/* JINI build guide — same tokens as the homepage, JINI accent only. */
:root{
  --bg:#000000;
  --fg:#f4f6f8;
  --muted:#9aa1ab;
  --muted-dim:#5f6670;
  --faint:#3d434b;
  --line:rgba(255,255,255,.13);
  --line-strong:rgba(255,255,255,.30);
  --field:rgba(255,255,255,.045);
  --accent:#8fe0ad;
  --accent-dim:rgba(143,224,173,.55);
  --danger:#ff7a6d;
  --warn:#ffc46b;
  --petg:#b9c2cc;
  --tpu:#8fe0ad;
  --font:"Inter","SF Pro Text",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.75,.3,1);
  --gutter:clamp(20px,5vw,72px);
  --rail:236px;
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font);
  font-weight:300;
  font-size:16px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
::selection{background:rgba(143,255,190,.3)}
a{color:inherit;text-decoration:none}
a.link{border-bottom:1px solid var(--line-strong);transition:border-color .3s var(--ease),color .3s var(--ease)}
a.link:hover{color:var(--accent);border-color:var(--accent-dim)}
:focus-visible{outline:2px solid rgba(143,224,173,.85);outline-offset:3px;border-radius:2px}

/* ── Masthead ─────────────────────────────────────────── */
header.top{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;gap:18px;
  padding:14px var(--gutter);
  background:rgba(0,0,0,.78);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.brand{
  font-size:11px;letter-spacing:.34em;text-indent:.34em;
  font-weight:400;color:var(--muted);white-space:nowrap;
}
.brand b{color:var(--fg);font-weight:500}
.top .rev{
  margin-left:auto;font-size:11px;letter-spacing:.18em;
  color:var(--muted-dim);white-space:nowrap;
}
.progress-wrap{flex:1;display:flex;align-items:center;gap:12px;min-width:80px;max-width:340px}
.progress{
  position:relative;flex:1;height:2px;
  background:rgba(255,255,255,.12);border-radius:2px;overflow:hidden;
}
.progress i{
  position:absolute;inset:0 auto 0 0;width:0%;
  background:var(--accent);box-shadow:0 0 10px var(--accent-dim);
  transition:width .45s var(--ease);
}
.progress-n{font-size:11px;letter-spacing:.14em;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}

/* ── Hero ─────────────────────────────────────────────── */
.hero{padding:clamp(56px,9vw,120px) var(--gutter) clamp(30px,5vw,56px);max-width:1500px;margin:0 auto}
.eyebrow{font-size:11px;letter-spacing:.32em;text-indent:.32em;color:var(--accent);margin:0 0 20px}
h1{
  margin:0;font-weight:200;line-height:1.02;letter-spacing:-.02em;
  font-size:clamp(40px,7vw,86px);
}
h1 span{display:block;color:var(--muted-dim)}
.lede{margin:26px 0 0;max-width:62ch;font-size:clamp(16px,1.6vw,19px);color:var(--muted);font-weight:300}
.facts{
  display:flex;flex-wrap:wrap;gap:0;margin-top:40px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.fact{flex:1 1 150px;padding:16px 22px 16px 0;min-width:130px}
.fact dt{font-size:10px;letter-spacing:.2em;color:var(--muted-dim);text-transform:uppercase;margin:0 0 6px}
.fact dd{margin:0;font-size:18px;font-weight:300;font-variant-numeric:tabular-nums}
.fact dd small{color:var(--muted);font-size:13px}

/* ── Layout ───────────────────────────────────────────── */
.shell{display:grid;grid-template-columns:var(--rail) minmax(0,1fr);gap:clamp(24px,4vw,64px);
  max-width:1500px;margin:0 auto;padding:0 var(--gutter) 140px}
nav.rail{position:sticky;top:96px;align-self:start;max-height:calc(100vh - 120px);overflow-y:auto;
  padding-bottom:20px;scrollbar-width:thin}
nav.rail h2{font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted-dim);
  margin:0 0 14px;font-weight:400}
nav.rail ol{list-style:none;margin:0 0 26px;padding:0}
nav.rail li{margin:0}
nav.rail a{
  display:flex;gap:10px;padding:5px 0;font-size:13px;color:var(--muted);
  border-left:1px solid transparent;padding-left:12px;margin-left:-1px;
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
nav.rail ol{border-left:1px solid var(--line)}
nav.rail a:hover{color:var(--fg)}
nav.rail a.on{color:var(--accent);border-left-color:var(--accent)}
nav.rail a.done .n::after{content:"✓";position:absolute;inset:0;color:var(--accent);background:var(--bg)}
nav.rail .n{position:relative;color:var(--faint);font-variant-numeric:tabular-nums;min-width:1.4em}
nav.rail a.on .n{color:var(--accent)}

