/* ============================================
   VARIABLES Y RESET
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colores principales - Paleta azul profesional */
    --primary-blue: #1976D2;
    --primary-dark: #0D47A1;
    --primary-light: #42A5F5;
    --accent-blue: #2196F3;
    --accent-cyan: #00BCD4;
    
    /* Colores de estado */
    --success: #4CAF50;
    --warning: #FF9800;
    --error: #F44336;
    --info: #2196F3;
    
    /* Grises */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-400: #BDBDBD;
    --gray-500: #9E9E9E;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* Espaciado */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 30px;
    
    /* Bordes */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 15px;
    --radius-xl: 20px;
    
    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.18);
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   ESTILOS BASE
   ============================================ */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0D47A1 0%, #1976D2 50%, #2196F3 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    text-align: center;
    color: white;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    animation: fadeInDown 0.6s ease;
}

.header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.5px;
}

.header h1 i {
    margin-right: var(--spacing-md);
    color: var(--accent-cyan);
}

.header p {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
}

.last-update {
    font-size: 0.9rem;
    opacity: 0.85;
    font-weight: 300;
}

/* ============================================
   TABS NAVIGATION
   ============================================ */
.tabs-container {
    margin-bottom: var(--spacing-xl);
    animation: fadeIn 0.8s ease;
}

.tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: 8px;
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.tab-button {
    background: transparent;
    border: none;
    color: white;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.75;
    position: relative;
    overflow: hidden;
}

.tab-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.tab-button:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.tab-button:hover::before {
    left: 100%;
}

.tab-button.active {
    background: white;
    color: var(--primary-blue);
    opacity: 1;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    font-weight: 600;
}

.tab-button.active i {
    color: var(--accent-cyan);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

/* ============================================
   DASHBOARD GRID
   ============================================ */
.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-100);
}

.card-header i {
    font-size: 2.2rem;
    margin-right: var(--spacing-md);
    padding: 14px;
    border-radius: var(--radius-md);
    color: white;
    box-shadow: var(--shadow-sm);
}

.card-header h3 {
    font-size: 1.5rem;
    color: var(--gray-800);
    flex-grow: 1;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.card-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    background: var(--primary-blue);
    color: white;
    border: none;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-icon:hover {
    background: var(--primary-dark);
    transform: scale(1.08);
    box-shadow: var(--shadow-md);
}

.btn-icon:active {
    transform: scale(0.95);
}

/* Colores específicos de cards */
.status-card .card-header i {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
}

.actions-card .card-header i {
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
}

.filters-card .card-header i {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-blue));
}

.reports-card .card-header i {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
}

.clientes-card .card-header i {
    background: linear-gradient(135deg, #3F51B5, var(--primary-dark));
}

.facturacion-filters-card .card-header i {
    background: linear-gradient(135deg, #5C6BC0, #3949AB);
}

.facturacion-resumen-card .card-header i {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-blue));
}

.generate-individual-card .card-header i {
    background: linear-gradient(135deg, #29B6F6, var(--accent-blue));
}

.generate-all-card .card-header i {
    background: linear-gradient(135deg, var(--accent-cyan), #0097A7);
}

/* ============================================
   SYSTEM STATUS
   ============================================ */
.system-status {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary-blue);
    transition: all var(--transition-fast);
}

.status-item:hover {
    background: var(--gray-100);
    transform: translateX(4px);
}

.status-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.status-indicator.online {
    color: var(--success);
}

.status-indicator.offline {
    color: var(--error);
}

.status-indicator.warning {
    color: var(--warning);
}

.status-indicator i {
    font-size: 0.7rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    width: 100%;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(25, 118, 210, 0.4);
}

.btn:active {
    transform: translateY(-1px);
}

.btn:disabled {
    background: var(--gray-400);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--success), #388E3C);
}

.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--gray-600), var(--gray-700));
}

.btn-secondary:hover {
    box-shadow: 0 8px 25px rgba(97, 97, 97, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, var(--accent-cyan), #0097A7);
}

.btn-info:hover {
    box-shadow: 0 8px 25px rgba(0, 188, 212, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--error), #D32F2F);
}

