:root{
    --bg:#ffffff;
    --alt:#f5f5f7;
    --ink:#434446;
    --grey:#6e6e73;
    --grey2:#86868b;
    --hair:#d2d2d7;
    --dark:#000000;
    --dark-grey:#a1a1a6;
    --brand:#FA861F;
    --accent-text:#AD5800;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','SF Pro Text','Inter','Helvetica Neue',Helvetica,Arial,sans-serif;
    font-size:17px;line-height:1.55;
    letter-spacing:-.011em;
    -webkit-font-smoothing:antialiased;
  }
  ::selection{background:var(--ink);color:#fff}
  a{color:inherit;text-decoration:none}
  img{max-width:100%}
  :focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

  h1,h2,h3{letter-spacing:-.025em;text-wrap:balance}
  .eyebrow{font-size:.8rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--grey2)}
  .sub{font-size:1.3rem;line-height:1.45;color:var(--grey);font-weight:400;max-width:34em}
  .center{text-align:center}
  .center .sub{margin-left:auto;margin-right:auto}
  .tlink{color:var(--accent-text);font-weight:500}
  .tlink:hover{text-decoration:underline}
  .tlink::after{content:" ›"}

  /* nav */
  header.site{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.75);
    backdrop-filter:saturate(180%) blur(20px);
    -webkit-backdrop-filter:saturate(180%) blur(20px);
    border-bottom:1px solid rgba(0,0,0,.06);
  }
  .navwrap{
    max-width:1024px;margin:0 auto;
    display:flex;align-items:center;justify-content:space-between;gap:1rem;
    padding:.55rem 1.2rem;min-height:48px;
  }
  .brand{display:flex;align-items:center;gap:.5rem;font-weight:600;font-size:.95rem;letter-spacing:-.01em}
  .brand svg{display:block}
  .wordmark{font-weight:700;font-size:.8rem;letter-spacing:.06em}
  .wordmark b{color:var(--brand);font-weight:700}
  nav.pages{display:flex;gap:.2rem;flex-wrap:wrap}
  nav.pages a{
    font-size:.8rem;color:rgba(29,29,31,.72);
    padding:.4rem .7rem;border-radius:980px;font-weight:400;
  }
  nav.pages a:hover{color:var(--ink)}
  nav.pages a.active{color:var(--ink);font-weight:600}
  .pill{
    display:inline-block;
    font-size:.95rem;font-weight:500;letter-spacing:-.01em;
    background:var(--ink);color:#fff;
    padding:.72em 1.5em;border-radius:980px;
    border:none;cursor:pointer;
    transition:transform .2s ease,opacity .2s ease;
  }
  .pill:hover{opacity:.85}
  .pill.small{font-size:.8rem;padding:.5em 1.1em}
  .pill.light{background:#fff;color:var(--ink)}
  .pill.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--hair)}
  .pill.ghost:hover{box-shadow:inset 0 0 0 1px var(--grey2);opacity:1}
  .on-dark .pill.ghost{color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.4)}
  .on-dark .pill.ghost:hover{box-shadow:inset 0 0 0 1px rgba(255,255,255,.8)}

  /* layout */
  .page{min-height:60vh}
  section.band{padding:clamp(4.5rem,10vw,8rem) 1.4rem}
  section.band.alt{background:var(--alt)}
  section.band.dark{background:var(--dark);color:#f5f5f7}
  section.band.dark .sub{color:var(--dark-grey)}
  .inner{max-width:1024px;margin:0 auto}
  .inner.narrow{max-width:700px}

  /* hero */
  .hero{padding:clamp(5.5rem,13vw,10rem) 1.4rem clamp(4rem,9vw,7rem)}
  .hero h1{
    font-size:clamp(3rem,8vw,5.6rem);
    font-weight:700;line-height:1.04;letter-spacing:-.032em;
    max-width:15ch;margin:1.1rem auto 0;
  }
  .hero .sub{margin-top:1.5rem;font-size:1.45rem}
  .hero .actions{display:flex;gap:1.4rem;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:2.4rem}

  h2.big{font-size:clamp(2.2rem,5.5vw,3.8rem);font-weight:700;line-height:1.08}
  h2.giant{font-size:clamp(2.8rem,7vw,5rem);font-weight:700;line-height:1.05}
  .band .sub{margin-top:1.1rem}
  .band .actions{display:flex;gap:1.4rem;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:2rem}

