audrey/src/style.css

#seek-scale slider {  
  margin: 0px;
  opacity: 0%;
  min-width: 10px;
  min-height: 10px;
}

#volume-scale slider {  
  margin: -5px;
  min-width: 15px;
  min-height: 15px;
}

.playing .title-label {
  font-weight: bold;
}