.app-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 32px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.controls-panel {
  position: sticky;
  top: 20px;
}

.preview-panel {
  min-height: 680px;
}