/* Sidebar — desktop'ta gizli (topbar nav yeterli), mobilde slide-in */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-light);
  z-index: 50;
  transform: translateX(-100%);
  transition: transform var(--transition);
  padding-top: 16px;
  overflow-y: auto;
}
.sidebar.open { transform: translateX(0); box-shadow: var(--shadow-md); }
.sidebar-nav { display: flex; flex-direction: column; padding: 8px; }
.sidebar-nav a {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  display: flex; align-items: center; gap: 10px;
}
.sidebar-nav a:hover { background: var(--bg-muted); text-decoration: none; color: var(--text-primary); }
.sidebar-nav a.active { color: var(--color-primary); background: var(--color-primary-light); }

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  z-index: 40;
  display: none;
}
.sidebar-overlay.visible { display: block; }

@media (min-width: 901px) {
  .sidebar, .sidebar-overlay { display: none !important; }
}