:root {
    --bg-primary: #0f1923;
    --bg-secondary: #1a2332;
    --bg-card: #1e2d3d;
    --bg-hover: #243447;
    --bg-input: #16202e;
    --text-primary: #e0e6ed;
    --text-secondary: #8899aa;
    --text-muted: #5a6a7a;
    --border-color: #2a3a4a;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-secondary: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #06b6d4;
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --header-height: 60px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* estilos agregados por cec */
#buscarArticulo::placeholder {
    color: #898a8b;
    /* opacity: 1; */
}

input[name="numero_comprobante"]::placeholder {
    color: #898a8b;
    /* opacity: 1; Esto es clave porque algunos navegadores (como Firefox) le bajan la opacidad por defecto */
}

.input-blanco::placeholder {
    color: #898a8b;
    /* opacity: 1; */
}

/* Color de fondo para la tabla inferior */
#tablaTotal th, #tablaItems2 td {
    background-color: #afb4ff !important; /* Reemplaza por el otro color */
}
/* fin de estilos agregados por cec */

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    transition: var(--transition);
    z-index: 1000;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 15px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-card);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
    background: #000000;;
    padding: 2px;
    flex-shrink: 0;
}

.brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-primary);
    white-space: nowrap;
    overflow: hidden;
    transition: var(--transition);
}

.sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
}

/* ===== SIDEBAR MENU ===== */
.sidebar-menu {
    padding: 10px 0;
    list-style: none;
}

.menu-item {
    position: relative;
}

.menu-link {
    display: flex;
    align-items: center;
    padding: 12px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    border-left: 3px solid transparent;
    cursor: pointer;
}

.menu-link:hover,
.menu-link.active {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-left-color: var(--accent-primary);
}

.menu-icon {
    font-size: 1.2rem;
    width: 30px;
    text-align: center;
    flex-shrink: 0;
}

.menu-text {
    margin-left: 12px;
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    transition: var(--transition);
}

.sidebar.collapsed .menu-text {
    opacity: 0;
    width: 0;
    margin-left: 0;
}

.menu-badge {
    margin-left: auto;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--accent-primary);
    color: white;
}

.sidebar.collapsed .menu-badge {
    display: none;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: var(--transition);
}

.sidebar.collapsed + .main-content {
    margin-left: var(--sidebar-collapsed);
}

/* ===== TOP HEADER ===== */
.top-header {
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 5px;
}

.header-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-dropdown .dropdown-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== CONTENT AREA ===== */
.content-area {
    padding: 20px;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 20px;
}

.card-header {
    background: rgba(59, 130, 246, 0.08);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 20px;
    border-radius: 12px 12px 0 0 !important;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.card-body {
    padding: 20px;
}

/* ===== TABLE ===== */
.table-container {
    overflow-x: auto;
}

.table {
    color: var(--text-primary);
    margin-bottom: 0;
    width: 100%;
}

.table thead th {
    background: var(--bg-hover);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 15px;
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.table tbody td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    font-size: 0.9rem;
}

.table tbody tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

/* ===== BUTTONS ===== */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 8px 16px;
    transition: var(--transition);
}

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

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

.btn-success {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

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

.btn-warning {
    background: var(--accent-warning);
    border-color: var(--accent-warning);
    color: #000;
}

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

.btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.btn-action {
    padding: 4px 8px;
    margin: 0 2px;
}

/* ===== FORMS ===== */
.form-control, .form-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 10px 14px;
}

.form-control:focus, .form-select:focus {
    background: var(--bg-input);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    margin-bottom: 6px;
}

.input-group-text {
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ===== STATS CARDS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: rgba(59, 130, 246, 0.15); color: var(--accent-primary); }
.stat-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--accent-secondary); }
.stat-icon.orange { background: rgba(245, 158, 11, 0.15); color: var(--accent-warning); }
.stat-icon.red { background: rgba(239, 68, 68, 0.15); color: var(--accent-danger); }
.stat-icon.cyan { background: rgba(6, 182, 212, 0.15); color: var(--accent-info); }

