/* "How I built AI Papers Daily" (src/making_of.py): its own engineering-blog layout in the site palette. */
@font-face { font-family: "Geist"; src: url(fonts/geist.woff2) format("woff2"); font-weight: 100 900; }
@font-face { font-family: "Geist Mono"; src: url(fonts/geist-mono.woff2) format("woff2"); font-weight: 400 600; }
@font-face { font-family: "Geist Pixel"; src: url(fonts/geist-pixel-square.woff2) format("woff2"); }
/* The site's palette: warm paper, near-black ink, international orange for what matters, highlighter yellow for highlights */
:root {
  --bg: #ffffff; --wash: #f7f5f0; --ink: #0e0e10; --ink-2: #2b2a30; --body: #45444b; --muted: #6b6a72;
  --line: #e8e5de; --line-2: #dcd9d1; --act: #ff4f00; --act-h: #e04600; --act-ink: #c43c00; --act-wash: #fff1e9; --act-line: #ffc3a6;
  --yellow: #ffd23f; --yellow-wash: #fff6cc; --hot: #ffd23f; --code-bg: #0e0e10; --code: #ebe8e1;
  --a1: #ffe9de; --a2: #ffc3a3; --a3: #ff8549; --a4: #ff4f00; --art-bg: #f7f5f0; --pick-line: #0e0e10;
  --sh-3: rgba(60,30,10,.18) 0 30px 45px -30px, rgba(0,0,0,.08) 0 18px 36px -18px; --sh-1: rgba(0,0,0,.06) 0 3px 6px;
  --sans: "Geist", ui-sans-serif, system-ui, sans-serif; --mono: "Geist Mono", ui-monospace, monospace; --pixel: "Geist Pixel", "Geist Mono", monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0b0b0c; --wash: #141416; --ink: #f2f0ea; --ink-2: #dedbd3; --body: #b9b7bf; --muted: #8f8d95;
  --line: #232327; --line-2: #2e2e33; --act: #ff5a1f; --act-h: #ff7a45; --act-ink: #ff7a45; --act-wash: #2a160d; --act-line: #6b2d12;
  --yellow-wash: #3d330c; --code-bg: #050506; --a1: #2a160d; --a2: #6b2d12; --a3: #c2440f; --a4: #ff5a1f; --art-bg: #141416; --pick-line: #ffd23f;
  --sh-3: rgba(0,0,0,.55) 0 30px 45px -30px; --sh-1: none; } }
:root[data-theme="dark"] {
  --bg: #0b0b0c; --wash: #141416; --ink: #f2f0ea; --ink-2: #dedbd3; --body: #b9b7bf; --muted: #8f8d95;
  --line: #232327; --line-2: #2e2e33; --act: #ff5a1f; --act-h: #ff7a45; --act-ink: #ff7a45; --act-wash: #2a160d; --act-line: #6b2d12;
  --yellow-wash: #3d330c; --code-bg: #050506; --a1: #2a160d; --a2: #6b2d12; --a3: #c2440f; --a4: #ff5a1f; --art-bg: #141416; --pick-line: #ffd23f;
  --sh-3: rgba(0,0,0,.55) 0 30px 45px -30px; --sh-1: none; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--body); font: 300 17px/1.6 var(--sans); font-feature-settings: "ss01"; -webkit-font-smoothing: antialiased; }
a { color: var(--act); text-decoration: none; }
a:hover { color: var(--act-h); }
:focus-visible { outline: 2px solid var(--act); outline-offset: 2px; border-radius: 2px; }
.in { width: 100%; max-width: 1120px; margin-inline: auto; padding-inline: 24px; }
.lbl { margin: 0; font: 500 12px/1.2 var(--mono); letter-spacing: .02em; color: var(--muted); }
.lbl-on { color: var(--act); }
/* top bar */
.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.top .in { display: flex; align-items: center; gap: 28px; height: 60px; }
.home { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 500; font-size: 15px; }
.home:hover { color: var(--ink); }
.mk { width: 18px; height: 18px; border-radius: 3px; background: conic-gradient(from 90deg, var(--act) 0 25%, var(--ink) 0 50%, var(--act) 0 75%, var(--ink) 0); }
.sl { color: var(--line-2); } .mut { color: var(--muted); font-weight: 400; }
.top nav { display: flex; gap: 4px; margin-left: auto; }
.top nav a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 6px; color: var(--ink-2); font-size: 14px; font-weight: 400; }
.top nav a:hover { background: var(--wash); color: var(--ink); }
.top nav a[aria-current] { color: var(--ink); font-weight: 500; }
kbd { display: inline-grid; place-items: center; width: 20px; height: 20px; border: 1px solid var(--line-2); border-radius: 4px; font: 500 11px var(--mono); color: var(--muted); background: var(--bg); }
.top nav a[aria-current] kbd { border-color: var(--act); color: var(--act); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border-radius: 4px; background: var(--act); color: #fff; font: 400 15px/1 var(--sans); white-space: nowrap; }
