/* ===================================================================
   Studio panel (left column, main window)
=================================================================== */
#studio-panel {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
  background: transparent;
  margin: 0;
  padding: 0 8px 0 8px;
  box-sizing: border-box;
  height: 100vh;
  align-self: stretch;
  min-height: 0;
}

/* ===================================================================
   Tool windows row (Edit Segment + Placeholders)
=================================================================== */