.stat-details h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

.stat-details p {
    font-size: 0.82rem;
    margin: 0;
    color: var(--text-secondary);
}

/* ===== PAGINATION ===== */
.pagination {
    gap: 5px;
}

.page-link {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 6px 12px;
}

.page-link:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.page-item.active .page-link {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* ===== MODAL ===== */
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
}

.btn-close {
    filter: invert(1);
}

/* Scroll vertical forzado para modales grandes */
#articuloModal .modal-dialog,
#compraModal .modal-dialog {
    max-height: 90vh;
}

#articuloModal .modal-body,
#compraModal .modal-body {
    max-height: calc(90vh - 130px);
    overflow-y: auto;
}

/* ===== DROPDOWN ===== */
.dropdown-menu {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.dropdown-item {
    color: var(--text-primary);
}

.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ===== TOAST ===== */
.toast-container {
    z-index: 9999;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        width: var(--sidebar-collapsed);
    }
    .sidebar .brand-text,
    .sidebar .menu-text {
        opacity: 0;
        width: 0;
        margin-left: 0;
    }
    .main-content {
        margin-left: var(--sidebar-collapsed);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .content-area {
        padding: 10px;
    }
}

@media (max-width: 576px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .header-title {
        font-size: 0.9rem;
    }
    .table tbody td {
        padding: 8px 10px;
        font-size: 0.85rem;
    }
}

/* ===== PRINT ===== */
@media print {
    .sidebar, .top-header, .btn {
        display: none !important;
    }
    .main-content {
        margin-left: 0;
    }
}

/* ===== LOADING ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 25, 35, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    border-color: var(--accent-primary);
    border-right-color: transparent;
}

/* ===== SEARCH BOX ===== */
.search-box {
    position: relative;
}

.search-box .form-control {
    padding-left: 40px;
}

.search-box .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* ===== FILTER ROW ===== */
.filter-row {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: end;
}

/* ===== POS STYLES ===== */
.pos-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 15px;
    height: calc(100vh - 100px);
}

.pos-left {
    overflow-y: auto;
}

.pos-right {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.pos-totals {
    margin-top: auto;
    border-top: 2px solid var(--border-color);
    padding-top: 15px;
}

.total-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 1rem;
}

.total-row.grand-total {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-secondary);
    border-top: 2px solid var(--border-color);
    margin-top: 10px;
    padding-top: 15px;
}

/* ===== SELECT2 DARK ===== */
.select2-container--default .select2-selection--single,
.select2-container--default .select2-selection--multiple {
    background: var(--bg-input) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: 8px !important;
    min-height: 42px;
}

.select2-container--default .select2-selection__rendered {
    color: var(--text-primary) !important;
    line-height: 42px !important;
    padding-left: 14px !important;
}

.select2-container--default .select2-selection__arrow {
    height: 42px !important;
}

.select2-dropdown {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
}

.select2-container--default .select2-results__option {
    color: var(--text-primary) !important;
    padding: 10px 14px !important;
}

.select2-container--default .select2-results__option--highlighted {
    background: var(--accent-primary) !important;
}

.select2-container--default .select2-search--dropdown .select2-search__field {
    background: var(--bg-input) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: 6px !important;
}

/* ===== LOGIN PAGE ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
}

.login-box {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo img {
    width: 120px;
    height: 120px;
    border-radius: 16px;
    object-fit: contain;
    background: #000000;
    padding: 5px;
    margin-bottom: 15px;
}

.login-logo h2 {
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 1.5rem;
}

/* ===== PROGRESSIVE BALANCE ===== */
.balance-positive {
    color: var(--accent-secondary);
    font-weight: 600;
}

.balance-negative {
    color: var(--accent-danger);
    font-weight: 600;
}

/* ===== BADGES ===== */
.badge-soft-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-secondary);
}

.badge-soft-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-danger);
}

.badge-soft-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-warning);
}

.badge-soft-info {
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent-info);
}

/* ===== CHARTS ===== */
.chart-container {
    position: relative;
    height: 300px;
}