:root {
  --ink: #e3ebf1;
  --panel: #eff5f9;
  --panel-2: #d7e2ea;
  --line: #c4d3de;
  --line-2: #a3b6c4;
  --teal: #0e7566;
  --teal-deep: #0a5749;
  --ember: #9c4b27;
  --olive: #54721f;
  --text: #0f1d26;
  --text-2: #42545f;
  --text-3: #566b79;
  --serif: 'Source Serif 4', Georgia, serif;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --background: #e3ebf1;
  --foreground: #0f1d26;
  --card: #eff5f9;
  --card-foreground: #0f1d26;
  --popover: #eff5f9;
  --popover-foreground: #0f1d26;
  --primary: #0e7566;
  --primary-foreground: #ffffff;
  --secondary: #d7e2ea;
  --secondary-foreground: #0f1d26;
  --muted: #d7e2ea;
  --muted-foreground: #566b79;
  --accent: #d7e2ea;
  --accent-foreground: #0f1d26;
  --destructive: #9c4b27;
  --border: #c4d3de;
  --input: #a3b6c4;
  --ring: #0e7566;
  --radius: 0.1875rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--teal); outline-offset: 4px; }
h1, h2, h3, p { margin-top: 0; }
.wrap { width: min(100%, 1240px); margin: 0 auto; padding-inline: var(--gutter); }
.display { font-family: var(--serif); font-weight: 400; letter-spacing: -0.012em; line-height: 1.12; }
.h1 { margin-bottom: 1rem; font-size: clamp(1.875rem, 3.5vw, 2.75rem); }
.h2 { margin-bottom: 0; font-size: clamp(1.5625rem, 2.9vw, 2.25rem); }
.h3 { margin-bottom: 0.85rem; font-size: 1.1875rem; }
.eyebrow, .mono {
  margin: 0 0 0.875rem;
  color: var(--teal);
  font-family: var(--mono);
  font-size: 0.65625rem;
  letter-spacing: 0.16em;
  line-height: 1.4;
  text-transform: uppercase;
}
.mono { margin-bottom: 0.35rem; color: var(--text-3); letter-spacing: 0.12em; }
.muted { color: var(--text-3); }
.lede { max-width: 46ch; margin-bottom: 0; color: var(--text-2); font-size: 0.9375rem; }
.lede-secondary { max-width: 48ch; margin: 0.75rem 0 0; color: var(--text-3); font-size: 0.875rem; }
.small { margin-bottom: 0; color: var(--text-2); font-size: 0.84375rem; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgb(227 235 241 / 90%);
  backdrop-filter: blur(10px);
}
.nav-inner { display: flex; height: 3.875rem; align-items: center; gap: 1.75rem; }
.wordmark { padding-right: 0.5rem; font-family: var(--serif); font-size: 1.1875rem; letter-spacing: 0.22em; line-height: 1; }
.nav-links { display: flex; align-items: center; gap: 1.75rem; color: var(--text-2); font-size: 0.84375rem; }
.nav-links a { transition: color 180ms ease; }
.nav-links a:hover, .nav-links a.active { color: var(--teal); }
.nav-cta { margin-left: auto; }

.button {
  display: inline-flex;
  min-height: 2.375rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 2px;
  padding: 0.6rem 0.875rem;
  font-family: var(--mono);
  font-size: 0.65625rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.1;
  text-transform: uppercase;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}
.button-solid { background: var(--teal); color: white; }
.button-solid:hover { background: var(--teal-deep); }
.button-ghost { border-color: var(--line-2); color: var(--teal); }
.button-ghost:hover { border-color: var(--teal); background: rgb(14 117 102 / 7%); }

