/**
 * Estilos del Sistema de Préstamos UASD
 * Color primario: #0e459a (Azul UASD)
 * Inspirado en el diseño de uasd.edu.do
 */

/* ============================================
   VARIABLES Y RESET
   ============================================ */
:root {
    --color-primario: #0e459a;
    --color-primario-oscuro: #0a3470;
    --color-primario-claro: #1a5fc4;
    --color-secundario: #f8f9fa;
    --color-texto: #333333;
    --color-texto-claro: #666666;
    --color-fondo: #f4f6f9;
    --color-blanco: #ffffff;
    --color-borde: #dee2e6;
    --color-exito: #28a745;
    --color-error: #dc3545;
    --color-advertencia: #ffc107;
    --color-info: #17a2b8;
    --sombra-suave: 0 2px 4px rgba(0, 0, 0, 0.1);
    --sombra-media: 0 4px 8px rgba(0, 0, 0, 0.15);
    --transicion: all 0.3s ease;
    --sidebar-ancho: 250px;
    --navbar-altura: 60px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-texto);
    background-color: var(--color-fondo);
    min-height: 100vh;
}

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

a:hover {
    color: var(--color-primario-oscuro);
}

/* ============================================
   NAVBAR SUPERIOR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-altura);
    background: linear-gradient(135deg, var(--color-primario) 0%, var(--color-primario-oscuro) 100%);
    color: var(--color-blanco);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
    box-shadow: var(--sombra-media);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.navbar-logo {
    height: 40px;
    width: auto;
    background: var(--color-blanco);
    border-radius: 4px;
    padding: 4px;
}

.navbar-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.navbar-username {
    font-size: 14px;
    opacity: 0.9;
}

/* User Dropdown Menu */
.user-dropdown {
    position: relative;
}

.user-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-blanco);
    padding: 6px 12px;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transicion);
}

.user-dropdown-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--color-blanco);
    color: var(--color-primario);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.dropdown-arrow {
    font-size: 10px;
    opacity: 0.8;
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-blanco);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1001;
    overflow: hidden;
}

.user-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--color-texto);
    text-decoration: none;
    transition: var(--transicion);
}

.dropdown-item:hover {
    background: var(--color-fondo);
    color: var(--color-primario);
}

.dropdown-item-danger:hover {
    background: #fff5f5;
    color: var(--color-error);
}

.dropdown-icon {
    font-size: 16px;
}

.dropdown-divider {
    height: 1px;
    background: var(--color-borde);
    margin: 4px 0;
}

/* ============================================
   CONTENEDOR PRINCIPAL
   ============================================ */
.main-container {
    display: flex;
    padding-top: var(--navbar-altura);
    min-height: 100vh;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--navbar-altura);
    bottom: 0;
    width: var(--sidebar-ancho);
    background: var(--color-blanco);
    border-right: 1px solid var(--color-borde);
    overflow-y: auto;
    z-index: 100;
}

.sidebar-nav {
    padding: 15px 0;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin: 2px 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--color-texto);
    font-size: 14px;
    transition: var(--transicion);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: var(--color-fondo);
    color: var(--color-primario);
    border-left-color: var(--color-primario);
}

.nav-link.active {
    background: rgba(14, 69, 154, 0.1);
    color: var(--color-primario);
    border-left-color: var(--color-primario);
    font-weight: 600;
}

.nav-icon {
    font-size: 16px;
    width: 24px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-icon svg {
    display: block;
}

.nav-divider {
    height: 1px;
    background: var(--color-borde);
    margin: 15px 20px;
}

.nav-header {
    padding: 10px 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-texto-claro);
    letter-spacing: 1px;
}

.nav-logout {
    color: var(--color-error);
}

.nav-logout:hover {
    background: rgba(220, 53, 69, 0.1);
    color: var(--color-error);
    border-left-color: var(--color-error);
}

/* ============================================
   CONTENIDO PRINCIPAL
   ============================================ */
.content {
    flex: 1;
    margin-left: var(--sidebar-ancho);
    padding: 25px;
    min-height: calc(100vh - var(--navbar-altura) - 60px);
}

/* ============================================
   TARJETAS Y PANELES
   ============================================ */
.card {
    background: var(--color-blanco);
    border-radius: 8px;
    box-shadow: var(--sombra-suave);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    background: var(--color-secundario);
    padding: 15px 20px;
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-primario);
    margin: 0;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    background: var(--color-secundario);
    border-top: 1px solid var(--color-borde);
}

/* ============================================
   PÁGINA DE TÍTULO
   ============================================ */
.page-header {
    margin-bottom: 25px;
}

.page-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-primario);
    margin-bottom: 5px;
}

.page-subtitle {
    color: var(--color-texto-claro);
    font-size: 14px;
}

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

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--color-borde);
}

.table th {
    background: var(--color-primario);
    color: var(--color-blanco);
    font-weight: 600;
    white-space: nowrap;
}

