.pq-sound-system {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px;
  font-family: Arial, sans-serif;
}

.pq-sound-header {
  text-align: center;
  margin-bottom: 24px;
}

.pq-sound-header h2 {
  margin: 0 0 8px;
  font-size: 32px;
  color: #0f172a;
}

.pq-sound-status {
  margin: 0;
  color: #475569;
  font-weight: 600;
}

.pq-sound-grid,
.pq-word-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 20px;
}

.pq-sound-grid {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.pq-word-grid {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.pq-sound-tile,
.pq-word-tile,
.pq-control-btn {
  border: none;
  border-radius: 18px;
  padding: 18px;
  font-size: 22px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.pq-sound-tile {
  background: #facc15;
  color: #0f172a;
  min-height: 90px;
}

.pq-word-tile {
  background: #ffffff;
  color: #0f172a;
  border: 1px solid #e5e7eb;
  min-height: 72px;
}

.pq-control-btn {
  background: #0f172a;
  color: #ffffff;
  padding: 14px 24px;
  font-size: 16px;
}

.pq-sound-tile:hover,
.pq-word-tile:hover,
.pq-control-btn:hover {
  transform: translateY(-1px);
}

.pq-sound-tile.is-playing,
.pq-word-tile.is-playing {
  background: #22c55e;
  color: #ffffff;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.18);
}

.pq-sound-controls {
  text-align: center;
}

.pq-note {
  margin-top: 18px;
  color: #475569;
  font-size: 14px;
  text-align: center;
}

@media (max-width: 640px) {
  .pq-sound-header h2 {
    font-size: 26px;
  }

  .pq-sound-tile,
  .pq-word-tile {
    font-size: 18px;
  }
}