:root{
  --bg: #14181c;
  --panel: #1b2127;
  --panel-2: #20272e;
  --hairline: #2c353d;
  --hairline-2: #384149;
  --ink: #e9edf0;
  --ink-muted: #8b98a3;
  --ink-faint: #576068;
  --zinc: #9fb7cc;
  --zinc-dim: #5d7488;
  --molten: #ff7a30;
  --molten-dim: #7a3d1c;
  --pass: #6fbf8b;
  --fail: #e0616b;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(159,183,204,0.07), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(255,122,48,0.05), transparent 55%),
    var(--bg);
  color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
.wrap{max-width:1180px;margin:0 auto;padding:28px 20px 80px;}

/* ---- header: mill-certificate style ---- */
header{
  border:1px solid var(--hairline-2);
  border-radius:4px;
  background:repeating-linear-gradient(135deg, rgba(159,183,204,0.02) 0 2px, transparent 2px 8px), var(--panel);
  padding:22px 26px;
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:22px;
}
.brand-eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:.18em;
  color:var(--zinc-dim);
  text-transform:uppercase;
  margin-bottom:6px;
}
h1{
  font-family:'Archivo Black', sans-serif;
  font-size:clamp(24px,3.4vw,34px);
  line-height:1.05;
  margin:0;
  letter-spacing:-0.01em;
}
h1 span{color:var(--molten);}
.ref-tags{
  display:flex; gap:8px; flex-wrap:wrap;
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
}
.ref-tag{
  border:1px solid var(--hairline-2);
  border-radius:2px;
  padding:5px 9px;
  color:var(--ink-muted);
  white-space:nowrap;
}

/* ---- layout ---- */
.grid{
  display:grid;
  grid-template-columns: 1.05fr 1fr;
  gap:20px;
}
@media (max-width: 880px){ .grid{grid-template-columns:1fr;} }

.panel{
  border:1px solid var(--hairline);
  border-radius:4px;
  background:var(--panel);
  padding:22px;
}
.panel-title{
  font-family:'Barlow Condensed', sans-serif;
  font-weight:700;
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--zinc);
  display:flex;
  align-items:center;
  gap:10px;
  margin:0 0 18px 0;
}
.panel-title::after{
  content:'';
  flex:1;
  height:1px;
  background:var(--hairline-2);
}
.step-no{
  font-family:'IBM Plex Mono',monospace;
  color:var(--bg);
  background:var(--zinc);
  width:18px;height:18px;
  border-radius:2px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:11px;
  font-weight:600;
}

label{
  display:block;
  font-size:12px;
  color:var(--ink-muted);
  margin-bottom:6px;
  font-weight:500;
}
.field{margin-bottom:18px;}
select, input[type=number]{
  width:100%;
  background:var(--panel-2);
  border:1px solid var(--hairline-2);
  color:var(--ink);
  font-family:'IBM Plex Mono', monospace;
  font-size:14px;
  padding:11px 12px;
  border-radius:3px;
  outline:none;
  transition:border-color .15s ease, background .15s ease;
  appearance:none;
  -webkit-appearance:none;
}
select{
  background-image:linear-gradient(45deg, transparent 50%, var(--zinc) 50%), linear-gradient(135deg, var(--zinc) 50%, transparent 50%);
  background-position: calc(100% - 18px) center, calc(100% - 13px) center;
  background-size:5px 5px, 5px 5px;
  background-repeat:no-repeat;
}
select:focus, input:focus{
  border-color:var(--molten);
  background-color:#232a31;
}
.hint{font-size:11px;color:var(--ink-faint);margin-top:6px;line-height:1.5;}
.unit-suffix{position:relative;}
.unit-suffix span{
  position:absolute; right:12px; top:50%; transform:translateY(-50%);
  font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--ink-faint);
  pointer-events:none;
}

fieldset{border:none;padding:0;margin:0 0 20px 0;}
legend{padding:0;}

.env-desc{
  font-size:12px;
  color:var(--ink-muted);
  background:var(--panel-2);
  border:1px solid var(--hairline);
  border-left:2px solid var(--zinc-dim);
  border-radius:2px;
  padding:10px 12px;
  line-height:1.55;
  margin-top:6px;
}
.env-desc b{color:var(--ink);}

/* ---- result: riveted spec plate ---- */
.plate-wrap{display:flex; flex-direction:column; gap:16px;}
.plate{
  position:relative;
  border-radius:6px;
  padding:26px 28px 22px;
  background:
    linear-gradient(160deg, #2a323a 0%, #1d2329 55%, #171c21 100%);
  border:1px solid var(--hairline-2);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04), 0 8px 24px rgba(0,0,0,0.35);
  overflow:hidden;
}
.plate::before{
  content:'';
  position:absolute; inset:0;
  background-image: repeating-linear-gradient(115deg, rgba(255,255,255,0.015) 0 1px, transparent 1px 5px);
  pointer-events:none;
}
.rivet{
  position:absolute; width:8px; height:8px; border-radius:50%;
  background:radial-gradient(circle at 35% 30%, #a9b8c2, #4b555e 70%, #2b323a);
  box-shadow:0 1px 2px rgba(0,0,0,0.6);
}
.rivet.tl{top:12px;left:12px;} .rivet.tr{top:12px;right:12px;}
.rivet.bl{bottom:12px;left:12px;} .rivet.br{bottom:12px;right:12px;}

