/* Knowledge articles: an open reading column with a separate navigation rail. */
.guide-article-page:not(.service-page) .article-hero {
  padding-block: clamp(2rem, 4vw, 4rem) var(--section-space);
  background: var(--brand-900);
  border-bottom: 1px solid var(--ui-border);
  text-align: center;
}

.guide-article-page:not(.service-page) .article-hero .article-container {
  max-width: 64rem;
}

.guide-article-page:not(.service-page) .article-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: .4rem .65rem;
  margin-bottom: 2.5rem;
  color: var(--ui-muted);
  font-size: 1rem;
}

.guide-article-page:not(.service-page) .article-breadcrumbs a {
  color: var(--ui-muted);
  text-underline-offset: .22em;
}

.guide-article-page:not(.service-page) .article-breadcrumbs a:hover {
  color: var(--ui-accent);
}

.guide-article-page:not(.service-page) .article-hero h1 {
  max-width: 58rem;
  margin: .75rem auto 1.5rem;
  font-size: clamp(2.25rem, 4.4vw, 4rem);
  line-height: 1.12;
  letter-spacing: -.045em;
  text-align: center;
  overflow-wrap: anywhere;
}

.guide-article-page:not(.service-page) .article-lead {
  max-width: var(--reading-max);
  margin: 0 auto;
  color: var(--ui-muted);
  font-size: clamp(1.0625rem, 1.5vw, 1.1875rem);
  line-height: 1.75;
  text-align: center;
}

.article-body {
  display: grid;
  grid-template-columns: 14rem minmax(0, var(--reading-max));
  justify-content: center;
  align-items: start;
  gap: 3rem;
  max-width: 64rem;
  padding-block: var(--section-space);
}

.article-toc {
  position: sticky;
  top: 7rem;
  display: grid;
  gap: .25rem;
  max-height: calc(100dvh - 8rem);
  overflow-y: auto;
  padding-right: 1rem;
  border-right: 1px solid var(--ui-border);
  font-size: 1rem;
  text-align: left;
}

.article-toc strong {
  margin-bottom: .75rem;
  color: var(--ui-text);
}

.article-toc a {
  min-height: 2.75rem;
  padding: .5rem .625rem;
  border-radius: var(--radius-button);
  color: var(--ui-muted);
  line-height: 1.5;
  text-decoration: none;
}

.article-toc a:hover,
.article-toc a:focus-visible {
  background: var(--ui-surface);
  color: var(--ui-accent);
  text-decoration: none;
  text-underline-offset: .2em;
}

.article-content {
  min-width: 0;
  max-width: var(--reading-max);
  font-size: 1rem;
  line-height: 1.8;
  text-align: left;
}

.article-content > section + section {
  margin-top: 3.5rem;
}

.article-content h2 {
  margin: 0 0 1.5rem;
  color: var(--ui-text);
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -.03em;
  text-align: left;
  overflow-wrap: anywhere;
}

.article-content h3 {
  margin: 1.75rem 0 .75rem;
  color: var(--ui-text);
  font-size: 1.25rem;
  line-height: 1.4;
  text-align: left;
  overflow-wrap: anywhere;
}

.article-content p {
  margin: 0 0 1.25rem;
  color: var(--ui-muted);
}

.article-content ul,
.article-content ol {
  margin: 1.25rem 0;
  padding-left: 1.5rem;
}

.article-content li + li {
  margin-top: .65rem;
}

.article-content li::marker {
  color: var(--ui-accent);
  font-weight: 600;
}

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

.article-content a:not([class]) {
  color: var(--ui-accent);
  text-underline-offset: .2em;
  overflow-wrap: anywhere;
}

.article-highlight {
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--ui-surface);
  border-left: 3px solid var(--ui-accent);
  border-radius: 0 var(--radius-button) var(--radius-button) 0;
}

.article-highlight h2 {
  font-size: 1.5rem;
}

.article-highlight > :last-child {
  margin-bottom: 0;
}

.article-columns,
.article-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  margin-top: 1.5rem;
}

.article-columns > div,
.article-comparison > div {
  min-width: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--ui-border);
}

.article-columns h3,
.article-comparison h3 {
  margin-top: 0;
}

.article-columns p,
.article-comparison p {
  margin-bottom: 0;
  text-align: left;
}

