/* ===== Family Tree — minimalist styles matching the sample ===== */

:root {
  --bg: #ffffff;
  --text: #3a3a3a;
  --text-muted: #8a8a8a;
  --line: #d0d0d0;
  --border-male: #7eb6d9;
  --border-female: #e8a0b5;
  --border-spouse: #b0b0b0;
  --btn-bg: #ffffff;
  --btn-border: #c8c8c8;
  --btn-hover: #f0f7fb;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  --font: "Segoe UI", "PingFang TC", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans TC", "Noto Sans SC", "Microsoft JhengHei", "Microsoft YaHei",
    system-ui, sans-serif;
  --avatar-size: 80px;
  --person-width: 7.5rem;
  --person-gap: 1.25rem;
  --sibling-gap: 56px; /* fixed horizontal gap between sibling units */
  --line-w: 2px;
  --ring-w: 3px; /* colored outline stroke */
  --ring-gap: 3px; /* white gap between stroke and photo */
  --transition: 0.38s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ----- Header ----- */
.site-header {
  text-align: center;
  padding: 2.25rem 1.5rem 0.75rem;
  max-width: 42rem;
  margin: 0 auto;
}

.site-header h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #2c2c2c;
}

.site-header .intro {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-muted);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem 1.5rem;
  margin: 1.25rem auto 0;
  padding: 0;
  list-style: none;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2.5px solid;
  flex-shrink: 0;
}

.legend-dot.male {
  border-color: var(--border-male);
  background: linear-gradient(135deg, #c5e4f5, #7eb6d9);
}

.legend-dot.female {
  border-color: var(--border-female);
  background: linear-gradient(135deg, #f5d0dc, #e8a0b5);
}

.legend-dot.spouse {
  border-color: var(--border-spouse);
  border-style: dashed;
  background: #ececec;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 1.15rem 0 0;
}

.toolbar button {
  font-family: inherit;
  font-size: 0.8rem;
  color: #555;
  background: #fff;
  border: 1px solid var(--btn-border);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.toolbar button:hover {
  background: var(--btn-hover);
  border-color: var(--border-male);
  color: #3a7a9a;
}

.toolbar button:focus-visible {
  outline: 2px solid var(--border-male);
  outline-offset: 2px;
}

/* ----- Tree canvas ----- */
.tree-wrap {
  /* No internal scrolling: a wide tree widens the page and the browser
     window scrolls it. */
  overflow: visible;
  width: max-content;
  min-width: 100%;
  padding: 1rem 1.5rem 3.5rem;
  touch-action: pan-x pan-y pinch-zoom;
}

.tree {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: min-content;
  margin: 0 auto;
  padding: 0.5rem 1rem;
  transform-origin: top center;
  transition: transform 0.2s ease;
}

.tree-error {
  text-align: center;
  color: #a44;
  padding: 2rem;
}

/* ----- Person card ----- */
.person {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: var(--person-width);
  text-align: center;
  position: relative;
  z-index: 1;
}

/* Outline stroke + white gap (padding) around the photo/initials circle */
.avatar {
  width: var(--avatar-size);
  height: var(--avatar-size);
  border-radius: 50%;
  border: var(--ring-w) solid;
  padding: var(--ring-gap);
  background: #fff;
  box-shadow: var(--shadow);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.avatar-photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  background: linear-gradient(145deg, #a8c8dc, #6a9db8);
}

.avatar-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.person.bloodline.male .avatar {
  border-color: var(--border-male);
}

.person.bloodline.male .avatar-photo {
  background: linear-gradient(145deg, #b8d9ee, #7eb6d9);
}

.person.bloodline.female .avatar {
  border-color: var(--border-female);
}

.person.bloodline.female .avatar-photo {
  background: linear-gradient(145deg, #f0c4d2, #e8a0b5);
}

.person.spouse .avatar {
  border-color: transparent; /* dashed SVG ring is drawn over this border */
}

.person.spouse .avatar-photo {
  background: linear-gradient(145deg, #d8d8d8, #b0b0b0);
}

.avatar-ring {
  position: absolute;
  inset: calc(-1 * var(--ring-w));
  width: calc(100% + 2 * var(--ring-w));
  height: calc(100% + 2 * var(--ring-w));
  pointer-events: none;
  overflow: visible;
  color: var(--border-spouse);
}

