/* ============================================================
   ENTERPRISE — by YP Enterprise Solution Co., Ltd.
   Professional Audio Video for serious projects
   ------------------------------------------------------------
   Design language: technical datasheet.
   Black hero bands, cool-paper document sections, hairline
   rules, mono data labels, red signal accent.
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --ink:#0a0a0b;
  --carbon:#131418;
  --graphite:#1c1e24;
  --steel:#3d3d3d;
  --silver:#949494;
  --signal:#ed1c24;
  --signal-dk:#bf1119;

  --paper:#f4f5f7;
  --paper-2:#eaecef;
  --plate:#ffffff;

  --text-d:#e9eaec;
  --text-l:#15161a;
  --muted-d:#8d9199;
  --muted-l:#5b606b;

  --rule-d:rgba(255,255,255,.14);
  --rule-d-soft:rgba(255,255,255,.07);
  --rule-l:#d9dce1;
  --rule-l-soft:#e7e9ed;

  --ff-display:"Archivo","Arial Black",Arial,sans-serif;
  --ff-body:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --ff-mono:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;

  --maxw:1280px;
  --gut:clamp(20px,4vw,48px);
  --sec:clamp(60px,8vw,112px);
  --hdr:68px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--hdr) + 12px)}
body{
  margin:0;background:var(--paper);color:var(--text-l);
  font-family:var(--ff-body);font-size:16px;line-height:1.62;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;display:block}
a{color:inherit}
button{font:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--ff-display);font-weight:700;line-height:1.04;letter-spacing:-.018em}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ---------- 3. Layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.band{padding:var(--sec) 0}
.band--dark{background:var(--ink);color:var(--text-d)}
.band--carbon{background:var(--carbon);color:var(--text-d)}
.band--paper{background:var(--paper);color:var(--text-l)}
.band--plate{background:var(--plate);color:var(--text-l)}
.band--dark a,.band--carbon a{color:var(--text-d)}

/* ---------- 4. Typography utilities ---------- */
.eyebrow{
  font-family:var(--ff-mono);font-size:11px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--signal);
  margin:0 0 14px;display:block;
}
.eyebrow--muted{color:var(--muted-l)}
.band--dark .eyebrow--muted,.band--carbon .eyebrow--muted{color:var(--muted-d)}

.h-xl{font-size:clamp(34px,6.2vw,74px);font-variation-settings:"wdth" 108}
.h-lg{font-size:clamp(28px,4.2vw,50px);font-variation-settings:"wdth" 105}
.h-md{font-size:clamp(21px,2.4vw,31px);font-variation-settings:"wdth" 103}
.h-sm{font-size:clamp(17px,1.6vw,21px);font-variation-settings:"wdth" 100;letter-spacing:-.008em}
.h-xs{font-family:var(--ff-display);font-size:15px;font-weight:700;letter-spacing:.01em;margin:0 0 8px}

.lede{font-size:clamp(16.5px,1.5vw,20px);line-height:1.62;color:var(--muted-l);max-width:60ch}
.band--dark .lede,.band--carbon .lede{color:#b4b8bf}
.small{font-size:14.5px;line-height:1.6}
.muted{color:var(--muted-l)}
.band--dark .muted,.band--carbon .muted{color:var(--muted-d)}
.mono{font-family:var(--ff-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.sig{color:var(--signal)}

/* section head — a drawing title block */
.sec-head{
  display:grid;grid-template-columns:minmax(0,1fr);gap:16px;
  padding-top:22px;border-top:1px solid var(--rule-l);margin-bottom:44px;
}
.band--dark .sec-head,.band--carbon .sec-head{border-top-color:var(--rule-d)}
.sec-head__idx{font-family:var(--ff-mono);font-size:11px;letter-spacing:.2em;color:var(--muted-l)}
.band--dark .sec-head__idx,.band--carbon .sec-head__idx{color:var(--muted-d)}
@media(min-width:900px){
  .sec-head{grid-template-columns:210px minmax(0,1fr);gap:40px;align-items:start}
}
.sec-head__body{max-width:70ch}