  /* tiles */
  .tiles{display:grid;gap:1rem;margin-top:3rem}
  @media(min-width:760px){.tiles{grid-template-columns:1fr 1fr}.tile.wide{grid-column:1/-1}}
  .tile{
    background:var(--alt);border-radius:28px;
    padding:clamp(2.2rem,5vw,3.5rem) clamp(1.6rem,4vw,3rem);
    text-align:center;
    display:flex;flex-direction:column;align-items:center;gap:.7rem;
  }
  .tile.on-dark{background:var(--dark);color:#f5f5f7}
  .white .tile{background:var(--alt)}
  .alt .tile{background:#fff}
  .tile h3{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;letter-spacing:-.022em}
  .tile p{color:var(--grey);max-width:44ch;font-size:1.02rem}
  .tile.on-dark p{color:var(--dark-grey)}
  .tile .meta{font-size:.78rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--grey2)}
  .tile .tlink{margin-top:.4rem}

  /* standards */
  .stds{display:grid;gap:2.5rem;margin-top:3.5rem}
  @media(min-width:700px){.stds{grid-template-columns:repeat(3,1fr)}}
  .std{text-align:center}
  .std .code{font-size:clamp(2rem,4.5vw,3rem);font-weight:300;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
  .std .what{color:var(--grey);margin-top:.5rem;font-size:1rem}

  /* sector rail */
  .rail{
    display:flex;gap:1rem;overflow-x:auto;scroll-snap-type:x mandatory;
    padding:3rem 1.4rem 1rem;
    -ms-overflow-style:none;scrollbar-width:none;
  }
  .rail::-webkit-scrollbar{display:none}
  .rail .card{
    scroll-snap-align:center;
    flex:0 0 min(78vw,340px);
    background:#fff;border-radius:24px;
    padding:2.2rem 1.9rem;
    text-align:left;
  }
  .rail .card .meta{font-size:.75rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--grey2)}
  .rail .card h3{font-size:1.4rem;font-weight:700;margin-top:.5rem}
  .rail .card ul{list-style:none;margin-top:1rem;display:flex;flex-direction:column;gap:.45rem}
  .rail .card li{color:var(--grey);font-size:.98rem}

  /* stats inline */
  .figures{display:flex;gap:clamp(2rem,6vw,4.5rem);justify-content:center;flex-wrap:wrap;margin-top:3rem}
  .figure{text-align:center}
  .figure .n{font-size:clamp(2.6rem,6vw,4.2rem);font-weight:600;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
  .figure .l{color:var(--dark-grey);font-size:.95rem;margin-top:.3rem}
  .white .figure .l,.alt .figure .l{color:var(--grey)}
  .dark .figure .n{color:var(--brand)}

  /* page head */
  .pagehead{padding:clamp(4.5rem,10vw,7.5rem) 1.4rem clamp(3rem,7vw,5rem)}
  .pagehead h1{font-size:clamp(2.6rem,6.5vw,4.6rem);font-weight:700;line-height:1.06;letter-spacing:-.03em;max-width:18ch;margin:1rem auto 0}
  .pagehead .sub{margin-top:1.3rem}

  /* service sections */
  .svc-band{padding:clamp(4rem,9vw,7rem) 1.4rem;text-align:center}
  .svc-band.alt{background:var(--alt)}
  .svc-band.dark{background:var(--dark);color:#f5f5f7}
  .svc-band.dark .sub{color:var(--dark-grey)}
  .svc-band .spec{
    display:flex;gap:.6rem 2.2rem;justify-content:center;flex-wrap:wrap;
    margin-top:1.8rem;font-size:.9rem;color:var(--grey);
  }
  .svc-band.dark .spec{color:var(--dark-grey)}
  .svc-band .spec span::before{content:"·";margin-right:2.2rem;color:var(--hair)}
  .svc-band .spec span:first-child::before{content:none;margin:0}
  .svc-band h2{font-size:clamp(2rem,5vw,3.2rem);font-weight:700}
  .svc-band .eyebrow{color:var(--accent-text)}

  /* faq */
  .faq{border-top:1px solid var(--hair);margin-top:3rem;text-align:left}
  .faq details{border-bottom:1px solid var(--hair)}
  .faq summary{
    cursor:pointer;list-style:none;
    display:flex;justify-content:space-between;align-items:center;gap:1.5rem;
    padding:1.5rem .2rem;
    font-size:1.15rem;font-weight:600;letter-spacing:-.015em;
  }
  .faq summary::-webkit-details-marker{display:none}
  .faq summary::after{content:"+";font-weight:300;font-size:1.6rem;color:var(--grey2);flex:none;transition:transform .25s ease}
  .faq details[open] summary::after{transform:rotate(45deg)}
  .faq .a{padding:0 .2rem 1.6rem;color:var(--grey);max-width:62ch;font-size:1.02rem}

