/* =========================================================
   NASDAN — Blog detail (article) page
   Extends tokens.css / main.css / blog.css (post-card reused for
   related posts). Section-specific styles only.
   ========================================================= */

/* =========================================================
   ARTICLE HEADER
   ========================================================= */
.post-header {
  position: relative; padding-block: var(--sp-9) var(--sp-8);
  background: var(--white); border-bottom: 1px solid var(--ink-100);
  overflow: hidden;
}
/* Same top lining-strip treatment as the "Get a quote" hero
   (.start-hero-stripe in request-quote.css) -- a plain white hero with a
   thin brand-gradient strip along the top edge instead of a full-bleed
   navy background. */
.post-header-stripe {
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--nasdan-amber) 0%, var(--nasdan-amber) 25%, var(--nasdan-navy) 25%, var(--nasdan-navy) 60%, var(--nasdan-navy-600) 60%, var(--nasdan-navy-600) 80%, var(--nasdan-amber-700) 80%, var(--nasdan-amber-700) 100%);
}
.post-back { display: inline-flex; align-items: center; gap: var(--sp-2); font-size: 0.875rem; color: var(--ink-500); margin-bottom: var(--sp-6); transition: color var(--dur-base) var(--ease-out); }
.post-back svg { width: 14px; height: 14px; transition: transform var(--dur-base) var(--ease-out); }
.post-back:hover { color: var(--nasdan-navy); }
.post-back:hover svg { transform: translateX(-3px); }

/* Stacked rows (tag, title, then lead) each spanning 10 of 12 columns --
   same 12-column grid approach used for the case study detail page's
   hero (.csd-header-copy) instead of the homepage's side-by-side
   .split-head component. */
.post-header-inner { margin-bottom: var(--sp-7); }
.post-header-copy {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--sp-5);
}
.post-header-tag {
  display: inline-block; margin-bottom: var(--sp-4); font-size: var(--fs-caption);
  font-weight: var(--fw-semibold); letter-spacing: var(--ls-wider); text-transform: uppercase; color: var(--nasdan-amber);
}
.post-header-copy h1 { grid-column: 1 / 11; font-size: var(--fs-h1); font-weight: var(--fw-light); letter-spacing: var(--ls-tight); line-height: var(--lh-tight); color: var(--ink-900); margin: 0 0 var(--sp-5); }
p.post-header-lead { grid-column: 1 / 11; font-size: var(--fs-lead); color: var(--ink-500); margin: 0; }

@media (max-width: 767.98px) {
  .post-header-copy h1,
  p.post-header-lead {
    grid-column: 1 / 13;
  }
}

.post-header-meta { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-6); flex-wrap: wrap; }
.post-author-row { display: flex; align-items: center; gap: var(--sp-4); }
.post-author-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--nasdan-amber); color: var(--nasdan-navy); display: flex; align-items: center; justify-content: center; font-size: 0.9375rem; font-weight: var(--fw-semibold); flex: none; }
.post-author-name { font-size: 0.9375rem; font-weight: var(--fw-medium); color: var(--ink-900); }
.post-author-detail { font-size: 0.8125rem; color: var(--ink-500); }
.post-share { display: flex; gap: var(--sp-2); }
.post-share a {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--ink-200); display: flex; align-items: center;
  justify-content: center; color: var(--ink-500); transition: all var(--dur-base) var(--ease-out);
}
.post-share a:hover { border-color: var(--nasdan-amber-700); color: var(--nasdan-amber-700); background: var(--cloud); }
.post-share svg { width: 15px; height: 15px; }

/* =========================================================
   COVER VISUAL
   ========================================================= */
.post-cover { padding-block: var(--sp-7); }
/* aspect-ratio matches the 1200x630 cover_image dimensions (also used as
   the page's og:image / twitter:image) exactly, so object-fit has nothing
   left to crop -- the full image renders uncropped at every width instead
   of being cut off top/bottom by a fixed pixel height. max-width caps how
   wide (and therefore how tall, since the ratio is fixed) it renders at
   desktop -- ~950px lands it at ~500px tall, centered with margin either
   side, rather than stretching the full content width to ~655px tall.
   Below ~950px viewport width this is a no-op and the image just fills
   the available width as before. */
.post-cover-visual {
  position: relative; aspect-ratio: 1200 / 630; max-width: 950px; margin-inline: auto;
  border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(150deg, var(--nasdan-navy) 0%, var(--nasdan-navy-700) 100%);
}
/* This class is also applied directly to the <img> when post.cover_image is
   set (see post_detail.html); object-fit:cover is now a no-op crop-wise
   since the container ratio matches the source, but keeps the image from
   ever stretching/squashing if a differently-sized file is ever uploaded. */
img.post-cover-visual { object-fit: cover; display: block; }
.post-cover-visual::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 24px 24px;
}
.post-cover-visual::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 85% 15%, rgba(255,193,7,0.28), transparent 60%);
  pointer-events: none;
}

