/* =========================================================
   ARTICLE LAYOUT V2 — CENTERED READING + STICKY SIDE RAILS
   Inspired by the spatial principle seen in the supplied
   Cloudflare reference, while preserving this site's own
   visual language and locked typography.
   ========================================================= */

.article-page{
  --article-v2-side:220px;
  --article-v2-main:760px;
  --article-v2-gap:40px;
}

/* The full article system is centered as one composition:
   left utility rail + reading column + right TOC rail. */
.article-page .article-shell{
  width:min(100% - 48px,1280px);
  margin-inline:auto;
}

/* Header aligns to the SAME centered reading column as the body. */
.article-page .article-header{
  max-width:none;
  width:100%;
  display:grid;
  grid-template-columns:
    var(--article-v2-side)
    minmax(0,var(--article-v2-main))
    var(--article-v2-side);
  column-gap:var(--article-v2-gap);
  padding:72px 0 var(--space-5);
}

.article-page .article-header > *{
  grid-column:2;
  min-width:0;
}

.article-page .article-title,
.article-page .article-deck{
  max-width:none;
}

/* Desktop: three-column reading environment. */
.article-page .article-layout{
  display:grid;
  grid-template-columns:
    var(--article-v2-side)
    minmax(0,var(--article-v2-main))
    var(--article-v2-side);
  column-gap:var(--article-v2-gap);
  align-items:start;
  padding-bottom:var(--space-5);
}

.article-page .article-body{
  grid-column:2;
  width:100%;
  max-width:none;
  min-width:0;
}

/* Left utility — low-left and footer-safe.
   Sticky keeps it in the article area and lets it stop before the footer.
   Article typography, spacing, width, and the right TOC rail are untouched. */
.article-page .article-utility{
  grid-column:1;
  position:sticky;
  top:calc(100vh - 220px);
  align-self:start;
  width:190px;
  z-index:20;
}

.article-page .article-utility-card{
  width:100%;
  max-width:none;
  margin:0;
  padding:0;
  border:0;
  background:transparent;
  box-shadow:none;
}

.article-page .article-utility-label{
  margin:0 0 8px;
  color:var(--text);
  font-size:16px;
  font-weight:700;
  line-height:1.3;
}

.article-page .article-utility-copy{
  margin:0 0 12px;
  color:var(--muted);
  font-size:14px;
  line-height:1.55;
}

.article-page .article-utility-nav{
  display:grid;
  gap:6px;
}

.article-page .article-utility-nav a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  width:max-content;
  color:var(--accent);
  font-size:14px;
  font-weight:650;
  line-height:1.35;
  text-decoration:none;
}

.article-page .article-utility-nav a:hover{
  text-decoration:underline;
  text-underline-offset:3px;
}

.article-page .article-utility .socials{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:18px;
}

/* Right rail — existing "On this page" remains sticky,
   but gets a clearer rail treatment instead of floating
   in a large empty zone. */
.article-page .article-aside{
  grid-column:3;
  position:sticky;
  top:106px;
  align-self:start;
  width:100%;
  max-width:220px;
  padding:16px 0 16px 16px;
  border-left:1px solid var(--line);
}

.article-page .article-aside h3{
  margin:0 0 14px;
  font-size:16px;
  line-height:1.3;
}

.article-page .article-aside nav{
  display:grid;
  gap:10px;
}

.article-page .article-aside a{
  position:relative;
  color:var(--muted);
  font-size:14px;
  line-height:1.45;
  text-decoration:none;
}

.article-page .article-aside a:hover{
  color:var(--accent);
}

/* Keep long article elements contained inside the reading column. */
.article-page .article-table-wrap,
.article-page .article-figure,
.article-page .article-callout,
.article-page .article-pullquote{
  max-width:100%;
}

/* Medium widths: keep the article centered and preserve the useful
   right TOC rail; remove the secondary left utility rail first. */
@media(max-width:1180px){
  .article-page .article-shell{
    width:min(100% - 48px,1040px);
  }

  .article-page .article-header{
    grid-template-columns:minmax(0,760px) 220px;
    column-gap:40px;
    justify-content:center;
  }

  .article-page .article-header > *{
    grid-column:1;
  }

  .article-page .article-layout{
    grid-template-columns:minmax(0,760px) 220px;
    column-gap:40px;
    justify-content:center;
  }

  .article-page .article-utility{
    display:none;
  }

  .article-page .article-body{
    grid-column:1;
  }

  .article-page .article-aside{
    grid-column:2;
  }
}

/* Tablet/mobile: one calm reading column.
   TOC becomes a normal block above the article; no sticky side rails. */
@media(max-width:900px){
  .article-page .article-shell{
    width:min(100% - 40px,760px);
  }

  .article-page .article-header{
    display:block;
    padding:56px 0 var(--space-5);
  }

  .article-page .article-layout{
    display:flex;
    flex-direction:column;
    gap:var(--space-5);
  }

  .article-page .article-body{
    order:2;
    width:100%;
  }

  .article-page .article-aside{
    order:1;
    position:static;
    width:100%;
    max-width:none;
    padding:16px 18px;
    border:1px solid var(--line);
    border-radius:16px;
    background:var(--panel);
  }
}

@media(max-width:620px){
  .article-page .article-shell{
    width:min(100% - 32px,760px);
  }
}


/* Editorial article-image containment — V1 final. */
/* Main editorial visuals stay inside the 760px reading column and keep 16:9 proportion. */
.article-page .article-editorial-visual{
  width:100%;
  max-width:100%;
  margin:0 0 var(--space-5);
  box-sizing:border-box;
}
.article-page .article-editorial-visual img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  aspect-ratio:16/9;
  object-fit:contain;
  box-sizing:border-box;
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--panel);
}
.article-page .article-editorial-visual .article-caption{
  margin-top:var(--space-2);
}