/* Google Fonts - Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0052cc;
    --primary-hover: #0747a6;
    --primary-light: #deebff;
    --secondary: #0ea5e9;
    --secondary-hover: #0284c7;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --success: #10b981;
    --success-light: #d1fae5;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 260px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

/* --- AUTENTICACIÓN (Login / Registro) --- */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: radial-gradient(circle at 10% 20%, rgba(216, 241, 230, 0.46) 0.1%, rgba(233, 226, 226, 0.28) 90.1%), linear-gradient(135deg, #e0e7ff 0%, #f1f5f9 100%);
}

.auth-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    padding: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

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

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-primary);
    background-color: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background-color: #fff;
    box-shadow: 0 0 0 4px var(--primary-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--border-hover);
    transform: translateY(-1px);
}

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

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-block {
    display: flex;
    width: 100%;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Mensajes Flash */
.flash-message {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    border-left: 4px solid transparent;
}

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

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

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

/* --- DISEÑO DEL PANEL PRINCIPAL (Dashboard Layout) --- */
.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: #0f172a; /* Slate 900 */
    color: #f8fafc;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-logo {
    padding: 1.5rem 2rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid #1e293b;
}

.sidebar-menu {
    list-style: none;
    padding: 1.5rem 1rem;
    flex-grow: 1;
}

.sidebar-item {
    margin-bottom: 0.5rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: #94a3b8;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: var(--transition);
    gap: 0.75rem;
}

.sidebar-link:hover, .sidebar-link.active {
    background-color: #1e293b;
    color: #fff;
}

.sidebar-link.active {
    border-left: 3px solid var(--primary);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.sidebar-footer {
    padding: 1.5rem 1rem;
    border-top: 1px solid #1e293b;
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.user-info {
    overflow: hidden;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.user-role {
    font-size: 0.75rem;
    color: #64748b;
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

/* Header */
.app-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 90;
    box-shadow: var(--shadow-sm);
}

.header-title h2 {
    font-size: 1.3rem;
    font-weight: 600;
}

.header-widgets {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.uf-widget {
    background-color: var(--primary-light);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.date-widget {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Page Container */
.page-container {
    padding: 2rem;
    flex-grow: 1;
    max-width: 1400px;
    width: 100%;
    align-self: center;
}

/* --- COMPONENTES DE UI --- */

/* Grid de métricas */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.metric-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--primary);
}

.metric-card.sec::after { background-color: var(--secondary); }
.metric-card.suc::after { background-color: var(--success); }
.metric-card.wrn::after { background-color: var(--warning); }

.metric-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Tarjetas y Contenedores */
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.card-body {
    padding: 1.5rem;
}

/* Acciones en la cabecera */
.header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-filter-box {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}

/* Tablas */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.table th {
    background-color: var(--bg-main);
    color: var(--text-secondary);
    padding: 1rem;
    font-weight: 600;
    border-bottom: 2px solid var(--border);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    vertical-align: middle;
}

.table tr:hover {
    background-color: rgba(248, 250, 252, 0.8);
}

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

.action-btn {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    background-color: #fff;
    cursor: pointer;
    transition: var(--transition);
}

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

.action-btn.btn-delete:hover {
    background-color: var(--danger-light);
    color: var(--danger);
    border-color: var(--danger);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background-color: var(--success-light); color: #065f46; }
.badge-danger { background-color: var(--danger-light); color: #991b1b; }
.badge-warning { background-color: var(--warning-light); color: #92400e; }
.badge-info { background-color: var(--info-light); color: #1d4ed8; }

/* Modales / Formularios de edición rápida */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 600px;
    overflow: hidden;
}

/* --- VISTA DE DETALLE E IMPRESIÓN --- */
.invoice-container {
    background-color: #fff;
    padding: 3rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    border-bottom: 2px solid var(--border);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}

.invoice-meta {
    text-align: right;
}

.invoice-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.invoice-section-title {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
}

.invoice-summary {
    margin-top: 2rem;
    margin-left: auto;
    width: 320px;
    border-top: 2px solid var(--border);
    padding-top: 1rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

.summary-row.total {
    font-weight: 700;
    font-size: 1.2rem;
    border-top: 1px solid var(--border);
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    color: var(--primary);
}

/* Estilos de Impresión */
@media print {
    body {
        background-color: #fff;
        color: #000;
    }
    .sidebar, .app-header, .header-actions, .btn-print-hide {
        display: none !important;
    }
    .main-content {
        margin-left: 0 !important;
    }
    .page-container {
        padding: 0;
    }
    .invoice-container {
        box-shadow: none;
        border: none;
        padding: 0;
    }
}

/* Responsividad general */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .app-header {
        padding: 1rem;
    }
    .page-container {
        padding: 1rem;
    }
}