:root {
  color-scheme: light;
  --bg: #f7f4ee;
  --surface: #efeadf;
  --ink: #1c1b18;
  --muted: #625e56;
  --line: #d9d2c4;
  --accent: #a8431a;
  --bar: #5b5850;
  --code-kw: #8a3a17;
  --code-str: #2f6b5a;
  --code-fn: #2b4f8a;
  --code-com: #8a857b;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --main: 40rem;
  --side: 15rem;
  --gap: clamp(2rem, 5vw, 4.5rem);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0f1217; --surface: #181c23; --ink: #ebe7df; --muted: #a3a6ab; --line: #2c323c; --accent: #f0a35e; --bar: #b9bbbf;
    --code-kw: #f0a35e; --code-str: #8fc9b0; --code-fn: #9db8e8; --code-com: #7c818a;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1217; --surface: #181c23; --ink: #ebe7df; --muted: #a3a6ab; --line: #2c323c; --accent: #f0a35e; --bar: #b9bbbf;
  --code-kw: #f0a35e; --code-str: #8fc9b0; --code-fn: #9db8e8; --code-com: #7c818a;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.15rem/1.6 var(--serif);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; padding-bottom: 5rem; }
main:focus, main:focus-visible { outline: none; }
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { font-weight: 500; line-height: 1.15; letter-spacing: -.01em; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.3rem, 6vw, 3.6rem); }
h2 { font-size: clamp(1.45rem, 3vw, 1.8rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1.2em; padding-left: 1.2em; }
li { margin-bottom: .45em; }

.wrap { width: 100%; max-width: 72rem; margin: 0 auto; padding: 0 16px; }
.mono, .meta, .eyebrow { font-family: var(--mono); font-size: .78rem; letter-spacing: .01em; line-height: 1.5; }
.meta { color: var(--muted); }
.eyebrow { color: var(--accent); margin: 0 0 .8rem; }
.lede { font-size: clamp(1.25rem, 2.4vw, 1.5rem); line-height: 1.4; }
.muted { color: var(--muted); }
.num { font: .78rem var(--mono); color: var(--accent); margin-right: .85rem; letter-spacing: .04em; vertical-align: .3em; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--bg); padding: .4rem .7rem; z-index: 5; }
.skip:focus { left: 8px; color: var(--bg); }

/* chrome */
.site-head { border-bottom: 1px solid var(--line); }
.head-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; padding-top: .9rem; padding-bottom: .9rem; }
.mark { font-size: 1.15rem; font-weight: 500; text-decoration: none; }
nav { display: flex; align-items: center; gap: .4rem 1rem; font: .8rem var(--mono); flex-wrap: wrap; }
nav a { text-decoration: none; padding: .3rem 0; border-bottom: 2px solid transparent; }
nav a[aria-current="page"] { border-color: var(--accent); }
.theme, .chip, .flow-step { font: .78rem var(--mono); color: inherit; background: none; border: 1px solid var(--line); cursor: pointer; border-radius: 3px; }
.theme { padding: .25rem .55rem; }
.theme:hover, .chip:hover, .flow-step:hover { border-color: var(--accent); color: var(--accent); }
.site-foot { border-top: 1px solid var(--line); padding: 1.5rem 0; }
.foot-row { display: flex; justify-content: space-between; gap: .5rem 1.5rem; flex-wrap: wrap; font: .8rem var(--mono); color: var(--muted); }
.foot-links { display: flex; gap: 1rem; flex-wrap: wrap; }

