/* =============================================================================
   SICIF - Sistema Integral de Ciclo de Investigación Forense
   Estilo Institucional - Gobierno de El Salvador / PNC / DECO
   Version 2.0 - Mejorado para responsividad y UX
   ============================================================================= */

:root {
    /* Colores Institucionales El Salvador */
    --sv-azul-oscuro: #0d3b66;
    --sv-azul-medio: #1a5490;
    --sv-azul-claro: #2e86de;
    --sv-dorado: #d4a017;
    --sv-dorado-claro: #f4d03f;
    --sv-blanco: #ffffff;
    --sv-gris-claro: #f8f9fa;
    --sv-gris-medio: #e9ecef;
    --sv-texto: #2c3e50;
    --sv-texto-secundario: #6c757d;

    /* Estados */
    --estado-recibido: #3498db;
    --estado-asignado: #9b59b6;
    --estado-investigacion: #f39c12;
    --estado-cerrado: #27ae60;
    --prioridad-baja: #95a5a6;
    --prioridad-normal: #3498db;
    --prioridad-alta: #e67e22;
    --prioridad-urgente: #e74c3c;

    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;

    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Sidebar */
    --sidebar-width: 260px;
    --navbar-height: 60px;
}

/* =============================================================================
   RESET Y BASE
   ============================================================================= */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background-color: #f0f2f5;
    color: var(--sv-texto);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus visible para accesibilidad */
:focus-visible {
    outline: 2px solid var(--sv-azul-medio);
    outline-offset: 2px;
}

/* =============================================================================
   HEADER / NAVBAR
   ============================================================================= */

.navbar-institucional {
    background: linear-gradient(135deg, var(--sv-azul-oscuro) 0%, var(--sv-azul-medio) 100%);
    box-shadow: var(--shadow-md);
    padding: 0;
    min-height: var(--navbar-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
}

.navbar-institucional .navbar-brand {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--sv-blanco) !important;
    font-weight: 700;
    font-size: 1.1rem;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.navbar-institucional .navbar-brand:hover {
    opacity: 0.9;
}

.navbar-institucional .navbar-brand img {
    height: 40px;
    margin-right: 12px;
}

.navbar-institucional .navbar-brand .brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.navbar-institucional .navbar-brand .brand-text small {
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--sv-dorado);
    letter-spacing: 0.5px;
}

.navbar-institucional .navbar-toggler {
    border: none;
    padding: var(--spacing-sm);
    color: var(--sv-blanco);
}

.navbar-institucional .navbar-toggler:focus {
    box-shadow: none;
}

.navbar-institucional .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    padding: 1rem 1rem !important;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.navbar-institucional .nav-link:hover,
.navbar-institucional .nav-link.active {
    color: var(--sv-blanco) !important;
    background-color: rgba(255, 255, 255, 0.1);
    border-bottom-color: var(--sv-dorado);
}

.navbar-institucional .nav-link i {
    margin-right: 6px;
}

.navbar-institucional .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) 0;
    margin-top: 0;
    animation: dropdownFade 0.2s ease;
}

@keyframes dropdownFade {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.navbar-institucional .dropdown-item {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    transition: background var(--transition-fast);
}

.navbar-institucional .dropdown-item:hover {
    background: var(--sv-gris-claro);
}

.navbar-institucional .dropdown-item i {
    width: 20px;
    color: var(--sv-texto-secundario);
}

.navbar-institucional .dropdown-header {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sv-texto-secundario);
    padding: var(--spacing-sm) var(--spacing-md);
}

/* User info */
.user-info {
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    color: var(--sv-blanco);
}

.user-info .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--sv-dorado);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--sv-azul-oscuro);
    flex-shrink: 0;
}

.user-info .user-details {
    line-height: 1.2;
}

.user-info .user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.user-info .user-role {
    font-size: 0.7rem;
    color: var(--sv-dorado);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-logout {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--sv-blanco);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-left: var(--spacing-md);
    transition: all var(--transition-fast);
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--sv-blanco);
    color: var(--sv-blanco);
}

/* =============================================================================
   SIDEBAR
   ============================================================================= */

.sidebar {
    position: fixed;
    left: 0;
    top: var(--navbar-height);
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--sv-blanco);
    box-shadow: var(--shadow-sm);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1020;
    transition: transform var(--transition-normal);
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--sv-gris-medio);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--sv-texto-secundario);
}