@media (min-width: 44.001rem) {
  :is(.article-columns, .article-comparison):not(:has(> div > :nth-child(3))) {
    row-gap: 0;
  }
  :is(.article-columns, .article-comparison):not(:has(> div > :nth-child(3))) > div {
    display: grid;
    grid-row: span 2;
    grid-template-rows: subgrid;
    row-gap: 0;
    align-content: start;
    margin-bottom: 1.5rem;
  }
  .article-related-links:has(> :nth-child(3):last-child) a {
    grid-row: span 2;
    grid-template-rows: subgrid;
    align-content: start;
  }
}

.article-definitions {
  margin: 0;
}

.article-definitions > div {
  display: grid;
  grid-template-columns: minmax(8rem, 1fr) minmax(0, 2fr);
  gap: 1.5rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--ui-border);
}

.article-definitions dt {
  color: var(--ui-text);
  font-weight: 700;
}

.article-definitions dd {
  margin: 0;
  color: var(--ui-muted);
}

.article-content .article-checklist {
  padding-left: 1.5rem;
  list-style: disc;
}

.article-content .article-steps {
  padding-left: 1.75rem;
}

.article-steps li {
  padding-left: .5rem;
}

.article-warning {
  margin-top: 1.5rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--ui-border);
}

.article-warning h3 {
  margin-top: 0;
  color: var(--ui-accent);
}

.article-warning p {
  margin-bottom: 0;
}

.article-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  margin-top: 2rem;
  border: 1px solid var(--ui-border);
  border-radius: var(--radius-button);
  overscroll-behavior-x: contain;
}

.article-table-wrap table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  font-size: 1rem;
  line-height: 1.6;
  text-align: left;
}

.article-table-wrap th,
.article-table-wrap td {
  padding: 1rem;
  border-bottom: 1px solid var(--ui-border);
  vertical-align: top;
}

.article-table-wrap th {
  background: var(--ui-surface);
  color: var(--ui-text);
  font-weight: 700;
}

.article-table-wrap td {
  color: var(--ui-muted);
}

.article-table-wrap tbody tr:last-child td {
  border-bottom: 0;
}

.article-content details {
  border-bottom: 1px solid var(--ui-border);
}

.article-content summary {
  text-align: left;
  padding: 1.25rem 2.5rem;
  color: var(--ui-text);
  font-weight: 700;
  cursor: pointer;
}

.article-content summary::marker {
  color: var(--ui-accent);
}

.article-content details[open] summary {
  color: var(--ui-accent);
}

.article-content details p {
  text-align: left;
  margin-bottom: 1.5rem;
}

.article-related {
  padding-block: 2rem;
  border-block: 1px solid var(--ui-border);
  text-align: left;
}

.article-related-links {
  display: grid;
  gap: .75rem;
}

.article-related-links a {
  display: grid;
  gap: .4rem;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--ui-border);
  border-radius: var(--radius-button);
  background: var(--brand-900);
  color: var(--ui-text);
  text-decoration: none;
}

.article-related-links a:is(:hover, :focus-visible) {
  background: var(--ui-surface);
}

.article-related-links span {
  color: var(--ui-muted);
}

.article-related-links a:hover strong {
  color: var(--ui-accent);
  text-decoration: none;
  text-underline-offset: .2em;
}

.article-final-cta {
  padding-block: var(--section-space);
  background: var(--brand-900);
  border-top: 1px solid var(--ui-border);
  text-align: center;
}

.article-final-cta h2 {
  max-width: 55rem;
  margin: 0 auto 1.5rem;
  font-size: clamp(1.875rem, 3vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -.035em;
  overflow-wrap: anywhere;
}

.article-final-cta p {
  max-width: var(--reading-max);
  margin: 0 auto 2rem;
  color: var(--ui-muted);
  font-size: 1rem;
  line-height: 1.75;
}

@media (max-width: 64rem) {
  .article-body {
    grid-template-columns: minmax(0, var(--reading-max));
    gap: 3rem;
  }

  .article-toc {
    position: static;
    max-height: none;
    padding: 0 0 1.5rem;
    border-right: 0;
    border-bottom: 1px solid var(--ui-border);
  }
}

@media (max-width: 44rem) {
  .article-columns,
  .article-comparison,
  .article-definitions > div {
    grid-template-columns: minmax(0, 1fr);
    gap: .75rem;
  }

  .article-columns,
  .article-comparison {
    gap: 1.5rem;
  }

  .article-content > section + section {
    margin-top: 3rem;
  }
}

.article-content h2.article-heading--key { color: var(--ui-accent); }
@media (min-width: 44.001rem) {
  .article-columns:has(> :nth-child(3):last-child),
  .article-comparison:has(> :nth-child(3):last-child),
  .article-related-links:has(> :nth-child(3):last-child) { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
}