@charset "UTF-8"; /*!normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css*/
html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}
details,
main {
  display: block;
}
h1 {
  font-size: 2em;
  margin: 0.67em 0;
}
hr {
  box-sizing: content-box;
  height: 0;
  overflow: visible;
}
code,
kbd,
pre,
samp {
  font-family: monospace, monospace;
  font-size: 1em;
}
a {
  background-color: transparent;
  text-decoration: none;
  color: #05b;
}
abbr[title] {
  border-bottom: none;
  text-decoration: underline;
  text-decoration: underline dotted;
}
b,
strong {
  font-weight: bolder;
}
small {
  font-size: 80%;
}
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}
sub {
  bottom: -0.25em;
}
sup {
  top: -0.5em;
}
img {
  border-style: none;
  vertical-align: baseline;
}
button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}
button,
input {
  overflow: visible;
}
button,
select {
  text-transform: none;
}
[type="button"],
[type="reset"],
[type="submit"],
button {
  -webkit-appearance: button;
}
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner,
button::-moz-focus-inner {
  border-style: none;
  padding: 0;
}
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring,
button:-moz-focusring {
  outline: ButtonText dotted 1px;
}
fieldset {
  padding: 0.35em 0.75em 0.625em;
}
legend {
  box-sizing: border-box;
  color: inherit;
  display: table;
  max-width: 100%;
  padding: 0;
  white-space: normal;
}
progress {
  vertical-align: baseline;
}
textarea {
  overflow: auto;
}
[type="checkbox"],
[type="radio"] {
  box-sizing: border-box;
  padding: 0;
}
[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto;
}
[type="search"] {
  -webkit-appearance: textfield;
  outline-offset: -2px;
}
[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}
::-webkit-file-upload-button {
  -webkit-appearance: button;
  font: inherit;
}
summary {
  display: list-item;
}
[hidden],
template {
  display: none;
}
.flex {
  display: flex;
}
.flex-auto {
  flex: 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;
}
.hidden {
  display: none;
}
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}
html {
  font-size: 16px;
  letter-spacing: 0.33px;
  scroll-behavior: smooth;
  touch-action: manipulation;
}
body,
html {
  min-width: 20rem;
  overflow-x: hidden;
}
body {
  margin: 0;
  color: #000;
  background: #fff;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  box-sizing: border-box;
  font-family: roboto, sans-serif;
}
body * {
  box-sizing: inherit;
}
h1,
h2,
h3,
h4,
h5 {
  font-weight: 400;
}
a:visited {
  color: #8440f1;
}
aside nav ul {
  padding: 0;
  margin: 0;
  list-style: none;
}
aside nav ul li {
  margin: 1em 0;
  position: relative;
}
aside nav ul a {
  display: block;
}
aside nav ul a:hover {
  opacity: 0.5;
}
aside nav ul ul {
  padding-left: 1rem;
}
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: none;
}
.book-menu-sticky {
  position: sticky;
  top: 0;
  z-index: 10;
  padding-bottom: 0.75rem;
  background: #fff;
  box-shadow: 0 1px 0 #e5e7eb;
}
.book-menu-sticky::before {
  position: absolute;
  right: -1rem;
  bottom: 100%;
  left: -1rem;
  height: 1rem;
  background: #fff;
  content: "";
}
.book-brand {
  margin-top: 0;
  padding: 1rem 0;
  margin-bottom: 0;
}
.book-brand img {
  height: 1.5em;
  width: auto;
  vertical-align: middle;
  margin-right: 0.5rem;
}
.book-menu {
  flex: 0 0 16rem;
  font-size: 0.875rem;
}
.book-menu nav {
  width: 16rem;
  padding: 1rem;
  position: fixed;
  top: 0;
  bottom: 0;
  overflow-x: hidden;
  overflow-y: auto;
}
.book-menu a {
  color: inherit;
  word-wrap: break-word;
}
.book-menu a.active {
  color: #05b;
