ionic-framework/scss/framework/structure/_bar.scss

// Use Flexbox for our header and footer bars
.bar {
  position: fixed;
  right: 0;
  left: 0;
  z-index: 10;

	display: -webkit-box;
  display: box;
  -webkit-box-orient: horizontal;
  box-orient: horizontal;

  box-sizing: border-box;

  height: $barHeight;

  // Title inside of a bar is centered
  .title {
    /*
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    */

    line-height: $barTitleLineHeightComputed;

    margin: 0;
    //padding: $barPaddingVertical 0px;

    text-align: center;
    white-space: nowrap;
    font-size: $barTitleFontSize;

    -webkit-box-flex: 3;
    -moz-box-flex: 3;
    box-flex: 3;
  }

  .title a {
    color: inherit;
  }

  .button {
    -webkit-box-flex: 0;
    -moz-box-flex: 0;
    box-flex: 0;
  }

  // Place the last button in a bar on the right of the bar
  /*
  .title + .button:last-child,
  .button + .button:last-child,
  .button.pull-right {
    position: absolute;
    top: 5px;
    right: 5px;
  }
  */
}


// Header at top
.bar-header {
  top: 0;
}

// Footer at bottom
.bar-footer {
  bottom: 0;
}


/* Pad top/bottom of content so it doesn't hide behind .bar-title and .bar-tab.
   Note: For these to work, content must come after both bars in the markup */
.bar ~ main {
  top: $barHeight;
}
.bar ~ main {
  bottom: $barHeight;
}