:root{
  color-scheme:light;
  --bg:#EDF1EE; --surface:#F8FAF8; --ink:#16211D; --muted:#586861; --line:#CBD5CF;
  --halo:rgba(248,250,248,.85); --band:rgba(22,33,29,.05); --ring:rgba(22,33,29,.13);
  --accent:#0F6479; --accent-soft:rgba(15,100,121,.13); --answer:#C2410C; --answer-soft:rgba(194,65,12,.12); --guess:#16211D;
  --good:#2E7D32; --good-soft:rgba(46,125,50,.14);
  /* categorical branch colours, validated in this order on this surface */
  --cat-0:#2a78d6; --cat-1:#eb6834; --cat-2:#1baf7a; --cat-3:#eda100;
  --cat-4:#e87ba4; --cat-5:#008300; --cat-6:#4a3aa7; --cat-7:#e34948; --branch-neutral:#7d8a84;
  --cell-l:81%; --cell-s:46%; --br-l:36%; --br-s:45%;
  --serif:"Literata",Georgia,"Times New Roman",serif;
  --sans:"Figtree",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#101614; --surface:#17201D; --ink:#E3EBE7; --muted:#95A59E; --line:#2A3632;
    --halo:rgba(16,22,20,.85); --band:rgba(227,235,231,.05); --ring:rgba(227,235,231,.12);
    --accent:#63C7DC; --accent-soft:rgba(99,199,220,.15); --answer:#F2894A; --answer-soft:rgba(242,137,74,.16); --guess:#E3EBE7;
    --good:#7BCB80; --good-soft:rgba(123,203,128,.16);
    --cat-0:#3987e5; --cat-1:#d95926; --cat-2:#199e70; --cat-3:#c98500;
    --cat-4:#d55181; --cat-5:#008300; --cat-6:#9085e9; --cat-7:#e66767; --branch-neutral:#8a9892;
    --cell-l:31%; --cell-s:32%; --br-l:70%; --br-s:42%;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#101614; --surface:#17201D; --ink:#E3EBE7; --muted:#95A59E; --line:#2A3632;
  --halo:rgba(16,22,20,.85); --band:rgba(227,235,231,.05); --ring:rgba(227,235,231,.12);
  --accent:#63C7DC; --accent-soft:rgba(99,199,220,.15); --answer:#F2894A; --answer-soft:rgba(242,137,74,.16); --guess:#E3EBE7;
    --good:#7BCB80; --good-soft:rgba(123,203,128,.16);
    --cat-0:#3987e5; --cat-1:#d95926; --cat-2:#199e70; --cat-3:#c98500;
    --cat-4:#d55181; --cat-5:#008300; --cat-6:#9085e9; --cat-7:#e66767; --branch-neutral:#8a9892;
  --cell-l:31%; --cell-s:32%; --br-l:70%; --br-s:42%;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.5;padding-inline:16px;padding-block:20px 32px}
.wrap{max-width:1240px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
header{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px}
.titles{display:flex;flex-direction:column;gap:6px;min-width:0;flex:1 1 420px}
.modes{display:inline-grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:10px;padding:3px;background:var(--surface);gap:3px}
.modes button{border:0;border-radius:7px;background:transparent;padding:8px 22px;font-weight:700;font-size:15px;color:var(--muted)}
.modes button[aria-selected="true"]{background:var(--ink);color:var(--surface)}
body.playing .modes button[aria-selected="true"]{background:var(--accent);color:var(--surface)}
body.playing .stage > svg{outline:2px solid var(--accent);outline-offset:-2px;border-radius:10px}
.mode-panels{display:flex;flex-direction:column;gap:14px}
#game-body,.game-panel{display:flex;flex-direction:column;gap:14px}
.eyebrow{margin:0;font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);font-weight:700}
h1{font-family:var(--serif);font-weight:600;font-size:30px;margin:0;letter-spacing:-.01em;text-wrap:balance}
.lede{margin:0;color:var(--muted);max-width:70ch;text-wrap:pretty}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px;align-items:start}
@media (max-width:860px){.layout{grid-template-columns:1fr}}
.stage{position:relative;width:100%;max-width:880px;min-width:0;justify-self:center}
.stage > svg{display:block;width:100%;height:auto;aspect-ratio:1;touch-action:none;user-select:none;-webkit-user-select:none}
.zoomctl{position:absolute;right:6px;bottom:6px;display:flex;flex-direction:column;gap:4px}
.zoomctl button{width:34px;height:34px;font-size:18px;line-height:1;padding:0}
button{font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:6px 12px;cursor:pointer}
