html,
body {
  margin: auto;
  padding: 0;
  position: relative;
}

body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -moz-font-feature-settings: "liga" on;
  image-rendering: -webkit-optimize-contrast;
} 

/* Two columns */
div.splitbox {
  width:100%; 
  border-top: .15rem solid #757575;
  padding: 1rem; 
  margin-top: -1rem;
  margin-bottom: 1em;
}

div.splitbox div.left {
               width:35%;
               float:left;
               color: gray;
}

div.splitbox div.right {
               width:64%;
               float:right;}

@media only screen and (max-width: 600px) {
div.splitbox div.left {
               width:100%;
               float:left;}
div.splitbox div.right {
               width:100%;
               float:left;}
}

#top {
  position: fixed;
  right: 0;
  z-index: 1;
}

.fullwidth {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

/*Stylying footer text*/

.footer { 
  text-align: center; font-size: 19px;
  padding: 30px 0;
} 

.footer-links {
  list-style: none;
  margin-top: -14px;
  padding: 0;
  color: #ccc;
  font-size: 14px;
}

.footer-links li {
  margin: 0;
  padding: 0;
  display: inline-block;
}

.footer-links a {
  color: #888;
  text-decoration: none;
  transition: color 150ms ease;
  margin: 0 15px;
}

.footer-links a:hover,
.footer-links a:focus {
  color: #222;
}

.footer-links li::before {
  content: '/';
  position: relative;
  left: -2px;
}

.footer-links li:first-child::before {
  display: none;
}
.footer-links-kudos img {
  margin-left: 2px;
}

.copyright-text {
  margin-top: 10px;
  margin-bottom: -5px;
  color: grey;
}

/* navigation bar positioning */
.nav {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 15px;
  text-align: right;
}

.nav-logo {
  float: left;
  margin-top: -11px;
  transition: transform 150ms ease-out;
}

.nav-logo:hover {
  transform: scale(1.1);
}

.nav-logo img {
  display: block;
  max-height: 40px;
  width: auto;
  border-radius: 50%;
}

.nav-links {
  margin: 0;
  padding: 0;
  font-size: 14px;
  list-style: none;
}

.nav-links li {
  display: inline-block;
  margin: 0 0 0 15px;
}

.nav-links li:first-child {
  margin-left: 0;
}

.nav-links a {
  text-decoration: none;
  color: #111;
}

.nav-links a:hover {
  color: #000;
}

/*The parameter of `max-width` below controls the width of the body text. 
Customize as you prefer*/
.content {
  max-width: 750px; 
  margin: 60px auto auto auto;
  padding: 0 15px;
  font-size: 19px;
  line-height: 1.7;
}

.wrapper {
  overflow: hidden;
  position: relative;
}

.header {
  padding: 20px 0;
  position: relative;
  background: #f5f5f5;
  border-bottom: 1px solid #eaeaea;
}

.header-anchor:hover,
.header-anchor:focus {
  background-color: gray;
}

.title {
  font-size: 1.1em; }

.article-toolbar a {
  margin-bottom: 2px;
  margin-left: .2em;
}

.article-toolbar a:hover, .article-toolbar a:focus {
  color: #222;
}

pre {
  border: 1px solid #cccccc; 
  /*#757575*/
}

pre code {
  background-color: transparent;
  border: none;
}

code {
  padding: 2px 0.25rem;
  border-radius: 2px;
  border: 1px solid #757575;
}

/* table of contents styling. Based on the blog of Zachary Wade Betz: https://zwbetz.com/ */
.toc {
  border: .25rem solid #757575;
  padding: 1rem; 
  margin-top: 1rem;
  margin-bottom: 1em;
  color: #757575;
}

.toc a,
.toc a:visited {
  text-decoration: none;
  color: #757575;
}

.toc a {
  padding-bottom: 2px;
  border-bottom: 1px solid;
}

/* misc elements */
img, iframe, video { max-width: 100%; }

blockquote {
  background: #f9f9f9;
  margin: 1em 0;
  padding: 0 2em;
  border-left: 3px solid #ddd;
  font-family: 'Optima', 'STKaiti', 'Kai', 'Kaiti SC', 'KaiTi', 'KaiTi_GB2312', '楷体';
}

