:root {
  --bg: #ffffff;
  --bg-2: #f4f2ee;
  --ink: #111111;
  --muted: #555555;
  --line: #bcb7ab;
  --card: #ffffff;
  --accent: #b3123f;
  --link: #0a5aa6;
  --eosin: #d1386a;
  --hema: #5a3e9e;
  --dapi: #2f5fc4;
  --gfp: #1e7a47;
  --phenol: #d9622b;
  --amber: #c99418;
  --term: #1a1a1a;
  --term-ink: #ececec;
  --term-dim: #9a9a9a;
  --s1: #1d3466; --s2: #3d63ad; --s3: #84a4dc; --s4: #c9d6ee;
  --shadow: 0 0 0 0 transparent;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Charter, "Bitstream Charter", Georgia, serif;
  --sans: "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161514;
    --bg-2: #1f1e1c;
    --ink: #ecebe7;
    --muted: #a6a39c;
    --line: #3a3834;
    --card: #161514;
    --accent: #f06a8e;
    --link: #7fb2ec;
    --eosin: #ee6f97;
    --hema: #a690e6;
    --dapi: #7a9cf0;
    --gfp: #5cc98d;
    --phenol: #f08a55;
    --amber: #e3b64a;
    --term: #0e0e0d;
    --s1: #c9d6ee; --s2: #84a4dc; --s3: #4f76c0; --s4: #2c4680;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #161514; --bg-2: #1f1e1c; --ink: #ecebe7; --muted: #a6a39c; --line: #3a3834; --card: #161514;
  --accent: #f06a8e; --link: #7fb2ec; --eosin: #ee6f97; --hema: #a690e6; --dapi: #7a9cf0; --gfp: #5cc98d;
  --phenol: #f08a55; --amber: #e3b64a; --term: #0e0e0d; --s1: #c9d6ee; --s2: #84a4dc; --s3: #4f76c0; --s4: #2c4680; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 19px/1.6 var(--serif);
  overflow-x: hidden;
}

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }

img, svg { display: block; max-width: 100%; }

.wrap { max-width: 1240px; margin: 0 auto; padding: 0 16px; }

code, pre, kbd { font-family: var(--mono); font-size: .82em; }

:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; }

/* Masthead */

.top { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid var(--ink); }
.top .wrap { display: flex; align-items: center; gap: 28px; height: 58px; }

.brand { font: 700 24px/1 var(--serif); letter-spacing: -0.01em; color: var(--ink); text-decoration: none; }
.brand-dot { display: none; }

.top nav { display: flex; gap: 22px; margin-left: auto; font: 14px/1 var(--sans); }
.top nav a { color: var(--ink); text-decoration: none; }
.top nav a:hover, .top nav a[aria-current] { text-decoration: underline; }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 2px;
  font: 600 14px/1 var(--sans); text-decoration: none; white-space: nowrap;
}
.pill-dark { background: var(--ink); color: var(--bg); }
.pill-light { color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.pill:hover { opacity: .85; }

@media (max-width: 760px) {
  .top nav { display: none; }
  .top .pill { margin-left: auto; }
}

/* Article head */

.hero { padding: 56px 0 48px; border-bottom: 1px solid var(--line); }
.cells, .rings { display: none; }

.hero .wrap { display: grid; justify-items: center; gap: 48px; text-align: center; }
.hero .wrap > .rv:first-child { max-width: min(820px, 100%); }

.eyebrow {
  display: inline-block;
  font: 700 13px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent);
}
.eyebrow b { display: none; }

h1 {
  margin: 18px auto 20px;
  max-width: 16em;
  font-size: clamp(36px, 5.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-weight: 600;
}

.grad { font-style: italic; }

.byline { font: 14px/1.5 var(--sans); color: var(--muted); margin: 0 0 28px; }

.lede {
  margin: 0 auto 30px; max-width: 36em;
  font-size: 20px; font-weight: 600; line-height: 1.55;
  text-align: center;
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: center; }