.sidebar-header {
    padding: var(--spacing-lg);
    background: var(--sv-gris-claro);
    border-bottom: 1px solid var(--sv-gris-medio);
    position: sticky;
    top: 0;
    z-index: 1;
}

.sidebar-header h6 {
    margin: 0;
    color: var(--sv-azul-oscuro);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-menu {
    padding: var(--spacing-md) 0;
}

.sidebar-menu .menu-section {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-sm);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--sv-texto-secundario);
}

.sidebar-menu .nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--sv-texto);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    min-height: 44px; /* Touch target */
}

.sidebar-menu .nav-link:hover {
    background: var(--sv-gris-claro);
    color: var(--sv-azul-medio);
    border-left-color: var(--sv-dorado);
}

.sidebar-menu .nav-link.active {
    background: linear-gradient(90deg, rgba(26, 84, 144, 0.1) 0%, transparent 100%);
    color: var(--sv-azul-medio);
    border-left-color: var(--sv-azul-medio);
    font-weight: 600;
}

.sidebar-menu .nav-link i {
    width: 24px;
    margin-right: 10px;
    font-size: 1rem;
    flex-shrink: 0;
}

.sidebar-menu .badge {
    margin-left: auto;
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
}

/* Collapse submenu styles */
.sidebar-menu .nav-link[data-bs-toggle="collapse"] {
    position: relative;
}

.sidebar-menu .nav-link[data-bs-toggle="collapse"] .bi-chevron-down {
    transition: transform var(--transition-fast);
}

.sidebar-menu .nav-link[data-bs-toggle="collapse"]:not(.collapsed) .bi-chevron-down {
    transform: rotate(180deg);
}

.sidebar-menu .collapse .nav-link {
    font-size: 0.8rem;
    padding-top: var(--spacing-xs);
    padding-bottom: var(--spacing-xs);
    min-height: 38px;
}

.sidebar-menu .collapse .nav-link i {
    font-size: 0.85rem;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1019;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

/* =============================================================================
   CONTENIDO PRINCIPAL
   ============================================================================= */

.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--navbar-height);
    padding: var(--spacing-xl);
    min-height: calc(100vh - var(--navbar-height));
    transition: margin var(--transition-normal);
}

.main-content.no-sidebar {
    margin-left: 0;
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--sv-gris-medio);
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--sv-azul-oscuro);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.page-header h1 i {
    font-size: 1.25rem;
}

.page-header p {
    color: var(--sv-texto-secundario);
    font-size: 0.9rem;
}

.page-header .breadcrumb {
    margin-bottom: 0;
    font-size: 0.85rem;
}

.page-header .breadcrumb-item a {
    color: var(--sv-azul-medio);
    text-decoration: none;
}

/* =============================================================================
   CARDS
   ============================================================================= */

.card {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--sv-blanco);
    transition: box-shadow var(--transition-normal);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: var(--sv-blanco);
    border-bottom: 2px solid var(--sv-dorado);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    color: var(--sv-azul-oscuro);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.card-header i {
    margin-right: 8px;
    color: var(--sv-dorado);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    background: var(--sv-gris-claro);
    border-top: 1px solid var(--sv-gris-medio);
    padding: var(--spacing-md) var(--spacing-lg);
}

.card-institucional {
    border-top: 4px solid var(--sv-azul-medio);
}

/* Card Estadistica */
.card-estadistica {
    text-align: center;
    padding: var(--spacing-lg);
    cursor: default;
}

.card-estadistica .stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 1.5rem;
    transition: transform var(--transition-normal);
}

.card-estadistica:hover .stat-icon {
    transform: scale(1.1);
}

.card-estadistica .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--sv-azul-oscuro);
    line-height: 1;
}

.card-estadistica .stat-label {
    font-size: 0.8rem;
    color: var(--sv-texto-secundario);
    margin-top: var(--spacing-sm);
}

/* =============================================================================
   FORMULARIOS
   ============================================================================= */

.form-label {
    font-weight: 600;
    color: var(--sv-texto);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.form-label .text-danger {
    font-size: 0.75rem;
}