/*Styling Custome blocks. based on Yihui Xie's Bookdown book's CSS: 
  https://github.com/rstudio/bookdown/blob/master/inst/examples/css/style.css */
.note,
.important,
.tip,
.caution,
.warning {
  min-height: 2.2em;
  padding: 1em 1em 0.1em 4em;
  background: #f5f5f5 2px top/3em no-repeat;
  font-family: Optima, 'Songti SC', Simsun;
  font-size: 19px;
} 
.note {
  background-image: url("/media/blocks/note.png");
}
.important {
  background-image: url("/media/blocks/important.png");
}
.tip {
  background-image: url("/media/blocks/tip.png");
}
.caution {
  background-image: url("/media/blocks/caution.png");
}
.warning {
  background-image: url("/media/blocks/warning.png");
}
.reminder {
  min-height: 3.2em;
  padding: 1em 1em 1em 4em;
  background: #f5f5f5 2px center/3em no-repeat;
  font-family: Optima, 'Songti SC', Simsun;
  font-size: 19px;
  background-image: url("/media/blocks/reminder.png");
}

table {
  font-size: 19px;
  margin: auto;
  margin-bottom: 2em;
  border-top: 1px solid #666;
  border-bottom: 1px solid #666;
}
table thead th { border-bottom: 1px solid #ddd; }
th, td { padding: 5px; }
thead, tfoot, tr:nth-child(even) { background: #eee; }

/* figure floating */
img[src$='#center']
{
    display: block;
    margin: 0.7rem auto; 
}

/* figure caption styling */
figcaption {
  margin-top: 8px;
  text-align: center;
  color: gray;
} 

figcaption a {
  font-size: 14px;
} 

/* Styling body texts. Based on https://github.com/xiangming/typo/blob/master/css/typo.css */

@charset 'utf-8';
/*!
 * Typo v1.0.6 (http://typo.reqianduan.com/)
 * A typography stylesheet designed for better reading experience.
 * © 2017 Arvin Xiang. All rights reserved.
 */

h1,
h2,
h3,
h4,
h5,
h6 {
  /* 标题应该更贴紧内容，并与其他块区分，margin 值要相应做优化 */
  margin-bottom: 25px;
  line-height: 1.25;
  text-align: center;
}

h1 {
  font-size: 32px;
  font-weight: normal;
  text-align: center;
}

h2 {
  font-size: 28px;
  font-weight: normal;
  text-align: center;
}

h3 {
  font-size: 24px;
  font-weight: normal;
}

h4,
h5,
h6 {
  font-size: 20px;
  color: grey;
}

ul,
ol {
  margin: 0 0 12px;
}
ul li,
ol li {
  font-size: 19px;
}

/*p {
  font-size: 19px;
  margin-top: 0;
  margin-bottom: 1em;
  font-weight: 400;
  line-height: 1.8em;
}*/

/*hyperlink texts styling*/
.list-page a {
  color: black;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid;
}

.list-page a:hover {
}

.list-page sup a {
  border-bottom: none;
}

.body-text.list-text a {
  color: black;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid;
}

.body-text.list-text a:hover {
}

.body-text.list-text sup a {
  border-bottom: none;
}

strong,
b {
  font-weight: 700;
}

em, 

i {
  font-style: italic;
}

figure img {
  display: block;
  box-sizing: border-box;
  max-width: 100%;
  margin: auto auto 4px;
}

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #ddd;
  margin: 40px auto;
  padding: 0;
  max-width: 300px;
}

/* styling the footnotes */
.body-text.list-text a[href^="#fn:"],
.body-text.list-text a[href^="#fnref:"] {
  text-decoration: none;
  color: red;
  font-family: monospace;
  font-size: 14px;
}
.body-text.list-text a[href^="#fn:"]:before{ content: '[' }
.body-text.list-text a[href^="#fn:"]:after{ content: ']' }

/*Responsive design for small screens*/

@media only screen and (max-width: 600px) {

  body {
    font-size: 16px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 18px;
  }

  h3, h4, h5, h6 {
    font-size: 16px;
  }

  pre, code {
    font-size: 12px;
  }

}