.npm {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 6px 6px 6px 14px; border-radius: 2px;
  background: var(--term); color: var(--term-ink);
  font: 14px/1 var(--mono);
}
.npm span { color: var(--term-dim); }
.npm button { border: 0; border-radius: 2px; padding: 7px 10px; cursor: pointer; background: #333; color: var(--term-ink); font: 600 12px/1 var(--sans); }

.hero-note { margin-top: 14px; font: 14px/1.5 var(--sans); color: var(--muted); }

/* Figures */

figure { margin: 0; }

.bench { width: 100%; max-width: 860px; border: 1px solid var(--line); background: var(--card); padding: 8px; }
.bench svg { width: 100%; height: auto; font-family: var(--sans); }
.bench .lab { font: 700 11px var(--sans); letter-spacing: .1em; fill: var(--muted); }
.bench .box { fill: var(--card); stroke: var(--ink); stroke-width: 1; }
.bench .core { fill: var(--bg-2); stroke: var(--ink); stroke-width: 2; }
.bench .stp { fill: var(--card); stroke: var(--line); }
.bench .ct { font: 700 20px var(--serif); fill: var(--ink); }
.bench .pn { font: 600 13px var(--sans); fill: var(--ink); }
.bench .pf { font: 11px var(--sans); fill: var(--muted); }
.bench .st { font: 12px var(--sans); fill: var(--ink); }
.bench .sn { font: 700 12px var(--sans); fill: var(--accent); }
.bench .you { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.bench .fl { fill: none; stroke-width: 1.5; stroke-dasharray: 3 7; animation: flow 1.8s linear infinite; }
.bench .fl-ink { stroke: var(--ink); }
.bench .fl-dash { stroke: var(--accent); }
.bench .fl-dapi { stroke: var(--dapi); } .bench .sq-dapi { fill: var(--dapi); }
.bench .fl-eosin { stroke: var(--eosin); } .bench .sq-eosin { fill: var(--eosin); }
.bench .fl-gfp { stroke: var(--gfp); } .bench .sq-gfp { fill: var(--gfp); }
.bench .fl-hema { stroke: var(--hema); } .bench .sq-hema { fill: var(--hema); }
.bench .fl-amber { stroke: var(--amber); } .bench .sq-amber { fill: var(--amber); }
.bench .fl-phenol { stroke: var(--phenol); } .bench .sq-phenol { fill: var(--phenol); }
@keyframes flow { to { stroke-dashoffset: -20; } }

figcaption, .caption {
  margin-top: 12px; max-width: 760px;
  font: 14px/1.5 var(--sans); color: var(--ink); text-align: left;
}
figcaption b, .caption b { font-weight: 700; }

.hero figure { width: 100%; max-width: 860px; }

/* Sections */

section { padding: 72px 0; border-bottom: 1px solid var(--line); }

.kicker { margin: 0; font: 700 13px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }

h2 {
  margin: 12px 0 14px;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 600;
  max-width: 22em;
}

h3 { font-weight: 600; }

.sub { color: var(--muted); font-size: 19px; max-width: 36em; margin: 0; }

.intro { text-align: center; }
.intro h2, .intro .sub { margin-left: auto; margin-right: auto; }

/* Session flow, as a figure with panels */

.flow { position: relative; margin-top: 40px; }
.rail { display: none; }

.step {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: start;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
.step:first-of-type { border-top: 0; }

.step .num {
  display: inline-block;
  font: 700 22px/1 var(--sans); color: var(--ink);
  grid-column: 1; grid-row: 1;
}
.step > .rv:first-of-type { grid-column: 1; grid-row: 1; padding-top: 36px; }
.step .screen { grid-column: 2; grid-row: 1; }

.step h3 { margin: 8px 0 10px; font-size: clamp(24px, 2.6vw, 30px); line-height: 1.2; }
.step p { color: var(--ink); margin: 0 0 12px; }
.step .tag { font: 700 12px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--c); }

@media (max-width: 860px) {
  .step { grid-template-columns: 1fr; gap: 20px; }
  .step .screen { grid-column: 1; grid-row: auto; }
}

/* App screens, drawn as figure panels */

.screen { border: 1px solid var(--line); background: var(--card); font: 15px/1.5 var(--sans); }

