* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #1a1a2e;
  color: #e0e0e0;
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.player-container {
  background: #16213e;
  border-radius: 16px;
  padding: 2rem;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.player-header h1 {
  text-align: center;
  font-size: 1.8rem;
  color: #e94560;
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.now-playing {
  background: #0f3460;
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin-bottom: 1.2rem;
  min-height: 64px;
  display: flex;
  align-items: center;
}

.track-title {
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-index {
  font-size: 0.75rem;
  color: #7a8ba0;
  margin-top: 4px;
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
  font-size: 0.8rem;
  color: #7a8ba0;
}

.progress-container input[type="range"] {
  flex: 1;
}

.controls {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.controls button {
  background: #0f3460;
  border: none;
  border-radius: 50%;
  color: #e0e0e0;
  cursor: pointer;
  font-size: 1.1rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.1s;
}

.controls button:hover {
  background: #e94560;
  color: #fff;
}

.controls button:active {
  transform: scale(0.93);
}

#btn-play {
  background: #e94560;
  width: 60px;
  height: 60px;
  font-size: 1.4rem;
}

#btn-play:hover {
  background: #c73652;
}

.controls button.toggle.active {
  background: #e94560;
  color: #fff;
}

.volume-container {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.volume-container span {
  font-size: 1.1rem;
}

.volume-container input[type="range"] {
  flex: 1;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: #0f3460;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: #e94560;
  border-radius: 50%;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: #e94560;
  border-radius: 50%;
  border: none;
}

.playlist-container {
  background: #0f3460;
  border-radius: 12px;
  overflow: hidden;
  max-height: 280px;
  display: flex;
  flex-direction: column;
}

.playlist-header {
  padding: 0.6rem 1rem;
  font-size: 0.8rem;
  color: #7a8ba0;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid #16213e;
}

#playlist {
  list-style: none;
  overflow-y: auto;
  flex: 1;
}

#playlist::-webkit-scrollbar {
  width: 4px;
}

#playlist::-webkit-scrollbar-thumb {
  background: #e94560;
  border-radius: 2px;
}

#playlist li {
  padding: 0.6rem 1rem;
  cursor: pointer;
  font-size: 0.88rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-bottom: 1px solid #16213e;
  transition: background 0.15s;
}

#playlist li:hover {
  background: #16213e;
}

#playlist li.active {
  background: #1a1a2e;
  color: #e94560;
  font-weight: 600;
}