:root{
  --bg:#0d1116; --panel:#161c23; --panel-2:#1d242c; --line:#2b343d; --line-2:#3a4650;
  --ink:#dfe7ee; --dim:#8b98a5; --faint:#5d6a77;
  --live:#2ee08a; --hot:#ff5d55; --amber:#ffb648; --accent:#4ea8ff;
  --r:6px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font:16px/1.55 "IBM Plex Sans",system-ui,-apple-system,Segoe UI,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
h1,h2,h3{font-weight:500;margin:0}
h2{font-size:19px}
h3{font-size:14px;color:var(--dim);text-transform:lowercase;letter-spacing:.04em;margin:22px 0 8px}

header{
  display:flex;align-items:center;gap:14px;
  padding:14px 22px;border-bottom:1px solid var(--line);background:var(--panel);
  position:sticky;top:0;z-index:20;
}
header .logo{font-weight:500;letter-spacing:.02em}
header .logo b{color:var(--live);font-weight:500}
#crumb{color:var(--dim);font-size:14px;flex:1}
#crumb a{color:var(--dim);text-decoration:none;border-bottom:1px solid var(--line-2)}
header select{
  background:var(--panel-2);color:var(--ink);border:1px solid var(--line-2);
  border-radius:var(--r);padding:6px 10px;font:inherit;font-size:14px;
}
main{max-width:1180px;margin:0 auto;padding:22px}

/* ------------------------------------------------------------------ menu */
.menu section{margin-bottom:30px}
.menu .sub{color:var(--dim);font-size:14px;margin:4px 0 12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(216px,1fr));gap:12px}
.card{
  display:block;position:relative;text-decoration:none;
  background:var(--panel);border:1px solid var(--line);border-radius:10px;
  padding:14px 16px;transition:border-color .12s,transform .12s;
}
.card:hover{border-color:var(--line-2);transform:translateY(-1px)}
.card .mode{font:12px/1 "IBM Plex Mono",monospace;color:var(--faint);text-transform:uppercase;letter-spacing:.08em}
.card .name{display:block;margin:8px 0 4px;font-size:16px}
.card .meta{display:block;color:var(--dim);font-size:13px}
.card.done{border-color:rgba(46,224,138,.4)}
.card.done .mode{color:var(--live)}
.card.new{border-style:dashed}
.card .edit{
  position:absolute;bottom:12px;right:14px;font-size:12px;color:var(--dim);
  border-bottom:1px solid var(--line-2);cursor:pointer;
}
.card .edit.del{right:56px}

/* ------------------------------------------------------------- play page */
/* The circuit is wide, the table and the controls are tall, so they sit beside
   each other rather than stacking into a scroll. */
.stage{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:22px;align-items:start}
@media (max-width:940px){.stage{grid-template-columns:1fr}}
.stage-r .verdict{margin-top:12px}

.brief{background:var(--panel);border-left:3px solid var(--accent);padding:12px 16px;margin-bottom:16px}
.brief .tag{font:12px/1 "IBM Plex Mono",monospace;color:var(--faint);text-transform:uppercase;letter-spacing:.08em}
.brief p{margin:6px 0 0}
.brief .goal{font-size:17px}
.brief p+p{color:var(--dim);font-size:14px}
.briefTable{margin-top:10px;max-width:420px}

.bank{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.bank-label{font-size:13px;color:var(--dim)}
.bank-gates{display:flex;gap:8px}
.gatebtn{
  background:var(--panel);border:1px solid var(--line-2);border-radius:var(--r);
  padding:4px 10px;cursor:pointer;line-height:0;
}
.gatebtn:hover{border-color:var(--dim)}
.gatebtn.armed{border-color:var(--live);background:rgba(46,224,138,.08)}
.hint{color:var(--amber);font-size:13px;margin-left:auto}

.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:10px;
  padding:14px 10px;margin-bottom:16px;overflow-x:auto;
}
.circuit{width:100%;height:auto;display:block;min-height:120px}

