#npx-calc{
  --ink:#0f1b2d;--body:#43526b;--mute:#6b7891;--line:#e2e6ee;
  --mist:#f5f7fb;--blue:#1f6feb;--blue-deep:#0b4fc4;
  --gold:#c8892a;--teal:#118a7e;--purple:#7b3fe4;--paper:#fff;
  --shadow:0 1px 2px rgba(15,27,45,.04),0 12px 32px rgba(15,27,45,.07);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  color:var(--body);max-width:820px;margin:0 auto;-webkit-font-smoothing:antialiased;
}
#npx-calc *{box-sizing:border-box;}

/* header */
#npx-calc .hd{
  position:relative;border-radius:14px 14px 0 0;padding:1.9rem 1.9rem 1.7rem;
  background:radial-gradient(120% 140% at 100% 0%,rgba(31,111,235,.12),transparent 55%),
    radial-gradient(120% 140% at 0% 100%,rgba(17,138,126,.10),transparent 50%),
    linear-gradient(180deg,#0f1b2d,#16273f);
  color:#eaf0fb;overflow:hidden;
}
#npx-calc .hd:before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:30px 30px;mask:radial-gradient(120% 90% at 85% 10%,#000,transparent 70%);
  opacity:.5;pointer-events:none;
}
#npx-calc .eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;font-size:.7rem;font-weight:700;
  letter-spacing:.15em;text-transform:uppercase;color:#9fc2ff;margin:0 0 .7rem;position:relative;
}
#npx-calc .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(17,138,126,.25);}
#npx-calc .hd h3{font-size:clamp(1.3rem,3.4vw,1.7rem);font-weight:800;letter-spacing:-.02em;color:#fff;margin:0 0 .4rem;line-height:1.15;position:relative;}
#npx-calc .hd p{font-size:.95rem;color:#c3d0e6;margin:0;max-width:52ch;position:relative;}

/* body panel */
#npx-calc .bd{
  background:var(--paper);border:1px solid var(--line);border-top:0;
  border-radius:0 0 14px 14px;padding:1.7rem 1.9rem 1.9rem;box-shadow:var(--shadow);
}

/* controls */
#npx-calc .row{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem;margin-bottom:1.3rem;}
#npx-calc .fld label{
  display:block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--blue-deep);margin:0 0 .45rem;
}
#npx-calc select{
  width:100%;padding:.75rem .9rem;font-size:.95rem;font-family:inherit;color:var(--ink);
  background:var(--mist);border:1.5px solid var(--line);border-radius:10px;cursor:pointer;
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='%230b4fc4' d='M7 10l5 5 5-5z'/></svg>");
  background-repeat:no-repeat;background-position:right .7rem center;background-size:20px;padding-right:2.4rem;
  transition:border-color .15s,box-shadow .15s;
}
#npx-calc select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,111,235,.15);}

/* result */
#npx-calc .result{margin-top:.4rem;min-height:60px;}
#npx-calc .empty{
  display:flex;align-items:center;gap:.7rem;padding:1.1rem 1.2rem;border:1px dashed #c9d6ec;
  border-radius:10px;background:var(--mist);color:var(--mute);font-size:.92rem;
}
#npx-calc .empty svg{flex:none;}

/* summary strip */
#npx-calc .summary{
  display:flex;flex-wrap:wrap;gap:.8rem;margin-bottom:1.2rem;
}
#npx-calc .stat{
  flex:1 1 120px;padding:.85rem 1rem;border-radius:10px;background:var(--mist);border:1px solid var(--line);
}
#npx-calc .stat .k{display:block;font-size:.68rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--mute);margin-bottom:.2rem;}
#npx-calc .stat .v{display:block;font-size:1.35rem;font-weight:800;color:var(--ink);line-height:1.1;letter-spacing:-.01em;}
#npx-calc .stat.direct .v{color:var(--teal);}
#npx-calc .stat.staged .v{color:var(--blue-deep);}