/* Label: exactly 3 lines — name, English name (optional), birthday */
.person-label {
  margin-top: 0.4rem;
  padding: 0 0.3rem;
  background: var(--bg); /* bloodline line passes behind the label */
  position: relative;
  z-index: 1;
  max-width: 100%;
}

.person-label p {
  margin: 0;
  line-height: 1.3;
  word-break: break-word;
}

.person-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: #3d3d3d;
}

.person-english {
  font-size: 0.72rem;
  font-weight: 500;
  color: #5c5c5c;
}

.person-dates {
  margin-top: 0.08rem !important;
  font-size: 0.66rem;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

/* ----- Connector lines (SVG, drawn by tree.js) ----- */
.line-layer {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 0;
}

.line-layer path {
  fill: none;
  stroke: var(--line);
  stroke-width: var(--line-w);
  stroke-linecap: square;
}

/* ----- Couple (spouse pair) ----- */
.couple {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  position: relative;
}

.couple-gap {
  width: 0.4rem;
  flex-shrink: 0;
}

/* ----- Branch ----- */
.branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.toggle-row {
  position: relative;
  align-self: stretch;
  height: 2.4rem;
}

.branch-toggle {
  position: absolute;
  top: 0.55rem;
  left: 50%;
  translate: -50% 0;
  z-index: 2;
  margin: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--btn-border);
  background: var(--btn-bg);
  color: #555;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  transition: background var(--transition), border-color var(--transition),
    transform 0.15s ease, box-shadow var(--transition);
}

.branch-toggle:hover {
  background: var(--btn-hover);
  border-color: var(--border-male);
  color: #3a7a9a;
}

.branch-toggle:focus-visible {
  outline: 2px solid var(--border-male);
  outline-offset: 2px;
}

.branch-toggle:active {
  transform: scale(0.94);
}

.toggle-icon {
  display: block;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1;
  pointer-events: none;
  translate: 0 -0.5px;
}

.branch-toggle[aria-expanded="false"] .toggle-icon::before {
  content: "+";
}

.branch-toggle[aria-expanded="true"] .toggle-icon::before {
  content: "−";
}

/* Children row; the sibling rail sits at the top edge of .children-inner */
.children-inner {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  justify-content: center;
  gap: var(--sibling-gap);
  position: relative;
  margin-top: 0.7rem;
}

.child-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  padding-top: 1.2rem; /* drop from rail to the child's avatar */
}

/* Expand / collapse animation via grid-template-rows */
.subtree {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--transition), opacity var(--transition);
  opacity: 1;
  width: 100%;
}

.subtree > .subtree-inner {
  overflow: hidden;
  min-height: 0;
}

.subtree.is-collapsed {
  grid-template-rows: 0fr;
  opacity: 0;
  pointer-events: none;
}

.subtree-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 0.5rem 1.5rem 2rem;
  font-size: 0.75rem;
  color: #b0b0b0;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: #2c2c2c;
  color: #fff;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  z-index: 10;
  text-decoration: none;
  font-size: 0.85rem;
}

.skip-link:focus {
  top: 0.75rem;
}

@media (max-width: 640px) {
  :root {
    --avatar-size: 64px;
    --person-width: 6.75rem;
    --person-gap: 1.1rem;
    --sibling-gap: 40px;
  }

  .person-name {
    font-size: 0.72rem;
  }

  .person-english {
    font-size: 0.66rem;
  }

  .person-dates {
    font-size: 0.6rem;
  }


  .site-header {
    padding-top: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .subtree,
  .branch-toggle,
  .tree,
  .toolbar button {
    transition: none;
  }
}

/* Tidy layout: positions set by tree.js balance() */
.branch { align-items: flex-start; }
.subtree-inner { align-items: flex-start; }
.children-inner { justify-content: flex-start; width: max-content; }
.couple { justify-content: flex-start; }
.child-slot { flex-shrink: 0; align-items: flex-start; }
.subtree { width: 100%; }

