/* ============================================================
   QUOVEX FIRE SAFETY — design system
   Palette locked to brand: petrol navy #113A4F, flame #E4572E.
   Type: Saira (display, from the wordmark) · IBM Plex Sans (body)
         · IBM Plex Mono (clause tags, data, eyebrows — the vernacular
         of a practice that works in code clauses).
   ============================================================ */

:root{
  --ink:#0A2231;        /* deep hero navy */
  --navy:#113A4F;       /* brand primary */
  --navy-2:#1B4F6B;     /* lifted navy */
  --flame:#E4572E;      /* brand accent */
  --flame-deep:#C4431F; /* accent hover */
  --paper:#F4F6F7;      /* cool off-white body */
  --paper-2:#EAEEF0;    /* alt band */
  --slate:#5B6B7B;      /* muted text */
  --line:#D5DCE0;       /* hairlines */
  --white:#FFFFFF;

  --display:"Saira","Arial Narrow",sans-serif;
  --body:"IBM Plex Sans",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;

  --wrap:1200px;
  --gap:clamp(1.5rem,4vw,3rem);
  --radius:3px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--body);
  font-size:17px;
  line-height:1.65;
  color:var(--navy);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-family:var(--display);font-weight:700;line-height:1.05;margin:0;color:var(--ink);letter-spacing:-0.01em}
h1{font-size:clamp(2.6rem,6vw,4.6rem)}
h2{font-size:clamp(2rem,4vw,3.1rem)}
h3{font-size:clamp(1.3rem,2vw,1.6rem)}
p{margin:0 0 1rem}
a{color:var(--flame);text-decoration:none}
a:hover{color:var(--flame-deep)}
img,svg{max-width:100%;display:block}

.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(1.25rem,4vw,2.5rem)}
.section{padding-block:clamp(3.5rem,7vw,6rem)}
.section--tight{padding-block:clamp(2.5rem,5vw,4rem)}

/* ---- engineering eyebrow: mono clause-tag ---- */
.eyebrow{
  font-family:var(--mono);
  font-size:.74rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--flame);
  display:inline-flex;align-items:center;gap:.6rem;
  margin-bottom:1.1rem;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:var(--flame);display:inline-block;
}
.eyebrow--light{color:#F0A48C}
.eyebrow--light::before{background:#F0A48C}

.lede{font-size:clamp(1.1rem,1.6vw,1.28rem);line-height:1.6;color:var(--navy)}
.muted{color:var(--slate)}

/* ---- buttons ---- */
.btn{
  font-family:var(--mono);font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:.6rem;
  padding:.95rem 1.6rem;border-radius:var(--radius);
  border:1px solid transparent;cursor:pointer;transition:transform .15s,background .2s,color .2s;
}
.btn:hover{transform:translateY(-2px)}
.btn--flame{background:var(--flame);color:#fff}
.btn--flame:hover{background:var(--flame-deep);color:#fff}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--navy)}
.btn--ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.btn--ghost-light:hover{border-color:#fff;color:#fff}
.btn .arw{transition:transform .2s}
.btn:hover .arw{transform:translateX(4px)}

/* ============================================================ header */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(244,246,247,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-head__row{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;height:74px}
.brand{display:flex;align-items:center}
.brand img{height:42px;width:auto}
.nav{display:flex;align-items:center;gap:1.75rem}
.nav a.navlink{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--navy);position:relative;padding-block:.4rem;
}
.nav a.navlink:hover{color:var(--flame)}
.nav a.navlink[aria-current="page"]{color:var(--flame)}
.nav a.navlink[aria-current="page"]::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:2px;background:var(--flame);
}
.nav .btn{padding:.65rem 1.15rem}
.navtoggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius);
  width:44px;height:44px;cursor:pointer;align-items:center;justify-content:center}
.navtoggle span,.navtoggle span::before,.navtoggle span::after{
  content:"";display:block;width:20px;height:2px;background:var(--navy);position:relative;transition:.2s}
.navtoggle span::before{position:absolute;top:-6px}
.navtoggle span::after{position:absolute;top:6px}

