/* Tallgeese developer site. Same fonts and colour tokens as the Tallgeese app: warm ink and paper,
   ink for actions, red only for danger, gold only for attention. No scripts, no web fonts.
   Diagrams are plain HTML so they show everywhere. */
:root {
  --font-ui: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;
  --bg: #FBF8F7;
  --surface: #FFFFFF;
  --sunken: #F4EFEE;
  --border: #E0D9D7;
  --border-control: #846E68;
  --text: #231815;
  --text-muted: #846E68;
  --primary: #231815;
  --on-primary: #FFFFFF;
  --danger: #C82928;
  --danger-tint: #FBEAEA;
  --success: #268345;
  --success-tint: #EBF9F0;
  --attention-fill: #ECAE33;
  --attention-text: #97690E;
  --attention-tint: #FBF5E9;
  --tile-sand: #EFE7DC;
  --tile-sage: #E2ECDF;
  --tile-sky: #DEE9F2;
  --tile-plum: #EBE2EF;
  --tile-teal: #DAECEA;
  --tile-slate: #E6E6EC;
  --code-bg: #231815;
  --code-bar: #31221E;
  --code-ink: #F6F0EE;
  --code-dim: #9D8882;
  --radius-lg: 16px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-1: 0 1px 2px rgb(35 24 21 / 0.06);
  --shadow-2: 0 2px 6px -2px rgb(35 24 21 / 0.10), 0 6px 20px -8px rgb(35 24 21 / 0.10);
  --shadow-3: 0 10px 30px -10px rgb(35 24 21 / 0.24), 0 30px 70px -30px rgb(35 24 21 / 0.30);
  --tint-1: color-mix(in srgb, var(--primary) 5%, transparent);
  --tint-2: color-mix(in srgb, var(--primary) 9%, transparent);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #231815;
    --surface: #31221E;
    --sunken: #291D1A;
    --border: #574642;
    --border-control: #9D8882;
    --text: #F6F0EE;
    --text-muted: #9D8882;
    --primary: #F6F0EE;
    --on-primary: #231815;
    --danger: #E06564;
    --danger-tint: #3D2323;
    --success: #359F58;
    --success-tint: #1F2D22;
    --attention-text: #ECAE33;
    --attention-tint: #3A2E1A;
    --tile-sand: #4A3B2E;
    --tile-sage: #33412F;
    --tile-sky: #2D3C49;
    --tile-plum: #41334B;
    --tile-teal: #2A4140;
    --tile-slate: #3B3B44;
    --code-bg: #1A110F;
    --code-bar: #291D1A;
    --shadow-1: 0 1px 2px rgb(0 0 0 / 0.3);
    --shadow-2: 0 2px 6px -2px rgb(0 0 0 / 0.4), 0 6px 20px -8px rgb(0 0 0 / 0.4);
    --shadow-3: 0 10px 30px -10px rgb(0 0 0 / 0.6), 0 30px 70px -30px rgb(0 0 0 / 0.6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16.5px/1.7 var(--font-ui); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
::selection { background: color-mix(in srgb, var(--attention-fill) 45%, transparent); color: var(--text); }
img { max-width: 100%; }
a { color: var(--text); text-decoration: underline; text-decoration-color: var(--border-control); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--text); }
:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; border-radius: 4px; }

.logo-dark { display: none !important; }
@media (prefers-color-scheme: dark) {
  .logo-light { display: none !important; }
  .logo-dark { display: block !important; }
}

/* ---------- Top bar ---------- */
.top { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 82%, transparent); -webkit-backdrop-filter: saturate(180%) blur(18px); backdrop-filter: saturate(180%) blur(18px); border-bottom: 1px solid var(--border); }
.top-in { max-width: 1200px; margin: 0 auto; padding: 0 28px; height: 64px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 14px; color: var(--text); text-decoration: none; }
.brand img { height: 26px; width: auto; display: block; }
.brand .tag { font-size: 12.5px; font-weight: 600; letter-spacing: .04em; color: var(--text-muted); padding: 3px 10px; border-radius: 999px; background: var(--sunken); border: 1px solid var(--border); }
.nav { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.nav a { color: var(--text-muted); font-size: 14.5px; font-weight: 550; padding: 7px 14px; border-radius: var(--radius-sm); text-decoration: none; }
.nav a:hover { color: var(--text); background: var(--tint-2); }
.nav a[aria-current="page"] { color: var(--text); background: var(--tint-2); }
.nav a.cta { background: var(--primary); color: var(--on-primary); margin-left: 8px; font-weight: 600; }
.nav a.cta:hover { opacity: .88; }