/* Names stay on one line; a long name widens its card so layout spacing accounts for it. */
.person { min-width: var(--person-width); width: max-content; }
.person-label { max-width: none; white-space: nowrap; }
.person-label p { word-break: normal; white-space: nowrap; }

/* Click-and-drag panning (tree.js enableDragPan) */
@media (pointer: fine) {
  .tree-wrap.pannable { cursor: grab; }
  .tree-wrap.pannable button { cursor: pointer; }
}
html.is-panning,
html.is-panning * {
  cursor: grabbing !important;
  user-select: none !important;
  -webkit-user-select: none !important;
}

/* ===== Fixed title bar ===== */
:root { --bar-h: 56px; }
body { padding-top: var(--bar-h); }
.site-header {
  position: fixed; top: 0; left: 0; right: 0; width: 100vw; max-width: none;
  margin: 0; z-index: 20; background: #fff;
  border-bottom: 1px solid #ececec; box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.6rem 1.5rem; text-align: left;
}
.site-header h1 { margin: 0; font-size: 1.5rem; white-space: nowrap; }
.bar-right { display: flex; align-items: center; gap: 1.25rem; flex-wrap: nowrap; min-width: 0; }
.site-header .intro { font-size: 0.85rem; white-space: nowrap; }
.site-header .legend { margin: 0; flex-wrap: nowrap; gap: 0.9rem; }
.site-header .toolbar { margin: 0; flex-wrap: nowrap; gap: 0.4rem; }
.toolbar button { white-space: nowrap; }
.skip-link { z-index: 30; }
@media (max-width: 1000px) { .site-header .intro { display: none; } }
@media (max-width: 700px) {
  .site-header { padding: 0.5rem 0.75rem; gap: 0.5rem; flex-wrap: wrap; }
  .site-header h1 { font-size: 1.2rem; }
  .bar-right { flex-wrap: wrap; justify-content: flex-end; gap: 0.4rem 0.75rem; }
  .site-header .legend { gap: 0.6rem; }
  .toolbar button { padding: 0.22rem 0.55rem; font-size: 0.74rem; }
}

/* ===== Calligraphy title (Yuji Syuku, subset: 陳氏家譜 only, SIL OFL) ===== */
@font-face {
  font-family: "TitleBrush";
  src: url("fonts/yuji-syuku-title.woff2?v=4g") format("woff2");
  font-display: block;
}
.site-header h1 {
  font-family: "TitleBrush", var(--font);
  font-weight: 400;
  font-size: 1.85rem;
  line-height: 1.15;
  letter-spacing: 0.08em;
  color: #1c1a17;
}
@media (max-width: 700px) { .site-header h1 { font-size: 1.45rem; } }

/* ===== Seal stamp (印章) before the title ===== */
.site-header h1 { display: inline-flex; align-items: center; gap: 0.6rem; }
.site-header h1 .seal { width: 42px; height: 42px; flex-shrink: 0; display: block; }
@media (max-width: 700px) { .site-header h1 .seal { width: 32px; height: 32px; } .site-header h1 { gap: 0.45rem; } }

/* ===== Single-row bar on phones ===== */
.lbl-short { display: none; }
.site-header { width: 100%; }
@media (max-width: 700px) {
  .site-header { flex-wrap: nowrap; padding: 0.4rem 0.6rem; gap: 0.4rem; }
  .site-header h1 { font-size: 1.2rem; gap: 0.35rem; letter-spacing: 0.04em; }
  .site-header h1 .seal { width: 30px; height: 30px; }
  .bar-right { flex-wrap: nowrap; gap: 0.3rem; }
  .site-header .intro, .site-header .legend { display: none; }
  .site-header .toolbar { gap: 0.25rem; }
  .toolbar button { padding: 0.2rem 0.45rem; font-size: 0.72rem; }
  .lbl-long { display: none; }
  .lbl-short { display: inline; }
}
@media (max-width: 360px) {
  .site-header h1 { font-size: 1.05rem; }
  .toolbar button { padding: 0.18rem 0.35rem; }
}

