@charset "UTF-8";
/* You can override SASS variables here. */
:root {
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-500: #adb5bd;
  --color-link: #3045FF;
  --color-visited-link: #3045FF;
  --body-background: white;
  --body-font-color: #34405D;
  --icon-filter: none;
  --hint-color-info: #6bf;
  --hint-color-warning: #fd6;
  --hint-color-danger: #f66; }

/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */
/* Document
   ========================================================================== */
/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */
html {
  line-height: 1.15;
  /* 1 */
  -webkit-text-size-adjust: 100%;
  /* 2 */ }

/* Sections
   ========================================================================== */
/**
 * Remove the margin in all browsers.
 */
body {
  margin: 0; }

/**
 * Render the `main` element consistently in IE.
 */
main {
  display: block; }

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */
h1 {
  font-size: 2em;
  margin: 0.67em 0; }

/* Grouping content
   ========================================================================== */
/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */
hr {
  box-sizing: content-box;
  /* 1 */
  height: 0;
  /* 1 */
  overflow: visible;
  /* 2 */ }

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
pre {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */ }

/* Text-level semantics
   ========================================================================== */
/**
 * Remove the gray background on active links in IE 10.
 */
a {
  background-color: transparent; }

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */
abbr[title] {
  border-bottom: none;
  /* 1 */
  text-decoration: underline;
  /* 2 */
  text-decoration: underline dotted;
  /* 2 */ }

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */
b,
strong {
  font-weight: bolder; }

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
code,
kbd,
samp {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */ }

/**
 * Add the correct font size in all browsers.
 */
small {
  font-size: 80%; }

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

sub {
  bottom: -0.25em; }

sup {
  top: -0.5em; }

/* Embedded content
   ========================================================================== */
/**
 * Remove the border on images inside links in IE 10.
 */
img {
  border-style: none; }

/* Forms
   ========================================================================== */
/**
 * 1. Change the font styles in all browsers.
 * 2. Remove the margin in Firefox and Safari.
 */
button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  /* 1 */
  font-size: 100%;
  /* 1 */
  line-height: 1.15;
  /* 1 */
  margin: 0;
  /* 2 */ }

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */
button,
input {
  /* 1 */
  overflow: visible; }

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */
button,
select {
  /* 1 */
  text-transform: none; }

/**
 * Correct the inability to style clickable types in iOS and Safari.
 */
button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button; }

/**
 * Remove the inner border and padding in Firefox.
 */
button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0; }

/**
 * Restore the focus styles unset by the previous rule.
 */
button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText; }

/**
 * Correct the padding in Firefox.
 */
fieldset {
  padding: 0.35em 0.75em 0.625em; }

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */
legend {
  box-sizing: border-box;
  /* 1 */
  color: inherit;
  /* 2 */
  display: table;
  /* 1 */
  max-width: 100%;
  /* 1 */
  padding: 0;
  /* 3 */
  white-space: normal;
  /* 1 */ }

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */
progress {
  vertical-align: baseline; }

/**
 * Remove the default vertical scrollbar in IE 10+.
 */
textarea {
  overflow: auto; }

/**
 * 1. Add the correct box sizing in IE 10.
 * 2. Remove the padding in IE 10.
 */
[type="checkbox"],
[type="radio"] {
  box-sizing: border-box;
  /* 1 */
  padding: 0;
  /* 2 */ }

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */
[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto; }

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */
[type="search"] {
  -webkit-appearance: textfield;
  /* 1 */
  outline-offset: -2px;
  /* 2 */ }

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */
[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none; }

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */
::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* 1 */
  font: inherit;
  /* 2 */ }

/* Interactive
   ========================================================================== */
/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */
details {
  display: block; }

/*
 * Add the correct display in all browsers.
 */
summary {
  display: list-item; }

/* Misc
   ========================================================================== */
/**
 * Add the correct display in IE 10+.
 */
template {
  display: none; }

/**
 * Add the correct display in IE 10.
 */
[hidden] {
  display: none; }

.flex {
  display: flex; }

.flex-auto {
  flex: 1 1 auto; }

.flex-even {
  flex: 1 1; }

.flex-wrap {
  flex-wrap: wrap; }

.justify-start {
  justify-content: flex-start; }

.justify-end {
  justify-content: flex-end; }

.justify-center {
  justify-content: center; }

.justify-between {
  justify-content: space-between; }

.align-center {
  align-items: center; }

.mx-auto {
  margin: 0 auto; }

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

.text-left {
  text-align: left; }

.text-right {
  text-align: right; }

.hidden {
  display: none; }

input.toggle {
  height: 0;
  width: 0;
  overflow: hidden;
  opacity: 0;
  position: absolute; }

