/* Professional Corporate Color Scheme */
:root {
    --primary-gradient: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    --secondary-gradient: linear-gradient(135deg, #374151 0%, #1f2937 100%);
    --success-gradient: linear-gradient(135deg, #065f46 0%, #064e3b 100%);
    --warning-gradient: linear-gradient(135deg, #92400e 0%, #78350f 100%);
    --danger-gradient: linear-gradient(135deg, #991b1b 0%, #7f1d1d 100%);
    --glass-bg: rgba(255, 255, 255, 0.98);
    --glass-border: rgba(31, 41, 55, 0.12);
    --shadow-light: 0 4px 16px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-heavy: 0 12px 32px rgba(0, 0, 0, 0.12);
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --corporate-navy: #1f2937;
    --corporate-dark: #111827;
    --corporate-gray: #6b7280;
    --corporate-light: #f9fafb;
    --corporate-accent: #92400e;
    --border-radius: 8px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px 20px 0 20px;
    background: #f9fafb;
    min-height: 100vh;
    line-height: 1.6;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-heavy);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.welcome-section {
    text-align: center;
    margin-bottom: 30px;
}

.welcome-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.welcome-section p {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.8;
}

/* Resumen moderno */
.resumen {
    margin-bottom: 25px;
    font-size: 18px;
    text-align: center;
    padding: 25px;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.12), rgba(55, 65, 81, 0.12));
    border-radius: 15px;
    border: 2px solid var(--glass-border);
    font-weight: 600;
    color: var(--text-primary);
}

.resumen span {
    font-weight: 800;
    color: var(--corporate-blue);
    font-size: 20px;
}

/* Input section profesional */
.input-section {
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
    align-items: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 15px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.input-section:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

#descripcionTarea {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: var(--border-radius);
    font-size: 14px;
    background: white;
    transition: var(--transition);
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
}

#descripcionTarea:focus {
    border-color: var(--corporate-navy);
    box-shadow: 0 0 0 3px rgba(31, 41, 55, 0.1);
}

#descripcionTarea::placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

#agregarTarea {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--corporate-navy);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    min-width: 120px;
    font-family: inherit;
}

#agregarTarea:hover {
    background: var(--corporate-dark);
    box-shadow: var(--shadow-medium);
}

#agregarTarea:active {
    transform: translateY(0);
}

/* Estilos para las secciones de tareas */
.seccion-tareas {
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 25px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.seccion-tareas:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.titulo-seccion {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding: 16px 24px;
    border-radius: var(--border-radius);
    text-align: left;
    color: var(--text-primary);
    background: white;
    border: 1px solid #e5e7eb;
    box-shadow: var(--shadow-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.875rem;
}

.seccion-tareas:first-of-type .titulo-seccion {
    border-left: 4px solid #92400e;
}

.seccion-tareas:last-of-type .titulo-seccion {
    border-left: 4px solid #065f46;
}

/* Estilos de tablas */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    border: 1px solid #e5e7eb;
}

th, td {
    padding: 12px 18px;
    text-align: left;
    border-bottom: 1px solid #f3f4f6;
    transition: var(--transition);
    color: var(--text-primary);
    font-weight: 400;
}

th {
    background: #f9fafb;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #e5e7eb;
    padding: 12px 18px;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background: #f9fafb;
}

.id-cell {
    width: 80px;
    text-align: center;
    font-weight: 600;
    color: #667eea;
    font-size: 16px;
}

.fecha-cell {
    width: 180px;
    text-align: center;
    font-size: 14px;
    font-weight: 700;
    color: #000000;
    font-family: 'Courier New', monospace;
    background: rgba(30, 64, 175, 0.05);
    border-radius: 8px;
}

.tarea-cell {
    font-weight: 700;
    color: #000000;
    font-size: 15px;
    line-height: 1.4;
}

.checkbox-cell {
    width: 120px;
    text-align: center;
}

.edit-cell {
    width: 100px;
    text-align: center;
}

.eliminar-cell {
    width: 120px;
    text-align: center;
}

.btn-completar {
    background: var(--success-gradient);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-completar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
    filter: brightness(1.1);
}

.btn-editar {
    background: var(--corporate-accent);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.btn-editar:hover {
    background: #78350f;
    box-shadow: var(--shadow-medium);
}

.btn-desmarcar {
    background: var(--warning-gradient);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.3);
}

.btn-desmarcar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 152, 0, 0.4);
    filter: brightness(1.1);
}

.btn-eliminar {
    background: var(--danger-gradient);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-eliminar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
    filter: brightness(1.1);
}

