5 files changed, 129 insertions, 0 deletions
diff --git a/packages/instant/src/style/fonts.ts b/packages/instant/src/style/fonts.ts
new file mode 100644
index 000000000..92450502d
--- /dev/null
+++ b/packages/instant/src/style/fonts.ts
@@ -0,0 +1,10 @@
+export const fonts = {
+    include: () => {
+        // Inject the inter-ui font into the page
+        const appendTo = document.head || document.getElementsByTagName('head')[0] || document.body;
+        const style = document.createElement('style');
+        style.type = 'text/css';
+        style.appendChild(document.createTextNode(`@import url('https://rsms.me/inter/inter-ui.css')`));
+        appendTo.appendChild(style);
+    },
+};
diff --git a/packages/instant/src/style/media.ts b/packages/instant/src/style/media.ts
new file mode 100644
index 000000000..bbf376694
--- /dev/null
+++ b/packages/instant/src/style/media.ts
@@ -0,0 +1,51 @@
+import { InterpolationValue } from 'styled-components';
+
+import { css } from './theme';
+
+export enum ScreenWidths {
+    Sm = 40,
+    Md = 52,
+    Lg = 64,
+}
+
+export const generateMediaWrapper = (screenWidth: ScreenWidths) => (...args: any[]) => css`
+    @media (max-width: ${screenWidth}em) {
+        ${css.apply(css, args)};
+    }
+`;
+
+export const media = {
+    small: generateMediaWrapper(ScreenWidths.Sm),
+    medium: generateMediaWrapper(ScreenWidths.Md),
+    large: generateMediaWrapper(ScreenWidths.Lg),
+};
+
+export interface ScreenSpecification<T> {
+    default: T;
+    sm?: T;
+    md?: T;
+    lg?: T;
+}
+export type OptionallyScreenSpecific<T> = T | ScreenSpecification<T>;
+export type MediaChoice = OptionallyScreenSpecific<string>;
+/**
+ * Given a css property name and a OptionallyScreenSpecific value,
+ * generates css properties with screen-specific viewport styling
+ */
+export function stylesForMedia<T extends string | number>(
+    cssPropertyName: string,
+    choice: OptionallyScreenSpecific<T>,
+): InterpolationValue[] {
+    if (typeof choice === 'object') {
+        return css`
+        ${cssPropertyName}: ${choice.default};
+        ${choice.lg && media.large`${cssPropertyName}: ${choice.lg}`}
+        ${choice.md && media.medium`${cssPropertyName}: ${choice.md}`}
+        ${choice.sm && media.small`${cssPropertyName}: ${choice.sm}`}
+    `;
+    } else {
+        return css`
+            ${cssPropertyName}: ${choice};
+        `;
+    }
+}
diff --git a/packages/instant/src/style/theme.ts b/packages/instant/src/style/theme.ts
new file mode 100644
index 000000000..a0751286b
--- /dev/null
+++ b/packages/instant/src/style/theme.ts
@@ -0,0 +1,48 @@
+import * as styledComponents from 'styled-components';
+
+const { default: styled, css, keyframes, withTheme, createGlobalStyle, ThemeProvider } = styledComponents;
+
+export type Theme = { [key in ColorOption]: string };
+
+export enum ColorOption {
+    primaryColor = 'primaryColor',
+    black = 'black',
+    lightGrey = 'lightGrey',
+    grey = 'grey',
+    feintGrey = 'feintGrey',
+    lightestGrey = 'lightestGrey',
+    darkGrey = 'darkGrey',
+    white = 'white',
+    lightOrange = 'lightOrange',
+    darkOrange = 'darkOrange',
+    green = 'green',
+    red = 'red',
+    darkBlue = 'darkBlue',
+    lightBlue = 'lightBlue',
+}
+
+export const theme: Theme = {
+    primaryColor: '#333',
+    black: 'black',
+    lightGrey: '#999999',
+    grey: '#666666',
+    feintGrey: '#DEDEDE',
+    lightestGrey: '#EEEEEE',
+    darkGrey: '#333333',
+    white: 'white',
+    lightOrange: '#F9F2ED',
+    darkOrange: '#F2994C',
+    green: '#3CB34F',
+    red: '#D00000',
+    darkBlue: '#135df6',
+    lightBlue: '#F2F7FF',
+};
+
+export const transparentWhite = 'rgba(255,255,255,0.3)';
+export const completelyTransparent = 'rga(0, 0, 0, 0)';
+
+export const generateOverlayBlack = (opacity = 0.6) => {
+    return `rgba(0, 0, 0, ${opacity})`;
+};
+
+export { styled, css, keyframes, withTheme, createGlobalStyle, ThemeProvider };
diff --git a/packages/instant/src/style/util.ts b/packages/instant/src/style/util.ts
new file mode 100644
index 000000000..3e38c4a7d
--- /dev/null
+++ b/packages/instant/src/style/util.ts
@@ -0,0 +1,11 @@
+import { ObjectMap } from '@0x/types';
+import * as _ from 'lodash';
+
+export const cssRuleIfExists = (props: ObjectMap<any>, rule: string): string => {
+    const camelCaseRule = _.camelCase(rule);
+    const ruleValueIfExists = props[camelCaseRule];
+    if (!_.isUndefined(ruleValueIfExists)) {
+        return `${rule}: ${ruleValueIfExists};`;
+    }
+    return '';
+};
diff --git a/packages/instant/src/style/z_index.ts b/packages/instant/src/style/z_index.ts
new file mode 100644
index 000000000..ba2d27a17
--- /dev/null
+++ b/packages/instant/src/style/z_index.ts
@@ -0,0 +1,9 @@
+export const zIndex = {
+    errorPopBehind: 10,
+    mainContainer: 20,
+    dropdownItems: 30,
+    panel: 40,
+    containerOverlay: 45,
+    errorPopup: 50,
+    overlayDefault: 100,
+};