body {
  background-color: #09101d;
  color: #bbb;
}

div {
  border: 1px dashed white;
}

button {
  background-color: #28374a;
  color: #bbb;
}

#flexbox-container {
  display: flex;
  flex-direction: column;
}

#controls-top {
  display: flex;
  flex-direction: row;
}

#top-left-controls {
  display: flex;
  flex-direction: column;
}

#playback-controls {
  display: flex;
  flex-direction: column;
}