div {
#  background: yellowgreen;
#  padding: 10px; 
}
.div-audio1 {
  width: 220px;
  height: 20px;
  margin-top: 0px;
}
.div-audio2 {
  width: 260px;
  height: 20px;
  margin-top: -15px;
}
.div-audiomob {
  width: 500px;
  height: 40px;
  margin-top: -15px;
}
.div-audio3 {
  width: 260px;
  height: 20px;
  margin-top: -15px;

  background: yellowgreen;
  padding: 0px; 
}

audio {
  width: 100%;
  height: 100%;
  display: block;
}