@media (max-width:900px){
  .navtoggle{display:inline-flex}
  .nav{
    position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;
    background:var(--white);border-bottom:1px solid var(--line);padding:1rem clamp(1.25rem,4vw,2.5rem) 1.5rem;
    transform:translateY(-120%);transition:transform .25s;box-shadow:0 20px 40px rgba(10,34,49,.08);
  }
  .nav.open{transform:translateY(0)}
  .nav a.navlink{width:100%;padding-block:.85rem;border-bottom:1px solid var(--line)}
  .nav .btn{margin-top:1rem;width:100%;justify-content:center}
}

/* ============================================================ hero */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero__grid{
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 90% 80% at 70% 20%,#000,transparent 75%);
}
.hero__mark{
  position:absolute;right:-4%;top:50%;transform:translateY(-50%);
  width:min(680px,60%);opacity:.1;pointer-events:none;
}
@media (max-width:820px){
  .hero__mark{right:-18%;width:min(460px,80%);opacity:.07}
}
.hero__inner{position:relative;padding-block:clamp(4.5rem,11vw,8.5rem)}
.hero h1{color:#fff;max-width:16ch}
.hero h1 .accent{color:var(--flame)}
.hero__sub{max-width:52ch;margin-top:1.6rem;color:#C6D2D9;font-size:clamp(1.05rem,1.6vw,1.25rem)}
.hero__cta{display:flex;flex-wrap:wrap;gap:1rem;margin-top:2.4rem}
.hero__meta{
  display:flex;flex-wrap:wrap;gap:2rem;margin-top:3.2rem;padding-top:1.6rem;
  border-top:1px solid rgba(255,255,255,.12);
}
.hero__meta div{font-family:var(--mono);font-size:.78rem;letter-spacing:.05em;color:#9FB2BC;text-transform:uppercase}
.hero__meta strong{display:block;font-family:var(--display);font-size:1.5rem;color:#fff;letter-spacing:0;text-transform:none;margin-top:.2rem}

/* ============================================================ generic blocks */
.grid{display:grid;gap:var(--gap)}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.cols-3,.cols-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.cols-2,.cols-3,.cols-4{grid-template-columns:1fr}}

.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4.5rem);align-items:center}
.split--text{grid-template-columns:0.9fr 1.1fr}
@media (max-width:820px){.split,.split--text{grid-template-columns:1fr}}

/* service cards */
.scard{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.7rem 1.6rem 1.5rem;display:flex;flex-direction:column;gap:.5rem;
  transition:transform .18s,box-shadow .18s,border-color .18s;position:relative;
}
.scard:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(10,34,49,.09);border-color:transparent}
.scard__no{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;color:var(--flame)}
.scard h3{font-size:1.28rem;color:var(--navy)}
.scard p{font-size:.96rem;color:var(--slate);margin:0}
.scard__link{font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;margin-top:.6rem;display:inline-flex;gap:.5rem;align-items:center}
.scard::after{content:"";position:absolute;left:0;top:0;width:3px;height:0;background:var(--flame);transition:height .2s;border-radius:var(--radius) 0 0 var(--radius)}
.scard:hover::after{height:100%}

/* feature (why us) */
.feature{border-top:2px solid var(--navy);padding-top:1.1rem}
.feature h3{font-size:1.18rem;margin-bottom:.4rem;color:var(--navy)}
.feature p{font-size:.96rem;color:var(--slate);margin:0}

/* process steps */
.step{display:flex;gap:1.3rem;padding:1.4rem 0;border-top:1px solid var(--line)}
.step:last-child{border-bottom:1px solid var(--line)}
.step__no{font-family:var(--mono);font-size:.8rem;color:var(--flame);letter-spacing:.1em;padding-top:.2rem;min-width:44px}
.step h3{font-size:1.22rem;margin-bottom:.3rem;color:var(--navy)}
.step p{margin:0;color:var(--slate);font-size:.98rem}

