/* ============================================================
   RDMxbCFS — Part 1 · shared knowledge-base stylesheet
   Serif reading design, light/dark via prefers-color-scheme
   AND manual [data-theme] override. Reused across all pages.
   ============================================================ */

:root {
  --bg: #faf8f5;
  --bg-elev: #ffffff;
  --text: #2a2622;
  --text-dim: #6b6357;
  --accent: #a3402f;
  --accent-soft: #f2e4de;
  --border: #e4ddd3;
  --code-bg: #f0ece3;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);

  --pass: #2f7d4f;
  --pass-soft: #e3f0e7;
  --partial: #9a6a0d;
  --partial-soft: #f5ecd8;
  --fail: #b0362a;
  --fail-soft: #f5e0dd;
  --novel: #7a3f9d;
  --novel-soft: #ece1f5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1815;
    --bg-elev: #232019;
    --text: #ece6dc;
    --text-dim: #a89e8e;
    --accent: #e08464;
    --accent-soft: #3a2620;
    --border: #3a352c;
    --code-bg: #2a261f;
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);

    --pass: #7fd9a4;
    --pass-soft: #1e3327;
    --partial: #e8c468;
    --partial-soft: #3a3120;
    --fail: #ef8a7d;
    --fail-soft: #3a2320;
    --novel: #c9a3e8;
    --novel-soft: #2f2438;
  }
}
:root[data-theme="light"] {
  --bg: #faf8f5; --bg-elev: #ffffff; --text: #2a2622; --text-dim: #6b6357;
  --accent: #a3402f; --accent-soft: #f2e4de; --border: #e4ddd3; --code-bg: #f0ece3;
  --pass: #2f7d4f; --pass-soft: #e3f0e7;
  --partial: #9a6a0d; --partial-soft: #f5ecd8;
  --fail: #b0362a; --fail-soft: #f5e0dd;
  --novel: #7a3f9d; --novel-soft: #ece1f5;
}
:root[data-theme="dark"] {
  --bg: #1a1815; --bg-elev: #232019; --text: #ece6dc; --text-dim: #a89e8e;
  --accent: #e08464; --accent-soft: #3a2620; --border: #3a352c; --code-bg: #2a261f;
  --pass: #7fd9a4; --pass-soft: #1e3327;
  --partial: #e8c468; --partial-soft: #3a3120;
  --fail: #ef8a7d; --fail-soft: #3a2320;
  --novel: #c9a3e8; --novel-soft: #2f2438;
}

* { box-sizing: border-box; }
html { overflow-x: hidden; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  line-height: 1.65;
  font-size: 17px;
}
.ui-font { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }

/* ---------- top nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.site-nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.site-nav .brand {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.site-nav .brand .brand-accent { color: var(--accent); }
.site-nav-links {
  list-style: none;
  display: flex;
  gap: 0.2rem;
  margin: 0 0 0 auto;
  padding: 0;
  flex-wrap: wrap;
}
.site-nav-links a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 600;
}
.site-nav-links a:hover { color: var(--accent); background: var(--accent-soft); }
.site-nav-links a.active { color: var(--accent); background: var(--accent-soft); }
.theme-toggle {
  border: 1px solid var(--border);
  background: var(--code-bg);
  color: var(--text);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  font-size: 0.9rem;
  cursor: pointer;
  line-height: 1;
}
.theme-toggle:hover { border-color: var(--accent); }

/* ---------- layout ---------- */
.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 6rem;
}
.page-wide { max-width: 1180px; }

header.masthead { margin-bottom: 2.5rem; }
header.masthead .kicker {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 700;
}
header.masthead h1 {
  font-size: 2.15rem;
  line-height: 1.2;
  margin: 0.4rem 0 0.6rem;
}
header.masthead .subtitle {
  color: var(--text-dim);
  font-size: 1.08rem;
  margin: 0;
  max-width: 62ch;
}
header.masthead .meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 1rem;
}

/* ---------- deep-dive audio card ---------- */
.deepdive-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem 1.6rem;
  margin: 2rem 0 2.8rem;
  box-shadow: var(--shadow);
}
.deepdive-card .dd-label {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.deepdive-card h2, .deepdive-card h3 {
  margin: 0.3rem 0 0.5rem;
  font-size: 1.3rem;
  border: none !important;
  padding: 0 !important;
}
.deepdive-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin: 0 0 1rem;
}
audio { border-radius: 8px; width: 100%; }
audio::-webkit-media-controls-panel { background: var(--code-bg); }

