.app-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1rem;
}

.topbar {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.25rem;
  margin-bottom: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.topbar-status {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tabbar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.main-content {
  display: block;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.page-header {
  margin-bottom: 1rem;
}

.page-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.card-stack {
  display: grid;
  gap: 1rem;
}

.card-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.form-grid {
  display: grid;
  gap: 0.9rem;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

@media (max-width: 900px) {
  .topbar {
    flex-direction: column;
  }

  .two-col,
  .three-col {
    grid-template-columns: 1fr;
  }
}