/* Concept: a dissection table. The flow chart on top is the map, the 3D stage is the specimen,
   the card on the right is the teacher. One look: xkcd lettering on blue-grey paper, white cards, ink outlines. */
@font-face{font-family:'Humor Sans';src:url(fonts/Humor-Sans.ttf) format('truetype');font-display:block}
@font-face{font-family:'xkcd Script';src:url(fonts/xkcd-script.woff) format('woff');font-display:block}
:root{
  --paper:#96a8c8; --card:#ffffff; --ink:#111214; --muted:#4d5666; --line:#111214; --btn:#6e7b91; --btn-hi:#8896ad;
  --accent:#2a4fd6; --neg:#d8602a; --soft:#eef1f7;
  --head:'Humor Sans','Comic Sans MS','Chalkboard SE',cursive;
  --hand:'xkcd Script','Humor Sans','Comic Sans MS',cursive;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--hand);font-size:17px;line-height:1.35;margin:0;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.app{min-height:100%;display:grid;grid-template-rows:auto auto minmax(0,1fr) auto auto;gap:14px;padding-block:14px;max-width:1500px;margin:0 auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;min-width:0}
.sc{font-family:var(--head);font-variant:small-caps;font-weight:700;letter-spacing:.02em}
.btn{font-family:var(--head);font-variant:small-caps;font-weight:700;background:var(--btn);color:#fff;border:1px solid #2b3240;border-radius:4px;padding:3px 10px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 1px 0 #2b3240;letter-spacing:.03em;font-size:15px}
.btn:hover{background:var(--btn-hi)}
.btn[aria-pressed="true"]{background:var(--ink)}
.btn:disabled{opacity:.5;cursor:default}
/* header */
.top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 22px;padding:10px 16px}
.top h1{margin:0;font-size:28px;line-height:1}
.top h1 small{font-family:var(--hand);font-variant:normal;font-weight:400;font-size:17px;color:var(--muted);margin-left:10px}
.pstat{font-size:14px;color:var(--muted);margin-top:6px}
.pstat:empty{display:none}
.sig{display:flex;align-items:baseline;gap:4px 12px;flex-wrap:wrap;font-size:17px;color:var(--muted)}
.sig b{color:var(--ink);font-size:18px}
.sig a{display:inline-flex;color:var(--accent);transition:transform .12s}
.sig a:hover{transform:scale(1.15)}
.sig svg{width:24px;height:24px;fill:currentColor;flex:none}
/* flow chart */
.flowwrap{padding:12px 16px 10px;overflow-x:auto}
.flowhd{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.flowhd span{font-size:14px;color:var(--muted)}
.flow{display:flex;align-items:center;gap:0;width:max-content;padding-top:14px;padding-bottom:4px}
.node{position:relative;background:none;border:0;padding:7px 10px;margin:0;font-family:var(--hand);font-size:16px;line-height:1.1;text-align:center;white-space:nowrap}
.node .bd{position:absolute;inset:0;border:2px solid var(--ink);border-radius:8px;filter:url(#wob);background:var(--bg,#fff);transition:transform .12s}
.node .tx{position:relative}
.node:hover .bd,.node.hl .bd{transform:scale(1.07);box-shadow:3px 3px 0 var(--ink)}
.node.live .bd{background:#ffe7a3;transform:scale(1.12);box-shadow:3px 3px 0 var(--accent);border-color:var(--accent)}
.node.on .bd{border-width:3px;box-shadow:3px 3px 0 var(--accent);border-color:var(--accent)}
.ar{width:16px;height:0;border-top:2px solid var(--ink);position:relative;flex:none;margin:0 2px}
.ar::after{content:"";position:absolute;right:-1px;top:-6px;border-left:8px solid var(--ink);border-top:5px solid transparent;border-bottom:5px solid transparent}
.bracket{position:relative;display:flex;align-items:center;border:2px dashed var(--ink);border-radius:12px;padding:12px 8px 8px;margin:0 6px;background:#f7f8fb}
.bracket .rep{position:absolute;left:12px;top:-14px;background:#fff;padding:0 8px;font-family:var(--head);font-variant:small-caps;font-weight:700;font-size:15px}
/* stage */
.main{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:14px;min-height:540px}
.stage{position:relative;overflow:hidden;min-height:540px}
.stage canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
.crumbs{position:absolute;left:12px;top:10px;display:flex;gap:8px;align-items:center;font-family:var(--head);font-variant:small-caps;font-weight:700;font-size:17px}
.crumbs .sep{color:var(--muted)}
.cam{position:absolute;right:12px;top:10px;display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.ctl{position:absolute;left:12px;right:12px;bottom:10px;display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:8px;padding:6px 10px}
.ctl label{display:flex;align-items:center;gap:8px;font-size:16px}