/* stat band */
.statband{background:var(--navy);color:#fff}
.stat{text-align:left}
.stat strong{font-family:var(--display);font-size:clamp(2.4rem,4vw,3.4rem);display:block;line-height:1;color:#fff}
.stat span{font-family:var(--mono);font-size:.76rem;letter-spacing:.12em;text-transform:uppercase;color:#9FB2BC}
.stat .flame{color:var(--flame)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:.6rem}
.chip{font-family:var(--mono);font-size:.76rem;letter-spacing:.04em;background:var(--white);border:1px solid var(--line);
  border-radius:100px;padding:.4rem .9rem;color:var(--navy)}

/* callout band */
.band{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.band .hero__grid{opacity:.4}
.band h2{color:#fff}
.band p{color:#C6D2D9}

/* list with flame ticks */
.ticks{list-style:none;padding:0;margin:0;display:grid;gap:.7rem}
.ticks li{position:relative;padding-left:1.7rem;color:var(--navy)}
.ticks li::before{content:"";position:absolute;left:0;top:.55em;width:9px;height:9px;background:var(--flame);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%)}
.ticks--light li{color:#D8E1E6}

/* prose page */
.prose h2{margin-top:2.5rem;margin-bottom:.8rem}
.prose h3{margin-top:1.8rem;margin-bottom:.5rem;color:var(--navy)}
.prose p{color:var(--navy);max-width:68ch}
.prose .muted{color:var(--slate)}

/* breadcrumb */
.crumb{font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate);margin-bottom:1rem}
.crumb a{color:var(--slate)}
.crumb a:hover{color:var(--flame)}

/* service hero */
.shero{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.shero .hero__grid{opacity:.35}
.shero h1{color:#fff;max-width:18ch}
.shero .crumb,.shero .crumb a{color:#9FB2BC}
.shero__sub{color:#C6D2D9;max-width:54ch;margin-top:1.2rem;font-size:1.1rem}

/* form */
.form{display:grid;gap:1.1rem}
.field{display:flex;flex-direction:column;gap:.4rem}
.field label{font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--navy)}
.field input,.field select,.field textarea{
  font-family:var(--body);font-size:1rem;padding:.85rem .95rem;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--white);color:var(--navy);width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--flame);outline-offset:1px;border-color:transparent}
.form__note{font-size:.85rem;color:var(--slate)}
.form-ok{background:#EAF3EE;border:1px solid #B7D8C4;color:#1E6B41;padding:1rem;border-radius:var(--radius);display:none}
.form-ok.show{display:block}

/* contact cards */
.cinfo{display:grid;gap:1.3rem}
.cinfo__item{border-left:2px solid var(--flame);padding-left:1rem}
.cinfo__item span{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:var(--slate);display:block;margin-bottom:.15rem}
.cinfo__item a,.cinfo__item strong{font-size:1.05rem;color:var(--navy);font-weight:500}

/* ============================================================ footer */
.site-foot{background:var(--ink);color:#B9C6CE;padding-block:clamp(3rem,5vw,4.5rem) 2rem;font-size:.94rem}
.site-foot a{color:#B9C6CE}
.site-foot a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:2.5rem}
@media (max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}
.site-foot img{height:38px;margin-bottom:1rem}
.foot-h{font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:#7E939E;margin-bottom:1rem}
.foot-list{list-style:none;padding:0;margin:0;display:grid;gap:.55rem}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;
  margin-top:2.8rem;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.1);
  font-family:var(--mono);font-size:.74rem;letter-spacing:.04em;color:#7E939E}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

:focus-visible{outline:2px solid var(--flame);outline-offset:2px}

/* ===== service hero PHOTO watermark (right side, behind heading) ===== */
.shero{position:relative;overflow:hidden}
.shero__photo{
  position:absolute;top:0;right:0;bottom:0;
  width:min(58%,760px);
  background-size:cover;background-position:center;
  opacity:.34;
  /* fade the photo into the navy on its left edge so heading text stays clean */
  -webkit-mask-image:linear-gradient(to right,transparent 0%,#000 38%);
          mask-image:linear-gradient(to right,transparent 0%,#000 38%);
  pointer-events:none;z-index:0;
}
.shero__photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to right,var(--navy) 0%,transparent 40%);
}
.shero .wrap{position:relative;z-index:1}
@media (max-width:820px){
  .shero__photo{width:70%;opacity:.14}
}