.home-hero { border-bottom: 1px solid var(--line); }
.home-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr); }
.hero-column { min-width: 0; padding-block: 3.375rem 2.875rem; }
.hero-column.left { padding-right: clamp(1.25rem, 4vw, 3.375rem); }
.hero-column.right { padding-left: clamp(1.25rem, 4vw, 3.375rem); }
.hero-divider { background: var(--line); }
.hero-column .h1 { max-width: 14ch; }
.hero-column .lede { max-width: 49ch; }
.hero-action { margin: 1.375rem 0 0; }
.figure { margin-top: 1.875rem; }
.wheel { display: block; width: min(100%, 28.75rem); margin-inline: auto; }
.wheel-style, .wheel-sub, .wheel-sector, .wheel-core, .research-fork text, .mini-chart text {
  font-family: var(--mono);
  letter-spacing: 0.045em;
  dominant-baseline: middle;
}
.wheel-style { fill: #16303d; font-size: 7px; }
.wheel-sub { fill: white; font-size: 6.5px; }
.wheel-sector { fill: white; font-size: 7px; font-weight: 500; }
.wheel-core { fill: var(--text-3); font-size: 9px; letter-spacing: 0.15em; }
.levels { margin-top: 1rem; border-top: 1px solid var(--line-2); }
.level-row { display: grid; grid-template-columns: 1.625rem 1fr auto; align-items: baseline; gap: 0.75rem; border-bottom: 1px solid var(--line); padding: 0.55rem 0; }
.level-row span, .level-row strong, .level-row b { font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.09em; line-height: 1.45; text-transform: uppercase; }
.level-row span { color: var(--text-3); }
.level-row strong { font-weight: 400; }
.level-row b { color: var(--teal); font-weight: 400; white-space: nowrap; }
.style-strip { margin-top: 1rem; border: 1px solid var(--line-2); border-radius: 3px; padding: 0.75rem 0.875rem; }
.style-strip p { margin-bottom: 0.55rem; color: var(--text-3); font-family: var(--mono); font-size: 0.59375rem; letter-spacing: 0.12em; text-transform: uppercase; }
.style-strip ul { display: flex; flex-wrap: wrap; gap: 0.375rem; margin: 0; padding: 0; list-style: none; }
.style-strip li { border: 1px solid var(--line-2); border-radius: 2px; padding: 0.25rem 0.5rem; color: var(--teal); font-family: var(--mono); font-size: 0.59375rem; letter-spacing: 0.055em; text-transform: uppercase; }
.research-fork { display: block; width: min(100%, 25rem); margin: 1.5rem auto 0; }
.research-fork text, .mini-chart text { fill: var(--text); font-size: 9px; }
.research-fork .outline, .research-fork .panel-box { fill: var(--panel); stroke: var(--line-2); }
.research-fork .connector { fill: none; stroke: var(--line-2); stroke-width: 1; }
.research-fork .guide, .mini-chart .guide { stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 4; }
.research-fork .teal-text { fill: var(--teal); }
.research-fork .muted-text, .mini-chart .muted-text { fill: var(--text-3); font-size: 8px; }
.research-fork .rho { fill: var(--teal); font-size: 20px; }
.figcaption { margin: 0.75rem 0 0; color: var(--text-3); font-family: var(--mono); font-size: 0.59375rem; letter-spacing: 0.1em; text-align: center; text-transform: uppercase; }
.claim-band { border-bottom: 1px solid var(--line); background: var(--panel); }
.claim-band .wrap { padding-block: 0.9375rem; color: var(--text-3); font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.18em; text-align: center; text-transform: uppercase; }
.claim-band b { color: var(--teal); font-weight: 400; }

