/* U.S. Low Voltage — design system v1 */
:root{
  --ink:#101418;
  --ink-2:#1C2229;
  --slate:#333B44;
  --body:#454E59;
  --muted:#5E6874;
  --line:#E3E7EC;
  --line-2:#CFD6DE;
  --bg:#FFFFFF;
  --bg-alt:#F4F6F8;
  --bg-deep:#0C1013;
  --amber:#12897B;
  --amber-2:#0A5D55;
  --amber-btn:#0D6B60;
  --amber-ink:#0A5D55;
  --amber-soft:#E8F5F2;
  --on-dark:#FFFFFF;
  --on-dark-2:#C0C9D1;
  --on-dark-3:#8B96A1;
  --ok:#15803D;
  --focus:#0A5D55;
  --maxw:1160px;
  --r:4px;
  --shadow:0 1px 2px rgba(11,18,32,.05), 0 8px 24px -12px rgba(11,18,32,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.65;letter-spacing:-.006em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--amber-ink);text-underline-offset:3px}
a:hover{color:var(--amber-2)}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:2px}
h1,h2,h3,h4{
  font-family:'Space Grotesk','Inter',-apple-system,'Segoe UI',sans-serif;
  color:var(--ink);margin:0 0 .5em;font-weight:600;letter-spacing:-.025em;line-height:1.12;
}
h1{font-size:clamp(2.3rem,5.2vw,3.9rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem)}
h3{font-size:clamp(1.15rem,2vw,1.4rem);line-height:1.25}
h4{font-size:1.02rem;letter-spacing:-.01em}
p{margin:0 0 1.05em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{
  font-family:'Space Grotesk',sans-serif;font-size:.75rem;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--amber-ink);margin:0 0 14px;
}
.eyebrow.on-dark{color:#5EE0CD}
.lede{font-size:clamp(1.06rem,1.7vw,1.24rem);color:var(--slate);line-height:1.6}

/* ---------- header ---------- */
.alertbar{background:var(--ink);color:var(--on-dark-2);font-size:.85rem;text-align:center;padding:9px 16px;letter-spacing:.01em}
.alertbar a{color:#5EE0CD;font-weight:600;text-decoration:none;white-space:nowrap}
.alertbar a:hover{text-decoration:underline}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.nav{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:28px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;margin-right:auto;flex-shrink:0}
.brand .mark{width:32px;height:32px;flex-shrink:0}
.brand .nm{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.03rem;color:var(--ink);letter-spacing:-.03em;line-height:1.05}
.brand .nm small{display:block;font-size:.62rem;font-weight:500;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}
.nav nav{display:flex;gap:26px;align-items:center}
.nav nav a{color:var(--slate);text-decoration:none;font-size:.925rem;font-weight:500;padding:6px 0;border-bottom:2px solid transparent}
.nav nav a:hover{color:var(--ink);border-bottom-color:var(--amber)}
.nav nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--amber)}
.navcta{display:flex;align-items:center;gap:14px;flex-shrink:0}
.navtel{font-family:'Space Grotesk',sans-serif;font-weight:600;color:var(--ink);text-decoration:none;font-size:.95rem;letter-spacing:-.01em}
.navtel:hover{color:var(--amber-2)}
.mobnav{display:none;border-top:1px solid var(--line);background:var(--bg-alt)}
.mobnav div{max-width:var(--maxw);margin:0 auto;padding:10px 24px;display:flex;flex-wrap:wrap;gap:8px 18px}
.mobnav a{color:var(--slate);text-decoration:none;font-size:.88rem;font-weight:500}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:.93rem;letter-spacing:-.005em;
  padding:12px 22px;border-radius:var(--r);text-decoration:none;border:1px solid transparent;
  transition:background .15s,color .15s,border-color .15s;cursor:pointer;
}
.btn.primary{background:var(--amber-btn);color:#fff;border-color:var(--amber-btn)}
.btn.primary:hover{background:var(--amber-ink);border-color:var(--amber-ink);color:#fff}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn.ghost:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn.on-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.32)}
.btn.on-dark:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn.sm{padding:9px 16px;font-size:.87rem}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--bg-deep);color:var(--on-dark);overflow:hidden}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(900px 420px at 78% 8%, rgba(18,137,123,.22), transparent 62%),
    radial-gradient(700px 500px at 12% 92%, rgba(60,80,100,.30), transparent 65%);
}
.grid-bg{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%)}
.hero-in{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:104px 24px 96px}
.hero h1{color:#fff;max-width:17ch}
.hero .lede{color:var(--on-dark-2);max-width:60ch;margin-top:18px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);border-radius:var(--r);margin-top:60px;overflow:hidden}
.hero-stats div{background:#0C1013;padding:20px 22px}
.hero-stats b{display:block;font-family:'Space Grotesk',sans-serif;font-size:1.75rem;color:#fff;font-weight:600;letter-spacing:-.03em;line-height:1}
.hero-stats span{display:block;margin-top:7px;font-size:.79rem;color:var(--on-dark-3);letter-spacing:.02em}
.hero.sub .hero-in{padding:76px 24px 68px}
.hero.sub h1{font-size:clamp(2rem,4.2vw,3.05rem)}