.ctl .grp{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.ctl .chipbtn{font-family:var(--hand);font-size:17px;min-width:30px;background:#fff;border:1px solid var(--line);border-radius:4px;padding:0 7px}
.ctl .chipbtn[aria-pressed="true"]{background:var(--ink);color:#fff}
.tip{position:absolute;pointer-events:none;background:var(--ink);color:#fff;border-radius:6px;padding:5px 10px;max-width:260px;font-size:16px;line-height:1.2;z-index:5;display:none}
.tip b{font-family:var(--head);font-variant:small-caps;font-size:17px;display:block}
.hintbar{position:absolute;left:50%;transform:translateX(-50%);top:46px;font-size:15px;color:var(--muted);background:rgba(255,255,255,.85);padding:0 10px;border-radius:10px;white-space:nowrap}
.busy{position:absolute;inset:0;display:none;align-items:center;justify-content:center;background:rgba(255,255,255,.6);z-index:6;font-family:var(--head);font-variant:small-caps;font-weight:700;font-size:22px}
.busy.on{display:flex}
.err{position:absolute;left:12px;right:12px;top:48px;display:none;z-index:7;background:#fff3e8;border:2px solid var(--neg);border-radius:8px;padding:8px 12px;font-size:16px}
.err.on{display:block}
.err .btn{margin-left:8px}
/* readable text under the app: for people and for search engines */
.about{padding:16px 22px 18px}
.about h2{margin:0 0 6px;font-size:24px;line-height:1.1}
.about h3{margin:14px 0 4px;font-size:18px;break-after:avoid}
.about p,.about li{margin:0 0 6px}
.about ol{margin:0;padding-left:22px}
.about a{color:var(--accent)}
.about .cols{columns:2 460px;column-gap:44px}
.about .cols>h3:first-child{margin-top:0}
/* right column */
.side{display:flex;flex-direction:column;max-height:calc(100vh - 120px);min-height:540px}
.tabs{display:flex;gap:6px;padding:10px 12px 0}
.tabs .btn{border-bottom-left-radius:0;border-bottom-right-radius:0}
.pane{padding:12px 18px 16px;overflow:auto;display:flex;flex-direction:column;gap:10px;flex:1;min-height:0;border-top:1px solid var(--line);margin-top:-1px}
.pane[hidden]{display:none}
.pane h2{margin:0;font-size:26px;line-height:1.05}
.tag{align-self:flex-start;font-size:14px;border:1.5px solid var(--ink);border-radius:10px;padding:0 10px;background:var(--bg,#fff)}
.pane p{margin:0}
.pane h3{margin:4px 0 2px;font-size:15px;color:var(--muted);font-family:var(--head);font-variant:small-caps;font-weight:700;letter-spacing:.04em}
.kv{font-family:ui-monospace,Menlo,monospace;font-size:12px;background:var(--soft);border:1px solid #c5ccd9;border-radius:4px;padding:4px 8px;overflow-x:auto;white-space:pre}
.credit{margin-top:auto;font-size:14px;color:var(--muted)}
.mat{display:grid;gap:2px;align-items:center;font-size:13px}
.mat .c{height:22px;border:1px solid #c5ccd9;display:flex;align-items:center;justify-content:center;font-size:11px;border-radius:2px;font-family:ui-monospace,Menlo,monospace}
.mat .c.m{background:repeating-linear-gradient(135deg,#fff 0 3px,#d6dbe6 3px 4px)}
.mat .h{text-align:center;color:var(--muted)}
.mat .r{text-align:right;padding-right:4px}
.mat .on{outline:2px solid var(--accent);outline-offset:-1px}
.legend{display:flex;flex-wrap:wrap;gap:4px 12px;font-size:14px}
.legend i{display:inline-block;width:11px;height:11px;border-radius:50%;border:1px solid var(--ink);margin-right:4px;vertical-align:-1px}
input[type=range]{accent-color:var(--ink);width:120px}
/* chat */
.msgs{display:flex;flex-direction:column;gap:8px;overflow:auto;flex:1;min-height:120px}
.bub{border:1.5px solid var(--ink);border-radius:10px;padding:6px 10px;max-width:92%;white-space:pre-wrap;word-break:break-word}
.bub.bot{background:#eef1f7;align-self:flex-start}
.bub.me{background:#f5d98a;align-self:flex-end}
.bub .gen{color:var(--accent)}
.bub .tools{margin-top:6px;display:flex;gap:6px}
.sugg{display:flex;flex-wrap:wrap;gap:6px}
.sugg .btn{font-size:14px;padding:1px 8px}
.composer{display:flex;gap:6px}
.composer input{flex:1;min-width:0;border:1px solid var(--line);border-radius:4px;padding:3px 10px;background:#fff;font-size:18px}
.chatopt{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--muted)}
@media (max-width:1000px){
  .main{grid-template-columns:minmax(0,1fr)}
  .stage{display:flex;flex-direction:column;min-height:0}
  .stage canvas{order:3;height:58vh;min-height:340px;flex:none}
  .crumbs,.cam{position:static;order:1;padding:8px 12px 0;justify-content:flex-start}
  .cam{order:2;padding-bottom:8px}
  .ctl{position:static;order:4;border-radius:0 0 12px 12px;border-width:1px 0 0;background:#fff}
  .hintbar{display:none}
  .side{max-height:none;min-height:0}
}