:root {
  color-scheme: dark;
  --page: #050505;
  --panel: #0b0b0b;
  --panel-raised: #111;
  --line: #2c2c2c;
  --line-strong: #444;
  --text: #f5f5f1;
  --muted: #a4a49e;
  --quiet: #7c7c77;
  --silver: #d6d6d0;
  --max: 1240px;
  --reading: 860px;
  font-family: "Segoe UI", Arial, sans-serif;
  font-synthesis: none;
  background: var(--page);
  color: var(--text);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 112px; }
body { margin: 0; min-width: 320px; background: var(--page); color: var(--text); }
body, button, input, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
::selection { background: #efefeb; color: #050505; }

.nav {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  width: 100%;
  height: 78px;
  padding: 0 max(32px, calc((100vw - 1320px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #323232;
  background: rgba(5,5,5,.94);
  box-shadow: 0 18px 45px rgba(0,0,0,.32);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
body > .nav + main { padding-top: 78px; }
.brand { display: inline-flex; align-items: center; gap: 15px; color: var(--text); }
.brand__mark { display: block; width: 42px; height: 38px; object-fit: contain; }
.brand__name { font-family: "Times New Roman", Times, serif; font-size: 20px; font-weight: 400; letter-spacing: .01em; }
.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links > a { color: #bababa; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; transition: color .2s; }
.nav__links > a:hover { color: white; }
.nav__links .nav__cta { min-height: 50px; padding: 0 27px; display: flex; align-items: center; gap: 10px; border: 1px solid #696965; color: white; background: linear-gradient(145deg, #292929, #141414 68%); box-shadow: inset 0 1px rgba(255,255,255,.11), 0 10px 28px rgba(0,0,0,.28); }
.nav__links .nav__cta:hover { border-color: #969690; background: linear-gradient(145deg, #333, #191919 68%); }
.nav__check { position: absolute; opacity: 0; pointer-events: none; }
.nav__toggle { width: 44px; height: 44px; padding: 10px; display: none; border: 0; background: transparent; cursor: pointer; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: #f4f4f1; transition: transform .2s ease, opacity .2s ease; }
.nav__toggle span + span { margin-top: 5px; }
.nav__check:checked ~ .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__check:checked ~ .nav__toggle span:nth-child(2) { opacity: 0; }
.nav__check:checked ~ .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid #fff; outline-offset: 4px; }

.article-wrap { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.article-shell { width: min(100%, var(--reading)); }
.breadcrumbs { padding: 34px 0 0; color: #85857f; font-size: 12px; }
.breadcrumbs ol { margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 9px; list-style: none; }
.breadcrumbs li + li::before { content: "/"; margin-right: 9px; color: #4c4c48; }
.breadcrumbs a:hover { color: white; }

.article-header { padding: 86px 0 58px; border-bottom: 1px solid var(--line); }
.article-header--wide { max-width: 1050px; }
.article-eyebrow, .section-label { margin: 0 0 22px; color: #aaa; font-size: 12px; letter-spacing: .18em; text-transform: uppercase; }
.article-header h1 { max-width: 920px; margin: 0; font-family: "Segoe UI Variable Display", "Segoe UI", Arial, sans-serif; font-size: clamp(3.3rem, 7vw, 7rem); font-weight: 300; letter-spacing: -.045em; line-height: .94; }
.article-deck { max-width: 800px; margin: 32px 0 0; color: #b9b9b4; font-size: clamp(1.15rem, 2vw, 1.45rem); line-height: 1.65; }
.article-meta { margin: 34px 0 0; color: #81817c; font-size: 13px; }
.article-meta span { margin: 0 7px; color: #444; }

.answer-block { margin: 56px 0 64px; padding: 36px 40px; border: 1px solid #444; background: linear-gradient(145deg, #151515, #0b0b0b 70%); }
.answer-block h2 { margin: 0 0 18px; color: #aaa; font-size: 12px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; }
.answer-block p { margin: 0; color: #ededE8; font-family: "Segoe UI Variable Display", "Segoe UI", Arial, sans-serif; font-size: clamp(1.35rem, 2.4vw, 2.05rem); font-weight: 300; line-height: 1.5; letter-spacing: -.018em; }