.page-head { padding-block: 4.375rem 0; }
.page-head .h1 { max-width: 21ch; }
.page-lede { max-width: 64ch; font-size: 1rem; }
.section { border-bottom: 1px solid var(--line); padding-block: 5.5rem; }
.first-section { margin-top: 3.5rem; border-top: 1px solid var(--line); }
.compact-section { padding-block: 4.5rem; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 3.5rem; margin-bottom: 3rem; }
.section-head.single { grid-template-columns: 1fr; }
.compact-head { margin-bottom: 2.5rem; }
.section-head .eyebrow, .callout .eyebrow { margin-bottom: 0.6rem; }
.section-head .h2 { max-width: 18ch; }
.two-column { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(2rem, 5vw, 4.5rem); }
.three-column, .workflow-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.375rem; }
.cards-equal { gap: 1.75rem; }
.stack { display: flex; flex-direction: column; align-items: flex-start; gap: 0.875rem; }
.stack > * { margin-top: 0; margin-bottom: 0; }
.narrow { max-width: 51.25rem; }
.library-width { max-width: 61rem; margin-inline: auto; }
.card { border: 1px solid var(--line); border-radius: 3px; background: var(--panel); padding: 1.375rem 1.5rem; box-shadow: 0 1px 2px rgb(15 29 38 / 6%); transition: border-color 180ms ease, box-shadow 180ms ease; }
.card:hover { border-color: var(--line-2); box-shadow: 0 2px 6px rgb(15 29 38 / 9%); }
.card .h3 { max-width: 23ch; }
.featured-card { border-left: 3px solid var(--teal); }
.evaluation-card { border-color: var(--line-2); background: var(--panel-2); }
.evaluation-card .button { margin-top: 1.2rem; }
.workflow-grid .inline-link { margin-top: 1.25rem; }
.inline-link, .publication-link, .email-link, .social-links a { color: var(--teal-deep); transition: color 180ms ease; }
.inline-link { display: inline-block; border-bottom: 1px solid var(--line-2); padding-bottom: 0.12rem; font-family: var(--mono); font-size: 0.65625rem; letter-spacing: 0.065em; text-transform: uppercase; }
.inline-link:hover, .publication-link:hover, .email-link:hover, .social-links a:hover { color: var(--teal); }
.mini-chart { display: block; width: 100%; margin-top: auto; }
.mini-chart .connector { stroke: var(--line-2); stroke-width: 1; }
.mini-chart .white-label { fill: white; font-size: 7px; }

.metrics { display: flex; flex-wrap: wrap; gap: 1.75rem; margin-top: 0.75rem; }
.metrics div { border-left: 1px solid var(--line-2); padding-left: 0.875rem; }
.metrics strong, .metrics span { display: block; font-family: var(--mono); }
.metrics strong { font-size: 1.4375rem; font-weight: 400; }
.metrics span { margin-top: 0.25rem; color: var(--text-3); font-size: 0.59375rem; letter-spacing: 0.1em; text-transform: uppercase; }
.table-wrap { overflow-x: auto; }
.spec { width: 100%; border-collapse: collapse; }
.spec th { border-bottom: 1px solid var(--line-2); padding: 0 1rem 0.625rem 0; color: var(--text-3); font-family: var(--mono); font-size: 0.59375rem; font-weight: 400; letter-spacing: 0.12em; text-align: left; text-transform: uppercase; }
.spec td { border-bottom: 1px solid var(--line); padding: 0.8125rem 1rem 0.8125rem 0; color: var(--text-2); font-size: 0.875rem; vertical-align: top; }
.spec .key { width: 13rem; color: var(--teal); font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.055em; text-transform: uppercase; white-space: nowrap; }
.table-note { margin-top: 1rem; }
.compact-table { margin-top: 0.25rem; }
.compact-table td { padding-block: 0.45rem; font-size: 0.78125rem; }
.compact-table th:last-child, .compact-table td:last-child { text-align: right; }
.equation { border-left: 2px solid var(--teal); padding: 0.875rem 0 0.875rem 1.125rem; font-family: var(--mono); font-size: 1.0625rem; letter-spacing: 0.02em; }
.equation sub { font-size: 0.6875rem; }
.method-note { max-width: 70rem; margin: 1.75rem 0 0; border-left: 1px solid var(--ember); padding-left: 0.75rem; color: var(--text-3); font-family: var(--mono); font-size: 0.59375rem; letter-spacing: 0.08em; text-transform: uppercase; }

