/* Fly Brain Bench — a single committed dark instrument palette.
   Every colour is painted explicitly; nothing inherits from the host. */
:root{
  --ground:#0B1114; --well:#070C0F; --panel:#101A1E; --panel2:#152227; --raise:#1A292F;
  --line:#22343B; --line2:#2E444C;
  --ink:#ECE8E0; --ink2:#9EACB1; --ink3:#66787F;
  --ach:#F2A93B; --gaba:#479AE0; --glu:#A472DE; --dop:#59C78C; --ser:#E0739F; --oct:#4CC7CC;
  --hot:#FFF1D8; --danger:#E8654B;
  --r:10px; --rs:6px;
  --fd:'Archivo',system-ui,sans-serif;
  --fb:'IBM Plex Sans',system-ui,sans-serif;
  --fm:'IBM Plex Mono',ui-monospace,monospace;
  --rail:268px; --railR:310px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--ground); color:var(--ink);
  font-family:var(--fb); font-size:14px; line-height:1.5;
  display:grid; grid-template-rows:auto 1fr auto; overflow:hidden;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:var(--fm); font-variant-numeric:tabular-nums}
.dim{color:var(--ink3)}
h1,h2,h3{font-family:var(--fd); font-weight:600; margin:0; text-wrap:balance}
button{font:inherit; cursor:pointer; border:0; background:none; color:inherit}
button:focus-visible,input:focus-visible{outline:2px solid var(--ach); outline-offset:2px}
.eyebrow{font-family:var(--fm); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink3); margin:0}

/* ---------- top bar ---------- */
.top{
  display:flex; align-items:center; gap:22px; padding:11px 18px;
  background:var(--panel); border-bottom:1px solid var(--line);
}
.brand{display:flex; align-items:center; gap:11px; min-width:0}
.brand h1{font-size:15px; letter-spacing:-.01em}
.brand p{margin:0; font-size:11.5px; color:var(--ink3)}
.mark{
  width:26px; height:26px; border-radius:50%; flex:none;
  background:radial-gradient(circle at 34% 32%, var(--hot) 0 12%, var(--ach) 18% 34%, #7A4A12 46% 62%, #1B2A31 74%);
  box-shadow:0 0 16px rgba(242,169,59,.42);
}
.top-stats{margin-left:auto; display:flex; gap:18px; font-size:12px; color:var(--ink3)}
.top-stats b{color:var(--ink); font-weight:500}
.ghost{
  padding:7px 13px; border:1px solid var(--line2); border-radius:var(--rs);
  color:var(--ink2); font-size:12.5px; transition:.15s;
}
.ghost:hover{border-color:var(--ach); color:var(--ink)}

/* ---------- layout ---------- */
main{display:grid; grid-template-columns:var(--rail) minmax(0,1fr) var(--railR); min-height:0}
main > *{min-width:0}
.rail{background:var(--panel); overflow-y:auto; padding:14px 0 22px}
.rail.left{border-right:1px solid var(--line)}
.rail.right{border-left:1px solid var(--line); display:flex; flex-direction:column; gap:2px}
.rail-title{
  font-family:var(--fm); font-size:10.5px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink3); padding:0 16px; margin:0 0 10px; display:flex; justify-content:space-between; align-items:baseline;
}

/* ---------- stimulus library ---------- */
.lib-head{
  font-family:var(--fm); font-size:10px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink3); padding:16px 16px 6px; border-top:1px solid var(--line); margin-top:10px;
}
.lib-head:first-child{border-top:0; margin-top:0; padding-top:2px}
.preset{
  display:flex; align-items:center; gap:10px; width:100%; text-align:left;
  padding:9px 16px; color:var(--ink2); border-left:2px solid transparent; transition:.14s;
}
.preset:hover:not(:disabled){background:var(--panel2); color:var(--ink)}
.preset.on{background:var(--raise); color:var(--ink); border-left-color:var(--ach)}
.preset:disabled{opacity:.3; cursor:not-allowed}
.p-name{flex:1; font-size:13.5px}
.p-count{font-family:var(--fm); font-size:11px; color:var(--ink3)}
.preset.on .p-count{color:var(--ach)}