.btn-eliminar:active, .btn-completar:active, .btn-desmarcar:active {
    transform: translateY(0);
}

.id-cell {
    width: 80px;
    text-align: center;
    font-weight: 600;
    color: #667eea;
    font-size: 16px;
}

.checkbox-cell {
    width: 120px;
    text-align: center;
}

.fecha-cell {
    width: 180px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: #666;
    font-family: 'Courier New', monospace;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 8px;
    margin: 4px;
}

.eliminar-cell {
    width: 120px;
    text-align: center;
}

.btn-eliminar {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-eliminar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
    filter: brightness(1.1);
}

.btn-eliminar:active {
    transform: translateY(0);
}

.checkbox-cell input[type="checkbox"] {
    cursor: pointer;
    width: 20px;
    height: 20px;
    accent-color: #667eea;
    transform: scale(1.2);
    transition: all 0.3s ease;
}

.checkbox-cell input[type="checkbox"]:hover {
    transform: scale(1.3);
}

/* Estilos para tareas completadas */
.texto-tachado {
    text-decoration: line-through;
    text-decoration-thickness: 2px;
    color: #000000;
    opacity: 0.8;
    transition: all 0.3s ease;
    font-weight: 700;
}

.estado-realizado {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: #047857;
    font-weight: 700;
    margin-left: 0.5rem;
    padding: 0.25rem 0.5rem;
    background: rgba(5, 150, 105, 0.15);
    border-radius: 10px;
    border: 1px solid rgba(5, 150, 105, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-style: italic;
    font-weight: 500;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    opacity: 0.5;
    color: var(--text-secondary);
}

.empty-state.pending i {
    color: #ff9800;
}

.empty-state.completed i {
    color: #4caf50;
}

.empty-state small {
    font-size: 0.9rem;
    opacity: 0.8;
    font-weight: 400;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.25);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.app-footer i {
    color: #ff6b6b;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Footer con derechos reservados */
.app-footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-top: 2px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: 15px 15px 0 0;
    box-shadow: var(--shadow-light);
}

.app-footer strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Animaciones */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.task-card {
    animation: slideInUp 0.5s ease forwards;
}

.pending-section .task-card {
    animation: slideInRight 0.5s ease forwards;
}

/* Responsive design moderno */
@media (max-width: 768px) {
    .app-header {
        padding: 0.4rem 0;
    }
    
    .header-content {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
        padding: 0 1rem;
    }
    
    .header-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .stat-card {
        min-width: 60px;
        padding: 0.4rem 0.6rem;
    }
    
    .tasks-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    .welcome-section {
        padding: 2rem 1rem;
    }
    
    .welcome-section h1 {
        font-size: 2rem;
    }
    
    .input-container {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        padding: 1rem;
    }
    
    #agregarTarea {
        justify-content: center;
    }
    
    .task-card {
        padding: 1rem;
    }
    
    .task-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .task-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.1rem;
    }
    
    .logo i {
        font-size: 1.3rem;
    }
    
    .welcome-section {
        padding: 1.5rem 1rem;
        margin-bottom: 1.5rem;
    }
    
    .welcome-section h1 {
        font-size: 1.6rem;
    }
    
    .section-title h2 {
        font-size: 1.2rem;
    }
    
    .task-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .task-id {
        align-self: flex-start;
    }
}

/* Estilos para tareas completadas */
.texto-tachado {
    text-decoration: line-through;
    color: var(--text-secondary);
    opacity: 0.7;
    transition: var(--transition);
}

.estado-realizado {
    font-size: 12px;
    color: #4caf50;
    font-weight: 600;
    margin-left: 15px;
    padding: 4px 8px;
    background: rgba(76, 175, 80, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(76, 175, 80, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tarea-completada {
    background: rgba(76, 175, 80, 0.05) !important;
    opacity: 1;
}

.tarea-completada .tarea-cell {
    color: #000000 !important;
    font-weight: 800 !important;
}

.tarea-completada .fecha-cell {
    color: #000000 !important;
    font-weight: 800 !important;
    background: rgba(5, 150, 105, 0.1) !important;
}

/* Tabla vacía mensaje */
.tabla-vacia {
    text-align: center;
    padding: 40px;
    color: var(--text-primary);
    font-style: italic;
    font-size: 16px;
    font-weight: 500;
    background: rgba(30, 64, 175, 0.08);
    border-radius: 10px;
    opacity: 0.8;
}



/* Storage info button - compact style */
.btn-storage-info {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--secondary-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(55, 65, 81, 0.2);
    opacity: 0.8;
}