.clearfix::after {
  content: "";
  display: table;
  clear: both; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  touch-action: manipulation; }

body {
  min-width: 20rem;
  color: var(--body-font-color);
  background: var(--body-background);
  font-weight: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  box-sizing: border-box; }
  body * {
    box-sizing: inherit; }

h1,
h2,
h3,
h4,
h5 {
  font-weight: normal; }

a {
  text-decoration: none;
  color: var(--color-link); }

img {
  vertical-align: baseline; }

aside nav ul {
  padding: 0;
  margin: 0;
  list-style: none; }
  aside nav ul li {
    margin: 2px 0;
    position: relative; }
  aside nav ul a {
    display: block; }
  aside nav ul a:hover {
    opacity: 0.5; }

ul.pagination {
  display: flex;
  justify-content: center;
  list-style-type: none; }
  ul.pagination .page-item a {
    padding: 1rem; }

.container {
  max-width: 80rem;
  margin: 0 auto; }

.book-icon {
  filter: var(--icon-filter); }

.book-brand {
  margin-top: 0;
  margin-bottom: 1rem; }
  .book-brand img {
    height: 1.5em;
    width: 1.5em;
    margin-inline-end: 0.5rem; }

.book-menu {
  flex: 0 0 16rem;
  font-size: 0.875rem; }
  .book-menu .book-menu-content {
    width: 16rem;
    padding: 1rem;
    background: var(--body-background);
    position: fixed;
    top: 0;
    bottom: 0;
    overflow-x: hidden;
    overflow-y: auto; }
  .book-menu a,
  .book-menu label {
    color: inherit;
    cursor: pointer;
    word-wrap: break-word; }
  .book-menu a.active {
    color: var(--color-link); }
  .book-menu input.toggle + label + ul {
    display: none; }
  .book-menu input.toggle:checked + label + ul {
    display: block; }

body[dir="rtl"] .book-menu input.toggle + label::after {
  content: "◂"; }

body[dir="rtl"] .book-menu input.toggle:checked + label::after {
  content: "▾"; }

.book-section-flat {
  margin: 2rem 0; }
  .book-section-flat > a,
  .book-section-flat > span,
  .book-section-flat > label {
    font-weight: bolder; }
  .book-section-flat > ul {
    padding-inline-start: 0; }

.book-page {
  min-width: 20rem;
  flex-grow: 1; }

.book-post {
  margin-bottom: 3rem; }

.book-header {
  display: none;
  margin-bottom: 1rem; }
  .book-header label {
    line-height: 0; }
  .book-header img.book-icon {
    height: 1.5em;
    width: 1.5em; }

.book-search {
  position: relative;
  margin: 1rem 0;
  border-bottom: 1px solid transparent; }
  .book-search input {
    width: 100%;
    padding: 0.5rem;
    border: 0;
    border-radius: 0.25rem;
    background: var(--gray-100);
    color: var(--body-font-color); }
    .book-search input:required + .book-search-spinner {
      display: block; }
  .book-search .book-search-spinner {
    position: absolute;
    top: 0;
    margin: 0.5rem;
    margin-inline-start: calc(100% - 1.5rem);
    width: 1rem;
    height: 1rem;
    border: 1px solid transparent;
    border-top-color: var(--body-font-color);
    border-radius: 50%;
    animation: spin 1s ease infinite; }

@keyframes spin {
  100% {
    transform: rotate(360deg); } }
  .book-search small {
    opacity: 0.5; }

.book-toc {
  flex: 0 0 16rem;
  font-size: 0.75rem; }
  .book-toc .book-toc-content {
    width: 16rem;
    padding: 1rem; }
  .book-toc img {
    height: 1em;
    width: 1em; }
  .book-toc nav > ul > li:first-child {
    margin-top: 0; }

.book-footer {
  padding-top: 1rem;
  font-size: 0.875rem; }
  .book-footer img {
    height: 1em;
    width: 1em;
    margin-inline-end: 0.5rem; }

.book-comments {
  margin-top: 1rem; }

.book-languages {
  margin-block-end: 0;
  padding: 0 23px;
  margin-top: 20px; }
  .book-languages .book-icon {
    height: 1em;
    width: 1em;
    margin-inline-end: .5em; }
  .book-languages ul {
    padding-inline-start: 1.5em; }
    .book-languages ul li {
      line-height: 35px; }

.book-menu-content,
.book-toc-content,
.book-page,
.book-header aside,
.markdown {
  transition: 0.2s ease-in-out;
  transition-property: transform, margin, opacity, visibility;
  will-change: transform, margin, opacity; }

