.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  backdrop-filter: blur(8px);
}

.app-header__brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.app-header__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toolbar-btn,
.toolbar-select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: 10px 12px;
}

.toolbar-btn:hover {
  cursor: pointer;
  transform: translateY(-1px);
}

@media (max-width: 760px) {
  .app-header { padding: 0 var(--space-4); }
  .app-header__title { display: none; }
}