/* ---------- sections ---------- */
section{padding:82px 0}
section.alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:62ch;margin-bottom:46px}
.sec-head p{margin-bottom:0}

/* ---------- capability cards ---------- */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.cap{background:var(--bg);padding:30px 26px 28px;display:flex;flex-direction:column}
.cap .ic{width:26px;height:26px;color:var(--amber);margin-bottom:16px}
.cap h3{font-size:1.08rem;margin-bottom:8px}
.cap p{font-size:.93rem;color:var(--body);margin-bottom:14px}
.cap .vendors{margin-top:auto;font-size:.74rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:500;border-top:1px solid var(--line);padding-top:13px}

/* ---------- feature rows ---------- */
.rows{display:grid;gap:1px;background:var(--line);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.row2{background:var(--bg);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:44px;padding:38px 0}
.row2 .k{font-family:'Space Grotesk',sans-serif;font-weight:600;color:var(--ink);font-size:1.18rem;letter-spacing:-.02em}
.row2 .k span{display:block;margin-top:8px;font-family:'Inter',sans-serif;font-weight:500;font-size:.76rem;letter-spacing:.06em;text-transform:uppercase;color:var(--amber-ink)}
.row2 p:last-child{margin-bottom:0}

/* ---------- lists ---------- */
.ticks{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.ticks li{position:relative;padding-left:28px;font-size:.96rem;color:var(--body)}
.ticks li::before{
  content:"";position:absolute;left:0;top:.42em;width:13px;height:8px;
  border-left:2px solid var(--amber);border-bottom:2px solid var(--amber);transform:rotate(-45deg);
}
.ticks.two{grid-template-columns:1fr 1fr;gap:11px 34px}

/* ---------- spec disclosure ---------- */
details.spec{border:1px solid var(--line);border-radius:var(--r);background:var(--bg-alt);margin-top:26px}
details.spec summary{
  cursor:pointer;padding:15px 20px;font-family:'Space Grotesk',sans-serif;font-weight:600;
  color:var(--ink);font-size:.93rem;list-style:none;display:flex;align-items:center;gap:10px;
}
details.spec summary::-webkit-details-marker{display:none}
details.spec summary::before{content:"+";color:var(--amber);font-size:1.2rem;line-height:1;width:14px}
details.spec[open] summary::before{content:"\2212"}
details.spec .body{padding:2px 20px 20px;font-size:.9rem;color:var(--slate);border-top:1px solid var(--line)}
details.spec .body p:first-child{margin-top:16px}

/* ---------- partners ---------- */
.partners{display:flex;flex-wrap:wrap;gap:10px}
.partners span{
  border:1px solid var(--line-2);border-radius:100px;padding:7px 16px;font-size:.83rem;
  color:var(--slate);background:var(--bg);font-weight:500;letter-spacing:.01em;
}