.btn-storage-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(55, 65, 81, 0.3);
    opacity: 1;
}

.btn-storage-info:active {
    transform: translateY(0);
}

/* Modal styles for statistics */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay.show {
    display: flex;
}

.modal-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 0;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 2px solid rgba(30, 64, 175, 0.1);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(55, 65, 81, 0.1));
    border-radius: 20px 20px 0 0;
}

.modal-header h3 {
    margin: 0;
    color: var(--corporate-blue);
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--corporate-blue);
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.1);
}

.modal-body {
    padding: 30px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(30, 64, 175, 0.1);
}

.stat-item:last-of-type {
    border-bottom: none;
    margin-bottom: 20px;
}

.stat-label {
    font-weight: 500;
    color: var(--text-primary);
}

.stat-value {
    font-weight: 700;
    color: var(--corporate-blue);
    font-size: 16px;
}

.storage-bar {
    width: 100%;
    height: 8px;
    background: rgba(30, 64, 175, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin: 15px 0;
}

.storage-progress {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.storage-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin: 10px 0 0 0;
}

.modal-footer {
    display: flex;
    gap: 15px;
    padding: 20px 30px;
    border-top: 2px solid rgba(30, 64, 175, 0.1);
    justify-content: flex-end;
}

.btn-clean-old {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #f39c12, #e67e22);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(243, 156, 18, 0.2);
}

.btn-clean-old:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(243, 156, 18, 0.3);
}

.btn-modal-close {
    padding: 12px 25px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(30, 64, 175, 0.2);
}

.btn-modal-close:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.3);
}

/* Storage Alert Banners */
.storage-alert {
    margin: 20px auto;
    max-width: 1200px;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    animation: alertSlideIn 0.3s ease-out;
    border-left: 5px solid;
}

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

.storage-alert-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1), rgba(255, 235, 59, 0.1));
    border-left-color: #ffc107;
    color: #856404;
}

.storage-alert-critical {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1), rgba(255, 87, 34, 0.1));
    border-left-color: #dc3545;
    color: #721c24;
}

.storage-alert-success {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.1), rgba(76, 175, 80, 0.1));
    border-left-color: #28a745;
    color: #155724;
}

.alert-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.alert-text strong {
    display: block;
    font-size: 16px;
    margin-bottom: 5px;
}

.alert-text p {
    margin: 0;
    font-size: 14px;
    opacity: 0.9;
}

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

.btn-alert-action {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 3px 12px rgba(30, 64, 175, 0.3);
}

.btn-alert-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.4);
}

.storage-alert-critical .btn-alert-action {
    background: linear-gradient(135deg, #dc3545, #c82333);
    box-shadow: 0 3px 12px rgba(220, 53, 69, 0.3);
}

.storage-alert-critical .btn-alert-action:hover {
    box-shadow: 0 6px 20px rgba(220, 53, 69, 0.4);
}

.storage-alert-warning .btn-alert-action {
    background: linear-gradient(135deg, #ffc107, #e0a800);
    color: #212529;
    box-shadow: 0 3px 12px rgba(255, 193, 7, 0.3);
}

.storage-alert-warning .btn-alert-action:hover {
    box-shadow: 0 6px 20px rgba(255, 193, 7, 0.4);
}

.btn-alert-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 16px;
    padding: 8px;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0.7;
}

.btn-alert-close:hover {
    background: rgba(0, 0, 0, 0.1);
    opacity: 1;
    transform: scale(1.1);
}

/* ============================================ */
/* RESPONSIVE DESIGN - MOBILE & TABLET */
/* ============================================ */

/* Tablet Styles - iPad and similar (768px - 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
    .container {
        max-width: 95%;
        padding: 15px;
    }
    
    .welcome-section h1 {
        font-size: 2rem;
    }
    
    .input-section {
        flex-direction: row;
        gap: 12px;
    }
    
    #descripcionTarea {
        font-size: 15px;
        padding: 12px 16px;
    }
    
    #agregarTarea {
        padding: 12px 24px;
        font-size: 15px;
        min-width: 110px;
    }
    
    /* Tables for tablets */
    table {
        font-size: 14px;
    }
    
    th, td {
        padding: 10px 8px;
    }
    
    .btn-completar, .btn-eliminar, .btn-desmarcar {
        padding: 6px 12px;
        font-size: 12px;
    }
}

/* Mobile Styles - Phones (max 767px) */
@media (max-width: 767px) {
    body {
        font-size: 14px;
        padding: 10px;
    }
    
    .container {
        max-width: 100%;
        padding: 10px;
        margin: 0;
    }
    