/* ---------- Layout ---------- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 28px; }
.doc { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 64px; padding-top: 44px; padding-bottom: 96px; }
.toc { position: sticky; top: 88px; align-self: start; max-height: calc(100vh - 110px); overflow: auto; font-size: 14px; padding-bottom: 24px; }
.toc h2 { font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 12px 12px; font-weight: 650; }
.toc ol, .toc ul { list-style: none; margin: 0; padding: 0; }
.toc a { display: block; color: var(--text-muted); padding: 5px 12px; border-left: 2px solid var(--border); text-decoration: none; }
.toc a:hover { color: var(--text); border-left-color: var(--primary); background: var(--tint-1); }
.toc ul a { padding-left: 26px; font-size: 13px; }
article { min-width: 0; max-width: 780px; }

/* ---------- Type ---------- */
article h1 { font-size: clamp(34px, 5vw, 50px); line-height: 1.08; letter-spacing: -.03em; margin: 0 0 18px; font-weight: 700; }
article .lede { font-size: 20px; line-height: 1.55; color: var(--text-muted); margin: 0 0 30px; }
article h2 { font-size: 29px; line-height: 1.2; letter-spacing: -.02em; margin: 72px 0 16px; font-weight: 700; }
article h2::before { content: ""; display: block; width: 36px; height: 4px; border-radius: 4px; background: var(--attention-fill); margin-bottom: 18px; }
article h3 { font-size: 20px; margin: 40px 0 8px; font-weight: 650; letter-spacing: -.01em; }
article h4 { font-size: 12.5px; margin: 26px 0 8px; font-weight: 650; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); }
article h4 code { text-transform: none; letter-spacing: 0; }
article p { margin: 0 0 18px; }
article ul, article ol { margin: 0 0 20px; padding-left: 24px; }
article li { margin: 6px 0; }
article li::marker { color: var(--text-muted); }
.eyebrow { display: inline-block; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); font-weight: 650; margin: 0 0 14px; padding: 4px 12px; border-radius: 999px; background: var(--sunken); border: 1px solid var(--border); }

code { font: .875em/1.4 var(--font-mono); background: var(--sunken); border: 1px solid var(--border); color: var(--text); padding: .1em .4em; border-radius: 6px; }
pre { background: var(--code-bg); color: var(--code-ink); border-radius: var(--radius); padding: 18px 20px; overflow: auto; margin: 0 0 24px; font: 13px/1.65 var(--font-mono); tab-size: 2; box-shadow: var(--shadow-2); }
pre code { background: none; border: 0; padding: 0; font: inherit; color: inherit; }
pre[data-file] { padding-top: 0; }
pre[data-file]::before { content: attr(data-file); display: block; margin: 0 -20px 16px; padding: 11px 20px; background: var(--code-bar); font: 600 12px/1 var(--font-ui); color: var(--code-dim); letter-spacing: .02em; }

/* ---------- Tables ---------- */
.table { overflow-x: auto; margin: 0 0 26px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-1); }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.55; }
th, td { text-align: left; vertical-align: top; padding: 12px 16px; border-bottom: 1px solid var(--border); }
th { background: var(--sunken); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); white-space: nowrap; font-weight: 650; }
tr:last-child td { border-bottom: 0; }
td code { white-space: nowrap; }

