:root {
  --ink: #14191e;
  --paper: #f7f3ea;
  --apron: #e7e2d6;
  --yellow: #f2c200;
  --harbor: #1b4b6a;
  --muted: #52606b;
  --rule: rgba(20, 25, 30, 0.16);
  --rule-strong: rgba(20, 25, 30, 0.38);
  --measure: 74ch;
  --container: 78rem;
  --gutter: clamp(1rem, 4vw, 2.75rem);
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0;
  min-width: 320px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1.06rem;
  line-height: 1.68;
  overflow-x: clip;
}
main { display: block; }
a { color: var(--harbor); text-decoration-thickness: 1px; text-underline-offset: .16em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--harbor); outline-offset: 3px; }
h1, h2, h3, h4 { color: var(--ink); font-family: Arial, Helvetica, sans-serif; line-height: 1.13; text-wrap: balance; }
h1 { font-size: clamp(2.15rem, 4.8vw, 4.65rem); letter-spacing: -.045em; margin: 0; max-width: 13ch; }
h2 { font-size: clamp(1.65rem, 2.8vw, 2.65rem); letter-spacing: -.025em; margin: 0; }
h3 { font-size: 1.25rem; margin: 0; }
p, ul, ol, blockquote, pre { margin: 0; }
strong { font-weight: 700; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
img { display: block; max-width: 100%; height: auto; }

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  padding: .7rem 1rem; background: var(--ink); color: var(--paper); text-decoration: none;
}
.skip-link:focus { top: 1rem; }
.research-header { border-bottom: 1px solid var(--rule); background: var(--paper); }
.research-header__inner, .breadcrumbs, .research-article, .research-footer__inner {
  width: min(100%, var(--container)); margin: 0 auto; padding-inline: var(--gutter);
}
.research-header__inner {
  min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.research-brand { color: var(--ink); font-weight: 800; letter-spacing: .02em; text-decoration: none; }
.research-header__label { color: var(--muted); font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; }
.breadcrumbs {
  display: flex; flex-wrap: wrap; gap: .55rem; padding-top: 1.25rem; color: var(--muted);
  font-size: .82rem;
}
.breadcrumbs a { color: var(--ink); }
.research-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(18rem, .78fr); align-items: center; gap: clamp(2rem, 7vw, 6rem);
  padding-block: clamp(2.75rem, 7vw, 6.5rem) clamp(2rem, 5vw, 4.5rem);
}
.eyebrow {
  color: var(--harbor); font-size: .76rem; font-weight: 700; letter-spacing: .14em;
  line-height: 1.45; text-transform: uppercase; margin-bottom: 1rem;
}
.dek { font-size: clamp(1.1rem, 1rem + .45vw, 1.35rem); max-width: 55ch; margin-top: 1.4rem; }
.byline { color: var(--muted); font-size: .92rem; margin-top: 1.4rem; }
.research-hero figure { margin: 0; }
.research-hero img { border: 1px solid var(--rule-strong); background: var(--apron); }
figcaption { color: var(--muted); font-size: .82rem; line-height: 1.45; margin-top: .75rem; }
.toc {
  border-block: 1px solid var(--rule-strong); padding-block: 1.7rem; margin-bottom: clamp(3rem, 7vw, 6rem);
}
.toc h2 { font-size: 1.35rem; margin-bottom: 1rem; }
.toc-columns { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2rem; }
.toc h3 { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: .6rem; }
.toc ol { padding-left: 1.5rem; }
.toc li { padding-block: .18rem; }
.toc a { font-size: .95rem; }
.research-content { max-width: var(--measure); margin-inline: auto; overflow-x: clip; }
.research-content > h1 { margin-bottom: 1.5rem; }
.research-content > h2, .research-content > h3 { scroll-margin-top: 5rem; }
.research-content > h2 {
  border-top: 1px solid var(--rule-strong); margin-top: clamp(4rem, 9vw, 7rem); padding-top: 1.25rem;
}
.research-content > h3 { margin-top: 2.25rem; }
.research-content > p, .research-content > ul, .research-content > ol, .research-content > blockquote, .research-content > pre {
  margin-top: 1.15rem;
}
.research-content ul, .research-content ol { padding-left: 1.5rem; }
.research-content li + li { margin-top: .7rem; }
.research-content blockquote {
  border-left: 3px solid var(--yellow); padding: .6rem 0 .6rem 1.2rem; color: var(--muted);
}
.research-content code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9em; }
.research-content pre { background: var(--ink); color: var(--paper); overflow-x: auto; padding: 1rem; }
.research-anchor { display: block; height: 0; scroll-margin-top: 5rem; }
.table-wrap {
  overflow-x: auto; margin-top: 1.35rem; border: 1px solid var(--rule-strong);
  background: rgba(255, 255, 255, .22); -webkit-overflow-scrolling: touch;
}
.table-wrap table { border-collapse: collapse; width: 100%; min-width: 44rem; font-size: .92rem; }
.table-wrap caption {
  caption-side: top; padding: 1rem 1.1rem; background: var(--apron); font-size: 1rem;
  font-weight: 700; text-align: left; line-height: 1.35;
}
.table-wrap th, .table-wrap td { border-bottom: 1px solid var(--rule); padding: .8rem 1rem; text-align: left; vertical-align: top; }
.table-wrap thead th {
  background: rgba(231, 226, 214, .62); font-size: .74rem; letter-spacing: .08em;
  text-transform: uppercase; white-space: normal;
}
.table-wrap tbody th { font-weight: 700; }
.table-wrap tr:last-child th, .table-wrap tr:last-child td { border-bottom: 0; }
.source-line {
  border-left: 3px solid var(--rule-strong); color: var(--muted); font-size: .88rem;
  line-height: 1.55; padding-left: 1rem; margin-top: .85rem !important;
}
.research-footer { background: var(--ink); color: var(--paper); margin-top: clamp(4rem, 9vw, 8rem); }
.research-footer__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 3rem; padding-block: 2.5rem;
}
.research-footer p { max-width: 58ch; font-size: .92rem; }
.research-footer a { color: var(--paper); }
.research-footer nav { display: flex; flex-wrap: wrap; gap: .8rem 1.25rem; font-size: .9rem; }

@media (max-width: 48rem) {
  .research-header__inner { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 1rem; }
  .research-header__label { font-size: .7rem; }
  .research-hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 2.5rem; }
  h1 { max-width: 15ch; }
  .toc-columns { grid-template-columns: 1fr; gap: 1.5rem; }
  .table-wrap table { min-width: 39rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}