  /* contact */
  .contact-info{display:flex;gap:clamp(1.5rem,5vw,3.5rem);justify-content:center;flex-wrap:wrap;margin-top:2.6rem}
  .ci{text-align:center}
  .ci .k{font-size:.75rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--grey2)}
  .ci .v{font-size:1.15rem;font-weight:600;margin-top:.3rem;letter-spacing:-.015em}
  .ci .v a:hover{color:var(--accent-text)}
  form.mock{max-width:560px;margin:3rem auto 0;display:flex;flex-direction:column;gap:.9rem;text-align:left}
  form.mock label{display:flex;flex-direction:column;gap:.35rem;font-size:.8rem;font-weight:600;color:var(--grey)}
  form.mock input,form.mock textarea,form.mock select{
    background:var(--alt);border:1px solid transparent;border-radius:12px;
    color:var(--ink);font-family:inherit;font-size:1.02rem;letter-spacing:-.011em;
    padding:.85rem 1rem;
    transition:border-color .2s ease,background .2s ease;
  }
  form.mock input:focus,form.mock textarea:focus,form.mock select:focus{outline:none;background:#fff;border-color:var(--grey2)}
  .formrow{display:grid;gap:.9rem}
  @media(min-width:600px){.formrow{grid-template-columns:1fr 1fr}}
  form.mock .pill{align-self:center;margin-top:.8rem}

  /* footer */
  footer.site{background:var(--alt);color:var(--grey);font-size:.78rem}
  .foot{max-width:1024px;margin:0 auto;padding:2.6rem 1.4rem 1.2rem;display:grid;gap:1.8rem}
  @media(min-width:820px){.foot{grid-template-columns:2fr 1fr 1fr 1.3fr}}
  .foot h4{font-size:.78rem;font-weight:600;color:var(--ink);margin-bottom:.7rem}
  .foot ul{list-style:none;display:flex;flex-direction:column;gap:.45rem}
  .foot a:hover{color:var(--ink);text-decoration:underline}
  .foot .blurb{max-width:36ch;margin-top:.6rem;line-height:1.6}
  .legal{max-width:1024px;margin:0 auto;border-top:1px solid var(--hair);padding:1rem 1.4rem 1.4rem;display:flex;flex-wrap:wrap;gap:.6rem 2rem;justify-content:space-between;color:var(--grey2)}

  /* detector assembly (scrollytelling) */
  .asm-wrap{height:460vh;position:relative;background:var(--bg)}
  .asm-stage{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.1rem;overflow:hidden;padding:1rem;text-align:center}
  .asm-stage svg{width:min(85vw,430px);height:auto;overflow:visible;flex:none}
  .asm-stage .asm-h{font-size:clamp(1.7rem,3.8vw,2.5rem);font-weight:700;line-height:1.1}
  .asm-cap{min-height:1.5em;font-size:1.08rem;color:var(--grey);max-width:34em;transition:opacity .25s ease}
  #asm-cta,#asm2-cta{opacity:0;pointer-events:none;transition:opacity .5s ease}
  #asm-cta.show,#asm2-cta.show{opacity:1;pointer-events:auto}
  @media(prefers-reduced-motion:reduce){.asm-wrap{height:auto}.asm-stage{position:static;height:auto;padding:4rem 1.4rem}}

  /* motion */
  .reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.6,.2,1),transform .8s cubic-bezier(.2,.6,.2,1)}
  .reveal.in{opacity:1;transform:none}
  @media(prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none}
    html{scroll-behavior:auto}
    .pill{transition:none}
  }
  .note{font-size:.8rem;color:var(--grey2);font-style:italic;margin-top:1.6rem}

  /* photos */
  .photo{display:block;width:100%;border-radius:28px}
  .photo-cap{font-size:.85rem;color:var(--grey2);margin-top:.9rem}
  .photo-grid{display:grid;gap:1rem;margin-top:2.2rem}
  @media(min-width:700px){.photo-grid{grid-template-columns:1.6fr 1fr;align-items:stretch}.photo-grid .photo{height:100%;object-fit:cover}}
  .svc-band .photo,.svc-band .photo-grid{margin-top:2.4rem}

  /* illustrations */
  .ill{width:68px;height:68px;display:block;margin:0 auto .3rem}
  .svc-band .ill{width:84px;height:84px;margin-bottom:1rem}
  .rail .card .ill2{width:52px;height:52px;display:block;margin-bottom:1rem}
/* ---- mobile / accessibility improvements (Sep 2026) ---- */
  html{scroll-padding-top:64px}
  .skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--ink);color:#fff;
    padding:.8rem 1.2rem;border-radius:0 0 12px 0;font-size:.9rem;font-weight:600}
  .skip:focus{left:0}