button:hover{border-color:var(--muted)}
button:disabled{opacity:.45;cursor:not-allowed}
button.primary{background:var(--accent);border-color:var(--accent);color:var(--surface);font-weight:700}
button:focus-visible,a:focus-visible,input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
aside{display:flex;flex-direction:column;gap:14px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;display:flex;flex-direction:column;gap:10px}
.panel h2{font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:0;font-weight:700}
.toggles{display:flex;flex-direction:column;gap:6px}
.toggles label{display:flex;gap:9px;align-items:center;cursor:pointer}
.toggles input{accent-color:var(--accent);width:16px;height:16px;margin:0}
.crumbs{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.crumbs li{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:baseline;padding:3px 6px;margin-inline:-6px;border-radius:5px;cursor:pointer}
.crumbs li:hover{background:var(--accent-soft)}
.crumbs .n{font-family:var(--serif);font-weight:600}
.crumbs .c{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crumbs .a{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.crumbs li:last-child .n{color:var(--accent)}
.hint{color:var(--muted);font-size:13.5px;margin:0}
.hint.warm{color:var(--answer)}
.hint.good{color:var(--good)}
.legend{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px;font-size:14px}
.legend b{font-weight:600}
.photo{border:1.5px dashed var(--line);border-radius:8px;padding:18px 14px;text-align:center;display:flex;flex-direction:column;gap:2px}
.photo .cn{font-family:var(--serif);font-size:22px;font-weight:600}
.photo .sp{font-family:var(--serif);font-style:italic;color:var(--muted)}
.photo small{color:var(--muted);font-size:12px;margin-top:6px;overflow-wrap:anywhere}
.photo small a{color:var(--accent)}
.photo img{display:block;width:100%;max-height:300px;object-fit:contain;border-radius:6px;background:var(--bg)}
.photo:has(img:not([hidden])){padding:8px}
.tlabel .n.sp{font-style:italic;font-weight:500}
.pick{display:flex;flex-direction:column}
.field{display:flex;flex-direction:column;gap:4px}
.field select{font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:6px 8px;max-width:100%}
.stage{display:flex;flex-direction:column;gap:8px}
.viewing{display:flex;align-items:center;gap:8px;min-width:0;padding:4px 10px 4px 4px;background:var(--surface);border:1px solid var(--line);border-radius:8px}
.vspacer{flex:1}
.viewing #maximize,.viewing #panel-toggle{width:auto;height:30px;padding:0 10px;font-size:13px;font-weight:600;white-space:nowrap}
.viewing #panel-toggle[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
/* maximized: the map fills the window */
body.maximized{overflow:hidden}
body.maximized .wrap > header{display:none}
body.maximized .layout{position:fixed;inset:0;z-index:30;background:var(--bg);padding:12px 16px;padding-top:calc(12px + env(safe-area-inset-top, 0px));padding-bottom:calc(12px + env(safe-area-inset-bottom, 0px));grid-template-columns:minmax(0,1fr);align-items:stretch}
body.maximized.show-panel .layout{grid-template-columns:minmax(0,1fr) 340px}
body.maximized aside{display:none;overflow:auto;min-height:0}
body.maximized.show-panel aside{display:flex}
body.maximized .stage{max-width:none;height:100%;min-height:0;justify-self:stretch}
body.maximized .stage > svg{flex:1 1 0;min-height:0;width:auto;max-width:100%;height:auto;margin:0 auto}
body.maximized .treeview{flex:1 1 0;height:auto;min-height:0}
@media (max-width:860px){
  body.maximized.show-panel .layout{grid-template-columns:minmax(0,1fr)}
  body.maximized.show-panel aside{position:fixed;top:0;right:0;bottom:0;width:min(360px,90vw);z-index:31;background:var(--bg);padding:12px;border-left:1px solid var(--line);box-shadow:-8px 0 24px rgba(0,0,0,.2)}
}
/* tree view */