.takeaways { margin: 0 0 72px; }
.takeaways h2, .article-section h2, .example-block h2, .limitations h2, .evaluation-cta h2, .hub-group h2, .faq-group h2, .glossary-group > h2 {
  margin: 0 0 24px;
  font-family: "Segoe UI Variable Display", "Segoe UI", Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 350;
  letter-spacing: -.035em;
  line-height: 1.05;
}
.takeaways ul, .measure-list { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.takeaways li, .measure-list li { min-height: 62px; padding: 18px 4px 18px 34px; position: relative; border-bottom: 1px solid var(--line); color: #c8c8c3; line-height: 1.55; }
.takeaways li::before, .measure-list li::before { content: ""; position: absolute; left: 3px; top: 28px; width: 9px; height: 1px; background: #aaa; }

.article-section { margin: 0 0 72px; }
.article-section > p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.8; }
.article-section > p + p { margin-top: 22px; }
.text-link { min-height: 44px; margin-top: 24px; display: inline-flex; align-items: center; color: #e4e4df; border-bottom: 1px solid #555; font-size: 14px; }
.text-link:hover { border-color: white; }

.example-block, .limitations { margin: 0 0 72px; padding: 40px; border: 1px solid var(--line-strong); background: #0d0d0d; }
.example-block { border-left: 3px solid #bdbdb7; }
.example-block p:last-child, .limitations p { margin: 0; color: #b0b0aa; font-size: 16px; line-height: 1.75; }
.limitations { border-color: #383838; background: #090909; }
.limitations h2 { font-size: clamp(1.8rem, 3vw, 2.7rem); }

.metric-section > p { margin-bottom: 28px; }
.definition-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.definition-card { min-width: 0; padding: 26px; border-right: 1px solid var(--line); background: #0a0a0a; }
.definition-card:last-child { border-right: 0; }
.definition-card h3 { margin: 0 0 18px; font-size: 18px; font-weight: 500; line-height: 1.25; }
.definition-card p { margin: 0; color: #969691; font-size: 14px; line-height: 1.65; }
.definition-card a { min-height: 44px; margin-top: 18px; display: inline-flex; align-items: center; color: #d2d2cc; font-size: 12px; border-bottom: 1px solid #444; }

.product-relevance { padding: 42px; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); background: radial-gradient(circle at 0 0, #171717, #0a0a0a 62%); }
.article-faq-list { border-top: 1px solid var(--line); }
.article-faq { padding: 25px 0; border-bottom: 1px solid var(--line); }
.article-faq h3 { margin: 0 0 12px; font-size: 18px; font-weight: 500; }
.article-faq p { margin: 0; color: #999994; line-height: 1.7; }

.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.related-card { min-height: 210px; padding: 28px; display: flex; flex-direction: column; border-right: 1px solid var(--line); background: #090909; transition: background .2s ease, border-color .2s ease; }
.related-card:last-child { border-right: 0; }
.related-card:hover { background: #111; }
.related-card span, .hub-card > span { color: #858580; font-size: 11px; letter-spacing: .13em; text-transform: uppercase; }
.related-card strong { margin: auto 0 20px; font-size: 20px; font-weight: 450; line-height: 1.25; }
.related-card em, .hub-card em { color: #9b9b96; font-size: 12px; font-style: normal; }