.screen-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; border-bottom: 1px solid var(--line); font: 12px/1 var(--mono); color: var(--muted); }
.screen-bar i { display: none; }
.screen-bar span { margin-left: 0; }

.screen-body { padding: 18px; }

.q-label { font: 700 11px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.q-title { font: 600 18px/1.3 var(--sans); margin: 8px 0 4px; }
.q-help { color: var(--muted); font-size: 14px; margin: 0 0 12px; }

.opt { display: flex; align-items: center; gap: 12px; padding: 10px 12px; margin-top: 6px; border: 1px solid var(--line); }
.opt .dot { width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid var(--muted); flex: none; }
.opt.pick { border-color: var(--ink); }
.opt.pick .dot { border: 4.5px solid var(--ink); }
.opt .sw { margin-left: auto; width: 28px; height: 10px; background: var(--sw); }
.opt small { color: var(--muted); }

.metric { display: grid; grid-template-columns: 24px 1fr; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.metric:last-of-type { border-bottom: 0; }
.metric b { font: 700 14px/1.4 var(--sans); color: var(--c); }
.metric strong { display: block; font-size: 15px; }
.metric span { color: var(--muted); font-size: 14px; }

.btns { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.btn { padding: 8px 12px; border: 1px solid var(--ink); font: 600 13px/1 var(--sans); }
.btn.go { background: var(--ink); color: var(--bg); }

.micro { position: relative; overflow: hidden; background: #05060f; aspect-ratio: 16 / 10; }
.micro svg { width: 100%; height: 100%; }
.micro .ring { fill: none; stroke: #ffd35c; stroke-width: 1.5; stroke-dasharray: 120; stroke-dashoffset: 120; }
.on .micro .ring { animation: trace 1.2s ease forwards; animation-delay: calc(var(--i) * 70ms + 200ms); }
@keyframes trace { to { stroke-dashoffset: 0; } }
.micro .readout { position: absolute; left: 10px; bottom: 10px; padding: 4px 8px; background: rgb(0 0 0 / 60%); color: #fff; font: 600 12px/1 var(--mono); }

.progress { height: 6px; background: var(--bg-2); overflow: hidden; margin: 10px 0 16px; }
.progress i { display: block; height: 100%; width: 0; background: var(--gfp); }
.on .progress i { animation: fill 3s ease-out forwards; }
@keyframes fill { to { width: 100%; } }

.done-list { list-style: none; margin: 0; padding: 0; font: 14px/1.5 var(--sans); }
.done-list li { display: flex; gap: 10px; padding: 4px 0; }
.done-list li::before { content: "✓"; color: var(--gfp); font-weight: 700; }

/* Field plates */

.strip { margin-top: 40px; }
.strip-track { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 28px 20px; max-width: 1240px; margin: 0 auto; padding: 0 16px; }

.field { color: var(--ink); text-decoration: none; }
.field img { width: 100%; height: auto; aspect-ratio: 1; border: 1px solid var(--line); filter: invert(1) hue-rotate(180deg) contrast(.92); }
.field:hover img { border-color: var(--ink); }
.field span { display: block; margin-top: 8px; font: 13px/1.4 var(--sans); }
.field span::before { content: attr(data-plate) " "; font-weight: 700; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .field img { filter: none; } }
:root[data-theme="dark"] .field img { filter: none; }

/* Rules */

.rules { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 48px; margin-top: 40px; }
@media (max-width: 760px) { .rules { grid-template-columns: 1fr; } }
.rule { padding: 22px 0; border-top: 1px solid var(--ink); }
.rule::after, .rule .ico { display: none; }
.rule h3 { margin: 0 0 8px; font-size: 22px; }
.rule h3::before { content: counter(rule) ". "; counter-increment: rule; color: var(--accent); }
.rules { counter-reset: rule; }
.rule p { margin: 0; }
.rule code { padding: 1px 4px; background: var(--bg-2); }

/* Results */

.numbers { padding: 72px 0; border-bottom: 1px solid var(--line); }
.numbers .sub { color: var(--muted); }

