.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  z-index: 40;
  top: 0;
  display: grid;
  grid-template-columns: var(--sidebar-wide) auto minmax(220px, 420px) 1fr;
  align-items: center;
  height: var(--topbar-height);
  padding: 0 16px 0 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand > span:last-child {
  display: grid;
  min-width: 0;
  line-height: 1.15;
}

.brand strong {
  overflow: hidden;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand small {
  margin-top: 3px;
  color: var(--color-text-muted);
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-text);
}

.brand-mark img {
  filter: invert(1);
}

.project-control {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--color-text-muted);
  font-size: 12px;
}

.project-control select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  padding: 5px 32px 5px 10px;
}

.topbar-status {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.workbench {
  display: grid;
  grid-template-columns: var(--sidebar-wide) minmax(0, 1fr) var(--inspector-width);
  min-height: calc(100vh - var(--topbar-height));
}

.desktop-nav {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 3px;
  padding: 18px 12px;
  border-right: 1px solid var(--color-border);
  background: var(--gray-25);
}

#mainContent {
  min-width: 0;
  padding: 32px;
  outline: none;
}

#inspector {
  min-width: 0;
  padding: 24px 20px;
  border-left: 1px solid var(--color-border);
  background: var(--color-surface);
}

.inspector-collapsed .workbench {
  grid-template-columns: var(--sidebar-wide) minmax(0, 1fr) 0;
}

.inspector-collapsed .workbench > #inspector {
  display: none;
}

.mobile-nav, .more-menu, .shell-toggle {
  display: none;
}