/* ---------- typography ---------- */
h2, h3, h4 { scroll-margin-top: 5rem; font-weight: 700; }
main h2, .page h2 {
  font-size: 1.6rem;
  margin: 3rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-soft);
}
main h3, .page h3 { font-size: 1.25rem; margin: 2.2rem 0 0.8rem; color: var(--accent); }
main h4, .page h4 { font-size: 1.05rem; margin: 1.6rem 0 0.6rem; }
.page p { margin: 0 0 1rem; }
.page ul, .page ol { margin: 0 0 1.2rem; padding-left: 1.4rem; }
.page li { margin: 0.35rem 0; }
.page strong { color: var(--text); }
.page code {
  background: var(--code-bg);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}
.lede {
  font-size: 1.08rem;
  color: var(--text-dim);
}

/* ---------- tables ---------- */
.table-wrap {
  overflow-x: auto;
  margin: 1.2rem 0 1.6rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  -webkit-overflow-scrolling: touch;
}
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
  font-size: 0.88rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: var(--code-bg);
  font-weight: 700;
  white-space: nowrap;
  position: sticky;
  top: 0;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--accent-soft); }

/* ---------- badges / verdicts ---------- */
.badge {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2em 0.55em;
  border-radius: 999px;
  white-space: nowrap;
}
.badge-pass { color: var(--pass); background: var(--pass-soft); }
.badge-partial { color: var(--partial); background: var(--partial-soft); }
.badge-fail { color: var(--fail); background: var(--fail-soft); }
.badge-novel { color: var(--novel); background: var(--novel-soft); }

/* ---------- gap / flag callouts ---------- */
.gap-note {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.2rem;
  border-radius: 0 10px 10px 0;
  font-size: 0.95rem;
  margin: 1.5rem 0;
}
.novel-note {
  background: var(--novel-soft);
  border-left: 4px solid var(--novel);
  padding: 1rem 1.2rem;
  border-radius: 0 10px 10px 0;
  font-size: 0.95rem;
  margin: 1.5rem 0;
}
.novel-note strong { color: var(--novel); }

/* ---------- stat tiles (index counters) ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 2rem 0 2.5rem;
}
.stat-tile {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem 1rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-tile .stat-num {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-tile .stat-label {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
  line-height: 1.3;
}

/* ---------- nav cards (index) ---------- */
.nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2.5rem;
}
.nav-card {
  display: block;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.3rem 1.4rem;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.nav-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.nav-card .nav-card-kicker {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}
.nav-card h3 {
  margin: 0.3rem 0 0.4rem;
  font-size: 1.15rem;
  color: var(--text);
}
.nav-card p {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.86rem;
  color: var(--text-dim);
  margin: 0;
}

/* ---------- version / role / arm cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.2rem 0 1.8rem;
}
.info-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
}
.info-card.flagship { border-color: var(--accent); }
.info-card h4 { margin-top: 0; }
.info-card .card-tag {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

/* ---------- checklist (comparison criteria) ---------- */
.checklist {
  list-style: none;
  margin: 1.2rem 0 1.8rem;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.checklist li {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.8rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  margin: 0;
  align-items: start;
}
.checklist .crit-id {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
  color: var(--accent);
  font-size: 0.95rem;
}
.checklist strong { display: block; margin-bottom: 0.2rem; }
.checklist span.crit-detail {
  font-size: 0.88rem;
  color: var(--text-dim);
}

/* ---------- tally bars ---------- */
.tally-block { margin: 1.2rem 0 2rem; }
.tally-row {
  display: grid;
  grid-template-columns: minmax(140px, 220px) 1fr 3.5rem;
  align-items: center;
  gap: 0.8rem;
  margin: 0.5rem 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
}
.tally-label { color: var(--text); }
.tally-track {
  background: var(--code-bg);
  border-radius: 6px;
  height: 0.85rem;
  overflow: hidden;
  border: 1px solid var(--border);
}
.tally-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 6px 0 0 6px;
  transition: width 1s ease;
}
.tally-fill.zero { background: var(--novel); width: 4px !important; }
.tally-count { text-align: right; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* ---------- figures ---------- */
.fig-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  margin: 1.5rem 0 2rem;
  box-shadow: var(--shadow);
}
.fig-card img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
  margin: 0 auto;
}
.fig-card figcaption {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.8rem;
}