.btn:hover { background: var(--act-h); color: #fff; }
.btn svg, .ghost svg, .res svg { width: 14px; height: 14px; }
/* hero */
.hero { padding-top: 48px; }
.crumb { margin: 0; font: 400 13px var(--mono); color: var(--muted); }
.crumb a { color: var(--muted); } .crumb span { margin: 0 6px; color: var(--line-2); }
.hero h1 { margin: 20px 0 0; max-width: 16ch; color: var(--ink); font: 300 clamp(40px, 6.4vw, 76px)/1.02 var(--sans); letter-spacing: -.035em; }
.deck { margin: 24px 0 0; max-width: 60ch; font-size: 20px; line-height: 1.5; color: var(--body); }
.meta { display: grid; grid-template-columns: repeat(4, minmax(0, auto)); justify-content: start; gap: 8px 48px; margin: 40px 0 0; padding: 18px 0; border-block: 1px solid var(--line); }
.meta .lbl { grid-column: 1 / -1; }
.meta dt { font: 400 12px var(--mono); color: var(--muted); }
.meta dd { margin: 4px 0 0; color: var(--ink); font-size: 15px; font-weight: 400; font-feature-settings: "tnum"; }
.acts { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 18px; }
.ghost { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border: 1px solid var(--act-line); border-radius: 4px; background: transparent; color: var(--act); font: 400 14px/1.2 var(--sans); cursor: pointer; }
.ghost:hover { background: var(--act-wash); }
.share { margin-left: auto; font-size: 14px; color: var(--muted); } .share a { margin-left: 8px; }
/* cover */
.cover { position: relative; margin-top: 40px; }
.art { display: block; width: 100%; height: 380px; border-radius: 8px; background: var(--art-bg); border: 1px solid var(--line); }
.art .a1 { fill: var(--a1); } .art .a2 { fill: var(--a2); } .art .a3 { fill: var(--a3); } .art .a4 { fill: var(--a4); } .art .pick { fill: var(--yellow); stroke: var(--pick-line); stroke-width: 2; }
.fig-n { font: 500 12px var(--mono); color: var(--act-ink); margin-right: 10px; white-space: nowrap; }
.on-art { position: absolute; left: 40px; bottom: 16px; padding: 4px 8px; border-radius: 4px; background: var(--bg); color: var(--ink-2); white-space: normal; box-shadow: var(--sh-1); }
/* article */
.body { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 72px; margin-top: 64px; }
.toc { position: sticky; top: 92px; align-self: start; }
.toc ol { list-style: none; margin: 14px 0 0; padding: 0; }
.toc a { display: block; padding: 5px 0; font-size: 14px; font-weight: 400; color: var(--muted); }
.toc a:hover { color: var(--ink); }
.toc a[aria-current] { color: var(--act); }
.toc a[aria-current]::before { content: "→ "; }
article { max-width: 720px; }
article > p { margin: 18px 0 0; }
.lede { margin-top: 0 !important; font-size: 22px; line-height: 1.5; color: var(--ink); letter-spacing: -.01em; }
article h2 { margin: 72px 0 0; color: var(--ink); font: 300 34px/1.12 var(--sans); letter-spacing: -.025em; scroll-margin-top: 84px; }
article b { font-weight: 500; color: var(--ink); }
.feat, .broke { margin: 20px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.feat li { padding-left: 22px; position: relative; }
.feat li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 8px; height: 8px; border-radius: 2px; background: var(--act); }
.broke { counter-reset: b; }
.broke li { counter-increment: b; position: relative; padding: 16px 18px 16px 56px; border: 1px solid var(--line); border-radius: 6px; background: var(--wash); }
.broke li::before { content: "0" counter(b); position: absolute; left: 18px; top: 17px; font: 500 13px var(--mono); color: var(--act); }
/* figures */
.fig { margin: 36px 0 0; }
.fig-box { overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); box-shadow: var(--sh-3); }
.fig.pad .fig-box { padding: 20px; }
.fig img { display: block; width: 100%; height: auto; }
.fig figcaption { display: flex; gap: 0; margin-top: 14px; font-size: 14px; line-height: 1.5; color: var(--muted); }
.fig .fig-n { flex: none; }