.treeview{position:relative;width:100%;height:min(80vh,900px);min-height:420px;overflow:auto;scrollbar-gutter:stable;background:var(--surface);border:1px solid var(--line);border-radius:10px}
.tv-axis{position:sticky;top:0;z-index:1;background:var(--surface);border-bottom:1px solid var(--line)}
.tv-axis svg,.tv-svg{display:block}
.tv-svg{cursor:crosshair;user-select:none;-webkit-user-select:none}
.tv-svg .tcount{fill:var(--muted);font-family:var(--sans)}
.tv-svg .cname{fill:var(--ink);font-family:var(--sans);font-weight:700}
.tv-svg image{clip-path:inset(0 round 5px)}
body.playing .treeview{outline:2px solid var(--accent);outline-offset:-2px}
body.view-tree .only-radial,body.view-radial .only-tree{display:none}
/* settings menu */
header{position:relative}
#modes{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.settings-wrap{position:relative}
#settings-btn{padding:9px 14px;font-weight:700}
.settings{position:absolute;right:0;top:calc(100% + 8px);z-index:20;width:min(360px,calc(100vw - 32px));max-height:min(80vh,640px);overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.18);padding:14px 16px;display:flex;flex-direction:column;gap:14px}
.settings-head{display:flex;justify-content:space-between;align-items:center}
.settings-head h2{margin:0;font-family:var(--serif);font-size:19px}
.settings-head button{width:32px;height:32px;padding:0}
.settings section{display:flex;flex-direction:column;gap:6px}
.settings h3{margin:0;font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.settings .stack{display:flex;flex-direction:column;gap:6px}
.settings .seg{align-self:flex-start;flex-wrap:wrap}
.settings .tree-settings.inactive{opacity:.6}
.check{display:flex;gap:9px;align-items:center;cursor:pointer}
.check input{accent-color:var(--accent);width:16px;height:16px;margin:0;flex:none}
.viewing button{width:30px;height:30px;padding:0;font-size:16px;line-height:1}
.viewing .vn{font-family:var(--serif);font-weight:600}
.viewing .vc{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pick strong{font-family:var(--serif);font-weight:600}
.exphoto{margin:0;display:flex;flex-direction:column;gap:6px}
.exphoto img{display:block;width:100%;max-height:320px;object-fit:contain;border-radius:6px;background:var(--bg)}
.exphoto figcaption{display:flex;flex-direction:column}
.exphoto strong{font-family:var(--serif);font-weight:600;font-size:17px}
.exphoto em{font-family:var(--serif);color:var(--muted)}
.exphoto .lived{font-size:13.5px;color:var(--answer);font-weight:600}
.exphoto small{color:var(--muted);font-size:12px;margin-top:4px;overflow-wrap:anywhere}
.exphoto small a,.photo small a{color:var(--accent)}
.thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;align-items:center}
.thumbs .thumb{padding:0;border-radius:6px;overflow:hidden;aspect-ratio:1;border:1px solid var(--line);background:var(--bg)}
.thumbs .thumb:hover{border-color:var(--accent)}
.thumbs .thumb img{display:block;width:100%;height:100%;object-fit:cover}
.thumbs .hint{grid-column:1/-1}
.thumbs .thumb-text{aspect-ratio:auto;min-height:44px;padding:6px;font-size:12.5px;line-height:1.25;text-align:center}
.result{display:flex;flex-direction:column;gap:6px}
.score{font-size:30px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.1}
.score span{font-size:14px;font-weight:500;color:var(--muted)}
.bar{height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);transition:width .6s}
.kv{display:grid;grid-template-columns:auto 1fr;gap:2px 12px;font-size:14px;margin:0}
.kv dt{color:var(--muted)}
.kv dd{margin:0;font-family:var(--serif)}
.swatch{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px}

/* shared SVG vocabulary */
.fill-h{fill:hsl(var(--h,150),var(--cell-s),calc(var(--cell-l) + var(--dl,0%)))}
.stroke-h{stroke:hsl(var(--h,150),var(--br-s),var(--br-l));fill:none;stroke-linecap:round}
.dot-h{fill:hsl(var(--h,150),var(--br-s),var(--br-l))}
.stroke-c{stroke:var(--c,var(--branch-neutral));fill:none;stroke-linecap:round}