.form-control,
.form-select {
    border: 1px solid #ced4da;
    border-radius: var(--radius-md);
    padding: 0.625rem 0.875rem;
    font-size: 0.9rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    min-height: 44px; /* Touch target */
}

.form-control:focus,
.form-select:focus {
    border-color: var(--sv-azul-medio);
    box-shadow: 0 0 0 3px rgba(26, 84, 144, 0.15);
}

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

.form-text {
    font-size: 0.75rem;
    color: var(--sv-texto-secundario);
    margin-top: var(--spacing-xs);
}

.input-group-text {
    background: var(--sv-gris-claro);
    border-color: #ced4da;
    color: var(--sv-texto-secundario);
}

/* Form sections */
.form-section {
    background: var(--sv-gris-claro);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--sv-azul-oscuro);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--sv-dorado);
    display: flex;
    align-items: center;
}

.form-section-title i {
    margin-right: 8px;
    color: var(--sv-dorado);
}

/* Floating labels */
.form-floating > .form-control,
.form-floating > .form-select {
    height: calc(3.5rem + 2px);
    padding: 1rem 0.875rem;
}

/* =============================================================================
   BOTONES
   ============================================================================= */

.btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    min-height: 44px; /* Touch target */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--sv-azul-medio);
    border-color: var(--sv-azul-medio);
}

.btn-primary:hover {
    background: var(--sv-azul-oscuro);
    border-color: var(--sv-azul-oscuro);
}

.btn-secondary {
    background: var(--sv-texto-secundario);
    border-color: var(--sv-texto-secundario);
}

.btn-success {
    background: #27ae60;
    border-color: #27ae60;
}

.btn-success:hover {
    background: #219a52;
    border-color: #219a52;
}

.btn-danger {
    background: #e74c3c;
    border-color: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
    border-color: #c0392b;
}

.btn-warning {
    background: var(--sv-dorado);
    border-color: var(--sv-dorado);
    color: var(--sv-azul-oscuro);
}

.btn-warning:hover {
    background: #c49516;
    border-color: #c49516;
    color: var(--sv-azul-oscuro);
}

.btn-outline-primary {
    color: var(--sv-azul-medio);
    border-color: var(--sv-azul-medio);
}

.btn-outline-primary:hover {
    background: var(--sv-azul-medio);
    color: var(--sv-blanco);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
    min-height: 36px;
}

.btn-group-sm .btn {
    min-height: 36px;
}

/* =============================================================================
   TABLAS
   ============================================================================= */

.table-responsive {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--sv-gris-claro);
    border-bottom: 2px solid var(--sv-dorado);
    color: var(--sv-azul-oscuro);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-md);
    white-space: nowrap;
}

.table tbody td {
    padding: var(--spacing-md);
    vertical-align: middle;
    border-bottom: 1px solid var(--sv-gris-medio);
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: rgba(26, 84, 144, 0.03);
}

.table-caso-id {
    font-family: 'Consolas', 'Monaco', monospace;
    font-weight: 600;
    color: var(--sv-azul-medio);
    font-size: 0.85rem;
}

/* Responsive table cards for mobile */
@media (max-width: 768px) {
    .table-responsive-cards thead {
        display: none;
    }

    .table-responsive-cards tbody tr {
        display: block;
        margin-bottom: var(--spacing-md);
        background: var(--sv-blanco);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        padding: var(--spacing-md);
    }

    .table-responsive-cards tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--sv-gris-claro);
    }

    .table-responsive-cards tbody td:last-child {
        border-bottom: none;
    }

    .table-responsive-cards tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        font-size: 0.75rem;
        color: var(--sv-texto-secundario);
        text-transform: uppercase;
    }
}

/* =============================================================================
   BADGES / ESTADOS
   ============================================================================= */

.badge {
    padding: 0.35rem 0.65rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-estado-recibido {
    background: var(--estado-recibido);
    color: white;
}

.badge-estado-asignado {
    background: var(--estado-asignado);
    color: white;
}

.badge-estado-eninvestigacion,
.badge-estado-investigacion {
    background: var(--estado-investigacion);
    color: white;
}

.badge-estado-cerrado {
    background: var(--estado-cerrado);
    color: white;
}

.badge-prioridad-baja {
    background: var(--prioridad-baja);
    color: white;
}

.badge-prioridad-normal {
    background: var(--prioridad-normal);
    color: white;
}

