body { background:#0e0b1f; color:white; }

.lyrics-bar { text-align:center; padding:15px; font-size:18px; }

.waterfall-area {
  height:300px;
  background:#140d25;
  position:relative;
  overflow:hidden;
}

.note {
  position:absolute;
  top:0;
  background:linear-gradient(45deg,#ff4d6d,#ff9e00);
  padding:6px 10px;
  border-radius:6px;
  color:white;
}

.piano { display:flex; }

.key {
  flex:1;
  padding:18px;
  margin:2px;
  background:white;
  color:black;
  border-radius:6px;
}