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

:root {
    /* Colores sobrios y profesionales */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f9fafb;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #dbeafe;
    --border: #e5e7eb;
    --border-dark: #d1d5db;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --sidebar-width: 260px;
    --sidebar-bg: #ffffff;
    --sidebar-border: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Layout con Sidebar */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s ease;
    display: block !important;
    visibility: visible !important;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    padding: 0.5rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.nav-item {
    display: block;
    padding: 0.625rem 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.nav-item.active {
    background: var(--accent-light);
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 500;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.content-wrapper {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Login (mantener estilo existente pero adaptado) */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-primary);
}

.login-box {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.login-box h1 {
    text-align: center;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 400;
}

/* Container principal (para compatibilidad) */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header (compatibilidad) */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

header h1 {
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 700;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#usernameDisplay {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Formularios */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* Botones */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    border: 1px solid transparent;
}

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

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

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

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

.btn-danger {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-danger:hover {
    background: #dc2626;
    border-color: #dc2626;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* Sección principal */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

/* Mensajes */
.error-message {
    background: var(--danger-light);
    border: 1px solid var(--danger);
    color: #991b1b;
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: none;
}

.error-message.show {
    display: block;
}

.success-message {
    background: var(--success-light);
    border: 1px solid var(--success);
    color: #065f46;
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: none;
}

.success-message.show {
    display: block;
}

/* Tabla */
.table-container {
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    margin-top: 1.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--bg-tertiary);
}

th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.9375rem;
}

tbody tr:hover {
    background: var(--bg-tertiary);
}

tbody tr:last-child td {
    border-bottom: none;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem !important;
}

/* Input editable en tabla */
.qty-input {
    width: 80px;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    text-align: center;
}

.qty-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.qty-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.qty-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

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

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.close:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

#modalTitle {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

/* Acciones en tabla */
.actions-cell {
    display: flex;
    gap: 0.5rem;
}

/* Navegación (compatibilidad) */
.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-light);
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* Resumen de finanzas */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    text-align: center;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.summary-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.summary-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
}

/* Filtros */
.filters-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.filters-card h3 {
    color: var(--text-primary);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    align-items: end;
}

.filter-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color 0.2s;
}

.filter-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

/* Categorías */
.categories-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.categories-card h3 {
    color: var(--text-primary);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.categories-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border-left: 3px solid var(--accent);
}

.category-name {
    font-weight: 500;
    color: var(--text-primary);
}

.category-amount {
    font-weight: 600;
    color: var(--accent);
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
    font-size: 0.9375rem;
}

.amount-cell {
    font-weight: 600;
    color: var(--accent);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-primary {
    background-color: var(--accent-light);
    color: var(--accent);
}

.badge-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-success {
    background-color: var(--success-light);
    color: #065f46;
}

.badge-warning {
    background-color: var(--warning-light);
    color: #92400e;
}

.badge-danger {
    background-color: var(--danger-light);
    color: #991b1b;
}

/* Dashboard específico */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.dashboard-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.dashboard-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}

.dashboard-card-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.dashboard-card-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        display: block !important;
        visibility: visible !important;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-wrapper {
        padding: 1rem;
    }
    
    .container {
        padding: 1rem;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
    }

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

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .table-container {
        overflow-x: auto;
    }

    table {
        min-width: 600px;
    }

    .summary-cards {
        grid-template-columns: 1fr;
    }

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

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 101;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
}