.fingerprint { width: 100%; margin-top: 0.75rem; }
.fingerprint-row { display: grid; grid-template-columns: minmax(7.5rem, 1fr) minmax(9rem, 1.4fr) 3.2rem; align-items: center; gap: 0.75rem; min-height: 2rem; }
.fingerprint-row.style-start { margin-top: 0.65rem; border-top: 1px solid var(--line); padding-top: 0.65rem; }
.fingerprint-row > span, .fingerprint-row > b { font-family: var(--mono); font-size: 0.625rem; font-weight: 400; letter-spacing: 0.04em; text-transform: uppercase; }
.fingerprint-row > span { color: var(--text-2); }
.fingerprint-row > b { text-align: right; }
.diverging { position: relative; height: 0.625rem; background: linear-gradient(to right, transparent 49.7%, var(--line-2) 49.7%, var(--line-2) 50.3%, transparent 50.3%); }
.diverging i { position: absolute; top: 0; height: 100%; }
.diverging .long { left: 50%; background: var(--teal); }
.diverging .short { right: 50%; border: 1px solid var(--teal); }
.caption-note { margin-top: 0.875rem; color: var(--text-3); font-family: var(--mono); font-size: 0.59375rem; letter-spacing: 0.07em; text-transform: uppercase; }

.callout { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 3rem; }
.callout .h2 { max-width: 24ch; }
.callout .lede { max-width: 61ch; margin-top: 1rem; }
.references-section { padding-block: 4rem; }
.references td { font-size: 0.78125rem; }
.references .key { width: 2.5rem; }
.library-subhead { margin-top: 3.375rem; }
.library-table th:last-child, .library-table td:last-child { width: 8.125rem; }
.publication-link span { font-family: var(--mono); font-size: 0.625rem; }
.library-contact { margin-top: 3.375rem; }
.library-contact .button { margin-top: 1.25rem; }
.contact-options { margin-bottom: 3.5rem; }
.contact-panel { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(13rem, 0.5fr); gap: 4rem; border-top: 1px solid var(--line-2); padding-top: 2.5rem; }
.contact-panel .h2 { word-break: break-word; }
.social-links { display: flex; flex-direction: column; align-items: flex-start; }
.social-links a { margin-bottom: 0.5rem; font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; }

.site-footer { padding-block: 2.75rem 3.5rem; }
.footer-main { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; }
.footer-wordmark { font-size: 1.0625rem; }
.footer-links { display: flex; flex: 1; flex-wrap: wrap; justify-content: flex-end; gap: 1.5rem; color: var(--text-3); font-size: 0.8125rem; }
.footer-links a:hover { color: var(--text-2); }
.footer-legal { margin-top: 1.625rem; }
.footer-legal p { max-width: 70rem; margin-bottom: 0; color: var(--text-3); font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.035em; line-height: 1.7; }

@media (max-width: 900px) {
  .home-hero-grid { grid-template-columns: 1fr; }
  .hero-divider { width: 100%; height: 1px; }
  .hero-column.left, .hero-column.right { padding-inline: 0; }
  .hero-column.right { padding-top: 2.75rem; }
  .section { padding-block: 3.75rem; }
  .first-section { margin-top: 3rem; }
  .section-head, .two-column, .three-column, .workflow-grid, .contact-panel { grid-template-columns: 1fr; }
  .section-head { gap: 1.625rem; }
  .contact-panel { gap: 2.5rem; }
  .nav-links { display: none; }
  .callout { grid-template-columns: 1fr; align-items: start; gap: 2rem; }
  .callout .button { justify-self: start; }
}

@media (max-width: 580px) {
  .nav-inner { gap: 1rem; }
  .nav-cta { padding-inline: 0.6875rem; }
  .page-head { padding-top: 3.25rem; }
  .fingerprint-row { grid-template-columns: 6.5rem minmax(6rem, 1fr) 2.8rem; gap: 0.45rem; }
  .spec .key { width: auto; white-space: normal; }
  .footer-links { justify-content: flex-start; }
}

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