.btn-danger:hover {
    box-shadow: 0 8px 25px rgba(244, 67, 54, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #2E7D32);
}

.btn-success:hover {
    box-shadow: 0 8px 25px rgba(67, 160, 71, 0.4);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
    border-radius: 6px;
    width: auto;
    margin: 0;
}

/* ============================================
   FILTERS SECTION
   ============================================ */
.filters-section {
    margin-bottom: var(--spacing-xl);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.input-group input,
.input-group select,
.input-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: all var(--transition-normal);
    background: white;
    font-family: inherit;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(25, 118, 210, 0.1);
    background: var(--gray-50);
}

.input-group input:hover,
.input-group select:hover,
.input-group textarea:hover {
    border-color: var(--primary-light);
}

.input-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* ============================================
   VIEW TOGGLE
   ============================================ */
.view-toggle {
    display: flex;
    gap: 6px;
    background: var(--gray-100);
    padding: 4px;
    border-radius: var(--radius-sm);
}

.btn-toggle {
    background: transparent;
    border: none;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-toggle:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-toggle.active {
    background: var(--primary-blue);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* ============================================
   REPORTS GRID
   ============================================ */
.reports-section {
    margin-bottom: var(--spacing-xl);
}

.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-lg);
    min-height: 200px;
}

.report-item {
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.report-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: var(--success);
    transition: width var(--transition-normal);
}

.report-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.report-item:hover::before {
    width: 100%;
    opacity: 0.05;
}

.report-item.completed::before {
    background: var(--success);
}

.report-item.pending::before {
    background: var(--warning);
}

.report-item.error::before {
    background: var(--error);
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.report-period {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-800);
}

.report-status {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.report-status.completed {
    background: linear-gradient(135deg, #C8E6C9, #A5D6A7);
    color: #2E7D32;
}

.report-status.pending {
    background: linear-gradient(135deg, #FFE082, #FFD54F);
    color: #F57F17;
}

.report-status.error {
    background: linear-gradient(135deg, #FFCDD2, #EF9A9A);
    color: #C62828;
}

/* Client Info in Report */
.report-client-info {
    background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    border-radius: var(--radius-sm);
    padding: 14px;
    margin: var(--spacing-sm) 0;
    border-left: 4px solid var(--primary-blue);
}

.client-name {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 1.05rem;
    color: var(--gray-900);
    font-weight: 600;
}

.client-name i {
    color: var(--primary-blue);
}

.client-details {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--gray-600);
}

.client-nit {
    font-weight: 600;
}

.client-razon {
    font-style: italic;
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.summary-item {
    text-align: center;
    padding: 14px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.summary-item:hover {
    background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
    transform: scale(1.05);
}

.summary-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: block;
    line-height: 1.2;
}

.summary-label {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-top: 4px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.report-date {
    text-align: center;
    color: var(--gray-600);
    font-size: 0.875rem;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--gray-200);
}

/* ============================================
   REPORTS TABLE
   ============================================ */
.reports-table-container {
    overflow-x: auto;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.reports-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.reports-table th,
.reports-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.reports-table th {
    background: linear-gradient(135deg, var(--gray-100), var(--gray-50));
    font-weight: 700;
    color: var(--gray-800);
    font-size: 0.875rem;
    position: sticky;
    top: 0;
    z-index: 10;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.reports-table tr {
    transition: all var(--transition-fast);
}

.reports-table tr:hover {
    background: var(--gray-50);
    transform: scale(1.01);
}

.client-info-table strong {
    display: block;
    color: var(--gray-900);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.client-info-table small {
    color: var(--gray-600);
    font-size: 0.8rem;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
}

.status-badge.completed {
    background: linear-gradient(135deg, #C8E6C9, #A5D6A7);
    color: #2E7D32;
}

.status-badge.pending {
    background: linear-gradient(135deg, #FFE082, #FFD54F);
    color: #F57F17;
}

.status-badge.error {
    background: linear-gradient(135deg, #FFCDD2, #EF9A9A);
    color: #C62828;
}

