:root {
  --paper: #FBFBF8;
  --ink: #1C2530;
  --ink-soft: #55616E;
  --rule: #D9DDD8;
  --verify: #1E7A55;
  --verify-bg: #EAF4EE;
  --caveat: #A66A1E;
  --caveat-bg: #F7EFE2;
  --scope: #4A5B76;
  --scope-bg: #EBEFF5;
  --max: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; }

h1, h2, h3, .display {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 650;
  line-height: 1.12;
  letter-spacing: -0.015em;
}

a { color: inherit; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--verify);
  outline-offset: 3px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.nav {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 20px 0;
  flex-wrap: wrap; gap: 12px;
}
.brand {
  font-family: "Archivo", sans-serif;
  font-weight: 700; font-size: 20px; letter-spacing: 0.06em;
  text-decoration: none;
}
.brand span { color: var(--verify); }
.nav-links { display: flex; gap: 22px; flex-wrap: wrap; }
.nav-links a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px; letter-spacing: 0.04em;
  text-decoration: none; color: var(--ink-soft);
  padding: 2px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--ink); border-bottom-color: var(--rule); }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--verify); }

/* hamburger toggle */
.nav-toggle {
  display: none; background: none; border: 1px solid var(--rule);
  border-radius: 4px; padding: 6px 10px; cursor: pointer;
  font-size: 20px; line-height: 1; color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
}

/* skip link */
.skip-link {
  position: absolute; left: -9999px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; top: 0; left: 0;
  width: auto; height: auto; padding: 8px 16px;
  background: var(--ink); color: var(--paper); z-index: 9999;
  font-family: "IBM Plex Mono", monospace; font-size: 13px;
}

/* table overflow wrapper */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ---------- chips: the tag system ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px; letter-spacing: 0.05em;
  padding: 3px 9px; border-radius: 3px;
  white-space: nowrap; vertical-align: middle;
}
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; }
.chip.measured { color: #196A49; background: var(--verify-bg); }
.chip.measured::before { background: var(--verify); }
.chip.progress { color: var(--caveat); background: var(--caveat-bg); }
.chip.progress::before { background: var(--caveat); }
.chip.scoped { color: #3B4D65; background: var(--scope-bg); }
.chip.scoped::before { background: var(--scope); }

/* ---------- hero ---------- */
.hero { padding: 72px 0 56px; }
.hero .eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px; letter-spacing: 0.14em; color: var(--ink-soft);
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(34px, 5.2vw, 58px);
  max-width: 17ch;
  margin-bottom: 26px;
}
.hero .lede {
  font-size: 19px; max-width: 58ch; color: var(--ink-soft);
  margin-bottom: 34px;
}
.factline {
  display: flex; flex-wrap: wrap; gap: 10px 14px;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

/* ---------- sections ---------- */
section { padding: 56px 0; }
section + section { border-top: 1px solid var(--rule); }
.kicker {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px; letter-spacing: 0.14em; color: var(--ink-soft);
  text-transform: uppercase;
  margin-bottom: 14px;
}
h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 18px; max-width: 24ch; }
h3 { font-size: 20px; margin: 26px 0 8px; }
p + p { margin-top: 14px; }
.measure { max-width: 66ch; }
.soft { color: var(--ink-soft); }

/* ---------- service cards ---------- */
.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 34px; }
.card {
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 26px 24px 22px;
  background: #fff;
  display: flex; flex-direction: column; gap: 12px;
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--ink-soft); transform: translateY(-2px); }
.card .tab {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px; letter-spacing: 0.12em; color: var(--ink-soft);
}
.card h3 { margin: 0; font-size: 24px; }
.card p { font-size: 15.5px; color: var(--ink-soft); flex-grow: 1; }
.card .go {
  font-family: "IBM Plex Mono", monospace; font-size: 13px;
  color: var(--verify);
}

/* ---------- method strip ---------- */
.method { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 30px; }
.step { border-top: 3px solid var(--ink); padding-top: 14px; }
.step .n { font-family: "IBM Plex Mono", monospace; font-size: 12px; color: var(--ink-soft); letter-spacing: 0.1em; }
.step h3 { font-size: 17px; margin: 6px 0 6px; }
.step p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- report table ---------- */
table.report {
  width: 100%; border-collapse: collapse; margin-top: 24px;
  font-size: 14.5px; background: #fff;
  border: 1px solid var(--rule);
}
table.report caption {
  caption-side: top; text-align: left;
  font-family: "IBM Plex Mono", monospace; font-size: 12.5px;
  letter-spacing: 0.06em; color: var(--ink-soft);
  padding: 10px 14px; border: 1px solid var(--rule); border-bottom: none;
  background: var(--paper);
}
table.report th, table.report td {
  text-align: left; padding: 11px 14px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
table.report th {
  font-family: "IBM Plex Mono", monospace; font-size: 12px;
  letter-spacing: 0.08em; color: var(--ink-soft); font-weight: 500;
  text-transform: uppercase;
}
table.report tr:last-child td { border-bottom: none; }
/* Row headers (model names on /results) read as body text, not as column labels. */
table.report tbody th {
  font-family: "Source Serif 4", Georgia, serif; font-size: 14.5px;
  letter-spacing: 0; text-transform: none; color: var(--ink); font-weight: 400;
}
table.report tr:last-child th { border-bottom: none; }

/* ---------- principle list ---------- */
.principles { margin-top: 26px; display: grid; gap: 0; }
.principle {
  display: grid; grid-template-columns: 34px 1fr; gap: 16px;
  padding: 18px 0; border-top: 1px solid var(--rule);
}
.principle:last-child { border-bottom: 1px solid var(--rule); }
.principle .mark {
  font-family: "IBM Plex Mono", monospace; color: var(--verify);
  font-size: 15px; padding-top: 2px;
}
.principle p { font-size: 15.5px; }
.principle strong { font-family: "Archivo", sans-serif; font-weight: 650; }

/* ---------- legs (assess) / zones (deploy) ---------- */
.legs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 30px; }
.leg {
  border: 1px solid var(--rule); border-radius: 6px; background: #fff;
  padding: 24px 22px;
}
.leg h3 { margin-top: 0; font-size: 19px; }
.leg p { font-size: 15px; color: var(--ink-soft); }

/* ---------- CTA / contact ---------- */
.cta {
  background: var(--ink); color: var(--paper);
  border-radius: 8px; padding: 44px 40px; margin: 20px 0 8px;
}
.cta h2 { color: var(--paper); }
.cta p { color: #B9C2CC; max-width: 60ch; }
.btn {
  display: inline-block; margin-top: 22px;
  font-family: "IBM Plex Mono", monospace; font-size: 14px;
  letter-spacing: 0.05em;
  background: var(--verify); color: #fff;
  padding: 12px 22px; border-radius: 4px; text-decoration: none;
}
.btn:hover { background: #16603f; }

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--rule);
  padding: 26px 0 40px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px; color: var(--ink-soft);
  display: block;
}
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .services, .legs { grid-template-columns: 1fr; }
  .method { grid-template-columns: 1fr 1fr; }
  .hero { padding: 48px 0 40px; }
  section { padding: 44px 0; }
  .cta { padding: 32px 24px; }
  .nav-links a {
    padding: 10px 12px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; flex-direction: column; width: 100%; gap: 0; }
  .nav-links.open { display: flex; }
}
@media (max-width: 520px) {
  .method { grid-template-columns: 1fr; }
  body { font-size: 16px; }
}