.plate-label{
  font-family:'IBM Plex Mono',monospace;
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--zinc-dim);
  margin-bottom:10px;
}
.plate-value-row{
  display:flex;
  align-items:baseline;
  gap:12px;
  flex-wrap:wrap;
}
.plate-value{
  font-family:'Archivo Black', sans-serif;
  font-size:clamp(40px,7vw,58px);
  line-height:1;
  color:var(--ink);
  letter-spacing:-0.01em;
}
.plate-unit{
  font-family:'Barlow Condensed',sans-serif;
  font-size:20px;
  color:var(--zinc);
  font-weight:600;
}
.plate-sub{
  font-size:12.5px;
  color:var(--ink-muted);
  margin-top:8px;
  font-family:'IBM Plex Mono',monospace;
}
.plate-sub b{color:var(--ink);}
.na-note{
  font-size:13px;
  color:var(--fail);
  font-family:'IBM Plex Mono',monospace;
  line-height:1.6;
}

.compare-row{
  margin-top:16px;
  padding-top:16px;
  border-top:1px dashed var(--hairline-2);
}
.status-chip{
  display:inline-flex; align-items:center; gap:7px;
  font-family:'IBM Plex Mono',monospace;
  font-size:12px; font-weight:600;
  padding:6px 11px;
  border-radius:20px;
  letter-spacing:.03em;
}
.status-chip.pass{background:rgba(111,191,139,0.12); color:var(--pass); border:1px solid rgba(111,191,139,0.35);}
.status-chip.fail{background:rgba(224,97,107,0.12); color:var(--fail); border:1px solid rgba(224,97,107,0.35);}
.status-dot{width:7px;height:7px;border-radius:50%;background:currentColor;}

/* ---- service life panel ---- */
.life-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
  margin-top:4px;
}
.life-card{
  background:var(--panel-2);
  border:1px solid var(--hairline);
  border-radius:3px;
  padding:14px 14px;
}
.life-card .lbl{font-size:10.5px; text-transform:uppercase; letter-spacing:.1em; color:var(--ink-faint); font-family:'IBM Plex Mono',monospace;}
.life-card .val{font-family:'IBM Plex Mono',monospace; font-size:20px; color:var(--zinc); margin-top:6px; font-weight:600;}
.life-card .val small{font-size:11px;color:var(--ink-faint); font-weight:400;}

/* ---- reference table (collapsed) ---- */
details{
  margin-top:22px;
  border:1px solid var(--hairline);
  border-radius:4px;
  background:var(--panel);
  overflow:hidden;
}
summary{
  cursor:pointer;
  padding:16px 22px;
  font-family:'Barlow Condensed',sans-serif;
  font-weight:600;
  letter-spacing:.06em;
  text-transform:uppercase;
  font-size:13px;
  color:var(--zinc);
  list-style:none;
  display:flex; align-items:center; justify-content:space-between;
}
summary::-webkit-details-marker{display:none;}
summary::after{content:'+'; font-family:'IBM Plex Mono',monospace; font-size:16px; color:var(--ink-faint);}
details[open] summary::after{content:'–';}
.table-body{padding:0 22px 22px;}
table{width:100%; border-collapse:collapse; font-size:12.5px;}
th,td{
  text-align:left; padding:8px 10px;
  border-bottom:1px solid var(--hairline);
  font-family:'IBM Plex Mono',monospace;
  white-space:nowrap;
  transition: background .25s ease, color .25s ease, box-shadow .25s ease;
}
th{color:var(--ink-faint); font-weight:500; font-size:11px; text-transform:uppercase; letter-spacing:.04em;}
tr.hl td{color:var(--molten); font-weight:600;}
td.dim{color:var(--ink-faint);}

th.col-active{color:var(--molten);}
tr.row-active td{background:rgba(255,122,48,0.07);}
tr.row-active td:first-child{color:var(--ink); font-weight:600; box-shadow:inset 3px 0 0 var(--molten);}
td.cell-active{
  background:var(--molten) !important;
  color:#14181c !important;
  font-weight:700;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.25);
  border-radius:2px;
}

.legend-row{
  display:flex; flex-wrap:wrap; gap:16px;
  margin-top:14px;
  font-size:11px;
  color:var(--ink-muted);
  font-family:'IBM Plex Mono',monospace;
}
.legend-item{display:inline-flex; align-items:center; gap:7px;}
.swatch{width:14px; height:14px; border-radius:3px; display:inline-block; flex:none;}
.swatch-solid{background:var(--molten);}
.swatch-outline{background:transparent; box-shadow:inset 0 0 0 1px var(--molten);}
.swatch-bar{background:rgba(255,122,48,0.15); box-shadow:inset 3px 0 0 var(--molten);}

footer{
  margin-top:30px;
  font-size:11px;
  color:var(--ink-faint);
  line-height:1.7;
  font-family:'IBM Plex Mono',monospace;
}