/* App Bar */
.app-bar {
  height: var(--app-bar-height);
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: stretch;
}

.app-bar > * {
  display: inline-block;
}

.app-bar .lead {
  flex-basis: 60px;
}

.app-bar .trail {
  flex-basis: 60px;
}

.app-bar button,
.app-bar button img {
  height: var(--app-bar-height);
}