@media screen and (max-width: 56rem) {
  #menu-control,
  #toc-control {
    display: inline; }
  .book-menu {
    visibility: hidden;
    margin-inline-start: -16rem;
    font-size: 16px;
    z-index: 1; }
  .book-toc {
    display: none; }
  .book-header {
    display: block; }
  #menu-control:focus ~ main label[for="menu-control"] {
    outline-style: auto;
    outline-color: currentColor;
    outline-color: -webkit-focus-ring-color; }
  #menu-control:checked ~ main .book-menu {
    visibility: initial; }
  #menu-control:checked ~ main .book-menu .book-menu-content {
    padding: 1rem;
    transform: translateX(16rem);
    box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.1); }
  #menu-control:checked ~ main .book-page {
    opacity: 0.25; }
  #menu-control:checked ~ main .book-menu-overlay {
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0; }
  #toc-control:focus ~ main label[for="toc-control"] {
    outline-style: auto;
    outline-color: currentColor;
    outline-color: -webkit-focus-ring-color; }
  #toc-control:checked ~ main .book-header aside {
    display: block; }
  body[dir="rtl"] #menu-control:checked ~ main .book-menu .book-menu-content {
    transform: translateX(-16rem); } }

@media screen and (min-width: 80rem) {
  .book-page,
  .book-menu .book-menu-content,
  .book-toc .book-toc-content {
    padding: 2rem 1rem; } }

.modal-open {
  overflow: hidden; }

.modal {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1050;
  display: none;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
  outline: 0; }

.modal.fade .modal-dialog {
  -webkit-transform: translate(0, -25%);
  -ms-transform: translate(0, -25%);
  -o-transform: translate(0, -25%);
  transform: translate(0, -25%);
  -webkit-transition: -webkit-transform 0.3s ease-out;
  -o-transition: -o-transform 0.3s ease-out;
  transition: transform 0.3s ease-out; }

.modal.in .modal-dialog {
  -webkit-transform: translate(0, 0);
  -ms-transform: translate(0, 0);
  -o-transform: translate(0, 0);
  transform: translate(0, 0); }

.modal-open .modal {
  overflow-x: hidden;
  overflow-y: auto; }

.modal-dialog {
  position: relative;
  width: auto;
  margin: 10px; }

.modal-content {
  position: relative;
  background-color: transparent;
  outline: 0; }

.modal-backdrop {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1040;
  background-color: #000000; }

.modal-backdrop.fade {
  filter: alpha(opacity=0);
  opacity: 0; }

.modal-backdrop.in {
  filter: alpha(opacity=50);
  opacity: 0.5; }

.modal-header {
  padding: 15px 15px 0;
  text-align: right; }

.modal-header .close {
  margin-top: -2px; }

.modal-title {
  margin: 0;
  line-height: 1.42857143; }

.modal-body {
  position: relative;
  padding: 15px; }

.modal-footer {
  padding: 15px;
  text-align: right;
  border-top: 1px solid #e5e5e5; }

.modal-footer .btn + .btn {
  margin-bottom: 0;
  margin-left: 5px; }

.modal-footer .btn-group .btn + .btn {
  margin-left: -1px; }

.modal-footer .btn-block + .btn-block {
  margin-left: 0; }

.modal-scrollbar-measure {
  position: absolute;
  top: -9999px;
  width: 50px;
  height: 50px;
  overflow: scroll; }

@media (min-width: 768px) {
  .modal-dialog {
    width: 90%;
    margin: 30px auto; }
  .modal-sm {
    width: 300px; } }

@media (min-width: 992px) {
  .modal-lg {
    width: 900px; } }

.clearfix:before,
.clearfix:after,
.modal-header:before,
.modal-header:after,
.modal-footer:before,
.modal-footer:after {
  display: table;
  content: " "; }

.clearfix:after,
.modal-header:after,
.modal-footer:after {
  clear: both; }

.center-block {
  display: block;
  margin-right: auto;
  margin-left: auto; }

.pull-right {
  float: right !important; }

.pull-left {
  float: left !important; }

.hide {
  display: none !important; }

.show {
  display: block !important; }

.invisible {
  visibility: hidden; }

.text-hide {
  font: 0/0 a;
  color: transparent;
  text-shadow: none;
  background-color: transparent;
  border: 0; }

.close {
  color: white;
  font-size: 36px;
  font-weight: bold;
  margin-top: 10px;
  background: transparent;
  border: none;
  cursor: pointer; }

.hidden {
  display: none !important; }

.image-wrapper {
  text-align: center; }
  .image-wrapper img {
    max-width: 100%;
    margin: 0 auto;
    display: block; }