.evaluation-cta { margin: 96px 0 120px; padding: 56px; border: 1px solid #4a4a4a; background: radial-gradient(circle at 20% 10%, #1a1a1a, #090909 62%); }
.evaluation-cta h2 { max-width: 720px; }
.evaluation-cta > p:not(.section-label) { max-width: 720px; color: #aaa; font-size: 16px; line-height: 1.7; }
.evaluation-cta > div { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.button-primary, .button-secondary { min-height: 52px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #61615d; font-size: 12px; font-weight: 600; letter-spacing: .11em; text-transform: uppercase; }
.button-primary { background: linear-gradient(145deg, #303030, #171717); }
.button-secondary { color: #b4b4af; border-color: #3f3f3f; }
.button-primary:hover, .button-secondary:hover { border-color: white; color: white; }

.jump-nav, .alphabet-nav { margin: 0 0 72px; padding: 22px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; border: 1px solid var(--line); background: #090909; }
.jump-nav span, .alphabet-nav span { margin-right: 10px; color: #777; font-size: 11px; letter-spacing: .13em; text-transform: uppercase; }
.jump-nav a, .alphabet-nav a { min-height: 44px; padding: 0 13px; display: inline-flex; align-items: center; border: 1px solid #333; color: #c3c3be; font-size: 13px; }
.jump-nav a:hover, .alphabet-nav a:hover { border-color: #aaa; color: white; }
.faq-group { margin: 0 0 96px; scroll-margin-top: 112px; }
.faq-group__heading { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 20px; margin-bottom: 28px; }
.faq-group__heading .section-label { grid-column: 1 / -1; margin-bottom: 0; }
.faq-group__heading h2 { margin: 0; }
.faq-group__heading > a { min-height: 44px; display: inline-flex; align-items: center; color: #aaa; font-size: 13px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { display: grid; grid-template-columns: .78fr 1.22fr; gap: 50px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.faq-item h3 { margin: 0; font-size: 18px; font-weight: 500; line-height: 1.45; }
.faq-item p { margin: 0; color: #9f9f99; line-height: 1.72; }

.glossary-group { margin: 0 0 82px; scroll-margin-top: 112px; }
.glossary-group > h2 { padding-bottom: 18px; border-bottom: 1px solid var(--line-strong); }
.glossary-group > div { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 40px; }
.glossary-term { padding: 27px 0; scroll-margin-top: 112px; border-bottom: 1px solid var(--line); }
.glossary-term h3 { margin: 0 0 13px; font-size: 20px; font-weight: 500; }
.glossary-term p { margin: 0; color: #9e9e98; line-height: 1.68; }
.glossary-term a { min-height: 44px; margin-top: 14px; display: inline-flex; align-items: center; color: #c5c5bf; font-size: 12px; }

.hub-wrap { width: min(calc(100% - 48px), var(--max)); }
.hub-intro { width: min(100%, var(--reading)); }
.hub-group { margin: 0 0 104px; }
.hub-group__heading { max-width: 820px; margin-bottom: 32px; }
.hub-group__heading > p:last-child { color: #999994; line-height: 1.7; }
.hub-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.hub-card { min-height: 300px; padding: 30px; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #090909; transition: background .2s ease; }
.hub-card:hover { background: #111; }
.hub-card h3 { margin: 46px 0 16px; font-size: 23px; font-weight: 450; line-height: 1.2; }
.hub-card p { margin: 0 0 28px; display: -webkit-box; overflow: hidden; color: #90908b; font-size: 14px; line-height: 1.65; -webkit-line-clamp: 5; -webkit-box-orient: vertical; }
.hub-card em { margin-top: auto; }

.resource-brand { min-height: 48px; display: inline-flex; align-items: center; gap: 13px; }
.resource-brand img { width: 38px; height: 34px; object-fit: contain; }
.resource-brand span { font-family: "Times New Roman", Times, serif; font-size: 19px; }
.resource-footer { padding: 54px max(24px, calc((100vw - var(--max)) / 2)); border-top: 1px solid var(--line); background: #030303; }
.resource-footer > div:first-child { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.resource-brand--footer img { width: 34px; height: 30px; }
.resource-footer > div:first-child p { margin: 0; color: #858580; }
.resource-footer nav { margin: 35px 0; padding: 25px 0; display: flex; flex-wrap: wrap; gap: 10px 26px; border-top: 1px solid #202020; border-bottom: 1px solid #202020; }
.resource-footer nav a, .resource-footer__legal { color: #8f8f8a; font-size: 12px; }
.resource-footer nav a { min-height: 44px; display: inline-flex; align-items: center; text-transform: uppercase; letter-spacing: .08em; }
.resource-footer nav a:hover, .resource-footer__legal a:hover { color: white; }
.resource-footer__legal { display: flex; flex-wrap: wrap; gap: 10px 28px; }