.status-badge.active {
    background: linear-gradient(135deg, #C8E6C9, #A5D6A7);
    color: #2E7D32;
}

.status-badge.inactive {
    background: linear-gradient(135deg, #FFCDD2, #EF9A9A);
    color: #C62828;
}

.number-cell,
.percentage-cell,
.currency-cell {
    text-align: right;
    font-weight: 600;
    color: var(--gray-800);
}

.actions-cell {
    text-align: center;
}

.empty-state-table {
    padding: 60px 20px;
    text-align: center;
    color: var(--gray-500);
}

.empty-state-table i {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

/* ============================================
   CLIENTES GRID
   ============================================ */
.clientes-section {
    margin-bottom: var(--spacing-xl);
}

.clientes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-lg);
    min-height: 200px;
}

.cliente-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border-left: 5px solid var(--success);
}

.cliente-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.cliente-item.inactive {
    border-left-color: var(--error);
    opacity: 0.7;
}

.cliente-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-100);
}

.cliente-header h4 {
    margin: 0;
    color: var(--gray-900);
    font-size: 1.3rem;
    font-weight: 700;
}

.cliente-status {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cliente-status.active {
    background: linear-gradient(135deg, #C8E6C9, #A5D6A7);
    color: #2E7D32;
}

.cliente-status.inactive {
    background: linear-gradient(135deg, #FFCDD2, #EF9A9A);
    color: #C62828;
}

.cliente-info p {
    margin: 10px 0;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.cliente-info strong {
    color: var(--gray-900);
    font-weight: 600;
}

.cliente-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-md);
}

/* ============================================
   FACTURACION
   ============================================ */
.facturacion-section {
    margin-bottom: var(--spacing-xl);
}

.facturacion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.facturacion-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border-left: 5px solid var(--primary-blue);
    margin-bottom: var(--spacing-lg);
}

.facturacion-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.facturacion-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-100);
}

.cliente-info h4 {
    margin: 0 0 6px 0;
    color: var(--gray-900);
    font-size: 1.3rem;
    font-weight: 700;
}

.cliente-info p {
    margin: 0 0 4px 0;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.cliente-info small {
    color: var(--gray-500);
    font-size: 0.85rem;
}

.facturacion-status {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.facturacion-status.active {
    background: linear-gradient(135deg, #C8E6C9, #A5D6A7);
    color: #2E7D32;
}

.facturacion-status.inactive {
    background: linear-gradient(135deg, #FFCDD2, #EF9A9A);
    color: #C62828;
}

.facturacion-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.facturacion-summary .summary-item {
    text-align: center;
    padding: 14px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.facturacion-summary .summary-item:hover {
    background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
    transform: scale(1.05);
}

.facturacion-summary .summary-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 6px;
}

.facturacion-summary .summary-label {
    font-size: 0.8rem;
    color: var(--gray-600);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.facturacion-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* ============================================
   LOADING & STATES
   ============================================ */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    color: var(--primary-blue);
}

.loading-spinner i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--gray-500);
    text-align: center;
}

.empty-state i {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--gray-700);
    font-size: 1.5rem;
}

.empty-state p {
    max-width: 500px;
    line-height: 1.6;
    color: var(--gray-600);
}

.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--error);
    text-align: center;
}

.error-state i {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.7;
}

.error-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--gray-800);
    font-size: 1.5rem;
}

.error-state p {
    max-width: 500px;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-600);
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 71, 161, 0.6);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    margin: 3% auto;
    width: 90%;
    max-width: 900px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: slideInUp 0.4s ease;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    border: 2px solid var(--gray-200);
}

.large-modal .modal-content {
    max-width: 90vw;
    width: 1200px;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 2px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--gray-50), white);
}

.modal-header h3 {
    margin: 0;
    color: var(--gray-900);
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    background: var(--gray-200);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-600);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--error);
    color: white;
    transform: rotate(90deg);
}

.modal-body {
    padding: var(--spacing-xl);
    overflow-y: auto;
    flex-grow: 1;
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 2px solid var(--gray-100);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, white, var(--gray-50));
}