/* ---------- the well ---------- */
.well-wrap{position:relative; background:var(--well); min-width:0}
#well{width:100%; height:100%; display:block; touch-action:none}
.well-hint{
  position:absolute; left:14px; bottom:12px; font-family:var(--fm); font-size:10.5px;
  letter-spacing:.06em; color:var(--ink3); pointer-events:none;
  max-width:calc(100% - 200px);   /* stay clear of the legend */
}
#inspect{
  position:absolute; right:14px; top:14px; width:214px; padding:12px 13px;
  background:rgba(16,26,30,.93); border:1px solid var(--line2); border-radius:var(--r);
  backdrop-filter:blur(7px); opacity:0; transform:translateY(-4px); pointer-events:none; transition:.18s;
}
#inspect.show{opacity:1; transform:none}
.ins-type{font-family:var(--fm); font-size:13px; color:var(--ach); margin-bottom:8px; word-break:break-all}
#inspect dl{display:grid; grid-template-columns:auto 1fr; gap:3px 10px; margin:0; font-size:11.5px}
#inspect dt{color:var(--ink3)}
#inspect dd{margin:0; color:var(--ink2); text-align:right}
#inspect dd.num{font-family:var(--fm); color:var(--ink)}

/* ---------- right rail ---------- */
.sel{padding:0 16px 16px; border-bottom:1px solid var(--line)}
.sel .rail-title{padding:0}
.sel-name{font-family:var(--fd); font-size:17px; font-weight:600; margin:0 0 3px; line-height:1.25}
.sel-meta{font-size:11.5px; color:var(--ink3); margin:0 0 9px}
.sel-meta b{color:var(--ach); font-weight:500}
.sel-why{font-size:12.5px; color:var(--ink2); margin:0 0 11px; max-width:40ch}
.sel-types{display:grid; grid-template-columns:1fr auto; gap:2px 10px; font-size:11px}
.sel-types code{font-family:var(--fm); color:var(--ink2); overflow:hidden; text-overflow:ellipsis}
.sel-types span{font-family:var(--fm); color:var(--ink3)}
.resp-wrap{padding:16px 16px 0; overflow-y:auto; flex:1; min-height:0}
.resp{display:grid; grid-template-columns:1fr 76px 26px; align-items:center; gap:8px; padding:3px 0}
.r-name{font-family:var(--fm); font-size:11.5px; color:var(--ink2); overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.r-bar{height:5px; background:var(--line); border-radius:3px; overflow:hidden}
.r-bar i{display:block; height:100%; background:linear-gradient(90deg,var(--ach),var(--hot)); border-radius:3px; transition:width .22s}
.r-n{font-family:var(--fm); font-size:10.5px; color:var(--ink3); text-align:right}
.empty{font-size:12px; color:var(--ink3); margin:0}

/* ---------- transport ---------- */
.transport{
  display:flex; align-items:center; gap:22px; padding:10px 18px;
  background:var(--panel); border-top:1px solid var(--line); flex-wrap:wrap;
}
.tp-controls{display:flex; gap:8px}
.primary{
  padding:7px 20px; border-radius:var(--rs); background:var(--ach); color:#150E03;
  font-weight:600; font-size:12.5px; transition:.15s;
}
.primary:hover{background:var(--hot)}
.primary.on{background:var(--raise); color:var(--ink); box-shadow:inset 0 0 0 1px var(--line2)}
.slider{display:flex; align-items:center; gap:9px; font-size:11.5px; color:var(--ink3)}
.slider input{width:112px; accent-color:var(--ach)}
.slider .mono{color:var(--ink2); font-size:11px; min-width:78px}
.legend{margin-left:auto; display:flex; gap:13px; flex-wrap:wrap}
.leg{display:flex; align-items:center; gap:5px; font-size:10.5px; color:var(--ink3)}
.leg i{width:7px; height:7px; border-radius:50%; display:block}