/* ---------- 5. Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(10,10,11,.92);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--rule-d);
}
.site-header__in{display:flex;align-items:center;gap:24px;height:var(--hdr);
  max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;flex:0 0 auto}
.brand__mark{width:17px;height:25px;flex:0 0 auto}
.brand__word{
  font-family:var(--ff-display);font-weight:600;font-size:17px;
  letter-spacing:.30em;color:#fff;line-height:1;white-space:nowrap;
  font-variation-settings:"wdth" 100;
}
.brand__word i{font-style:normal;color:var(--signal)}
.brand__sub{
  display:none;font-family:var(--ff-mono);font-size:9.5px;letter-spacing:.16em;
  color:var(--muted-d);text-transform:uppercase;margin-top:4px;
}
@media(min-width:1100px){.brand__sub{display:block}}

.nav{margin-left:auto;display:none;align-items:center;gap:6px}
@media(min-width:960px){.nav{display:flex}}
.nav a{
  font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:#b7bac0;text-decoration:none;padding:9px 13px;border-radius:2px;
  transition:color .18s,background .18s;
}
.nav a:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav a[aria-current="page"]{color:#fff;box-shadow:inset 0 -2px 0 var(--signal)}
.nav__cta{
  margin-left:10px;background:var(--signal)!important;color:#fff!important;
  padding:10px 17px!important;
}
.nav__cta:hover{background:var(--signal-dk)!important}

.burger{
  margin-left:auto;display:inline-flex;align-items:center;gap:9px;background:none;border:1px solid var(--rule-d);
  color:#fff;padding:9px 13px;border-radius:2px;cursor:pointer;
  font-family:var(--ff-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
}
@media(min-width:960px){.burger{display:none}}
.burger span{display:block;width:15px;height:9px;position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;right:0;height:1.5px;background:#fff;transition:transform .22s;
}
.burger span::before{top:0}.burger span::after{bottom:0}
.burger[aria-expanded="true"] span::before{transform:translateY(3.75px) rotate(45deg)}
.burger[aria-expanded="true"] span::after{transform:translateY(-3.75px) rotate(-45deg)}

.mobile-nav{display:none;background:var(--ink);border-bottom:1px solid var(--rule-d)}
.mobile-nav.is-open{display:block}
@media(min-width:960px){.mobile-nav{display:none!important}}
.mobile-nav a{
  display:block;padding:15px var(--gut);color:#d4d6da;text-decoration:none;
  border-top:1px solid var(--rule-d-soft);font-family:var(--ff-mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
}
.mobile-nav a[aria-current="page"]{color:#fff;border-left:2px solid var(--signal)}

/* ---------- 6. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;cursor:pointer;
  font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.15em;text-transform:uppercase;
  padding:15px 24px;border-radius:2px;border:1px solid transparent;
  transition:background .18s,border-color .18s,color .18s,transform .18s;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--signal);color:#fff!important}
.btn--primary:hover{background:var(--signal-dk)}
.btn--ghost{border-color:var(--rule-d);color:var(--text-d)!important}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.btn--dark{background:var(--ink);color:#fff!important}
.btn--dark:hover{background:var(--steel)}
.btn--line{border-color:var(--rule-l);color:var(--text-l)!important}
.btn--line:hover{border-color:var(--ink);background:rgba(0,0,0,.04)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

/* ---------- 7. Hero ---------- */
.hero{background:var(--ink);color:var(--text-d);position:relative;overflow:hidden;
  padding:clamp(48px,7vw,86px) 0 clamp(44px,6vw,72px)}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(237,28,36,.07),transparent 42%),
    repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0 1px,transparent 1px 84px);
}
.hero__in{position:relative;z-index:1;display:grid;gap:clamp(38px,5vw,60px)}
@media(min-width:1000px){.hero__in{grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);align-items:center}}
.hero h1{font-size:clamp(35px,5.6vw,66px);font-variation-settings:"wdth" 106;letter-spacing:-.025em}
.hero h1 em{font-style:normal;color:var(--signal)}
.hero__lede{margin-top:22px;font-size:clamp(16px,1.4vw,18.5px);color:#b6bac1;max-width:56ch}

