/* ── Top navigation bar ────────────────────────────────────────────────────── */

app-topbar {
  display: flex;
  align-items: center;
  height: var(--topbar-height);
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--sidebar-divider);
  padding: 0 1rem;
  flex-shrink: 0;
  user-select: none;
}

.topbar-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--sidebar-brand-color);
  letter-spacing: 0.02em;
}

.topbar-spacer {
  flex: 1;
}

.topbar-theme-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--sidebar-text);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  padding: 0;
}

.topbar-theme-btn:hover {
  color: var(--sidebar-text-active);
  background: var(--sidebar-hover);
}

.topbar-theme-btn i {
  font-size: 0.85rem;
}

.topbar-copilot-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: #6366f1;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  padding: 0;
  margin-right: 0.25rem;
}

.topbar-copilot-btn:hover {
  background: var(--sidebar-hover);
}

.topbar-copilot-btn i {
  font-size: 0.9rem;
}