ionic-framework/ionic/components/toolbar/toolbar.scss

// Toolbar
// --------------------------------------------------

$toolbar-background: #f7f7f8 !default;
$toolbar-order: (
  back-button: 10,
  title: 20,
  primary: 30,
  secondary: 40
);


.toolbar-container {
  background: $toolbar-background;
}

ion-toolbar {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;

  // by default ion-toolbar is display:none and
  // the transition animation will add the show class
  display: none;

  &.show-toolbar {
    display: flex;
  }
}

.toolbar-inner {
  display: flex;
  width: 100%;
}

ion-toolbar back-button.toolbar-item {
  order: map-get($toolbar-order, 'back-button');
}

.toolbar-title {
  flex: 1;
  order: map-get($toolbar-order, 'title');

  display: flex;
  align-items: center;
  margin: 0 0 2px;
}

// buttons are primary by default
ion-toolbar .button,
ion-toolbar [side="primary"] {
  order: map-get($toolbar-order, 'primary');
}

ion-toolbar [side="secondary"] {
  order: map-get($toolbar-order, 'secondary');
}

ion-title {
  display: block;

  // used to notify JS when the title has been rendered
  animation-duration: 1ms;
  animation-name: nodeInserted;
}

.toolbar-inner-title {
  width: 100%;
  padding: 0 15px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.toolbar .button {
  background: transparent;
  border: none;
}

.toolbar-title-hide {
  opacity: 0;
}