/* =========================================================
   LAYOUT — content + sidebar
   ========================================================= */
/* Top padding trimmed -- .post-cover already has its own sp-7 (48px)
   bottom padding right above this on the same white background, so the
   two stacked paddings were reading as ~112px of dead space with no
   visual break. Same pattern as the earlier hero/CTA gap fixes. */
.post-layout { padding-block: var(--sp-5) var(--section-pad-y); }
/* Body column widened / sidebar narrowed and the gutter between them
   tightened so the article claims more of the middle space instead of
   losing it to whitespace. */
.post-layout-grid { display: grid; grid-template-columns: minmax(0, 820px) 280px; gap: var(--sp-6); align-items: start; }

/* =========================================================
   PROSE
   ========================================================= */
.post-prose { max-width: 820px; font-size: 1.0625rem; line-height: var(--lh-relaxed); color: var(--ink-700); }
.post-prose p { margin: 0 0 var(--sp-6); }
.post-prose h2 { font-size: var(--fs-h3); font-weight: var(--fw-semibold); letter-spacing: var(--ls-snug); color: var(--ink-900); margin: var(--sp-8) 0 var(--sp-5); scroll-margin-top: var(--sp-8); }
.post-prose h3 { font-size: 1.1875rem; font-weight: var(--fw-semibold); color: var(--ink-900); margin: var(--sp-7) 0 var(--sp-4); }
.post-prose ul { margin: 0 0 var(--sp-6); padding-left: 1.2rem; display: grid; gap: var(--sp-3); }
.post-prose li { padding-left: var(--sp-2); }
.post-prose strong { color: var(--ink-900); font-weight: var(--fw-semibold); }

.post-pullquote {
  border-left: 3px solid var(--nasdan-amber); padding-left: var(--sp-6); margin: var(--sp-8) 0;
  font-size: var(--fs-lead); font-weight: var(--fw-light); color: var(--ink-900); line-height: var(--lh-snug);
}
.post-pullquote cite { display: block; margin-top: var(--sp-3); font-style: normal; font-size: 0.8125rem; font-weight: var(--fw-regular); color: var(--ink-400); }

/* =========================================================
   SIDEBAR
   ========================================================= */
.post-sidebar { position: sticky; top: calc(72px + var(--sp-6)); display: flex; flex-direction: column; gap: var(--sp-6); }
.post-toc { border: 1px solid var(--ink-100); border-radius: var(--radius-lg); padding: var(--sp-6); }
.post-toc-label { display: block; font-size: var(--fs-label); font-weight: var(--fw-semibold); letter-spacing: var(--ls-wider); text-transform: uppercase; color: var(--ink-400); margin-bottom: var(--sp-4); }
.post-toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sp-3); counter-reset: toc; }
.post-toc li { counter-increment: toc; }
.post-toc a { display: flex; gap: var(--sp-3); font-size: 0.875rem; color: var(--ink-500); line-height: var(--lh-snug); }
.post-toc a::before { content: counter(toc, decimal-leading-zero); flex: none; font-size: 0.75rem; color: var(--nasdan-amber-700); font-weight: var(--fw-semibold); font-variant-numeric: tabular-nums; }
.post-toc a:hover { color: var(--nasdan-navy); }

.post-cta-card { background: var(--nasdan-navy); border-radius: var(--radius-lg); padding: var(--sp-6); color: var(--white); position: relative; overflow: hidden; }
.post-cta-card::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(circle at 100% 0%, rgba(255,193,7,0.2), transparent 55%); }
.post-cta-card h3 { position: relative; z-index: 1; font-size: 1.0625rem; font-weight: var(--fw-semibold); color: var(--white); margin-bottom: var(--sp-3); }
.post-cta-card p { position: relative; z-index: 1; font-size: 0.875rem; color: var(--paper-300); margin-bottom: var(--sp-5); }
.post-cta-card .btn-nasdan { position: relative; z-index: 1; width: 100%; justify-content: center; }

