/* ============================================================
   PHYC · Editorial Stylesheet (shared by 17 sub-pages)
   Inherits the editorial-magazine system established in
   phyc/index.html. Brand color #ff6b8a is preserved.
   ============================================================ */

/* —— Token additions (do not replace existing per-file tokens) —— */
:root {
  --ink-deep: #0e0e14;
  --paper: #f6f1e8;
  --paper-soft: #faf6ee;
  --rose: #ff6b8a;
  --rose-deep: #c8425e;
  --rose-ink: #8a2843;
  --rose-soft: #ffe6ec;
  --shadow-soft: 0 1px 2px rgba(20, 20, 30, 0.03),
    0 12px 40px rgba(20, 20, 30, 0.05);
  --shadow-lift: 0 6px 20px rgba(255, 107, 138, 0.12),
    0 2px 6px rgba(20, 20, 30, 0.05);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "PingFang SC",
    serif;
  --display: "Fraunces", "Noto Serif SC", "Songti SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", "Menlo", monospace;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  /* path color fallback (per-page :root may override) */
  --path: var(--rose);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-primary, #fbfaf7);
  color: var(--ink-deep);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.7;
  text-align: justify;
  text-justify: inter-ideograph;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}
::selection { background: var(--rose); color: #fff; }

/* paper grain overlay */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.45;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220' viewBox='0 0 220 220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.92' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.07 0 0 0 0 0.07 0 0 0 0 0.10 0 0 0 0.32 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 220px 220px;
}
@media (prefers-reduced-motion: reduce) {
  .grain { opacity: 0.25; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.15s !important;
  }
}

/* ---------- Topbar (replaces .back-link, mirrors index.html topnav) ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 247, 0.78);
  backdrop-filter: saturate(140%) blur(18px);
  -webkit-backdrop-filter: saturate(140%) blur(18px);
  border-bottom: 1px solid rgba(20, 20, 30, 0.08);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset;
  padding: 10px clamp(16px, 3vw, 28px);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.2vw, 22px);
  font-size: 13px;
  white-space: nowrap;
  overflow-x: auto;
}
.topbar::-webkit-scrollbar { height: 0; }
.topbar .brand {
  font-family: var(--display);
  font-weight: 700;
  color: var(--ink-deep);
  font-size: 16px;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.brand-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--rose);
  border-radius: 1px;
  transform: translateY(-1px) rotate(45deg);
  box-shadow: 0 0 0 2px rgba(255, 107, 138, 0.18);
}
.topbar .brand-en {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted, #8a8a96);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.topbar .topbar-spacer { flex: 1; }
.topbar a.back-link,
.topbar a.persona-jump {
  position: relative;
  color: var(--text-secondary, #4a4a55);
  font-weight: 500;
  padding: 6px 2px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}
.topbar a.back-link::after,
.topbar a.persona-jump::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--rose);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-out-expo);
}
.topbar a.back-link:hover,
.topbar a.persona-jump:hover { color: var(--ink-deep); }
.topbar a.back-link:hover::after,
.topbar a.persona-jump:hover::after { transform: scaleX(1); }
.topbar a.back-link::before {
  content: "\2190";
  font-family: var(--display);
}

/* ---------- Container ---------- */
.container,
.page-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px) 0;
}

/* ---------- Page Header (handles .header-*, .group-*, .hero-* naming) ---------- */
.page-header,
.detail-header,
.hero {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(1.5rem, 3vw, 2.2rem);
  margin-bottom: clamp(1.5rem, 3vw, 2.2rem);
  border-bottom: 1px solid var(--border-subtle, #ececef);
}
.page-header::before,
.detail-header::before,
.hero::before {
  content: "";
  position: absolute;
  top: clamp(2.5rem, 6vw, 4.5rem);
  left: -1.5rem;
  width: 3px;
  height: 56px;
  background: var(--path);
  opacity: 0.85;
}

/* Header kicker (mono caps tag, e.g. "PERSONA · 13 / EMERGING") */
.header-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--path);
}
.header-kicker .k-rule {
  flex: 0 0 28px;
  height: 1px;
  background: var(--path);
  opacity: 0.55;
}
.header-kicker .k-tag {
  color: var(--text-muted, #8a8a96);
}