    /* Welcome Section - Mobile */
    .welcome-section {
        padding: 20px 15px;
        margin-bottom: 20px;
    }
    
    .welcome-section h1 {
        font-size: 1.8rem;
        margin-bottom: 8px;
    }
    
    .welcome-section p {
        font-size: 14px;
    }
    
    /* Summary - Mobile */
    .resumen {
        font-size: 14px;
        padding: 15px;
        margin-bottom: 20px;
        flex-wrap: wrap;
        text-align: center;
    }
    
    /* Input Section - Mobile */
    .input-section {
        flex-direction: column;
        gap: 12px;
        padding: 15px;
        margin-bottom: 20px;
    }
    
    #descripcionTarea {
        width: 100%;
        font-size: 16px; /* Prevent zoom on iOS */
        padding: 14px 16px;
    }
    
    #agregarTarea {
        width: 100%;
        padding: 14px 20px;
        font-size: 16px;
        justify-content: center;
        min-width: unset;
    }
    
    .btn-storage-info {
        width: 45px;
        height: 45px;
        font-size: 14px;
    }
    
    /* Task Sections - Mobile */
    .seccion-tareas {
        padding: 15px 10px;
        margin-bottom: 25px;
    }
    
    .titulo-seccion {
        font-size: 1.3rem;
        margin-bottom: 15px;
        text-align: center;
    }
    
    /* Tables on Mobile - Stack layout */
    table {
        display: block;
        width: 100%;
        border: none;
        box-shadow: none;
    }
    
    thead {
        display: none; /* Hide headers on mobile */
    }
    
    tbody {
        display: block;
    }
    
    tr {
        display: block;
        background: rgba(255, 255, 255, 0.9);
        margin-bottom: 15px;
        border-radius: 12px;
        padding: 15px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        border: 2px solid var(--glass-border);
    }
    
    td {
        display: block;
        padding: 8px 0;
        border: none;
        text-align: left;
        position: relative;
        padding-left: 100px;
    }
    
    /* Add labels for mobile */
    td:before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        width: 90px;
        padding-right: 10px;
        white-space: nowrap;
        font-weight: 600;
        color: var(--text-secondary);
        font-size: 12px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    
    .id-cell:before { content: "ID:"; }
    .tarea-cell:before { content: "Task:"; }
    .edit-cell:before { content: "Edit:"; }
    .fecha-cell:before { content: "Date:"; }
    .checkbox-cell:before { content: "Action:"; }
    .eliminar-cell:before { content: "Delete:"; }
    
    /* Buttons on mobile */
    .btn-completar, .btn-eliminar, .btn-desmarcar {
        padding: 8px 15px;
        font-size: 13px;
        margin: 5px 5px 5px 0;
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }
    
    /* Mobile Modal */
    .modal-content {
        width: 95%;
        max-width: none;
        margin: 20px;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    .modal-header {
        padding: 20px;
        flex-direction: row;
    }
    
    .modal-header h3 {
        font-size: 18px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .modal-footer {
        flex-direction: column;
        gap: 10px;
        padding: 20px;
    }
    
    .btn-clean-old, .btn-modal-close {
        width: 100%;
        justify-content: center;
    }
    
    /* Alert responsive design */
    .storage-alert {
        margin: 15px 10px;
        padding: 15px;
    }
    
    .alert-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .alert-actions {
        justify-content: center;
        width: 100%;
        flex-wrap: wrap;
    }
    
    .btn-alert-action {
        flex: 1;
        min-width: 140px;
        justify-content: center;
    }
    
    /* Footer responsive */
    .app-footer {
        padding: 15px;
        font-size: 12px;
        text-align: center;
    }
    
    /* Empty table message */
    .tabla-vacia {
        padding: 30px 15px;
        font-size: 14px;
    }
    
    /* Task status badges on mobile */
    .estado-realizado {
        display: block;
        margin: 8px 0 0 0;
        text-align: center;
        width: fit-content;
    }
    
    .texto-tachado {
        display: block;
        margin-bottom: 8px;
    }
}

/* Extra Small Mobile - iPhone SE and smaller (max 375px) */
@media (max-width: 375px) {
    .welcome-section h1 {
        font-size: 1.6rem;
    }
    
    .container {
        padding: 8px;
    }
    
    .input-section {
        padding: 12px;
    }
    
    td {
        padding-left: 80px;
        font-size: 13px;
    }
    
    td:before {
        width: 70px;
        font-size: 11px;
    }
    
    .btn-completar, .btn-eliminar, .btn-desmarcar {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .modal-content {
        width: 98%;
        margin: 10px;
    }
}