/* ==========================================================
   K-Core-simple — Admin CSS
   Panel de administración: sidebar + contenido
   ========================================================== */

/* Página de login */
.admin-login-page {
    background: var(--color-dark);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-login-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
}

.admin-login-brand {
    font-family: var(--font-serif);
    font-size: var(--size-3xl);
    font-weight: 300;
    text-align: center;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.admin-login-sub {
    text-align: center;
    font-size: var(--size-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: var(--spacing-md);
    max-width: none;
}

/* Layout principal */
.admin-body {
    background: var(--color-bg);
}

.admin-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    background: var(--color-dark);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    height: 100vh;
}

.admin-sidebar-brand {
    padding: 0 var(--spacing-md) var(--spacing-md);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.admin-sidebar-brand a {
    font-family: var(--font-serif);
    font-size: var(--size-xl);
    font-weight: 400;
    color: rgba(255,255,255,0.9);
}

.admin-sidebar-nav {
    flex: 1;
    padding: var(--spacing-sm) 0;
    display: flex;
    flex-direction: column;
}

.admin-sidebar-nav a {
    display: block;
    padding: 0.65rem var(--spacing-md);
    font-size: var(--size-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    transition: color var(--transition), background var(--transition);
    border-left: 2px solid transparent;
}

.admin-sidebar-nav a:hover {
    color: rgba(255,255,255,0.85);
    background: rgba(255,255,255,0.04);
}

.admin-sidebar-nav a.active {
    color: #fff;
    border-left-color: var(--color-accent);
    background: rgba(255,255,255,0.05);
}

.admin-sidebar-footer {
    padding: var(--spacing-sm) var(--spacing-md) 0;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-sidebar-footer span {
    font-size: var(--size-xs);
    color: rgba(255,255,255,0.4);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 110px;
}

.admin-sidebar-footer a {
    font-size: var(--size-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.35);
    transition: color var(--transition);
}

.admin-sidebar-footer a:hover {
    color: rgba(255,255,255,0.7);
}

/* Área de contenido */
.admin-main {
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.admin-topbar {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.admin-page-title {
    font-family: var(--font-serif);
    font-size: var(--size-2xl);
    font-weight: 300;
    color: var(--color-text);
}

.admin-content {
    padding: var(--spacing-md) var(--spacing-lg);
    flex: 1;
}

/* Alertas */
.admin-alert {
    padding: 0.8rem 1rem;
    margin-bottom: var(--spacing-sm);
    font-size: var(--size-sm);
    border-left: 3px solid transparent;
}

.admin-alert-error {
    background: #fff5f5;
    border-color: #e53e3e;
    color: #c53030;
}

.admin-alert-success {
    background: #f0fdf4;
    border-color: #38a169;
    color: #276749;
}

.admin-alert-info {
    background: #fffbea;
    border-color: var(--color-accent);
    color: #7c6330;
}

/* Estadísticas dashboard */
.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-sm);
}

.admin-stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.admin-stat-label {
    font-size: var(--size-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.admin-stat-value {
    font-family: var(--font-serif);
    font-size: var(--size-3xl);
    font-weight: 300;
    color: var(--color-text);
    line-height: 1;
}

.admin-stat-link {
    font-size: var(--size-xs);
    color: var(--color-accent);
    margin-top: var(--spacing-xs);
}

.admin-stat-link:hover {
    text-decoration: underline;
}

/* Panel genérico */
.admin-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
}

.admin-panel-title {
    font-size: var(--size-lg);
    font-weight: 300;
    color: var(--color-text);
}

/* Toolbar */
.admin-toolbar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-bottom: var(--spacing-sm);
}

/* Tabla */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-size: var(--size-sm);
}

.admin-table th {
    text-align: left;
    font-size: var(--size-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.admin-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    vertical-align: middle;
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    white-space: nowrap;
}

.admin-table-actions a {
    font-size: var(--size-xs);
    color: var(--color-accent);
}

.admin-table-actions a:hover {
    text-decoration: underline;
}

.admin-table-meta {
    margin-top: 0.2rem;
    font-size: var(--size-xs);
    color: var(--color-muted);
}

.admin-link-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: var(--size-xs);
    padding: 0;
}

.admin-link-danger {
    color: #c53030;
}

.admin-link-danger:hover {
    text-decoration: underline;
}

/* Badge estado */
.admin-badge {
    display: inline-block;
    font-size: var(--size-xs);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.15rem 0.5rem;
    border: 1px solid currentColor;
}

.admin-badge-published { color: #276749; }
.admin-badge-draft     { color: var(--color-muted); }
.admin-badge-system    { color: var(--color-accent); margin-left: 0.5rem; }

/* Formularios admin */
.admin-form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.admin-grid-block {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.admin-grid-block-3 {
    grid-template-columns: repeat(3, 1fr);
}

.admin-helper {
    font-size: var(--size-sm);
    color: var(--color-muted);
    margin: 0.25rem 0 var(--spacing-sm);
}

.admin-check-row {
    margin-bottom: var(--spacing-sm);
}

.admin-check-label {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--size-sm);
    color: var(--color-text);
}

.admin-check-label input {
    width: auto;
}

.admin-form-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.admin-select {
    width: 100%;
    border: none;
    border-bottom: 1px solid var(--color-border);
    background: transparent;
    padding: 0.6rem 0;
    font-family: var(--font-sans);
    font-size: var(--size-base);
    font-weight: 300;
    color: var(--color-text);
    outline: none;
    cursor: pointer;
}

.admin-empty {
    color: var(--color-muted);
    font-style: italic;
}

.admin-empty a {
    color: var(--color-accent);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        position: static;
        height: auto;
    }

    .admin-form-grid {
        grid-template-columns: 1fr;
    }

    .admin-grid-block-3 {
        grid-template-columns: 1fr;
    }

    .admin-content {
        padding: var(--spacing-sm);
    }
}