:root {
  --bg: #fbfaf8; --fg: #1c1b19; --muted: #6b6862; --rule: #e2ded7;
  --link: #8a4b1e; --link-hi: #b8632a; --card: #ffffff; --code-bg: #f4f1ec;
  --accent: #8a4b1e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17161a; --fg: #e6e3dd; --muted: #9a958c; --rule: #2f2d33;
    --link: #e0a06a; --link-hi: #f0bd8e; --card: #1e1d22; --code-bg: #22212a;
    --accent: #e0a06a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 ui-serif, Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 3rem 1.25rem 5rem; }
.doc .wrap { max-width: 52rem; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--link-hi); }
h1, h2, h3, h4 {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.25; font-weight: 650; letter-spacing: -0.01em;
}
h1 { font-size: 1.9rem; margin: 0 0 .35rem; }
h2 { font-size: 1.3rem; margin: 2.4rem 0 .6rem; padding-bottom: .3rem; border-bottom: 1px solid var(--rule); }
h3 { font-size: 1.08rem; margin: 1.8rem 0 .4rem; }
h4 { font-size: .98rem; margin: 1.4rem 0 .3rem; color: var(--muted); }
p, ul, ol { margin: .8rem 0; }
li { margin: .25rem 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
code, pre, kbd {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: .87em;
}
code { background: var(--code-bg); padding: .12em .35em; border-radius: 3px; }
pre {
  background: var(--code-bg); padding: .85rem 1rem; border-radius: 6px;
  overflow-x: auto; border: 1px solid var(--rule); line-height: 1.5;
}
pre code { background: none; padding: 0; }
blockquote {
  margin: 1rem 0; padding: .1rem 0 .1rem 1rem;
  border-left: 3px solid var(--rule); color: var(--muted);
}
/* tables: the documents are mostly tables of measurements */
.tablewrap { overflow-x: auto; margin: 1.1rem 0; }
table { border-collapse: collapse; font-size: .93rem; min-width: 100%; }
th, td { padding: .42rem .7rem; text-align: left; border-bottom: 1px solid var(--rule); }
th {
  font-family: ui-sans-serif, system-ui, sans-serif; font-size: .8rem;
  font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
  color: var(--muted); border-bottom: 1.5px solid var(--rule); white-space: nowrap;
}
td:not(:first-child) { font-variant-numeric: tabular-nums; }
tbody tr:last-child td { border-bottom: none; }

/* index */
.sub { color: var(--muted); font-size: 1.05rem; margin: 0 0 2rem; }
.intro { font-size: 1.02rem; }
.intro strong { font-weight: 650; }
.next {
  display: inline-block; margin: 1.1rem 0 .3rem;
  font-family: ui-sans-serif, system-ui, sans-serif; font-weight: 600;
  font-size: .95rem; text-decoration: none;
  padding: .5rem .95rem; border: 1px solid var(--rule); border-radius: 6px;
  background: var(--card); transition: border-color .12s ease;
}
.next:hover { border-color: var(--accent); }
.cards { list-style: none; padding: 0; margin: 1.5rem 0 0; }
.cards li { margin: 0 0 .9rem; }
.card {
  display: block; padding: 1rem 1.15rem; background: var(--card);
  border: 1px solid var(--rule); border-radius: 8px; text-decoration: none;
  color: inherit; transition: border-color .12s ease, transform .12s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card .t {
  font-family: ui-sans-serif, system-ui, sans-serif; font-weight: 650;
  font-size: 1.05rem; color: var(--link); margin-bottom: .2rem;
}
.card:hover .t { color: var(--link-hi); }
.card .b { color: var(--fg); font-size: .95rem; line-height: 1.55; }
.card .m { color: var(--muted); font-size: .78rem; margin-top: .5rem;
  font-family: ui-sans-serif, system-ui, sans-serif; }
.tag {
  display: inline-block; font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: .68rem; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); border: 1px solid var(--rule); border-radius: 3px;
  padding: .1rem .38rem; vertical-align: .12em; margin-left: .5rem;
}
.foot { margin-top: 3.5rem; padding-top: 1.2rem; border-top: 1px solid var(--rule);
  color: var(--muted); font-size: .87rem; }
.sig { display: flex; gap: 1rem; align-items: flex-start; }
.sig p { margin: 0; }
.mark { flex: 0 0 auto; width: 56px; height: 56px; margin-top: .05rem; }