/* ---------- Callouts ---------- */
.callout { border-radius: var(--radius); padding: 16px 20px 16px 54px; margin: 0 0 24px; background: var(--sunken); border: 1px solid var(--border); font-size: 15.5px; position: relative; }
.callout::before { content: "i"; position: absolute; left: 16px; top: 17px; width: 24px; height: 24px; border-radius: 50%; background: var(--text-muted); color: var(--bg); font: italic 700 14px/24px var(--font-ui); text-align: center; }
.callout > :last-child { margin-bottom: 0; }
.callout strong.t { display: block; margin-bottom: 4px; }
.callout.tip { background: var(--success-tint); border-color: transparent; }
.callout.tip::before { content: "✓"; background: var(--success); color: #fff; font-style: normal; }
.callout.warn { background: var(--attention-tint); border-color: transparent; }
.callout.warn::before { content: "!"; background: var(--attention-fill); color: #231815; font-style: normal; }
.callout.idea { background: var(--tile-sky); border-color: transparent; }
.callout.idea::before { content: "★"; background: var(--text); color: var(--bg); font-style: normal; font-size: 12px; }

.pill { display: inline-block; font-size: 11px; font-weight: 650; padding: 2px 9px; border-radius: 999px; background: var(--sunken); border: 1px solid var(--border); color: var(--text-muted); vertical-align: 1px; white-space: nowrap; letter-spacing: .02em; }
.pill.req { background: var(--text); border-color: transparent; color: var(--bg); }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 0 0 30px; }
.card { display: block; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; background: var(--surface); color: var(--text); text-decoration: none; transition: transform 140ms cubic-bezier(.2,0,.2,1), box-shadow 140ms, border-color 140ms; box-shadow: var(--shadow-1); }
a.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--border-control); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--text-muted); font-size: 15px; line-height: 1.6; }
.card .go { display: inline-block; margin-top: 14px; font-size: 14.5px; font-weight: 600; }
.ico { width: 44px; height: 44px; border-radius: var(--radius); display: grid; place-items: center; font-size: 22px; margin-bottom: 16px; background: var(--tile-sand); }
.ico.sage { background: var(--tile-sage); }
.ico.sky { background: var(--tile-sky); }
.ico.plum { background: var(--tile-plum); }
.ico.teal { background: var(--tile-teal); }
.ico.slate { background: var(--tile-slate); }

/* ---------- Landing ---------- */
.hero { position: relative; overflow: hidden; padding: 104px 0 84px; text-align: center; isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: -20% -10% auto; height: 600px; z-index: -2; background: radial-gradient(520px 320px at 20% 30%, var(--tile-sand), transparent 70%), radial-gradient(520px 340px at 80% 20%, var(--tile-sky), transparent 70%), radial-gradient(480px 300px at 55% 85%, var(--tile-plum), transparent 70%), radial-gradient(380px 260px at 8% 80%, var(--tile-sage), transparent 70%); filter: blur(8px); opacity: .9; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px); background-size: 56px 56px; opacity: .5; -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 70%); mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 70%); }
.hero h1 { font-size: clamp(38px, 7vw, 70px); line-height: 1.04; letter-spacing: -.035em; margin: 0 auto 22px; max-width: 860px; font-weight: 700; }
.mark { background: linear-gradient(transparent 62%, var(--attention-fill) 62% 92%, transparent 92%); padding: 0 .08em; }
.hero p.lede { font-size: clamp(18px, 2.2vw, 22px); max-width: 660px; margin: 0 auto 34px; color: var(--text-muted); line-height: 1.55; }
.btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 24px; border-radius: var(--radius-sm); font-weight: 600; font-size: 15.5px; border: 1px solid var(--border-control); color: var(--text); background: var(--surface); text-decoration: none; transition: transform 140ms, box-shadow 140ms, opacity 140ms; }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.hero .proof { margin-top: 44px; display: flex; gap: 10px 28px; justify-content: center; flex-wrap: wrap; color: var(--text-muted); font-size: 14px; }
.hero .proof span::before { content: "✓ "; color: var(--success); font-weight: 700; }
.section { padding: 76px 0; }
.section.alt { background: var(--sunken); border-block: 1px solid var(--border); }
.section h2 { font-size: clamp(27px, 4vw, 38px); letter-spacing: -.025em; line-height: 1.12; margin: 0 0 12px; font-weight: 700; }
.section .sub { color: var(--text-muted); font-size: 18px; margin: 0 0 40px; max-width: 700px; }
.center { text-align: center; }
.center .sub { margin-inline: auto; }
.ways { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.way { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; display: flex; flex-direction: column; box-shadow: var(--shadow-1); }
.way .who { font-size: 11.5px; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 6px; }
.way h3 { font-size: 20px; margin: 0 0 8px; letter-spacing: -.015em; }
.way p { color: var(--text-muted); font-size: 15px; line-height: 1.6; margin: 0 0 14px; }
.way .meta { margin-top: auto; padding-top: 14px; border-top: 1px dashed var(--border); font-size: 13px; color: var(--text-muted); }
.way .meta b { color: var(--text); font-weight: 600; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 20px; max-width: 760px; }
.steps li { counter-increment: s; position: relative; padding: 2px 0 2px 58px; margin: 0; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 40px; height: 40px; border-radius: var(--radius); background: var(--primary); color: var(--on-primary); font-weight: 700; display: grid; place-items: center; font-size: 17px; }
.steps li strong { display: block; font-size: 17px; margin-bottom: 2px; }
.steps li span { color: var(--text-muted); font-size: 15.5px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.split pre { margin: 0; }

