:root{
  --slate:#16242f;        /* sub-slab: headers, footer */
  --slate-2:#22374a;      /* hover / secondary panels */
  --concrete:#f2f2ee;     /* page background */
  --card:#ffffff;
  --ink:#1c2830;
  --muted:#5b6b76;
  --line:#d8dcd9;
  --red:#b23a2c;          /* manometer fluid accent */
  --red-dark:#93291d;
  --steel:#38678a;        /* links */
  --focus:#e8a13d;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{font-family:"Public Sans",system-ui,-apple-system,sans-serif;background:var(--concrete);color:var(--ink);line-height:1.65;font-size:17px}
img,svg{max-width:100%;display:block}
a{color:var(--steel)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.container{max-width:1080px;margin:0 auto;padding:0 22px}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

/* ---------- header ---------- */
.topbar{background:var(--slate);color:#cfd9de;font-size:13.5px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;padding-top:7px;padding-bottom:7px;gap:12px}
.topbar span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar a{color:#fff;text-decoration:none;font-weight:600}
header.site{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
header.site .container{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.brand svg{width:34px;height:34px;flex:none}
.brand b{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:22px;letter-spacing:.04em;text-transform:uppercase;line-height:1.05;display:block}
.brand small{display:block;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
nav.main{display:flex;gap:26px;align-items:center}
nav.main a{color:var(--ink);text-decoration:none;font-weight:600;font-size:15px}
nav.main a:hover{color:var(--red)}
nav.main a[aria-current="page"]{color:var(--red);border-bottom:2px solid var(--red);padding-bottom:2px}
.callbtn{background:var(--red);color:#fff !important;padding:10px 18px;border-radius:4px;font-weight:700;text-decoration:none;white-space:nowrap;font-size:15px}
.callbtn:hover{background:var(--red-dark)}
.navtoggle{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:8px 10px;font-size:18px;line-height:1;cursor:pointer;color:var(--ink)}
@media(max-width:880px){
  nav.main{display:none;position:absolute;top:100%;left:0;right:0;background:var(--card);border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:16px 22px;gap:14px}
  nav.main.open{display:flex}
  .navtoggle{display:block}
}

/* ---------- hero ---------- */
.hero{background:var(--slate);color:#eef2f0;padding:58px 0 50px;position:relative;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.hero .eyebrow{font-family:"IBM Plex Mono",monospace;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:#9db4c0;margin-bottom:14px}
.hero h1{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:clamp(38px,5.4vw,58px);line-height:1.04;text-transform:uppercase;letter-spacing:.01em;color:#fff}
.hero p.lede{margin-top:16px;font-size:18.5px;color:#c7d3da;max-width:52ch}
.hero .ctas{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 24px;border-radius:4px;font-weight:700;text-decoration:none;font-size:16px}
.btn.primary{background:var(--red);color:#fff}
.btn.primary:hover{background:var(--red-dark)}
.btn.ghost{border:2px solid #51707f;color:#fff}
.btn.ghost:hover{border-color:#fff}
.hero .diagram{background:#0f1a22;border:1px solid #2c4150;border-radius:6px;padding:18px}
.hero .diagram figcaption{font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:#7d97a5;margin-top:10px;letter-spacing:.06em}
@media(max-width:880px){.hero .container{grid-template-columns:1fr}.hero .diagram{max-width:460px}}

/* ---------- gauge stat strip ---------- */
.gauges{background:#0f1a22;border-top:1px solid #2c4150}
.gauges .container{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.gauge{padding:20px 14px;text-align:center;border-left:1px solid #223543}
.gauge:first-child{border-left:none}
.gauge b{font-family:"IBM Plex Mono",monospace;font-size:28px;color:#fff;display:block;letter-spacing:-.02em}
.gauge b i{font-style:normal;color:var(--red)}
.gauge span{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:#8ea6b3;display:block;margin-top:4px}
@media(max-width:720px){.gauges .container{grid-template-columns:repeat(2,1fr)}.gauge:nth-child(3){border-left:none}}

/* ---------- sections ---------- */
main{padding:8px 0 0}
section.block{padding:44px 0 10px}
section.block:last-of-type{padding-bottom:44px}
.kicker{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--red);display:flex;align-items:center;gap:10px;margin-bottom:10px}
.kicker::before{content:"";width:26px;height:2px;background:var(--red);display:inline-block}
h2.sect{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:clamp(27px,3.4vw,36px);text-transform:uppercase;line-height:1.08;margin-bottom:16px;color:var(--slate)}
h3.sub{font-family:"Barlow Condensed",sans-serif;font-weight:600;font-size:22px;text-transform:uppercase;margin:22px 0 8px;color:var(--slate)}
.prose{max-width:72ch}
.prose p{margin-bottom:15px}
.prose ul{margin:0 0 15px 20px}
.prose li{margin-bottom:8px}
.prose b{color:var(--slate)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:34px}
@media(max-width:820px){.two-col{grid-template-columns:1fr}}