.fill-c{fill:var(--c,var(--branch-neutral));fill-opacity:.32;stroke:var(--c,var(--branch-neutral));stroke-width:1px}
.dot-c{fill:var(--c,var(--branch-neutral))}
.band{fill:var(--band)}
.band.off{fill:none}
.ring{fill:none;stroke:var(--ring)}
.eralabel{fill:var(--muted);font-family:var(--sans);font-weight:600;text-anchor:middle;dominant-baseline:central}
.halo{paint-order:stroke;stroke:var(--halo);stroke-linejoin:round}
.tlabel{fill:var(--ink);dominant-baseline:central}
.tlabel .n{font-family:var(--serif);font-weight:600}
.tlabel .n.grp{font-style:normal;font-weight:600}
.tlabel .c{font-family:var(--sans);fill:var(--muted);font-weight:400}
.clabel{font-family:var(--sans);font-weight:700;text-transform:uppercase;fill:var(--ink);dominant-baseline:central}
.hl-area{fill:var(--accent-soft);stroke:var(--accent);pointer-events:none}
.hl-line{stroke:var(--accent);fill:none;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.hl-dot{fill:var(--accent);pointer-events:none}
.ghost{stroke:var(--muted);fill:none;opacity:.55;stroke-linecap:round}
.pin{pointer-events:none}
.pin path{stroke:var(--surface);stroke-width:1.5}
.pin.guess path{fill:var(--guess)}
.pin.answer path{fill:var(--answer)}
.pin.pick path{fill:var(--accent)}
.pin circle{fill:var(--surface)}
.pin text{fill:var(--ink);font:700 10px var(--sans);text-anchor:middle;dominant-baseline:central}
.hl-area.soft{fill:none;stroke:var(--muted);stroke-dasharray:5 5}
.hl-area.pair{fill:var(--good-soft);stroke:var(--good)}
.hl-line.alt{stroke:var(--answer)}
.hl-line.pair{stroke:var(--good)}
.hl-ring{fill:none;stroke:var(--accent)}
.hl-ring.pair{stroke:var(--good)}
.hl-ring.answer{stroke:var(--answer)}
.hl-ring-label{fill:var(--accent);font-family:var(--sans);font-weight:700;dominant-baseline:central}
.hl-ring-label.pair{fill:var(--good)}
.hl-ring-label.answer{fill:var(--answer)}
.hl-area.wrong{fill:var(--answer-soft);stroke:var(--answer)}
.hl-area.hint{fill:var(--accent-soft);stroke:var(--accent);stroke-dasharray:6 4}
.pin.warm path{fill:var(--answer)}
.pin.cold path{fill:var(--muted)}
/* game widgets */
.searchrow{display:flex;gap:6px}
.searchrow input{flex:1;min-width:0;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:6px 8px}
.guesses{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;font-size:14px}
.guesses li{display:grid;grid-template-columns:22px 1fr auto;gap:6px;align-items:baseline;padding:4px 6px;border-radius:6px;background:var(--bg)}
.guesses li.best{background:var(--answer-soft)}
.guesses li.win{background:var(--good-soft)}
.guesses .no{color:var(--muted);font-variant-numeric:tabular-nums}
.guesses .where{color:var(--muted);font-size:12.5px;grid-column:2/-1}
.guesses .age{font-variant-numeric:tabular-nums;font-weight:700}
.slider{display:flex;flex-direction:column;gap:4px}
.slider input{width:100%;accent-color:var(--accent)}
.slider output{font-weight:700;font-size:17px;font-variant-numeric:tabular-nums}
.options{display:flex;flex-direction:column;gap:6px}
.options button{text-align:left;display:flex;flex-direction:column;gap:1px;padding:8px 12px}
.options button span{color:var(--muted);font-size:13px}
.options button.right{border-color:var(--good);background:var(--good-soft);box-shadow:inset 0 0 0 2px var(--good)}
.options button.wrong{border-color:var(--answer);background:var(--answer-soft);box-shadow:inset 0 0 0 2px var(--answer)}
.seg{display:inline-grid;grid-auto-flow:column;border:1px solid var(--line);border-radius:7px;overflow:hidden}
.seg button{border:0;border-radius:0;background:transparent;padding:6px 12px;font-weight:600;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--surface)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips button{padding:6px 10px;font-weight:600}
.chips button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}
