.background-noise-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.noise-controls {
  margin-bottom: var(--spacing-md);
}

.noise-control-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.noise-control-item label {
  font-size: 14px;
  color: var(--text-primary);
}

.volume-control {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.volume-slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--glass-bg);
  outline: none;
  -webkit-appearance: none;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
}

.volume-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  border: none;
}

.noise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.noise-card {
  text-align: center;
  padding: var(--spacing-lg);
  position: relative;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.noise-card.playing {
  border-color: var(--accent-primary);
  background: var(--glass-bg);
}

.noise-icon {
  font-size: 48px;
}

.noise-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.noise-description {
  font-size: 12px;
  color: var(--text-secondary);
}

.noise-play-btn {
  margin-top: var(--spacing-xs);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.noise-play-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