.two { display: grid; grid-template-columns: 4fr 7fr; gap: 24px; align-items: start; }
.two .tall img { max-height: 430px; object-fit: cover; object-position: top; }
.cmp { display: grid; grid-template-columns: 1fr 1fr; }
.cmp > div { padding: 22px; }
.cmp > div + div { border-left: 1px solid var(--line); background: var(--wash); }
.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 14px; }
.flow span { padding: 6px 10px; border-radius: 4px; border: 1px solid var(--line-2); background: var(--bg); font-size: 13.5px; font-weight: 400; color: var(--ink-2); line-height: 1.3; }
.flow.slow span { border-style: dashed; color: var(--muted); }
.flow.fast span { border-color: var(--act-line); color: var(--act); background: var(--bg); }
.flow i { font-style: normal; color: var(--muted); font-size: 13px; }
.cmp-t { margin: 18px 0 0; font: 300 30px/1 var(--sans); letter-spacing: -.02em; color: var(--muted); font-feature-settings: "tnum"; }
.cmp-t.on { color: var(--act); }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 44px; border-top: 1px solid var(--line); }
.stats div { padding: 18px 16px 0 0; }
.stats b { display: block; font: 300 40px/1 var(--sans); letter-spacing: -.03em; color: var(--ink); font-feature-settings: "tnum"; }
.stats span { display: block; margin-top: 8px; font: 400 12px var(--mono); color: var(--muted); }
.pipe { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.pipe li { padding: 16px; background: var(--bg); }
.pipe code { font: 500 12px var(--mono); color: var(--act); }
.pipe b { display: block; margin-top: 10px; font-size: 17px; }
.pipe span { display: block; margin-top: 2px; font-size: 14px; color: var(--muted); }
.seq { display: block; width: 100%; height: auto; }
.seq .ln { stroke: var(--line-2); stroke-dasharray: 2 4; }
.seq .ln-box { fill: var(--wash); stroke: var(--line-2); }
.seq .ln-t { font: 500 12.5px var(--mono); fill: var(--ink); text-anchor: middle; }
.seq .msg { stroke: var(--act); stroke-width: 1.4; } .seq .hd { fill: var(--act); }
.seq .msg.back { stroke: var(--muted); stroke-dasharray: 4 3; } .seq .hd.back { fill: var(--muted); }
.seq .mt { font: 400 12.5px var(--sans); fill: var(--ink-2); text-anchor: middle; }
.fig.code .fig-box { background: var(--code-bg); border-color: var(--code-bg); }
pre { margin: 0; padding: 20px 22px; overflow-x: auto; font: 500 13px/2 var(--mono); color: var(--code); }
pre .k { color: #ff8a52; } pre .s { color: #ffd23f; } pre .c { color: #7d7b84; }
.cta { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 56px; padding: 28px; border-radius: 8px; background: #0e0e10; color: rgba(255,255,255,.72); border-top: 4px solid var(--act); }
.cta b { display: block; color: #fff; font-size: 22px; font-weight: 300; letter-spacing: -.01em; }
.cta span { font-size: 15px; }
.cta .btn { background: var(--act); color: #fff; } .cta .btn:hover { background: var(--act-h); color: #fff; }
.author, .res { margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--line); }
.res { margin-top: 32px; }
.who { display: flex; gap: 16px; margin-top: 16px; }
.av { width: 48px; height: 48px; flex: none; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: var(--bg); font: 500 15px var(--sans); }
.who h3 { margin: 0; color: var(--ink); font-size: 18px; font-weight: 400; }
.who p { margin: 4px 0 0; font-size: 15px; }
.res ul { list-style: none; margin: 12px 0 0; padding: 0; }
.res li a { display: inline-flex; align-items: center; gap: 6px; padding: 5px 0; font-size: 16px; font-weight: 400; }
/* related */
.related { margin-top: 96px; padding-top: 24px; border-top: 1px solid var(--line); }
.rel { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 20px; }
.rel a { display: block; color: var(--ink); }
.rel-art { position: relative; }
.rel-art .art { height: 180px; }
.rel-art .on-art { left: 12px; bottom: 12px; }
.rel b { display: block; margin-top: 14px; font-size: 18px; line-height: 1.35; font-weight: 400; letter-spacing: -.01em; }
.rel a:hover b { color: var(--act); }