/* roboto-regular - latin */
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: local(""), url("fonts/roboto-v27-latin-regular.woff2") format("woff2"), url("fonts/roboto-v27-latin-regular.woff") format("woff");
  /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */ }

/* roboto-700 - latin */
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local(""), url("fonts/roboto-v27-latin-700.woff2") format("woff2"), url("fonts/roboto-v27-latin-700.woff") format("woff");
  /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */ }

/* roboto-mono-regular - latin */
@font-face {
  font-family: 'Roboto Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: local(""), url("fonts/roboto-mono-v13-latin-regular.woff2") format("woff2"), url("fonts/roboto-mono-v13-latin-regular.woff") format("woff");
  /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */ }

body {
  font-family: "Work Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol" !important; }

@media print {
  .book-menu,
  .book-footer,
  .book-toc {
    display: none; }
  .book-header,
  .book-header aside {
    display: block; }
  main {
    display: block !important; } }

/* You can override SASS variables here. */
.markdown {
  color: #222B38;
  font-size: 17px;
  line-height: 30px; }
  .markdown > :first-child {
    margin-top: 0; }
  .markdown h1,
  .markdown h2,
  .markdown h3,
  .markdown h4,
  .markdown h5,
  .markdown h6 {
    font-weight: normal;
    margin-top: .75em;
    margin-bottom: 0.5rem; }
    .markdown h1 a.anchor,
    .markdown h2 a.anchor,
    .markdown h3 a.anchor,
    .markdown h4 a.anchor,
    .markdown h5 a.anchor,
    .markdown h6 a.anchor {
      opacity: 0;
      font-size: 0.75em;
      vertical-align: middle;
      text-decoration: none; }
    .markdown h1:hover a.anchor,
    .markdown h1 a.anchor:focus,
    .markdown h2:hover a.anchor,
    .markdown h2 a.anchor:focus,
    .markdown h3:hover a.anchor,
    .markdown h3 a.anchor:focus,
    .markdown h4:hover a.anchor,
    .markdown h4 a.anchor:focus,
    .markdown h5:hover a.anchor,
    .markdown h5 a.anchor:focus,
    .markdown h6:hover a.anchor,
    .markdown h6 a.anchor:focus {
      opacity: initial; }
  .markdown p {
    margin-top: 8px;
    margin-bottom: 8px;
    line-height: 30px; }
  .markdown h4,
  .markdown h5,
  .markdown h6 {
    font-weight: bolder; }
  .markdown h2 {
    font-weight: 700;
    font-size: 25px;
    margin-bottom: 20px; }
  .markdown h3 {
    font-size: 20px;
    font-weight: 700; }
  .markdown h5 {
    font-size: 0.875em; }
  .markdown h6 {
    font-size: 0.75em; }
  .markdown b,
  .markdown optgroup,
  .markdown strong {
    font-weight: 700;
    font-size: 16px; }
  .markdown a {
    text-decoration: none; }
    .markdown a:hover {
      text-decoration: underline; }
    .markdown a:visited {
      color: var(--color-visited-link); }
  .markdown img {
    max-width: 100%;
    height: auto; }
  .markdown code {
    padding: 0 0.25rem;
    background: var(--gray-200);
    border-radius: 0.25rem;
    font-size: 0.875em; }
  .markdown pre {
    padding: 1rem;
    background: var(--gray-100);
    border-radius: 0.25rem;
    overflow-x: auto; }
    .markdown pre code {
      padding: 0;
      background: none; }
  .markdown blockquote {
    margin: 1rem 0;
    color: #818FAA;
    border-radius: 0.25rem;
    font-size: 17px; }
    .markdown blockquote :first-child {
      margin-top: 0; }
    .markdown blockquote :last-child {
      margin-bottom: 0; }
  .markdown table {
    overflow: auto;
    display: block;
    border-spacing: 0;
    border-collapse: collapse;
    margin-top: 1rem;
    margin-bottom: 1rem; }
    .markdown table tr th,
    .markdown table tr td {
      padding: 0.5rem 1rem;
      border: 1px solid var(--gray-200); }
    .markdown table tr:nth-child(2n) {
      background: var(--gray-100); }
  .markdown hr {
    height: 1px;
    border: none;
    background: var(--gray-200); }
  .markdown ul,
  .markdown ol {
    padding-inline-start: 28px;
    font-size: 17px;
    margin-bottom: 16px;
    margin-top: 8px;
    line-height: 30px; }
  .markdown dl dt {
    font-weight: bolder;
    margin-top: 1rem; }
  .markdown dl dd {
    margin-inline-start: 0;
    margin-bottom: 1rem; }
  .markdown .highlight table tr td:nth-child(1) pre {
    margin: 0;
    padding-inline-end: 0; }
  .markdown .highlight table tr td:nth-child(2) pre {
    margin: 0;
    padding-inline-start: 0; }
  .markdown details {
    padding: 1rem;
    border: 1px solid var(--gray-200);
    border-radius: 0.25rem; }
    .markdown details summary {
      line-height: 1;
      padding: 1rem;
      margin: -1rem;
      cursor: pointer; }
    .markdown details[open] summary {
      margin-bottom: 0; }
  .markdown figure {
    margin: 1rem 0; }
    .markdown figure figcaption p {
      margin-top: 0; }

