.mp3-player {
  margin: 10px 0;
  font-family: tahoma, sans-serif;
  font-size: 11px;
}

.track-item {
  background-color: #666666;
  border: 1px solid #555555;
  padding: 8px;
  margin: 5px 0;
  display: flex;
  align-items: center;
  border-radius: 3px;
}

.play-btn {
  background-color: #888888;
  color: #FFFFFF;
  border: 1px solid #999999;
  padding: 5px 12px;
  cursor: pointer;
  font-size: 16px;
  margin-right: 10px;
  border-radius: 3px;
  min-width: 40px;
  text-align: center;
}

.play-btn:hover {
  background-color: #999999;
}

.play-btn:active {
  background-color: #777777;
}

.track-info {
  flex-grow: 1;
  color: #FFFFFF;
}

.track-name {
  font-weight: bold;
  color: #FFFFFF;
}

.track-progress {
  width: 100%;
  height: 4px;
  background-color: #555555;
  margin-top: 5px;
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: #FFFFFF;
  width: 0%;
  transition: width 0.1s linear;
}