/* ---------- boot / primer ---------- */
#boot{
  position:fixed; inset:0; z-index:50; background:var(--ground);
  display:grid; place-items:center; overflow-y:auto; transition:opacity .6s;
}
#boot.done{opacity:0; pointer-events:none}
.boot-inner{width:min(1080px,100%); padding:40px 28px; display:grid; gap:30px}
.boot-head h1{font-size:clamp(28px,4.4vw,46px); line-height:1.08; letter-spacing:-.025em; margin-top:10px}
.primer{display:grid; grid-template-columns:repeat(auto-fit,minmax(258px,1fr)); gap:14px}
.card{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--r); padding:18px 17px;
  display:flex; flex-direction:column; gap:8px;
}
.card .n{font-family:var(--fm); font-size:10px; letter-spacing:.16em; text-transform:uppercase; color:var(--ink3)}
.card h2{font-size:16.5px; line-height:1.25}
.card p{margin:0; font-size:13px; color:var(--ink2)}
.card strong{color:var(--ink); font-weight:600}
.card em{color:var(--ach); font-style:normal}
.c1{border-top:2px solid var(--gaba)} .c2{border-top:2px solid var(--ach)} .c3{border-top:2px solid var(--glu)}
.bucket{margin-top:4px; background:var(--well); border-radius:var(--rs); padding:5px 0}
.bucket svg{width:100%; height:78px; display:block}
.bucket .th{stroke:var(--danger); stroke-width:1; opacity:.65}
.bucket .rest{stroke:var(--line2); stroke-width:1}
.bucket .tr{fill:none; stroke:var(--ach); stroke-width:1.5; stroke-linejoin:round}
.bucket .lbl{fill:var(--ink3); font-family:var(--fm); font-size:8px}
.boot-foot{display:grid; gap:8px; max-width:520px}
.load-row{display:flex; justify-content:space-between; font-size:12px; color:var(--ink2)}
.track{height:3px; background:var(--line); border-radius:2px; overflow:hidden}
#loadBar{height:100%; width:0; background:linear-gradient(90deg,var(--ach),var(--hot)); transition:width .3s}
#loadDetail{margin:0; font-size:11.5px; color:var(--ink3)}
#loadDetail.err{color:var(--danger)}

/* ---------- explainer ---------- */
#explainer{
  position:fixed; inset:0; z-index:60; background:rgba(5,9,11,.82); backdrop-filter:blur(3px);
  display:none; overflow-y:auto; padding:28px 20px;
}
#explainer.open{display:block}
.ex-sheet{
  width:min(1000px,100%); margin:0 auto; background:var(--panel);
  border:1px solid var(--line2); border-radius:14px; position:relative;
}
.ex-close{
  position:absolute; right:12px; top:10px; width:30px; height:30px; border-radius:var(--rs);
  color:var(--ink3); font-size:21px; line-height:1;
}
.ex-close:hover{background:var(--panel2); color:var(--ink)}
.ex-body{padding:28px 30px 26px}
.ex-title{font-size:clamp(22px,3vw,32px); letter-spacing:-.02em; margin:6px 0 22px}
.ex-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(288px,1fr)); gap:13px}
.ex-card{
  background:var(--panel2); border:1px solid var(--line); border-left:3px solid var(--line2);
  border-radius:var(--rs); padding:16px 17px;
}
.ex-card h3{font-size:14.5px; margin:0 0 8px; display:flex; gap:9px; align-items:baseline; line-height:1.3}
.ex-card .k{
  font-family:var(--fm); font-size:11px; color:var(--ground); background:var(--ink3);
  width:18px; height:18px; border-radius:4px; display:grid; place-items:center; flex:none;
}
.ex-card p{margin:0 0 9px; font-size:12.8px; color:var(--ink2); max-width:52ch}
.ex-card p:last-child{margin-bottom:0}
.ex-card strong{color:var(--ink); font-weight:600}
.ex-card ul{margin:0; padding-left:17px; font-size:12.8px; color:var(--ink2); display:grid; gap:7px}
.aside{font-size:11.5px !important; color:var(--ink3) !important; border-top:1px solid var(--line); padding-top:8px}
.k-map{border-left-color:var(--gaba)} .k-map .k{background:var(--gaba)}
.k-cell{border-left-color:var(--ach)} .k-cell .k{background:var(--ach)}
.k-sign{border-left-color:var(--glu)} .k-sign .k{background:var(--glu)}
.k-do{border-left-color:var(--dop)} .k-do .k{background:var(--dop)}
.k-not{border-left-color:var(--danger)} .k-not .k{background:var(--danger)}
.k-why{border-left-color:var(--line2)}
.cmp{display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:12px !important}
.cmp span{font-size:11px; color:var(--ink3); font-family:var(--fm)}
.cmp b{display:block; font-family:var(--fd); font-size:19px; color:var(--ink); font-weight:600}
.cmp i{font-style:normal}
.ex-src{margin:20px 0 0; font-size:11px; color:var(--ink3); border-top:1px solid var(--line); padding-top:13px}

