:root{
    --bg:#0f1420; --panel:#171e2e; --panel2:#1d2638; --ink:#e8edf6; --muted:#9fb0c8;
    --line:#2a3550; --x:#ff6b6b; --o:#4dabf7; --safe:#34d399; --loss:#f87171;
    --accent:#fbbf24;
  }
  *{box-sizing:border-box}
  body{margin:0;background:var(--bg);color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    line-height:1.5}
  header{padding:18px 22px;border-bottom:1px solid var(--line)}
  h1{font-size:20px;margin:0 0 4px}
  header p{margin:0;color:var(--muted);font-size:13px;max-width:900px}
  .wrap{display:flex;flex-wrap:wrap;gap:18px;padding:18px 22px;align-items:flex-start}
  .panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}
  .col-left{width:300px;flex:0 0 auto}
  .col-net{flex:1 1 560px;min-width:520px}
  h2{font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);
    margin:0 0 12px;font-weight:600}
  /* board */
  .board{position:relative;display:grid;grid-template-columns:repeat(3,84px);
    grid-template-rows:repeat(3,84px);gap:0;justify-content:center;margin:10px auto;
    width:252px;background:var(--panel2);border-radius:10px}
  .gridline{position:absolute;background:var(--line);pointer-events:none;z-index:2}
  .gridline.v{width:3px;top:6px;bottom:6px;border-radius:2px}
  .gridline.h{height:3px;left:6px;right:6px;border-radius:2px}
  .cell{background:transparent;border:none;
    display:flex;align-items:center;justify-content:center;font-size:42px;font-weight:700;
    cursor:pointer;position:relative;transition:background .1s}
  .cell:hover{background:rgba(255,255,255,.04)}
  .cell.x{color:var(--x)} .cell.o{color:var(--o)}
  .cell.filled{cursor:default} .cell.filled:hover{background:transparent}
  .cell .idx{position:absolute;top:4px;left:6px;font-size:10px;font-weight:600;
    color:var(--muted);opacity:.55;z-index:3}
  .cell .prob{position:absolute;bottom:5px;left:0;right:0;text-align:center;font-size:10px;
    font-weight:600;color:var(--muted)}
  .cell .ring{position:absolute;inset:5px;border-radius:7px;pointer-events:none}
  .cell.pick .ring{box-shadow:0 0 0 3px var(--accent) inset}
  .cell.safe .prob{color:var(--safe)} .cell.unsafe .prob{color:var(--loss)}
  .controls{display:flex;flex-direction:column;gap:8px;margin-top:10px}
  .row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
  button{background:var(--accent);color:#1a1300;border:0;border-radius:8px;padding:8px 12px;
    font-weight:650;cursor:pointer;font-size:13px}
  button.ghost{background:var(--panel2);color:var(--ink);border:1px solid var(--line)}
  button:disabled{opacity:.4;cursor:default}
  .status{margin-top:10px;padding:10px;border-radius:8px;background:var(--panel2);
    font-size:13px;min-height:20px}
  .legend{font-size:12px;color:var(--muted);margin-top:8px}
  .pill{display:inline-block;width:11px;height:11px;border-radius:3px;vertical-align:-1px;margin-right:4px}
  label.tog{font-size:12px;color:var(--muted);display:flex;gap:6px;align-items:center;cursor:pointer}
  svg{width:100%;height:auto;display:block}
  .nlabel{fill:var(--muted);font-size:11px}
  .caption{font-size:12px;color:var(--muted);margin-top:6px}
  /* comparison */
  .col-cmp{flex:1 1 360px;min-width:340px}
  .bar{height:26px;border-radius:6px;background:linear-gradient(90deg,#3b82f6,#60a5fa);
    display:flex;align-items:center;padding-left:10px;color:#fff;font-size:12px;font-weight:600;
    white-space:nowrap;min-width:2px}
  .bar.mlp{background:linear-gradient(90deg,#059669,#34d399)}
  .cmprow{margin:10px 0}
  .cmprow .k{font-size:12px;color:var(--muted);margin-bottom:3px;display:flex;justify-content:space-between}
  .note{font-size:12px;color:var(--muted);margin-top:14px;border-top:1px solid var(--line);padding-top:10px}
  code{background:var(--panel2);padding:1px 5px;border-radius:4px;font-size:12px}
  /* quantization table + popover */
  table.q{width:100%;border-collapse:collapse;font-size:12px;margin-top:4px}
  table.q th{color:var(--muted);font-weight:600;text-align:left;padding:5px 4px}
  table.q td{padding:6px 4px;border-top:1px solid var(--line)}
  .fmt{cursor:help;border-bottom:1px dotted var(--muted)}
  .errbadge{font-weight:700;border-radius:5px;padding:1px 7px;font-size:12px}
  #ftip{position:fixed;z-index:50;max-width:300px;background:#0b0f18;border:1px solid var(--line);
    border-radius:10px;padding:11px 12px;font-size:12px;color:var(--ink);
    box-shadow:0 10px 30px rgba(0,0,0,.5);pointer-events:none;opacity:0;transition:opacity .08s;
    line-height:1.45}
  #ftip.on{opacity:1}
  #ftip b{color:var(--accent)}
  .bits{display:flex;gap:3px;margin:8px 0 6px;flex-wrap:wrap}
  .bits span{font-size:10px;font-weight:700;padding:3px 0;border-radius:4px;text-align:center;color:#0b0f18}
  .bits .s{background:#fbbf24;width:24px}
  .bits .e{background:#4dabf7}
  .bits .m{background:#34d399}
  .bits .i{background:#c0c8d8;width:120px}
  .ex{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:11px;color:var(--muted);
    background:var(--panel2);padding:6px 8px;border-radius:6px;margin-top:6px}

:root{--accent:#b3ef72} .col-net{min-width:0;flex:1 1 500px}.col-cmp{min-width:0;flex:1 1 300px;max-width:430px}
header{display:flex;justify-content:space-between;gap:20px;padding:26px 24px}header p{max-width:800px}h1{font-size:26px}
a{color:var(--accent)}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.18em;color:var(--accent);margin-bottom:8px}
select{width:100%;padding:10px;background:var(--panel2);color:var(--ink);border:1px solid var(--line);border-radius:8px}
#brain{width:100%;height:340px;display:block}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stat{background:var(--panel2);padding:12px;border-radius:8px}.stat strong{display:block;font-size:23px}.stat span{font-size:11px;color:var(--muted)}
#readouts{display:grid;grid-template-columns:repeat(9,1fr);gap:4px;margin:15px 0}.output{text-align:center;font-size:11px;color:var(--muted)}.output div{height:64px;display:flex;align-items:end;background:var(--panel2);border-radius:5px;overflow:hidden}.output i{width:100%;background:var(--accent)}
.caption{max-width:720px}td,th{text-align:left;padding:8px 4px;border-bottom:1px solid var(--line);font-size:12px}table{width:100%;border-collapse:collapse}.muted{color:var(--muted)}details{font-size:13px;margin-top:20px}summary{cursor:pointer;color:var(--accent)}#status{min-height:64px}
@media(max-width:640px){header{padding:18px;display:block}header>a{display:inline-block;margin-top:12px}.wrap{padding:12px;gap:12px}.col-left,.col-net,.col-cmp{width:100%;max-width:none;flex:1 1 100%}h1{font-size:23px}#brain{height:260px}}
.cell:disabled{opacity:1;cursor:default}.cell .mark{font-size:42px}