.stds{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px;padding-top:24px;border-top:1px solid var(--rule-d)}
.stds li{
  font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:#c6c9cf;border:1px solid var(--rule-d);padding:7px 11px;border-radius:2px;
}

/* page hero (interior pages) */
.phero{background:var(--ink);color:var(--text-d);padding:clamp(46px,6vw,84px) 0 clamp(38px,5vw,64px);
  position:relative;overflow:hidden}
.phero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0 1px,transparent 1px 84px)}
.phero__in{position:relative;z-index:1}
.phero h1{font-size:clamp(31px,4.8vw,58px);font-variation-settings:"wdth" 106;max-width:19ch}
.phero .lede{margin-top:20px;color:#b6bac1}
.crumb{font-family:var(--ff-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted-d);margin-bottom:18px}
.crumb a{text-decoration:none;color:var(--muted-d)}
.crumb a:hover{color:#fff}

/* ---------- 8. Room plan (signature element) ---------- */
.plan{border:1px solid var(--rule-d);background:#08080a;border-radius:3px;overflow:hidden}
.plan__bar{display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:11px 15px;border-bottom:1px solid var(--rule-d);background:rgba(255,255,255,.025)}
.plan__bar b{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;
  font-weight:500;color:#c9ccd2}
.plan__bar span{font-family:var(--ff-mono);font-size:10px;letter-spacing:.12em;color:var(--muted-d)}
.plan svg{width:100%;height:auto;display:block}
.plan__out{
  border-top:1px solid var(--rule-d);padding:15px;min-height:98px;
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start;
  background:rgba(255,255,255,.02);
}
.plan__num{font-family:var(--ff-mono);font-size:11px;color:var(--signal);letter-spacing:.1em;padding-top:2px}
.plan__model{font-family:var(--ff-mono);font-size:12.5px;letter-spacing:.12em;color:#fff;margin-bottom:3px}
.plan__name{font-family:var(--ff-display);font-weight:700;font-size:15px;color:#fff;margin-bottom:6px}
.plan__desc{font-size:13.5px;line-height:1.55;color:#9ea2aa;margin:0}

.pl-wall{fill:none;stroke:rgba(255,255,255,.30);stroke-width:2}
.pl-furn{fill:rgba(255,255,255,.045);stroke:rgba(255,255,255,.20);stroke-width:1.1}
.pl-thin{fill:none;stroke:rgba(255,255,255,.14);stroke-width:1}
.pl-txt{fill:rgba(255,255,255,.42);font-family:var(--ff-mono);font-size:9.5px;letter-spacing:.11em;text-transform:uppercase}
.hot{cursor:pointer}
.hot circle{fill:#0a0a0b;stroke:var(--signal);stroke-width:1.6;transition:fill .16s,r .16s}
.hot text{fill:var(--signal);font-family:var(--ff-mono);font-size:10px;font-weight:600;text-anchor:middle;
  dominant-baseline:central;pointer-events:none;transition:fill .16s}
.hot:hover circle,.hot:focus circle,.hot.is-on circle{fill:var(--signal)}
.hot:hover text,.hot:focus text,.hot.is-on text{fill:#fff}
.hot:focus{outline:none}
.hot:focus circle{stroke:#fff}

/* ---------- 9. Grids & cards ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:1fr}
.g3{grid-template-columns:1fr}
.g4{grid-template-columns:1fr}
@media(min-width:680px){.g2,.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1000px){.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}}