/* route track */
#npx-calc .track-wrap{
  padding:1.4rem 1.2rem;background:var(--paper);border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow);margin-bottom:1.1rem;overflow-x:auto;
}
#npx-calc .track-title{font-size:.82rem;font-weight:700;color:var(--ink);margin:0 0 1rem;letter-spacing:.01em;}
#npx-calc .track{display:flex;align-items:flex-start;gap:0;min-width:min-content;}
#npx-calc .stop{
  position:relative;text-align:center;padding:0 .3rem;min-width:96px;flex:0 0 auto;
  opacity:0;transform:translateY(6px);animation:npxrise .45s cubic-bezier(.2,.7,.3,1) forwards;
}
@keyframes npxrise{to{opacity:1;transform:translateY(0);}}
#npx-calc .node{
  width:34px;height:34px;border-radius:9px;margin:0 auto .6rem;position:relative;z-index:2;
  border:3px solid var(--paper);display:grid;place-items:center;
  font-size:.6rem;font-weight:800;letter-spacing:.02em;color:#fff;line-height:1;
  box-shadow:0 2px 6px rgba(15,27,45,.12);
}
#npx-calc .node small{display:block;font-size:.72rem;font-weight:800;}
#npx-calc .c-src .node small,#npx-calc .c-mid .node small{font-size:.56rem;letter-spacing:0;}
#npx-calc .rail{position:absolute;top:15px;left:50%;width:100%;height:2px;background:var(--line);z-index:1;}
#npx-calc .stop:last-child .rail{display:none;}
#npx-calc .lbl{display:block;font-size:.76rem;font-weight:700;color:var(--ink);line-height:1.22;}
#npx-calc .tag{display:block;font-size:.64rem;color:var(--mute);margin-top:.12rem;font-weight:600;}
#npx-calc .c-src .node{background:linear-gradient(160deg,#d99a3d,#c8892a);}
#npx-calc .c-mid .node{background:linear-gradient(160deg,#3d86f5,#1f6feb);}
#npx-calc .c-step .node{background:linear-gradient(160deg,#8f57ea,#7b3fe4);}
#npx-calc .c-step .tag{color:var(--purple);}
#npx-calc .c-tgt .node{background:linear-gradient(160deg,#17a294,#118a7e);}
#npx-calc .c-tgt .tag{color:var(--teal);}

/* notes */
#npx-calc .note{
  padding:1rem 1.2rem;border-radius:10px;font-size:.9rem;line-height:1.55;margin-bottom:.8rem;
}
#npx-calc .note.info{background:linear-gradient(180deg,#f2f7ff,#eaf1fd);border:1px solid #cfe0fb;color:#234; }
#npx-calc .note.warn{background:linear-gradient(180deg,#fffaf0,#fef6e6);border:1px solid #f0dcae;color:#5c4a24;}
#npx-calc .note b{color:var(--ink);}
#npx-calc .note.warn b{color:#7a5a13;}
#npx-calc .note .t{display:block;font-size:.64rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:.25rem;}
#npx-calc .note.info .t{color:var(--blue-deep);}
#npx-calc .note.warn .t{color:#a9781f;}

/* steps list */
#npx-calc ol.steps{margin:.2rem 0 0;padding:0;counter-reset:s;list-style:none;}
#npx-calc ol.steps li{
  position:relative;padding:.55rem 0 .55rem 2.4rem;border-bottom:1px dashed var(--line);
  font-size:.92rem;color:var(--body);counter-increment:s;
}
#npx-calc ol.steps li:last-child{border-bottom:0;}
#npx-calc ol.steps li:before{
  content:counter(s);position:absolute;left:0;top:.5rem;width:1.5rem;height:1.5rem;border-radius:7px;
  background:var(--ink);color:#fff;font-size:.78rem;font-weight:800;display:grid;place-items:center;
}
#npx-calc ol.steps li b{color:var(--ink);}

/* footer */
#npx-calc .ft{
  margin-top:1.2rem;padding-top:1rem;border-top:1px solid var(--line);
  font-size:.78rem;color:var(--mute);line-height:1.5;
}
#npx-calc .ft a{color:var(--blue-deep);}

@media (max-width:560px){
  #npx-calc .row{grid-template-columns:1fr;}
  #npx-calc .hd,#npx-calc .bd{padding-left:1.3rem;padding-right:1.3rem;}
}
@media (prefers-reduced-motion:reduce){
  #npx-calc .stop{animation:none;opacity:1;transform:none;}
}