}
.book-menu a.collapsed::after {
  content: "▸";
  position: absolute;
  right: 0;
}
.book-section-flat {
  margin-bottom: 2rem;
}
.book-section-flat:not(:first-child) {
  margin-top: 2rem;
}
.book-section-flat > a,
.book-section-flat > span {
  font-weight: bolder;
}
.book-section-flat > ul {
  padding-left: 0;
}
.book-page {
  min-width: 20rem;
  flex-grow: 1;
  padding: 1rem;
}
.book-post {
  margin-bottom: 3rem;
}
.book-header {
  display: none;
  margin-bottom: 1rem;
}
.book-header label {
  line-height: 0;
}
.book-search {
  position: relative;
  margin: 0.5rem 0 0;
  border-bottom: 1px solid transparent;
}
.book-search::after {
  display: block;
  content: "";
  clear: both;
}
.book-search input {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.625rem 3.25rem 0.625rem 2.75rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  background-color: #fff;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  background-position: 0.875rem center;
  background-repeat: no-repeat;
  color: #000;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}
.book-search input::placeholder {
  color: #6b7280;
  opacity: 1;
}
.book-search input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}
.book-search-clear {
  position: absolute;
  top: 0.375rem;
  right: 0.375rem;
  z-index: 2;
  display: flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 0.375rem;
  background: transparent;
  color: #64748b;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
}
.book-search input:placeholder-shown ~ .book-search-clear {
  display: none;
}
.book-search-clear:hover {
  background: #f1f5f9;
  color: #334155;
}
.book-search-label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
}
.book-search input:focus {
  box-shadow: none;
  outline: 0;
}
#book-search-results {
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
}
#book-search-results li {
  margin: 0;
}
#book-search-results .book-search-empty,
#book-search-results a {
  display: block;
  padding: 0.5rem;
  border-radius: 0.25rem;
}
#book-search-results a:focus,
#book-search-results a:hover {
  background: #f1f5f9;
}
#book-search-results .book-search-empty {
  color: #6b7280;
}
.book-search input:required + .book-search-spinner {
  display: block;
}
.book-search .book-search-spinner {
  position: absolute;
  margin: 0.5rem;
  right: 0;
  top: 0;
  width: 1rem;
  height: 1rem;
  border: 1px solid transparent;
  border-top-color: #000;
  border-radius: 50%;
  animation: 1s infinite spin;
}
@keyframes spin {
  100% {
    transform: rotate(360deg);
  }
}
.book-toc {
  flex: 0 0 16rem;
  font-size: 0.75rem;
}
.book-toc nav {
  width: 16rem;
  padding: 1rem;
  position: fixed;
  top: 0;
  bottom: 0;
  overflow-x: hidden;
  overflow-y: auto;
}
.book-toc img {
  height: 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;
  margin-right: 0.5rem;
}
.book-comments {
  margin-top: 1rem;
}
.book-languages {
  position: relative;
  overflow: visible;
  padding: 1rem;
  margin: -1rem;
}
.book-languages ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.book-languages ul li {
  white-space: nowrap;
  cursor: pointer;
}
.book-languages:focus .book-languages-list,
.book-languages:focus-within .book-languages-list,
.book-languages:hover .book-languages-list {
  display: block;
}
.book-languages .book-languages-list {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 0;
  padding: 0.5rem 0;
  background: #fff;
  box-shadow: 0 0 0.25rem rgba(0, 0, 0, 0.1);
}
.book-languages .book-languages-list li img {
  opacity: 0.25;
}
.book-languages .book-languages-list li.active img,
.book-languages .book-languages-list li:hover img {
  opacity: 1;
