umns`          | The number of columns an expandible item should expand to. | 1

@group App Elements
@pseudoElement app-grid
@demo app-grid/demo/index.html
-->

<dom-module id="app-grid-style">
  <template>
    <style>

      :host {
        /**
         * The width for the expandible item is:
         * ((100% - subPixelAdjustment) / columns * itemColumns - gutter
         *
         * - subPixelAdjustment: 0.1px (Required for IE 11)
         * - gutter: var(--app-grid-gutter)
         * - columns: var(--a