/* ---------- Diagrams ---------- */
.diagram { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; margin: 0 0 8px; background: var(--sunken); }
.flow { display: flex; align-items: stretch; flex-wrap: wrap; }
.node { flex: 1 1 130px; min-width: 120px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; text-align: center; box-shadow: var(--shadow-1); }
.node b { display: block; font-size: 14.5px; line-height: 1.3; }
.node small { display: block; color: var(--text-muted); font-size: 12.5px; line-height: 1.4; margin-top: 3px; }
.node.sand { background: var(--tile-sand); border-color: transparent; }
.node.sage { background: var(--tile-sage); border-color: transparent; }
.node.sky { background: var(--tile-sky); border-color: transparent; }
.node.plum { background: var(--tile-plum); border-color: transparent; }
.node.teal { background: var(--tile-teal); border-color: transparent; }
.link { flex: 0 0 32px; display: grid; place-items: center; color: var(--text-muted); font-size: 20px; font-weight: 700; }
.vlink { text-align: center; color: var(--text-muted); font-size: 13px; line-height: 1.2; padding: 10px 0; }
.vlink::before { content: "↓ "; font-size: 20px; font-weight: 700; }
.panel { border: 1px dashed var(--border-control); border-radius: var(--radius); padding: 16px 18px 18px; }
.panel .cap, .tag-line { font-size: 11.5px; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 12px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > .node { flex: 1 1 140px; }
figcaption { font-size: 13.5px; color: var(--text-muted); margin: 10px 4px 26px; }
figure { margin: 0; }
@media (max-width: 720px) {
  .flow { flex-direction: column; }
  .flow > .link { transform: rotate(90deg); height: 28px; flex: none; }
  .node { flex: none; width: 100%; }
}

/* ---------- Footer ---------- */
.foot { border-top: 1px solid var(--border); padding: 36px 0 52px; color: var(--text-muted); font-size: 13.5px; background: var(--sunken); }
.foot .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.foot img { height: 22px; }
.foot a { color: var(--text-muted); }

@media (max-width: 960px) {
  .doc { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { position: static; max-height: 210px; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 8px; margin-bottom: 30px; background: var(--sunken); }
  .split { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .nav a.cta { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .top-in { padding: 8px 16px; gap: 10px; height: auto; min-height: 58px; flex-wrap: wrap; }
  .brand .tag { display: none; }
  .nav { margin-left: 0; flex-wrap: wrap; }
  .nav a { padding: 5px 10px; font-size: 14px; }
  .wrap { padding: 0 18px; }
  .hero { padding: 60px 0 50px; }
  .section { padding: 56px 0; }
  article h2 { font-size: 25px; }
}
@media print {
  .top, .toc, .foot { display: none; }
  .doc { display: block; padding-top: 0; }
  article { max-width: none; }
  pre { white-space: pre-wrap; }
}

