diff --git a/frontend/webpack/base.js b/frontend/webpack/base.js
index a1d0df01..4fe01b16 100644
--- a/frontend/webpack/base.js
+++ b/frontend/webpack/base.js
@@ -22,7 +22,7 @@ const plugins = {
   }),
   'define-plugin': new webpack.DefinePlugin({
     'process.env': {
-      NODE_ENV: JSON.stringify(process.env['NODE_ENV'] || 'development'),
+      NODE_ENV: JSON.stringify(process.env.NODE_ENV || 'development'),
       APP_NAME: JSON.stringify(pkg.name),
       APP_VERSION: JSON.stringify(pkg.version)
     }
diff --git a/ui/docs/root.js b/ui/docs/root.js
index 700a7282..cf432b94 100644
--- a/ui/docs/root.js
+++ b/ui/docs/root.js
@@ -1,6 +1,6 @@
 const React = require('react');
 const ReactHotLoader = require('react-hot-loader');
-const Button = require('../src/components/grid/readme.md');
+const Button = require('../src/components/column/readme.md');
 const InnerHTML = require('dangerously-set-inner-html');
 
 const {
diff --git a/ui/package.json b/ui/package.json
index 837a4195..09469aed 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -13,6 +13,7 @@
   },
   "dependencies": {
     "classnames": "^2.2.5",
+    "lodash.flatten": "^4.4.0",
     "react": "^15.3.2"
   },
   "devDependencies": {
@@ -42,6 +43,7 @@
     "nyc": "^8.3.1",
     "postcss-cssnext": "^2.8.0",
     "postcss-loader": "^1.0.0",
+    "postcss-mixins": "^5.4.0",
     "postcss-modules-values": "^1.2.2",
     "pre-commit": "^1.1.3",
     "raw-loader": "^0.5.1",
diff --git a/ui/src/components/column/index.js b/ui/src/components/column/index.js
new file mode 100644
index 00000000..d3bd8623
--- /dev/null
+++ b/ui/src/components/column/index.js
@@ -0,0 +1,62 @@
+/*
+ * based on
+ * https://github.com/roylee0704/react-flexbox-grid/blob/master/src/components/Col.js
+ */
+
+const flatten = require('lodash.flatten');
+const classNames = require('classnames');
+const React = require('react');
+const styles = require('./style.css');
+
+const breakpoints = [
+  'xs',
+  'sm',
+  'md',
+  'lg'
+];
+
+const getClasses = (props) => {
+  return flatten(breakpoints.map((size) => {
+    const number = props[size];
+    const offset = props[`${size}Offset`];
+
+    return [
+      number ? styles[`${size}-${number}`] : '',
+      offset ? styles[`${size}-offset-${offset}`] : ''
+    ];
+  })).filter(Boolean);
+};
+
+const Column = module.exports = (props) => {
+  const {
+    className,
+    reverse,
+    children,
+    style
+  } = props;
+
+  const cn = classNames(
+    className,
+    styles.column,
+    reverse ? styles.reverse : '',
+    ...getClasses(props)
+  );
+
+  return (
+    <div style={style} className={cn}>
+      {children}
+    </div>
+  );
+};
+
+Column.propTypes = {
+  reverse: React.PropTypes.bool,
+  className: React.PropTypes.string,
+  style: React.PropTypes.object,
+  children: React.PropTypes.node,
+  ...breakpoints.reduce((all, bp) => ({
+    ...all,
+    [`${bp}Offset`]: React.PropTypes.number,
+    [bp]: React.PropTypes.number
+  }), {})
+};
diff --git a/ui/src/components/column/readme.md b/ui/src/components/column/readme.md
new file mode 100644
index 00000000..73363d69
--- /dev/null
+++ b/ui/src/components/column/readme.md
@@ -0,0 +1,64 @@
+# `<Column>`
+
+## demo
+
+```embed
+const React = require('react');
+const ReactDOM = require('react-dom/server');
+const Grid = require('../grid');
+const Row = require('../row');
+const Column = require('./index');
+
+const styles = {
+  grid: {
+    backgroundColor: '#FFEBEE'
+  },
+  row: {
+    backgroundColor: '#EF5350'
+  },
+  column: {
+    backgroundColor: '#B71C1C',
+    textAlign: 'center'
+  },
+  p: {
+    color: 'white'
+  }
+};
+
+nmodule.exports = ReactDOM.renderToString(
+  <Grid style={styles.grid}>
+    <Row style={styles.row} around>
+      <Column style={styles.column} xs={2}>