.w{fill:none;stroke:var(--line-2);stroke-width:2}
.w.hi{stroke:var(--live);stroke-width:3}
.w.lo{stroke:var(--line-2)}
.w.hot{stroke:var(--hot);stroke-width:3}
.gbody{fill:var(--panel-2);stroke:var(--ink);stroke-width:1.7;stroke-linejoin:round}
.lamp .bulb{fill:var(--panel-2);stroke:var(--dim);stroke-width:1.5}
.lamp.on .bulb{fill:var(--live);stroke:var(--live)}
.lamp.on.hot .bulb{fill:var(--hot);stroke:var(--hot)}
.lamp .ilabel{fill:var(--ink);font-size:13px;text-anchor:end;font-family:inherit}
.lamp .olabel{fill:var(--ink);font-size:14px;font-family:inherit}
.lamp .pin{fill:var(--faint);font-size:11px;font-family:"IBM Plex Mono",monospace}
.lamp.click{cursor:pointer}
.lamp.click:hover .bulb{stroke:var(--ink)}
.socket rect{fill:none;stroke:var(--faint);stroke-width:1.5;stroke-dasharray:5 4}
.socket .plus{fill:var(--faint);font-size:18px;text-anchor:middle;font-family:inherit}
.socket.click{cursor:pointer}
.socket.click:hover rect{stroke:var(--live)}
.socket.click:hover .gbody{stroke:var(--live)}
.hidden-note{fill:var(--faint);font-size:12px;text-anchor:middle;font-family:inherit}

.belt{position:relative;height:104px;margin-bottom:14px;background:var(--panel);border-radius:10px;overflow:hidden}
.belt .rail{position:absolute;left:0;right:0;top:52px;height:3px;background:var(--line-2)}
.belt .chute{
  position:absolute;right:14px;width:132px;border:1px dashed var(--line-2);border-radius:var(--r);
  font-size:12px;color:var(--dim);display:flex;align-items:center;justify-content:center;
}
.belt .chute.up{top:8px;height:38px}
.belt .chute.down{top:58px;height:38px}
.belt .actor{
  position:absolute;left:-180px;top:18px;width:150px;padding:6px 8px;border-radius:var(--r);
  background:var(--panel-2);border:1px solid var(--line-2);font-size:12px;line-height:1.35;
  text-align:center;transition:left .5s linear,top .42s ease;
}
.belt .actor b{display:block;font-weight:500}
.belt .actor span{color:var(--dim)}
.belt .actor.bad{border-color:var(--hot);background:rgba(255,93,85,.14);color:var(--hot)}
.belt .actor.bad span{color:var(--hot)}
.belt .actor.good{border-color:rgba(46,224,138,.5)}

.controls{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.tally{color:var(--dim);font-size:14px}
.btn{
  background:var(--panel);color:var(--ink);border:1px solid var(--line-2);border-radius:var(--r);
  padding:9px 16px;font:inherit;font-size:15px;cursor:pointer;text-decoration:none;display:inline-block;
}
.btn:hover{border-color:var(--dim)}
.btn.primary{border-color:var(--live);color:var(--live)}
.btn.primary:hover{background:rgba(46,224,138,.1)}
.btn[hidden]{display:none}

.switches{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.switch{
  flex:1;min-width:200px;display:flex;align-items:center;gap:10px;text-align:left;
  background:var(--panel);color:var(--ink);border:1px solid var(--line-2);border-radius:var(--r);
  padding:11px 14px;font:inherit;font-size:15px;cursor:pointer;
}
.switch .dot{width:13px;height:13px;border-radius:50%;border:1px solid var(--dim);flex:none}
.switch.on{border-color:var(--live);color:var(--live)}
.switch.on .dot{background:var(--live);border-color:var(--live)}

.verdict{border-radius:var(--r);padding:11px 15px;margin-bottom:12px;font-size:15px}
.verdict b{font-weight:500}
.verdict.win{background:rgba(46,224,138,.12);border-left:3px solid var(--live)}
.verdict.lose{background:rgba(255,93,85,.12);border-left:3px solid var(--hot)}
.note{color:var(--dim);font-size:13px;margin:6px 0 0}
.exprs{list-style:none;padding:0;margin:10px 0 0;color:var(--dim);font-family:"IBM Plex Mono",monospace;font-size:13px}