.card{background:var(--plate);border:1px solid var(--rule-l);border-radius:3px;padding:26px;
  display:flex;flex-direction:column;transition:border-color .2s,transform .2s,box-shadow .2s}
.card:hover{border-color:#b9bdc5;box-shadow:0 12px 30px -22px rgba(10,10,11,.5)}
.band--dark .card,.band--carbon .card{background:var(--graphite);border-color:var(--rule-d)}
.band--dark .card:hover,.band--carbon .card:hover{border-color:rgba(255,255,255,.28)}
.card__n{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.18em;color:var(--signal);margin-bottom:14px}
.card p{margin-bottom:0}
.card__ttl{font-family:var(--ff-display);font-weight:700;font-size:19px;margin:0 0 10px;letter-spacing:-.01em}

/* pillar list with rule */
.pillars{display:grid;gap:0;border-top:1px solid var(--rule-l)}
.pillar{padding:26px 0;border-bottom:1px solid var(--rule-l);display:grid;gap:10px}
@media(min-width:860px){.pillar{grid-template-columns:230px minmax(0,1fr);gap:40px;align-items:start}}
.pillar h3{font-family:var(--ff-display);font-size:19px;font-weight:700;letter-spacing:-.01em}
.pillar p{margin:0;color:var(--muted-l)}
.band--dark .pillars,.band--dark .pillar{border-color:var(--rule-d)}
.band--dark .pillar p{color:#9fa3ab}

/* ---------- 10. Product cards ---------- */
.prod{background:var(--plate);border:1px solid var(--rule-l);border-radius:3px;overflow:hidden;
  display:flex;flex-direction:column;transition:border-color .2s,box-shadow .2s,transform .2s}
.prod:hover{border-color:#b9bdc5;transform:translateY(-2px);box-shadow:0 16px 36px -26px rgba(10,10,11,.55)}
.prod__img{position:relative;aspect-ratio:4/3;background:#fff;overflow:hidden;border-bottom:1px solid var(--rule-l-soft)}
.prod__img img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.3,1)}
.prod:hover .prod__img img{transform:scale(1.035)}
.prod__tag{position:absolute;top:11px;left:11px;background:var(--ink);color:#fff;
  font-family:var(--ff-mono);font-size:10px;letter-spacing:.14em;padding:5px 9px;border-radius:2px}
.prod__body{padding:22px;display:flex;flex-direction:column;flex:1}
.prod__name{font-family:var(--ff-display);font-weight:700;font-size:18px;letter-spacing:-.01em;margin:0 0 9px}
.prod__desc{font-size:14.5px;line-height:1.6;color:var(--muted-l);margin:0 0 16px}
.spec{border-top:1px solid var(--rule-l-soft);margin-top:auto;padding-top:14px;display:grid;gap:7px}
.spec li{display:grid;grid-template-columns:1fr auto;gap:14px;font-size:13px;align-items:baseline}
.spec b{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted-l);font-weight:500}
.spec span{text-align:right;font-weight:500;color:var(--text-l)}

/* ---------- 11. Category header ---------- */
.cat{padding-top:14px;border-top:2px solid var(--ink);margin-bottom:34px;
  display:grid;gap:14px}
@media(min-width:900px){.cat{grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:end}}
.cat__k{font-family:var(--ff-mono);font-size:11px;letter-spacing:.2em;color:var(--signal);margin-bottom:9px}
.cat h2{font-size:clamp(25px,3vw,38px);font-variation-settings:"wdth" 104}
.cat p{margin:0;color:var(--muted-l);font-size:15px}

/* ---------- 12. Data table ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--rule-l);border-radius:3px;background:var(--plate)}
.tbl{width:100%;border-collapse:collapse;min-width:660px;font-size:14px}
.tbl th{
  text-align:left;padding:14px 18px;background:var(--ink);color:#fff;font-weight:500;
  font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;white-space:nowrap;
}
.tbl td{padding:14px 18px;border-top:1px solid var(--rule-l-soft);vertical-align:top}
.tbl tr:hover td{background:#fafbfc}
.tbl td:first-child{font-family:var(--ff-mono);font-size:12.5px;letter-spacing:.06em;white-space:nowrap;font-weight:500}
.tbl .c-sig{color:var(--signal)}