.badge { display: inline-block; margin-left: 10px; padding: 4px 8px; border: 1px solid var(--accent); font: 700 11px/1 var(--sans); letter-spacing: .08em; color: var(--accent); vertical-align: middle; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 36px; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink); }
@media (max-width: 760px) { .stats { grid-template-columns: 1fr; } }
.stat { padding: 20px 20px 18px 0; }
.stat + .stat { padding-left: 20px; border-left: 1px solid var(--line); }
@media (max-width: 760px) { .stat + .stat { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); } }
.stat .big { font: 600 clamp(44px, 5vw, 60px)/1 var(--serif); }
.stat p { margin: 8px 0 0; font: 14px/1.5 var(--sans); color: var(--muted); }

.sources { margin-top: 32px; }
.sb-title { margin: 0 0 10px; font: 700 14px/1.4 var(--sans); }
.sbar { display: flex; gap: 2px; }
.seg { flex: 0 0 calc(var(--n) / 225 * 100% - 2px); min-width: 0; }
.seg span { display: block; font: 700 13px/1 var(--sans); margin-bottom: 6px; white-space: nowrap; }
.seg i { display: block; height: 18px; background: var(--c); transform: scaleX(0); transform-origin: left; transition: transform 1s ease; }
.sources.on .seg i { transform: none; }
.sb-note { margin: 10px 0 0; font: 13px/1.5 var(--sans); color: var(--muted); }
.legend { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 12px; font: 14px/1.5 var(--sans); color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend span::before { content: ""; width: 10px; height: 10px; background: var(--c); }
.legend b { color: var(--ink); }

.fine { margin-top: 24px; font: 14px/1.5 var(--sans); color: var(--muted); max-width: 52em; }

/* Install */

.paths { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 48px; margin-top: 40px; }
@media (max-width: 860px) { .paths { grid-template-columns: 1fr; } }
.paths > * { min-width: 0; }
.path { padding: 24px 0; border-top: 2px solid var(--ink); }
.path h3 { margin: 0 0 6px; font-size: 26px; }
.path > p { color: var(--muted); margin: 0 0 18px; }
.path ol { margin: 0; padding: 0; list-style: none; counter-reset: s; }
.path li { counter-increment: s; position: relative; padding-left: 32px; margin-bottom: 16px; }
.path li::before { content: counter(s) "."; position: absolute; left: 0; top: 0; font: 700 16px/1.6 var(--sans); color: var(--c, var(--accent)); }

.cmd { position: relative; margin-top: 8px; background: var(--term); color: var(--term-ink); }
.cmd pre { margin: 0; padding: 12px 76px 12px 14px; font-size: 14px; overflow-x: auto; }
.cmd .copy { position: absolute; right: 6px; top: 6px; border: 0; padding: 6px 10px; cursor: pointer; background: #333; color: var(--term-ink); font: 600 12px/1 var(--sans); }

.note { margin-top: 22px; font: 14px/1.5 var(--sans); color: var(--muted); }

/* Closing */

.closing { text-align: center; border-bottom: 0; }
.closing h2 { margin-left: auto; margin-right: auto; }
.closing .cta { margin-top: 24px; }

footer { border-top: 2px solid var(--ink); padding: 22px 0 40px; font: 13px/1.5 var(--sans); color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }

/* Reveal */

.rv { opacity: 0; transition: opacity .7s ease; }
.rv.in { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .rv { opacity: 1; }
  .micro .ring { stroke-dashoffset: 0; }
  .progress i { width: 100%; }
  .seg i { transform: none; }
}

/* Example tabs in the session figure */

.ex-tabs {
  position: sticky; top: 58px; z-index: 10;
  display: flex; gap: 0; overflow-x: auto;
  background: var(--bg); border-bottom: 1px solid var(--ink);
  margin-bottom: 8px; scrollbar-width: none;
}
.ex-tabs::-webkit-scrollbar { display: none; }
.ex-tab {
  flex: none; padding: 12px 16px; border: 0; background: none; cursor: pointer;
  font: 600 14px/1 var(--sans); color: var(--muted);
  border-bottom: 3px solid transparent; margin-bottom: -1px;
}
.ex-tab:hover { color: var(--ink); }
.ex-tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }

.flow .ex { display: none; }
.flow[data-ex="imaging"] .ex-imaging,
.flow[data-ex="singlecell"] .ex-singlecell,
.flow[data-ex="msi"] .ex-msi,
.flow[data-ex="neuro"] .ex-neuro { display: block; animation: exin .35s ease; }
@keyframes exin { from { opacity: 0; } }

.micro .cut { stroke: #ececec; stroke-width: 1; stroke-dasharray: 4 4; }
.micro .ax { font: 11px var(--sans); fill: #bbb; }
.micro .trace { fill: none; stroke: #ffd35c; stroke-width: 1.8; stroke-dasharray: 900; stroke-dashoffset: 900; }
.on .micro .trace { animation: trace 1.6s ease forwards; }
.micro .px { opacity: 0; }
.on .micro .px { animation: pxin .5s ease forwards; animation-delay: calc(var(--i) * 25ms); }
@keyframes pxin { to { opacity: .9; } }
@media (prefers-reduced-motion: reduce) { .micro .trace { stroke-dashoffset: 0; } .micro .px { opacity: .9; } }

/* Program atlas */

.atlas { display: grid; grid-template-columns: minmax(220px, 300px) 1fr; gap: 48px; margin-top: 44px; align-items: start; }
@media (max-width: 860px) { .atlas { grid-template-columns: 1fr; gap: 20px; } }

.atlas-index { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--ink); }
.atlas-index li { border-bottom: 1px solid var(--line); }
.atlas-item {
  display: grid; grid-template-columns: 44px 1fr; align-items: baseline; width: 100%;
  padding: 11px 4px; border: 0; background: none; cursor: pointer; text-align: left;
  font: 17px/1.3 var(--serif); color: var(--muted);
  transition: color .2s, padding-left .2s;
}
.atlas-item:hover { color: var(--ink); }
.ai-n { font: 700 12px/1 var(--sans); letter-spacing: .06em; color: var(--muted); }
.ai-count { font: 12px/1 var(--sans); color: var(--muted); }
.atlas-item[aria-pressed="true"] { color: var(--ink); padding-left: 12px; box-shadow: inset 3px 0 0 var(--c); }
.atlas-item[aria-pressed="true"] .ai-n { color: var(--c); }

@media (max-width: 860px) {
  .atlas-index { display: flex; overflow-x: auto; border-top: 0; border-bottom: 1px solid var(--ink); scrollbar-width: none; }
  .atlas-index li { border: 0; flex: none; }
  .atlas-item { display: block; padding: 10px 12px; font: 600 14px/1 var(--sans); }
  .atlas-item .ai-n, .atlas-item .ai-count { display: none; }
  .atlas-item[aria-pressed="true"] { padding-left: 12px; box-shadow: inset 0 -3px 0 var(--c); }
}

.atlas-plate { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); grid-template-rows: auto auto auto 1fr; gap: 0 32px; align-items: start; }
@media (max-width: 700px) { .atlas-plate { grid-template-columns: 1fr; } }
.atlas-img { grid-row: span 4; display: block; border: 1px solid var(--line); }
.atlas-img img { width: 100%; height: auto; filter: invert(1) hue-rotate(180deg) contrast(.92); transition: opacity .25s; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .atlas-img img { filter: none; } }
:root[data-theme="dark"] .atlas-img img { filter: none; }
.atlas-img img.swap { opacity: 0; }
.atlas-plate figcaption { margin-top: 0; font-size: 15px; }
.ap-count { margin: 16px 0 0; font: 13px/1.4 var(--sans); color: var(--muted); }
.atlas-progs { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; align-content: start; }
.atlas-progs li { padding: 5px 10px; border: 1px solid var(--line); font: 13px/1.3 var(--sans); animation: exin .3s ease both; animation-delay: calc(var(--i) * 40ms); }
.atlas-progs li small { color: var(--muted); }
.atlas-more { margin-top: 18px; font: 600 14px/1.4 var(--sans); align-self: start; }