/* ---------- dashboard layout ---------- */
main{grid-template-columns:var(--rail) minmax(0,1fr) var(--railR)}
.centre{display:grid; grid-template-rows:minmax(0,1fr) auto; min-width:0; min-height:0}
.channels{background:var(--panel); border-top:1px solid var(--line); padding:10px 14px 12px}
.channels .rail-title{padding:0; margin-bottom:8px}
#chanBody{display:grid; grid-template-columns:repeat(auto-fit,minmax(168px,1fr)); gap:4px 18px}
.chan{display:grid; grid-template-columns:1fr 54px 26px; align-items:center; gap:8px}
.c-name{display:flex; flex-direction:column; line-height:1.2; font-size:11.5px; color:var(--ink2); min-width:0}
.c-name i{font-style:normal; font-family:var(--fm); font-size:9px; color:var(--ink3);
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.c-bar{height:4px; background:var(--line); border-radius:3px; overflow:hidden}
.c-bar em{display:block; height:100%; width:0; border-radius:3px;
  background:linear-gradient(90deg,var(--dop),var(--ach)); transition:width .18s}
.c-hz{font-size:10px; color:var(--ink3); text-align:right}

/* right rail panels */
.rail.right{display:flex; flex-direction:column; gap:0; padding:0}
.panel{padding:13px 15px; border-bottom:1px solid var(--line)}
.panel.grow{flex:1; min-height:0; overflow-y:auto; border-bottom:0}
.panel .rail-title{padding:0}
.rail-title.mt{margin-top:15px}
.fly-panel{display:flex; flex-direction:column; gap:8px}
#flywell{width:100%; height:186px; display:block; border-radius:var(--rs);
  background:var(--well); touch-action:none; cursor:grab}
#flywell:active{cursor:grabbing}
.beh{color:var(--ach); text-transform:lowercase; font-size:11px}
.tiny{font-size:11px; color:var(--ink2); margin:0 0 8px; line-height:1.45}
.tiny.note{color:var(--ink3); border-top:1px solid var(--line); padding-top:8px; margin-top:10px; margin-bottom:0}
.tiny.note strong{color:var(--ink2)}

/* behaviour picker + training */
.behave-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:4px; margin-bottom:9px}
.beh-btn{padding:6px 4px; border:1px solid var(--line); border-radius:var(--rs);
  font-size:10px; color:var(--ink3); text-align:center; line-height:1.2; transition:.13s}
.beh-btn:hover{border-color:var(--line2); color:var(--ink2)}
.beh-btn.on{border-color:var(--ach); color:var(--ink); background:var(--raise)}
.train-row{display:flex; gap:6px}
.primary.sm,.ghost.sm{padding:6px 10px; font-size:11px; border-radius:var(--rs)}
.primary.sm{flex:1}
.primary:disabled{opacity:.4; cursor:not-allowed}
.seg{display:inline-flex; border:1px solid var(--line); border-radius:var(--rs); overflow:hidden}
.seg button{padding:3px 8px; font-size:10px; color:var(--ink3); transition:.13s}
.seg button.on{background:var(--raise); color:var(--ach)}
.seg button:disabled{opacity:.35; cursor:not-allowed}