/* ======================================================================
   v2 themes — body.theme-a / .theme-b / .theme-c (?theme=a|b|c)
   Shared: aged paper sampled from Bill's 五服圖 reference (#e2dcd5) + faint grain.
   Fonts: Noto Serif TC Black (A, B) and LXGW WenKai TC Bold (C), both SIL OFL 1.1,
   subset to the characters the site uses.
   ====================================================================== */
@font-face { font-family: "Woodblock"; src: url("fonts/noto-serif-tc-900-subset.woff2?v=94") format("woff2"); font-weight: 900; font-display: block; }
@font-face { font-family: "BrushKai"; src: url("fonts/lxgw-wenkai-tc-700-subset.woff2?v=94") format("woff2"); font-weight: 700; font-display: block; }

body[class*="theme-"] {
  --bg: #e2dcd5; /* alt: #fdfdfc (Song banknote paper, C7) */ --ink: #1a1a1a; --ink-soft: #5a534c; --cinnabar: #a3281e;
  --line: #2a2622; --line-w: 1.25px; --text: var(--ink); --text-muted: var(--ink-soft);
  --btn-border: #2a2622; --btn-hover: #d6cec3; --shadow: none;
}
html:has(body[class*="theme-"]), body[class*="theme-"] {
  background-color: #e2dcd5; /* alt: #fdfdfc (Song banknote paper, no grain) */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .35 0 0 0 0 .28 0 0 0 0 .2 0 0 0 .07 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
body[class*="theme-"] .site-header { background: var(--bg); box-shadow: none; border-bottom: 1px solid var(--ink); }
body[class*="theme-"] .site-header .intro, body[class*="theme-"] .legend { color: var(--ink-soft); }
body[class*="theme-"] .toolbar button { color: var(--ink); background: transparent; border-color: var(--btn-border); box-shadow: none; }
body[class*="theme-"] .toolbar button:hover { background: var(--btn-hover); color: var(--ink); border-color: var(--ink); }
body[class*="theme-"] .site-header h1 .seal rect { fill: transparent; }
body[class*="theme-"] .line-layer path { stroke: var(--line); stroke-width: var(--line-w); }
body[class*="theme-"] .person-label { background: transparent; }
body[class*="theme-"] .person-name { color: var(--ink); }
body[class*="theme-"] .person-english, body[class*="theme-"] .person-dates { color: var(--ink-soft); }
body[class*="theme-"] .branch-toggle { background: var(--bg); border-color: var(--ink-soft); color: var(--ink); box-shadow: none; }
body[class*="theme-"] .branch-toggle:hover { background: var(--btn-hover); border-color: var(--ink); color: var(--ink); }
body[class*="theme-"] .avatar { box-shadow: none; background: transparent; }
body[class*="theme-"] .avatar-photo img { mix-blend-mode: multiply; }
body[class*="theme-"] .legend-dot { background: none !important; }
body[class*="theme-"] .legend-dot.male { border-color: var(--ink); }
body[class*="theme-"] .legend-dot.female { border-color: var(--cinnabar); }
body[class*="theme-"] .legend-dot.spouse { border-color: var(--ink-soft); }
.gen-labels { display: none; }

/* ---------- A: ink on paper, minimal ---------- */
.theme-a .avatar { border: 0 !important; padding: 0; }
.theme-a .avatar-ring { display: none; }
.theme-a .avatar-photo { background: #cfc6ba !important; }
.theme-a .avatar-photo img { filter: grayscale(1) sepia(.6) contrast(1.05); }
.theme-a .person-name { font-family: "Woodblock", var(--font); font-weight: 900; font-size: .92rem; letter-spacing: .06em; }
.theme-a .person.bloodline.female .person-name { color: #6e2a22; }
.theme-a .person.spouse .person-name { color: var(--ink-soft); }
.theme-a .toolbar button { font-family: "Woodblock", var(--font); font-weight: 900; }

