:root {
  --bg: #f4f6f8;
  --paper: #ffffff;
  --soft: #eef1f4;
  --line: #d8dde3;
  --text: #18202a;
  --muted: #627080;
  --accent: #b7262f;
  --accent-dark: #861d26;
  --blue: #1c4e80;
  --graphite: #28313d;
  --shadow: 0 14px 32px rgba(24, 32, 42, .08);
  --radius: 8px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--paper);
  color: var(--text);
  box-shadow: var(--shadow);
}

.skip-link:focus { transform: translateY(0); }

img {
  display: block;
  width: 100%;
  height: auto;
}

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid #e2a900;
  outline-offset: 3px;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  background: var(--graphite);
  color: #fff;
  font-size: 14px;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.header-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  min-height: 72px;
}

.brand {
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0;
  font-size: 22px;
}

.brand span {
  color: var(--accent);
}

.nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
}

.nav a {
  color: var(--text);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 15px;
}

.nav a[aria-current="page"],
.nav a:hover {
  background: var(--soft);
  color: var(--accent-dark);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 6px;
  width: 42px;
  height: 42px;
  font-size: 24px;
  color: var(--text);
}

.crumbs {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.crumbs a { color: var(--muted); }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  margin: -8px 0 24px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--muted);
  font-size: 14px;
}

.article-meta strong { color: var(--text); }

.hero-portal {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, .8fr);
  gap: 22px;
  margin: 22px 0 28px;
}

.hero-digest {
  display: flex;
  flex-direction: column;
  gap: 18px;
  height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.digest-head h2 {
  margin-top: 5px;
  font-size: clamp(26px, 2.4vw, 34px);
}

.digest-head p {
  color: var(--muted);
  line-height: 1.5;
}

.eyebrow,
.digest-kicker {
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.digest-list {
  display: grid;
  gap: 10px;
}

.digest-card {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fbfcfe;
  color: var(--text);
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.digest-card strong {
  font-size: 17px;
  line-height: 1.3;
}

.digest-card > span:last-child {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.digest-card:hover {
  transform: translateY(-2px);
  border-color: #c5a2a5;
  color: var(--text);
  box-shadow: 0 8px 20px rgba(24, 32, 42, .08);
}

.digest-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.digest-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 10px;
}

.digest-tags a {
  padding: 6px 9px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--text);
  font-size: 13px;
}

.digest-tags a:hover { color: var(--accent-dark); }

.lead-photo,
.page-hero {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.lead-photo img,
.page-hero img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.lead-copy,
.page-intro {
  padding: 22px;
}

.lead-copy h1 {
  max-width: 24ch;
  font-size: clamp(34px, 3.2vw, 42px);
  letter-spacing: -.025em;
}

.lead-copy p {
  max-width: 64ch;
  color: #394553;
  line-height: 1.55;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 12px;
}

h1 { font-size: clamp(30px, 4vw, 48px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }

p { margin: 0 0 14px; }

.muted { color: var(--muted); }
.small { font-size: 14px; }

.quick-links,
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.quick-links a,
.tag-cloud a,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--text);
  font-size: 14px;
}

.lead-copy .quick-links a:first-child {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.tag { background: var(--soft); }

.portal-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 24px;
  align-items: start;
}

.home-flow {
  display: grid;
  gap: 24px;
}

.home-flow > .section {
  margin-bottom: 0;
}

.home-section-head {
  max-width: 780px;
  margin-bottom: 20px;
}

.home-section-head h2 {
  margin-top: 5px;
  margin-bottom: 8px;
}

.home-section-head p {
  margin-bottom: 0;
}

.home-support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.home-support-panel {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.home-support-panel h2 {
  margin-top: 5px;
  font-size: clamp(26px, 2.6vw, 32px);
}

.source-points {
  display: grid;
  gap: 0;
  margin: 18px 0 14px !important;
  padding: 0 !important;
  list-style: none;
  border-top: 1px solid var(--line);
}

.source-points li {
  position: relative;
  margin: 0 !important;
  padding: 12px 0 12px 28px;
  border-bottom: 1px solid var(--line);
}

.source-points li::before {
  content: "✓";
  position: absolute;
  top: 12px;
  left: 2px;
  color: var(--accent-dark);
  font-weight: 800;
}

.section,
.sidebox,
.page-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 24px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 16px;
}

.article-grid,
.cards-grid,
.comparison-grid,
.review-grid,
.gallery-grid {
  display: grid;
  gap: 16px;
}