/* ── Sections ─────────────────────────────────────────── */
section{scroll-margin-top:92px;padding:clamp(34px,5vw,60px) 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:0}
.sec-head{display:flex;align-items:flex-start;gap:18px}
.sec-n{
  font-size:11px;letter-spacing:.2em;color:var(--accent);
  padding-top:.7em;min-width:3.4em;font-variant-numeric:tabular-nums;
}
h2.sec{margin:0;font-weight:200;font-size:clamp(25px,3.4vw,38px);letter-spacing:-.01em;line-height:1.16}
h3{margin:36px 0 12px;font-weight:400;font-size:15px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}
.body{max-width:78ch;margin-left:0}
@media (min-width:900px){.body{margin-left:calc(3.4em + 18px)}}
p{margin:0 0 16px}
.body ul,.body ol{margin:0 0 18px;padding-left:22px}
.body li{margin:0 0 9px}
.body li::marker{color:var(--faint)}
strong{font-weight:500;color:#fff}
code,.mono{font-family:var(--mono);font-size:.88em;color:var(--accent);
  background:var(--field);padding:.12em .42em;border-radius:3px;border:1px solid var(--line)}

/* ── Notes ────────────────────────────────────────────── */
.note{
  margin:22px 0;padding:16px 20px;border-left:2px solid var(--line-strong);
  background:var(--field);border-radius:0 6px 6px 0;font-size:15px;color:var(--muted);
}
.note b{display:block;color:var(--fg);font-weight:500;font-size:11px;
  letter-spacing:.2em;text-transform:uppercase;margin-bottom:7px}
.note p:last-child{margin-bottom:0}
.note.stop{border-left-color:var(--danger)}
.note.stop b{color:var(--danger)}
.note.warn{border-left-color:var(--warn)}
.note.warn b{color:var(--warn)}
.note.ok{border-left-color:var(--accent)}
.note.ok b{color:var(--accent)}

/* ── Tables ───────────────────────────────────────────── */
.tw{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:8px;
  -webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:520px}
th,td{text-align:left;padding:11px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{
  font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted-dim);
  font-weight:400;background:rgba(255,255,255,.03);position:sticky;top:0;backdrop-filter:blur(6px);
}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(255,255,255,.022)}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--muted)}
.pn{font-family:var(--mono);color:var(--accent);font-size:13px}
.tag{display:inline-block;font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  padding:2px 8px;border-radius:99px;border:1px solid var(--line-strong);color:var(--muted);white-space:nowrap}
.tag.petg{color:var(--petg);border-color:rgba(185,194,204,.4)}
.tag.tpu{color:var(--tpu);border-color:rgba(143,224,173,.4)}

/* ── Viewer ───────────────────────────────────────────── */
.viewer{
  position:relative;margin:26px 0;border:1px solid var(--line);border-radius:10px;
  background:radial-gradient(120% 90% at 50% 0%,rgba(143,224,173,.07),transparent 62%),#050706;
  overflow:hidden;
}
.viewer .stage{display:block;width:100%;height:clamp(300px,52vh,520px);touch-action:none;cursor:grab}
.viewer .stage:active{cursor:grabbing}
.viewer .bar{
  position:absolute;left:0;right:0;bottom:0;display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding:12px 14px;background:linear-gradient(transparent,rgba(0,0,0,.72) 40%);
}
.viewer .hint{
  position:absolute;top:12px;left:14px;font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted-dim);pointer-events:none;
}
.btn{
  font:inherit;font-size:12px;letter-spacing:.1em;color:var(--muted);
  background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:99px;
  padding:6px 15px;cursor:pointer;transition:all .25s var(--ease);
}
.btn:hover{color:var(--fg);border-color:var(--line-strong)}
.btn[aria-pressed="true"],.btn.on{color:#04150c;background:var(--accent);border-color:var(--accent);font-weight:500}
.viewer .status{margin-left:auto;font-size:11px;color:var(--muted-dim);letter-spacing:.08em}
.pchips{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0 0}
.pchip{
  font:inherit;font-size:11px;letter-spacing:.06em;color:var(--muted);cursor:pointer;
  background:transparent;border:1px solid var(--line);border-radius:99px;padding:4px 11px;
  transition:all .2s var(--ease);
}
.pchip:hover{color:var(--fg);border-color:var(--line-strong)}
.pchip.on{color:var(--accent);border-color:var(--accent-dim);background:rgba(143,224,173,.1)}
.pchip i{font-style:normal;color:var(--faint);margin-right:6px;font-family:var(--mono)}
.pchip.on i{color:var(--accent)}