/* home */
.hero { padding: clamp(4rem, 13vw, 9.5rem) 0 clamp(3rem, 7vw, 5rem); }
.hero .name { font-size: clamp(2.8rem, 8.5vw, 6.2rem); font-weight: 400; line-height: 1; letter-spacing: -.025em; max-width: 12ch; }
.hero .lede { margin: 2rem 0 0; max-width: 34rem; color: var(--muted); }
.index { margin-top: 2.6rem; gap: .5rem 1.8rem; font-size: .85rem; }
.index a { border: 0; }
.index .num { vertical-align: 0; margin-right: .4rem; }
.block { padding: clamp(2.5rem, 6vw, 4.5rem) 0; border-top: 1px solid var(--line); }
.block-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.8rem; }
.block-intro { max-width: var(--main); }
.split { display: grid; grid-template-columns: minmax(0, var(--main)) minmax(0, var(--side)); gap: 1rem var(--gap); margin-bottom: 2.2rem; }
.current { font-size: 1.3rem; line-height: 1.4; }
.current .meta { display: block; margin-bottom: .2rem; }
.cta-stack { display: flex; flex-direction: column; gap: .55rem; font: .82rem var(--mono); border-top: 1px solid var(--line); padding-top: .8rem; align-self: start; overflow-wrap: anywhere; }
@media (max-width: 62rem) { .split { grid-template-columns: 1fr; } }

/* timeline */
.gantt { display: grid; gap: .35rem; }
.gantt-axis { position: relative; height: 1.3rem; margin-left: 15rem; font: .72rem var(--mono); color: var(--muted); }
.gantt-axis span { position: absolute; transform: translateX(-50%); }
.gantt-row { display: grid; grid-template-columns: 15rem 1fr; align-items: center; text-decoration: none; padding: .25rem 0; transition: opacity .15s; }
.gantt-name { font-size: 1rem; line-height: 1.25; padding-right: 1rem; }
.gantt-track { position: relative; height: .8rem; background: var(--surface); }
.gantt-bar { position: absolute; top: 0; bottom: 0; background: var(--bar); transition: background .15s; }
.gantt-row:hover .gantt-bar, .gantt-row:focus-visible .gantt-bar, .gantt-row.current .gantt-bar { background: var(--accent); }
.is-dim { opacity: .28; }
@media (max-width: 40rem) {
  .gantt-axis { margin-left: 0; }
  .gantt-row { grid-template-columns: 1fr; gap: .2rem; padding: .4rem 0; }
}

/* margined article layout: a reading column with a margin for notes and facts */
.article { max-width: calc(var(--main) + var(--side) + var(--gap) + 32px); margin-left: auto; margin-right: auto; }
.art-head, .sec { display: grid; grid-template-columns: minmax(0, var(--main)) minmax(0, var(--side)); column-gap: var(--gap); }
.art-head { padding: clamp(2.2rem, 6vw, 4.2rem) 0 2.4rem; border-bottom: 1px solid var(--line); margin-bottom: 1rem; }
.art-head h1 { margin-bottom: .9rem; }
.art-head .sub { margin: 0 0 1.2rem; }
.art-head .lede { margin: 1rem 0 0; }
.head-note { color: var(--muted); margin: 1.2rem 0 0; font-size: 1.05rem; }
.back { font: .8rem var(--mono); display: inline-block; margin-bottom: 1.6rem; }
.sec { padding-top: 3.2rem; }
.sec h2 { margin-bottom: 1.1rem; }
.sec-side { font-size: .95rem; line-height: 1.5; color: var(--muted); align-self: start; position: sticky; top: 1.5rem; }
.sec-side > p { border-top: 1px solid var(--line); padding-top: .65rem; margin: 0 0 1.1rem; }
.sec-side .meta { display: block; margin-bottom: .15rem; color: var(--accent); }
.sec-side:empty { display: none; }
.facts { margin: 0; align-self: end; }
.facts div { border-top: 1px solid var(--line); padding: .55rem 0; }
.facts dt { margin-bottom: .1rem; }
.facts dd { margin: 0; color: var(--ink); font-size: .98rem; }
.art-head .sec-side { position: static; }
@media (max-width: 62rem) {
  .art-head, .sec { grid-template-columns: minmax(0, 1fr); }
  .sec-side { position: static; margin-top: 1rem; padding-left: 1rem; border-left: 2px solid var(--line); }
  .sec-side > p { border-top: 0; padding-top: 0; }
  .art-head .facts { margin-top: 1.8rem; padding-left: 0; border-left: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); column-gap: 1.2rem; }
}