/* ---------- 13. Signal chain ---------- */
.chain{display:grid;gap:14px;counter-reset:ch}
@media(min-width:900px){.chain{grid-template-columns:repeat(4,minmax(0,1fr));gap:0}}
.chain__step{
  border:1px solid var(--rule-d);padding:24px 22px;position:relative;background:rgba(255,255,255,.02);
}
@media(min-width:900px){
  .chain__step+.chain__step{border-left:none}
  .chain__step::after{
    content:"";position:absolute;right:-6px;top:50%;width:11px;height:11px;
    border-top:1px solid var(--signal);border-right:1px solid var(--signal);
    transform:translateY(-50%) rotate(45deg);background:var(--ink);z-index:2;
  }
  .chain__step:last-child::after{display:none}
}
.chain__k{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.18em;color:var(--signal);margin-bottom:12px}
.chain__step h3{font-family:var(--ff-display);font-size:17px;font-weight:700;margin:0 0 9px;color:#fff}
.chain__step p{font-size:13.8px;line-height:1.58;color:#9ea2aa;margin:0 0 12px}
.chain__models{display:flex;flex-wrap:wrap;gap:6px}
.chain__models span{font-family:var(--ff-mono);font-size:10px;letter-spacing:.08em;
  border:1px solid var(--rule-d);padding:4px 7px;border-radius:2px;color:#c3c6cc}

/* ---------- 14. Story (editorial) ---------- */
.story{display:grid;gap:30px}
@media(min-width:940px){.story{grid-template-columns:200px minmax(0,1fr);gap:56px;align-items:start}}
.story + .story{margin-top:52px;padding-top:52px;border-top:1px solid var(--rule-l)}
.band--dark .story + .story{border-top-color:var(--rule-d)}
.story__k{font-family:var(--ff-mono);font-size:11px;letter-spacing:.2em;color:var(--signal)}
.story__k b{display:block;font-family:var(--ff-display);font-size:16px;color:var(--text-l);
  letter-spacing:-.01em;margin-top:8px;font-weight:700}
.band--dark .story__k b{color:#fff}
.story__body{max-width:66ch}
.story__body p{font-size:16.8px;line-height:1.72}
.story__body p:last-child{margin-bottom:0}
.pull{
  font-family:var(--ff-display);font-weight:700;font-size:clamp(21px,2.6vw,31px);line-height:1.24;
  letter-spacing:-.018em;border-left:3px solid var(--signal);padding:6px 0 6px 24px;margin:32px 0;
}

/* ---------- 15. Founder note ---------- */
.note{background:var(--plate);border:1px solid var(--rule-l);border-radius:3px;padding:clamp(28px,4vw,52px)}
.note__sig{margin-top:30px;padding-top:22px;border-top:1px solid var(--rule-l);
  display:grid;gap:4px}
.note__sig b{font-family:var(--ff-display);font-size:16px}
.note__sig span{font-family:var(--ff-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-l)}

/* ---------- 16. Definition rows ---------- */
.defs{border-top:1px solid var(--rule-l)}
.def{display:grid;gap:6px;padding:20px 0;border-bottom:1px solid var(--rule-l)}
@media(min-width:800px){.def{grid-template-columns:250px minmax(0,1fr);gap:36px}}
.def dt{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--signal)}
.def dd{margin:0;color:var(--muted-l);font-size:15px}
.band--dark .defs,.band--dark .def{border-color:var(--rule-d)}
.band--dark .def dd{color:#9fa3ab}

