index.css

body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background-color: black;
  overflow: hidden;
  -webkit-user-select: none;
  font-family: 'Roboto', sans-serif;
  font-size: 12px;
  cursor: default;
}

#player {
  width: 100%;
  height: 100%;
}

#overlay {
  opacity: 0;
  z-index: 10;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  transition: opacity 0.3s ease;
}

#drag {
  -webkit-app-region: drag;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 50px;
  right: 0;
}

.hide-cursor {
  cursor: none;
}

.hide-cursor #overlay {
  opacity: 0 !important;
}

body:hover #overlay {
  opacity: 1;
}

#controls {
  z-index: 11;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 50px;
  background-color: #1F2021;
  color: #727374;
}

#controls .center {
  margin-top: 13px;
}

#controls-timeline {
  background-color: #303233;
  height: 10px;
  width: 100%;
}

#controls-timeline-position {
  background-color: #31A357;
  width: 0%;
  height: 10px;
  transition: width 0.25s linear;
}

#controls-play {
  float: left;
  padding: 9px 20px;
  padding-right: 15px;
}

#controls-play .octicon {
  color: #31A357;
  font-size: 22px;
}

#controls-time {
  width: 100px;
  float: left;
}

#controls-time-current {
  color: #F0F0F0;
}

#controls-time-current, #controls-time-total {
  display: inline-block;
  min-width: 33px;
}

#controls-name {
  float: left;
  margin-left: 20px;
}