+        <p style={styles.p}>1</p>
+      </Column>
+      <Column style={styles.column} xs={2}>
+        <p style={styles.p}>2</p>
+      </Column>
+      <Column style={styles.column} xs={2}>
+        <p style={styles.p}>3</p>
+      </Column>
+    </Row>
+  </Grid>
+);
+```
+
+## usage
+
+```js
+const React = require('react');
+const Grid = require('ui/grid');
+const Row = require('ui/row');
+const Column = require('ui/index');
+
+module.exports = () => {
+  return (
+    <Grid>
+      <Row around>
+        <Column xs={2}>1</Column>
+        <Column xs={2}>2</Column>
+        <Column xs={2}>3</Column>
+      </Row>
+    </Grid>
+  );
+};
+```
\ No newline at end of file
diff --git a/ui/src/components/column/style.css b/ui/src/components/column/style.css
new file mode 100644
index 00000000..5afc2a98
--- /dev/null
+++ b/ui/src/components/column/style.css
@@ -0,0 +1,152 @@
+/*
+ * based on
+ * https://github.com/kristoferjoseph/flexboxgrid/blob/master/dist/flexboxgrid.css
+ */
+
+@value half-gutter-width from "../../constants/sizes.css";
+@value sm-viewport, md-viewport, lg-viewport from "../../constants/breakpoints.css";
+
+:root {
+  --half-gutter-width: half-gutter-width;
+}
+
+@define-mixin viewport $size {
+  &.$(size) {
+    flex-grow: 1;
+    flex-basis: 0;
+    max-width: 100%;
+  }
+
+  &.$(size)-1 {
+    flex-basis: 8.33333333%;
+    max-width: 8.33333333%;
+  }
+
+  &.$(size)-2 {
+    flex-basis: 16.66666667%;
+    max-width: 16.66666667%;
+  }
+
+  &.$(size)-3 {
+    flex-basis: 25%;
+    max-width: 25%;
+  }
+
+  &.$(size)-4 {
+    flex-basis: 33.33333333%;
+    max-width: 33.33333333%;
+  }
+
+  &.$(size)-5 {
+    flex-basis: 41.66666667%;
+    max-width: 41.66666667%;
+  }
+
+  &.$(size)-6 {
+    flex-basis: 50%;
+    max-width: 50%;
+  }
+
+  &.$(size)-7 {
+    flex-basis: 58.33333333%;
+    max-width: 58.33333333%;
+  }
+
+  &.$(size)-8 {
+    flex-basis: 66.66666667%;
+    max-width: 66.66666667%;
+  }
+
+  &.$(size)-9 {
+    flex-basis: 75%;
+    max-width: 75%;
+  }
+
+  &.$(size)-10 {
+    flex-basis: 83.33333333%;
+    max-width: 83.33333333%;
+  }
+
+  &.$(size)-11 {
+    flex-basis: 91.66666667%;
+    max-width: 91.66666667%;
+  }
+
+  &.$(size)-12 {
+    flex-basis: 100%;
+    max-width: 100%;
+  }
+
+  &.$(size)-offset-0 {
+    margin-left: 0;
+  }
+
+  &.$(size)-offset-1 {
+    margin-left: 8.33333333%;
+  }
+
+  &.$(size)-offset-2 {
+    margin-left: 16.66666667%;
+  }
+
+  &.$(size)-offset-3 {
+    margin-left: 25%;
+  }
+
+  &.$(size)-offset-4 {
+    margin-left: 33.33333333%;
+  }
+
+  &.$(size)-offset-5 {
+    margin-left: 41.66666667%;
+  }
+
+  &.$(size)-offset-6 {
+    margin-left: 50%;
+  }
+
+  &.$(size)-offset-7 {
+    margin-left: 58.33333333%;
+  }
+
+  &.$(size)-offset-8 {
+    margin-left: 66.66666667%;
+  }
+
+  &.$(size)-offset-9 {
+    margin-left: 75%;
+  }
+
+  &.$(size)-offset-10 {
+    margin-left: 83.33333333%;
+  }
+
+  &.$(size)-offset-11 {
+    margin-left: 91.66666667%;
+  }
+}
+
+.column {
+  box-sizing: border-box;
+  flex: 0 0 auto;
+  padding-right: var(--half-gutter-width, 0.5rem);
+  padding-left: var(--half-gutter-width, 0.5rem);
+
+  &.reverse {
+    flex-direction: column-reverse;
+  }
+
+  @mixin viewport xs;
+
+  @media sm-viewport {
+    @mixin viewport sm;
+  }
+
+  @media md-viewport {
+    @mixin viewport md;
+  }
+
+  @media lg-viewport {
+    @mixin viewport lg;
+  }
+}
diff --git a/ui/src/components/grid/index.js b/ui/src/components/grid/index.js
index d2b0e98c..11a35b8b 100644
--- a/ui/src/components/grid/index.js
+++ b/ui/src/components/grid/index.js
@@ -1,16 +1,25 @@
-// based on https://github.com/roylee0704/react-flexbox-grid/blob/master/src/components/Grid.js
+/*
+ * based on
+ * https://github.com/roylee0704/react-flexbox-grid/blob/master/src/components/Grid.js
+ */
 
