:root {
  color-scheme: light;
  --ink: #1b2330;
  --muted: #5f6877;
  --line: #d9dee7;
  --surface: #ffffff;
  --soft: #f3f6fa;
  --brand: #2d5f8b;
  --brand-dark: #1d4166;
  --accent: #d48920;
  --positive: #276749;
  --caution: #8a4b08;
  --max: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #f7f8fb;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.site-header,
.site-footer {
  background: var(--surface);
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  padding: 22px 0;
  text-align: center;
}

.wrap {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 85px;
  padding: 18px 0;
}

.brand-logo {
  display: block;
  color: inherit;
  text-decoration: none;
  min-width: 0;
  max-width: 430px;
  min-height: 49px;
}

.brand-logo:hover {
  text-decoration: none;
}

.brand-logo:hover .brand-title {
  color: var(--brand);
}

.brand-title {
  display: block;
  margin: 0;
  color: var(--brand-dark);
  font-size: 25px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
}

.brand-subtitle {
  display: block;
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
  min-height: 32px;
}

.nav a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--brand-dark);
  padding: 0 6px;
  font-size: 14px;
  font-weight: 700;
}

.nav a:hover,
.nav a[aria-current] {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

.breadcrumb-bar {
  background: #fbfcfe;
  border-bottom: 1px solid #e5e9f0;
}

.breadcrumbs {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.2;
}

.breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs a,
.breadcrumbs [aria-current="page"] {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 2px;
}

.breadcrumbs li + li::before {
  content: "/";
  color: #7f8996;
  margin: 0 7px;
}

.breadcrumbs [aria-current="page"] {
  color: var(--brand-dark);
  font-weight: 700;
}

.hero {
  background: linear-gradient(180deg, #ffffff 0%, #eef4fb 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  gap: 14px;
  max-width: var(--max);
  padding: 34px 0 30px;
  text-align: left;
}

.hero-inner > * {
  max-width: 860px;
}

.eyebrow,
.article-meta {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--brand-dark);
  font-size: 42px;
  letter-spacing: 0;
  line-height: 1.12;
}

.hero .dek {
  margin: 0;
  max-width: 780px;
  color: var(--muted);
  font-size: 19px;
}

main {
  padding: 34px 0 52px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 30px;
  align-items: start;
}

.article-body {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 34px 42px;
}

.article-body h2,
.article-body h3 {
  color: var(--brand-dark);
  letter-spacing: 0;
  line-height: 1.25;
}

.article-body h2 {
  margin: 38px 0 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  font-size: 25px;
}

.article-body h3 {
  margin: 28px 0 10px;
  font-size: 20px;
}

.article-body p,
.article-body ul,
.article-body ol,
.article-body table,
.article-body figure {
  margin-top: 0;
}

.article-body li + li {
  margin-top: 8px;
}

.lead {
  color: #2c3748;
  font-size: 19px;
}

.verdict {
  margin: 0 0 28px;
  border-left: 4px solid var(--accent);
  background: #fff8ed;
  padding: 16px 18px;
}

.verdict strong {
  color: var(--brand-dark);
}

.system-figure {
  margin: 26px -42px 30px;
  background: #090b0e;
}

.system-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.system-figure-scroll {
  overflow-x: auto;
}

.system-figure-scroll:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: -3px;
}

.evidence-table-scroll:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.system-figure figcaption {
  padding: 10px 42px 12px;
  background: #15191f;
  color: #d9dee7;
  font-size: 13px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 26px 0 32px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.fact {
  min-width: 0;
  padding: 14px 16px;
}

.fact + .fact {
  border-left: 1px solid var(--line);
}

.fact span,
.fact strong {
  display: block;
}

.fact span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.fact strong {
  margin-top: 3px;
  color: var(--brand-dark);
  font-size: 16px;
}

.evidence-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: 15px;
}

.evidence-table-scroll {
  margin: 22px 0 30px;
  overflow-x: auto;
}

.evidence-table th,
.evidence-table td {
  border: 1px solid var(--line);
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
}

.evidence-table th {
  background: var(--soft);
  color: var(--brand-dark);
}

.comparison-article {
  width: 100%;
}

.comparison-table {
  table-layout: fixed;
}

.comparison-table .comparison-dimension {
  width: 16%;
}

.comparison-table .comparison-meaning {
  width: 27%;
}

.comparison-table th[scope="row"] {
  background: #f8fafc;
  color: var(--brand-dark);
  font-weight: 700;
}

.comparison-unknowns th[scope="row"] {
  background: #fff8ed;
}

.status-confirmed {
  color: var(--positive);
  font-weight: 700;
}

.status-unverified {
  color: var(--caution);
  font-weight: 700;
}

.operator-checklist {
  padding-left: 22px;
}

.sources {
  font-size: 15px;
}

.sources li {
  padding-left: 4px;
}

.article-nav {
  position: sticky;
  top: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 16px;
  font-size: 14px;
}

.article-nav h2 {
  margin: 0 0 8px;
  color: var(--brand-dark);
  font-size: 16px;
}

.article-nav ol {
  margin: 0;
  padding-left: 20px;
}

.article-nav li {
  margin: 5px 0;
}

.article-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 20px;
}

.article-card h2 {
  margin: 0 0 8px;
  color: var(--brand-dark);
  font-size: 22px;
  line-height: 1.3;
}

.article-card p {
  margin: 0;
  color: var(--muted);
}

.article-card .article-meta {
  margin-top: 12px;
}

@media (max-width: 820px) {
  .masthead {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    min-height: 131px;
  }

  .brand-logo {
    max-width: 100%;
    width: 100%;
  }

  .breadcrumbs a,
  .breadcrumbs [aria-current="page"] {
    min-height: 44px;
    padding: 0 8px;
  }

  .breadcrumbs li + li::before {
    margin: 0 2px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero .dek {
    font-size: 17px;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-nav {
    position: static;
  }

  .article-body {
    padding: 24px 16px;
  }

  .system-figure {
    margin-right: -16px;
    margin-left: -16px;
  }

  .system-figure img {
    width: 100%;
    min-width: 760px;
    max-width: none;
  }

  .system-figure figcaption {
    padding-right: 16px;
    padding-left: 16px;
  }

  .facts {
    grid-template-columns: 1fr;
  }

  .fact + .fact {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .evidence-table {
    min-width: 680px;
  }

  .comparison-table {
    min-width: 920px;
  }
}

@media (max-width: 340px) {
  .nav { flex-wrap: wrap; gap: 6px; }
  .nav a { padding-inline: 5px; }
}