.table tbody tr:hover {
    background: var(--color-fondo);
}

.table tbody tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.02);
}

.table .text-right {
    text-align: right;
}

.table .text-center {
    text-align: center;
}

/* ============================================
   BOTONES
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transicion);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primario-oscuro);
    color: var(--color-blanco);
}

.btn-secondary {
    background: var(--color-secundario);
    color: var(--color-texto);
    border: 1px solid var(--color-borde);
}

.btn-secondary:hover {
    background: var(--color-borde);
}

.btn-success {
    background: var(--color-exito);
    color: var(--color-blanco);
}

.btn-success:hover {
    background: #218838;
    color: var(--color-blanco);
}

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

.btn-danger:hover {
    background: #c82333;
    color: var(--color-blanco);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ============================================
   FORMULARIOS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--color-texto);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    border: 1px solid var(--color-borde);
    border-radius: 4px;
    transition: var(--transicion);
    background: var(--color-blanco);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primario);
    box-shadow: 0 0 0 3px rgba(14, 69, 154, 0.15);
}

.form-control::placeholder {
    color: #adb5bd;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23333' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 35px;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 200px;
}

.form-text {
    font-size: 12px;
    color: var(--color-texto-claro);
    margin-top: 4px;
}

.form-error {
    color: var(--color-error);
    font-size: 12px;
    margin-top: 4px;
}

/* ============================================
   ALERTAS Y MENSAJES
   ============================================ */
.alert {
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border-color: var(--color-exito);
    color: #155724;
}

.alert-error {
    background: rgba(220, 53, 69, 0.1);
    border-color: var(--color-error);
    color: #721c24;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    border-color: var(--color-advertencia);
    color: #856404;
}

.alert-info {
    background: rgba(23, 162, 184, 0.1);
    border-color: var(--color-info);
    color: #0c5460;
}

/* ============================================
   BADGES / ETIQUETAS
   ============================================ */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--color-primario);
    color: var(--color-blanco);
}

.badge-success {
    background: var(--color-exito);
    color: var(--color-blanco);
}

.badge-danger {
    background: var(--color-error);
    color: var(--color-blanco);
}

.badge-warning {
    background: var(--color-advertencia);
    color: #333;
}

.badge-info {
    background: var(--color-info);
    color: var(--color-blanco);
}

.badge-secondary {
    background: #6c757d;
    color: var(--color-blanco);
}

/* ============================================
   ESTADÍSTICAS / RESUMEN
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: var(--color-blanco);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--sombra-suave);
    border-left: 4px solid var(--color-primario);
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primario);
    line-height: 1;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 13px;
    color: var(--color-texto-claro);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   PAGINACIÓN
   ============================================ */
.pagination {
    display: flex;
    gap: 5px;
    justify-content: center;
    margin-top: 20px;
}

.pagination a,
.pagination span {
    padding: 8px 14px;
    border: 1px solid var(--color-borde);
    border-radius: 4px;
    color: var(--color-texto);
    font-size: 13px;
}

.pagination a:hover {
    background: var(--color-fondo);
    border-color: var(--color-primario);
}

.pagination .active {
    background: var(--color-primario);
    color: var(--color-blanco);
    border-color: var(--color-primario);
}

/* ============================================
   PÁGINA DE LOGIN
   ============================================ */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-primario) 0%, var(--color-primario-oscuro) 100%);
}

.login-container {
    background: var(--color-blanco);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

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

.login-logo img {
    height: 80px;
    width: auto;
}

.login-title {
    text-align: center;
    color: var(--color-primario);
    font-size: 22px;
    margin-bottom: 30px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form .btn {
    margin-top: 10px;
}

/* ============================================
   DETALLES / FICHA
   ============================================ */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.detail-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-fondo);
}

.detail-label {
    font-size: 12px;
    color: var(--color-texto-claro);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.detail-value {
    font-size: 15px;
    color: var(--color-texto);
    font-weight: 500;
}

/* ============================================
   ACCIONES DE TABLA
   ============================================ */
.table-actions {
    display: flex;
    gap: 5px;
}

.table-actions .btn {
    padding: 5px 10px;
    font-size: 12px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-blanco);
    padding: 15px;
    text-align: center;
    border-top: 1px solid var(--color-borde);
    margin-left: var(--sidebar-ancho);
    font-size: 12px;
    color: var(--color-texto-claro);
}

.footer-version {
    font-size: 11px;
    margin-top: 4px;
}

/* ============================================
   UTILIDADES
   ============================================ */
.text-primary { color: var(--color-primario); }
.text-success { color: var(--color-exito); }
.text-danger { color: var(--color-error); }
.text-warning { color: var(--color-advertencia); }
.text-muted { color: var(--color-texto-claro); }

.bg-primary { background-color: var(--color-primario); }
.bg-success { background-color: var(--color-exito); }
.bg-danger { background-color: var(--color-error); }