.foot a { color: var(--muted); }

/* doc pages */
.bar {
  font-family: ui-sans-serif, system-ui, sans-serif; font-size: .87rem;
  margin-bottom: 2rem; padding-bottom: .9rem; border-bottom: 1px solid var(--rule);
  display: flex; gap: 1rem; flex-wrap: wrap; align-items: baseline;
}
.bar .grow { flex: 1; }
.toc {
  background: var(--card); border: 1px solid var(--rule); border-radius: 8px;
  padding: .5rem 1.1rem; margin: 0 0 2rem;
  font-family: ui-sans-serif, system-ui, sans-serif; font-size: .9rem;
}
.toc > ul { margin: .6rem 0; padding-left: 1.1rem; }
.toc ul ul { padding-left: 1rem; }
.toc li { margin: .16rem 0; }
.toc .toctitle {
  font-weight: 650; font-size: .74rem; text-transform: uppercase;
  letter-spacing: .07em; color: var(--muted); margin: .7rem 0 0;
}
@media (max-width: 34rem) {
  .wrap { padding: 2rem 1rem 3.5rem; }
  h1 { font-size: 1.55rem; }
}

/* pygments, light */
pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight { background: #f8f8f8; }
.highlight .c { color: #3D7B7B; 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: #3D7B7B; font-style: italic } /* Comment.Hashbang */
.highlight .cm { color: #3D7B7B; font-style: italic } /* Comment.Multiline */
.highlight .cp { color: #9C6500 } /* Comment.Preproc */
.highlight .cpf { color: #3D7B7B; font-style: italic } /* Comment.PreprocFile */
.highlight .c1 { color: #3D7B7B; font-style: italic } /* Comment.Single */
.highlight .cs { color: #3D7B7B; font-style: italic } /* Comment.Special */
.highlight .gd { color: #A00000 } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #E40000 } /* Generic.Error */
.highlight .gh { color: #000080; font-weight: bold } /* Generic.Heading */
.highlight .gi { color: #008400 } /* Generic.Inserted */
.highlight .go { color: #717171 } /* 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: #687822 } /* 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: #717171; font-weight: bold } /* Name.Entity */
.highlight .ne { color: #CB3F38; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0000FF } /* Name.Function */
.highlight .nl { color: #767600 } /* 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: #AA5D1F; font-weight: bold } /* Literal.String.Escape */
.highlight .sh { color: #BA2121 } /* Literal.String.Heredoc */
.highlight .si { color: #A45A77; font-weight: bold } /* Literal.String.Interpol */
.highlight .sx { color: #008000 } /* Literal.String.Other */
.highlight .sr { color: #A45A77 } /* 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 */
@media (prefers-color-scheme: dark) {
pre { line-height: 125%; }
td.linenos .normal { color: #6e7681; background-color: #0d1117; padding-left: 5px; padding-right: 5px; }
span.linenos { color: #6e7681; background-color: #0d1117; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #e6edf3; background-color: #6e7681; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #e6edf3; background-color: #6e7681; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #6e7681 }
.highlight { background: #0d1117; color: #e6edf3 }
.highlight .c { color: #8b949e; font-style: italic } /* Comment */
.highlight .err { color: #f85149 } /* Error */
.highlight .esc { color: #e6edf3 } /* Escape */
.highlight .g { color: #e6edf3 } /* Generic */
.highlight .k { color: #ff7b72 } /* Keyword */
.highlight .l { color: #a5d6ff } /* Literal */
.highlight .n { color: #e6edf3 } /* Name */
.highlight .o { color: #ff7b72; font-weight: bold } /* Operator */
.highlight .x { color: #e6edf3 } /* Other */
.highlight .p { color: #e6edf3 } /* Punctuation */
.highlight .ch { color: #8b949e; font-style: italic } /* Comment.Hashbang */
.highlight .cm { color: #8b949e; font-style: italic } /* Comment.Multiline */
.highlight .cp { color: #8b949e; font-weight: bold; font-style: italic } /* Comment.Preproc */
.highlight .cpf { color: #8b949e; font-style: italic } /* Comment.PreprocFile */
.highlight .c1 { color: #8b949e; font-style: italic } /* Comment.Single */