/* article blocks */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr)); gap: 1rem 2rem; margin: 0 0 2rem; }
.stats div { border-top: 2px solid var(--ink); padding-top: .6rem; }
.stats dt { font-size: clamp(2.2rem, 5vw, 3rem); line-height: 1; letter-spacing: -.02em; }
.stats dd { margin: .4rem 0 0; }
.wide-stats { margin: 2.2rem 0 2.6rem; max-width: var(--main); }
.pull { margin: 2.2rem 0 2.2rem -1.4rem; padding: .2rem 0 .2rem 1.2rem; border-left: 3px solid var(--accent); }
.pull p { font-size: clamp(1.4rem, 3vw, 1.85rem); line-height: 1.3; font-style: italic; margin: 0; }
.pull cite { display: block; margin-top: .6rem; font-style: normal; }
@media (max-width: 40rem) { .pull { margin-left: 0; } }
.callout { background: var(--surface); padding: 1rem 1.2rem; margin: 1.6rem 0; border-radius: 3px; }
.callout .meta { color: var(--accent); margin-bottom: .3rem; }
.callout p:last-child { margin: 0; }
.listing, .diagram { margin: 1.8rem 0 2rem; }
.listing figcaption, .diagram figcaption { display: flex; gap: .2rem .7rem; flex-wrap: wrap; align-items: baseline; margin-bottom: .5rem; }
.diagram figcaption { margin: .6rem 0 0; }
.fig-no { color: var(--accent); }
.lang { margin-left: auto; text-transform: uppercase; letter-spacing: .06em; font-size: .68rem; }
pre { background: var(--surface); border: 1px solid var(--line); padding: 1rem 1.1rem; overflow-x: auto; font: .78rem/1.6 var(--mono); border-radius: 3px; margin: 0; tab-size: 4; }
.diagram-box { background: var(--surface); border: 1px solid var(--line); border-radius: 3px; padding: 1.2rem; overflow-x: auto; text-align: center; }
.diagram-box svg { max-width: 100%; height: auto; }
.diagram-src { display: none; }
.diagram.pending .diagram-box { min-height: 8rem; }
.diagram.failed .diagram-box { display: none; }
.diagram.failed .diagram-src { display: block; }

/* syntax colors for highlight.js */
.hljs-keyword, .hljs-selector-tag, .hljs-literal, .hljs-built_in, .hljs-meta .hljs-keyword { color: var(--code-kw); }
.hljs-string, .hljs-attr, .hljs-symbol, .hljs-template-variable { color: var(--code-str); }
.hljs-title, .hljs-title.function_, .hljs-title.class_, .hljs-name, .hljs-type { color: var(--code-fn); }
.hljs-comment, .hljs-quote, .hljs-doctag { color: var(--code-com); font-style: italic; }
.hljs-number, .hljs-variable { color: var(--accent); }
.hljs-tag, .hljs-meta { color: var(--muted); }

/* clickable step flow */
.flow-steps { list-style: none; padding: 0; margin: 1.2rem 0 0; display: flex; flex-wrap: wrap; gap: .4rem 0; }
.flow-steps li { display: flex; align-items: center; margin: 0; }
.flow-steps li + li::before { content: "\2192"; color: var(--muted); padding: 0 .4rem; font-family: var(--mono); }
.flow-step { padding: .45rem .65rem; }
.flow-step[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.flow-detail { background: var(--surface); border-left: 2px solid var(--accent); padding: .8rem 1rem; margin: .8rem 0 1.6rem; font-size: 1.05rem; min-height: 5.6rem; }