/* ---------- timeline ---------- */
.timeline { position: relative; margin: 2rem 0; padding-left: 2rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 0.4rem;
  top: 0.3rem;
  bottom: 0.3rem;
  width: 2px;
  background: var(--border);
}
.timeline-era {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--accent);
  margin: 2.2rem 0 0.8rem;
  position: relative;
}
.timeline-era:first-child { margin-top: 0; }
.timeline-item {
  position: relative;
  margin: 0 0 1.3rem;
  padding-left: 0.6rem;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.05rem;
  top: 0.35rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--bg-elev);
  border: 2px solid var(--accent);
}
.timeline-item.novel-item::before { border-color: var(--novel); background: var(--novel); }
.timeline-date {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
  color: var(--accent);
  font-size: 0.95rem;
}
.timeline-item h4 { margin: 0.15rem 0 0.3rem; font-size: 1.05rem; }
.timeline-item p { margin: 0 0 0.3rem; font-size: 0.95rem; }
.timeline-item .tl-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.timeline-item a.doi-link {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
}
.timeline-item a.doi-link:hover { background: var(--accent-soft); }

/* ---------- milestone / roles ---------- */
.milestone-owner {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  color: var(--text-dim);
}

hr.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

footer.page-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  color: var(--text-dim);
}
footer.page-footer a { color: var(--text-dim); }

@media (max-width: 640px) {
  header.masthead h1 { font-size: 1.7rem; }
  .site-nav-links { gap: 0; }
  .site-nav-links a { padding: 0.35rem 0.5rem; font-size: 0.78rem; }
  .tally-row { grid-template-columns: 100px 1fr 2.5rem; font-size: 0.78rem; }
}

/* ---------- roadmap (overview map) ---------- */
.roadmap { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.7rem; margin: 1.5rem 0 2rem; }
.roadmap .act {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem 1rem; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 0.3rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.roadmap .act-num { font-weight: 800; color: var(--accent); font-size: 0.72rem; letter-spacing: 0.08em; }
.roadmap .act h4 { margin: 0; font-size: 1rem; color: var(--text); }
.roadmap .act ul { margin: 0.3rem 0 0; padding: 0; list-style: none; font-size: 0.82rem; color: var(--text-dim); display: flex; flex-direction: column; gap: 0.2rem; }
.roadmap .act li { margin: 0; }
.roadmap .act li::before { content: "\203A"; color: var(--accent); margin-right: 0.4em; font-weight: 700; }
@media (max-width: 820px) { .roadmap { grid-template-columns: 1fr 1fr; } }
/* ---------- inline-SVG figure inside a fig-card ---------- */
.fig-card svg { width: 100%; height: auto; display: block; margin: 0 auto; }
/* ---------- RaFD condition grid + gallery ---------- */
.cond-grid { display: grid; grid-template-columns: auto 1fr 1fr; gap: 6px; align-items: center; max-width: 420px; margin: 0.4rem 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.cond-grid .col-h { font-weight: 700; color: var(--accent); text-align: center; font-size: 0.82rem; }
.cond-grid .row-h { font-weight: 700; color: var(--accent); font-size: 0.82rem; writing-mode: vertical-rl; transform: rotate(180deg); justify-self: center; }
.cond-grid img { width: 100%; height: auto; display: block; border-radius: 8px; border: 1px solid var(--border); }
.face-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); gap: 10px; margin: 1rem 0; }
.face-gallery figure { margin: 0; }
.face-gallery img { width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border); display: block; }
.face-gallery figcaption { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 0.72rem; color: var(--text-dim); text-align: center; margin-top: 0.25rem; }
.faces-2col { display: grid; grid-template-columns: auto 1fr; gap: 1.4rem; align-items: center; }
@media (max-width: 720px) { .faces-2col { grid-template-columns: 1fr; } }