/* ----------------------------------------------------
   Layout — Containers & Global Page Structure
---------------------------------------------------- */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

/* Control grid (shared by top and bottom panels) */
.controls {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  align-items: start;
  margin: 16px 0;
}

@media (max-width: 900px) {
  .controls {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 550px) {
  .controls {
    grid-template-columns: 1fr;
  }
}

/* Right-align sample/run buttons */
.controls .control:last-child {
  text-align: right;
}

.footer {
  margin-top: 12px;
  color: var(--muted);
}