.tt{width:100%;border-collapse:collapse;font-family:"IBM Plex Mono",monospace;font-size:13px}
.tt th{
  font-family:"IBM Plex Sans",sans-serif;font-weight:400;font-size:12px;color:var(--dim);
  text-align:center;padding:6px 4px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.tt td{text-align:center;padding:5px 4px;border-bottom:1px solid rgba(43,52,61,.55)}
.tt tr.ok td{background:rgba(46,224,138,.07)}
.tt tr.bad td{background:rgba(255,93,85,.11)}
.got.right{color:var(--live)}
.got.wrong{color:var(--hot)}
.nextbar{display:flex;gap:10px;margin-top:18px}

/* ------------------------------------------------------------------ safe */
.safewrap{display:flex;gap:16px;align-items:flex-start;margin-bottom:16px;flex-wrap:wrap}
.safewrap .safe{
  flex:none;width:132px;background:var(--panel);border:1px solid var(--line);
  border-radius:10px;padding:12px;text-align:center;
}
.safewrap .safe.open{border-color:var(--live)}
.dialword{
  display:block;font:12px/1 "IBM Plex Mono",monospace;color:var(--faint);
  text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px;
}
.dials{display:flex;flex-direction:column;gap:6px;align-items:center}
.dial{
  width:38px;height:38px;border-radius:50%;border:2px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;
  font:16px/1 "IBM Plex Mono",monospace;color:var(--ink);background:var(--panel-2);
}
.safewrap .safe.open .dial{border-color:var(--live);color:var(--live)}
.safetable{flex:1;min-width:230px}
.safe-tt td.cell{cursor:pointer;border-left:1px solid rgba(43,52,61,.55);font-size:15px}
.safe-tt td.cell:hover{background:rgba(78,168,255,.12)}
.safe-tt td.cell.blank{color:var(--faint)}
.safe-tt td.target{
  font-size:15px;color:var(--ink);border-left:1px solid var(--line-2);
  background:rgba(255,255,255,.03);
}

/* ---------------------------------------------------------------- editor */
.ed{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;align-items:start}
@media (max-width:900px){.ed{grid-template-columns:1fr}}
.ed .row{display:flex;align-items:center;gap:8px;margin-bottom:7px;flex-wrap:wrap}
.ed .row>label:first-child{width:150px;flex:none;color:var(--dim);font-size:13px}
.ed input[type=text],.ed input:not([type]),.ed input[type=number],.ed select,.ed textarea{
  background:var(--panel);color:var(--ink);border:1px solid var(--line-2);border-radius:var(--r);
  padding:7px 9px;font:inherit;font-size:14px;flex:1;min-width:90px;
}
.ed textarea{font-family:inherit;resize:vertical}
.ed .wide{flex:2;font-family:"IBM Plex Mono",monospace}
.ed .mini{
  background:none;border:1px solid var(--line-2);color:var(--dim);border-radius:var(--r);
  padding:5px 10px;font:inherit;font-size:13px;cursor:pointer;flex:none;
}
.ed .mini:hover{color:var(--ink);border-color:var(--dim)}
.ed .chks{display:flex;gap:12px;flex-wrap:wrap;flex:1}
.ed .chk{display:flex;align-items:center;gap:5px;color:var(--dim);font-size:13px;width:auto;flex:none}
.ed-side{position:sticky;top:76px}
.ed-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.ed-actions .btn{font-size:14px;padding:7px 12px}
.checks{list-style:none;padding:0;margin:0;font-size:13px}
.checks li{padding:6px 10px;border-left:3px solid var(--line-2);margin-bottom:5px;background:var(--panel)}
.checks li.bad{border-color:var(--hot);color:var(--hot)}
.checks li.warn{border-color:var(--amber);color:var(--amber)}
.checks li.good{border-color:var(--live);color:var(--live)}
.checks li.note{color:var(--dim);font-family:"IBM Plex Mono",monospace}
.ed-play{margin-top:18px}

footer{
  max-width:1180px;margin:0 auto;padding:26px 22px 40px;color:var(--faint);font-size:13px;
  display:flex;gap:16px;flex-wrap:wrap;
}
footer a{color:var(--dim);text-decoration:none;border-bottom:1px solid var(--line)}