/* ============================================================
   Concentradores · BSG Energía
   Tema corporativo con modo claro y oscuro
   ============================================================ */

:root {
    --sidebar-width: 260px;
    --topbar-height: 64px;
    --color-primary: #1F3864;
    --color-primary-light: #2E75B6;
    --color-accent: #00C49A;
    --color-bg: #F7F9FC;
    --color-surface: #FFFFFF;
    --color-text: #1A1A2E;
    --color-text-muted: #6B7280;
    --color-border: #E5E7EB;
    --color-danger: #DC3545;
    --color-warning: #F59E0B;
    --color-success: #10B981;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.06);
    --radius: 10px;
}

[data-bs-theme="dark"] {
    --color-bg: #0F172A;
    --color-surface: #1E293B;
    --color-text: #F1F5F9;
    --color-text-muted: #94A3B8;
    --color-border: #334155;
    --color-primary: #4F8DD6;
    --color-primary-light: #6BA5E5;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    transition: background 0.2s, color 0.2s;
}

/* ============ SIDEBAR ============ */
.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.25s;
}

.sidebar-brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 24px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-brand i { font-size: 1.5rem; color: var(--color-accent); }

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--color-text-muted);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 500;
    transition: all 0.15s;
}

.sidebar-nav .nav-item:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.sidebar-nav .nav-item.active {
    background: var(--color-primary);
    color: white;
}

.sidebar-nav .nav-item i { font-size: 1.1rem; width: 20px; text-align: center; }

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--color-border);
}

/* ============ TOPBAR ============ */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    z-index: 90;
}

.topbar-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    flex: 1;
}

.topbar-right { display: flex; align-items: center; gap: 12px; }

/* ============ MAIN ============ */
.main-content {
    margin-left: var(--sidebar-width);
    padding: calc(var(--topbar-height) + 24px) 24px 24px;
    min-height: 100vh;
}

/* ============ KPI CARDS ============ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.kpi-card .label {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.kpi-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.kpi-card .delta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ============ CARDS ============ */
.card-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 16px;
}

.card-panel h3 {
    margin: 0 0 16px;
    font-size: 1.05rem;
    font-weight: 600;
}

/* ============ TABLAS ============ */
.dataTables_wrapper {
    color: var(--color-text);
}

table.dataTable {
    background: var(--color-surface);
    color: var(--color-text);
    border-collapse: separate !important;
    border-spacing: 0;
    width: 100% !important;
}

table.dataTable th {
    background: var(--color-bg);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border) !important;
    font-weight: 600;
    text-align: left;
    padding: 12px;
}

table.dataTable td {
    border-bottom: 1px solid var(--color-border) !important;
    padding: 10px 12px;
}

/* ============ ESTADO ============ */
.estado-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}
.estado-pill.ok    { background: rgba(16,185,129,.12); color: var(--color-success); }
.estado-pill.error { background: rgba(220,53,69,.12);  color: var(--color-danger);  }
.estado-pill.sin_datos { background: rgba(245,158,11,.12); color: var(--color-warning); }
.estado-pill.nunca { background: rgba(107,114,128,.12); color: var(--color-text-muted); }

/* ============ SKELETON LOADER ============ */
.skeleton-loader { padding: 16px; }
.skeleton-bar {
    height: 28px;
    background: linear-gradient(90deg, var(--color-border) 25%, var(--color-bg) 50%, var(--color-border) 75%);
    background-size: 200% 100%;
    animation: skeleton 1.5s infinite;
    border-radius: 8px;
    margin-bottom: 12px;
}
.skeleton-bar:nth-child(2) { width: 80%; }
.skeleton-bar:nth-child(3) { width: 60%; }
@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============ MOBILE ============ */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .topbar { left: 0; }
    .main-content { margin-left: 0; }
}