/* Reset y configuración base */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-color: #6366f1;
            --primary-dark: #4f46e5;
            --secondary-color: #8b5cf6;
            --accent-color: #06b6d4;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --danger-color: #ef4444;
            --dark-color: #1e293b;
            --light-color: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-400: #94a3b8;
            --gray-500: #64748b;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --gray-900: #0f172a;
            --border-radius: 12px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            color: var(--gray-800);
            line-height: 1.6;
        }

        /* Header y navegación */
        .header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 1rem 2rem;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }

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

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }

        .nav-tabs {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .nav-tab {
            padding: 0.75rem 1.5rem;
            background: transparent;
            border: 2px solid transparent;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s ease;
            color: var(--gray-600);
        }

        .nav-tab:hover {
            background: var(--gray-100);
            color: var(--gray-800);
        }

        .nav-tab.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

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

        .tab-content {
            display: none;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            padding: 2rem;
            margin-bottom: 2rem;
        }

        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }

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

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--gray-800);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Componentes comunes */
        .card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            margin-bottom: 1rem;
            border: 1px solid var(--gray-200);
            transition: all 0.3s ease;
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn {
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
            justify-content: center;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-secondary {
            background: var(--gray-100);
            color: var(--gray-700);
        }

        .btn-secondary:hover {
            background: var(--gray-200);
        }

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

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

        .input-group {
            margin-bottom: 1rem;
        }

        .input-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--gray-700);
        }

        .input, select, textarea {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid var(--gray-200);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        .grid {
            display: grid;
            gap: 1rem;
        }

        .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)); }

        /* Planificador Semanal */
        .weekly-planner {
            display: grid;
            grid-template-columns: 80px repeat(7, 1fr);
            gap: 1px;
            background: var(--gray-300);
            border-radius: var(--border-radius);
            overflow: hidden;
        }

        .time-slot {
            background: var(--gray-100);
            padding: 0.5rem;
            text-align: center;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--gray-600);
        }

        .day-header {
            background: var(--primary-color);
            color: white;
            padding: 1rem;
            text-align: center;
            font-weight: 600;
        }

        .day-column {
            background: white;
            min-height: 400px;
            position: relative;
        }

        .task-block {
            background: var(--primary-color);
            color: white;
            padding: 0.5rem;
            margin: 2px;
            border-radius: 4px;
            font-size: 0.8rem;
            cursor: move;
            border: 2px solid transparent;
            transition: all 0.2s ease;
        }

        .task-block:hover {
            border-color: var(--primary-dark);
            transform: scale(1.02);
        }

        .task-block.dragging {
            opacity: 0.5;
            transform: rotate(5deg);
        }

        .drop-zone {
            min-height: 60px;
            border: 2px dashed transparent;
            transition: all 0.3s ease;
        }

        .drop-zone.drag-over {
            border-color: var(--accent-color);
            background: rgba(6, 182, 212, 0.1);
        }

        .priority-high { background: var(--danger-color) !important; }
        .priority-medium { background: var(--warning-color) !important; }
        .priority-low { background: var(--success-color) !important; }

        /* Lista de Compras */
        .shopping-filters {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
            padding: 1rem;
            background: var(--gray-100);
            border-radius: var(--border-radius);
        }

        .budget-tracker {
            background: linear-gradient(135deg, var(--success-color), var(--accent-color));
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            text-align: center;
            margin-bottom: 1.5rem;
        }

        .budget-amount {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .shopping-items {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1rem;
        }

        .shopping-item {
            background: var(--gray-50);
            border: 2px solid var(--gray-200);
            border-radius: var(--border-radius);
            padding: 1rem;
            transition: all 0.3s ease;
        }

        .shopping-item:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }

        .shopping-item.selected {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .item-category {
            font-size: 0.8rem;
            opacity: 0.7;
            margin-bottom: 0.5rem;
        }

        .item-name {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .item-price {
            font-size: 1.2rem;
            font-weight: 700;
        }

        .quantity-controls {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-top: 0.5rem;
        }

