/* =========================================================================
   PLUMB - guides (content hub + article pages)
   Document-led, job-to-be-done diligence guides. Same survey vocabulary as
   the legal pages: mono metadata, a single signal rule, quiet reading surface.
   Built on tokens.css + site.css; reuses .prose / .toc / .note from legal.css
   (link legal.css before this sheet on guide pages).
   ========================================================================= */

/* ---------- shared: breadcrumb ---------------------------------------- */
.crumbs { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
  color: var(--fg-faint); margin: 0 0 22px; display: flex; flex-wrap: wrap; gap: 8px; }
.crumbs a { color: var(--fg-subtle); text-decoration: none; }
.crumbs a:hover { color: var(--fg-bright); }
.crumbs .sep { color: var(--steel-500); }

/* ---------- HUB (index) ----------------------------------------------- */
.guides { padding: 64px 0 96px; }
.guides .wrap { max-width: 1040px; }

.guides-head { border-bottom: 1px solid var(--border-subtle); padding-bottom: 32px; margin-bottom: 8px; }
.guides-head h1 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(32px, 5vw, 48px); line-height: 1.05; letter-spacing: -0.025em;
  color: var(--fg-bright); margin: 14px 0 0;
}
.guides-head .standfirst { font-size: var(--text-lg); line-height: 1.6; color: var(--fg-muted);
  margin: 18px 0 0; max-width: 64ch; }

.guides-group { margin-top: 44px; }
.guides-group > .group-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--fg-subtle); margin: 0 0 16px;
  display: flex; align-items: center; gap: 12px; }
.guides-group > .group-label::after { content: ""; flex: 1; height: 1px; background: var(--border-subtle); }

.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.guide-card { display: flex; flex-direction: column; gap: 10px;
  padding: 22px 22px 20px; background: var(--bg-surface);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  text-decoration: none; transition: border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.guide-card:hover { border-color: var(--border-strong); background: var(--bg-surface-2);
  transform: translateY(-2px); }
.guide-card .tag { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--signal-400); }
.guide-card h3 { font-family: var(--font-display); font-weight: 500; font-size: var(--text-xl);
  line-height: 1.2; letter-spacing: -0.01em; color: var(--fg-bright); margin: 0; }
.guide-card p { font-size: var(--text-sm); line-height: 1.55; color: var(--fg-muted); margin: 0; }
.guide-card .read { margin-top: auto; padding-top: 6px; font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.04em; color: var(--fg-subtle); }
.guide-card:hover .read { color: var(--signal-400); }

.guides-note { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border-subtle);
  font-size: var(--text-sm); color: var(--fg-faint); }

/* ---------- ARTICLE (a single guide) ---------------------------------- */
.guide { padding: 56px 0 96px; }
.guide .wrap { max-width: 760px; }

.guide-head { border-bottom: 1px solid var(--border-subtle); padding-bottom: 26px; }
.guide-head .kicker { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--signal-400); }
.guide-head h1 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(28px, 4.4vw, 42px); line-height: 1.08; letter-spacing: -0.022em;
  color: var(--fg-bright); margin: 12px 0 0;
}
.guide-head .standfirst { font-size: var(--text-lg); line-height: 1.6; color: var(--fg-muted);
  margin: 16px 0 0; }

.byline { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-top: 22px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.03em; color: var(--fg-faint); }
.byline .who { color: var(--fg-muted); display: inline-flex; align-items: center; gap: 8px; }
.byline .who::before { content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--signal-500); flex: none; }
.byline .k { color: var(--fg-subtle); }

/* key takeaways - a titled callout (the "show your working" ethos) */
.takeaways { margin: 32px 0 8px; padding: 20px 22px; background: var(--ink-850);
  border: 1px solid var(--border-subtle); border-left: 3px solid var(--signal-500);
  border-radius: 0 var(--radius-md) var(--radius-md) 0; }
.takeaways .t-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--fg-subtle); margin-bottom: 12px; }
.takeaways ul { margin: 0; padding-left: 20px; }
.takeaways li { font-size: var(--text-md); line-height: 1.55; color: var(--fg); margin: 0 0 8px; }
.takeaways li:last-child { margin-bottom: 0; }
.takeaways li::marker { color: var(--signal-400); }

/* "How Plumb helps" - a single signal CTA block inside the article */
.plumb-cta { margin: 40px 0 8px; padding: 26px 26px 24px; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--radius-lg); }
.plumb-cta .c-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--signal-400); margin-bottom: 10px; }
.plumb-cta h2 { font-family: var(--font-display); font-weight: 500; font-size: var(--text-2xl);
  line-height: 1.2; letter-spacing: -0.01em; color: var(--fg-bright); margin: 0 0 10px;
  display: block; border: none; padding: 0; }
.plumb-cta p { font-size: var(--text-md); line-height: 1.6; color: var(--fg-muted); margin: 0 0 18px; }
.plumb-cta .cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* related guides */
.related { margin-top: 56px; padding-top: 28px; border-top: 1px solid var(--border-subtle); }
.related .r-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--fg-subtle); margin-bottom: 16px; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.related-card { padding: 16px 18px; background: var(--bg-surface);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  text-decoration: none; transition: border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out); }
.related-card:hover { border-color: var(--border-strong); background: var(--bg-surface-2); }
.related-card .tag { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--signal-400); display: block; margin-bottom: 6px; }
.related-card span.t { font-family: var(--font-display); font-size: var(--text-md);
  line-height: 1.3; color: var(--fg-bright); }

@media (max-width: 680px) {
  .guide-grid, .related-grid { grid-template-columns: 1fr; }
}