x-appbar {
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: -moz-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
}

x-appbar > * {
  vertical-align: center;
  position: relative;
  display: inline-block;
  background: none;
  border: none;
  padding: 2px 5px 0;
}

x-appbar > *:first-child:before {
  display: none;
}

x-appbar > header {
  -webkit-box-flex: 1;
  -moz-box-flex: 1;
  -webkit-flex: 1;
  -ms-flex: 1;
  flex: 1;
}

x-appbar > header:after {
  padding-left: 6px;
  font-size: 50%;
  content: attr(subheading);
}

/* Spacer style */
x-appbar > *:before {
  background-color: rgba(0,0,0,0.25);
  width: 1px;
  top: 0px;
  bottom: 0px;
  content: " ";
  position: absolute;
  left: 0px;
}