 const React = require('react');
-const style = require('./style.css');
+const classNames = require('classnames');
+const styles = require('./style.css');
 
 const Grid = module.exports = ({
   fluid = false,
-  children
+  className,
+  children,
+  style
 }) => {
-  const className = style[fluid ? 'container-fluid' : 'container'];
+  const cn = classNames(
+    className,
+    styles[fluid ? 'container-fluid' : 'container']
+  );
 
   return (
-    <div className={className}>
+    <div style={style} className={cn}>
       {children}
     </div>
   );
@@ -18,5 +27,7 @@ const Grid = module.exports = ({
 
 Grid.propTypes = {
   fluid: React.PropTypes.bool,
+  className: React.PropTypes.string,
+  style: React.PropTypes.object,
   children: React.PropTypes.node
-}
+};
diff --git a/ui/src/components/grid/style.css b/ui/src/components/grid/style.css
index d84c891d..7c9a26b1 100644
--- a/ui/src/components/grid/style.css
+++ b/ui/src/components/grid/style.css
@@ -21,20 +21,16 @@
   padding-left: var(--outer-margin);
 }
 
-@media sm-viewport {
-  .container {
+.container {
+  @media sm-viewport {
     width: var(--container-sm, 46rem);
   }
-}
 
-@media md-viewport {
-  .container {
+  @media md-viewport {
     width: var(--container-md, 61rem);
   }
-}
 