.article-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.comparison-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.gallery-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.article-card,
.info-card,
.compare-card,
.review-card,
.gallery-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

.article-card {
  display: flex;
  flex-direction: column;
}

.article-card .card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.article-card .card-body > p:last-child {
  margin-top: auto;
}

.article-card img,
.gallery-card img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.card-body { padding: 16px; }

.meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.badge {
  color: #fff;
  background: var(--accent);
  border-radius: 5px;
  padding: 3px 7px;
  font-size: 12px;
}

.note {
  border-left: 4px solid var(--accent);
  background: #fff7f7;
  padding: 14px 16px;
  border-radius: 6px;
  margin: 14px 0;
}

.fact-list,
.clean-list {
  padding-left: 20px;
  margin: 10px 0 0;
}

.fact-list li,
.clean-list li { margin-bottom: 8px; }

.article-body {
  max-width: none;
  margin-bottom: 0;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: start;
  margin-bottom: 24px;
}

.article-sidebar {
  position: sticky;
  top: 92px;
}

.article-sidebar-inner {
  padding: 22px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.article-sidebar-title {
  display: block;
  margin: 4px 0 14px;
  font-size: 24px;
  line-height: 1.25;
}

.article-toc {
  display: grid;
  border-top: 1px solid var(--line);
}

.article-toc a {
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
}

.article-toc a:hover {
  color: var(--accent-dark);
}

.article-related {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.article-related .eyebrow {
  margin-bottom: 2px;
}

.article-related a {
  position: relative;
  padding-right: 18px;
  color: var(--blue);
  font-size: 14px;
}

.article-related a::after {
  content: "→";
  position: absolute;
  right: 0;
}

.article-body h2 {
  scroll-margin-top: 100px;
}

.article-body h2 {
  padding-top: 18px;
  border-top: 1px solid var(--line);
  margin-top: 30px;
}

.article-body h2:first-child {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.article-body h3 {
  margin-top: 22px;
}

.article-body p,
.article-body li {
  max-width: 82ch;
}

.plain-table {
  margin: 18px 0;
  padding: 18px;
  background: #fbfcfe;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.plain-table p {
  margin: 0 0 14px;
}

.plain-table p:last-child {
  margin-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: #fff;
}

th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
  font-weight: 700;
}

tr:last-child td { border-bottom: 0; }

.faq details {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.faq details:first-child { border-top: 0; }

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.source-list a {
  display: block;
  margin: 6px 0;
}

.source-list ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

.source-list li { margin: 7px 0; }

.footer {
  background: var(--graphite);
  color: #e8ecf1;
  margin-top: 36px;
  padding: 28px 0;
}

.footer a { color: #fff; }

.footer p { max-width: 54ch; }

.footer-nav {
  display: grid;
  gap: 6px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
}

.not-found {
  min-height: 54vh;
  display: grid;
  place-items: center;
  text-align: center;
}

@media (max-width: 980px) {
  .hero-portal,
  .portal-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-grid,
  .comparison-grid,
  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-digest { height: auto; }

  .digest-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }

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

  .article-sidebar {
    position: static;
    order: -1;
  }

  .article-toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 20px;
  }

  .article-related {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-related .eyebrow {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .topbar .container {
    flex-direction: column;
    gap: 4px;
  }

  .header-row {
    grid-template-columns: 1fr auto;
  }

  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav {
    grid-column: 1 / -1;
    grid-row: 2;
    display: none;
    justify-content: start;
    padding-bottom: 14px;
  }

  .menu-toggle {
    grid-column: 2;
    grid-row: 1;
  }

  .nav.is-open { display: flex; }

  .nav a {
    width: calc(50% - 4px);
    background: var(--soft);
  }

  .section,
  .sidebox,
  .page-block,
  .lead-copy,
  .page-intro {
    padding: 18px;
  }

  .article-grid,
  .cards-grid,
  .comparison-grid,
  .review-grid,
    .gallery-grid {
      grid-template-columns: 1fr;
    }

  .home-support-grid {
    grid-template-columns: 1fr;
  }

  .article-toc,
  .article-related {
    grid-template-columns: 1fr;
  }

  .article-sidebar-inner {
    padding: 18px;
  }

  .hero-digest { padding: 18px; }

  .digest-list { grid-template-columns: 1fr; }

  .section-header {
    align-items: start;
    flex-direction: column;
  }
}