/* Estilos complementares para o Motor 3·6·9 */
    .engine-controls {
      grid-column: 1 / -1;
      display: grid;
      gap: 12px;
      margin-top: 16px;
      padding: 12px 0;
      border-top: 1px solid rgba(255,255,255,0.1);
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .engine-controls .btn-group {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .engine-controls .engine-btn {
      padding: 8px 14px;
      border-radius: 40px;
      border: 1px solid rgba(255,255,255,0.2);
      background: rgba(255,255,255,0.03);
      color: inherit;
      font-family: 'JetBrains Mono', monospace;
      font-weight: 500;
      font-size: 0.85rem;
      cursor: pointer;
      transition: all 0.2s ease;
      backdrop-filter: blur(2px);
    }
    .engine-controls .engine-btn:hover {
      transform: translateY(-2px);
      background: rgba(255,255,255,0.1);
      border-color: rgba(255,255,255,0.4);
    }
    .engine-controls .engine-btn.is-active {
      border-color: var(--kob-voice-primary, #a97cff);
      background: rgba(169,124,255,0.2);
      box-shadow: 0 0 6px rgba(169,124,255,0.3);
    }
    .engine-controls label {
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-weight: 600;
      opacity: 0.7;
      margin-right: 8px;
    }
    .engine-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      justify-content: space-between;
    }
    @media (max-width: 720px) {
      .engine-row { flex-direction: column; align-items: flex-start; gap: 12px; }
    }

.engine-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}