.markdown-inner > :first-child {
  margin-top: 0; }

.markdown-inner > :last-child {
  margin-bottom: 0; }

.markdown .book-expand {
  margin-top: 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.25rem;
  overflow: hidden; }
  .markdown .book-expand .book-expand-head {
    background: var(--gray-100);
    padding: 0.5rem 1rem;
    cursor: pointer; }
  .markdown .book-expand .book-expand-content {
    display: none;
    padding: 1rem; }
  .markdown .book-expand input[type="checkbox"]:checked + .book-expand-content {
    display: block; }

.markdown .book-tabs {
  margin-top: 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.25rem;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap; }
  .markdown .book-tabs label {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-bottom: 1px transparent;
    cursor: pointer; }
  .markdown .book-tabs .book-tabs-content {
    order: 999;
    width: 100%;
    border-top: 1px solid var(--gray-100);
    padding: 1rem;
    display: none; }
  .markdown .book-tabs input[type="radio"]:checked + label {
    border-bottom: 1px solid var(--color-link); }
  .markdown .book-tabs input[type="radio"]:checked + label + .book-tabs-content {
    display: block; }
  .markdown .book-tabs input[type="radio"]:focus + label {
    outline-style: auto;
    outline-color: currentColor;
    outline-color: -webkit-focus-ring-color; }

.markdown .book-columns {
  margin-left: -1rem;
  margin-right: -1rem; }
  .markdown .book-columns > div {
    margin: 1rem 0;
    min-width: 10rem;
    padding: 0 1rem; }

.markdown a.book-btn {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-link);
  line-height: 2rem;
  padding: 0 1rem;
  border: 1px solid var(--color-link);
  border-radius: 0.25rem;
  cursor: pointer; }
  .markdown a.book-btn:hover {
    text-decoration: none; }

.markdown .book-hint.info {
  border-color: #6bf;
  background-color: rgba(102, 187, 255, 0.1); }

.markdown .book-hint.warning {
  border-color: #fd6;
  background-color: rgba(255, 221, 102, 0.1); }

.markdown .book-hint.danger {
  border-color: #f66;
  background-color: rgba(255, 102, 102, 0.1); }

/* You can add custom styles here. */
.img-responsive {
  max-width: 100%;
  display: inline-block;
  margin: auto;
  cursor: pointer; }

.markdown ol {
  list-style-position: inside;
  padding-left: 0; }

.input-search-wrapper {
  position: relative;
  background: #F5F8FF; }
  .input-search-wrapper input {
    background: transparent;
    height: 48px;
    border-radius: 4.76px;
    padding: 0;
    padding-left: 40px;
    font-size: 16px; }
    .input-search-wrapper input:focus {
      border: none;
      outline: 0; }
  .input-search-wrapper .search-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    text-align: center;
    display: flex;
    align-items: center; }

body {
  background-color: #FFF; }

.transition--300 {
  transition: all 300ms ease-in-out; }

.toc {
  height: 100%;
  width: 280px;
  transform: translateX(0); }

.content {
  position: relative; }

.content h1:first-child, .content h2:first-child {
  padding-top: 0;
  margin-top: 0; }

.title {
  font-size: 3em; }

.content {
  margin-bottom: 95vh; }

.content ul, .content ol {
  list-style: inherit; }

.content a {
  color: #0977c3;
  text-decoration: none;
  border-bottom: 1px solid #EEE;
  transition: all 300ms ease; }

.content a.no-decoration {
  border-bottom: 0; }

.content a:hover {
  border-bottom: 1px solid #0977c3; }

.content a:hover.no-decoration {
  border-bottom: 0; }

a.toc-link {
  text-decoration: none; }

.try-it-container {
  transform: translateY(84%); }

.try-it-container.is-open {
  transform: translateY(0%); }

.page-content {
  display: block !important; }

.hljs {
  display: block;
  background: white;
  padding: 0.5em;
  color: #333333;
  overflow-x: auto; }

.hljs-comment, .hljs-meta {
  color: #969896; }

.hljs-string, .hljs-variable, .hljs-template-variable, .hljs-strong, .hljs-emphasis, .hljs-quote {
  color: #df5000; }