/* ---------- B: book page, vertical names ---------- */
.theme-b { --avatar-size: 18px; --line-w: 1px; }
.theme-b .avatar { border: 1px solid var(--ink) !important; padding: 0; border-radius: 50%; }
.theme-b .avatar-ring { display: none; }
.theme-b .avatar-photo { background: #cfc6ba !important; }
.theme-b .avatar-photo img { filter: grayscale(1) sepia(.6); }
.theme-b .person { min-width: 3.2rem; }
.theme-b .person-label { writing-mode: vertical-rl; text-orientation: mixed; margin: .35rem auto 0; padding: 0; display: flex; gap: .1rem; }
.theme-b .person-name { font-family: "Woodblock", var(--font); font-weight: 900; font-size: 1.45rem; letter-spacing: .12em; line-height: 1.05; }
.theme-b .person-english { font-size: .6rem; }
.theme-b .person-dates { font-size: .58rem; margin: 0 !important; }
.theme-b .person.bloodline.female .person-name { color: #6e2a22; }
.theme-b .person.spouse .person-name { color: var(--ink-soft); font-size: 1.2rem; }
.theme-b .person.spouse .person-name::before { content: "配"; font-size: .7rem; margin-bottom: .25rem; display: block; color: var(--ink-soft); }
.theme-b .toolbar button { font-family: "Woodblock", var(--font); font-weight: 900; border-radius: 2px; }
.theme-b .branch-toggle { border-radius: 2px; width: 18px; height: 18px; }
.theme-b .tree > .branch { margin-left: 4.5rem; }
.theme-b .gen-labels { display: block; position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.theme-b .gen-rule { position: absolute; left: 0; right: 0; border-top: 1px solid rgba(26,26,26,.55); }
.theme-b .gen-label { position: absolute; left: .4rem; writing-mode: vertical-rl; font-family: "Woodblock", var(--font); font-weight: 900; font-size: .85rem; letter-spacing: .15em; color: var(--ink); background: var(--bg); padding: .3rem .15rem; border-left: 1px solid var(--ink); border-right: 1px solid var(--ink); }
.theme-b .tree { position: relative; }

/* ---------- C: brush and seal ---------- */
.theme-c .avatar { border: 0 !important; padding: 0; }
.theme-c .avatar-ring { display: none; }
.theme-c .avatar-photo { background: #d4ccc1 !important; }
.theme-c .avatar-photo img { filter: grayscale(1) contrast(1.25) brightness(1.02); opacity: .85; }
.theme-c .person-name { font-family: "BrushKai", var(--font); font-weight: 700; font-size: 1.02rem; letter-spacing: .05em; }
.theme-c .person.bloodline.female .person-name { color: var(--cinnabar); }
.theme-c .person.bloodline.female .avatar-photo { box-shadow: 0 0 0 2px rgba(163,40,30,.55); }
.theme-c .person.spouse .person-name::before {
  content: "配"; display: inline-block; font-size: .58rem; line-height: 1; color: #fff; background: var(--cinnabar);
  padding: 2px 2px 1px; margin-right: 4px; border-radius: 2px; vertical-align: .22em; letter-spacing: 0;
}
.theme-c .toolbar button { font-family: "BrushKai", var(--font); font-weight: 700; }

/* ---------- C2: engraved banknote avatars ----------
   Inks sampled with PIL: portrait ink #4a4b6b (Central Bank of China 1930 note),
   guilloche tan #d39c7d; daughters use the seal vermilion #c8102e. */
.theme-c { --engrave-blue: #4a4b6b; --guilloche-tan: #d39c7d; --seal-red: #c8102e; --cinnabar: #c8102e; }
.theme-c .avatar { border: 0 !important; padding: 2px; border-radius: 50%; background: transparent; }
.theme-c .person.bloodline.male .avatar { box-shadow: 0 0 0 1.5px var(--engrave-blue); }
.theme-c .person.bloodline.female .avatar { box-shadow: 0 0 0 1.5px var(--seal-red); }
.theme-c .person.bloodline.female .avatar-photo { box-shadow: none; }
.theme-c .avatar-photo { background: var(--engrave-blue) !important; }
body.theme-c .avatar-photo img { filter: none; opacity: 1; mix-blend-mode: normal; }
.theme-c .person.spouse .avatar-ring { display: block; color: var(--guilloche-tan); }
.theme-c .legend-dot.male { border-color: var(--engrave-blue); background: var(--engrave-blue) !important; }
.theme-c .legend-dot.female { border-color: var(--seal-red); background: var(--seal-red) !important; }
.theme-c .legend-dot.spouse { border-color: var(--guilloche-tan); border-style: dashed; }