.modal-footer .btn {
    width: auto;
    margin: 0;
}

/* ============================================
   REPORT DETAIL
   ============================================ */
.report-detail-container {
    max-width: 100%;
}

.report-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--primary-blue);
    box-shadow: var(--shadow-sm);
}

.report-section h4 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
}

.client-section {
    background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border-left: 6px solid var(--primary-blue);
    margin-bottom: var(--spacing-xl);
}

.client-section h4 {
    color: var(--primary-dark);
}

.client-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.client-detail-item {
    background: white;
    padding: 14px;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary-blue);
    transition: all var(--transition-fast);
}

.client-detail-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.client-detail-item strong {
    display: block;
    margin-bottom: 6px;
    color: var(--primary-blue);
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.client-detail-item span {
    color: var(--gray-800);
    font-size: 1rem;
    font-weight: 500;
}

.report-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.metric-card {
    background: var(--gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    text-align: center;
    border: 2px solid var(--gray-200);
    transition: all var(--transition-normal);
}

.metric-card:hover {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.metric-value {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: block;
    margin-bottom: 8px;
}

.metric-label {
    color: var(--gray-600);
    font-size: 0.9rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.document-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.document-detail-card {
    background: var(--gray-50);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border-left: 5px solid var(--success);
}

.document-detail-card h5 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--gray-900);
    font-size: 1.1rem;
    font-weight: 700;
}

.detail-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.detail-metrics div {
    background: white;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
    font-weight: 500;
}

.report-detail {
    font-family: 'Courier New', 'Consolas', monospace;
    background: var(--gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    white-space: pre-line;
    line-height: 1.8;
    font-size: 0.9rem;
    border: 2px solid var(--gray-200);
    max-height: 500px;
    overflow-y: auto;
    color: var(--gray-800);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1100;
    max-width: 420px;
}

.toast {
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    animation: slideInRight 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    max-width: 420px;
    border: 2px solid var(--gray-200);
}

.toast-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.toast-title {
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
}

.toast-body {
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-700);
    line-height: 1.5;
    font-size: 0.95rem;
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--gray-500);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.toast-close:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.toast.success {
    border-left: 6px solid var(--success);
}

.toast.success .toast-title {
    color: var(--success);
}

.toast.error {
    border-left: 6px solid var(--error);
}

.toast.error .toast-title {
    color: var(--error);
}

.toast.warning {
    border-left: 6px solid var(--warning);
}

.toast.warning .toast-title {
    color: var(--warning);
}

.toast.info {
    border-left: 6px solid var(--info);
}

.toast.info .toast-title {
    color: var(--info);
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* ============================================
   SEARCH SECTION
   ============================================ */
.search-section {
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.18);
    margin-bottom: var(--spacing-lg);
}

.search-input-group {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.search-input-group i.fa-search {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-blue);
    pointer-events: none;
    font-size: 1.1rem;
}

.search-input-group input {
    width: 100%;
    padding: 16px 55px 16px 55px;
    border: 2px solid var(--gray-300);
    border-radius: 30px;
    font-size: 1rem;
    transition: all var(--transition-normal);
    background: white;
    box-shadow: var(--shadow-sm);
}

.search-input-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 5px rgba(25, 118, 210, 0.12);
    transform: translateY(-2px);
}

.btn-icon-clear {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all var(--transition-fast);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon-clear:hover {
    background: var(--gray-200);
    color: var(--error);
    transform: translateY(-50%) rotate(90deg);
}

.search-results-info {
    margin-top: var(--spacing-sm);
    text-align: center;
    color: white;
    font-size: 0.95rem;
    font-weight: 500;
}

.search-highlight {
    background: linear-gradient(135deg, #FFF59D, #FFF176);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    color: var(--gray-900);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.d-flex { display: flex; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }
.gap-10 { gap: 10px; }
.gap-15 { gap: 15px; }
.gap-20 { gap: 20px; }
.mb-10 { margin-bottom: 10px; }
.mb-15 { margin-bottom: 15px; }
.mb-20 { margin-bottom: 20px; }
.mt-10 { margin-top: 10px; }
.mt-15 { margin-top: 15px; }
.mt-20 { margin-top: 20px; }
.p-10 { padding: 10px; }
.p-15 { padding: 15px; }
.p-20 { padding: 20px; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1200px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .dashboard {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
    
