/* stilts — styles.css */
:root{
  --bg:#f5f2ec; --panel:#ffffff; --ink:#1c2230; --mute:#5d6675; --line:#dcd6ca;
  --accent:#1d6fb8; --warm:#c0452f; --good:#1f8a45; --kbd:#eee9e0;
  --shadow:0 1px 2px rgba(20,24,34,.08),0 8px 24px rgba(20,24,34,.06);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#11141b; --panel:#171c26; --ink:#e8ecf4; --mute:#9aa4b6; --line:#2a3140;
    --accent:#5aa9e8; --warm:#e87a63; --good:#54d07a; --kbd:#232a36;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 28px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#11141b; --panel:#171c26; --ink:#e8ecf4; --mute:#9aa4b6; --line:#2a3140;
  --accent:#5aa9e8; --warm:#e87a63; --good:#54d07a; --kbd:#232a36;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 28px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink); font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-text-size-adjust:100%;
}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:var(--panel);padding:8px;z-index:9;border-radius:6px}
.top{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:14px 20px;border-bottom:1px solid var(--line);background:var(--panel);
  position:sticky;top:0;z-index:5;
}
h1{font-size:20px;margin:0;letter-spacing:.06em;text-transform:uppercase;font-weight:700}
h2{font-size:19px;margin:22px 0 8px}
h3{font-size:15px;margin:26px 0 6px;letter-spacing:.02em}
.tabs{display:flex;gap:6px;margin-left:auto}
.tab{
  font:inherit;font-size:13px;padding:6px 14px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line);background:transparent;color:var(--mute);
}
.tab[aria-selected="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
main{max-width:1060px;margin:0 auto;padding:16px 20px 56px}
.panel[hidden]{display:none!important}
.stagewrap{position:relative;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);background:#0d1017}
#scene{display:block;width:100%;height:clamp(320px,52vh,560px)}
.hud{
  position:absolute;left:0;right:0;top:0;display:flex;gap:18px;flex-wrap:wrap;
  padding:10px 14px;background:linear-gradient(rgba(10,12,18,.55),rgba(10,12,18,0));color:#fff;
  font-variant-numeric:tabular-nums;pointer-events:none;
}
.hud-item{display:flex;align-items:baseline;gap:5px}
.hud-item b{font-size:18px;font-weight:700}
.hud-item i{font-style:normal;font-size:11px;opacity:.8;letter-spacing:.04em;text-transform:uppercase}
.banner{
  position:absolute;left:50%;bottom:44px;transform:translateX(-50%);
  background:rgba(12,14,20,.72);color:#fff;padding:8px 16px;border-radius:999px;font-size:13px;
  pointer-events:none;text-align:center;max-width:92%;
}
.banner[hidden]{display:none!important}
.leanpad{display:flex;gap:10px;margin:10px 0 0}
.lean{flex:1 1 0;min-height:52px;font-size:16px;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.lean.on{outline:2px solid var(--good);outline-offset:1px}
.controls{display:flex;gap:18px;flex-wrap:wrap;margin:14px 0 6px}
.ctl{display:flex;flex-direction:column;gap:4px;min-width:200px;flex:1 1 200px}
.ctl label{font-size:12px;color:var(--mute);letter-spacing:.03em}
.ctl label span{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.ctl.buttons{flex-direction:row;align-items:flex-end;gap:8px;flex:0 0 auto}
input[type=range]{width:100%;accent-color:var(--accent)}
select,button{font:inherit;font-size:13px;padding:7px 12px;border-radius:8px;border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer}
button:hover{border-color:var(--accent)}
.readout{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:8px;margin-top:14px;
}
.readout div{
  background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px 11px;
  display:flex;justify-content:space-between;align-items:baseline;gap:10px;
}
.readout span{font-size:11.5px;color:var(--mute);flex:1 1 auto}
.readout b{font-variant-numeric:tabular-nums;font-size:14px;white-space:nowrap}
.note,.cap{font-size:12.5px;color:var(--mute);margin:8px 0 0}
.cap b{color:var(--ink);font-variant-numeric:tabular-nums}
p{margin:10px 0}
blockquote{
  margin:10px 0;padding:10px 16px;border-left:3px solid var(--warm);
  background:var(--panel);border-radius:0 8px 8px 0;font-size:16px;
}
.eq{display:block;margin:10px 0;padding:10px 14px;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13.5px;overflow-x:auto}
.fig{display:block;width:100%;height:clamp(250px,36vh,360px);background:var(--panel);
  border:1px solid var(--line);border-radius:10px;margin-top:8px}
.tbl{width:100%;border-collapse:collapse;margin-top:10px;font-size:13px;display:block;overflow-x:auto}
.tbl caption{caption-side:top;text-align:left;font-size:12.5px;color:var(--mute);padding-bottom:6px}
.tbl th,.tbl td{border:1px solid var(--line);padding:5px 9px;text-align:left;vertical-align:top}
.tbl th{background:var(--panel);font-weight:600}
.tbl td{font-variant-numeric:tabular-nums}
.calc{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:14px;align-items:end;margin-top:8px}
.calcout{
  grid-column:1/-1;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px;
  font-size:13.5px;line-height:1.65;
}
.calcout b{font-variant-numeric:tabular-nums}
.verdict-ok{color:var(--good);font-weight:700}
.verdict-no{color:var(--warm);font-weight:700}
ul.plain{padding-left:18px;margin:8px 0}
ul.plain li{margin:6px 0}
.finding{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--good);
  border-radius:0 10px 10px 0;padding:12px 16px}
.finding b{color:var(--ink)}
kbd{background:var(--kbd);color:#1c2230;border:1px solid var(--line);border-bottom-width:2px;
  border-radius:5px;padding:1px 6px;font:12px ui-monospace,Menlo,Consolas,monospace}
code{font:12.5px ui-monospace,Menlo,Consolas,monospace;background:var(--kbd);padding:1px 5px;border-radius:4px}
.foot{border-top:1px solid var(--line);padding:16px 20px;color:var(--mute);font-size:12.5px;text-align:center}
@media (max-width:620px){
  .hud{gap:12px}.hud-item b{font-size:15px}
  .ctl{min-width:150px}
}