.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100dvh;
}

.sidebar {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-sticky);
  display: flex;
  flex-direction: column;
  height: 100dvh;
  background: var(--color-brand-900);
  color: var(--color-on-dark);
}

.brand-lockup {
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-md);
  border-block-end: 1px solid var(--color-brand-800);
}

.brand-lockup img {
  width: 10.5rem;
  height: auto;
  filter: brightness(0) invert(1);
  opacity: 0.92;
}

.brand-lockup span {
  color: var(--color-brand-200);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.primary-nav {
  display: grid;
  gap: var(--space-2xs);
  padding: var(--space-md) var(--space-sm);
}

.primary-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: 2.75rem;
  padding-inline: var(--space-sm);
  border-radius: var(--radius-sm);
  color: var(--color-brand-100);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-micro) var(--ease-out), color var(--dur-micro) var(--ease-out);
}

.primary-nav a svg {
  width: 1.2rem;
  height: 1.2rem;
  flex: none;
}

.primary-nav a[aria-current="page"] {
  background: var(--color-brand-800);
  color: var(--color-on-dark);
  box-shadow: inset 2px 0 0 var(--color-gold-500);
}

.primary-nav a:focus-visible {
  outline-color: var(--color-gold-300);
}

.main-column {
  min-width: 0;
}

.topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-height: var(--topbar-height);
  padding-inline: var(--space-lg);
  border-block-end: 1px solid var(--color-line);
  background: var(--color-surface);
}

.topbar-title {
  display: grid;
  min-width: 8rem;
}

.topbar-kicker {
  color: var(--color-muted);
  font-size: var(--text-xs);
}

.topbar-title strong {
  font-size: var(--text-base);
  font-weight: 600;
}

.safety-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  min-width: 0;
  margin-inline: auto;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-gold-300);
  border-radius: var(--radius-pill);
  background: var(--color-gold-50);
  color: var(--color-warning);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.safety-label span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex: none;
}

.user-chip > span {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-brand-100);
  color: var(--color-brand-800);
  font-size: var(--text-xs);
  font-weight: 600;
}

.user-chip div {
  display: grid;
}

.user-chip strong,
.user-chip small {
  line-height: 1.25;
}

.user-chip strong {
  font-size: var(--text-sm);
}

.user-chip small {
  color: var(--color-muted);
}

.view-root {
  width: 100%;
  max-width: var(--content-max);
  min-width: 0;
  margin-inline: auto;
  padding: var(--space-xl);
}

.icon-button {
  display: inline-grid;
  width: var(--control-height);
  height: var(--control-height);
  flex: none;
  place-items: center;
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
}

.icon-button svg {
  width: 1.25rem;
  height: 1.25rem;
}

.menu-button,
.nav-overlay {
  display: none;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sticky) - 1);
  border: 0;
  background: var(--color-overlay);
}