/* ===== VARIABLES MEJORADAS ===== */
:root {
    /* Colores principales manteniendo tu paleta */
    --admin-primary: #003864;
    --admin-secondary: #148ba6;
    --admin-accent: #00274d;

    /* Colores de estado con mejor contraste */
    --admin-success: #1e7e34;
    --admin-warning: #e67e22;
    --admin-warning-second: #e67e00;
    --admin-danger: #c0392b;

    /* Escala de grises mejorada */
    --admin-light: #f8f9fa;
    --admin-dark: #00274d;
    --admin-gray-light: #e9ecef;
    --admin-gray-medium: #6c757d;
    --admin-gray-dark: #495057;
    --admin-white: #ffffff;

    /* Gradiente y efectos */
    --admin-gradient: linear-gradient(135deg, var(--admin-primary), var(--admin-secondary));
    --admin-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.15), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    --admin-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.08);

    /* Constantes de diseño */
    --admin-border-radius: 12px;
    --admin-border-radius-sm: 8px;
    --admin-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --admin-sidebar-width: 280px;
    --admin-header-height: 80px;
}

/* ===== LAYOUT ADMIN MEJORADO ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

/* ===== SIDEBAR MEJORADO ===== */
.admin-sidebar {
    width: var(--admin-sidebar-width);
    background: var(--admin-white);
    box-shadow: var(--admin-shadow);
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    z-index: 1000;
    transition: var(--admin-transition);
}

.sidebar-header {
    background: var(--admin-gradient);
    padding: 1.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h4 {
    color: white;
    margin: 0;
    font-weight: 600;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--admin-gray-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-item {
    margin: 0.25rem 0.75rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--admin-gray-dark);
    text-decoration: none;
    border-radius: var(--admin-border-radius-sm);
    transition: var(--admin-transition);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--admin-light);
    color: var(--admin-primary);
    transform: translateX(5px);
}

.nav-link.active {
    background: var(--admin-primary);
    color: white;
}

.nav-link i {
    margin-right: 0.75rem;
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* ===== CONTENIDO PRINCIPAL ===== */
.admin-main {
    flex: 1;
    margin-left: var(--admin-sidebar-width);
    transition: var(--admin-transition);
}

.admin-header {
    background: var(--admin-white);
    padding: 1rem 2rem;
    box-shadow: var(--admin-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.breadcrumb-container {
    background: var(--admin-white);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--admin-gray-light);
}

.admin-content {
    padding: 2rem;
}

/* ===== TARJETAS MEJORADAS ===== */
.card {
    border: none;
    border-radius: var(--admin-border-radius);
    box-shadow: var(--admin-shadow);
    transition: var(--admin-transition);
    background: var(--admin-white);
    margin-bottom: 1.5rem;
}

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

.card-header {
    background: var(--admin-gradient);
    color: white;
    border-radius: var(--admin-border-radius) var(--admin-border-radius) 0 0 !important;
    padding: 1.25rem 1.5rem;
    border-bottom: none;
    display: flex;
    justify-content: between;
    align-items: center;
}

.card-header h3, .card-header h4, .card-header h5 {
    margin: 0;
    font-weight: 600;
    padding-right: 10px;
}

/* ===== GRID DE CATEGORÍAS MEJORADO ===== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--admin-white);
    border-radius: var(--admin-border-radius);
    padding: 1.5rem;
    box-shadow: var(--admin-shadow);
    transition: var(--admin-transition);
    border-left: 4px solid var(--admin-primary);
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--admin-shadow-hover);
}

.category-header {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--admin-dark);
    margin: 0;
}

.category-type {
    background: var(--admin-light);
    color: var(--admin-gray-medium);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.category-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* ===== LISTAS MEJORADAS ===== */
.enhanced-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-item {
    background: var(--admin-white);
    border: 1px solid var(--admin-gray-light);
    border-radius: var(--admin-border-radius-sm);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    transition: var(--admin-transition);
    display: flex;
    justify-content: between;
    align-items: center;
}

.list-item:hover {
    background: var(--admin-light);
    border-color: var(--admin-primary);
    transform: translateX(5px);
}

.list-item-content {
    flex: 1;
}

.list-item-title {
    font-weight: 600;
    color: var(--admin-dark);
    margin: 0 0 0.25rem 0;
}

.list-item-subtitle {
    color: var(--admin-gray-medium);
    font-size: 0.875rem;
    margin: 0;
}

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

/* ===== BOTONES MEJORADOS ===== */
.btn {
    border-radius: var(--admin-border-radius-sm);
    font-weight: 500;
    transition: var(--admin-transition);
    border: none;
    padding: 0.75rem 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

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

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

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

.btn-warning {
    background: var(--admin-warning);
    border-color: var(--admin-warning);
    color: white;
}

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

.btn-outline-secondary {
    border-color: var(--admin-gray-medium);
    color: var(--admin-gray-medium);
}

.btn-outline-secondary:hover {
    background: var(--admin-gray-medium);
    border-color: var(--admin-gray-medium);
    color: white;
}

/* ===== BREADCRUMB MEJORADO ===== */
.breadcrumb {
    background: transparent;
    border-radius: var(--admin-border-radius-sm);
    padding: 0;
    margin: 0;
    box-shadow: none;
}

.breadcrumb-item a {
    color: var(--admin-primary);
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb-item.active {
    color: var(--admin-gray-medium);
}

/* ===== GRUPOS DE DOCUMENTOS ===== */
.document-group {
    background: var(--admin-white);
    border-radius: var(--admin-border-radius);
    padding: 1.5rem;
    box-shadow: var(--admin-shadow);
    margin-bottom: 1.5rem;
}

.group-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--admin-gray-light);
}

.group-title {
    color: var(--admin-primary);
    font-weight: 600;
    margin: 0;
}

.group-actions {
    padding-left: 10px;
    display: flex;
    gap: 0.5rem;
}

/* ===== ESTADÍSTICAS RÁPIDAS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--admin-white);
    padding: 1.5rem;
    border-radius: var(--admin-border-radius);
    box-shadow: var(--admin-shadow);
    text-align: center;
    border-top: 4px solid var(--admin-primary);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--admin-primary);
    margin: 0;
}

.stat-label {
    color: var(--admin-gray-medium);
    font-size: 0.875rem;
    margin: 0.5rem 0 0 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .admin-layout {
        flex-direction: column;
    }

    .admin-sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .admin-main {
        margin-left: 0;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .list-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .list-item-actions {
        align-self: flex-end;
    }
}

/* ===== UTILITIES ===== */
.text-muted {
    color: var(--admin-gray-medium) !important;
}

.bg-transparent {
    background: transparent !important;
}

.shadow-sm {
    box-shadow: var(--admin-shadow) !important;
}

/* ===== ANIMACIONES ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ===== TOGGLE SIDEBAR ===== */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--admin-primary);
    cursor: pointer;
}

@media (max-width: 768px) {
    .sidebar-toggle {
        display: block;
    }

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

    .admin-sidebar.active {
        transform: translateX(0);
    }
}