/* =========================================================
   SUBSCRIBE — amber panel between the article and "More from
   the blog" (mirrors .cta-panel's layout, amber instead of navy)
   ========================================================= */
.post-subscribe { padding-block: var(--sp-8); }
.post-subscribe-panel {
  background: linear-gradient(135deg, var(--nasdan-amber) 0%, var(--nasdan-amber-600) 100%);
  border-radius: var(--radius-lg);
  padding: clamp(2.25rem, 1.8rem + 2.5vw, 4rem);
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--sp-8);
  align-items: center;
}
/* min-width: 0 overrides the grid default of min-width: auto, which
   otherwise lets the headline text force its column (and the whole panel)
   wider than the container on narrow viewports -- same "grid blowout" fix
   as request-quote.css / stem-robotics.css. */
.post-subscribe-panel > * { min-width: 0; }
.post-subscribe-panel::before {
  content: ""; position: absolute; width: 440px; height: 440px;
  background: radial-gradient(circle, rgba(11,22,63,0.16), transparent 70%);
  top: -160px; right: -100px; border-radius: 50%; filter: blur(10px);
}
.post-subscribe-copy { position: relative; z-index: 1; }
.post-subscribe-copy .eyebrow { color: var(--nasdan-navy); }
.post-subscribe-copy .eyebrow .eyebrow-mark { background: var(--nasdan-navy); }
.post-subscribe-copy h2 { color: var(--nasdan-navy); margin-bottom: var(--sp-4); }
.post-subscribe-copy p { color: var(--nasdan-navy-700); max-width: 42ch; }
.post-subscribe-form {
  position: relative; z-index: 1; background: rgba(11,22,63,0.08); border: 1px solid rgba(11,22,63,0.14);
  border-radius: var(--radius-md); padding: var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-3);
}
.post-subscribe-label { font-size: 0.8125rem; font-weight: var(--fw-medium); color: var(--nasdan-navy-700); }
.post-subscribe-form input {
  font-family: var(--font-sans); font-size: 0.9375rem; color: var(--ink-900); background: var(--white);
  border: 1px solid transparent; border-radius: var(--radius-sm); padding: 0.8rem 1rem;
}
.post-subscribe-form input:focus { outline: none; box-shadow: var(--shadow-focus); }
.post-subscribe-form .btn-nasdan { justify-content: center; margin-top: var(--sp-1); background: var(--nasdan-navy); color: var(--white); }
.post-subscribe-form .btn-nasdan:hover { background: var(--nasdan-navy-700); }
.post-subscribe-note { font-size: 0.75rem; color: var(--nasdan-navy-700); margin: 0; }

/* =========================================================
   RELATED POSTS — same resources-slider pattern as the homepage
   blog section (.resource-card etc. live in main.css, JS reuses
   the same [data-blog-slider] hooks from main.js)
   ========================================================= */
.post-related { padding-block: var(--section-pad-y); background: var(--surface-muted); border-top: 1px solid var(--ink-100); }
.post-related .resources-slider { margin-top: 0; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1199.98px) {
  .post-layout-grid { grid-template-columns: minmax(0, 760px) 250px; gap: var(--sp-5); }
  .post-prose { max-width: 760px; }
  .post-subscribe-panel { grid-template-columns: 1fr; }
}

@media (max-width: 991.98px) {
  .post-layout-grid { grid-template-columns: 1fr; }
  .post-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .post-toc { flex: 1 1 260px; }
  .post-cta-card { flex: 1 1 260px; }
}

@media (max-width: 767.98px) {
  .post-header { padding-block: var(--sp-6) var(--sp-5); }
  .post-header h1 { max-width: 100%; font-size: clamp(1.65rem, 1.4rem + 2.2vw, 2.1rem); }
  .post-header-meta { flex-direction: column; align-items: flex-start; }
  .post-cover-visual { border-radius: var(--radius-md); }
  .post-sidebar { flex-direction: column; }
  .post-prose { font-size: 1rem; }
}