/* =======================================================
   css/layout.css
   Estructura principal: sidebar, topbar, main content,
   contenedores de página.
   ======================================================= */

/* ── Sidebar ───────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
  transition: width var(--transition);
  overflow: hidden;
}

.sidebar.collapsed {
  width: 64px;
}

/* Header del sidebar */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  height: var(--topbar-height);
  flex-shrink: 0;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-blue);
  white-space: nowrap;
  overflow: hidden;
  letter-spacing: -0.3px;
}

.sidebar.collapsed .logo {
  display: none;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.sidebar-toggle:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* Menú de navegación */
.nav-menu {
  padding: 12px 8px;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-menu li {
  margin-bottom: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  position: relative;
}

.nav-link:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.nav-link.active {
  background: rgba(88, 166, 255, 0.12);
  color: var(--accent-blue);
}

.nav-link.active .nav-icon {
  filter: drop-shadow(0 0 4px rgba(88, 166, 255, 0.5));
}

.nav-icon {
  font-size: 18px;
  min-width: 20px;
  text-align: center;
}

.nav-text {
  font-size: 13px;
  font-weight: 500;
}

.sidebar.collapsed .nav-text {
  display: none;
}

.nav-badge {
  background: var(--accent-red);
  color: #fff;
  border-radius: 10px;
  padding: 1px 6px;
  font-size: 10px;
  font-weight: 700;
  margin-left: auto;
}

.nav-badge:empty {
  display: none;
}

/* Footer del sidebar */
.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}

.sidebar.collapsed .sidebar-footer {
  display: none;
}

/* ── Main Content ──────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition);
  min-width: 0; /* evita overflow en flex */
}

.main-content.shifted {
  margin-left: 64px;
}

/* ── Topbar ────────────────────────────────────────── */
.topbar {
  height: var(--topbar-height);
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
  flex-shrink: 0;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.usuario-nombre {
  font-size:   13px;
  color:       var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.fecha-hoy {
  color: var(--text-secondary);
  font-size: 12px;
  white-space: nowrap;
}

/* ── Páginas ───────────────────────────────────────── */
.page {
  display: none;
  padding: 24px;
  flex: 1;
  animation: pageFadeIn 0.25s ease;
}

.page.active {
  display: block;
}

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

/* ── Section card (contenedor de tabla/lista) ──────── */
.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.section-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.section-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ── Grid de tarjetas de métricas ──────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

/* ── Fila de gráficas ──────────────────────────────── */
.charts-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}