.badge-prioridad-alta {
    background: var(--prioridad-alta);
    color: white;
}

.badge-prioridad-urgente {
    background: var(--prioridad-urgente);
    color: white;
}

.badge-origen {
    background: var(--sv-gris-medio);
    color: var(--sv-texto);
}

/* =============================================================================
   ALERTAS
   ============================================================================= */

.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert i {
    font-size: 1.25rem;
    margin-right: 12px;
    flex-shrink: 0;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-left: 4px solid #ffc107;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid #17a2b8;
}

/* =============================================================================
   MODALES
   ============================================================================= */

.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 2px solid var(--sv-dorado);
    padding: var(--spacing-lg);
}

.modal-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    border-top: 1px solid var(--sv-gris-medio);
    padding: var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-sm);
}

/* Modal animations */
.modal.fade .modal-dialog {
    transform: scale(0.95) translateY(-20px);
    transition: transform var(--transition-normal);
}

.modal.show .modal-dialog {
    transform: scale(1) translateY(0);
}

/* =============================================================================
   ACTIVIDADES Y TIMELINE
   ============================================================================= */

.actividad-card {
    border-left: 4px solid var(--sv-gris-medio);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-fast);
}

.actividad-card:hover {
    border-left-color: var(--sv-azul-medio);
    box-shadow: var(--shadow-md);
}

.actividad-card.pendiente {
    border-left-color: var(--estado-recibido);
}

.actividad-card.en_progreso {
    border-left-color: var(--estado-investigacion);
}

.actividad-card.completada {
    border-left-color: var(--estado-cerrado);
}

.actividad-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.actividad-tipo {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sv-texto-secundario);
}

.actividad-titulo {
    font-weight: 600;
    color: var(--sv-azul-oscuro);
    margin-bottom: var(--spacing-xs);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--sv-gris-medio);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--sv-azul-medio);
    border: 2px solid var(--sv-blanco);
    box-shadow: 0 0 0 2px var(--sv-azul-medio);
}

.timeline-item.completado::before {
    background: var(--estado-cerrado);
    box-shadow: 0 0 0 2px var(--estado-cerrado);
}

/* =============================================================================
   DOCUMENTOS
   ============================================================================= */

.documento-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--sv-gris-claro);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.documento-item:hover {
    background: var(--sv-gris-medio);
    transform: translateX(4px);
}

.documento-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-md);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.documento-icon.pdf {
    background: #fee2e2;
    color: #dc2626;
}

.documento-icon.image {
    background: #dbeafe;
    color: #2563eb;
}

.documento-icon.doc {
    background: #d1fae5;
    color: #059669;
}

.documento-info {
    flex: 1;
    min-width: 0;
}

.documento-nombre {
    font-weight: 600;
    color: var(--sv-texto);
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.documento-meta {
    font-size: 0.75rem;
    color: var(--sv-texto-secundario);
}

/* =============================================================================
   LOGIN
   ============================================================================= */

.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--sv-azul-oscuro) 0%, var(--sv-azul-medio) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--sv-blanco);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: fadeInUp 0.5s ease;
}

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

.login-header {
    background: var(--sv-azul-oscuro);
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--sv-blanco);
}

.login-header img {
    height: 80px;
    margin-bottom: var(--spacing-md);
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    font-size: 0.85rem;
    color: var(--sv-dorado);
    margin: 0;
}

.login-body {
    padding: var(--spacing-xl);
}

.login-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--sv-gris-claro);
    text-align: center;
    font-size: 0.75rem;
    color: var(--sv-texto-secundario);
}

/* =============================================================================
   LIST GROUP
   ============================================================================= */

.list-group-item {
    border: none;
    border-bottom: 1px solid var(--sv-gris-medio);
    padding: var(--spacing-md) var(--spacing-lg);
    transition: background var(--transition-fast);
}

.list-group-item:last-child {
    border-bottom: none;
}

.list-group-item:hover {
    background: var(--sv-gris-claro);
}

.list-group-flush > .list-group-item:first-child {
    border-top: none;
}

/* =============================================================================
   LOADING STATES
   ============================================================================= */