/* language picker */
.lang{background:var(--panel2); color:var(--ink2); border:1px solid var(--line2);
  border-radius:var(--rs); padding:6px 8px; font:inherit; font-size:12px; cursor:pointer}
.lang:hover{border-color:var(--ach)}
.boot-top{display:flex; justify-content:space-between; align-items:center; gap:14px}
.k-body{border-left-color:var(--dop)} .k-body .k{background:var(--dop)}
.ex-card code{font-family:var(--fm); font-size:11.5px; color:var(--ach)}

/* ---------- responsive ---------- */

/* responding rows carry their class under the name */
.resp{grid-template-columns:1fr 62px 24px; align-items:center}
.r-name{display:flex; flex-direction:column; line-height:1.25; white-space:normal}
.r-name i{font-style:normal; font-size:9.5px; color:var(--ink3); letter-spacing:.03em}

/* legend sits inside the viewport, like a scope overlay */
.legend{
  position:absolute; right:14px; bottom:12px; display:flex; flex-direction:column; gap:4px;
  padding:9px 11px; background:rgba(10,16,19,.72); border:1px solid var(--line);
  border-radius:var(--rs); backdrop-filter:blur(5px); pointer-events:none; margin:0;
}
.transport{flex-wrap:nowrap; gap:26px}
.transport .slider{flex:none}

/* inspector actions */
.ins-go{
  display:block; width:100%; margin-top:11px; padding:7px 9px; border-radius:var(--rs);
  background:var(--ach); color:#150E03; font-size:11.5px; font-weight:600; text-align:center;
  pointer-events:auto; transition:.14s;
}
.ins-go:hover{background:var(--hot)}
.ins-link{
  display:block; margin-top:7px; font-family:var(--fm); font-size:10.5px;
  color:var(--ink3); text-decoration:none; pointer-events:auto;
}
.ins-link:hover{color:var(--ach)}
#inspect.show{pointer-events:auto}

/* ---------- responsive ---------- */

/* ---------- info affordance ---------- */
.info{
  width:15px; height:15px; flex:none; border-radius:50%; border:1px solid var(--line2);
  font-family:var(--fm); font-size:9.5px; line-height:1; color:var(--ink3);
  display:inline-grid; place-items:center; margin-left:5px; vertical-align:middle;
  transition:.14s; padding:0;
}
.info:hover{border-color:var(--ach); color:var(--ach)}
.info.on{border-color:var(--ach); background:var(--ach); color:#150E03}
.rail-title{gap:0}
.rail-title > span:first-child{display:inline}
.well-info{position:absolute; right:14px; top:14px}
.well-info .info{width:22px; height:22px; font-size:12px; background:rgba(10,16,19,.8); backdrop-filter:blur(5px)}
.tiny .info{margin:0 6px 0 0}
.transport > .info{width:18px; height:18px; font-size:11px; margin-left:0}
#infoPop{
  position:fixed; z-index:70; width:min(330px, calc(100vw - 16px));
  background:var(--panel2); border:1px solid var(--line2); border-radius:var(--r);
  padding:13px 15px; box-shadow:0 14px 34px rgba(0,0,0,.55);
  display:none;
}
#infoPop.open{display:block}
#infoPop h4{font-family:var(--fd); font-size:13.5px; font-weight:600; margin:0 0 6px; color:var(--ink)}
#infoPop p{margin:0; font-size:12.2px; line-height:1.5; color:var(--ink2)}

/* the body simulator gets more room */
:root{--railR:340px}
#flywell{height:250px}