.text-right { text-align: right; }
.text-center { text-align: center; }

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }

.hidden { display: none; }

/* ============================================
   BOTÓN MENÚ HAMBURGUESA
   ============================================ */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-blanco);
    cursor: pointer;
    padding: 8px;
    margin-right: 10px;
}

.menu-toggle svg {
    display: block;
}

/* Overlay para cerrar el menú */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--navbar-altura);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.sidebar-overlay.show {
    display: block;
}

/* ============================================
   RESPONSIVE - TABLETS (max-width: 992px)
   ============================================ */
@media (max-width: 992px) {
    :root {
        --sidebar-ancho: 220px;
    }

    .navbar-title {
        font-size: 16px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .detail-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   RESPONSIVE - MÓVILES (max-width: 768px)
   ============================================ */
@media (max-width: 768px) {
    :root {
        --sidebar-ancho: 280px;
        --navbar-altura: 56px;
    }

    /* Navbar móvil */
    .navbar {
        padding: 0 15px;
    }

    .navbar-title {
        display: none;
    }

    .navbar-logo {
        height: 35px;
    }

    .menu-toggle {
        display: block;
    }

    .user-dropdown-toggle {
        padding: 5px 10px;
    }

    .navbar-username {
        display: none;
    }

    /* Sidebar móvil */
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    /* Contenido móvil */
    .content {
        margin-left: 0;
        padding: 15px;
    }

    .footer {
        margin-left: 0;
    }

    /* Page header móvil */
    .page-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 15px;
    }

    .page-header .btn,
    .page-header .btn-group {
        width: 100%;
    }

    .page-header .btn-group {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .page-title {
        font-size: 20px;
    }

    /* Formularios móvil */
    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .form-row .form-group {
        min-width: 100%;
    }

    /* Stats móvil */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .stat-card {
        padding: 15px;
    }

    .stat-value {
        font-size: 24px;
    }

    /* Tablas móvil */
    .table-container {
        margin: 0 -15px;
        padding: 0 15px;
    }

    .table th,
    .table td {
        padding: 10px 12px;
        font-size: 13px;
    }

    .table-actions {
        flex-direction: column;
        gap: 5px;
    }

    .table-actions .btn {
        width: 100%;
        justify-content: center;
    }

    /* Cards móvil */
    .card-body {
        padding: 15px;
    }

    .card-header {
        padding: 12px 15px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    /* Detail grid móvil */
    .detail-grid {
        grid-template-columns: 1fr;
    }

    /* Botones móvil */
    .btn {
        padding: 12px 16px;
    }

    .btn-group {
        display: flex;
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }

    .btn-group .btn {
        width: 100%;
    }

    /* Paginación móvil */
    .pagination {
        flex-wrap: wrap;
    }

    .pagination a,
    .pagination span {
        padding: 10px 14px;
    }

    /* Alertas móvil */
    .alert {
        padding: 12px 15px;
        font-size: 13px;
    }

    /* Login móvil */
    .login-container {
        margin: 15px;
        padding: 25px;
    }

    .login-logo img {
        height: 60px;
    }

    .login-title {
        font-size: 18px;
    }

    /* Modal móvil */
    .modal-content {
        width: 95%;
        max-height: 85vh;
        margin: 10px;
    }

    .modal-body {
        padding: 15px;
    }

    .modal-footer {
        padding: 12px 15px;
        flex-direction: column-reverse;
        gap: 10px;
    }

    .modal-footer .btn {
        width: 100%;
    }

    /* Wizard móvil */
    .wizard-steps {
        padding: 15px 10px;
        gap: 5px;
    }

    .wizard-connector {
        width: 30px;
    }

    .step-number {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }

    .step-label {
        font-size: 11px;
    }

    /* Admin grid móvil */
    .admin-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .admin-card {
        padding: 20px 15px;
    }

    .admin-icon {
        width: 60px;
        height: 60px;
    }

    .admin-icon svg {
        width: 30px;
        height: 30px;
    }
}

/* ============================================
   RESPONSIVE - MÓVILES PEQUEÑOS (max-width: 480px)
   ============================================ */
@media (max-width: 480px) {
    .content {
        padding: 10px;
    }

    .page-title {
        font-size: 18px;
    }

    .card-body {
        padding: 12px;
    }

    .table th,
    .table td {
        padding: 8px 10px;
        font-size: 12px;
    }

    .btn {
        padding: 10px 14px;
        font-size: 13px;
    }

    .btn-sm {
        padding: 6px 10px;
        font-size: 11px;
    }

    .badge {
        padding: 3px 8px;
        font-size: 10px;
    }

    .stat-value {
        font-size: 20px;
    }

    .stat-label {
        font-size: 11px;
    }

    /* Ocultar columnas menos importantes en tablas */
    .table .hide-mobile {
        display: none;
    }
}

/* ============================================
   IMPRESIÓN
   ============================================ */
@media print {
    .navbar,
    .sidebar,
    .footer,
    .btn,
    .table-actions {
        display: none !important;
    }

    .content {
        margin-left: 0;
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}