:root {
  --ink: #1c1c1b;
  --ink-2: #3b3a37;
  --muted: #6b6a66;
  --paper: #f6f6f4;
  --card: #ffffff;
  --line: #e3e1dc;
  --line-soft: #ecebe7;
  --orange: #FC6401;
  --orange-ink: #b84a00;
  --orange-wash: #fff1e7;
  --pass: #2f6b3f;
  --pass-wash: #e9f3ec;
  --deny: #a33a00;
  --deny-wash: #fdeee4;
  --code-bg: #f1f0ec;
  --display: 'Outfit', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  --body: 'Source Sans 3', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f1f0ec;
    --ink-2: #d2d0ca;
    --muted: #a09e98;
    --paper: #121211;
    --card: #1b1b1a;
    --line: #2e2d2a;
    --line-soft: #252422;
    --orange: #FC6401;
    --orange-ink: #ff9a5c;
    --orange-wash: #2a1a10;
    --pass: #8fd19e;
    --pass-wash: #16271b;
    --deny: #ffab7a;
    --deny-wash: #2c1a10;
    --code-bg: #232321;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--body); padding-inline: 16px; }
a { color: var(--orange-ink); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; border-radius: 4px; }
img { max-width: 100%; }
.wrap { max-width: 1240px; margin: 0 auto; }
.mono { font-family: var(--mono); font-size: 0.88em; overflow-wrap: anywhere; }

/* Header */
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 22px; }
.logo img { display: block; height: 22px; width: auto; }
.logo .on-dark { display: none; }
@media (prefers-color-scheme: dark) { .logo .on-light { display: none; } .logo .on-dark { display: block; } }
.header-link { font: 600 15px/1 var(--body); color: var(--ink); text-decoration: none; }
.header-link:hover { color: var(--orange-ink); }

/* Intro */
.intro { padding-block: 24px 28px; max-width: 820px; }
.eyebrow { font: 600 13px/1 var(--body); letter-spacing: 0.08em; text-transform: uppercase; color: var(--orange-ink); margin: 0 0 14px; }
h1 { font: 700 clamp(30px, 4.4vw, 46px)/1.08 var(--display); letter-spacing: -0.02em; margin: 0 0 16px; text-wrap: balance; }
.lede { font-size: 20px; color: var(--ink-2); margin: 0 0 18px; max-width: 44em; }
details.real { border: 1px solid var(--line); background: var(--card); border-radius: var(--radius); padding: 12px 18px; }
details.real summary { cursor: pointer; font-weight: 600; }
details.real ul { padding-left: 1.2em; margin: 12px 0; }
details.real li { margin-bottom: 6px; }
details.real p { margin: 8px 0 4px; color: var(--muted); font-size: 15px; }

/* Layout */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr); gap: 28px; align-items: start; }
@media (max-width: 960px) { .layout { grid-template-columns: minmax(0, 1fr); } }

/* Steps */
.steps { display: grid; gap: 16px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.step.done { border-color: color-mix(in oklab, var(--pass) 45%, var(--line)); }
.step h2 { font: 600 21px/1.25 var(--display); margin: 0 0 8px; display: flex; align-items: center; gap: 12px; }
.num { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--orange-wash); color: var(--orange-ink); font: 700 15px/1 var(--display); flex: none; }
.step.done .num { background: var(--pass-wash); color: var(--pass); }
.step p { margin: 0 0 10px; color: var(--ink-2); }
.step .hint { font-size: 15px; color: var(--muted); background: var(--paper); border: 1px dashed var(--line); border-radius: 8px; padding: 8px 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
button { font: 600 15px/1 var(--body); border-radius: 999px; padding: 11px 18px; border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--orange); }
button.primary { background: var(--orange); border-color: var(--orange); color: #1c1c1b; }
button.primary:hover:not(:disabled) { background: color-mix(in oklab, var(--orange) 85%, #000); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.busy { position: relative; color: transparent !important; }
button.busy::after { content: ''; position: absolute; inset: 0; margin: auto; width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--muted); border-top-color: transparent; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { button.busy::after { animation: none; } }
button.quiet { background: transparent; }
.restart { text-align: center; margin: 4px 0 0; }