/* ---------- C3: colour figures; all name text one ink colour ---------- */
body.theme-c .person .person-name,
body.theme-c .person.bloodline.female .person-name,
body.theme-c .person.spouse .person-name { color: var(--ink); }
body.theme-c .person .person-english,
body.theme-c .person .person-dates { color: var(--ink); }
body.theme-c .person.spouse .person-name::before { background: transparent; color: var(--ink); border: 1px solid var(--ink); padding: 1px 2px 0; }

/* ---------- C4: muted brick vermilion for daughters' avatars (header seal keeps #c8102e) ---------- */
.theme-c { --avatar-red: #8f4a42; }
.theme-c .person.bloodline.female .avatar { box-shadow: 0 0 0 1.5px var(--avatar-red); }
.theme-c .legend-dot.female { border-color: var(--avatar-red); background: var(--avatar-red) !important; }

/* ---------- C6: v1-style rings: dark solid/dashed ring, white gap, light tint bg (flat) ---------- */
.theme-c { --ring-male: #4a4b6b; --ring-female: #8f4a42; --ring-spouse: #8a8a8a; }
body.theme-c .avatar { border: var(--ring-w) solid transparent !important; padding: var(--ring-gap); background: #fff; box-shadow: none !important; }
body.theme-c .person.bloodline.male .avatar { border-color: var(--ring-male) !important; }
body.theme-c .person.bloodline.female .avatar { border-color: var(--ring-female) !important; }
body.theme-c .person.spouse .avatar { border-color: transparent !important; }
body.theme-c .person.spouse .avatar-ring { display: block; color: var(--ring-spouse); }
body.theme-c .person.bloodline.male .avatar-photo { background: #d7d7de !important; }
body.theme-c .person.bloodline.female .avatar-photo { background: #e3d1cf !important; }
body.theme-c .person.spouse .avatar-photo { background: #e5e5e5 !important; }
body.theme-c .legend-dot.male { border: 2px solid var(--ring-male) !important; background: #d7d7de !important; }
body.theme-c .legend-dot.female { border: 2px solid var(--ring-female) !important; background: #e3d1cf !important; }
body.theme-c .legend-dot.spouse { border: 2px dashed var(--ring-spouse) !important; background: #e5e5e5 !important; }

/* ---------- C7: transparent gap between ring and tinted bg ---------- */
/* transparent showed connector lines through the gap, so use the page colour */
body.theme-c .avatar { background: var(--bg) !important; }

/* ---------- C8: bluer engraved-ink male ring; no 配 label ---------- */
.theme-c { --ring-male: #34528f; } /* was #4a4b6b */
body.theme-c .person.bloodline.male .avatar-photo { background: #d2d8e6 !important; }
body.theme-c .legend-dot.male { border-color: #34528f !important; background: #d2d8e6 !important; }
body.theme-c .person.spouse .person-name::before { content: none !important; display: none !important; margin: 0 !important; padding: 0 !important; border: 0 !important; }

/* ---------- C9: darker spouse gray; heavier dashed ring (SVG stroke 4.8/100 vs 3.8) ---------- */
.theme-c { --ring-spouse: #7a7a7a; } /* was #8a8a8a */
body.theme-c .person.spouse .avatar-photo { background: #c0c0c0 !important; }
body.theme-c .legend-dot.spouse { border-color: #7a7a7a !important; background: #c0c0c0 !important; }

/* ---------- C10: warm gray spouse bg, lighter dashed ring ---------- */
.theme-c { --ring-spouse: #a39f98; } /* was #7a7a7a */
body.theme-c .person.spouse .avatar-photo { background: #b8b4ad !important; }
body.theme-c .legend-dot.spouse { border-color: #a39f98 !important; background: #b8b4ad !important; }

/* ---------- C11: spouses in darker shades of the page tan (#e2dcd5) ---------- */
.theme-c { --ring-spouse: #a29482; } /* was #a39f98 gray */
body.theme-c .person.spouse .avatar-photo { background: #c4b9ab !important; }
body.theme-c .legend-dot.spouse { border-color: #a29482 !important; background: #c4b9ab !important; }

