.controls {
  padding: 30px 0 15px;
  text-align: center;
}

.controls .btn {
  margin-bottom: 15px;
}

@media screen and (min-width: 990px) {
  .controls .mark-controls {
      display: inline;
  }
}

#demo.vertical {
  justify-content: space-between;
}

#waveform {
  position: relative;
}

.vertical {
  display: flex;
  margin-bottom: 20px;
}

.vertical #demo {
  margin-right: 30px;
}

#waveform.vertical {
  height: 400px;
}

#progress-bar {
  position: absolute;
  z-index: 10;
  top: 50%;
  margin-top: -10px;
  left: 5%;
  width: 90%;
}

#drop {
  border: 3px dashed #ddd;
  padding: 30px;
}

#drop.wavesurfer-dragover {
  border-color: #333;
}

.tbrl-0 {
top: 0;
bottom: 0;
right: 0;
left: 0;
}

.tbrl-1 {
top: 1px;
bottom: 1px;
right: 1px;
left: 1px;
}
.tbrl-2 {
  top: 2px;
  bottom: 2px;
  right: 2px;
  left: 2px;
}

.bg-cover {
object-fit: cover;
background-size: cover;
background-repeat: no-repeat;
background-position: center center;
}

.bg-contain {
object-fit: contain;
background-size: contain;
background-repeat: no-repeat;
background-position: center center;
}