.cladograms{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.cladograms.one{grid-template-columns:1fr}
/* Build the tree */
.bt{display:flex;flex-direction:column;gap:10px}
.bt-tree{position:relative;width:100%}
.bt-tree svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.bt-tree .edge{stroke:var(--ink);fill:none;stroke-width:2.5px;stroke-linecap:round;vector-effect:non-scaling-stroke}
.bt-tree .edge.ok{stroke:var(--good)}
.bt-tree .edge.bad{stroke:var(--answer)}
.bt-slot{position:absolute;right:0;height:46px;display:flex;align-items:center;border-radius:8px;font-size:12.5px;color:var(--muted)}
.bt-slot.empty{border:1.5px dashed var(--line);padding:0 10px;cursor:pointer;background:var(--bg)}
.bt-slot.over{outline:2px solid var(--accent);outline-offset:1px;background:var(--accent-soft)}
.bt-slot .bt-chip{width:100%}
.bt-tray{display:flex;flex-direction:column;gap:6px;min-height:46px;padding:6px;border:1.5px dashed var(--line);border-radius:8px}
.bt-tray:empty{display:none}
.bt-chip{display:grid;grid-template-columns:36px auto 1fr;gap:8px;align-items:center;height:46px;padding:4px 8px 4px 4px;background:var(--surface);border:1px solid var(--line);border-radius:8px;cursor:grab;touch-action:none;user-select:none;-webkit-user-select:none}
.bt-chip img{width:36px;height:36px;object-fit:cover;border-radius:6px;background:var(--bg);pointer-events:none}
.bt-chip b{font-size:12px;letter-spacing:.06em;color:var(--muted)}
.bt-chip span{font-family:var(--serif);font-weight:600;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink)}
.bt-chip.picked{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:var(--accent-soft)}
.bt-chip.dragging{opacity:.35}
.bt-chip.ghost{position:fixed;z-index:50;pointer-events:none;transform:translate(-50%,-50%);box-shadow:0 6px 18px rgba(0,0,0,.18);cursor:grabbing}
.cladograms figure{margin:0;display:flex;flex-direction:column;gap:4px}
.cladograms figcaption{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.cladograms svg{width:100%;height:auto;display:block}
.cladograms .edge{stroke:var(--ink);fill:none;stroke-width:2;stroke-linecap:round}
.cladograms .edge.ok{stroke:var(--good)}
.cladograms .edge.bad{stroke:var(--answer)}
.cladograms text{fill:var(--ink);font:700 13px var(--sans);dominant-baseline:central}
.pin.pair path{fill:var(--good)}
.trio{display:flex;flex-direction:column;gap:8px}
.trio .card{display:grid;grid-template-columns:96px 1fr;gap:10px;align-items:center;text-align:left;padding:6px;border-radius:8px}
.trio .card img{width:96px;height:96px;object-fit:cover;border-radius:6px;background:var(--bg);display:block}
.trio .card .t{display:flex;flex-direction:column;gap:2px;min-width:0}
.trio .card .letter{font-weight:800;font-size:12px;letter-spacing:.08em;color:var(--muted)}
.trio .card strong{font-family:var(--serif);font-weight:600;line-height:1.25}
.trio .card em{font-family:var(--serif);color:var(--muted);font-size:13.5px}
.trio .card small{color:var(--muted);font-size:11.5px;overflow-wrap:anywhere}
.trio .card[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}
.trio .card.odd{opacity:.55}
.trio .card.right{border-color:var(--good);background:var(--good-soft);box-shadow:inset 0 0 0 2px var(--good)}
.trio .card.outgroup{border-color:var(--answer);background:var(--answer-soft);box-shadow:inset 0 0 0 2px var(--answer)}
.trio .tags{display:flex;flex-wrap:wrap;gap:4px}
.trio .tag{font-size:11.5px;font-weight:700;padding:1px 7px;border-radius:999px;border:1px solid var(--line);color:var(--muted);background:var(--surface)}
.trio .tag.pair{color:var(--good);border-color:var(--good)}
.trio .tag.outgroup{color:var(--answer);border-color:var(--answer)}
.verdict{font-weight:700;font-size:17px}
.tally{display:flex;gap:16px;color:var(--muted);font-size:13.5px;font-variant-numeric:tabular-nums}
.tally b{color:var(--ink)}
@media (prefers-reduced-motion:reduce){.bar i{transition:none}}