/* ============================================================
   ObserveCo Consulting — White Paper pages
   (whitepapers.html index + whitepaper-01..06.html articles)
   Extends the draft site's consulting design system. Reuses the
   existing draft.css classes (hero, section, card-grid, table-wrap,
   btn, etc.) and adds only what the white-paper pages need.
   ============================================================ */

/* ── White paper graphic (inline SVG include) ──
   .wp-graphic holds the injected [data-wp-graphic] SVG. On the
   paper canvas surface, 1200px wide, scrollable on small screens. */
.wp-graphic {
  width: 100%;
  overflow-x: auto;
  margin: var(--space-3) 0 var(--space-4);
}
.wp-graphic svg {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.wp-graphic.wp-flat svg { border: none; }

/* ── White paper index cards ─────────────────────────────── */
.wp-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.wp-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.wp-card:hover { border-color: var(--green); }
.wp-card .wp-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}
.wp-card h3 { font-size: 21px; }
.wp-card p { color: var(--fg-2); font-size: 15px; flex: 1; }
.wp-card .wp-card-cta { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-1); }
.wp-card .wp-card-cta .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 3px 10px;
}
.wp-card-cta a { font-weight: 600; }

/* ── White paper article layout ──────────────────────────── */
.wp-article-hero { padding: var(--space-5) 0 var(--space-4); }
.wp-article-hero .container { max-width: 900px; }
.wp-article-hero .meta-row {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-3);
  margin-bottom: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.wp-article-hero .meta-row .sep { color: var(--fg-muted); }
.wp-article-hero h1 { max-width: 22ch; margin-bottom: var(--space-3); }
.wp-article-hero .sub { font-size: 19px; color: var(--fg-2); max-width: 62ch; }

/* Article body — readable, evidence-forward, editorial */
.wp-body { padding-bottom: var(--space-5); }
.wp-body .container { max-width: 760px; }
.wp-body article {
  font-size: 17px;
  line-height: 1.7;
  color: var(--fg);
}
.wp-body article > * { margin-bottom: var(--space-3); }
.wp-body h2 {
  font-size: clamp(24px, 3.2vw, 30px);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}
.wp-body h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.wp-body h3 { font-size: 21px; margin-top: var(--space-4); margin-bottom: var(--space-2); }
.wp-body p { color: var(--fg-2); max-width: 68ch; }
.wp-body strong { color: var(--fg); }
.wp-body ul, .wp-body ol { padding-left: 24px; color: var(--fg-2); display: grid; gap: var(--space-2); }
.wp-body li { color: var(--fg-2); }
.wp-body blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 4px solid var(--green);
  background: var(--green-dim);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
}
.wp-body blockquote p { color: var(--fg); }
.wp-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  margin: var(--space-4) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: block;
  overflow-x: auto;
}
.wp-body thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-3);
  background: var(--surface-2);
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.wp-body td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: top;
}
.wp-body tr:last-child td { border-bottom: none; }
.wp-body .wp-caption {
  font-size: 13px;
  color: var(--fg-3);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-2);
  margin-top: var(--space-3);
  max-width: 68ch;
}
.wp-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-5) 0;
}
.wp-body a { color: var(--green); }

/* Article footer nav: prev/next + back to index */
.wp-article-nav {
  border-top: 1px solid var(--border);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  align-items: center;
}
.wp-article-nav .link-arrow { font-size: 15px; }
.wp-article-nav .wp-prev { margin-right: auto; }
.wp-article-nav .wp-next { margin-left: auto; }

@media (max-width: 860px) {
  .wp-grid { grid-template-columns: 1fr; }
}