.hljs-keyword, .hljs-selector-tag, .hljs-type {
  color: #a71d5d; }

.hljs-literal, .hljs-symbol, .hljs-bullet, .hljs-attribute {
  color: #0086b3; }

.hljs-section, .hljs-name {
  color: #63a35c; }

.hljs-tag {
  color: #333333; }

.hljs-title, .hljs-attr, .hljs-selector-id, .hljs-selector-class, .hljs-selector-attr, .hljs-selector-pseudo {
  color: #795da3; }

.hljs-addition {
  color: #55a532;
  background-color: #eaffea; }

.hljs-deletion {
  color: #bd2c00;
  background-color: #ffecec; }

.hljs-link {
  text-decoration: underline; }

.toc-icon {
  position: fixed;
  top: 0;
  right: 0; }

#toc:checked ~ .toc {
  box-shadow: 0 0 5px #c8c8c8;
  transform: translateX(0); }

.toc {
  background-color: rgba(255, 255, 255, 0.9);
  transform: translateX(-100%); }

.toc.toc-right {
  transform: translateX(100%);
  right: 0; }

@media (min-width: 52em) {
  .toc {
    transform: translateX(0); }
  .toc.toc-right {
    transform: translateX(0);
    right: calc((100% - 48rem - 4rem) / 2); }
  .toc-icon {
    display: none; }
  .try-it-container {
    display: block; }
  .content {
    margin-left: 280px; }
  .toc-right ~ .content {
    margin-left: 0;
    margin-right: 280px; } }

* {
  box-sizing: border-box; }

body {
  font-size: 1.2rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif; }

h1, h2, h3, h4, h5, h6 {
  padding-top: 0.5em; }

h1:focus, h2:focus, h3:focus, h4:focus, h5:focus, h6:focus {
  outline: 0; }

p {
  margin-top: 0.25rem; }

pre {
  display: block;
  background: #f7f7f7;
  border-radius: 2px;
  border: 1px solid #e0e0e0;
  padding: 2px;
  line-height: 1.2;
  margin-bottom: 10px;
  overflow: auto;
  white-space: pre-wrap; }

code {
  display: inline;
  font-size: .8em;
  max-width: 100%; }

.toc {
  overflow-y: auto; }

.toc > .toc-list {
  overflow: hidden;
  position: relative; }

.toc > .toc-list li {
  list-style: none; }

.toc-list {
  margin: 0;
  padding-left: 10px; }

a.toc-link {
  color: currentColor;
  height: 100%; }

.is-collapsible {
  max-height: 1000px;
  overflow: hidden;
  transition: all 300ms ease-in-out; }

.is-collapsed {
  max-height: 0; }

.is-position-fixed {
  position: fixed !important;
  top: 0; }

.is-active-link {
  font-weight: 700; }

.toc-link::before {
  background-color: #EEE;
  content: ' ';
  display: inline-block;
  height: inherit;
  left: 0;
  margin-top: -1px;
  position: absolute;
  width: 2px; }

.is-active-link::before {
  background-color: #54BC4B; }

section {
  position: relative; }

.book-section-flat > a {
  text-transform: uppercase; }
  .book-section-flat > a:hover {
    color: inherit; }

.book-section-flat span {
  text-transform: uppercase;
  font-weight: 600;
  font-size: 16px;
  color: #222B38;
  line-height: 25px; }

.nav-list .nav-section {
  text-transform: uppercase; }

.book-menu a.active {
  background: #E9EFFF;
  display: block;
  color: #3045FF;
  border-right: 2px solid #3045FF; }

.book-menu .nav-list a {
  line-height: 26px;
  padding: 7px 22px;
  width: 100%; }

.book-section-flat {
  margin: 15px 0px 5px; }
  .book-section-flat span {
    padding: 0 10px 0 23px;
    margin-bottom: 7px;
    display: inline-block; }

.book-menu .book-menu-content {
  padding: 0;
  position: relative;
  width: 17rem; }
  .book-menu .book-menu-content::-webkit-scrollbar {
    width: 0.5rem; }
  .book-menu .book-menu-content::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 0.5rem; }

#menu-control:checked ~ main .book-menu .book-menu-content {
  padding: 0; }

.book-menu {
  font-size: 16px;
  margin-top: 10px; }
  .book-menu input.toggle + label::after {
    display: flex;
    align-items: center; }

.book-page {
  margin-top: 26px; }

@media screen and (min-width: 56rem) {
  .book-menu {
    margin-left: -23px; }
  .book-menu nav {
    border-right: 1px solid #E9EFFF; }
  .book-page {
    padding: 0 36px; }
  .book-menu .book-menu-content,
  .book-toc .book-toc-content {
    padding: 26px 0; } }

