/* N&A demo — light catalogue shell, N&A blue primary, dark 3D viewport */
:root{
  --paper:#F6F8FB; --card:#FFFFFF; --ink:#1B2434; --muted:#5C6B80; --line:#DFE6EF;
  --blue:#204999; --blue-d:#183a7d; --green:#7fbf60; --orange:#f3b031;
  --stage:#E9EEF5;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,sans-serif;font-size:15.5px;line-height:1.55;
  display:grid;grid-template-rows:auto 1fr auto;overflow:hidden}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

/* header */
.bar{display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:12px 22px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.mark{width:40px;height:40px;border-radius:6px}
.brand-t{display:flex;flex-direction:column;line-height:1.25}
.brand-t b{font-size:15.5px;font-weight:700}
.brand-t span{font-size:12px;color:var(--muted)}
.demo-chip{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.6px;
  color:var(--blue);background:#e9eefb;border:1px solid #c6d3ef;border-radius:999px;padding:6px 13px;white-space:nowrap}

/* split layout — fills the viewport row exactly, page never scrolls */
.split{display:grid;grid-template-columns:1fr 400px;min-height:0}
.stage-wrap{position:relative;background:var(--stage)}
#stage{width:100%;height:100%;display:block;position:absolute;inset:0}
.stage-hint{position:absolute;left:16px;bottom:12px;font-size:11px;color:#7D8CA1;letter-spacing:.5px}
.stage-badge{position:absolute;left:16px;top:14px;font-size:12px;font-weight:500;color:var(--blue);
  background:rgba(255,255,255,.85);border:1px solid #C6D3EF;border-radius:8px;padding:6px 12px;
  box-shadow:0 2px 10px rgba(27,36,52,.08);backdrop-filter:blur(4px)}

/* config panel — internal scroll only when it must */
.panel{background:var(--card);border-left:1px solid var(--line);padding:16px 22px 20px;
  overflow-y:auto;min-height:0}
.range-eyebrow{font-size:11px;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted);
  font-weight:600;margin:0 0 12px;border-bottom:1px solid var(--line);padding-bottom:10px}
.lbl{display:block;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);
  font-weight:600;margin:12px 0 6px}
.sel{width:100%;font:inherit;font-weight:600;padding:10px 12px;border:1.5px solid var(--line);
  border-radius:9px;background:var(--card);color:var(--ink);cursor:pointer}
.sel:focus{outline:2px solid var(--blue);outline-offset:1px}

.pkgs{display:flex;flex-direction:column;gap:7px}
.pkg-btn{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;
  font:inherit;padding:10px 13px;border:1.5px solid var(--line);border-radius:10px;
  background:var(--card);color:var(--ink);cursor:pointer;transition:border-color .15s,background .15s}
.pkg-btn b{font-size:14px}
.pkg-btn span{font-size:12px;color:var(--muted)}
.pkg-btn.on{border-color:var(--blue);background:#f0f4fc}
.pkg-btn.on b{color:var(--blue)}

.tanks{display:flex;gap:7px}
.tank-btn{flex:1;font:inherit;font-weight:600;padding:9px 0;border:1.5px solid var(--line);
  border-radius:9px;background:var(--card);color:var(--ink);cursor:pointer}
.tank-btn.on{border-color:var(--blue);background:#f0f4fc;color:var(--blue)}
.tank-btn:disabled{opacity:.38;cursor:not-allowed}
.tanks.hidden,.lbl.hidden{display:none}

.partcard{display:flex;justify-content:space-between;align-items:center;margin-top:14px;
  background:var(--blue);border-radius:11px;padding:11px 16px}
.lbl-inline{font-size:10.5px;letter-spacing:1.2px;text-transform:uppercase;color:#bcd0f5;font-weight:600}
.part{font-size:21px;font-weight:600;color:#fff;letter-spacing:.5px}

.spec{width:100%;border-collapse:collapse;margin-top:12px;font-size:13px}
.spec td{padding:5px 2px;border-bottom:1px solid var(--line);vertical-align:top}
.spec td:first-child{color:var(--muted);white-space:nowrap;padding-right:14px}
.spec td:last-child{text-align:right;font-weight:600;font-variant-numeric:tabular-nums}

.features{margin-top:16px}
.features details{border:1px solid var(--line);border-radius:9px;margin-bottom:7px;overflow:hidden}
.features summary{cursor:pointer;font-weight:600;font-size:13.5px;padding:9px 13px;background:#fafbfd;list-style:none;display:flex;justify-content:space-between;align-items:center}
.features summary::after{content:"+";color:var(--muted);font-weight:400}
.features details[open] summary::after{content:"–"}
.features ul{margin:0;padding:8px 13px 11px 27px;font-size:12.5px;color:var(--muted)}
.features li{margin-bottom:3px}

.enq{display:block;text-align:center;font-weight:600;font-size:14px;color:#fff;background:var(--green);
  text-decoration:none;border-radius:10px;padding:11px;margin-top:14px;filter:saturate(.92)}
.enq:hover{filter:saturate(1.05) brightness(.97)}
.enq-note{font-size:11px;color:var(--muted);text-align:center;margin:7px 0 0}

/* single-line footer bar */
.foot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:11px 22px;background:var(--card);border-top:1px solid var(--line);
  font-size:12px;color:var(--muted)}
.foot-pitch{font-size:13px;color:var(--ink)}
.foot-pitch b{color:var(--blue)}
.foot-cta{font-weight:600;color:#fff;background:var(--blue);text-decoration:none;
  border-radius:999px;padding:6px 15px;margin-left:8px;white-space:nowrap}
.foot-cta:hover{background:var(--blue-d)}
.foot a{color:var(--ink)}
.foot .dim a{border-bottom:1px solid var(--line);text-decoration:none}
.dim{opacity:.65;font-size:11px}

:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:4px}

@media(max-width:880px){
  .split{grid-template-columns:1fr;grid-template-rows:42vh 1fr}
  .stage-wrap{height:auto}
  .panel{border-left:none;border-top:1px solid var(--line)}
  .demo-chip{display:none}
  .foot{padding:8px 14px;gap:8px}
  .foot-pitch{font-size:12px}
}
@media(max-width:600px){
  .brand-t b{font-size:14px}
  .dim{display:none}   /* full credit returns on tablet/desktop */
  .foot-pitch{font-size:11.5px}
  .foot-cta{padding:5px 12px;font-size:12px}
  .stage-hint{font-size:10px}
}