.ex-tabs { margin-left: calc((100% - 48px) / 2.1 + 48px); }
.ex-tabs::before { content: "Example:"; flex: none; align-self: center; padding: 0 8px 0 0; font: 12px/1 var(--sans); color: var(--muted); }
.ex-tab { padding: 12px 10px; font-size: 13px; }
@media (max-width: 860px) { .ex-tabs { margin-left: 0; } }
@media (max-width: 600px) {
  .ex-tabs::before { display: none; }
  .ex-tab { flex: 1 1 auto; padding: 12px 4px; font-size: 12.5px; }
  .step { padding: 28px 0; gap: 16px; }
  .step .num { font-size: 16px; line-height: 16px; color: var(--c); }
  .step > .rv:first-of-type { padding-top: 0; }
  .step .tag { display: block; padding-left: 22px; line-height: 16px; }
  .intro, .intro h2, .intro .sub, .hero-note { text-align: left; }
}

.bench .f1-tall { display: none; }
@media (max-width: 640px) {
  .bench .f1-wide { display: none; }
  .bench .f1-tall { display: block; }
  .bench { padding: 4px; }
}

/* Light and dark switch */

.theme-switch {
  display: inline-flex; align-items: center; gap: 4px; flex: none;
  padding: 0; border: 0; background: none; cursor: pointer; color: var(--muted);
}
.top nav + .theme-switch { margin-left: 0; }
.theme-switch svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.theme-switch i {
  position: relative; width: 34px; height: 18px; border: 1px solid var(--ink); border-radius: 9px;
}
.theme-switch i::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--ink); transition: transform .2s ease;
}
.theme-switch[aria-checked="true"] i::after { transform: translateX(16px); }
.theme-switch:hover { color: var(--ink); }
@media (max-width: 760px) { .theme-switch { margin-left: auto; } .top .pill { margin-left: 0; } }

/* Sources of the known values */

.srcchart { max-width: 860px; font-family: var(--sans); }
.sc-group { margin: 20px 0 6px; padding-bottom: 6px; border-bottom: 1px solid var(--ink); font: 700 13px/1.3 var(--sans); letter-spacing: .06em; text-transform: uppercase; }
.sc-group span { font-weight: 400; letter-spacing: 0; text-transform: none; color: var(--muted); margin-left: 6px; }
.sc-row { display: grid; grid-template-columns: 200px 1fr 40px; grid-template-areas: "label bar n" "note note note"; gap: 2px 14px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.sc-label { grid-area: label; font: 600 15px/1.3 var(--sans); }
.sc-bar { grid-area: bar; height: 14px; }
.sc-bar i { display: block; height: 100%; width: calc(var(--n) / 93 * 100%); background: var(--c); transform: scaleX(0); transform-origin: left; transition: transform 1s ease; }
.sources.on .sc-bar i, .srcfig .sc-bar i { transform: none; }
.sc-n { grid-area: n; font: 700 18px/1 var(--sans); text-align: right; }
.sc-note { grid-area: note; font: 13px/1.45 var(--sans); color: var(--muted); }
@media (max-width: 600px) { .sc-row { grid-template-columns: 1fr 36px; grid-template-areas: "label n" "bar bar" "note note"; } .sc-bar { margin: 4px 0; } }
@media (prefers-reduced-motion: reduce) { .sc-bar i { transform: none; } }

/* Command boxes */

.cmd {
  position: relative; margin-top: 8px;
  background: var(--bg-2); color: var(--ink);
  border: 1px solid var(--line); border-left: 3px solid var(--ink);
}
.cmd pre { margin: 0; padding: 12px 88px 12px 16px; font: 14px/1.6 var(--mono); overflow-x: auto; background: none; color: inherit; }
.cmd .copy, .npm button {
  position: absolute; right: 8px; top: 8px;
  padding: 6px 9px; border: 1px solid var(--line); border-radius: 0;
  background: var(--bg); color: var(--muted); cursor: pointer;
  font: 700 11px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase;
}
.cmd .copy:hover, .npm button:hover { color: var(--ink); border-color: var(--ink); }