.toc .toc-title {
  font-weight: 600;
  font-size: 16px;
  line-height: 25px;
  color: #222B38;
  margin-bottom: 12px;
  display: inline-block; }

.toc li {
  margin: 0;
  font-size: 14px;
  line-height: 26px;
  padding: 2px 15px; }

.toc-list {
  overflow: hidden;
  position: relative;
  border: 0; }

.wrapper {
  width: 100%;
  max-width: 1200px;
  padding: 0 15px;
  margin-left: auto;
  margin-right: auto; }

.section-top-signup {
  background: #34405D;
  color: #fff;
  padding-top: 112px;
  padding-bottom: 95px; }
  .section-top-signup .wrapper {
    display: flex;
    justify-content: space-between; }
  .section-top-signup .signup-content {
    padding-top: 127px;
    width: 50%; }
  .section-top-signup .signup-title {
    font-size: 48px;
    font-weight: bold;
    letter-spacing: -0.02em; }
  .section-top-signup .signup-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 248px;
    height: 63px;
    border-radius: 6px;
    background: #3045FF;
    color: #fff;
    font-size: 22px;
    font-weight: 600;
    margin-top: 25px;
    margin-bottom: 35px; }
  .section-top-signup .signup-text {
    font-size: 20px; }
  .section-top-signup .signup-img {
    padding-top: 45px;
    padding-right: 4px; }
    .section-top-signup .signup-img img {
      max-width: 422px; }

footer {
  padding-top: 60px;
  position: relative;
  background-color: #fff; }
  footer ul {
    list-style-type: none;
    padding-left: 0; }
  footer .list-items {
    margin-top: 0;
    padding-bottom: 30px; }
  footer .wrapper {
    display: flex; }
  footer .footer-infor {
    flex: 1; }
  footer .list-items {
    display: flex;
    justify-content: space-between;
    flex: 3; }
  footer .footer-logo {
    display: block;
    width: 97px; }
  footer .list-social {
    display: flex;
    margin-top: 35px; }
  footer .link-social {
    display: block;
    background-size: cover;
    width: 31px;
    height: 31px;
    margin-right: 30px; }
    footer .link-social.is-facebook {
      background-image: url("svg/ico-facebook.svg"); }
    footer .link-social.is-twitter {
      background-image: url("svg/ico-twitter.svg"); }
    footer .link-social.is-linkedin {
      background-image: url("svg/ico-linkedin.svg"); }
  footer .item-social:last-child .link-social {
    margin-right: 0; }
  footer .item-title {
    margin-top: 0;
    font-size: 20px;
    font-weight: 500;
    color: #222B38;
    margin-bottom: 32px;
    line-height: 1.3; }
  footer .link {
    display: inline-block;
    font-size: 18px;
    color: #818FAA;
    margin-bottom: 16px;
    transition: color .15s; }
    footer .link:hover {
      color: #3045FF; }
  footer .footer-copyright {
    display: block;
    width: 100%;
    color: #818FAA;
    background: #E9EFFF;
    padding: 20px 0; }

@media (max-width: 1023px) {
  footer .wrapper {
    display: block; }
  footer .footer-logo {
    width: 77px; }
  footer .list-social {
    margin-top: 33px; }
  footer .link-social {
    width: 27px;
    height: 27px;
    margin-right: 26px; }
  footer .list-items {
    flex-wrap: wrap;
    justify-content: space-between;
    margin-top: 39px;
    padding-right: 0; }
  footer .item {
    width: auto; }
  footer .item-sm {
    margin-top: 20px; }
  footer .item-title {
    font-size: 18px;
    margin-bottom: 35px; }
  footer .link {
    font-size: 16px;
    margin-bottom: 17px; }
  footer .footer-copyright {
    font-size: 14px;
    font-weight: 600; }
  .section-top-signup {
    padding-top: 0;
    padding-bottom: 17px; }
    .section-top-signup .wrapper {
      display: block; }
    .section-top-signup .signup-content {
      padding-top: 73px;
      width: 100%; }
    .section-top-signup .signup-title {
      font-size: 28px;
      text-align: center; }
    .section-top-signup .signup-button {
      margin: 24px auto;
      width: 198px;
      height: 50px;
      font-size: 17px; }
    .section-top-signup .signup-text {
      font-size: 16px;
      text-align: center;
      width: 75%;
      margin: 0 auto; }
    .section-top-signup .signup-img {
      padding: 0;
      margin: 56px auto;
      width: 87%; }
      .section-top-signup .signup-img img {
        max-width: 100%; } }

