/* Technical Articles: archive and article detail. Loaded only on article routes. */
.art-page { min-height: 100vh; color: var(--ink); background: #fff; }
.art-page .c-shell { width: min(calc(100% - 40px), 1180px); margin-inline: auto; }
.art-page .art-hero { padding: clamp(52px, 7vw, 86px) 0 clamp(38px, 5vw, 62px); border-bottom: 1px solid var(--line); background: #fff; }
.art-page .art-kicker { margin: 0; color: #087f6b; font-size: 12px; font-weight: 800; letter-spacing: .12em; line-height: 1.4; text-transform: uppercase; }
.art-page .art-hero h1 { max-width: 900px; margin: 16px 0 0; color: var(--ink); font-size: clamp(40px, 4.6vw, 52px); line-height: 1.12; letter-spacing: -.035em; }
.art-page .art-hero p:last-child { max-width: 760px; margin: 18px 0 0; color: var(--muted); font-size: 17px; line-height: 1.7; }

.art-page .art-center,
.art-page .art-detail { padding: clamp(38px, 5vw, 64px) 0 clamp(52px, 7vw, 84px); background: #fff; }
.art-page .art-center-layout,
.art-page .art-detail-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); align-items: start; gap: 26px; }
.art-page .art-sidebar { position: sticky; top: 128px; min-width: 0; padding: 20px; border: 1px solid var(--line); background: #fff; }
.art-page .art-sidebar > h2 { margin: 0; padding: 0 0 13px; border-bottom: 0; color: var(--ink); font-size: 16px; line-height: 1.35; }
.art-page .art-sidebar > h2 > a { display: inline; color: inherit; font: inherit; text-decoration: none; }
.art-page .art-sidebar nav { margin: 0; }
.art-page .art-sidebar a { color: var(--muted); text-decoration: none; }
.art-page .art-sidebar nav a { display: block; padding: 13px 9px; border-top: 1px solid var(--line); font-size: 15px; font-weight: 600; line-height: 1.4; }
.art-page .art-sidebar nav a:hover,
.art-page .art-sidebar nav a:focus-visible,
.art-page .art-sidebar nav a[aria-current] { color: #087f6b; }
.art-page .art-sidebar nav a[aria-current] { font-weight: 800; }
.art-page .art-sidebar a:focus-visible,
.art-page .art-list-card a:focus-visible,
.art-page .art-back:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

.art-page .art-list { min-width: 0; border: 1px solid var(--line); background: #fff; }
.art-page .art-list-summary { max-width: 760px; margin: 0; padding: 0 0 24px; color: var(--muted); font-size: 16px; line-height: 1.7; }
.art-page .art-list-card { padding: 18px 28px; border-bottom: 1px solid var(--line); }
.art-page .art-list-card:last-child { border-bottom: 0; }
.art-page .art-list-card small,
.art-page .art-article-header small { display: block; color: #087f6b; font-size: 12px; font-weight: 800; letter-spacing: .1em; line-height: 1.4; text-transform: uppercase; }
.art-page .art-list-card h2 { margin: 7px 0 0; font-size: 24px; line-height: 1.32; letter-spacing: -.02em; overflow-wrap: anywhere; }
.art-page .art-list-card h2 > a { display: inline; margin: 0; padding: 0; border: 0; color: var(--ink); font: inherit; text-decoration: none; }
.art-page .art-list-card h2 > a:hover,
.art-page .art-list-card h2 > a:focus-visible { color: var(--blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.art-page .art-list-card p { max-width: 780px; margin: 11px 0 0; color: var(--muted); font-size: 16px; line-height: 1.7; }
.art-page .art-read-link,
.art-page .art-back { display: inline-flex; align-items: center; gap: 8px; margin-top: 16px; color: var(--blue); font-size: 13px; font-weight: 800; line-height: 1.4; text-decoration: none; text-transform: uppercase; }
.art-page .art-read-link:hover,
.art-page .art-back:hover { color: #087f6b; text-decoration: underline; text-underline-offset: 4px; }