.npm {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  padding: 0 84px 0 16px; height: 44px;
  background: var(--bg-2); color: var(--ink);
  border: 1px solid var(--line); border-left: 3px solid var(--ink); border-radius: 0;
  font: 14px/1 var(--mono);
}
.npm span { color: var(--accent); }
.npm button { top: 50%; transform: translateY(-50%); }
.hero .wrap { grid-template-columns: minmax(0, 1fr); }
.npm { box-sizing: border-box; max-width: 100%; min-width: 0; }
.npm code { min-width: 0; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }

/* Donut chart of the sources */

.donutwrap { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; align-items: center; max-width: 820px; }
@media (max-width: 640px) { .donutwrap { grid-template-columns: 1fr; gap: 16px; justify-items: center; } }
.donut { width: 220px; height: 220px; }
.donut .dn { fill: var(--c); stroke: var(--bg); stroke-width: 2; }
.donut .dn-n { font: 600 34px var(--serif); fill: var(--ink); }
.donut .dn-l { font: 12px var(--sans); fill: var(--muted); }
.sources.rv .donut { transform: rotate(-90deg) scale(.9); opacity: 0; transition: transform 1s ease, opacity .6s ease; }
.sources.on .donut { transform: none; opacity: 1; }
.dn-table { width: 100%; border-collapse: collapse; font: 15px/1.4 var(--sans); }
.dn-table td { padding: 10px 0; border-bottom: 1px solid var(--line); }
.dn-table tr:first-child td { border-top: 1px solid var(--ink); }
.dn-table td i { display: inline-block; width: 12px; height: 12px; margin-right: 10px; vertical-align: -1px; background: var(--c); }
.dn-table .num { text-align: right; font-weight: 700; padding-left: 16px; white-space: nowrap; }
.dn-table .dn-pct { font-weight: 400; color: var(--muted); width: 3.5em; }
@media (prefers-reduced-motion: reduce) { .sources.rv .donut { transform: none; opacity: 1; } }

/* Readability audit fixes */

.q-label, .badge, .cmd .copy, .npm button { font-size: 12px; }
.note code, .hero-note code { font-size: .9em; }
.bench .pf, .bench .lab { font-size: 12px; }
.note, .hero-note, figcaption, .caption { max-width: 68ch; }
.hero-note, .note.center { margin-inline: auto; }
.top nav a { padding: 12px 4px; }

@media (max-width: 760px) {
  .theme-switch, .pill, .atlas-item, .atlas-more { min-height: 44px; }
  .theme-switch, .atlas-more { display: inline-flex; align-items: center; }
  .cmd .copy { min-height: 36px; padding: 10px 12px; top: 4px; right: 4px; }
  .npm button { min-height: 36px; padding: 10px 12px; }
  .hero .lede { text-align: left; font-size: 19px; }
}

/* Menu button for the navigation on a phone */

.menu-btn { display: none; flex: none; align-items: center; min-height: 44px; padding: 9px 12px; border: 0; border-radius: 2px; background: none; box-shadow: inset 0 0 0 1px var(--ink); color: var(--ink); font: 600 14px/1 var(--sans); cursor: pointer; }
.menu-btn:focus-visible, .top nav a:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }
@media (max-width: 760px) {
  .menu-btn { display: inline-flex; }
  .top .wrap { position: relative; gap: 10px; }
  .top nav.open { display: flex; flex-direction: column; gap: 0; position: absolute; top: 100%; left: 0; right: 0; margin: 0; padding: 4px 16px 12px; background: var(--bg); border-bottom: 1px solid var(--ink); font-size: 16px; }
  .top nav.open a { padding: 14px 4px; border-top: 1px solid var(--line); }
  .top nav.open a:first-child { border-top: 0; }
}
@media (max-width: 380px) {
  .top .wrap { gap: 8px; }
  .theme-switch svg { display: none; }
  .top .pill { padding: 9px 12px; }
}

/* Center the donut block under the three numbers */
.sources { display: flex; flex-direction: column; align-items: center; text-align: center; }
.donutwrap { margin-inline: auto; text-align: left; }
.sb-note { text-align: center; }