/* Big serif numeral */
.header-number,
.group-number,
.hero-number {
  font-family: var(--display);
  font-size: clamp(56px, 9vw, 110px);
  font-weight: 900;
  font-variation-settings: "opsz" 144;
  color: var(--ink-deep);
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin: 0 0 4px;
  position: relative;
  display: inline-block;
}
.header-number::after,
.group-number::after,
.hero-number::after {
  content: "";
  position: absolute;
  bottom: 8px;
  right: -12px;
  width: 8px;
  height: 8px;
  background: var(--path);
  border-radius: 50%;
}

/* Title */
.header-title,
.group-title,
.hero-title {
  font-family: var(--serif);
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink-deep);
  margin: 8px 0 8px;
}

/* Subtitle */
.header-subtitle,
.group-subtitle,
.hero-subtitle {
  font-family: var(--serif);
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary, #4a4a55);
  margin-bottom: 18px;
  max-width: 660px;
}

/* Badges */
.header-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle, #ececef);
  font-family: var(--mono);
}
.path-badge,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 0;
  border-radius: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--path);
  background: none;
  border: none;
}
.path-badge::before,
.badge::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  background: var(--path);
}
.badge .dot,
.path-badge .dot {
  width: 7px;
  height: 7px;
  background: var(--path);
  border-radius: 1px;
  transform: rotate(45deg);
  margin-left: -8px;
}

/* ---------- Metrics Bar (editorial, not boxed) ---------- */
.metrics-bar {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 48px);
  padding: 18px 0 22px;
  margin-bottom: clamp(1.5rem, 3vw, 2.2rem);
  background: none;
  border: none;
  border-top: 2px solid var(--ink-deep);
  border-bottom: 1px solid var(--border-subtle, #ececef);
  box-shadow: none;
  border-radius: 0;
}
.metric-item,
.metric {
  text-align: left;
  position: relative;
  padding-right: clamp(20px, 4vw, 48px);
}
.metric-item:not(:last-child)::after,
.metric:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 4px;
  right: 0;
  width: 1px;
  height: 38px;
  background: var(--border-subtle, #ececef);
}
.metric-value,
.metric .value {
  font-family: var(--display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--ink-deep);
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.02em;
  line-height: 1;
  display: block;
  margin-bottom: 4px;
}
.metric-label,
.metric .label {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted, #8a8a96);
}
/* persona-style metric (long descriptor block) */
.metric.persona,
.metric-block {
  background: var(--surface, #fff);
  border: 1px solid var(--border-subtle, #ececef);
  border-left: 2px solid var(--path);
  border-radius: 0 6px 6px 0;
  padding: 14px 18px;
  margin-bottom: 12px;
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-secondary, #4a4a55);
}
.metric.persona strong,
.metric-block strong { color: var(--ink-deep); font-weight: 700; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: clamp(16px, 2.4vw, 28px);
  margin-bottom: 0;
  border-bottom: 1px solid var(--border-subtle, #ececef);
  flex-wrap: wrap;
  padding-top: 4px;
}
.tab-btn {
  position: relative;
  padding: 10px 0;
  background: none;
  border: none;
  color: var(--text-muted, #8a8a96);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s ease;
}
.tab-btn::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--rose);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-out-expo);
}
.tab-btn:hover { color: var(--ink-deep); }
.tab-btn.active {
  color: var(--ink-deep);
  font-weight: 700;
}
.tab-btn:hover::after,
.tab-btn.active::after { transform: scaleX(1); }

.tab-content {
  display: none;
  padding: clamp(1.8rem, 4vw, 2.6rem) 0;
  animation: fadeIn 0.45s var(--ease-out-expo);
}
.tab-content.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Sections ---------- */
.section { margin-bottom: clamp(2rem, 3.5vw, 2.8rem); }

.section-title,
h3.section-title {
  font-family: var(--serif);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--ink-deep);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: none;
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--path);
  flex-shrink: 0;
}
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  background: var(--border-subtle, #ececef);
}

/* Inline kicker for section */
.section-kicker {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--path);
  display: block;
  margin-bottom: 6px;
}

p { margin: 10px 0; line-height: 1.85; color: var(--text-secondary, #4a4a55); }
p strong { color: var(--ink-deep); font-weight: 700; }