/* ---------- Lessons: short, scannable pages ---------- */
.progress { height: 6px; border-radius: 999px; background: var(--border); overflow: hidden; margin: 0 0 22px; }
.progress i { display: block; height: 100%; border-radius: 999px; background: var(--primary); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; padding: 4px 11px; border-radius: 999px; background: var(--sunken); border: 1px solid var(--border); color: var(--text-muted); }
.chip.sand { background: var(--tile-sand); border-color: transparent; color: var(--text); }
.chip.sage { background: var(--tile-sage); border-color: transparent; color: var(--text); }
.chip.sky { background: var(--tile-sky); border-color: transparent; color: var(--text); }
.chip.plum { background: var(--tile-plum); border-color: transparent; color: var(--text); }
.tldr { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px 24px; margin: 0 0 36px; box-shadow: var(--shadow-1); }
.tldr .cap { font-size: 11.5px; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 10px; }
.tldr ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.tldr li { margin: 0; padding-left: 28px; position: relative; font-size: 16px; line-height: 1.5; }
.tldr li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 20px; height: 20px; border-radius: 50%; background: var(--success-tint); color: var(--success); font-weight: 700; font-size: 12px; display: grid; place-items: center; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 64px 0 0; }
.pager a { display: block; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px 22px; background: var(--surface); text-decoration: none; color: var(--text); box-shadow: var(--shadow-1); transition: transform 140ms, box-shadow 140ms, border-color 140ms; }
.pager a:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--border-control); }
.pager small { display: block; font-size: 11.5px; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 4px; }
.pager b { font-size: 17px; }
.pager .next { text-align: right; background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.pager .next small { color: color-mix(in srgb, var(--on-primary) 70%, transparent); }
.pager .only { grid-column: 2; }
.toc li.done a, .toc a[aria-current="page"] { color: var(--text); font-weight: 650; border-left-color: var(--primary); background: var(--tint-2); }
.toc .n { display: inline-block; width: 20px; color: var(--text-muted); font-weight: 650; font-size: 12.5px; }
.toc .back { margin: 0 0 14px 12px; font-size: 13px; }
article.lesson h2 { margin-top: 56px; }
article.lesson h2:first-of-type { margin-top: 8px; }

/* Learning path (hub) */
.path { list-style: none; padding: 0; margin: 0 0 40px; display: grid; gap: 12px; position: relative; }
.path li { margin: 0; }
.path a { display: grid; grid-template-columns: 48px minmax(0,1fr) auto; gap: 16px; align-items: center; padding: 18px 22px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); text-decoration: none; color: var(--text); box-shadow: var(--shadow-1); transition: transform 140ms, box-shadow 140ms, border-color 140ms; }
.path a:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--border-control); }
.path .num { width: 44px; height: 44px; border-radius: var(--radius); background: var(--primary); color: var(--on-primary); font-weight: 700; font-size: 18px; display: grid; place-items: center; }
.path b { display: block; font-size: 17px; }
.path span.d { display: block; color: var(--text-muted); font-size: 14.5px; line-height: 1.45; margin-top: 2px; }
.path .meta { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
@media (max-width: 600px) { .path a { grid-template-columns: 40px minmax(0,1fr); } .path .meta { grid-column: 1 / -1; justify-content: flex-start; } .pager { grid-template-columns: 1fr; } .pager .only { grid-column: 1; } }

/* Collapsible "go deeper" */
details.deeper { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); margin: 0 0 22px; }
details.deeper > summary { cursor: pointer; list-style: none; padding: 14px 18px; font-weight: 650; display: flex; align-items: center; gap: 10px; }
details.deeper > summary::-webkit-details-marker { display: none; }
details.deeper > summary::before { content: "＋"; width: 22px; height: 22px; border-radius: 50%; background: var(--sunken); display: grid; place-items: center; font-size: 13px; flex: none; }
details.deeper[open] > summary::before { content: "−"; }
details.deeper > div { padding: 0 18px 6px; }

/* Keep the five-step flow on one line when there's room */
.flow { flex-wrap: nowrap; }
.flow .node { min-width: 0; flex: 1 1 0; padding: 12px 8px; }
.flow .node b { font-size: 13.5px; }
.flow .node small { font-size: 11.5px; }
.flow .link { flex: 0 0 20px; font-size: 17px; }
@media (max-width: 720px) { .flow .node { flex: none; width: 100%; } .flow .link { flex: none; } }

.nav a.signin { border: 1px solid var(--border-control); margin-left: 8px; color: var(--text); }
.nav a.signin:hover { background: var(--tint-2); }
.nav a.signin + a.cta { margin-left: 6px; }