/* ---------- process steps ---------- */
ol.process{list-style:none;counter-reset:step;max-width:72ch}
ol.process li{counter-increment:step;position:relative;padding:0 0 20px 58px;border-left:2px solid var(--line);margin-left:20px}
ol.process li:last-child{border-left-color:transparent;padding-bottom:4px}
ol.process li::before{content:counter(step,decimal-leading-zero);font-family:"IBM Plex Mono",monospace;position:absolute;left:-21px;top:-2px;background:var(--slate);color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600}
ol.process li b{display:block;font-family:"Barlow Condensed",sans-serif;text-transform:uppercase;font-size:19px;color:var(--slate);margin-bottom:2px}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:22px;border-top:3px solid var(--slate)}
.card h3{font-family:"Barlow Condensed",sans-serif;font-weight:700;text-transform:uppercase;font-size:20px;margin-bottom:8px;color:var(--slate)}
.card p{font-size:15.5px;color:var(--muted)}
.card a{font-weight:700;font-size:14.5px;text-decoration:none;display:inline-block;margin-top:10px}
@media(max-width:820px){.cards{grid-template-columns:1fr}}

/* ---------- guarantee band ---------- */
.guarantee{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--red);border-radius:6px;padding:26px 28px;max-width:820px}
.guarantee h3{font-family:"Barlow Condensed",sans-serif;text-transform:uppercase;font-size:24px;color:var(--slate);margin-bottom:8px}

/* ---------- FAQ ---------- */
.faq{max-width:78ch}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:6px;margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:16px 20px;font-weight:700;color:var(--slate);display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:"IBM Plex Mono",monospace;color:var(--red);font-size:20px;flex:none}
.faq details[open] summary::after{content:"\2013"}
.faq .a{padding:0 20px 18px;color:var(--ink)}
.faq .a p{margin-bottom:10px}

/* ---------- CTA band ---------- */
.ctaband{background:var(--slate);color:#fff;margin-top:48px}
.ctaband .container{padding:44px 22px;display:flex;justify-content:space-between;align-items:center;gap:26px;flex-wrap:wrap}
.ctaband h2{font-family:"Barlow Condensed",sans-serif;text-transform:uppercase;font-size:clamp(26px,3.4vw,36px);line-height:1.05}
.ctaband p{color:#b9c8d0;margin-top:6px}

/* ---------- forms ---------- */
form.quote{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:26px;max-width:560px}
form.quote label{display:block;font-weight:700;font-size:14px;margin:14px 0 5px;color:var(--slate)}
form.quote input,form.quote select,form.quote textarea{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:4px;font:inherit;font-size:16px;background:#fbfbfa}
form.quote button{margin-top:20px;width:100%;background:var(--red);border:none;color:#fff;padding:15px;font-weight:700;font-size:16px;border-radius:4px;cursor:pointer}
form.quote button:hover{background:var(--red-dark)}
form.quote .fine{font-size:12.5px;color:var(--muted);margin-top:10px}

/* ---------- footer ---------- */
footer.site{background:#0f1a22;color:#9db1bc;margin-top:0;font-size:14.5px}
footer.site .container{padding:44px 22px 30px;display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:34px}
footer.site h4{font-family:"Barlow Condensed",sans-serif;color:#fff;text-transform:uppercase;letter-spacing:.06em;font-size:16px;margin-bottom:10px}
footer.site a{color:#c3d2da;text-decoration:none}
footer.site a:hover{color:#fff}
footer.site ul{list-style:none}
footer.site li{margin-bottom:7px}
.footbottom{border-top:1px solid #22323e;padding:16px 22px;font-size:12.5px;color:#6f8592;text-align:center}
@media(max-width:820px){footer.site .container{grid-template-columns:1fr}}

/* ---------- sticky mobile call bar ---------- */
.mobilebar{display:none;position:fixed;bottom:0;left:0;right:0;z-index:60;background:var(--slate);border-top:1px solid #2c4150}
.mobilebar a{flex:1;text-align:center;padding:15px 8px;color:#fff;text-decoration:none;font-weight:700;font-size:15px}
.mobilebar a.q{background:var(--red)}
@media(max-width:720px){.mobilebar{display:flex}body{padding-bottom:54px}}

/* ---------- breadcrumbs / page hero ---------- */
.pagehero{background:var(--slate);color:#fff;padding:44px 0 38px}
.pagehero h1{font-family:"Barlow Condensed",sans-serif;font-weight:700;text-transform:uppercase;font-size:clamp(32px,4.6vw,48px);line-height:1.05}
.pagehero p{color:#c7d3da;margin-top:12px;max-width:62ch;font-size:18px}
.crumbs{font-family:"IBM Plex Mono",monospace;font-size:12px;color:#8ea6b3;margin-bottom:14px;letter-spacing:.05em}
.crumbs a{color:#c3d2da;text-decoration:none}

/* zone table on testing page */
.zones{border-collapse:collapse;width:100%;max-width:760px;margin:6px 0 18px;background:var(--card);border:1px solid var(--line)}
.zones th,.zones td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:15.5px;vertical-align:top}
.zones th{font-family:"Barlow Condensed",sans-serif;text-transform:uppercase;background:#e9eae5;color:var(--slate);font-size:15px;letter-spacing:.05em}
.zones td.z{font-family:"IBM Plex Mono",monospace;font-weight:600;white-space:nowrap}
.zones tr.hot td.z{color:var(--red)}

/* ---------- in-page diagram blocks ---------- */
.dblock{background:#0f1a22;border:1px solid #2c4150;border-radius:6px;padding:18px;margin:20px 0 8px;max-width:780px}
.dblock figcaption{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11.5px;color:#7d97a5;margin-top:10px;letter-spacing:.06em;line-height:1.5}
.dblock .drules{list-style:none;margin:14px 0 0;padding:12px 0 0;border-top:1px solid #2c4150;font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:12.5px;color:#9db4c0;line-height:1.75}
.dblock .drules li{padding-left:16px;position:relative}
.dblock .drules li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:2px;background:#b23a2c}