.rel span { display: block; margin-top: 6px; font: 400 12px var(--mono); color: var(--muted); }
.foot { margin-top: 96px; padding: 40px 0 56px; background: var(--wash); border-top: 1px solid var(--line); }
.foot .in { display: grid; grid-template-columns: repeat(3, 180px) 1fr; gap: 32px; }
.foot a { display: block; margin-top: 8px; font-size: 14px; font-weight: 400; color: var(--ink-2); }
.copy { margin: 0; font-size: 13px; color: var(--muted); align-self: end; }
@media (max-width: 960px) { .body { grid-template-columns: 1fr; gap: 0; margin-top: 48px; } .toc { display: none; } .top nav a { padding: 8px 6px; } }
@media (max-width: 720px) {
  .top nav, .top .btn { display: none; } .hero { padding-top: 32px; } .deck { font-size: 17px; } .lede { font-size: 19px; }
  .meta { grid-template-columns: 1fr 1fr; gap: 14px 20px; } .share { margin-left: 0; width: 100%; }
  .art { height: 240px; } .on-art { left: 12px; right: 12px; bottom: 12px; }
  article h2 { font-size: 28px; margin-top: 56px; }
  .cmp, .two { grid-template-columns: 1fr; } .cmp > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .pipe { grid-template-columns: 1fr 1fr; } .stats { grid-template-columns: 1fr 1fr; } .stats div:nth-child(n+3) { padding-top: 24px; }
  .cta { flex-direction: column; align-items: flex-start; } .rel { grid-template-columns: 1fr; } .foot .in { grid-template-columns: 1fr 1fr; } .copy { grid-column: 1 / -1; }
  .fig figcaption { flex-direction: column; gap: 4px; } body { font-size: 16px; } .broke li { padding-left: 48px; } .broke li::before { left: 14px; }
}
/* v4 additions */
.prog { position: fixed; top: 0; left: 0; z-index: 9; height: 3px; width: 18%; background: var(--act); }
mark { background: linear-gradient(transparent 55%, var(--yellow) 55%); color: inherit; padding: 0 .08em; }
.hero h1 mark { background: linear-gradient(transparent 62%, var(--yellow) 62%); }
.sp-x {}
.tldr { margin-top: 40px; padding: 22px 26px; border: 1px solid var(--line); border-left: 4px solid var(--yellow); border-radius: 8px; background: var(--wash); max-width: 1072px; }
.tldr ul { margin: 12px 0 0; padding-left: 18px; display: grid; gap: 8px; color: var(--ink-2); font-size: 16px; }
.tldr b { font-weight: 500; color: var(--ink); }
article h2 { display: flex; align-items: baseline; gap: 14px; }
article h2 code { font: 500 14px var(--mono); color: var(--act-ink); letter-spacing: 0; }
.toc ol { counter-reset: none; max-height: calc(100vh - 140px); overflow: auto; }
.toc a { display: flex; gap: 10px; }
.toc a code { font: 400 12px/1.9 var(--mono); color: var(--line-2); }
.toc a[aria-current]::before { content: none; }
.toc a[aria-current] { color: var(--ink); font-weight: 500; }
.toc a[aria-current] code { color: var(--act); }
article code { font: 500 .86em var(--mono); color: var(--ink); background: var(--wash); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
pre code, h2 code, .toc code, .tl code, .tour code { background: none !important; border: 0 !important; padding: 0 !important; }
.small { font-size: 14px; color: var(--muted); }
.note { margin: 32px 0 0; padding: 18px 22px; border-radius: 8px; background: var(--yellow-wash); border: 1px solid color-mix(in srgb, var(--yellow) 60%, var(--line)); }
.note .lbl { color: var(--ink-2); }
.note p:last-child { margin: 6px 0 0; color: var(--ink-2); font-size: 16px; }
.tbl { margin-top: 28px; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
.tbl table { width: 100%; border-collapse: collapse; font-size: 15px; }
.tbl th { text-align: left; padding: 10px 14px; background: var(--wash); font: 500 12px var(--mono); color: var(--muted); border-bottom: 1px solid var(--line); }
.tbl td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--body); }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td:first-child { color: var(--ink); white-space: nowrap; }
.tbl.num td:not(:first-child) { font-feature-settings: "tnum"; }
.tbl.num tr:last-child td { background: var(--yellow-wash); color: var(--ink); }