/* ---------- anatomical region labels ---------- */
.regions{position:absolute; inset:0; pointer-events:none; opacity:0; transition:opacity .25s}
.regions.on{opacity:1}
.reg{
  position:absolute; left:0; top:0; margin:-9px 0 0 0;
  font-family:var(--fm); font-size:9.5px; letter-spacing:.05em; white-space:nowrap;
  color:var(--ink2); background:rgba(9,15,18,.74); border:1px solid var(--line);
  border-radius:3px; padding:2px 6px; transform-origin:0 0; opacity:0;
  transition:opacity .2s;
}
.reg::before{
  content:''; position:absolute; left:-4px; top:50%; width:4px; height:4px; margin-top:-2px;
  border-radius:50%; background:var(--ach);
}

/* ---------- viewport tools ---------- */
.well-tools{position:absolute; right:14px; top:14px; display:flex; flex-direction:column; gap:6px}
.tool{
  width:22px; height:22px; display:grid; place-items:center; border-radius:var(--rs);
  border:1px solid var(--line2); color:var(--ink3);
  background:rgba(10,16,19,.8); backdrop-filter:blur(5px); transition:.14s;
}
.tool:hover{border-color:var(--ach); color:var(--ach)}
.tool.on{border-color:var(--ach); color:#150E03; background:var(--ach)}
.tool.ok{border-color:var(--dop); color:var(--dop); width:auto; padding:0 8px; font-size:10px}
.well-tools .info{margin-left:0}

/* ---------- responsive (must stay last) ---------- */
@media (max-width:1180px){
  :root{--rail:214px; --railR:256px}
  .top-stats span:nth-child(4){display:none}
}

@media (max-width:900px){
  /* stack naturally and let the page scroll, instead of fitting a fixed grid */
  body{display:block; overflow:auto; height:auto; min-height:100%}
  main{grid-template-columns:minmax(0,1fr); grid-template-rows:auto 54vh auto}
  .top{padding:9px 13px; gap:12px}
  .top-stats{display:none}
  .brand p{display:none}

  /* the stimulus library becomes one horizontally scrolling strip of chips */
  .rail.left{border-right:0; border-bottom:1px solid var(--line); padding:0; overflow:visible}
  .rail.left > .rail-title{display:none}
  #library{
    display:flex; align-items:center; gap:7px; min-width:0; max-width:100%;
    overflow-x:auto; overflow-y:hidden; padding:10px 13px;
    scrollbar-width:none; -webkit-overflow-scrolling:touch;
  }
  #library::-webkit-scrollbar{display:none}
  .lib-head{
    flex:none; border-top:0; margin:0; padding:0 0 0 9px;
    border-left:1px solid var(--line); display:flex; align-items:center; height:22px;
  }
  .lib-head:first-child{border-left:0; padding-left:0}
  .preset{
    flex:none; width:auto; border-left:0; border:1px solid var(--line2); border-radius:999px;
    padding:7px 13px; gap:7px; white-space:nowrap;
  }
  .preset.on{border-color:var(--ach); background:var(--raise)}

  .well-wrap{min-height:280px}
  .legend{
    top:10px; right:10px; bottom:auto; left:10px;
    flex-direction:row; flex-wrap:wrap; gap:4px 11px; padding:7px 9px;
  }
  .well-tools{right:10px; top:10px}
  .reg{font-size:9px}
  .well-hint{font-size:9.5px; right:10px; bottom:8px; left:10px; text-align:center; max-width:none}
  #inspect{right:10px; top:auto; bottom:34px; width:min(214px,calc(100% - 20px))}

  .rail{overflow:visible}
  .rail.right{border-left:0; border-top:1px solid var(--line); display:block; padding:0}
  .centre{grid-template-rows:auto auto}
  #chanBody{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
  #flywell{height:230px}
  .panel.grow{overflow:visible}
  .resp-wrap{overflow:visible; max-height:none}
  .transport{flex-wrap:wrap; gap:14px 20px; padding:12px 13px}
  .slider input{width:96px}
  .ex-body{padding:20px 16px}
}

@media (max-width:420px){
  .legend .leg:nth-child(n+5){display:none}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important; transition:none !important}
}