/*! normalize.css v3.0.1 | MIT License | git.io/normalize */

/**
* 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;
}

/* HTML5 display definitions
========================================================================== */

/**
* Correct `block` display not defined for any HTML5 element in IE 8/9.
* Correct `block` display not defined for `details` or `summary` in IE 10/11 and Firefox.
* Correct `block` display not defined for `main` in IE 11.
*/

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
main,
nav,
section,
summary {
  display: block;
}

/**
* 1. Correct `inline-block` display not defined in IE 8/9.
* 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
*/

audio,
canvas,
progress,
video {
  display: inline-block; /* 1 */
  vertical-align: baseline; /* 2 */
}

/**
* 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 8/9/10.
* Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
*/

[hidden],
template {
  display: none;
}

/* Links
========================================================================== */

/**
* Remove the gray background color from active links in IE 10.
*/

a {
  background: transparent;
}

/**
* Improve readability when focused and also mouse hovered in all browsers.
*/

a:active,
a:hover {
  outline: 0;
}

/* Text-level semantics
========================================================================== */

/**
* Address styling not present in IE 8/9/10/11, Safari, and Chrome.
*/

abbr[title] {
  border-bottom: 1px dotted;
}

/**
* Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
*/

b,
strong {
  font-weight: bold;
}

/**
* Address styling not present in Safari and Chrome.
*/

dfn {
  font-style: italic;
}

/**
* Address variable `h1` font-size and margin within `section` and `article`
* contexts in Firefox 4+, Safari, and Chrome.
*/

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

/**
* Address styling not present in IE 8/9.
*/

mark {
  background: #ff0;
  color: #000;
}

/**
* 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 8/9/10.
*/

img {
  border: 0;
}

/**
* Correct overflow not hidden in IE 9/10/11.
*/

svg:not(:root) {
  overflow: hidden;
}

/* Grouping content
========================================================================== */

/**
* Address margin not present in IE 8/9 and Safari.
*/

figure {
  margin: 1em 40px;
}

/**
* Address differences between Firefox and other browsers.
*/

hr {
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  height: 0;
}

/**
* Contain overflow in all browsers.
*/

pre {
  overflow: auto;
}

/**
* Address odd `em`-unit font size rendering in all browsers.
*/

code,
kbd,
pre,
samp {
  font-family: monospace, monospace;
  font-size: 1em;
}

/* Forms
========================================================================== */

/**
* Known limitation: by default, Chrome and Safari on OS X allow very limited
* styling of `select`, unless a `border` property is set.
*/

/**
* 1. Correct color not being inherited.
*    Known issue: affects color of disabled elements.
* 2. Correct font properties not being inherited.
* 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
*/

button,
input,
optgroup,
select,
textarea {
  color: inherit; /* 1 */
  font: inherit; /* 2 */
  margin: 0; /* 3 */
}

/**
* Address `overflow` set to `hidden` in IE 8/9/10/11.
*/

button {
  overflow: visible;
}

/**
* 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 Firefox, IE 8/9/10/11, and Opera.
* Correct `select` style inheritance in Firefox.
*/

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"], /* 1 */
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;
}

/**
* Remove inner padding and border in Firefox 4+.
*/

button::-moz-focus-inner,
input::-moz-focus-inner {
  border: 0;
  padding: 0;
}

/**
* Address Firefox 4+ setting `line-height` on `input` using `!important` in
* the UA stylesheet.
*/

input {
  line-height: normal;
}

/**
* It's recommended that you don't attempt to style these elements.
* Firefox's implementation doesn't respect box-sizing, padding, or width.
*
* 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 */
}

/**
* Fix the cursor style for Chrome's increment/decrement buttons. For certain
* `font-size` values of the `input`, it causes the cursor style of the
* decrement button to change from `default` to `text`.
*/

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

/**
* 1. Address `appearance` set to `searchfield` in Safari and Chrome.
* 2. Address `box-sizing` set to `border-box` in Safari 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 and Chrome on OS X.
* Safari (but not Chrome) clips the cancel button when the search input has
* padding (and `textfield` appearance).
*/

input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
* 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 8/9/10/11.
* 2. Remove padding so people aren't caught out if they zero out fieldsets.
*/

legend {
  border: 0; /* 1 */
  padding: 0; /* 2 */
}

/**
* Remove default vertical scrollbar in IE 8/9/10/11.
*/

textarea {
  overflow: auto;
}

/**
* Don't inherit the `font-weight` (applied by a rule above).
* NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
*/

optgroup {
  font-weight: bold;
}

/* Tables
========================================================================== */