.toc-list {
  list-style: none; }

.toc-link {
  line-height: 19px;
  display: block;
  transition: color 0.2s; }
  .toc-link:hover {
    color: var(--color-link); }
  P .toc-link::before {
    background-color: #E9EFFF; }

.toc-list-item {
  font-size: 14px;
  line-height: 25px;
  padding: 6px 15px; }
  .toc-list-item .is-active-link::before {
    background-color: #3045FF; }

@media screen and (min-width: 1024px) {
  .lg-hidden {
    display: none; } }

.menu-toc {
  visibility: hidden; }

.breadcrumb {
  list-style-type: none;
  color: var(--color-link);
  padding-left: 0;
  margin: 0;
  margin-bottom: 10px; }
  .breadcrumb li {
    display: inline-block;
    font-size: 16px;
    line-height: 32px;
    transition: opacity .3s;
    padding-left: 20px;
    position: relative; }
    .breadcrumb li:first-child {
      padding-left: 0; }
      .breadcrumb li:first-child:before {
        content: ''; }
    .breadcrumb li:before {
      content: '>';
      position: absolute;
      left: 2px; }
    .breadcrumb li:hover {
      opacity: .8; }

.toggle-icon {
  transition: all .15s;
  width: 9px;
  height: 4px;
  margin-right: 23px;
  position: absolute;
  right: 0; }
  .toggle-icon.active {
    transform: rotate(180deg); }

.input-search-wrapper {
  border-radius: 5px; }

#book-search-input::placeholder {
  color: #818FAA; }

.book-search {
  margin: 0 23px; }

aside nav ul a {
  transition: color 0.2s linear; }
  aside nav ul a:hover {
    color: var(--color-link);
    opacity: 1; }

.img-margin {
  margin-top: 12px;
  margin-bottom: 24px; }

.book-collapse-menu > ul {
  padding-left: 1rem; }

.book-page article iframe {
  max-width: 100%; }

@media (max-width: 767px) {
  footer .item {
    width: 50%; } }

.header {
  background: #fff;
  box-shadow: 0px 5px 10px rgba(100, 121, 247, 0.1); }
  .header ul {
    padding: 0;
    margin: 0;
    list-style: none; }
  .header .wrapper {
    display: flex;
    align-items: flex-start; }
  .header .header-logo a {
    display: block;
    margin-top: 26px; }
  .header .header-navigation {
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    margin-left: 66px; }
  .header .list-navbar {
    display: flex;
    align-items: center; }
    .header .list-navbar a {
      display: block;
      font-size: 16px;
      color: #1B1B1B;
      line-height: 2.2;
      margin-right: 30px;
      transition: color .15s; }
      @media (min-width: 1200px) {
        .header .list-navbar a {
          margin-right: 49px; } }
      .header .list-navbar a:hover {
        color: #3045FF; }
    .header .list-navbar.is-right .is-blue {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 188px;
      height: 48px;
      font-weight: 600;
      font-size: 16px;
      background: #3045FF;
      border-radius: 5px;
      color: #fff;
      margin: 0; }

@media (max-width: 1023px) {
  header.header {
    position: relative; }
    header.header .header-logo a {
      margin: 26px 0; }
    header.header .button-menu {
      position: absolute;
      right: 17px;
      top: 22px; }
    header.header .header-navigation {
      display: block;
      transform: translateX(100%);
      width: 80%;
      position: fixed;
      top: 0;
      right: 0;
      z-index: 99;
      min-height: 100vh;
      background: #fff;
      margin: 0;
      padding: 69px 0 0;
      transition: all .3s;
      background: #34405D; }
    header.header.is-active .header-navigation {
      transform: translateX(0);
      transition: all .3s; }
    header.header .list-navbar.is-left,
    header.header .list-navbar.is-right {
      display: block;
      text-align: center; }
      header.header .list-navbar.is-left li,
      header.header .list-navbar.is-right li {
        padding: 0 20px; }
      header.header .list-navbar.is-left a,
      header.header .list-navbar.is-right a {
        font-size: 18px;
        margin: 0 auto;
        text-align: left;
        padding: 11px 14px;
        color: #fff;
        border-bottom: 1px solid #465373; }
      header.header .list-navbar.is-left .is-blue,
      header.header .list-navbar.is-left .is-login,
      header.header .list-navbar.is-right .is-blue,
      header.header .list-navbar.is-right .is-login {
        display: inline-flex;
        width: 240px;
        height: 48px;
        border-radius: 5px;
        border: 1px solid #fff;
        font-size: 16px;
        font-weight: 600;
        justify-content: center;
        align-items: center;
        margin: 10px auto;
        text-transform: uppercase; }
      header.header .list-navbar.is-left .is-login,
      header.header .list-navbar.is-right .is-login {
        margin-top: 24px; } }