/* ------------------------------------------------------------------
   Causal Inference (conceptual guide series) — page components
   Loaded per-page via `css: "/assets/css/causal-inference.css"` front matter.
   Distinct visual identity from the Copilot Causal Toolkit (ct-*),
   but built on the same shared design tokens defined in site.css
   (--primary, --ink, --text, --radius-card, --shadow-card).
   ------------------------------------------------------------------ */

:root {
  --ci-border: #e6e6ef;
  --ci-muted: #5b5b6b;
  --ci-accent: #5c2d91;      /* purple — differentiates from the toolkit's blue */
  --ci-note: #335ccc;
  --ci-tip: #2e7d32;
  --ci-warning: #b3531d;
}

/* ---- Series breadcrumb chips ---- */
.ci-series-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 1.75rem;
  font-size: 0.82rem;
}
.page-content a.ci-chip,
.ci-chip {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--ci-border);
  background: #fff;
  color: var(--ci-muted) !important;
  text-decoration: none !important;
}
.page-content a.ci-chip:hover { border-color: var(--ci-accent); color: var(--ink, #1b1b24) !important; }
.ci-chip.is-current {
  background: var(--ci-accent);
  border-color: var(--ci-accent);
  color: #fff !important;
  font-weight: 600;
}
.ci-chip-step { opacity: 0.7; margin-right: 4px; }

/* ---- Callouts (assumptions / tips / pitfalls) ---- */
.ci-callout {
  border: 1px solid var(--ci-border);
  border-left: 4px solid var(--ci-note);
  background: #fff;
  border-radius: var(--radius-card, 12px);
  padding: 16px 20px;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-card, 0 1px 3px rgba(0, 0, 0, 0.06));
}
.ci-callout > :first-child { margin-top: 0; }
.ci-callout > :last-child { margin-bottom: 0; }
.ci-callout .ci-callout-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ci-note);
  margin-bottom: 0.4rem;
}
.ci-callout.is-tip { border-left-color: var(--ci-tip); }
.ci-callout.is-tip .ci-callout-label { color: var(--ci-tip); }
.ci-callout.is-warning { border-left-color: var(--ci-warning); }
.ci-callout.is-warning .ci-callout-label { color: var(--ci-warning); }
.ci-callout.is-accent { border-left-color: var(--ci-accent); }
.ci-callout.is-accent .ci-callout-label { color: var(--ci-accent); }

/* ---- Collapsible "show full implementation" blocks ---- */
details.ci-details {
  border: 1px solid var(--ci-border);
  border-radius: var(--radius-card, 12px);
  background: #fff;
  padding: 0 18px;
  margin: 1rem 0;
  box-shadow: var(--shadow-card, 0 1px 3px rgba(0, 0, 0, 0.06));
}
details.ci-details > summary {
  cursor: pointer;
  font-weight: 600;
  padding: 14px 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
details.ci-details > summary::-webkit-details-marker { display: none; }
details.ci-details > summary::before {
  content: "\25B8";
  color: var(--ci-accent);
  transition: transform 0.15s ease;
}
details.ci-details[open] > summary::before { transform: rotate(90deg); }
details.ci-details[open] > summary { border-bottom: 1px solid var(--ci-border); }
details.ci-details > summary + * { margin-top: 14px; }
details.ci-details > :last-child { margin-bottom: 16px; }

/* ---- Prev / next pager ---- */
.ci-pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 2.5rem 0 0;
  border-top: 1px solid var(--ci-border);
  padding-top: 1.25rem;
}
.page-content a.ci-pager-link {
  display: flex;
  flex-direction: column;
  max-width: 48%;
  padding: 12px 16px;
  border: 1px solid var(--ci-border);
  border-radius: var(--radius-card, 12px);
  text-decoration: none !important;
  color: var(--text, #1b1b24) !important;
  background: #fff;
  transition: border-color 0.14s ease, box-shadow 0.14s ease;
}
.page-content a.ci-pager-link:hover {
  border-color: var(--ci-accent);
  box-shadow: var(--shadow-card, 0 1px 3px rgba(0, 0, 0, 0.06));
}
.ci-pager-link.is-next { margin-left: auto; text-align: right; align-items: flex-end; }
.ci-pager-dir { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ci-muted); }
.ci-pager-title { font-weight: 600; }