/**
* Remove most spacing between table cells.
*/

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

td,
th {
  padding: 0;
}

/* Figure captions */

.caption {
  margin-bottom: 5em;
}

/*! End of normalize.css
========================================================================== */

/* Github styles
========================================================================== */

* {
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  font-size: 12pt;
  line-height: 1.6;
  margin: auto;
  max-width: 920px;
  min-width: 360px;
  padding: 2rem;
  word-wrap: break-word;
}

/* Headers
========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 16px;
  margin-top: 24px;
}
h1 {
  padding-bottom: 0.3em;
  font-size: 2em;
  border-bottom: 1px solid #eee;
}
h2 {
  padding-bottom: 0.3em;
  font-size: 1.5em;
  border-bottom: 1px solid #eee;
}
h3 {
  font-size: 1.25em;;
}
h4 {
  font-size: 1em;
}
h5 {
  font-size: 0.875em;
}
h6 {
  font-size: 0.85em;
  color: #777;
}
h1 tt, h1 code,
h2 tt, h2 code,
h3 tt, h3 code,
h4 tt, h4 code,
h5 tt, h5 code,
h6 tt, h6 code {
  font-size: inherit;
}
body > h2:first-child {
  margin-top: 0;
  padding-top: 0;
}
body > h1:first-child {
  margin-top: 0;
  padding-top: 0;
}
body > h1:first-child+h2 {
  margin-top: 0;
  padding-top: 0;
}
body > h3:first-child,
body > h4:first-child,
body > h5:first-child,
body > h6:first-child {
  margin-top: 0;
  padding-top: 0;
}
a:first-child h1,
a:first-child h2,
a:first-child h3,
a:first-child h4,
a:first-child h5,
a:first-child h6 {
  margin-top: 0;
  padding-top: 0;
}

/* Flow Content
========================================================================== */

a {
  color: #4078c0;
  text-decoration: none;
}
a:active, a:hover {
  outline: 0;
  text-decoration: underline;
}
sup, sub, a.footnote {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}
sub {
  bottom: -0.25em;
}
sup {
  top: -0.5em;
}

/* Block Content
========================================================================== */

ol, ul {
  margin-bottom: 16px;
  margin-top: 0;
  padding-left: 2em;
}
p, blockquote, table, pre {
  margin: 15px 0;
}
ul, ol {
  padding-left: 2em;
}
ul.no-list, ol.no-list {
  padding: 0;
  list-style-type: none;
}
ul ul, ul ol, ol ol, ol ul {
  margin-top: 0;
  margin-bottom: 0;
}
li > p {
  margin-top: 16px;
}
li + li {
  margin-top: 0.25em;;
}
ol li ul:first-of-type {
  margin-top: 0;
}
hr {
  background: transparent url(data:image/png;base64,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) repeat-x 0 0;
  border: 0 none;
  color: #ccc;
  height: 4px;
  margin: 16px 0;
  padding: 0;
}
h1 + p,
h2 + p,
h3 + p,
h4 + p,
h5 + p,
h6 + p,
ul li > :first-child,
ol li > :first-child {
  margin-top: 0;
}
dl {
  padding: 0;
}
dl dt {
  font-size: 1em;
  font-weight: bold;
  font-style: italic;
  padding: 0;
  margin: 15px 0 5px;
}
dl dt:first-child {
  padding: 0;
}
dl dt > :first-child {
  margin-top: 0;
}
dl dt > :last-child {
  margin-bottom: 0;
}
dl dd {
  margin: 0 0 15px;
  padding: 0 15px;
}
dl dd > :first-child {
  margin-top: 0;
}
dl dd > :last-child {
  margin-bottom: 0;
}
blockquote {
  border-left: 4px solid #DDD;
  padding: 0 15px;
  color: #777;
}
blockquote > :first-child {
  margin-top: 0;
}
blockquote > :last-child {
  margin-bottom: 0;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
  font-size: 100%;
  font: inherit;
}
table th {
  font-weight: bold;
  border: 1px solid #ccc;
  padding: 6px 13px;
}
table td {
  border: 1px solid #ccc;
  padding: 6px 13px;
}
table td > p:first-child {
  margin-top: 0;
}
table td > p:last-child {
  margin-bottom: 0;
}
table tr {
  border-top: 1px solid #ccc;
  background-color: #fff;
}
table tr:nth-child(2n) {
  background-color: #f8f8f8;
}
img {
  max-width: 100%;
}