.graph { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 0; }
.graph i { width: 22px; height: 2px; background: var(--line-2); position: relative; }
.graph i::after { content: ""; position: absolute; right: -1px; top: -3px; border: 4px solid transparent; border-left: 5px solid var(--line-2); border-right: 0; }
.node { padding: 8px 12px; border-radius: 4px; border: 1px solid var(--line-2); background: var(--wash); font: 500 13px var(--mono) !important; color: var(--ink) !important; }
.node.llm { background: var(--act-wash) !important; border-color: var(--act-line) !important; color: var(--act-ink) !important; }
.tl { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; position: relative; }
.tl::before { content: ""; position: absolute; left: 0; right: 0; top: 9px; height: 2px; background: var(--line); }
.tl li { position: relative; padding: 28px 12px 0 0; }
.tl li::before { content: ""; position: absolute; left: 0; top: 4px; width: 12px; height: 12px; border-radius: 3px; background: var(--a2); }
.tl li:last-child::before { background: var(--act); }
.tl code { font: 500 12px var(--mono); color: var(--act-ink); }
.tl b { display: block; margin-top: 4px; font-size: 15px; font-weight: 500; color: var(--ink); }
.tl span { display: block; margin-top: 4px; font-size: 13.5px; line-height: 1.45; color: var(--muted); }
.arch { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.arch .col { display: grid; gap: 10px; align-content: start; }
.arch .box { padding: 12px 14px; border: 1px solid var(--line); border-radius: 6px; background: var(--wash); }
.arch .box.hot { background: var(--act-wash); border-color: var(--act-line); }
.arch .box b { display: block; font-size: 15px; font-weight: 500; color: var(--ink); }
.arch .box span { display: block; margin-top: 4px; font-size: 13px; line-height: 1.45; color: var(--muted); }
.arch code { font-size: 12px; }
.tour { border-collapse: separate; border-spacing: 4px; margin: 0 auto; font: 500 13px var(--mono); }
.tour th { width: 40px; height: 32px; color: var(--muted); font-weight: 500; }
.tour td { width: 40px; height: 32px; text-align: center; border-radius: 4px; background: var(--wash); color: var(--line-2); }
.tour td.w { background: var(--a1); color: var(--act-ink); }
.tour td.x { background: transparent; }
.tour td.n { background: transparent; color: var(--ink); font-size: 15px; }
.tour tr.top td.w { background: var(--act); color: #fff; }
.tour tr.top th, .tour tr.top td.n { color: var(--ink); background: var(--yellow); border-radius: 4px; }
.steps { margin: 18px 0 0; padding: 0; list-style: none; counter-reset: s; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.steps li { counter-increment: s; padding: 12px 14px; border: 1px solid var(--line); border-radius: 6px; font-size: 14px; line-height: 1.45; color: var(--ink-2); }
.steps li::before { content: "0" counter(s); display: block; margin-bottom: 6px; font: 500 12px var(--mono); color: var(--act-ink); }
.lessons { margin: 20px 0 0; padding: 0; list-style: none; counter-reset: l; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lessons li { counter-increment: l; display: flex; gap: 16px; padding: 16px 18px; background: var(--bg); }
.lessons li::before { content: "0" counter(l); font: 400 22px/1.2 var(--pixel); color: var(--act); }
.broke li { background: var(--bg); }
.feat li::before { background: var(--act); }
.two .tall img { max-height: 460px; }
@media (max-width: 720px) { .tl { grid-template-columns: 1fr; } .tl::before { left: 5px; right: auto; top: 0; bottom: 0; width: 2px; height: auto; } .tl li { padding: 0 0 16px 26px; } .tl li::before { top: 4px; }
  .arch { grid-template-columns: 1fr; } .steps { grid-template-columns: 1fr 1fr; } article h2 { flex-direction: column; gap: 4px; } .tour th, .tour td { width: 30px; height: 28px; } }
pre code { color: inherit !important; font: inherit !important; }
article > p.lede { margin-top: 16px !important; }