/* Step outputs */
.out:empty { display: none; }
.out { margin-top: 14px; display: grid; gap: 10px; }
.card { border: 1px solid var(--line-soft); background: var(--paper); border-radius: 10px; padding: 12px 14px; font-size: 15px; }
.card h3 { font: 600 15px/1.3 var(--body); margin: 0 0 6px; }
.card.pass { background: var(--pass-wash); border-color: color-mix(in oklab, var(--pass) 30%, transparent); }
.card.deny { background: var(--deny-wash); border-color: color-mix(in oklab, var(--deny) 30%, transparent); }
.card.wait { border-style: dashed; }
.card p { margin: 0 0 6px; }
.card a.go { font-weight: 600; }
.kv { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 4px 14px; margin: 6px 0 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--mono); font-size: 13px; overflow-wrap: anywhere; }
.checks { list-style: none; padding: 0; margin: 6px 0 0; display: grid; gap: 4px; }
.checks li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 6px; font-size: 14px; }
.checks .ok { color: var(--pass); font-weight: 700; }
.checks .no { color: var(--deny); font-weight: 700; }
.checks .saw { color: var(--muted); font-family: var(--mono); font-size: 12px; overflow-wrap: anywhere; }
table.accounts { width: 100%; border-collapse: collapse; font-size: 14px; }
table.accounts th, table.accounts td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line-soft); }
table.accounts td.num-cell { text-align: right; font-family: var(--mono); }
.chain { list-style: none; padding: 0; margin: 6px 0 0; display: grid; gap: 6px; }
.chain li { border-left: 3px solid var(--orange); padding: 2px 0 2px 10px; font-size: 14px; }
.chain .who { font-weight: 600; }
.pill { display: inline-block; font: 600 12px/1 var(--body); padding: 4px 8px; border-radius: 999px; background: var(--line-soft); color: var(--ink-2); margin: 2px 4px 2px 0; }
.pill.cut { text-decoration: line-through; color: var(--deny); background: var(--deny-wash); }
.pill.keep { color: var(--pass); background: var(--pass-wash); }
pre { font: 12.5px/1.5 var(--mono); background: var(--code-bg); border-radius: 8px; padding: 10px 12px; margin: 6px 0 0; overflow: auto; max-height: 360px; white-space: pre-wrap; overflow-wrap: anywhere; }

/* Trace */
.trace { position: sticky; top: 16px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 18px 8px; max-height: calc(100vh - 32px); overflow: auto; }
@media (max-width: 960px) { .trace { position: static; max-height: none; } }
.trace-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.trace h2 { font: 600 19px/1.2 var(--display); margin: 0; }
.stage { margin: 0; font: 600 14px/1 var(--body); color: var(--muted); display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.dot.on { background: var(--pass); }
.dot.wait { background: var(--orange); }
.dot.err { background: var(--deny); }
.facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 3px 12px; margin: 12px 0 0; font-size: 13px; }
.facts:empty { display: none; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-family: var(--mono); font-size: 12px; overflow-wrap: anywhere; }
.events { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }
.events li { border-top: 1px solid var(--line-soft); padding-top: 8px; font-size: 14px; }
.events .row { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.events time { color: var(--muted); font: 12px/1 var(--mono); }
.badge { font: 600 11px/1 var(--body); letter-spacing: 0.04em; text-transform: uppercase; padding: 4px 7px; border-radius: 6px; background: var(--line-soft); color: var(--ink-2); }
.badge.call { background: var(--orange-wash); color: var(--orange-ink); }
.badge.result { background: var(--pass-wash); color: var(--pass); }
.badge.error { background: var(--deny-wash); color: var(--deny); }
.badge.bank { background: var(--ink); color: var(--paper); }
.events .what { font-weight: 600; }
.events .sum { color: var(--ink-2); overflow-wrap: anywhere; }
.events details summary { cursor: pointer; color: var(--muted); font-size: 13px; margin-top: 4px; }
.empty { color: var(--muted); font-size: 14px; }

