chad-music/front/src/App.css

.App {
  display: flex;
  height: 100%;
  flex-direction: column;
  justify-content: space-between;
}

.App-header {
  background-color: #1b5e20;
  height: 56px;
  color: white;
  display: flex;
  flex-direction: row;
  flex: initial;
}

.App-logo {
  height: 24px;
  padding: 16px;
}

.App-title {
  font-size: 20px;
  margin: 0;
  line-height: 56px;
}

.Selector {
  flex: 1;
  overflow: auto;
}

.Playlist {
  flex: 1;
  overflow: auto;
}

.Player {
  flex:initial;
  height: 56px;
  background: #4c8c4a;
}

.section {
  float: left;
  padding: 0 10px 0 0;
  width: 256px;
}
.section:nth-child(2) { width: 128px; }
.section:nth-child(5) { width: 128px; }

.Filter {
  width: 100%;
  padding: 9px;
  border: 1px solid gray;
  border-radius: 4px;
}

.Playlist-active {
  background: darkseagreen;
}