@charset "UTF-8";
/*! normalize.css v2.1.3 | MIT License | git.io/normalize */
/* ==========================================================================
   HTML5 display definitions
   ========================================================================== */
/**
 * Correct `block` display not defined in IE 8/9.
 */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
main,
nav,
section,
summary {
  display: block; }

/**
 * Correct `inline-block` display not defined in IE 8/9.
 */
audio,
canvas,
video {
  display: inline-block; }

/**
 * Prevent modern browsers from displaying `audio` without controls.
 * Remove excess height in iOS 5 devices.
 */
audio:not([controls]) {
  display: none;
  height: 0; }

/**
 * Address `[hidden]` styling not present in IE 8/9.
 * Hide the `template` element in IE, Safari, and Firefox < 22.
 */
[hidden],
template {
  display: none; }

/* ==========================================================================
   Base
   ========================================================================== */
/**
 * 1. Set default font family to sans-serif.
 * 2. Prevent iOS text size adjust after orientation change, without disabling
 *    user zoom.
 */
html {
  font-family: sans-serif;
  /* 1 */
  -ms-text-size-adjust: 100%;
  /* 2 */
  -webkit-text-size-adjust: 100%;
  /* 2 */ }

/**
 * Remove default margin.
 */
body {
  margin: 0; }

/* ==========================================================================
   Links
   ========================================================================== */
/**
 * Remove the gray background color from active links in IE 10.
 */
a {
  background: transparent; }

/**
 * Address `outline` inconsistency between Chrome and other browsers.
 */
a:focus {
  outline: thin dotted; }

/**
 * Improve readability when focused and also mouse hovered in all browsers.
 */
a:active,
a:hover {
  outline: 0; }

/* ==========================================================================
   Typography
   ========================================================================== */
/**
 * Address variable `h1` font-size and margin within `section` and `article`
 * contexts in Firefox 4+, Safari 5, and Chrome.
 */
h1 {
  font-size: 2em;
  margin: 0.67em 0; }

/**
 * Address styling not present in IE 8/9, Safari 5, and Chrome.
 */
abbr[title] {
  border-bottom: 1px dotted; }

/**
 * Address style set to `bolder` in Firefox 4+, Safari 5, and Chrome.
 */
b,
strong {
  font-weight: bold; }

/**
 * Address styling not present in Safari 5 and Chrome.
 */
dfn {
  font-style: italic; }

/**
 * Address differences between Firefox and other browsers.
 */
hr {
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  height: 0; }

/**
 * Address styling not present in IE 8/9.
 */
mark {
  background: #ff0;
  color: #000; }

/**
 * Correct font family set oddly in Safari 5 and Chrome.
 */
code,
kbd,
pre,
samp {
  font-family: monospace, serif;
  font-size: 1em; }

/**
 * Improve readability of pre-formatted text in all browsers.
 */
pre {
  white-space: pre-wrap; }

/**
 * Set consistent quote types.
 */
q {
  quotes: "\201C" "\201D" "\2018" "\2019"; }

/**
 * Address inconsistent and variable font size in all browsers.
 */
small {
  font-size: 80%; }

/**
 * Prevent `sub` and `sup` affecting `line-height` in all browsers.
 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline; }

sup {
  top: -0.5em; }

sub {
  bottom: -0.25em; }

/* ==========================================================================
   Embedded content
   ========================================================================== */
/**
 * Remove border when inside `a` element in IE 8/9.
 */
img {
  border: 0; }

/**
 * Correct overflow displayed oddly in IE 9.
 */
svg:not(:root) {
  overflow: hidden; }

/* ==========================================================================
   Figures
   ========================================================================== */
/**
 * Address margin not present in IE 8/9 and Safari 5.
 */
figure {
  margin: 0; }

/* ==========================================================================
   Forms
   ========================================================================== */
/**
 * Define consistent border, margin, and padding.
 */
fieldset {
  border: 1px solid #c0c0c0;
  margin: 0 2px;
  padding: 0.35em 0.625em 0.75em; }

/**
 * 1. Correct `color` not being inherited in IE 8/9.
 * 2. Remove padding so people aren't caught out if they zero out fieldsets.
 */
legend {
  border: 0;
  /* 1 */
  padding: 0;
  /* 2 */ }

/**
 * 1. Correct font family not being inherited in all browsers.
 * 2. Correct font size not being inherited in all browsers.
 * 3. Address margins set differently in Firefox 4+, Safari 5, and Chrome.
 */
button,
input,
select,
textarea {
  font-family: inherit;
  /* 1 */
  font-size: 100%;
  /* 2 */
  margin: 0;
  /* 3 */ }

