:root {
  --bg: #f6f7f5;
  --surface: #fff;
  --surface-2: #fbfbf9;
  --ink: #0b1316;
  --ink-2: #1f2a30;
  --mute: #52616a;
  --faint: #5f6d75;
  --teal: #0b5f66;
  --teal-soft: #e6f1f0;
  --violet: #6d5bd0;
  --visited: #5947bd;
  --violet-soft: #efedfb;
  --emerald: #15795e;
  --amber: #a96415;
  --rose: #a93640;
  --line: #e1e5e1;
  --instrument: #10191c;
  --instrument-ink: #eaf1f0;
  --instrument-mute: #a9babd;
  --instrument-soft: #d9ebe9;
  --treatment-bright: #40a8aa;
  --control-bright: #a99df0;
  --hit: #e7fbf8;
  --legend: #b6c6c8;
  --warning-soft: #fff8ed;
  --display: "Source Serif 4", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --page: min(1180px, calc(100vw - 56px));
  --reading: 680px;
  color-scheme: light;
  font-synthesis: none;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent calc(50% - .5px), rgba(11, 19, 22, .035) 50%, transparent calc(50% + .5px)),
    var(--bg);
  font: 400 16px/1.6 var(--sans);
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
a { color: inherit; text-underline-offset: .2em; }
a:visited { color: var(--visited); text-decoration-color: var(--violet); }
.button:visited, .nav-cta:visited { color: #fff; }
.brand-link:visited { color: inherit; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 4px; }
::selection { color: var(--ink); background: var(--teal-soft); }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }

.eyebrow, .kicker, .instrument-label, .stage-number, .meta, .metric dt, .signal-chip, .status-label {
  margin: 0;
  color: var(--teal);
  font: 650 12px/1.3 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
h1 {
  margin-bottom: 24px;
  font: italic 450 clamp(48px, 7.4vw, 94px)/.93 var(--display);
  letter-spacing: -.045em;
}
h2 {
  margin-bottom: 20px;
  font: italic 450 clamp(36px, 5vw, 62px)/.98 var(--display);
  letter-spacing: -.035em;
}
h3 {
  margin-bottom: 10px;
  font: 560 clamp(23px, 2.5vw, 31px)/1.08 var(--display);
  letter-spacing: -.02em;
}
p { color: var(--mute); }
.lede { max-width: 600px; font-size: clamp(18px, 2vw, 22px); line-height: 1.5; }
.reading { max-width: var(--reading); }
.fine-print { color: var(--faint); font-size: 13px; }
.mono { font-family: var(--mono); }

.shell, .page-section, .site-footer, .site-nav { width: var(--page); margin-inline: auto; }
.page-section { padding-block: clamp(72px, 10vw, 128px); border-top: 1px solid var(--line); }
.section-intro { max-width: 710px; margin-bottom: clamp(36px, 6vw, 64px); }
.section-intro .eyebrow { margin-bottom: 18px; }

.button, .nav-cta, .text-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 0;
  text-decoration: none;
}
.button, .nav-cta {
  border-radius: 999px;
  padding: 6px 7px 6px 20px;
  color: #fff;
  background: var(--ink);
  box-shadow: 0 10px 30px rgba(11, 19, 22, .12);
  font-weight: 700;
  cursor: pointer;
  transition: background-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.button:hover, .nav-cta:hover { transform: translateY(-1px); background: var(--teal); }
.button-arrow {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  color: var(--ink);
  background: #fff;
}
.button-secondary { color: var(--ink); background: var(--surface); border: 1px solid var(--line); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.text-link { color: var(--teal); font-weight: 750; }

.grid-2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 80px); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-block: 1px solid var(--line); }
.grid-3 > * { padding: 30px; border-right: 1px solid var(--line); }
.grid-3 > *:last-child { border-right: 0; }
.ledger { border-top: 1px solid var(--ink); }
.ledger-row {
  display: grid;
  grid-template-columns: minmax(120px, .45fr) minmax(220px, 1.1fr) minmax(220px, 1fr);
  gap: 28px;
  align-items: start;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.ledger-row p { margin: 0; }
.ledger-row strong { font: 550 24px/1.15 var(--display); }
.grid-2 > .ledger .ledger-row { grid-template-columns: 120px 1fr; }
.grid-2 > .ledger .ledger-row p:last-child { grid-column: 2; }
.number-list { counter-reset: steps; list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.number-list li { counter-increment: steps; display: grid; grid-template-columns: 52px 1fr; gap: 16px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.number-list li::before { content: "0" counter(steps); color: var(--teal); font: 600 12px var(--mono); }
.number-list p { margin: 6px 0 0; }

.callout {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 6vw, 70px);
  border: 1px solid var(--ink);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 12px 12px 0 var(--teal-soft);
}
.callout::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -120px;
  width: 300px;
  height: 300px;
  border: 52px solid var(--violet-soft);
  border-radius: 50%;
  pointer-events: none;
}
.callout > * { position: relative; z-index: 1; }

.table-wrap { overflow-x: auto; border-top: 1px solid var(--ink); }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 18px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 650 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
td { color: var(--mute); }

.reveal { opacity: 1; transform: none; }
.reveal.is-visible { animation: reveal-in .55s ease both; }
@keyframes reveal-in { from { opacity: .2; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (max-width: 900px) {
  :root { --page: min(100% - 44px, 780px); }
  .grid-2 { grid-template-columns: 1fr; }
  .ledger-row { grid-template-columns: 130px 1fr; }
  .ledger-row p:last-child { grid-column: 2; }
}

@media (max-width: 760px) {
  :root { --page: calc(100% - 36px); }
  body { background: var(--bg); }
  h1 { font-size: clamp(45px, 14vw, 64px); }
  h2 { font-size: clamp(35px, 11vw, 48px); }
  .page-section { padding-block: 72px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-3 > * { border-right: 0; border-bottom: 1px solid var(--line); padding-inline: 0; }
  .grid-3 > *:last-child { border-bottom: 0; }
  .ledger-row { grid-template-columns: 1fr; gap: 8px; }
  .ledger-row p:last-child { grid-column: auto; }
  .grid-2 > .ledger .ledger-row { grid-template-columns: 1fr; }
  .grid-2 > .ledger .ledger-row p:last-child { grid-column: auto; }
  .button-row { align-items: stretch; }
  .button-row .button { width: 100%; }
  .button { padding-left: 15px; font-size: 14px; white-space: nowrap; }
  .button .button-arrow { width: 32px; height: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}