.highlight .cs { color: #8b949e; font-weight: bold; font-style: italic } /* Comment.Special */
.highlight .gd { color: #ffa198; background-color: #490202 } /* Generic.Deleted */
.highlight .ge { color: #e6edf3; font-style: italic } /* Generic.Emph */
.highlight .ges { color: #e6edf3; font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #ffa198 } /* Generic.Error */
.highlight .gh { color: #79c0ff; font-weight: bold } /* Generic.Heading */
.highlight .gi { color: #56d364; background-color: #0f5323 } /* Generic.Inserted */
.highlight .go { color: #8b949e } /* Generic.Output */
.highlight .gp { color: #8b949e } /* Generic.Prompt */
.highlight .gs { color: #e6edf3; font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #79c0ff } /* Generic.Subheading */
.highlight .gt { color: #ff7b72 } /* Generic.Traceback */
.highlight .g-Underline { color: #e6edf3; text-decoration: underline } /* Generic.Underline */
.highlight .kc { color: #79c0ff } /* Keyword.Constant */
.highlight .kd { color: #ff7b72 } /* Keyword.Declaration */
.highlight .kn { color: #ff7b72 } /* Keyword.Namespace */
.highlight .kp { color: #79c0ff } /* Keyword.Pseudo */
.highlight .kr { color: #ff7b72 } /* Keyword.Reserved */
.highlight .kt { color: #ff7b72 } /* Keyword.Type */
.highlight .ld { color: #79c0ff } /* Literal.Date */
.highlight .m { color: #a5d6ff } /* Literal.Number */
.highlight .s { color: #a5d6ff } /* Literal.String */
.highlight .na { color: #e6edf3 } /* Name.Attribute */
.highlight .nb { color: #e6edf3 } /* Name.Builtin */
.highlight .nc { color: #f0883e; font-weight: bold } /* Name.Class */
.highlight .no { color: #79c0ff; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #d2a8ff; font-weight: bold } /* Name.Decorator */
.highlight .ni { color: #ffa657 } /* Name.Entity */
.highlight .ne { color: #f0883e; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #d2a8ff; font-weight: bold } /* Name.Function */
.highlight .nl { color: #79c0ff; font-weight: bold } /* Name.Label */
.highlight .nn { color: #ff7b72 } /* Name.Namespace */
.highlight .nx { color: #e6edf3 } /* Name.Other */
.highlight .py { color: #79c0ff } /* Name.Property */
.highlight .nt { color: #7ee787 } /* Name.Tag */
.highlight .nv { color: #79c0ff } /* Name.Variable */
.highlight .ow { color: #ff7b72; font-weight: bold } /* Operator.Word */
.highlight .pm { color: #e6edf3 } /* Punctuation.Marker */
.highlight .w { color: #6e7681 } /* Text.Whitespace */
.highlight .mb { color: #a5d6ff } /* Literal.Number.Bin */
.highlight .mf { color: #a5d6ff } /* Literal.Number.Float */
.highlight .mh { color: #a5d6ff } /* Literal.Number.Hex */
.highlight .mi { color: #a5d6ff } /* Literal.Number.Integer */
.highlight .mo { color: #a5d6ff } /* Literal.Number.Oct */
.highlight .sa { color: #79c0ff } /* Literal.String.Affix */
.highlight .sb { color: #a5d6ff } /* Literal.String.Backtick */
.highlight .sc { color: #a5d6ff } /* Literal.String.Char */
.highlight .dl { color: #79c0ff } /* Literal.String.Delimiter */
.highlight .sd { color: #a5d6ff } /* Literal.String.Doc */
.highlight .s2 { color: #a5d6ff } /* Literal.String.Double */
.highlight .se { color: #79c0ff } /* Literal.String.Escape */
.highlight .sh { color: #79c0ff } /* Literal.String.Heredoc */
.highlight .si { color: #a5d6ff } /* Literal.String.Interpol */
.highlight .sx { color: #a5d6ff } /* Literal.String.Other */
.highlight .sr { color: #79c0ff } /* Literal.String.Regex */
.highlight .s1 { color: #a5d6ff } /* Literal.String.Single */
.highlight .ss { color: #a5d6ff } /* Literal.String.Symbol */
.highlight .bp { color: #e6edf3 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #d2a8ff; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #79c0ff } /* Name.Variable.Class */
.highlight .vg { color: #79c0ff } /* Name.Variable.Global */
.highlight .vi { color: #79c0ff } /* Name.Variable.Instance */
.highlight .vm { color: #79c0ff } /* Name.Variable.Magic */
.highlight .il { color: #a5d6ff } /* Literal.Number.Integer.Long */
}