/* Code
========================================================================== */

code, tt {
  padding: 0;
  padding-top: 0.2em;
  padding-bottom: 0.2em;
  margin: 0;
  font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  font-size: 10pt;
  background-color: rgba(0, 0, 0, 0.04);
  border-radius: 3px;
}
pre > code {
  margin: 0;
  padding: 0;
  white-space: pre;
  border: 0;
  background: transparent;
}
pre {
  padding: 16px;
  margin-top: 0;
  margin-bottom: 0;
  background-color: #f8f8f8;
  font-size: 10pt;
  line-height: 19px;
  overflow: auto;
  border-radius: 3px;
}
pre code, pre tt {
  background-color: transparent;
  border: 0;
}
code::before, code::after,
tt::before, tt::after {
  letter-spacing: -0.2em;
	content: "\00a0";
}
pre code::before, pre code::after, pre tt::before, pre tt::after {
	content: normal;
}
code > span.kw { color: #a71d5d; font-weight: normal; } /* Keyword */
code > span.dt { color: inherit; } /* DataType */
code > span.dv { color: #0086b3; } /* DecVal */
code > span.bn { color: #0086b3; } /* BaseN */
code > span.fl { color: #0086b3; } /* Float */
code > span.ch { color: #183691; } /* Char */
code > span.st { color: #183691; } /* String */
code > span.co { color: #969896; font-style: normal; } /* Comment */
code > span.ot { color: #a71d5d; } /* Other */
code > span.al { color: #ff0000; } /* Alert */
code > span.fu { color: #795da3; } /* Function */
code > span.er { color: #ff0000; font-weight: bold; } /* Error */
code > span.wa { color: #969896; font-weight: bold; font-style: italic; } /* Warning */
code > span.cn { color: #880000; } /* Constant */
code > span.sc { color: #183691; } /* SpecialChar */
code > span.vs { color: #183691; } /* VerbatimString */
code > span.ss { color: #bb6688; } /* SpecialString */
code > span.im { } /* Import */
code > span.va { color: #19177c; } /* Variable */
code > span.cf { color: #a71d5d; font-weight: normal; } /* ControlFlow */
code > span.op { color: #666666; } /* Operator */
code > span.bu { } /* BuiltIn */
code > span.ex { } /* Extension */
code > span.pp { color: #bc7a00; } /* Preprocessor */
code > span.at { color: #0086b3; } /* Attribute */
code > span.do { color: #ba2121; font-style: italic; } /* Documentation */
code > span.an { color: #969896; font-weight: bold; font-style: italic; } /* Annotation */
code > span.cv { color: #969896; font-weight: bold; font-style: italic; } /* CommentVar */
code > span.in { color: #969896; font-weight: bold; font-style: italic; } /* Information */

/* Print
========================================================================== */

@media print {
  body {
    background: #fff;
  }
  img, pre, blockquote, table, figure {
    page-break-inside: avoid;
  }
  body {
    background: #fff;
    border: 0;
  }
  code {
    background-color: #fff;
    color: #333!important;
    padding: 0 .2em;
    border: 1px solid #dedede;
  }
  pre {
    background: #fff;
  }
  pre code {
    background-color: white!important;
    overflow: visible;
  }
}

/* Selection
========================================================================== */

@media screen {
  ::selection {
    background: rgba(157, 193, 200, 0.5);
  }
  h1::selection {
    background-color: rgba(45, 156, 208, 0.3);
  }
  h2::selection {
    background-color: rgba(90, 182, 224, 0.3);
  }
  h3::selection, h4::selection, h5::selection, h6::selection, li::selection, ol::selection {
    background-color: rgba(133, 201, 232, 0.3);
  }
  code::selection {
    background-color: rgba(0, 0, 0, 0.7);
    color: #eee;
  }
  code span::selection {
    background-color: rgba(0, 0, 0, 0.7)!important;
    color: #eee!important;
  }
  a::selection {
    background-color: rgba(255, 230, 102, 0.2);
  }
  .inverted a::selection {
    background-color: rgba(255, 230, 102, 0.6);
  }
  td::selection, th::selection, caption::selection {
    background-color: rgba(180, 237, 95, 0.5);
  }
}

/* ToC
========================================================================== */

nav {
  margin-bottom: 5em;
}