}
.book-languages .book-languages-list a {
  color: inherit;
  padding: 0.5rem 1rem;
}
.book-home {
  padding: 1rem;
}
.book-header aside,
.book-page,
.markdown,
aside nav {
  transition: 0.2s ease-in-out;
  transition-property: transform, margin, opacity;
  will-change: transform, margin;
}
@media screen and (max-width: 56rem) {
  .book-menu {
    flex-basis: 0;
    margin-left: 0;
    font-size: 16px;
  }
  .book-menu nav {
    width: min(20rem, 86vw);
    padding: 0 1rem 1rem;
    z-index: 1001;
    background: #fff;
    box-shadow: 0 0 1rem rgba(0, 0, 0, 0.2);
    transform: translateX(-100%);
  }
  .book-toc {
    display: none;
  }
  .book-header {
    display: block;
  }
  #menu-control:checked + main .book-menu nav {
    transform: translateX(0);
  }
  #menu-control:checked + main .book-menu-overlay {
    display: block;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.25);
  }
  #toc-control:checked + aside {
    display: block;
  }
}
@media screen and (min-width: 80rem) {
  .book-menu-sticky::before {
    height: 2rem;
  }
  .book-menu nav,
  .book-page,
  .book-toc nav {
    padding: 2rem 1rem;
  }
}
@font-face {
  font-family: roboto;
  font-style: italic;
  font-weight: 300;
  font-display: swap;
  src:
    local("Roboto Light Italic"),
    local("Roboto-LightItalic"),
    url(fonts/roboto-v19-latin-300italic.woff2) format("woff2"),
    url(fonts/roboto-v19-latin-300italic.woff) format("woff");
}
@font-face {
  font-family: roboto;
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src:
    local("Roboto"),
    local("Roboto-Regular"),
    url(fonts/roboto-v19-latin-regular.woff2) format("woff2"),
    url(fonts/roboto-v19-latin-regular.woff) format("woff");
}
@font-face {
  font-family: roboto;
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src:
    local("Roboto Bold"),
    local("Roboto-Bold"),
    url(fonts/roboto-v19-latin-700.woff2) format("woff2"),
    url(fonts/roboto-v19-latin-700.woff) format("woff");
}
@font-face {
  font-family: roboto mono;
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src:
    local("Roboto Mono"),
    local("RobotoMono-Regular"),
    url(fonts/roboto-mono-v6-latin-regular.woff2) format("woff2"),
    url(fonts/roboto-mono-v6-latin-regular.woff) format("woff");
}
code {
  font-family:
    roboto mono,
    monospace;
}
@media print {
  .book-footer,
  .book-menu,
  .book-toc {
    display: none;
  }
  .book-header,
  .book-header aside {
    display: block;
  }
  main {
    display: block !important;
  }
}
.markdown {
  line-height: 1.6em;
}
.markdown > :first-child {
  margin-top: 0;
}
.markdown h1,
.markdown h2,
.markdown h3,
.markdown h4,
.markdown h5,
.markdown h6 {
  font-weight: 400;
  line-height: 1em;
  margin-top: 1.5em;
  margin-bottom: 1rem;
}
.markdown h4,
.markdown h5,
.markdown h6 {
  font-weight: bolder;
}
.markdown h5 {
  font-size: 0.875em;
}
.markdown h6 {
  font-size: 0.75em;
}
.markdown b,
.markdown optgroup,
.markdown strong {
  font-weight: bolder;
}
.markdown a {
  text-decoration: none;
}
.markdown a:hover {
  text-decoration: underline;
}
.markdown code {
  padding: 0 0.25rem;
  background: #e9ecef;
  border-radius: 0.25rem;
  font-size: 0.875em;
}
.markdown pre {
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 0.25rem;
  overflow-x: auto;
}
.markdown pre code {
  padding: 0;
  background: 0 0;
}
.markdown blockquote {
  margin: 1rem 0;
  padding: 0.5rem 1rem 0.5rem 0.75rem;
  border-radius: 0.25rem;
}
.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 td,
.markdown table tr th {
  padding: 0.5rem 1rem;
  border: 1px solid #e9ecef;
}
.markdown table tr:nth-child(2n) {