/* Parties */
.parties { padding-block: 40px 8px; }
.parties h2 { font: 600 24px/1.2 var(--display); margin: 0 0 6px; }
.parties > p { color: var(--ink-2); margin: 0 0 16px; }
.party-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.party { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; font-size: 15px; }
.party h3 { font: 600 16px/1.3 var(--display); margin: 0 0 4px; }
.party p { margin: 0 0 8px; color: var(--ink-2); font-size: 14px; }
.party a { font-family: var(--mono); font-size: 12.5px; overflow-wrap: anywhere; }

.site-footer { border-top: 1px solid var(--line); margin-top: 40px; padding-block: 20px 40px; color: var(--muted); font-size: 13px; }
.site-footer p { margin: 0 0 6px; }

/* The idea, before the steps */
.idea { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 8px 0 14px; }
@media (max-width: 760px) { .idea { grid-template-columns: minmax(0, 1fr); } }
.idea-card { background: var(--card); border: 1px solid var(--line); border-top: 4px solid var(--orange); border-radius: var(--radius); padding: 16px 18px; }
.idea-card h2 { font: 600 19px/1.25 var(--display); margin: 0 0 6px; }
.idea-card p { margin: 0; color: var(--ink-2); font-size: 16px; }
.analogy { font-size: 18px; color: var(--ink-2); font-style: italic; margin: 0 0 18px; }

/* Plain first, the detail on demand */
details.under { margin-top: 12px; }
details.under summary, details.tech summary { cursor: pointer; font-size: 14px; font-weight: 600; color: var(--muted); }
details.under p { font-size: 15px; color: var(--muted); margin: 8px 0 0; }
details.tech { margin-top: 8px; }
details.tech .kv, details.tech pre { margin-top: 8px; }
.plain-checks { list-style: none; padding: 0; margin: 6px 0 0; display: grid; gap: 4px; }
.plain-checks li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 6px; font-size: 15px; }
.plain-checks .ok { color: var(--pass); font-weight: 700; }
.plain-checks .no { color: var(--deny); font-weight: 700; }
.code-check { font: 600 22px/1.2 var(--mono); letter-spacing: 0.08em; background: var(--paper); border: 1px dashed var(--line); border-radius: 8px; padding: 6px 12px; display: inline-block; margin: 2px 0 6px; }
.chain-plain { list-style: none; padding: 0; margin: 6px 0 0; display: grid; gap: 6px; }
.chain-plain li { border-left: 3px solid var(--orange); padding: 2px 0 2px 10px; font-size: 15px; }
.party h3 .tech-name { font: 400 13px/1 var(--body); color: var(--muted); }
/* The idea band runs the page's width; the prose around it keeps a readable measure. */
.intro { max-width: none; }
.intro h1, .intro .lede, .intro .analogy, .intro details.real { max-width: 820px; }

/* The briefing page */
.brief { max-width: 760px; padding-block: 24px 16px; }
.brief h1 { margin-bottom: 8px; }
.brief .lede { margin-bottom: 28px; }
.brief h2 { font: 600 26px/1.25 var(--display); margin: 36px 0 12px; }
.brief h3 { font: 600 21px/1.3 var(--display); margin: 26px 0 8px; }
.brief strong { color: var(--ink); font-weight: 600; }
.brief p, .brief li { font-size: 19px; line-height: 1.65; color: var(--ink-2); }
.brief ul { padding-left: 1.2em; }
.brief li { margin-bottom: 6px; }
.brief .decision { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--orange); border-radius: var(--radius); padding: 4px 24px 12px; margin: 32px 0; }
.brief .decision h2 { margin-top: 18px; }
.brief .decision-text { font: 600 21px/1.45 var(--display); color: var(--ink); }
.brief-cta { margin-top: 36px; }
.button-link { display: inline-block; background: var(--orange); color: #1c1c1b; font: 600 16px/1 var(--body); text-decoration: none; padding: 13px 20px; border-radius: 999px; }
.button-link:hover { color: #1c1c1b; background: color-mix(in oklab, var(--orange) 85%, #000); }
.intro .brief-link { font-weight: 600; }
@media print { .site-header .header-link, .brief-cta { display: none; } }
.lede-2 { font-size: 18px; color: var(--ink-2); margin: 0 0 18px; max-width: 820px; }