/**
 * Blog longform layout — prose stays narrow; tables/calcs break out; sticky TOC.
 * Opt-in via blog-toc.js wrapping <article class="article">.
 */
.article-layout {
  --blog-prose: 680px;
  --blog-breakout: 56px;
  --blog-toc-w: 200px;
  --blog-shell: 1040px;
  --blog-gap: 36px;
  max-width: min(var(--blog-shell), 100%);
  margin: 0 auto;
  padding: 64px 32px 80px;
  display: grid;
  grid-template-columns: minmax(0, var(--blog-prose)) minmax(0, var(--blog-toc-w));
  column-gap: var(--blog-gap);
  align-items: start;
  justify-content: center;
  position: relative;
  z-index: 1;
  box-sizing: border-box;
}

.article-layout > article.article {
  max-width: var(--blog-prose) !important;
  width: 100%;
  margin: 0 !important;
  padding: 0 !important;
  position: relative;
  z-index: 1;
  overflow: visible;
  justify-self: stretch;
}

.article-layout .article h2,
.article-layout .article h3 {
  scroll-margin-top: 96px;
}

/*
 * Symmetric breakout: center on the prose column via left/transform.
 * Avoids asymmetric used-width from width+negative-margin + scrollbar.
 */
.article-layout .breakout,
.article-layout .table-wrap,
.article-layout .calculator,
.article-layout .calc,
.article-layout .stats-summary,
.article-layout .formula,
.article-layout pre,
.article-layout .code-block,
.article-layout [data-breakout] {
  --blog-breakout-w: calc(100% + (2 * var(--blog-breakout)));
  width: var(--blog-breakout-w);
  max-width: var(--blog-breakout-w);
  margin-left: 0;
  margin-right: 0;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  box-sizing: border-box;
}

/* Sticky TOC — never spill past the shell */
.article-toc {
  position: sticky;
  top: 88px;
  padding-top: 4px;
  max-height: calc(100dvh - 112px);
  max-width: 100%;
  min-width: 0;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: thin;
  box-sizing: border-box;
}

.article-toc__title {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim, #6B6B73);
  margin: 0 0 14px;
}

.article-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--border-strong, rgba(255, 255, 255, 0.16));
  min-width: 0;
}

.article-toc__link {
  display: block;
  padding: 6px 0 6px 12px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 0.8rem;
  line-height: 1.35;
  color: var(--fg-muted, #9AA0A6);
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.article-toc__link:hover {
  color: var(--fg, #F2F3F4);
  text-decoration: none;
}

.article-toc__link.is-active {
  color: var(--fg, #F2F3F4);
  border-left-color: var(--accent, #B4E04A);
  font-weight: 600;
}

/* Below TOC breakpoint: hide TOC, keep prose centered (narrow) */
@media (max-width: 1100px) {
  .article-layout {
    display: block;
    max-width: calc(var(--blog-prose) + 64px);
    padding: 56px 28px 72px;
  }
  .article-toc {
    display: none !important;
  }
  .article-layout > article.article {
    max-width: var(--blog-prose) !important;
    margin: 0 auto !important;
  }
  .article-layout .breakout,
  .article-layout .table-wrap,
  .article-layout .calculator,
  .article-layout .calc,
  .article-layout .stats-summary,
  .article-layout .formula,
  .article-layout pre,
  .article-layout .code-block,
  .article-layout [data-breakout] {
    --blog-breakout: 40px;
  }
}

@media (max-width: 640px) {
  .article-layout {
    padding: 44px 18px 56px;
  }
  .article-layout .breakout,
  .article-layout .table-wrap,
  .article-layout .calculator,
  .article-layout .calc,
  .article-layout .stats-summary,
  .article-layout .formula,
  .article-layout pre,
  .article-layout .code-block,
  .article-layout [data-breakout] {
    width: 100%;
    max-width: 100%;
    left: auto;
    transform: none;
    margin-left: 0;
    margin-right: 0;
  }
}

/* Blog index — cards may use width; teaser prose stays limited */
.blog-index .container {
  max-width: 1120px !important;
}
.blog-index .posts .container {
  display: grid !important;
  grid-template-columns: 1fr 1fr;
  gap: 0 36px;
  align-items: stretch;
}
.blog-index .post-card {
  padding: 28px 0 !important;
  min-width: 0;
}
.blog-index .post-card p {
  max-width: 36em;
}
@media (max-width: 820px) {
  .blog-index .posts .container {
    grid-template-columns: 1fr;
  }
}