-@media lg-viewport {
-  .container {
+  @media lg-viewport {
     width: var(--container-lg, 71rem);
   }
 }
diff --git a/ui/src/components/row/index.js b/ui/src/components/row/index.js
new file mode 100644
index 00000000..0a11669a
--- /dev/null
+++ b/ui/src/components/row/index.js
@@ -0,0 +1,92 @@
+/*
+ * based on
+ * https://github.com/roylee0704/react-flexbox-grid/blob/master/src/components/Row.js
+ */
+
+const flatten = require('lodash.flatten');
+const classNames = require('classnames');
+const React = require('react');
+const styles = require('./style.css');
+
+const breakpoints = [
+  'xs',
+  'sm',
+  'md',
+  'lg'
+];
+
+const modifiers = [
+  'start',
+  'center',
+  'end',
+  'top',
+  'middle',
+  'bottom',
+  'around',
+  'between',
+  'first',
+  'last'
+];
+
+const getClasses = (props) => {
+  return flatten(modifiers.map((name) => {
+    const value = props[name];
+
+    if (!value) {
+      return;
+    }
+
+    const bps = (() => {
+      if (value === true) {
+        return breakpoints
+      }
+
+      if (Array.isArray(value)) {
+        return value;
+      }
+
+      return [value];
+    })();
+
+    return flatten(bps.map(bp => styles[`${name}-${bp}`]));
+  })).filter(Boolean);
+};
+
+const Row = module.exports = (props) => {
+  const {
+    className,
+    reverse,
+    children,
+    style
+  } = props;
+
+  const cn = classNames(
+    className,
+    styles.row,
+    reverse ? styles.reverse : '',
+    ...getClasses(props)
+  );
+
+  return (
+    <div style={style} className={cn}>
+      {children}
+    </div>
+  );
+};
+
+const ModificatorType = React.PropTypes.oneOfType([
+  React.PropTypes.bool,
+  React.PropTypes.arrayOf(React.PropTypes.oneOf(breakpoints)),
+  React.PropTypes.oneOf(breakpoints)
+]);
+
+Row.propTypes = {
+  reverse: React.PropTypes.bool,
+  className: React.PropTypes.string,
+  style: React.PropTypes.object,
+  children: React.PropTypes.node,
+  ...modifiers.reduce((all, m) => ({
+    ...all,
+    [m]: ModificatorType
+  }), {})
+};
diff --git a/ui/src/components/row/readme.md b/ui/src/components/row/readme.md
new file mode 100644
index 00000000..50c7ad08
--- /dev/null
+++ b/ui/src/components/row/readme.md
@@ -0,0 +1,22 @@
+# `<Row>`
+
+## demo
+
+```embed
+const React = require('react');
+const ReactDOM = require('react-dom/server');
+const Row = require('./index.js');
+const Grid = require('../grid');
+const Button = require('../button');
+
+nmodule.exports = ReactDOM.renderToString(
+  <Grid>
+    <Row center='xs' start='sm'>
+      <Button>1</Button>
+      <Button>2</Button>
+    </Row>
+  </Grid>
+);
+```
+
+## usage
diff --git a/ui/src/components/row/style.css b/ui/src/components/row/style.css
new file mode 100644
index 00000000..35e7cdbd
--- /dev/null
+++ b/ui/src/components/row/style.css
@@ -0,0 +1,85 @@
+/*
+ * based on
+ * https://github.com/kristoferjoseph/flexboxgrid/blob/master/dist/flexboxgrid.css
+ */
+
+@value gutter-compensation from "../../constants/sizes.css";
+@value sm-viewport, md-viewport, lg-viewport from "../../constants/breakpoints.css";
+
+:root {
+  --outer-margin: outer-margin;
+  --gutter-compensation: gutter-compensation;
+}
+
+@define-mixin viewport $size {
+  &.start-$(size) {
+    justify-content: flex-start;
+    text-align: start;
+  }
+
+  &.center-$(size) {
+    justify-content: center;
+    text-align: center;
+  }
+
+  &.end-$(size) {
+    justify-content: flex-end;
+    text-align: end;
+  }
+
+  &.top-$(size) {
+    align-items: flex-start;
+  }
+
+  &.middle-$(size) {
+    align-items: center;
+  }
+
+  &.bottom-$(size) {
+    align-items: flex-end;
+  }
+
+  &.around-$(size) {
+    justify-content: space-around;
+  }
+
+  &.between-$(size) {
+    justify-content: space-between;
+  }
+
+  &.first-$(size) {
+    order: -1;
+  }
+
+  &.last-$(size) {
+    order: 1;
+  }
+}
+
+.row {
+  box-sizing: border-box;
+  display: flex;
+  flex: 0 1 auto;
+  flex-direction: row;
+  flex-wrap: wrap;
+  margin-right: var(--gutter-compensation, -0.5rem);
+  margin-left: var(--gutter-compensation, -0.5rem);
+
+  &.reverse {
+    flex-direction: row-reverse;
+  }
+
+  @mixin viewport xs;
+
+  @media sm-viewport {
+    @mixin viewport sm;
+  }
+
+  @media md-viewport {
+    @mixin viewport md;
+  }
+
+  @media lg-viewport {
+    @mixin viewport lg;
+  }
+}
diff --git a/ui/webpack/base.js b/ui/webpack/base.js
index 2d3299ff..0586093f 100644
--- a/ui/webpack/base.js
+++ b/ui/webpack/base.js
@@ -13,6 +13,7 @@ const plugins = {
       postcss: {
         plugins: [
           require('postcss-modules-values'),
+          require('postcss-mixins')(),
           require('postcss-cssnext')()
         ]
       },
diff --git a/ui/yarn.lock b/ui/yarn.lock
index 4b83c123..b8b55c2d 100644
--- a/ui/yarn.lock
+++ b/ui/yarn.lock
@@ -1272,6 +1272,10 @@ callsites@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/callsites/-/callsites-0.2.0.tgz#afab96262910a7f33c19a5775825c69f34e350ca"
 