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--sv-gris-medio);
    border-top-color: var(--sv-azul-medio);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.skeleton {
    background: linear-gradient(90deg, var(--sv-gris-claro) 25%, var(--sv-gris-medio) 50%, var(--sv-gris-claro) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--spacing-sm);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

/* =============================================================================
   PROGRESS BARS
   ============================================================================= */

.progress {
    height: 8px;
    border-radius: 4px;
    background: var(--sv-gris-medio);
    overflow: hidden;
}

.progress-bar {
    transition: width var(--transition-slow);
}

/* =============================================================================
   EMPTY STATES
   ============================================================================= */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl) * 2;
    color: var(--sv-texto-secundario);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state h5 {
    color: var(--sv-texto);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    font-size: 0.9rem;
    max-width: 300px;
    margin: 0 auto;
}

/* =============================================================================
   RESPONSIVE - TABLET
   ============================================================================= */

@media (max-width: 992px) {
    :root {
        --sidebar-width: 240px;
    }

    .sidebar {
        transform: translateX(-100%);
    }

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

    .main-content {
        margin-left: 0;
        padding: var(--spacing-lg);
    }

    .navbar-institucional .nav-link {
        padding: 0.75rem 0.75rem !important;
        font-size: 0.8rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: var(--spacing-md);
    }

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

/* =============================================================================
   RESPONSIVE - MOBILE
   ============================================================================= */

@media (max-width: 768px) {
    :root {
        --spacing-xl: 1.5rem;
    }

    .navbar-institucional .navbar-brand .brand-text small {
        display: none;
    }

    .user-info .user-details {
        display: none !important;
    }

    .page-header h1 {
        font-size: 1.25rem;
    }

    .page-header p {
        font-size: 0.8rem;
    }

    .card-estadistica .stat-value {
        font-size: 1.75rem;
    }

    .card-estadistica .stat-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .card-header {
        padding: var(--spacing-md);
        font-size: 0.9rem;
    }

    .card-body {
        padding: var(--spacing-md);
    }

    .table thead th {
        padding: var(--spacing-sm);
        font-size: 0.65rem;
    }

    .table tbody td {
        padding: var(--spacing-sm);
        font-size: 0.8rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }

    .btn-group .btn {
        padding: 0.4rem 0.6rem;
    }

    .modal-dialog {
        margin: var(--spacing-sm);
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }

    /* Stack buttons on mobile */
    .page-header .btn-group {
        display: flex;
        flex-direction: column;
    }

    .page-header .btn-group .btn {
        border-radius: var(--radius-md) !important;
        margin-bottom: var(--spacing-xs);
    }

    /* Row adjustments */
    .row > [class*="col-md-"],
    .row > [class*="col-lg-"] {
        margin-bottom: var(--spacing-md);
    }
}

/* =============================================================================
   RESPONSIVE - SMALL MOBILE
   ============================================================================= */

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .navbar-institucional .navbar-brand span {
        font-size: 1rem;
    }

    .card-estadistica {
        padding: var(--spacing-md);
    }

    .card-estadistica .stat-value {
        font-size: 1.5rem;
    }

    .form-section {
        padding: var(--spacing-md);
    }

    .btn-logout span {
        display: none;
    }
}

/* =============================================================================
   UTILIDADES
   ============================================================================= */

.text-institucional {
    color: var(--sv-azul-medio);
}

.bg-institucional {
    background: var(--sv-azul-medio);
    color: var(--sv-blanco);
}

.border-dorado {
    border-color: var(--sv-dorado) !important;
}

.hover-shadow {
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.hover-shadow:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.sticky-top {
    position: sticky;
    z-index: 100;
}

.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cursor-pointer {
    cursor: pointer;
}

/* Gap utilities */
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Scroll to top indicator */
.scroll-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: var(--sv-azul-medio);
    color: var(--sv-blanco);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.scroll-indicator.show {
    opacity: 1;
    visibility: visible;
}

.scroll-indicator:hover {
    background: var(--sv-azul-oscuro);
    transform: translateY(-3px);
}

/* =============================================================================
   PRINT STYLES
   ============================================================================= */

@media print {
    .sidebar,
    .navbar-institucional,
    .btn,
    .no-print,
    .scroll-indicator {
        display: none !important;
    }

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

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

    body {
        background: white;
        color: black;
    }

    a {
        text-decoration: none;
        color: black;
    }
}