  /* single-row scrolling nav on phones, bigger tap targets */
  @media(max-width:760px){
    .navwrap{gap:.5rem;padding:.5rem .9rem}
    .navwrap > .pill.small{display:none}
    nav.pages{
      flex-wrap:nowrap;overflow-x:auto;gap:.05rem;
      -ms-overflow-style:none;scrollbar-width:none;
      margin-right:-.9rem;padding-right:.9rem;
      -webkit-overflow-scrolling:touch;
    }
    nav.pages::-webkit-scrollbar{display:none}
    nav.pages a{flex:none;font-size:.86rem;padding:.6rem .62rem}
    .foot ul{gap:.15rem}
    .foot li a{display:inline-block;padding:.4rem 0}
    .faq summary{padding:1.25rem .2rem;min-height:56px}
    /* shorter scroll stages so the animations don't dominate a phone screen */
    .asm-wrap{height:290vh}
    .reveal{transform:translateY(14px)}
    .hero{padding-top:clamp(3.4rem,11vw,5.5rem)}
  }

  /* fixed tap-to-call bar on phones */
  .callbar{display:none}
  @media(max-width:760px){
    .callbar{
      display:flex;gap:.55rem;position:fixed;left:0;right:0;bottom:0;z-index:80;
      padding:.6rem .8rem calc(.6rem + env(safe-area-inset-bottom));
      background:rgba(255,255,255,.92);
      backdrop-filter:saturate(180%) blur(20px);
      -webkit-backdrop-filter:saturate(180%) blur(20px);
      border-top:1px solid rgba(0,0,0,.08);
    }
    .callbar a{
      flex:1;display:flex;align-items:center;justify-content:center;gap:.45rem;
      min-height:46px;border-radius:980px;font-size:.92rem;font-weight:600;
      letter-spacing:-.01em;padding:.5rem .8rem;
    }
    .callbar .cb-call{background:var(--ink);color:#fff}
    .callbar .cb-quote{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--hair)}
    .callbar svg{flex:none}
    body{padding-bottom:74px}
  }

  /* assurance strip */
  .assure{border-top:1px solid var(--hair);border-bottom:1px solid var(--hair)}
  .assure .inner{display:grid;gap:1.5rem 2.2rem;padding:2rem 1.4rem;grid-template-columns:1fr;text-align:left}
  @media(min-width:640px){.assure .inner{grid-template-columns:1fr 1fr}}
  @media(min-width:960px){.assure .inner{grid-template-columns:repeat(4,1fr);gap:2rem}}
  .assure .a{display:flex;gap:.7rem;align-items:flex-start}
  .assure .a svg{flex:none;width:22px;height:22px;margin-top:.1rem}
  .assure .a .t{font-weight:600;font-size:.95rem;letter-spacing:-.015em}
  .assure .a .d{color:var(--grey);font-size:.85rem;line-height:1.45;margin-top:.2rem}

  /* next steps list */
  .steps{list-style:none;max-width:560px;margin:2.2rem auto 0;text-align:left;
    display:flex;flex-direction:column;gap:.9rem;counter-reset:s}
  .steps li{display:flex;gap:.85rem;align-items:flex-start;color:var(--grey);font-size:1rem;line-height:1.5}
  .steps li::before{counter-increment:s;content:counter(s);
    flex:none;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;
    font-size:.78rem;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:.1rem}
  .steps b{color:var(--ink);font-weight:600}

  /* ---- live enquiry form (Sep 2026) ---- */
  .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
  .formnote{font-size:.85rem;text-align:center;margin-top:.3rem;min-height:1.2em;color:var(--grey)}
  .formnote.err{color:#B3261E;font-weight:500}
  form.mock button[disabled]{opacity:.55;cursor:default}
  .sent{text-align:center;padding:2.5rem 1rem;max-width:560px;margin:3rem auto 0}
  .sent strong{display:block;font-size:1.45rem;font-weight:700;letter-spacing:-.022em;color:var(--ink)}
  .sent p{margin-top:.7rem;color:var(--grey);font-size:1.02rem;line-height:1.5}
  .sent a{color:var(--accent-text);font-weight:600;white-space:nowrap}
  .sent a:hover{text-decoration:underline}
  .sent .tick{width:46px;height:46px;margin:0 auto 1.1rem;border-radius:50%;background:var(--brand);
    display:flex;align-items:center;justify-content:center}