+camelcase-css@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/camelcase-css/-/camelcase-css-1.0.1.tgz#157c4238265f5cf94a1dffde86446552cbf3f705"
+
 camelcase-keys@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-2.1.0.tgz#308beeaffdf28119051efa1d932213c91b8f92e7"
@@ -2671,6 +2675,16 @@ globby@^5.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
+globby@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-6.0.0.tgz#8f5710eda32296ac53f011a97dccc70e936685dc"
+  dependencies:
+    array-union "^1.0.1"
+    glob "^7.0.3"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
 got@^5.0.0:
   version "5.6.0"
   resolved "https://registry.yarnpkg.com/got/-/got-5.6.0.tgz#bb1d7ee163b78082bbc8eb836f3f395004ea6fbf"
@@ -3437,7 +3451,7 @@ lodash.filter@^4.4.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/lodash.filter/-/lodash.filter-4.6.0.tgz#668b1d4981603ae1cc5a6fa760143e480b4c4ace"
 
-lodash.flatten@^4.2.0, lodash.flatten@^4.4.0:
+lodash.flatten, lodash.flatten@^4.2.0, lodash.flatten@^4.4.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/lodash.flatten/-/lodash.flatten-4.4.0.tgz#f31c22225a9632d2bbf8e4addbef240aa765a61f"
 
@@ -4363,6 +4377,13 @@ postcss-initial@^1.3.1:
     lodash.template "^4.2.4"
     postcss "^5.0.19"
 
+postcss-js@^0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/postcss-js/-/postcss-js-0.1.3.tgz#8c0a5daa1c918b3073c4806a3c5b332c67250c03"
+  dependencies:
+    camelcase-css "^1.0.1"
+    postcss "^5.0.21"
+
 postcss-load-config@^1.0.0-rc:
   version "1.0.0-rc"
   resolved "https://registry.yarnpkg.com/postcss-load-config/-/postcss-load-config-1.0.0-rc.tgz#8aed0d0fb94afe2c1ab0ba2ca69da3af5079e2cc"
@@ -4458,6 +4479,16 @@ postcss-minify-selectors@^2.0.4:
     postcss "^5.0.14"
     postcss-selector-parser "^2.0.0"
 
+postcss-mixins:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/postcss-mixins/-/postcss-mixins-5.4.0.tgz#68b4705d1f2c505921f4a2f55bcf72a03b56fc01"
+  dependencies:
+    globby "^6.0.0"
+    postcss "^5.2.4"
+    postcss-js "^0.1.3"
+    postcss-simple-vars "^3.0.0"
+    sugarss "^0.2.0"
+
 postcss-modules-extract-imports@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/postcss-modules-extract-imports/-/postcss-modules-extract-imports-1.0.1.tgz#8fb3fef9a6dd0420d3f6d4353cf1ff73f2b2a341"
@@ -4582,6 +4613,12 @@ postcss-selector-parser@^2.0.0, postcss-selector-parser@^2.2.0:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
+postcss-simple-vars@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/postcss-simple-vars/-/postcss-simple-vars-3.0.0.tgz#1fa4ccb4b7151d9f0d52fb8ea19a15c1319599d6"
+  dependencies:
+    postcss "^5.0.21"
+
 postcss-svgo@^2.1.1:
   version "2.1.5"
   resolved "https://registry.yarnpkg.com/postcss-svgo/-/postcss-svgo-2.1.5.tgz#46fc0363f01bab6a36a9abb01c229fcc45363094"
@@ -5456,6 +5493,12 @@ style-loader@^0.13.1:
   dependencies:
     loader-utils "^0.2.7"
 
+sugarss@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/sugarss/-/sugarss-0.2.0.tgz#ac34237563327c6ff897b64742bf6aec190ad39e"
+  dependencies:
+    postcss "^5.2.4"
+
 supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"