/* AdRegion Knowledge Base */

:root {
  --color-accent: #017387;
  --color-accent-dark: #005d6d;
  --color-bg: #f0f1f7;
  --color-bg-secondary: #f0f1f7;
  --color-bg-white: #fcfdff;
  --color-text: #4a514c;
  --color-text-sub: #616161;
  --color-text-muted: #78807a;
  --color-border: #e2e4e3;
  --color-border-light: #f0f1f7;
  --color-brand-dark: #616161;
  --color-success: #2d866f;
  --color-warning: #b26b18;
  --color-error: #b84040;
  --font-mono: 'SFMono-Regular', 'Consolas', 'Menlo', monospace;
  --transition: .25s cubic-bezier(.4, .4, 0, 1);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg-white);
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .035em;
  overflow-wrap: break-word;
  line-break: strict;
}

a { text-underline-offset: .2em; }

/* Keep the shortcut navigation identical to the corporate pages at every width. */
.site-header__shortcuts { font-size: 14px; }

.knowledge-footer-brand img {
  display: block;
  width: 100%;
  height: auto;
}

/* Layout */
.article-container {
  width: min(900px, 100%);
  min-height: 300px;
  margin: 0 auto;
  padding: 54px 24px 78px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin-bottom: 28px;
  color: var(--color-text-muted);
  font-size: .75rem;
}
.breadcrumb a { color: var(--color-accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-sep { color: #c5c5c5; }

.content-heading { margin: 0 0 26px; }
.content-heading-en {
  margin: 0 0 4px;
  color: var(--color-accent);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.content-heading h1 {
  margin: 0;
  color: var(--color-brand-dark);
  font-size: 2rem;
  line-height: 1.4;
  letter-spacing: .02em;
}

/* Article header */
.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}
.article-title {
  margin: 0 0 18px;
  color: var(--color-brand-dark);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: .015em;
  word-break: auto-phrase;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .7rem 2rem;
  color: var(--color-text-sub);
  font-size: .8125rem;
}
.article-meta__taxonomy,
.article-meta__details {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}
.article-meta__taxonomy { min-width: 0; }
.article-meta__details {
  justify-content: flex-end;
  gap: .7rem;
  margin-left: auto;
}
.article-meta time { font-variant-numeric: tabular-nums; }
.article-reading-time-sep { color: var(--color-text-muted); }
.article-tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.article-tag {
  display: inline-block;
  padding: .16rem .68rem;
  background: var(--color-bg-secondary);
  border-radius: 999px;
  color: var(--color-text-sub);
  font-size: .72rem;
  text-decoration: none;
}
.article-tag--cat {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
}
.article-tag--cat:hover { background: var(--color-accent-dark); }

/* Article list */
.knowledge-index-page .article-container { width: min(1296px, 100%); }
.article-list { display: grid; gap: 44px; }
.article-index-group { min-width: 0; }
.article-index-group-heading {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 0 0 8px;
  border-bottom: 2px solid var(--color-accent);
}
.article-index-group-heading h2 {
  margin: 0;
  color: var(--color-brand-dark);
  font-size: 1.45rem;
  line-height: 1.4;
  letter-spacing: .03em;
}
.article-index-group-heading span { color: var(--color-text-sub); font-size: .75rem; }
.article-index-row {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 1fr);
  gap: 42px;
  padding: 20px 18px;
  border-bottom: 1px solid var(--color-border);
}
.article-index-main { min-width: 0; }
.article-index-main h3 { margin: 0; font-size: 1rem; line-height: 1.55; }
.article-index-main h3 a {
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: none;
  text-decoration-thickness: 1px;
  transition: color var(--transition);
}
.article-index-main h3 a:hover { color: var(--color-accent-dark); text-decoration: underline; }
.article-index-main h3 a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }
.article-index-main p {
  margin: 6px 0 0;
  color: var(--color-text-sub);
  font-size: .8125rem;
  line-height: 1.75;
}
.article-index-meta {
  display: grid;
  align-content: center;
  gap: 8px;
  margin: 0;
  padding-left: 38px;
  border-left: 1px solid var(--color-border);
  color: var(--color-text-sub);
  font-size: .75rem;
}
.article-index-meta > div { display: grid; grid-template-columns: 5.4rem minmax(0, 1fr); gap: 8px; }
.article-index-meta dt { color: var(--color-text); font-weight: 700; }
.article-index-meta dd { min-width: 0; margin: 0; }
.article-index-meta time { font-variant-numeric: tabular-nums; }
.article-index-tag-sep { margin: 0 .22em; color: var(--color-text-muted); }

