style.css

/* Eric Meyer's Reset CSS v2.0 
   http://meyerweb.com/eric/tools/css/reset
 * http://cssreset.com
 */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block;
}

body {
  line-height: 1;
}

ul {
  list-style: none;
}

blockquote, q {
  quotes: none;
}

blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Box sizing reset 
   Thanks to Paul Irish
   http://www.paulirish.com/2012/box-sizing-border-box-ftw/ */
html {
  box-sizing: border-box;
}

*, *:before, *:after {
  box-sizing: inherit;
}

.not-supported {
  border-left: 5px solid #c0392b;
}

.not-supported .overlay {
  background-color: rgba(192, 57, 43, 0.4);
}

.partial-support {
  border-left: 5px solid #f39c12;
}

.partial-support .overlay {
  background-color: rgba(243, 156, 18, 0.4);
}

html {
  font-size: 62.5%;
  background-color: #fafafa;
}

body {
  font-size: 1.6rem;
  font-family: 'Source Sans Pro', sans-serif;
  font-weight: 400;
  line-height: 1.4;
  color: #323232;
}

.site-title {
  font-weight: 700;
  font-size: 1.8rem;
}

.previously-text {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
}

h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.subheading {
  margin-bottom: 15px;
}

strong {
  font-weight: 700;
}

.site-footer,
.sh-info {
  font-size: 1.4rem;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 15px;
}

p {
  margin-bottom: 1.5rem;
}

img {
  max-width: 100%;
}

.btn {
  font-size: 1.5rem;
  font-weight: 700;
}

a {
  text-decoration: underline;
  color: #000;
}

.no-ul a,
.btn a,
a.btn {
  text-decoration: none;
}

.code-font {
  font-family: 'Source Code Pro';
  font-size: 1.4rem;
}

li.feature {
  font-size: 1.4rem;
}

.github-gist-star {
  text-decoration: none;
  font-size: 1.2rem;
}

html,
body {
  background-color: whitesmoke;
}

.container {
  margin: 0 auto;
  width: 100%;
  max-width: 780px;
  padding: 0 15px;
}

.site-section {
  background-color: #fff;
  display: block;
  width: 100%;
  margin-bottom: 3rem;
}

.site-section:not(.no-padd) {
  padding: 10px 20px;
}

.site-header {
  margin-bottom: 70px;
  background-color: #eee9e9;
  text-align: left;
  padding: 20px 0;
}

.site-main {
  min-height: 600px;
  position: relative;
}

.site-footer {
  background-color: #eee9e9;
  padding: 20px 0;
  text-align: center;
  margin-top: 50px;
}

.branding,
.sh-info {
  display: block;
  text-align: center;
}

.branding img {
  width: 55px;
  height: auto;
  display: block;
  margin: 0 auto 15px;
}

.sh-info {
  padding-top: 5px;
  max-width: 400px;
  margin: 0 auto;
}

.sh-info p {
  display: block;
  margin-bottom: 3px;
}

.social-buttons {
  position: absolute;
  top: 20px;
  left: 20px;
}

.twitter-share-button {
  margin-right: 10px;
}

.btn {
  display: inline-block;
  cursor: pointer;
  margin: 0 5px 10px;
  padding: 5px;
  background-color: #fff;
  border: 1px solid #eee9e9;
  border-bottom: 5px solid #eee9e9;
  position: relative;
}

.btn .text {
  position: relative;
  z-index: 2;
}

.btn .overlay {
  display: block;
  width: 100%;
  height: 1px;
  position: absolute;
  bottom: 0;
  left: 0;
  transition: height 0.5s;
  background-color: #eee9e9;
  z-index: 1;
}

.btn.active .overlay,
.btn:hover .overlay {
  height: 100%;
  transition: height 0.5s;
}

.loading-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-align: center;
  background-color: whitesmoke;
  z-index: 3;
}

.loading-container img {
  width: 100px;
  height: auto;
}

.loading-container:not(.hidden) {
  display: block;
}

.loading-container.hidden {
  display: none;
}

.feature-list {
  text-align: center;
}

li.feature {
  list-style-type: none;
  width: auto;
  background-color: #fff;
  display: inline-block;
  margin: 0 10px 20px;
  position: relative;
}

li.feature a {
  display: block;
  width: 100%;
  height: 100%;
  padding: 5px 10px;
  z-index: 2;
  position: relative;
}

li.feature .overlay {
  display: block;
  width: 1px;
  height: 100%;
  position: absolute;
  transition: width 1s;
}

li.feature:hover .overlay {
  width: 100%;
  transition: width 1s;
}

.filter-features {
  margin: 30px 0;
  display: block;
  text-align: center;
}

.search-field {
  height: 40px;
  width: 300px;
  background-color: #fff;
  border: 1px solid #eee9e9;
  border-bottom: 5px solid #eee9e9;
  margin: 0 auto 40px;
  display: inherit;
  font-size: 1.6rem;
  font-family: 'Source Sans Pro', sans-serif;
  font-weight: 400;
  line-height: 1;
  color: #323232;
  padding: 0 5px;
  outline: none;
}

.search-field:focus {
  background-color: #eee9e9;
}

ul.bullet-list {
  margin-bottom: 15px;
  list-style: disc;
  list-style-position: outside;
  padding-left: 20px;
}

section.workarounds {
  margin: 50px 0;
}

.workaround {
  background-color: #fff;
  margin-bottom: 40px;
  width: 100%;
}