

<link rel="import" href="../../polymer/polymer.html">

<!--
app-grid is a helper class useful for creating responsive, fluid grid layouts using custom properties.
Because custom properties can be defined inside a `@media` rule, you can customize the grid layout
for different responsive breakpoints.

Example:

Import `app-grid-style.html` and include `app-grid-style` in the style of an element's definition.
Then, add the class `app-grid` to a container such as `ul` or `div`:

```html
<template>
  <style in