/* Category filter */
.tag-filter {
  display: flex;
  flex-wrap: nowrap;
  gap: 42px;
  margin-bottom: 38px;
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-color: rgba(1,115,135,.38) transparent;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.tag-filter::-webkit-scrollbar { height: 4px; }
.tag-filter::-webkit-scrollbar-track { background: transparent; }
.tag-filter::-webkit-scrollbar-thumb { background: rgba(1,115,135,.38); }
.tag-filter-item {
  display: inline-flex;
  flex: 0 0 auto;
  min-height: 42px;
  align-items: center;
  margin-bottom: -1px;
  padding: .35rem .25rem .65rem;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  color: var(--color-text-sub);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--transition), color var(--transition);
}
.tag-filter-item:not(.is-active):hover { border-bottom-color: rgba(1,115,135,.4); color: var(--color-accent); }
.tag-filter-item.is-active { border-bottom-color: var(--color-accent); color: var(--color-accent); }
.tag-filter-item:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
/* Table of contents */
.toc {
  margin: 28px 0 36px;
  padding: 22px 26px;
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  font-size: .875rem;
}
.toc-title {
  margin: 0 0 .65rem;
  color: var(--color-accent);
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.toc ol, .toc ul { margin: 0; padding-left: 1.25rem; }
.toc li { margin: .3rem 0; }
.toc a { color: var(--color-text); text-decoration: none; }
.toc a:hover { color: var(--color-accent); }
.toc .toc-h3 { margin-left: 1.25em; color: var(--color-text-sub); font-size: .8125rem; }

/* Article body */
.article-body {
  color: var(--color-text);
  font-size: 1.0625rem;
  line-height: 1.9;
  letter-spacing: .035em;
  overflow-wrap: anywhere;
  word-break: normal;
}
.article-body h2 {
  margin: 3.2rem 0 1.1rem;
  padding: 12px 0 12px 18px;
  border-left: 5px solid var(--color-accent);
  color: var(--color-brand-dark);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.55;
}
.article-body h3 {
  margin: 2.3rem 0 .9rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-brand-dark);
  font-size: 1.15rem;
  font-weight: 700;
}
.article-body h4 { margin: 1.8rem 0 .6rem; font-size: 1rem; font-weight: 700; }
.article-body p { margin: 0 0 1.1rem; }
.article-body ul, .article-body ol { margin: 0 0 1.35rem; padding-left: 1.6rem; }
.article-body li { margin: .4rem 0; }
.article-body li::marker { color: var(--color-accent); font-weight: 700; }
.article-body li ul, .article-body li ol { margin-bottom: 0; }
.article-body blockquote {
  margin: 1.4rem 0;
  padding: 1rem 1.25rem;
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  color: var(--color-text-sub);
}
.article-body hr { margin: 2.5rem 0; border: none; border-top: 1px solid var(--color-border); }
.article-body img { max-width: 100%; height: auto; margin: .75rem 0; border-radius: 8px; }
.article-body a { color: var(--color-accent); }
.article-body a:hover { text-decoration-thickness: 2px; }
.article-body strong { color: var(--color-brand-dark); font-weight: 700; }

/* Code and tables */
.article-body code {
  padding: .1em .4em;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: .875em;
}
.article-body pre {
  margin: 1.25rem 0;
  padding: 1.15rem 1.3rem;
  background: #222;
  border-radius: 8px;
  line-height: 1.65;
  overflow-x: auto;
}
.article-body pre code { padding: 0; background: none; border: none; color: #f1f1f1; font-size: .8125rem; }
.article-body .table-wrap { margin: 1.25rem 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.article-body table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.article-body th {
  padding: .65rem .8rem;
  background: #edf5f6;
  border: 1px solid #d3e6e8;
  color: var(--color-accent-dark);
  font-weight: 600;
  text-align: left;
}
.article-body td { padding: .6rem .8rem; border: 1px solid var(--color-border); vertical-align: top; }

/* Author profile */
.article-author { margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--color-border); }
.article-author-heading {
  margin: 0 0 14px;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.article-author-card {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 6px 22px;
  align-items: center;
  padding: 22px 24px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: 10px;
}
.article-author-image {
  width: 104px;
  height: 104px;
  grid-row: 1 / 4;
  object-fit: cover;
  border-radius: 50%;
}
.article-author-identity { min-width: 0; }
.article-author-name { margin: 0; color: var(--color-brand-dark); font-size: 1rem; font-weight: 700; }
.article-author-role { margin: 2px 0 0; color: var(--color-accent-dark); font-size: .75rem; font-weight: 600; }
.article-author-bio { margin: 0; color: var(--color-text-sub); font-size: .84rem; line-height: 1.75; }
.article-author-link {
  justify-self: start;
  color: var(--color-accent-dark);
  font-size: .78rem;
  font-weight: 700;
  text-decoration: none;
}
.article-author-link:hover { text-decoration: underline; }