/* ---------- Tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 13.5px;
  margin: 14px 0;
}
table th {
  text-align: left;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-deep);
  background: var(--paper-soft);
  padding: 10px 10px 8px;
  border-bottom: 2px solid var(--ink-deep);
}
table td {
  padding: 10px;
  color: var(--text-secondary, #4a4a55);
  border-bottom: 1px solid var(--border-subtle, #ececef);
  vertical-align: top;
  line-height: 1.6;
  transition: background 0.15s ease;
}
table tr:hover td { background: rgba(255, 230, 236, 0.32); }
table td:first-child { color: var(--ink-deep); font-weight: 500; }
table td strong {
  color: var(--ink-deep);
  font-weight: 700;
  font-feature-settings: "tnum" 1;
}
.table-wrapper { overflow-x: auto; margin: 14px 0; }

/* ---------- Insight Box (editorial pull-quote) ---------- */
.insight-box {
  position: relative;
  background: linear-gradient(
    to right,
    var(--rose-soft) 0%,
    rgba(255, 230, 236, 0.5) 100%
  );
  border-left: 3px solid var(--rose);
  border-radius: 0 6px 6px 0;
  padding: 16px 22px 16px 30px;
  margin: 18px 0;
  font-family: var(--serif);
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.75;
  color: var(--rose-ink);
  letter-spacing: -0.005em;
}
.insight-box::before {
  content: "\201C";
  position: absolute;
  top: -4px;
  left: 12px;
  font-family: var(--display);
  font-size: 36px;
  line-height: 1;
  color: var(--rose);
  opacity: 0.45;
  pointer-events: none;
}
.insight-box strong {
  color: var(--ink-deep);
  font-weight: 700;
}

/* highlight-quote uses path color instead of rose */
.highlight-quote {
  position: relative;
  background: var(--paper-soft);
  border-left: 3px solid var(--path);
  border-radius: 0 6px 6px 0;
  padding: 14px 20px;
  margin: 16px 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-secondary, #4a4a55);
}
.highlight-quote strong { color: var(--ink-deep); font-weight: 700; }

/* ---------- Post lists ---------- */
.post-list,
.posts {
  list-style: none;
  margin: 14px 0;
  padding: 0;
  counter-reset: postnum;
}
.post-list li,
.posts li {
  position: relative;
  padding: 10px 0 10px 32px;
  border-bottom: 1px dashed var(--border-subtle, #ececef);
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-secondary, #4a4a55);
  background: none !important;
  border-radius: 0 !important;
  border-top: none;
  border-left: none;
  border-right: none;
  counter-increment: postnum;
  transition: padding-left 0.3s ease;
}
.post-list li::before,
.posts li::before {
  content: counter(postnum, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--path);
  letter-spacing: 0.06em;
}
.post-list li:hover,
.posts li:hover { padding-left: 38px; }
.post-list li:last-child,
.posts li:last-child { border-bottom: none; }
.post-list li a,
.posts li a {
  color: var(--ink-deep);
  text-decoration: none;
  background-image: linear-gradient(var(--rose), var(--rose));
  background-size: 100% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  padding-bottom: 1px;
  transition: background-size 0.3s ease, color 0.2s ease;
}
.post-list li a:hover,
.posts li a:hover {
  color: var(--rose-deep);
  background-size: 100% 2px;
  text-decoration: none;
}
.post-stat,
.pstat,
.ex-stat {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-muted, #8a8a96);
  letter-spacing: 0.04em;
  margin-left: 4px;
}

/* ---------- Accordion ---------- */
.accordion { margin: 16px 0; }
.accordion-item {
  border: 1px solid var(--border-subtle, #ececef);
  border-radius: 6px;
  margin-bottom: 8px;
  overflow: hidden;
  background: var(--surface, #fff);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.accordion-item:hover {
  box-shadow: var(--shadow-soft);
  border-color: rgba(255, 107, 138, 0.2);
}
.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  cursor: pointer;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink-deep);
  letter-spacing: -0.005em;
  transition: background 0.2s ease;
  user-select: none;
  background: var(--surface, #fff);
}
.accordion-header:hover { background: var(--paper-soft); }
.accordion-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--path);
  letter-spacing: 0.18em;
  margin-right: 6px;
}
.accordion-arrow {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--ink-deep);
  background: var(--surface, #fff);
  color: var(--ink-deep);
  font-family: var(--display);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.25s ease, color 0.25s ease,
    transform 0.45s var(--ease-out-expo), border-color 0.25s ease;
}
.accordion-arrow::before { content: "+"; }
.accordion-item.open .accordion-arrow {
  background: var(--ink-deep);
  color: var(--bg-primary, #fbfaf7);
  transform: rotate(180deg);
}
.accordion-item.open .accordion-arrow::before { content: "\2212"; }
.accordion-header:hover .accordion-arrow {
  background: var(--rose);
  border-color: var(--rose);
  color: #fff;
}
.accordion-body {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s var(--ease-out-expo), padding 0.3s ease;
}
.accordion-item.open .accordion-body {
  max-height: 8000px;
  padding: 4px 18px 18px;
}