/* ---------- 17. Stat strip ---------- */
.stats{display:grid;gap:1px;background:var(--rule-l);border:1px solid var(--rule-l)}
@media(min-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{background:var(--plate);padding:26px 22px}
.stat b{display:block;font-family:var(--ff-display);font-size:clamp(28px,3.4vw,42px);
  font-weight:800;letter-spacing:-.03em;line-height:1;font-variation-settings:"wdth" 100}
.stat span{display:block;margin-top:10px;font-family:var(--ff-mono);font-size:10.5px;
  letter-spacing:.15em;text-transform:uppercase;color:var(--muted-l)}
.band--dark .stats{background:var(--rule-d);border-color:var(--rule-d)}
.band--dark .stat{background:var(--carbon)}
.band--dark .stat span{color:var(--muted-d)}

/* ---------- 18. CTA band ---------- */
.cta{background:var(--signal);color:#fff;padding:clamp(46px,6vw,80px) 0}
.cta__in{display:grid;gap:26px;align-items:center}
@media(min-width:900px){.cta__in{grid-template-columns:minmax(0,1fr) auto;gap:48px}}
.cta h2{font-size:clamp(25px,3.4vw,42px);font-variation-settings:"wdth" 106;color:#fff}
.cta p{margin:14px 0 0;color:rgba(255,255,255,.86);max-width:56ch}
.cta .btn{background:#fff;color:var(--ink)!important;border-color:#fff}
.cta .btn:hover{background:var(--ink);color:#fff!important;border-color:var(--ink)}

/* ---------- 19. Forms ---------- */
.form{display:grid;gap:18px}
.field{display:grid;gap:7px}
.field label{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted-l)}
.field input,.field select,.field textarea{
  font-family:var(--ff-body);font-size:15px;padding:13px 14px;border:1px solid var(--rule-l);
  border-radius:2px;background:var(--plate);color:var(--text-l);width:100%;
}
.field textarea{min-height:150px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--signal)}
@media(min-width:700px){.form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px}}

/* ---------- 20. Footer ---------- */
.site-footer{background:var(--ink);color:var(--text-d);padding:clamp(48px,6vw,76px) 0 0}
.foot{display:grid;gap:36px;padding-bottom:44px}
@media(min-width:900px){.foot{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:44px}}
.foot h4{font-family:var(--ff-mono);font-size:10.5px;font-weight:500;letter-spacing:.18em;
  text-transform:uppercase;color:var(--signal);margin:0 0 16px}
.foot ul{display:grid;gap:9px}
.foot a{color:#a9adb4;text-decoration:none;font-size:14px}
.foot a:hover{color:#fff}
.foot p{font-size:14px;color:#a9adb4;margin:0 0 .7em}
.foot__brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}

/* engineering title block */
.tblock{border:1px solid var(--rule-d);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:26px}
@media(min-width:760px){.tblock{grid-template-columns:repeat(4,minmax(0,1fr))}}
.tblock div{padding:11px 14px;border-right:1px solid var(--rule-d);border-bottom:1px solid var(--rule-d)}
.tblock div:nth-child(2n){border-right:none}
@media(min-width:760px){
  .tblock div{border-bottom:none}
  .tblock div:nth-child(2n){border-right:1px solid var(--rule-d)}
  .tblock div:last-child{border-right:none}
}
.tblock dt{font-family:var(--ff-mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted-d);margin-bottom:5px}
.tblock dd{margin:0;font-family:var(--ff-mono);font-size:11.5px;color:#d6d8dc;letter-spacing:.05em}

.legal{border-top:1px solid var(--rule-d);padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:8px 26px;
  justify-content:space-between;font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.1em;color:#787d85}

/* ---------- 21. Misc ---------- */
.note-line{font-size:13px;color:var(--muted-l);border-left:2px solid var(--rule-l);padding-left:14px;margin-top:26px}
.band--dark .note-line{color:var(--muted-d);border-left-color:var(--rule-d)}
.rule{height:1px;background:var(--rule-l);border:0;margin:0}
.band--dark .rule{background:var(--rule-d)}
.mt-l{margin-top:44px}.mt-m{margin-top:28px}
.center{text-align:center}
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.is-in{opacity:1;transform:none}