    .large-modal .modal-content {
        width: 95vw;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 20px;
        --spacing-lg: 15px;
    }
    
    .container {
        padding: var(--spacing-sm);
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab-button {
        width: 100%;
        justify-content: center;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .filters-grid {
        grid-template-columns: 1fr;
    }
    
    .reports-grid,
    .clientes-grid,
    .facturacion-grid {
        grid-template-columns: 1fr;
    }
    
    .report-summary {
        grid-template-columns: 1fr;
    }
    
    .client-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .facturacion-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .facturacion-summary {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-lg);
    }
    
    .reports-table {
        font-size: 0.85rem;
    }
    
    .reports-table th,
    .reports-table td {
        padding: 10px 8px;
    }
    
    .view-toggle {
        flex-direction: column;
        width: 100%;
        gap: 6px;
    }
    
    .btn-toggle {
        width: 100%;
        text-align: center;
        justify-content: center;
    }
    
    .report-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .document-details-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-metrics {
        grid-template-columns: 1fr;
    }
    
    .search-input-group {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.6rem;
    }
    
    .header p {
        font-size: 0.9rem;
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .card-header i {
        margin: 0;
    }
    
    .status-item {
        flex-direction: column;
        text-align: center;
        gap: 6px;
    }
    
    .report-header,
    .cliente-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .cliente-actions,
    .facturacion-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .btn-sm {
        width: 100%;
    }
    
    .report-summary,
    .facturacion-summary {
        grid-template-columns: 1fr;
    }
    
    .report-metrics {
        grid-template-columns: 1fr;
    }
    
    .toast {
        margin: 0 var(--spacing-sm) var(--spacing-sm) var(--spacing-sm);
        max-width: calc(100vw - 40px);
    }
    
    .toast-container {
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .header,
    .tabs-container,
    .card-actions,
    .btn,
    .modal,
    .toast-container,
    .search-section {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
        page-break-inside: avoid;
    }
    
    .report-detail {
        background: white;
        border: 1px solid var(--gray-300);
    }
}

/* ============================================
   SCROLLBAR PERSONALIZADO
   ============================================ */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    border-radius: 10px;
    border: 2px solid var(--gray-100);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), #0D47A1);
}

/* ============================================
   ANIMACIONES ADICIONALES
   ============================================ */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading-spinner i {
    animation: spin 1s linear infinite, pulse 2s ease-in-out infinite;
}

/* Animación de entrada para cards */
.card {
    animation: fadeInUp 0.6s ease backwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

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

.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
    border-top: 2px solid var(--gray-100);
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.pagination-info {
    color: var(--gray-700);
    font-size: 0.95rem;
    font-weight: 500;
}

.pagination-info strong {
    color: var(--primary-blue);
    font-weight: 700;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-pagination {
    background: white;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
}

.btn-pagination:hover:not(:disabled) {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
    transform: scale(1.1);
}

.btn-pagination:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.pagination-pages {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-page {
    background: white;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.btn-page:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    color: white;
    transform: translateY(-2px);
}

.btn-page.active {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
    box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

.pagination-ellipsis {
    color: var(--gray-500);
    padding: 0 8px;
    font-weight: 700;
}

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

.pagination-size label {
    color: var(--gray-700);
    font-weight: 600;
    font-size: 0.95rem;
}

.pagination-size select {
    padding: 10px 14px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: white;
    color: var(--gray-700);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.pagination-size select:hover {
    border-color: var(--primary-blue);
}

.pagination-size select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

/* Responsive para paginación */
@media (max-width: 768px) {
    .pagination-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .pagination-info {
        width: 100%;
        text-align: center;
    }
    
    .pagination-controls {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .pagination-size {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .btn-pagination,
    .btn-page {
        width: 36px;
        height: 36px;
        min-width: 36px;
        font-size: 0.85rem;
    }
    
    .pagination-pages {
        gap: 4px;
    }
}