/* ---------- Subgroup ---------- */
.subgroup {
  position: relative;
  padding: 12px 0 12px 18px;
  margin-top: 18px;
  border-left: 1px solid var(--border-subtle, #ececef);
}
.subgroup .sg-head {
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.subgroup .sg-head h4 {
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-deep);
  letter-spacing: -0.005em;
}
.subgroup .sg-head::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 14px;
  width: 18px;
  height: 1px;
  background: var(--path);
}

/* ---------- Journey Steps (numbered progression) ---------- */
.journey-steps {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  counter-reset: jstep;
  position: relative;
}
.journey-steps::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--path) 0%,
    var(--border-subtle, #ececef) 100%
  );
  opacity: 0.4;
}
.journey-step {
  position: relative;
  padding: 8px 0 12px 44px;
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary, #4a4a55);
  counter-increment: jstep;
}
.journey-step::before {
  content: counter(jstep);
  position: absolute;
  left: 0;
  top: 6px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface, #fff);
  border: 1px solid var(--path);
  color: var(--path);
  font-family: var(--display);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.journey-step strong { color: var(--ink-deep); font-weight: 700; }

/* ---------- User Voice Quote ---------- */
.user-voice {
  position: relative;
  padding: 22px 24px 22px 36px;
  margin: 16px 0;
  background: var(--paper-soft);
  border-left: 3px solid var(--rose);
  border-radius: 0 6px 6px 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text-secondary, #4a4a55);
  letter-spacing: -0.005em;
}
.user-voice::before {
  content: "\201C";
  position: absolute;
  top: 6px;
  left: 14px;
  font-family: var(--display);
  font-size: 42px;
  line-height: 1;
  color: var(--rose);
  opacity: 0.45;
}
.user-voice .uv-attr {
  display: block;
  margin-top: 10px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--rose-deep);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.user-voice strong { color: var(--ink-deep); font-weight: 700; }

/* ---------- Tag Cloud ---------- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}
.tag-pill {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 5px 10px;
  background: var(--paper);
  color: var(--text-secondary, #4a4a55);
  border: 1px solid transparent;
  border-radius: 3px;
  transition: all 0.2s ease;
}
.tag-pill:hover {
  border-color: var(--rose);
  color: var(--rose-deep);
}
.tag-pill.featured {
  background: var(--rose);
  color: #fff;
  font-weight: 700;
}
.tag-pill .tag-count {
  font-size: 10px;
  opacity: 0.7;
  margin-left: 4px;
}

/* ---------- Co-occurrence Bar ---------- */
.co-occur-item {
  display: grid;
  grid-template-columns: 100px 1fr 50px;
  gap: 12px;
  align-items: center;
  margin: 8px 0;
  font-family: var(--sans);
  font-size: 13px;
}
.co-occur-item .co-name {
  color: var(--ink-deep);
  font-weight: 500;
}
.co-occur-bar {
  position: relative;
  height: 6px;
  background: var(--border-subtle, #ececef);
  border-radius: 0;
  overflow: hidden;
}
.co-occur-bar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--w, 50%);
  background: linear-gradient(
    to right,
    var(--ink-deep) 0%,
    var(--rose) 100%
  );
}
.co-occur-item .co-val {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--rose-deep);
  text-align: right;
}

/* ---------- Comparison Table ---------- */
.comparison-table { /* inherits table styles, optional accent */
  margin: 14px 0;
}

/* ---------- Interaction Grid (2-col cards) ---------- */
.interaction-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin: 14px 0;
}
.interaction-grid > * {
  background: var(--surface, #fff);
  border: 1px solid var(--border-subtle, #ececef);
  border-left: 2px solid var(--path);
  border-radius: 0 6px 6px 0;
  padding: 14px 16px;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-secondary, #4a4a55);
}