@media (max-width: 900px) {
  .nav { padding: 0 28px; }
  .nav__links { gap: 18px; }
  .nav__links > a:not(.nav__cta) { display: none; }
  .definition-grid, .related-grid, .hub-grid { grid-template-columns: 1fr 1fr; }
  .definition-card:nth-child(2) { border-right: 0; }
  .definition-card:last-child { grid-column: 1 / -1; border-top: 1px solid var(--line); }
  .related-card:nth-child(2) { border-right: 0; }
  .related-card:last-child { grid-column: 1 / -1; border-top: 1px solid var(--line); }
  .faq-item { grid-template-columns: 1fr; gap: 14px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 92px; }
  body { overflow-x: hidden; }
  .nav { height: 72px; padding: 0 20px; }
  body > .nav + main { padding-top: 72px; }
  .brand__name { font-size: 19px; }
  .nav__links { position: absolute; top: 100%; left: 0; right: 0; padding: 25px 20px; display: none; flex-direction: column; align-items: stretch; background: #080808; border-bottom: 1px solid #333; }
  .nav__links > a:not(.nav__cta) { display: block; padding: 10px 4px; }
  .nav__links .nav__cta { justify-content: space-between; }
  .nav__toggle { display: flex; flex-direction: column; align-items: center; justify-content: center; }
  .nav__check:checked ~ .nav__links { display: flex; }
  .article-wrap, .hub-wrap { width: min(calc(100% - 36px), var(--max)); min-width: 0; }
  .breadcrumbs { padding-top: 22px; font-size: 11px; line-height: 1.5; }
  .breadcrumbs ol, .breadcrumbs li { min-width: 0; max-width: 100%; }
  .breadcrumbs li { overflow-wrap: anywhere; }
  .article-header { padding: 54px 0 42px; }
  .article-header > * { max-width: 100%; }
  .article-header h1 { font-size: clamp(2.25rem, 10.5vw, 3.65rem); line-height: 1; letter-spacing: -.035em; overflow-wrap: anywhere; hyphens: auto; }
  .article-meta, .article-deck { overflow-wrap: anywhere; }
  .answer-block { margin: 40px 0 54px; padding: 27px 24px; }
  .answer-block p { font-size: 1.28rem; }
  .takeaways, .article-section, .example-block, .limitations { margin-bottom: 58px; }
  .example-block, .limitations, .product-relevance { padding: 28px 24px; }
  .definition-grid, .related-grid, .hub-grid, .glossary-group > div { grid-template-columns: 1fr; }
  .definition-card, .definition-card:nth-child(2), .related-card, .related-card:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .definition-card:last-child, .related-card:last-child { grid-column: auto; border-top: 0; border-bottom: 0; }
  .evaluation-cta { margin: 70px 0 90px; padding: 34px 25px; }
  .evaluation-cta > div { flex-direction: column; align-items: stretch; }
  .jump-nav, .alphabet-nav { padding: 16px; }
  .jump-nav span, .alphabet-nav span { width: 100%; }
  .faq-group { margin-bottom: 72px; }
  .faq-group__heading { grid-template-columns: 1fr; }
  .faq-group__heading .section-label { grid-column: auto; }
  .hub-group { margin-bottom: 78px; }
  .hub-card { min-height: 255px; }
  .resource-footer > div:first-child { align-items: flex-start; flex-direction: column; }
  .resource-footer__legal { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}