/* lists of entries */
.entry-list { list-style: none; padding: 0; margin: 0; max-width: var(--main); border-top: 1px solid var(--line); }
.entry { margin: 0; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.entry > .meta { margin: 0 0 .3rem; }
.entry h3 a { text-decoration: none; }
.entry-top { display: flex; justify-content: space-between; align-items: baseline; gap: .6rem; }
.entry-sum { margin: .4rem 0 0; font-size: 1.05rem; line-height: 1.5; color: var(--muted); }
.badge { display: inline-block; font: .7rem var(--mono); border: 1px solid var(--line); padding: .1rem .45rem; border-radius: 3px; white-space: nowrap; }
.badge.on { color: var(--accent); border-color: var(--accent); }
.badge.sample { color: var(--muted); border-style: dashed; }

/* work index */
.chips { display: flex; gap: .4rem; flex-wrap: wrap; margin: .5rem 0 0; }
.chip { padding: .3rem .55rem; }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.filter-label { margin-top: 2rem; }
.count { margin: 1.2rem 0 0; min-height: 1.2em; }
.post-list { margin-top: 1rem; }
.post-row { display: grid; grid-template-columns: 12rem 1fr; gap: .3rem 2rem; padding: 1.8rem 0; border-top: 1px solid var(--line); transition: opacity .15s; }
.post-row h2 a { text-decoration: none; }
.post-row p { margin: .5rem 0 .6rem; max-width: var(--main); }
.post-when .num { display: block; margin-bottom: .3rem; vertical-align: 0; }
.tags { display: flex; gap: .25rem .8rem; flex-wrap: wrap; font: .72rem var(--mono); color: var(--muted); margin: 0; padding: 0; list-style: none; }
.tags li { margin: 0; }
.tags .hit { color: var(--accent); }
@media (max-width: 40rem) { .post-row { grid-template-columns: 1fr; } }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; border-top: 1px solid var(--line); margin-top: 4rem; padding-top: 1.2rem; font-size: 1.05rem; }
.pager a { text-decoration: none; }
.pager .meta { display: block; }
.pager .next { text-align: right; }

/* idea notebook */
.more-line { margin: 1.4rem 0 0; max-width: var(--main); }
.idea-group { margin-top: 2rem; }
.idea-domain { font-size: 1.1rem; border-bottom: 1px solid var(--line); padding-bottom: .4rem; margin-bottom: .2rem; }
.idea-domain .meta { margin-left: .4rem; }
.idea-list { list-style: none; padding: 0; margin: 0; }
.idea-list li { padding: .65rem 0; border-bottom: 1px dotted var(--line); margin: 0; display: grid; gap: .1rem; }
.idea-list a { text-decoration: none; font-size: 1.08rem; }
.idea-list .muted { font-size: .98rem; line-height: 1.45; }

/* journal: a blog feed with the date in the margin */
.journal { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); max-width: calc(var(--main) + var(--side) + var(--gap)); }
.jpost { display: grid; grid-template-columns: 7rem minmax(0, 1fr) 8.5rem; gap: .5rem 2rem; padding: 1.6rem 0; border-bottom: 1px solid var(--line); margin: 0; align-items: start; }
.jpost-date { margin: .15rem 0 0; color: var(--accent); }
.jpost-body > .meta { margin: 0 0 .2rem; }
.jpost h3 a { text-decoration: none; }
.jpost-more { display: inline-block; margin-top: .6rem; font-size: .76rem; }
.jpost-img img { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border: 1px solid var(--line); }
@media (max-width: 40rem) {
  .jpost { grid-template-columns: minmax(0, 1fr) 5.5rem; }
  .jpost-date { grid-column: 1 / -1; }
}

/* gallery */
.gallery { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr)); gap: 2.2rem 1.6rem; }
.gallery li { margin: 0; }
.gallery a { text-decoration: none; display: block; }
.gallery figure { margin: 0 0 .7rem; background: var(--surface); }
.gallery figcaption { display: none; }
.gallery img { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; transition: opacity .2s; }
.gallery a:hover img { opacity: .85; }
.gallery-title { display: block; font-size: 1.1rem; }
.item-image { margin: 0 0 1.5rem; }
.item-image img { display: block; width: 100%; max-width: 30rem; height: auto; border: 1px solid var(--line); }
.item-image figcaption { margin-top: .5rem; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }