@font-face {
  font-family: 'Space Grotesk';
  src: url('/assets/fonts/space-grotesk-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: 'Source Serif 4';
  src: url('/assets/fonts/source-serif-4-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/assets/fonts/ibm-plex-mono-400-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/assets/fonts/ibm-plex-mono-500-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/assets/fonts/ibm-plex-mono-600-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

:root {
  --ink: #17171a;
  --body: #2b2b27;
  --muted: #55554e;
  --quiet: #6b6b64;
  --paper: #fbfbfa;
  --surface: #ffffff;
  --soft: #f7f8fa;
  --blue: #4d6bfe;
  --blue-dark: #2f4bd8;
  --blue-light: #a8b8ff;
  --mist: #eef2ff;
  --hero: #f4f7ff;
  --shadow: #dce3f8;
  --line: #e8e8e2;
  --line-blue: #cbd5f1;
  --max: 1240px;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif: 'Source Serif 4', Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--body);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a {
  color: var(--blue-dark);
  text-decoration-color: var(--blue-light);
  text-decoration-thickness: .07em;
  text-underline-offset: .18em;
}
a:hover { color: #1d38c2; text-decoration-color: currentColor; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--blue-light); outline-offset: 3px; }
code { font-family: var(--mono); }
::selection { background: var(--shadow); }
.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: .7rem 1rem;
  color: #fff;
  background: var(--blue);
}
.skip-link:focus { top: 1rem; }

.signal-bar {
  min-height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(1.4rem, 5vw, 4.5rem);
  padding: .56rem 1.2rem;
  color: var(--muted);
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  font: 500 .67rem/1.4 var(--mono);
  letter-spacing: .025em;
}
.signal-bar code { color: var(--blue-dark); font-weight: 600; }
.signal-dot {
  display: inline-block;
  width: .48rem;
  height: .48rem;
  margin-right: .45rem;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 .2rem var(--mist);
}

.site-header {
  max-width: var(--max);
  min-height: 94px;
  margin: 0 auto;
  padding: 1.2rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-inline: 1px solid var(--line);
  background: var(--surface);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  color: var(--ink);
  text-decoration: none;
  font: 500 .76rem/.95 var(--mono);
  letter-spacing: .08em;
}
.wordmark b { font-weight: 600; letter-spacing: .14em; }
.wordmark-mark { width: 2.3rem; height: 2.3rem; flex: none; display: block; }
#site-nav { display: flex; align-items: center; gap: 1.9rem; }
#site-nav a {
  position: relative;
  color: var(--ink);
  font: 600 .7rem/1 var(--mono);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .065em;
}
#site-nav a::after {
  content: '';
  position: absolute;
  inset: auto 50% -.62rem;
  height: 2px;
  background: var(--blue);
  transition: inset .16s ease;
}
#site-nav a:hover::after, #site-nav a[aria-current='page']::after { inset-inline: 0; }
.nav-toggle {
  display: none;
  border: 1px solid var(--blue);
  color: var(--blue-dark);
  background: var(--surface);
  padding: .55rem .75rem;
  font: 600 .7rem var(--mono);
  text-transform: uppercase;
}

.page-shell {
  max-width: var(--max);
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--line);
}
.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(260px, .65fr);
  gap: clamp(2rem, 6vw, 6rem);
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.4rem, 6vw, 5.5rem) clamp(3rem, 6vw, 4.8rem);
  color: var(--ink);
  background: var(--hero);
  border-bottom: 4px solid var(--blue);
}
.eyebrow {
  margin: 0 0 1.2rem;
  color: var(--quiet);
  font: 500 .7rem/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
}
.eyebrow span {
  display: inline-block;
  margin-right: .35rem;
  padding: .32rem .65rem;
  color: #fff;
  background: var(--blue-dark);
  font-weight: 600;
}
.page-hero h1 {
  max-width: 880px;
  margin: 0;
  color: var(--ink);
  font: 900 clamp(2.8rem, 5.2vw, 4.8rem)/1.02 var(--serif);
  letter-spacing: -.036em;
  text-wrap: balance;
}
.dek {
  max-width: 720px;
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.55vw, 1.16rem);
  line-height: 1.62;
}
.verification-card {
  position: relative;
  align-self: end;
  padding: 1.2rem 1.35rem;
  border: 1.5px solid var(--blue);
  background: var(--surface);
  box-shadow: 8px 8px 0 var(--shadow);
}
.verification-label {
  margin: 0 0 .75rem;
  color: var(--blue-dark);
  font: 600 .66rem var(--mono);
  text-transform: uppercase;
  letter-spacing: .11em;
}
.verification-card dl { margin: 0; }
.verification-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .68rem 0;
  border-top: 1px solid var(--mist);
}
.verification-card dt { color: var(--quiet); font: .66rem var(--mono); }
.verification-card dd { margin: 0; color: var(--ink); text-align: right; font: 500 .7rem var(--mono); }
.state-pill { padding: .22rem .48rem; color: var(--blue-dark); background: var(--mist); font-weight: 600; }

.article-layout {
  display: grid;
  grid-template-columns: 245px minmax(0, 760px);
  gap: clamp(2rem, 5vw, 5rem);
  justify-content: center;
  padding: clamp(2.5rem, 6vw, 5.5rem);
}
.article-rail { min-width: 0; }
.rail-card {
  position: sticky;
  top: 1.5rem;
  padding: 1.1rem;
  border: 1px solid var(--line-blue);
  background: var(--surface);
}
.rail-card + .rail-card { position: static; margin-top: 1rem; }
.rail-label {
  margin: 0 0 .85rem;
  color: var(--quiet);
  font: 600 .63rem var(--mono);
  text-transform: uppercase;
  letter-spacing: .12em;
}
.rail-toc ul { margin: 0; padding: 0; list-style: none; }
.rail-toc li { margin: .65rem 0; font-size: .76rem; line-height: 1.35; }
.rail-toc li li { margin-left: .75rem; }
.rail-toc a { color: var(--body); text-decoration: none; }
.rail-toc a:hover { color: var(--blue-dark); }
.evidence-key p:not(.rail-label) {
  display: flex;
  gap: .55rem;
  align-items: center;
  margin: .55rem 0;
  color: var(--muted);
  font-size: .7rem;
}
.grade {
  display: inline-grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  flex: none;
  border: 1px solid var(--blue);
  color: var(--blue-dark);
  font: 600 .63rem var(--mono);
}
.grade--a { background: #dfe6ff; }
.grade--b { background: var(--mist); }
.grade--c { background: #f4f5fb; }
.grade--d { background: var(--surface); }

.prose { min-width: 0; color: var(--body); font-size: 1.03rem; line-height: 1.74; }
.prose > :first-child { margin-top: 0; }
.prose p { margin: 0 0 1.4rem; }
.prose strong { color: var(--ink); }
.prose h2, .prose h3 { scroll-margin-top: 1rem; color: var(--ink); text-wrap: balance; }
.prose h2 {
  margin: 3.25rem 0 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font: 900 clamp(1.85rem, 3.3vw, 2.55rem)/1.08 var(--serif);
  letter-spacing: -.02em;
}
.prose h2::before { content: '// '; color: var(--blue); font: 600 .62em var(--mono); }
.prose h3 { margin: 2.25rem 0 .8rem; font-size: 1.15rem; line-height: 1.35; }
.prose h3::before { content: '↳ '; color: var(--blue); font-family: var(--mono); }
.prose ul, .prose ol { padding-left: 1.35rem; }
.prose li { margin: .55rem 0; padding-left: .25rem; }
.prose blockquote {
  margin: 2rem 0;
  padding: 1.4rem 1.55rem;
  border: 1px solid var(--line-blue);
  border-left: 6px solid var(--blue);
  background: var(--mist);
  box-shadow: 7px 7px 0 var(--shadow);
}
.prose blockquote p { margin: 0 0 .8rem; }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose code { padding: .14em .34em; color: var(--blue-dark); background: var(--mist); border: 1px solid var(--shadow); font-size: .84em; overflow-wrap: anywhere; word-break: break-word; }
.prose pre { overflow-x: auto; padding: 1.25rem; color: #eef2ff; background: #171e3b; border-left: 5px solid var(--blue-light); }
.prose pre code { padding: 0; color: inherit; background: transparent; border: 0; overflow-wrap: normal; word-break: normal; }
.table-scroll { overflow-x: auto; margin: 1.5rem 0 2rem; border: 1px solid var(--line-blue); }
.prose table { width: 100%; min-width: 580px; border-collapse: collapse; font-size: .82rem; line-height: 1.5; }
.prose th { color: #fff; background: var(--blue-dark); font: 600 .69rem var(--mono); text-align: left; }
.prose th, .prose td { padding: .82rem .95rem; border: 1px solid var(--line-blue); vertical-align: top; }
.prose tr:nth-child(even) td { background: var(--soft); }
.prose hr { margin: 3.5rem 0; border: 0; border-top: 1px solid var(--line); }

.ad-break {
  width: calc(100% + 2rem);
  margin: 2.35rem -1rem;
  padding: .65rem 1rem .85rem;
  border-block: 1px solid var(--line);
  background: var(--soft);
  text-align: center;
}
.ad-kicker {
  display: block;
  margin-bottom: .45rem;
  color: var(--quiet);
  font: 500 .56rem var(--mono);
  text-transform: uppercase;
  letter-spacing: .12em;
}
.ad-unit {
  margin: 0 auto;
  display: grid;
  place-items: center;
  color: var(--quiet);
  background: var(--surface);
  border: 1px solid var(--line-blue);
  font: .64rem var(--mono);
}
.ad-unit--desktop { width: min(728px, 100%); height: 90px; }
.ad-unit--mobile { display: none; width: 320px; max-width: 100%; height: 50px; }
.ad-unit--responsive { width: min(728px, 100%); min-height: 90px; border: 0; background: transparent; }
.ad-unit--rectangle { width: 300px; max-width: 100%; height: 250px; }

.page--utility .page-hero { grid-template-columns: 1fr; }
.page--utility .verification-card { display: none; }
.page--utility .article-layout { grid-template-columns: minmax(0, 760px); }

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 2rem;
  padding: 3rem clamp(1.4rem, 6vw, 5.5rem);
  color: var(--body);
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 0;
}
.site-footer p { max-width: 550px; color: var(--quiet); font-size: .8rem; line-height: 1.65; }
.wordmark--footer { color: var(--ink); }
.wordmark--footer .wordmark-mark { width: 1.75rem; height: 1.75rem; }
.site-footer nav { display: grid; grid-template-columns: repeat(2, 1fr); align-content: start; gap: 1rem; }
.site-footer nav a { color: var(--muted); font: 500 .68rem var(--mono); text-transform: uppercase; }
.site-footer .legal { grid-column: 1 / -1; margin: 1rem 0 0; padding-top: 1.5rem; border-top: 1px solid var(--line); }

@media (max-width: 860px) {
  .signal-bar { justify-content: space-between; }
  .signal-bar > div:nth-child(2) { display: none; }
  .site-header { min-height: 76px; padding: 1rem 1.2rem; }
  .nav-toggle { display: block; }
  #site-nav {
    position: absolute;
    z-index: 20;
    inset: 112px 1rem auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .55rem;
    background: var(--surface);
    border: 1px solid var(--blue);
    box-shadow: 7px 7px 0 var(--shadow);
  }
  #site-nav.is-open { display: flex; }
  #site-nav a { padding: .85rem; }
  #site-nav a::after { display: none; }
  .page-hero { grid-template-columns: 1fr; gap: 2.3rem; }
  .verification-card { max-width: 520px; width: 100%; }
  .article-layout { grid-template-columns: 1fr; }
  .article-rail { display: none; }
}

@media (max-width: 560px) {
  .signal-bar { min-height: 32px; justify-content: center; font-size: .58rem; }
  .signal-bar > div:nth-child(3) { display: none; }
  .wordmark-mark { width: 2rem; height: 2rem; }
  #site-nav { top: 101px; }
  .page-hero { padding: 2.8rem 1.2rem 2.5rem; border-bottom-width: 4px; }
  .eyebrow { margin-bottom: 1rem; font-size: .62rem; }
  .page-hero h1 { font-size: clamp(2.45rem, 12vw, 3.35rem); line-height: 1.01; }
  .dek { font-size: .97rem; line-height: 1.58; }
  .verification-card { padding: 1rem; box-shadow: 6px 6px 0 var(--shadow); }
  .verification-card dl div { align-items: baseline; }
  .article-layout { padding: 2.2rem 1.2rem 3.5rem; }
  .prose { font-size: .97rem; line-height: 1.72; }
  .prose h2 { margin-top: 2.7rem; }
  .prose blockquote { padding: 1.15rem; margin-right: .35rem; box-shadow: 5px 5px 0 var(--shadow); }
  .ad-break { width: calc(100% + 1rem); margin-inline: -.5rem; padding-inline: .5rem; }
  .ad-unit--desktop { display: none; }
  .ad-unit--mobile { display: grid; }
  .ad-unit--responsive { width: 320px; min-height: 50px; }
  .site-footer { grid-template-columns: 1fr; padding: 2.5rem 1.2rem; }
  .site-footer .legal { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  #site-nav a::after { transition: none; }
}