article > h2:first-child { margin-top: 0; }
/* v5: the short version tiles, plain-words boxes, walk-throughs and videos */
.short { margin-top: 48px; }
.tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 14px; }
.tile { border: 1px solid var(--line); border-radius: 8px; background: var(--bg); overflow: hidden; box-shadow: var(--sh-1); }
.pix { display: grid; grid-template-columns: repeat(var(--cols), 1fr); gap: 3px; padding: 14px; background: var(--wash); border-bottom: 1px solid var(--line); }
.pix i { aspect-ratio: 1; border-radius: 1.5px; }
.pix .p0 { background: transparent; } .pix .p1 { background: var(--a1); } .pix .p2 { background: var(--a2); } .pix .p3 { background: var(--a3); } .pix .p4 { background: var(--a4); }
.pix .pk { background: var(--yellow); box-shadow: 0 0 0 1.5px var(--pick-line); }
.tile b { display: block; padding: 16px 18px 0; font: 400 28px/1.1 var(--pixel); color: var(--ink); letter-spacing: -.01em; }
.tile p { margin: 8px 0 0; padding: 0 18px 18px; font-size: 15px; line-height: 1.5; color: var(--body); }
.plain { margin: 28px 0 0; padding: 16px 20px; border-radius: 8px; border: 1px dashed var(--act-line); background: var(--act-wash); }
.plain .lbl { color: var(--act-ink); }
.plain p:last-child { margin: 6px 0 0; font-size: 16px; color: var(--ink-2); }
.walk { margin: 22px 0 0; padding: 0; list-style: none; counter-reset: w; }
.walk li { counter-increment: w; position: relative; padding: 0 0 18px 44px; }
.walk li::before { content: counter(w); position: absolute; left: 0; top: 1px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: var(--bg); font: 500 13px var(--mono); }
.walk li:not(:last-child)::after { content: ""; position: absolute; left: 13.5px; top: 32px; bottom: 4px; width: 1px; background: var(--line-2); }
.fig.vid .fig-box { position: relative; background: #f7f5f0; }
.fig.vid video { display: block; width: 100%; height: auto; aspect-ratio: 1200 / 676; }
.vtag { position: absolute; right: 12px; top: 12px; padding: 4px 8px; border-radius: 4px; background: rgba(14,14,16,.82); color: #fff; font: 500 12px var(--mono); }
.hero h1 { max-width: 14ch; }
@media (max-width: 960px) { .tiles { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .tiles { grid-template-columns: 1fr; } .walk li { padding-left: 40px; } }
/* live page */
.prog { width: 0; transition: width .1s linear; }
.rel-all { margin: 24px 0 0; font-size: 15px; }
.rel-all .ar { width: 14px; height: 14px; vertical-align: -2px; }
.acts .ghost[data-copy-md] { cursor: pointer; }
@media (prefers-reduced-motion: reduce) { .prog { transition: none; } }
/* v6: laid out like an engineering article. Wide hero, a sticky details-and-contents column on the left,
   one calm reading column on the right, parts that open with a rule and large type, figures and tables
   with mono labels and thin rules instead of boxes. Type and colours are unchanged. */
:root { --faint: #9b99a1; --rule: var(--ink); --dot: var(--line-2); }
.in { max-width: 1280px; padding-inline: 40px; }
.hero { padding-top: 64px; }
.hero h1 { margin-top: 28px; max-width: 11ch; font: 300 clamp(48px, 8.2vw, 112px)/.98 var(--sans); letter-spacing: -.045em; }
.deck { margin-top: 32px; max-width: 38em; font-size: 22px; line-height: 1.5; }
.cover { margin-top: 56px; }
.art { height: 440px; border-radius: 6px; }
.on-art { left: 24px; bottom: 20px; }

.body { grid-template-columns: 320px minmax(0, 720px); gap: 120px; justify-content: start; margin-top: 96px; }
.side { position: sticky; top: 88px; align-self: start; max-height: calc(100vh - 108px); overflow-y: auto; scrollbar-width: none; padding-bottom: 24px; }
.side::-webkit-scrollbar { display: none; }
.side-h { display: flex; justify-content: space-between; margin: 0; padding-bottom: 10px; border-bottom: 1px solid var(--rule);
  font: 500 12px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink); }
.facts { margin: 0; }
.facts > div { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 12px; padding: 11px 0; border-bottom: 1px dotted var(--dot); align-items: baseline; }
.facts dt { font: 400 11.5px/1.6 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: 0; display: flex; flex-wrap: wrap; gap: 5px; font: 400 12.5px/1.6 var(--mono); letter-spacing: .03em; color: var(--ink); }
.facts dd a { color: var(--act-ink); }
.chip { padding: 0 6px; border: 1px solid var(--line); border-radius: 3px; background: var(--wash); }
.side .acts { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 44px; }
.side .ghost { padding: 7px 14px; border: 1px solid var(--ink); border-radius: 999px; color: var(--ink); font: 400 14px/1.2 var(--sans); }
.side .ghost:hover { background: var(--ink); color: var(--bg); }
.side .share { width: 100%; margin: 6px 0 0; font: 400 12px var(--mono); letter-spacing: .03em; color: var(--muted); }
.side .share a { margin: 0; color: var(--ink); }
.side ol { list-style: none; margin: 0; padding: 0; max-height: none; overflow: visible; }
.toc-part { display: flex; gap: 10px; padding: 22px 0 8px; font: 500 11.5px/1.3 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink); }
.toc-part span { color: var(--act-ink); }
.side ol a { display: flex; gap: 12px; padding: 7px 0; border-bottom: 1px dotted var(--dot); font-size: 14px; font-weight: 400; color: var(--muted); }
.side ol a code { font: 400 12px/1.75 var(--mono); color: var(--faint); }
.side ol a:hover { color: var(--ink); }
.side ol a[aria-current] { color: var(--ink); font-weight: 500; }
.side ol a[aria-current] code { color: var(--act); }

article { max-width: 720px; font-size: 19px; line-height: 1.7; }
article > p { margin: 22px 0 0; }
.lede { font-size: 23px; line-height: 1.5; }
.glance { margin: 0; }
.glance-h { margin: 0; padding-bottom: 10px; font: 500 12px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink); }
.nums { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--rule); }
.nums div { padding: 18px 16px 0 0; }
.nums div + div { padding-left: 16px; border-left: 1px dotted var(--dot); }
.nums b { display: block; font: 300 44px/1 var(--sans); letter-spacing: -.04em; color: var(--ink); font-feature-settings: "tnum"; }
.nums span { display: block; margin-top: 12px; font: 400 11.5px/1.45 var(--mono); letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }

.part { margin-top: 136px; padding-top: 16px; border-top: 1px solid var(--rule); scroll-margin-top: 84px; }
.glance + .part { margin-top: 104px; }
.part-n { display: flex; justify-content: space-between; margin: 0; font: 500 12px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.part-n span:first-child { color: var(--act-ink); }
.part h2 { display: block; margin: 44px 0 0; font: 300 clamp(44px, 5.2vw, 68px)/1 var(--sans); letter-spacing: -.045em; color: var(--ink); }
.part-d { margin: 18px 0 0; max-width: 30em; font-size: 20px; line-height: 1.5; color: var(--muted); }
article h3 { display: flex; align-items: baseline; gap: 14px; margin: 96px 0 0; font: 300 36px/1.12 var(--sans); letter-spacing: -.028em; color: var(--ink); scroll-margin-top: 84px; }
article h3 code { font: 500 13px var(--mono); letter-spacing: 0; color: var(--act-ink); background: none; border: 0; padding: 0; }
.part + h3 { margin-top: 72px; }
article h3 + p { margin-top: 20px; }

.fig { margin: 48px 0 0; }
.fig-box { border-radius: 6px; box-shadow: var(--sh-1); }
.fig figcaption { display: block; margin-top: 14px; font-size: 15px; line-height: 1.5; }
.fig .fig-n { display: inline; margin-right: 12px; font: 500 11.5px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink); }
.fig.phone { max-width: 380px; }
.fig.phone .fig-box { border-radius: 18px; }

.tbl { margin-top: 36px; border: 0; border-radius: 0; border-top: 1px solid var(--rule); }
.tbl table { font-size: 16px; }
.tbl th { padding: 12px 18px 12px 0; background: none; font: 500 11.5px var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--rule); }
.tbl td { padding: 14px 18px 14px 0; border-bottom: 1px dotted var(--dot); }
