html {
  font-size: 1.0625rem;
}

body {
  padding-top: 7rem;
}

h1 {
  margin-bottom: 20px;
  color: #333;
}

h2, h3 {
  color: #333;
  margin: 30px 0 15px 0;
}

h4, h5 {
  color: #333;
}

table {
  width: 100%;
  max-width: 100%;
  margin-bottom: 1rem;
  background-color: transparent;
}

table td, table th {
  padding: .75rem;
  vertical-align: top;
  border-top: 1px solid #dee2e6;
}

blockquote {
    color: #6f6f6f;
    padding: 10.5px 21px;
    margin: 0 0 21px;
    border-left: .2em solid #ddd;
}

/*
navbar
 */

.nav-logo-container {
  align-items: center;
  height: 100%;
  display: flex;
}

.nav-logo {
  height: 1.8rem;
}

.nav-purcahse-btn {
  padding-left: 20px;
}

/*
sidebar
 */

.collection ul {
  list-style: none;
  padding: 0 5px 0 10px;
}

.collection li {
  list-style: none;
}

.collapsible-body > ul {
  padding-left: 0;
}

.collapsible a:link, .collapsible a:visited {
  color: #66a;
}

/*
footer
 */

.footer {
  margin-top: 50px;
  bottom: 0;
  width: 100%;
}

/*
contents page
 */

.lessons-list {
  list-style: disc;
  padding-left: 0;
  margin-top: 10px;
}

.collection-li-contents {
  padding-left: 15px;
  margin: 0;
  list-style: none;
}

/*
code formatting
 */
pre, code {
  font-family: Monaco, Menlo, Consolas, "Courier New", DotumChe, monospace;
  font-size: 13px;
  border: 1px solid #e8e8e8;
  border-radius: 0;
  background-color: whitesmoke;
}

code {
  padding: 1px 5px;
  color: #d44950;
}

pre {
  padding: 8px 12px;
  overflow-x: auto;
}

pre > code {
  border: 0;
  padding-right: 0;
  padding-left: 0;
}

/*
blog
 */

.no_toc {
  display: none;
}

@media screen and (max-width: 991px) {
  .no_toc {
    display: block;
  }
}

.blog-list li {
  margin: 0;
  list-style: none;
}

.blog-list ul {
  padding-left: 0;
}

/*
blog-toc
 */

.blog-toc-container {
  position: sticky;
  top: 70px;
}

.blog-toc-subcontainer {
  padding: 1rem;
}

.blog-toc {
  margin-bottom: 0;
  padding-bottom: 0;
  padding-top: 0;
}

/*
syntax highlighting
*/

.highlight .hll { background-color: #ffffcc }
.highlight  { background: #f8f8f8; }
.highlight .c { color: #408080; font-style: italic } /* Comment */
.highlight .err { border: 1px solid #FF0000 } /* Error */
.highlight .k { color: #008000; font-weight: bold } /* Keyword */
.highlight .o { color: #666666 } /* Operator */
.highlight .ch { color: #408080; font-style: italic } /* Comment.Hashbang */
.highlight .cm { color: #408080; font-style: italic } /* Comment.Multiline */
.highlight .cp { color: #BC7A00 } /* Comment.Preproc */
.highlight .cpf { color: #408080; font-style: italic } /* Comment.PreprocFile */
.highlight .c1 { color: #408080; font-style: italic } /* Comment.Single */
.highlight .cs { color: #408080; font-style: italic } /* Comment.Special */
.highlight .gd { color: #A00000 } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #FF0000 } /* Generic.Error */
.highlight .gh { color: #000080; font-weight: bold } /* Generic.Heading */
.highlight .gi { color: #00A000 } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #000080; font-weight: bold } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
.highlight .gt { color: #0044DD } /* Generic.Traceback */
.highlight .kc { color: #008000; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008000; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008000; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008000 } /* Keyword.Pseudo */
.highlight .kr { color: #008000; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #B00040 } /* Keyword.Type */
.highlight .m { color: #666666 } /* Literal.Number */
.highlight .s { color: #BA2121 } /* Literal.String */
.highlight .na { color: #7D9029 } /* Name.Attribute */
.highlight .nb { color: #008000 } /* Name.Builtin */
.highlight .nc { color: #0000FF; font-weight: bold } /* Name.Class */
.highlight .no { color: #880000 } /* Name.Constant */
.highlight .nd { color: #AA22FF } /* Name.Decorator */
.highlight .ni { color: #999999; font-weight: bold } /* Name.Entity */
.highlight .ne { color: #D2413A; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0000FF } /* Name.Function */
.highlight .nl { color: #A0A000 } /* Name.Label */
.highlight .nn { color: #0000FF; font-weight: bold } /* Name.Namespace */
.highlight .nt { color: #008000; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #19177C } /* Name.Variable */
.highlight .ow { color: #AA22FF; font-weight: bold } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #666666 } /* Literal.Number.Bin */
.highlight .mf { color: #666666 } /* Literal.Number.Float */
.highlight .mh { color: #666666 } /* Literal.Number.Hex */
.highlight .mi { color: #666666 } /* Literal.Number.Integer */
.highlight .mo { color: #666666 } /* Literal.Number.Oct */
.highlight .sa { color: #BA2121 } /* Literal.String.Affix */
.highlight .sb { color: #BA2121 } /* Literal.String.Backtick */
.highlight .sc { color: #BA2121 } /* Literal.String.Char */
.highlight .dl { color: #BA2121 } /* Literal.String.Delimiter */
.highlight .sd { color: #BA2121; font-style: italic } /* Literal.String.Doc */
.highlight .s2 { color: #BA2121 } /* Literal.String.Double */
.highlight .se { color: #BB6622; font-weight: bold } /* Literal.String.Escape */
.highlight .sh { color: #BA2121 } /* Literal.String.Heredoc */
.highlight .si { color: #BB6688; font-weight: bold } /* Literal.String.Interpol */
.highlight .sx { color: #008000 } /* Literal.String.Other */
.highlight .sr { color: #BB6688 } /* Literal.String.Regex */
.highlight .s1 { color: #BA2121 } /* Literal.String.Single */
.highlight .ss { color: #19177C } /* Literal.String.Symbol */
.highlight .bp { color: #008000 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0000FF } /* Name.Function.Magic */
.highlight .vc { color: #19177C } /* Name.Variable.Class */
.highlight .vg { color: #19177C } /* Name.Variable.Global */
.highlight .vi { color: #19177C } /* Name.Variable.Instance */
.highlight .vm { color: #19177C } /* Name.Variable.Magic */
.highlight .il { color: #666666 } /* Literal.Number.Integer.Long */