/**
 * Address Firefox 4+ setting `line-height` on `input` using `!important` in
 * the UA stylesheet.
 */
button,
input {
  line-height: normal; }

/**
 * Address inconsistent `text-transform` inheritance for `button` and `select`.
 * All other form control elements do not inherit `text-transform` values.
 * Correct `button` style inheritance in Chrome, Safari 5+, and IE 8+.
 * Correct `select` style inheritance in Firefox 4+ and Opera.
 */
button,
select {
  text-transform: none; }

/**
 * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
 *    and `video` controls.
 * 2. Correct inability to style clickable `input` types in iOS.
 * 3. Improve usability and consistency of cursor style between image-type
 *    `input` and others.
 */
button,
html input[type="button"],
input[type="reset"],
input[type="submit"] {
  -webkit-appearance: button;
  /* 2 */
  cursor: pointer;
  /* 3 */ }

/**
 * Re-set default cursor for disabled elements.
 */
button[disabled],
html input[disabled] {
  cursor: default; }

/**
 * 1. Address box sizing set to `content-box` in IE 8/9/10.
 * 2. Remove excess padding in IE 8/9/10.
 */
input[type="checkbox"],
input[type="radio"] {
  box-sizing: border-box;
  /* 1 */
  padding: 0;
  /* 2 */ }

/**
 * 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome.
 * 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome
 *    (include `-moz` to future-proof).
 */
input[type="search"] {
  -webkit-appearance: textfield;
  /* 1 */
  -moz-box-sizing: content-box;
  -webkit-box-sizing: content-box;
  /* 2 */
  box-sizing: content-box; }

/**
 * Remove inner padding and search cancel button in Safari 5 and Chrome
 * on OS X.
 */
input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none; }

/**
 * Remove inner padding and border in Firefox 4+.
 */
button::-moz-focus-inner,
input::-moz-focus-inner {
  border: 0;
  padding: 0; }

/**
 * 1. Remove default vertical scrollbar in IE 8/9.
 * 2. Improve readability and alignment in all browsers.
 */
textarea {
  overflow: auto;
  /* 1 */
  vertical-align: top;
  /* 2 */ }

/* ==========================================================================
   Tables
   ========================================================================== */
/**
 * Remove most spacing between table cells.
 */
table {
  border-collapse: collapse;
  border-spacing: 0; }

/**
 * prism.js default theme for JavaScript, CSS and HTML
 * Based on dabblet (http://dabblet.com)
 * @author Lea Verou
 */
code[class*="language-"],
pre[class*="language-"] {
  color: black;
  text-shadow: 0 1px white;
  font-family: Consolas, Monaco, 'Andale Mono', monospace;
  direction: ltr;
  text-align: left;
  white-space: pre;
  word-spacing: normal;
  -moz-tab-size: 4;
  -o-tab-size: 4;
  tab-size: 4;
  -webkit-hyphens: none;
  -moz-hyphens: none;
  -ms-hyphens: none;
  hyphens: none; }

pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
  text-shadow: none;
  background: #b3d4fc; }

pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
code[class*="language-"]::selection, code[class*="language-"] ::selection {
  text-shadow: none;
  background: #b3d4fc; }

@media print {
  code[class*="language-"],
  pre[class*="language-"] {
    text-shadow: none; } }
/* Code blocks */
pre[class*="language-"] {
  padding: 1em;
  margin: .5em 0;
  overflow: auto; }

:not(pre) > code[class*="language-"],
pre[class*="language-"] {
  background: #f5f2f0; }

/* Inline code */
:not(pre) > code[class*="language-"] {
  padding: .1em;
  border-radius: .3em; }

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: slategray; }

.token.punctuation {
  color: #999; }

.namespace {
  opacity: .7; }

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol {
  color: #905; }

.token.selector,
.token.attr-name,
.token.string,
.token.builtin {
  color: #690; }

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string,
.token.variable {
  color: #a67f59;
  background: rgba(255, 255, 255, 0.5); }

.token.atrule,
.token.attr-value,
.token.keyword {
  color: #07a; }

.token.regex,
.token.important {
  color: #e90; }

.token.important {
  font-weight: bold; }

.token.entity {
  cursor: help; }

*,
*:after,
*:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box; }

* {
  margin: 0;
  padding: 0;
  border: 0;
  outline: none; }

.amp {
  font-family: Palatino, "Book Antiqua", serif;
  font-style: italic; }

.separator {
  display: block;
  margin: 1rem 0 0;
  font-size: 0.8rem;
  text-align: center;
  color: #e7e7e7;
  pointer-events: none; }

a {
  color: #f26148;
  font-weight: 700;
  opacity: 0.5;
  pointer-events: none; }
  a[href] {
    opacity: 1;
    pointer-events: auto; }

body {
  -webkit-animation: fade-in 0.3s linear forwards;
  -moz-animation: fade-in 0.3s linear forwards;
  animation: fade-in 0.3s linear forwards;
  max-width: 1000px;
  margin: 0 auto;
  font-family: "museo-slab", serif;
  opacity: 0;
  overflow-x: hidden; }
  @media (max-width: 780px) {
    body {
      padding: 1rem; } }