.art-page .art-article { min-width: 0; padding: 32px 44px 40px; border: 1px solid var(--line); background: #fff; }
.art-page .art-article-header { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.art-page .art-article-header h1 { max-width: 920px; margin: 10px 0 0; color: var(--ink); font-size: clamp(36px, 4.25vw, 50px); line-height: 1.14; letter-spacing: -.035em; overflow-wrap: anywhere; }
.art-page .art-article-header p { max-width: 800px; margin: 16px 0 0; color: var(--muted); font-size: 17px; line-height: 1.7; }
.art-page .art-body { min-width: 0; max-width: 920px; padding-top: 30px; color: var(--ink); font-size: 16px; line-height: 1.82; overflow-wrap: anywhere; }
.art-page .art-body > * { max-width: 100%; }
.art-page .art-body h2,
.art-page .art-body h3,
.art-page .art-body h4 { color: var(--ink); line-height: 1.28; overflow-wrap: anywhere; }
.art-page .art-body h2 { margin: 2.2em 0 .65em; font-size: clamp(26px, 2.6vw, 34px); }
.art-page .art-body h3 { margin: 2em 0 .6em; font-size: clamp(21px, 2.1vw, 26px); }
.art-page .art-body h4 { margin: 1.8em 0 .55em; font-size: 18px; }
.art-page .art-body p,
.art-page .art-body ul,
.art-page .art-body ol { margin: 0 0 1.25em; }
.art-page .art-body ul,
.art-page .art-body ol { padding-left: 1.35em; }
.art-page .art-body li + li { margin-top: .45em; }
.art-page .art-body a { color: var(--blue); font-weight: 700; }
.art-page .art-body a:hover { color: #087f6b; }
.art-page .art-body blockquote { margin: 2em 0; padding: .35em 0 .35em 1.25em; border-left: 3px solid #087f6b; color: var(--muted); font-size: 1.05em; }
.art-page .art-body blockquote > :last-child { margin-bottom: 0; }
.art-page .art-body img { display: block; height: auto; max-width: 100%; }
.art-page .art-body figure { max-width: 100%; margin: 2em 0; }
.art-page .art-body figure.art-data-table { overflow-x: auto; }
.art-page .art-body figure.art-data-table img { max-width: none; }
.art-page .art-body figure.art-data-table figcaption { margin: 0 0 .6em; }
.art-page .art-body figure.art-wide-figure { overflow-x: auto; }
.art-page .art-body figure.art-wide-figure img { width: 100%; max-width: none; }
.art-page .art-body figure.art-wide-figure figcaption { margin: 0 0 .6em; }
.art-page .art-body figcaption { margin-top: .5em; color: var(--muted); font-size: 14px; line-height: 1.55; }
.art-page .art-body table { display: block; width: 100%; max-width: 100%; margin: 2em 0; overflow-x: auto; border-collapse: collapse; font-size: 14px; line-height: 1.6; }
.art-page .art-body th,
.art-page .art-body td { min-width: 130px; padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.art-page .art-body th { color: var(--ink); font-weight: 800; }
.art-page .art-back { margin-top: 22px; }

@media (max-width: 820px) {
  .art-page .art-center-layout,
  .art-page .art-detail-layout { grid-template-columns: 1fr; gap: 30px; }
  .art-page .art-sidebar { position: static; }
  .art-page .art-sidebar nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 20px; }
  .art-page .art-sidebar nav a { min-width: 0; }
}

@media (max-width: 560px) {
  .art-page .c-shell { width: min(calc(100% - 30px), 1180px); }
  .art-page .art-hero { padding: 46px 0 34px; }
  .art-page .art-hero h1 { font-size: 40px; }
  .art-page .art-hero p:last-child,
  .art-page .art-article-header p { font-size: 16px; }
  .art-page .art-center,
  .art-page .art-detail { padding: 32px 0 52px; }
  .art-page .art-list-card { padding: 20px; }
  .art-page .art-list-card h2 { font-size: 25px; }
  .art-page .art-sidebar nav { gap: 0 14px; }
  .art-page .art-sidebar nav a { padding: 11px 0; font-size: 14px; }
  .art-page .art-article { padding: 26px 20px 34px; }
  .art-page .art-article-header h1 { font-size: 36px; }
  .art-page .art-body { padding-top: 24px; font-size: 16px; line-height: 1.75; }
  .art-page .art-body h2 { font-size: 27px; }
  .art-page .art-body h3 { font-size: 22px; }
  .art-page .art-body figure.art-wide-figure img { width: 1000px; }
}