/* ---------- callout ---------- */
.callout{background:var(--ink);color:var(--on-dark);border-radius:var(--r);padding:52px 46px;display:grid;grid-template-columns:1.4fr auto;gap:36px;align-items:center}
.callout h2{color:#fff;margin-bottom:10px}
.callout p{color:var(--on-dark-2);margin-bottom:0;max-width:56ch}
.callout .a{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- contact ---------- */
.cgrid{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.cblock{border-top:2px solid var(--ink);padding-top:20px;margin-bottom:32px}
.cblock h3{font-size:1rem;margin-bottom:6px}
.cblock a{font-family:'Space Grotesk',sans-serif;font-size:1.5rem;font-weight:600;color:var(--ink);text-decoration:none;letter-spacing:-.03em}
.cblock a:hover{color:var(--amber-2)}
.cblock address{font-style:normal;color:var(--body);font-size:.97rem}

/* ---------- footer ---------- */
footer{background:var(--ink);color:var(--on-dark-3);padding:64px 0 30px;font-size:.9rem}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
footer .fh{color:#fff;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px;font-weight:600}
footer a{color:var(--on-dark-2);text-decoration:none;display:block;margin-bottom:9px}
footer a:hover{color:#fff}
footer .fb{max-width:34ch;color:var(--on-dark-3);line-height:1.6}
.fbot{border-top:1px solid rgba(255,255,255,.12);margin-top:48px;padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.83rem;color:var(--on-dark-3)}
.fbot a{display:inline;margin:0}

@media (max-width:960px){
  .caps{grid-template-columns:1fr 1fr}
  .fgrid{grid-template-columns:1fr 1fr;gap:34px}
  .cgrid{grid-template-columns:1fr;gap:38px}
  .callout{grid-template-columns:1fr;padding:40px 30px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .row2{grid-template-columns:1fr;gap:14px;padding:30px 0}
}
@media (max-width:760px){
  .nav nav{display:none}
  .mobnav{display:block}
  .nav{min-height:64px;gap:14px}
  .navtel{font-size:.9rem}
}
@media (max-width:560px){
  body{font-size:16px}
  section{padding:58px 0}
  .hero-in{padding:70px 24px 62px}
  .caps{grid-template-columns:1fr}
  .ticks.two{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
  .callout{padding:34px 24px}
}

/* --- narrow-screen header fixes --- */
@media (max-width:820px){
  .navcta .btn{display:none}
  .brand .nm small{display:none}
}
@media (max-width:400px){
  .brand .nm{font-size:.95rem}
  .navtel{font-size:.86rem}
  .alertbar{font-size:.78rem;padding:8px 12px}
}

/* --- utility classes (replaced former inline style attributes; required for a
   Content-Security-Policy without 'unsafe-inline') --- */
.u-mt4{margin-top:4px}
.u-note{color:var(--muted);font-size:.92rem;margin-bottom:0}
.u-mb0{margin-bottom:0}
.u-meta{display:grid;gap:6px;font-size:.85rem;font-weight:500;color:var(--slate)}
.u-nound{text-decoration:none}
.u-mb0-mt14{margin-bottom:0;margin-top:14px}
.u-field{font:inherit;padding:11px 13px;border:1px solid var(--line-2);border-radius:4px;background:#fff;color:var(--ink)}
.u-resize-y{resize:vertical}
.u-tac{text-align:center}
.u-offscreen{position:absolute;left:-9999px}
.u-mt44{margin-top:44px}
.u-ml10{margin-left:10px}
.u-h2sm{font-size:1.5rem}
.u-h3size{font-size:clamp(1.15rem,2vw,1.4rem);line-height:1.25}
.u-formmsg{font-size:.9rem;margin:0;min-height:1.4em}
.u-stack16{display:grid;gap:16px;margin-top:26px}