding: 1rem;
                margin-bottom: 1rem;
                box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            }
            
            .mobile-card-row {
                display: flex;
                justify-content: space-between;
                padding: 0.5rem 0;
                border-bottom: 1px solid #eee;
            }
            
            .mobile-card-row:last-child {
                border-bottom: none;
            }
            
            .mobile-card-label {
                font-weight: 600;
                color: var(--dark-color);
            }
            
            .mobile-card-value {
                color: #666;
                text-align: right;
            }
            
            .mobile-card-actions {
                display: flex;
                gap: 0.5rem;
                margin-top: 1rem;
                padding-top: 1rem;
                border-top: 1px solid #eee;
            }
            
            .mobile-card-actions .btn {
                flex: 1;
                margin-bottom: 0;
            }
            
            .form-control {
                font-size: 16px;
            }
            
            h2 {
                font-size: 1.5rem;
            }
            
            h3 {
                font-size: 1.2rem;
            }
        }

        /* Indicadores */
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .stat-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
        }

        .stat-icon.blue {
            background-color: var(--primary-color);
        }

        .stat-icon.green {
            background-color: var(--success-color);
        }

        .stat-icon.orange {
            background-color: var(--warning-color);
        }

        .stat-icon.red {
            background-color: var(--danger-color);
        }

        .stat-info h3 {
            font-size: 1.8rem;
            margin-bottom: 0.25rem;
        }

        .stat-info p {
            color: #666;
            font-size: 0.9rem;
        }

        /* Pestañas */
        .tabs {
            display: flex;
            border-bottom: 1px solid #ddd;
            margin-bottom: 1.5rem;
        }

        .tab {
            padding: 1rem 1.5rem;
            cursor: pointer;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
        }

        .tab.active {
            border-bottom-color: var(--primary-color);
            color: var(--primary-color);
            font-weight: 500;
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        .subtab-content {
            display: none;
        }

        .subtab-content.active {
            display: block;
        }

        /* Offline indicator */
        .offline-indicator {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: var(--danger-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: var(--border-radius);
            display: none;
            z-index: 1000;
            box-shadow: var(--shadow);
        }

        .offline-indicator.show {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* Instalar PWA */
        .install-prompt {
            position: fixed;
            bottom: 20px;
            left: 20px;
            background-color: white;
            color: var(--dark-color);
            padding: 1rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            z-index: 1000;
            display: none;
            align-items: center;
            gap: 15px;
            max-width: 400px;
        }

        .install-prompt.show {
            display: flex;
        }

        .close-install {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #666;
        }