/* ---------- Journey Fork ---------- */
.journey-fork {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 14px 0;
}
.fork-option {
  position: relative;
  background: var(--surface, #fff);
  border: 1px solid var(--border-subtle, #ececef);
  border-top: 3px solid var(--path);
  border-radius: 0 0 6px 6px;
  padding: 14px 16px;
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-secondary, #4a4a55);
}
.fork-option strong { color: var(--ink-deep); }

/* ---------- Misc ---------- */
.table-note {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-muted, #8a8a96);
  letter-spacing: 0.04em;
  margin-top: 6px;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out-expo),
    transform 0.6s var(--ease-out-expo);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Cross-navigation Footer ---------- */
.cross-nav {
  margin: clamp(2.5rem, 5vw, 4rem) 0 0;
  padding: clamp(1.6rem, 3vw, 2.2rem) 0 0;
  border-top: 2px solid var(--ink-deep);
  position: relative;
}
.cross-nav::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--ink-deep);
}
.cross-nav-label {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--path);
  margin-bottom: 14px;
  display: block;
}
.cross-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.cross-nav-card {
  display: block;
  background: var(--surface, #fff);
  border: 1px solid var(--border-subtle, #ececef);
  border-radius: 6px;
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s var(--ease-out-expo),
    box-shadow 0.3s var(--ease-out-expo), border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}
.cross-nav-card::before {
  content: "";
  position: absolute;
  top: 16px;
  bottom: 16px;
  left: 0;
  width: 2px;
  background: var(--path);
}
.cross-nav-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: rgba(255, 107, 138, 0.25);
}
.cross-nav-card .cn-num {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--path);
  letter-spacing: 0.18em;
  margin-bottom: 6px;
  display: block;
}
.cross-nav-card .cn-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-deep);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
  display: block;
}
.cross-nav-card .cn-sub {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--text-secondary, #4a4a55);
  line-height: 1.5;
}

/* ---------- Footer (editorial colophon) ---------- */
.site-footer {
  margin-top: clamp(3rem, 5vw, 4.5rem);
  padding: clamp(2rem, 4vw, 2.8rem) 0 clamp(1.5rem, 3vw, 2rem);
  background: var(--paper-soft);
  border-top: 2px solid var(--ink-deep);
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--ink-deep);
}
.site-footer-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}
.site-footer .brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-deep);
  letter-spacing: -0.012em;
}
.site-footer .footer-issue {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-muted, #8a8a96);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.site-footer .footer-meta {
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary, #4a4a55);
}
.site-footer .footer-meta strong {
  color: var(--ink-deep);
  font-weight: 700;
  font-feature-settings: "tnum" 1;
}
.site-footer .footer-utility {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  text-align: right;
}
.site-footer .back-top {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-deep);
  padding: 6px 0;
  border-bottom: 1px solid var(--ink-deep);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}
.site-footer .back-top:hover {
  color: var(--rose-deep);
  border-color: var(--rose-deep);
}
.site-footer .footer-stamp {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted, #8a8a96);
  letter-spacing: 0.16em;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .topbar { gap: 12px; }
  .topbar .brand-en { display: none; }
  .header-number,
  .group-number,
  .hero-number { font-size: 56px; }
  .header-title,
  .group-title,
  .hero-title { font-size: 22px; }
  .metrics-bar { gap: 18px; }
  .metric-item:not(:last-child)::after,
  .metric:not(:last-child)::after { display: none; }
  .site-footer-inner { grid-template-columns: 1fr; gap: 16px; }
  .site-footer .footer-utility { align-items: flex-start; text-align: left; }
  .cross-nav-grid { grid-template-columns: 1fr; }
  .interaction-grid { grid-template-columns: 1fr; }
  .journey-fork { grid-template-columns: 1fr; }
  .co-occur-item { grid-template-columns: 80px 1fr 40px; }
}
@media (max-width: 480px) {
  .tabs { gap: 14px; }
  .tab-btn { font-size: 10.5px; padding: 8px 0; }
  .accordion-header { font-size: 13.5px; gap: 10px; }
  .header-number,
  .group-number,
  .hero-number { font-size: 48px; }
}