/* ── Step checkbox ────────────────────────────────────── */
.done-row{display:flex;align-items:center;gap:12px;margin:30px 0 0;padding-top:20px;border-top:1px solid var(--line)}
.done-row label{display:flex;align-items:center;gap:11px;cursor:pointer;font-size:13px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted-dim);user-select:none;
  transition:color .25s var(--ease)}
.done-row label:hover{color:var(--muted)}
.done-row input{position:absolute;opacity:0;width:0;height:0}
.box{width:17px;height:17px;border:1px solid var(--line-strong);border-radius:3px;display:grid;
  place-items:center;flex:none;transition:all .25s var(--ease)}
.box::after{content:"";width:8px;height:4px;border-left:1.6px solid #04150c;border-bottom:1.6px solid #04150c;
  transform:rotate(-45deg) scale(.4);opacity:0;transition:all .2s var(--ease)}
.done-row input:checked + .box{background:var(--accent);border-color:var(--accent)}
.done-row input:checked + .box::after{opacity:1;transform:rotate(-45deg) scale(1)}
.done-row input:checked ~ .txt{color:var(--accent)}
.done-row input:focus-visible + .box{outline:2px solid var(--accent);outline-offset:3px}
section.complete .sec-n{color:var(--accent)}
section.complete > .sec-head h2.sec{color:var(--muted)}

/* ── Wiring plate ─────────────────────────────────────── */
.plate{background:#fff;border-radius:8px;padding:14px;margin:22px 0;border:1px solid var(--line)}
.plate img{display:block;width:100%;height:auto}
figcaption{font-size:12px;color:var(--muted-dim);margin-top:10px;letter-spacing:.04em}

/* ── Footer ───────────────────────────────────────────── */
footer{border-top:1px solid var(--line);padding:40px var(--gutter) 70px;max-width:1500px;margin:0 auto;
  color:var(--muted-dim);font-size:13px;display:flex;flex-wrap:wrap;gap:20px 40px}
footer a{color:var(--muted)}
footer a:hover{color:var(--accent)}

@media (max-width:899px){
  :root{--rail:0px}
  .shell{grid-template-columns:minmax(0,1fr);padding-bottom:90px}
  nav.rail{position:static;max-height:none;border-bottom:1px solid var(--line);padding-bottom:18px;margin-top:8px}
  nav.rail ol{columns:2;column-gap:20px}
  .sec-head{gap:12px}
  .sec-n{min-width:2.8em}
  header.top{gap:12px;padding:12px var(--gutter)}
  .brand span{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}

@media print{
  header.top,nav.rail,.viewer,.done-row,.pchips,footer .noprint{display:none!important}
  :root{--bg:#fff;--fg:#111;--muted:#444;--muted-dim:#666;--faint:#999;
    --line:#ddd;--line-strong:#bbb;--field:#f6f6f6;--accent:#1b7a46}
  body{background:#fff;color:#111}
  .shell{display:block;padding:0}
  section{break-inside:avoid;border-top:1px solid #ddd}
  h1{font-size:34px}
  .tw{overflow:visible}
  table{min-width:0}
  a.link{border:0;text-decoration:underline}
  code,.mono{background:#f2f2f2;color:#111}
}

/* A long filename in running text must wrap, or it pushes a phone sideways. */
code { overflow-wrap: anywhere; }