/* Article resources and related reading */
.article-resources,
.related-articles { margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--color-border); }
.article-resources-title,
.related-articles-title {
  margin: 0 0 14px;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.article-resources-list {
  display: grid;
  gap: .45rem;
  margin: 0;
  padding-left: 1.15rem;
  color: var(--color-text-muted);
}
.article-resources-list a {
  color: var(--color-accent-dark);
  font-size: .875rem;
  line-height: 1.65;
  text-underline-offset: .2em;
}
.article-resources-list a:hover { text-decoration-thickness: 2px; }
.related-articles-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.related-article-link {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: .45rem;
  padding: 18px 20px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}
.related-article-link:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.related-article-category { color: var(--color-accent-dark); font-size: .75rem; font-weight: 700; }
.related-article-title { font-size: .975rem; font-weight: 700; line-height: 1.6; }
.related-article-description {
  display: -webkit-box;
  overflow: hidden;
  color: var(--color-text-sub);
  font-size: .8rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.article-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 48px;
  padding-top: 26px;
  border-top: 1px solid var(--color-border);
}
.article-nav a {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  gap: .35rem;
  padding: 16px 18px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}
.article-nav a:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.article-nav-label { color: var(--color-text-muted); font-size: .75rem; font-weight: 600; }
.article-nav-title { font-size: .875rem; font-weight: 700; line-height: 1.65; }
.article-nav .next { text-align: right; }
.article-nav .is-empty { visibility: hidden; }
.md-link { display: inline-flex; align-items: center; gap: .35rem; color: var(--color-text-sub); font-size: .8rem; text-decoration: none; }
.md-link:hover { color: var(--color-accent); }
.md-link svg { width: 13px; height: 13px; flex-shrink: 0; }

.article-nav a:focus-visible {
  outline: 3px solid rgba(1, 115, 135, .35);
  outline-offset: 3px;
}
.visually-hidden { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }

/* Footer */
.knowledge-footer { padding: 42px 32px 34px; border-top: 1px solid var(--color-border); background: var(--color-bg-white); color: var(--color-text); }
.knowledge-footer-inner { width: min(1260px, 100%); margin: 0 auto; }
.knowledge-footer-brand { display: inline-flex; width: 184px; }
.knowledge-footer-nav { display: flex; flex-wrap: wrap; gap: 18px 28px; margin-top: 26px; }
.knowledge-footer-nav a { color: var(--color-text-sub); font-size: .8rem; text-decoration: none; }
.knowledge-footer-nav a:hover { color: var(--color-accent); }
.knowledge-copyright { margin: 30px 0 0; color: var(--color-text-muted); font-size: .75rem; }

/* Error */
.error-page { padding-top: 72px; padding-bottom: 96px; text-align: center; }
.error-page h1 { margin: 0; color: var(--color-brand-dark); font-size: 5rem; line-height: 1; }
.error-page p:not(.content-heading-en) { color: var(--color-text-sub); }
.error-page-link { display: inline-flex; margin-top: 20px; padding: 10px 24px; background: #000; border-radius: 999px; color: #fff; font-weight: 700; text-decoration: none; }

@media (max-width: 700px) {
  .article-container { padding: 36px 18px 58px; }
  .breadcrumb { margin-bottom: 22px; }
  .content-heading { margin-bottom: 22px; }
  .content-heading h1 { font-size: 1.6rem; }
  .article-title { font-size: 1.55rem; }
  .article-meta { flex-direction: column; align-items: flex-start; }
  .article-meta__taxonomy,
  .article-meta__details { width: 100%; justify-content: flex-start; }
  .article-meta__details {
    flex-wrap: nowrap;
    gap: clamp(.32rem, 1.5vw, .5rem);
    margin-left: 0;
    font-size: clamp(.65rem, 3vw, .75rem);
    white-space: nowrap;
  }
  .article-meta__details .md-link { gap: .2rem; font-size: inherit; }
  .article-meta__details .md-link svg { width: 11px; height: 11px; }
  .tag-filter {
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 30px;
  }
  .tag-filter-item {
    min-height: 39px;
    padding-right: 0;
    padding-left: 0;
    font-size: .66rem;
    letter-spacing: .015em;
  }
  .article-list { gap: 34px; }
  .article-index-group-heading h2 { font-size: 1.25rem; }
  .article-index-row { grid-template-columns: 1fr; gap: 14px; padding: 18px 2px; }
  .article-index-main h3 { font-size: .98rem; }
  .article-index-meta { gap: 5px; padding-left: 0; border-left: 0; font-size: .7rem; }
  .article-index-meta > div { grid-template-columns: 5rem minmax(0, 1fr); }
  .article-body { font-size: 1rem; line-height: 1.9; }
  .article-body .table-wrap--wide table { min-width: 42rem; }
  .article-body h2 { margin-top: 2.6rem; padding-left: 14px; font-size: 1.28rem; }
  .article-body h3 { font-size: 1.08rem; }
  .toc { padding: 18px 20px; }
  .article-author-card { grid-template-columns: 76px minmax(0, 1fr); gap: 5px 16px; padding: 18px; }
  .article-author-image { width: 76px; height: 76px; grid-row: auto; }
  .article-author-bio,
  .article-author-link { grid-column: 1 / -1; }
  .article-author-bio { margin-top: 10px; }
  .article-author-link { margin-top: 4px; }
  .related-articles-list { grid-template-columns: 1fr; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav .next { text-align: left; }
  .article-nav .is-empty { display: none; }
  .knowledge-footer { padding: 36px 20px 30px; }
  .knowledge-footer-brand { width: 158px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}