/* ---------- C12: lines read as structure; names sit on a page-bg backing ---------- */
body.theme-c { --line: #9c8b76; --line-w: 1.25px; }
body.theme-c .person-name, body.theme-c .person-english, body.theme-c .person-dates {
  position: relative; z-index: 1; padding: 0 3px; /* no page-colour backing: it hid couple down-lines; single-parent lines now start below the text (tree.js) */
}
body.theme-c .branch-toggle { border-color: #9c8b76; color: var(--ink); position: relative; z-index: 2; }

/* ---------- C13: 温 (U+6E29) from LXGW WenKai (SC build); WenKai TC draws 温 like 溫 ---------- */
@font-face { font-family: "BrushKaiWen"; src: url("fonts/lxgw-wenkai-medium-u6e29.ttf?v=4g") format("truetype"); font-weight: 700; unicode-range: U+6E29; font-display: block; }
.theme-c .person-name, .theme-c .toolbar button { font-family: "BrushKaiWen", "BrushKai", var(--font); }

/* ---------- v3: spouse ring = connector tone; avatar on page colour ---------- */
.theme-c { --ring-spouse: #9c8b76; }
body.theme-c .person.spouse .avatar-photo { background: #e2dcd5 !important; }
body.theme-c .legend-dot.spouse { border-color: #9c8b76 !important; background: #e2dcd5 !important; }

/* ---------- v3: generation rail (book-spine strip + 白文 世 stamp) ---------- */
body.theme-c { --rail-w: 52px; }
body.theme-c #tree-wrap { padding-left: var(--rail-w); }
.gen-rail { position: fixed; left: 0; bottom: 0; width: var(--rail-w); z-index: 40; pointer-events: none;
  background: #d5ccbf; box-shadow: inset -1px 0 0 #2a2622, inset -4px 0 0 #d5ccbf, inset -5px 0 0 #2a2622; }
.gen-r { position: absolute; left: 0; width: calc(100% - 5px); display: flex; justify-content: center; transform: translateY(-50%);
  opacity: 0; transition: opacity .25s ease; }
.gen-r.on { opacity: 1; }
.gen-l { writing-mode: vertical-rl; font: 700 15px/1 "BrushKaiWen", "BrushKai", var(--font); letter-spacing: .12em; color: var(--ink); }
.gen-shi { display: inline-block; writing-mode: horizontal-tb; width: 17px; height: 17px; margin-top: 4px; font: 700 13px/15px "BrushKai", var(--font);
  text-align: center; color: #efe6da; background: #8f4a42; border: 1.25px solid #8f4a42; border-radius: 1.5px; letter-spacing: 0; filter: url(#seal-worn); }
@media (max-width: 600px) {
  body.theme-c { --rail-w: 30px; }
  .gen-l { font-size: 11px; letter-spacing: .05em; }
  .gen-shi { width: 13px; height: 13px; font-size: 10px; line-height: 11px; margin-top: 3px; }
}

/* rail sits below the fixed header and is clipped there; header always on top */
body[class*="theme-"] .site-header, .site-header { z-index: 50; }
.gen-rail { top: var(--bar-h, 0px); overflow: hidden; z-index: 15; }

/* ===== multiple wives (otherSpouseIds): 妻一/妻二 labels, per-mother child groups + toggles ===== */
.spouse-tag { margin: 0 0 .15rem; font-size: .8rem; line-height: 1; letter-spacing: .1em; color: var(--ink-soft, #6b5f52); font-weight: 600; }
.child-slot.mgroup-start { margin-left: calc(var(--sibling-gap) * 1.2); } /* extra space between mother groups */
.child-slot.mg-hidden { display: none !important; }
/* every per-wife toggle is positioned absolutely by tree.js (left = that wife's drop x) */
body .toggle-row > .branch-toggle, body .toggle-row > .branch-toggle[data-mgroup] { position: absolute; top: 0.55rem; left: 0; translate: -50% 0; }

/* ===== in-laws known by surname only (surnameOnly): rendered as 湯（名未詳） by tree.js ===== */
.person-name.surname-only { letter-spacing: .02em; }

/* ===== tight full-width brackets in names (spans from tree.js bracketText) ===== */
.br-open { margin-left: -0.45em; }
.br-close { margin-right: -0.45em; }

.branch-toggle.wife-empty { visibility: hidden; pointer-events: none; }