        .quantity-btn {
            width: 30px;
            height: 30px;
            border: none;
            border-radius: 50%;
            background: var(--primary-color);
            color: white;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .quantity-btn:hover {
            background: var(--primary-dark);
        }

        /* Qué Hacer Cuando Estás Aburrido */
        .activity-filters {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .activity-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            min-height: 150px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .activity-card:hover {
            transform: translateY(-5px) scale(1.02);
            box-shadow: var(--shadow-lg);
        }

        .activity-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .activity-details {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        .random-activity {
            text-align: center;
            padding: 2rem;
            background: var(--gray-100);
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
        }

        .activity-result {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-color);
            margin: 1rem 0;
        }

        /* Calculadora de Hábitos */
        .habits-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
        }

        .habit-card {
            background: var(--gray-50);
            border: 2px solid var(--gray-200);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            transition: all 0.3s ease;
        }

        .habit-card:hover {
            border-color: var(--primary-color);
            box-shadow: var(--shadow);
        }

        .habit-card.selected {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .habit-name {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .habit-description {
            font-size: 0.9rem;
            opacity: 0.8;
            margin-bottom: 1rem;
        }

        .habit-cost {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--success-color);
        }

        .habit-card.selected .habit-cost {
            color: white;
        }

        .custom-habit-form {
            background: var(--gray-100);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 1.5rem;
        }

        .cost-breakdown {
            background: var(--gray-900);
            color: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            margin-top: 1.5rem;
        }

        .cost-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin-top: 1rem;
        }

        .cost-item {
            text-align: center;
            padding: 1rem;
            background: var(--gray-800);
            border-radius: var(--border-radius);
        }

        .cost-period {
            font-size: 0.9rem;
            opacity: 0.8;
            margin-bottom: 0.5rem;
        }

        .cost-amount {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-color);
        }

        /* Organizador de Proyectos */
        .project-boards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .board-column {
            background: var(--gray-100);
            border-radius: var(--border-radius);
            padding: 1rem;
        }

        .board-header {
            background: var(--primary-color);
            color: white;
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 1rem;
            text-align: center;
            font-weight: 600;
        }

        .board-tasks {
            min-height: 300px;
        }

        .task-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 1rem;
            margin-bottom: 0.5rem;
            box-shadow: var(--shadow);
            cursor: move;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .task-card:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }

        .task-card.dragging {
            opacity: 0.5;
            transform: rotate(5deg);
        }

        .task-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--gray-800);
        }

        .task-description {
            font-size: 0.9rem;
            color: var(--gray-600);
            margin-bottom: 1rem;
        }

        .task-actions {
            display: flex;
            gap: 0.5rem;
        }

        .task-actions .btn {
            padding: 0.5rem 1rem;
            font-size: 0.8rem;
        }

        .add-task-form {
            background: white;
            padding: 1rem;
            border-radius: var(--border-radius);
            border: 2px dashed var(--gray-300);
            margin-top: 1rem;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .header {
                padding: 1rem;
            }

            .nav-container {
                flex-direction: column;
                gap: 1rem;
            }

            .nav-tabs {
                width: 100%;
                justify-content: center;
            }

            .nav-tab {
                flex: 1;
                min-width: 120px;
            }

            .main-container {
                padding: 0 1rem;
                margin: 1rem auto;
            }

            .tab-content {
                padding: 1rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .weekly-planner {
                font-size: 0.8rem;
            }

            .shopping-filters {
                flex-direction: column;
            }

            .activity-filters {
                grid-template-columns: 1fr;
            }

            .cost-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .project-boards {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .nav-tab {
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
            }

            .budget-amount {
                font-size: 2rem;
            }

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

        /* Animaciones adicionales */
        .pulse {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        .bounce {
            animation: bounce 1s infinite;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
            40% { transform: translateY(-10px); }
            60% { transform: translateY(-5px); }
        }

        /* Utilidades */
        .text-center { text-align: center; }
        .text-right { text-align: right; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .hidden { display: none; }