.tbl tr:last-child td { border-bottom: 1px dotted var(--dot); }
.tbl td:first-child { font-weight: 400; }
.tbl.num tr:last-child td { background: none; color: var(--act-ink); }

.plain, .note { margin: 40px 0 0; padding: 4px 0 4px 22px; border: 0; border-left: 2px solid var(--act); border-radius: 0; background: none; }
.note { border-left-color: var(--ink); }
.plain .lbl, .note .lbl { font: 500 11.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--act-ink); }
.note .lbl { color: var(--ink); }
.plain p:last-child, .note p:last-child { margin: 10px 0 0; font-size: 17px; line-height: 1.6; color: var(--ink-2); }

.feat { gap: 16px; margin-top: 24px; }
.feat li { padding-left: 24px; }
.feat li::before { top: .7em; width: 7px; height: 7px; border-radius: 1px; }
.walk { margin-top: 28px; }
.walk li { padding-bottom: 22px; }
.steps { margin-top: 28px; gap: 0; border-top: 1px solid var(--rule); }
.steps li { padding: 14px 16px 4px 0; border: 0; border-radius: 0; font-size: 15px; }
.steps li + li { padding-left: 16px; border-left: 1px dotted var(--dot); }
.broke { gap: 0; margin-top: 28px; border-top: 1px solid var(--rule); }
.broke li { padding: 18px 0 18px 52px; border: 0; border-bottom: 1px dotted var(--dot); border-radius: 0; background: none; }
.broke li::before { left: 0; top: 20px; }
.lessons { margin-top: 28px; gap: 0; background: none; border: 0; border-top: 1px solid var(--rule); border-radius: 0; }
.lessons li { padding: 18px 0; border-bottom: 1px dotted var(--dot); background: none; }
.small { margin-top: 14px !important; font-size: 14.5px; }

.cta { margin-top: 120px; border-radius: 6px; }
.author { margin-top: 72px; padding-top: 16px; border-top: 1px solid var(--rule); }
.res { padding-top: 16px; border-top: 1px solid var(--rule); }
.author .lbl, .res .lbl, .related .lbl { font: 500 12px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink); }
.res li a { border-bottom: 1px dotted var(--dot); width: 100%; padding: 10px 0; }
.related { margin-top: 136px; padding-top: 16px; border-top: 1px solid var(--rule); }

@media (max-width: 1100px) { .body { grid-template-columns: 260px minmax(0, 1fr); gap: 64px; } }
@media (max-width: 960px) {
  .body { grid-template-columns: minmax(0, 1fr); gap: 0; margin-top: 56px; }
  .toc.side { display: block; position: static; max-height: none; overflow: visible; padding-bottom: 0; }
  .side ol, .side-h:not(:first-child) { display: none; }
  .side .acts { margin-bottom: 56px; }
}
@media (max-width: 720px) {
  .in { padding-inline: 20px; }
  .hero { padding-top: 36px; } .hero h1 { font-size: 48px; } .deck { font-size: 18px; margin-top: 22px; }
  .cover { margin-top: 36px; } .art { height: 240px; }
  article { font-size: 17px; } .lede { font-size: 20px; }
  .nums { grid-template-columns: 1fr 1fr; } .nums div:nth-child(3) { padding-left: 0; border-left: 0; } .nums div:nth-child(n+3) { padding-top: 22px; }
  .nums b { font-size: 36px; }
  .part { margin-top: 96px; } .part h2 { font-size: 42px; margin-top: 28px; } .part-d { font-size: 17px; }
  .part-n span:last-child { display: none; }
  article h3 { flex-direction: column; gap: 6px; margin-top: 72px; font-size: 28px; }
  .steps { grid-template-columns: 1fr 1fr; } .steps li:nth-child(3) { padding-left: 0; border-left: 0; }
  .facts > div { grid-template-columns: 104px minmax(0, 1fr); }
}

/* v6.1: details scroll away, contents stay pinned */
.side { position: static; align-self: stretch; max-height: none; overflow: visible; padding-bottom: 0; }
.toc-box { position: sticky; top: 88px; max-height: calc(100vh - 108px); overflow-y: auto; scrollbar-width: none; padding-bottom: 24px; }
.toc-box::-webkit-scrollbar { display: none; }
.side .share { display: block; }
.side .share a { display: inline; margin: 0 2px; }
@media (max-width: 960px) {
  .toc-box { display: none; }
}
@media (max-width: 720px) {
  article table { font-size: 15px; }
  article table td, article table th { padding-right: 12px; }
}