Dark Mode (#912)

closes #704

shared/styles/globals.js

@@ -1,9 +1,86 @@
 // @flow
 import styledNormalize from 'styled-normalize';
 import { createGlobalStyle } from 'styled-components';
-import base from './base';
 
 export default createGlobalStyle`
   ${styledNormalize}
-  ${base}
+
+  @font-face {
+    font-family: 'Lato';
+    src: url('/fonts/LatoLatin-Semibold.woff') format('woff');
+  }
+
+  * {
+    box-sizing: border-box;
+  }
+
+  html,
+  body {
+    width: 100%;
+    min-height: 100vh;
+    margin: 0;
+    padding: 0;
+  }
+
+  body,
+  button,
+  input,
+  optgroup,
+  select,
+  textarea {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
+      Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+  }
+
+  body {
+    font-size: 16px;
+    line-height: 1.5;
+    color: ${props => props.theme.text};
+
+    -moz-osx-font-smoothing: grayscale;
+    -webkit-font-smoothing: antialiased;
+    text-rendering: optimizeLegibility;
+  }
+
+  a {
+    color: ${props => props.theme.primary};
+    text-decoration: none;
+    cursor: pointer;
+  }
+
+  h1,
+  h2,
+  h3,
+  h4,
+  h5,
+  h6 {
+    font-family: 'Lato',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen, Ubuntu,Cantarell,'Open Sans','Helvetica Neue',sans-serif;
+    font-weight: 500;
+    line-height: 1.25;
+    margin-top: 1em;
+    margin-bottom: 0.5em;
+    color: ${props => props.theme.text};
+  }
+  h1 { font-size: 2.25em; }
+  h2 { font-size: 1.5em; }
+  h3 { font-size: 1.25em; }
+  h4 { font-size: 1em; }
+  h5 { font-size: 0.875em; }
+  h6 { font-size: 0.75em; }
+
+  p,
+  dl,
+  ol,
+  ul,
+  pre,
+  blockquote {
+    margin-top: 1em;
+    margin-bottom: 1em;
+  }
+
+  hr {
+    border: 0;
+    height: 0;
+    border-top: 1px solid ${props => props.theme.divider};
+  }
 `;