  background: #f8f9fa;
}
.markdown hr {
  height: 1px;
  border: none;
  background: #e9ecef;
}
.markdown ol,
.markdown ul {
  padding-left: 2rem;
}
.markdown dl dt {
  font-weight: bolder;
  margin-top: 1rem;
}
.markdown dl dd {
  margin-left: 2rem;
}
.markdown .highlight table tr td:first-child pre {
  margin: 0;
  padding-right: 0;
}
.markdown .highlight table tr td:nth-child(2) pre {
  margin: 0;
  padding-left: 0;
}
.markdown details {
  padding: 1rem;
  border: 1px solid #e9ecef;
  border-radius: 0.25rem;
}
.markdown details summary {
  line-height: 1;
  cursor: pointer;
}
.markdown-inner > :first-child {
  margin-top: 0;
}
.markdown-inner > :last-child {
  margin-bottom: 0;
}
.book-expand {
  margin-top: 1rem;
  margin-bottom: 1rem;
  border: 1px solid #e9ecef;
  border-radius: 0.25rem;
  overflow: hidden;
}
.book-expand .book-expand-head {
  background: #f8f9fa;
  padding: 0.5rem 1rem;
  cursor: pointer;
}
.book-expand .book-expand-content {
  display: none;
  padding: 1rem;
}
.book-expand input[type="checkbox"]:checked + .book-expand-content {
  display: block;
}
.book-tabs {
  margin-top: 1rem;
  margin-bottom: 1rem;
  border: 1px solid #e9ecef;
  border-radius: 0.25rem;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap;
}
.book-tabs label {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-bottom: 1px transparent;
  cursor: pointer;
}
.book-tabs .book-tabs-content {
  order: 999;
  width: 100%;
  border-top: 1px solid #f8f9fa;
  padding: 1rem;
  display: none;
}
.book-tabs input[type="radio"]:checked + label {
  border-bottom: 1px solid #05b;
}
.book-tabs input[type="radio"]:checked + label + .book-tabs-content {
  display: block;
}
.book-columns {
  margin-left: -1rem;
  margin-right: -1rem;
}
.book-columns > div {
  margin: 1rem 0;
  min-width: 10rem;
  padding: 0 1rem;
}
a.book-btn {
  display: inline-block;
  font-size: 0.875rem;
  color: #05b;
  line-height: 2rem;
  padding: 0 1rem;
  border: 1px solid #05b;
  border-radius: 0.25rem;
  cursor: pointer;
}
a.book-btn:hover {
  text-decoration: none;
}
.book-hint.info {
  border-left-color: #6bf;
  background-color: rgba(102, 187, 255, 0.1);
}
.book-hint.warning {
  border-left-color: #fd6;
  background-color: rgba(255, 221, 102, 0.1);
}
.book-hint.danger {
  border-left-color: #f66;
  background-color: rgba(255, 102, 102, 0.1);
}
.markdown img {
  max-width: 375px;
  height: auto;
  border: 2px solid #f8f8f8;
  border-radius: 20px;
}
.my-pagging {
  padding: 10px 20px;
  overflow: hidden;
  margin-top: 40px;
  background: #f8f8f8;
  color: #666;
  font-size: 14px;
}
.my-pagging a,
.my-pagging a:visited {
  color: #05b;
}
.my-pagging .left-half,
.my-pagging .right-half {
  float: left;
  width: 50%;
}
.my-pagging .right-half {
  text-align: right;
}
.my-pagging:has(.left-half:empty) .right-half,
.my-pagging:has(.right-half:empty) .left-half {
  float: none;
  width: 100%;
}
.markdown a,
.markdown a:visited {
  color: #05b;
}
a:visited {
  color: inherit;
}
ul > li > ul > li {
  line-height: 180%;
}
.markdown ul li {
  line-height: 200%;
}
.markdown blockquote {
  border-left: 0.25rem solid #ffcf00;
  background: #fff5cb;
}
@media screen and (max-width: 768px) {
  .markdown img {
    max-width: 100%;
  }
  .book-header {
    position: fixed;
    top: 0;
    left: 0;
    padding: 10px 20px;
    background: #fff;
    z-index: 999;
    width: 100%;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 5%);
  }
  .book-header label[for="toc-control"] {
    visibility: hidden;
  }
  .book-page {
    will-change: scroll-position;
    padding: 20px 20px 0;
  }
  article.markdown {
    padding-top: 40px;
  }
}