.home-header {
  margin: 150px auto 0;
  text-align: center; }
  @media (max-width: 780px) {
    .home-header {
      margin: 50px 0 0; } }

.home-footer {
  margin: 4rem auto 150px;
  text-align: center;
  font-size: 0.8rem; }
  .home-footer p {
    margin-top: 1rem; }

.title {
  margin: 2rem 0 0;
  font-size: 2.6rem; }
  @media (max-width: 780px) {
    .title {
      font-size: 1.9rem; } }

.subtitle {
  display: inline-block;
  position: relative;
  margin: 1rem 0 0;
  font-size: 1.1rem; }
  @media (max-width: 780px) {
    .subtitle {
      font-size: 0.8rem; } }
  .subtitle:before, .subtitle:after {
    position: absolute;
    top: 50%;
    height: 2px;
    width: 3rem;
    content: " ";
    background: #e7e7e7; }
    @media (max-width: 780px) {
      .subtitle:before, .subtitle:after {
        display: none; } }
  .subtitle:before {
    left: -4rem; }
  .subtitle:after {
    right: -4rem; }

.chapter-index {
  margin: 3rem auto 0;
  list-style: none; }
  .chapter-index li {
    font-size: 1.1rem;
    margin-top: 1rem;
    text-align: center; }

.chapter {
  max-width: 740px;
  margin-bottom: 150px; }
  .chapter h1:first-of-type {
    margin: 150px auto 0;
    text-align: center; }
    @media (max-width: 780px) {
      .chapter h1:first-of-type {
        margin: 50px 0 0; } }
    .chapter h1:first-of-type:after {
      display: block;
      margin-top: 2rem;
      content: "★";
      font-size: 1.1rem; }
  .chapter p,
  .chapter li,
  .chapter pre {
    margin: 1rem 0 0;
    font-size: 1.1rem;
    line-height: 1.4; }
    @media (max-width: 780px) {
      .chapter p,
      .chapter li,
      .chapter pre {
        font-size: 0.8rem; } }
  .chapter pre {
    font-size: 1rem;
    -webkit-overflow-scrolling: touch; }
  .chapter code {
    font-size: 0.95rem; }
    @media (max-width: 780px) {
      .chapter code {
        font-size: 0.8rem; } }
  .chapter .separator + p:first-letter,
  .chapter h1 + p:first-letter {
    font-size: 150%;
    font-weight: 700;
    line-height: 1; }
  .chapter h1 + p,
  .chapter h2 + p {
    margin-top: 2rem; }
  .chapter h2 {
    margin: 3rem auto 0; }

.language-javascript pre.language-coffeescript {
  display: none; }

.language-coffeescript pre.language-javascript {
  display: none; }

.key {
  display: inline-block;
  padding: 0.25rem;
  font-family: sans-serif;
  color: #e7e7e7;
  background: black;
  text-transform: uppercase;
  border-radius: 0.2rem; }

.toggler-menu {
  -webkit-perspective: 1000px;
  -moz-perspective: 1000px;
  perspective: 1000px;
  position: fixed;
  top: 0;
  right: 4rem;
  font-weight: bold;
  text-transform: uppercase; }
  .toggler-menu .toggler-button {
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition: all 0.5s linear;
    position: relative;
    width: 2rem;
    height: 2rem;
    cursor: pointer; }
  .toggler-menu span {
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    line-height: 2rem;
    background: black;
    color: #e7e7e7;
    text-align: center;
    font-weight: bold;
    font-family: sans-serif;
    box-shadow: 2px 2px 1px rgba(0, 0, 0, 0.15); }
  .toggler-menu .javascript-label {
    -webkit-transform: rotateY(180deg);
    -moz-transform: rotateY(180deg);
    transform: rotateY(180deg); }

.language-javascript .toggler-button {
  -webkit-transform: rotateY(180deg);
  -moz-transform: rotateY(180deg);
  transform: rotateY(180deg); }

@-webkit-keyframes fade-in {
  from {
    opacity: 0; }

  to {
    opacity: 1; } }

@-moz-keyframes fade-in {
  from {
    opacity: 0; }

  to {
    opacity: 1; } }

@keyframes fade-in {
  from {
    opacity: 0; }

  to {
    opacity: 1; } }