/* ============================================================
   Airopath — Enterprise WLAN Consulting & Engineering
   Palette: ink navy (brand) / paper / signal blue
   Type: Space Grotesk (display) · IBM Plex Sans (body) · IBM Plex Mono (spec)
   ============================================================ */

:root{
  --ink:#0A1322;
  --ink-2:#0E1A2E;
  --navy:#14243F;
  --signal:#38A0FF;
  --signal-bright:#6ABBFF;
  --signal-soft:#9FD1FF;
  --paper:#F5F8FC;
  --paper-2:#EAF0F8;
  --white:#FFFFFF;
  --body-ink:#182438;
  --slate:#4E5F78;
  --slate-soft:#8B99AD;
  --line:rgba(24,36,56,.13);
  --line-dark:rgba(245,248,252,.13);

  --font-display:"Space Grotesk",system-ui,sans-serif;
  --font-body:"IBM Plex Sans",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,monospace;

  --wrap:1200px;
  --pad:clamp(20px,5vw,56px);
  --radius:10px;
  --shadow:0 14px 34px rgba(10,19,34,.10);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  font-family:var(--font-body);
  color:var(--body-ink);
  background:var(--paper);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit}
:focus-visible{outline:3px solid var(--signal);outline-offset:3px;border-radius:2px}

.wrap{max-width:var(--wrap);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* ---------- utility bar ---------- */
.utility{
  background:#060D19;
  color:var(--slate-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.utility .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:9px;padding-bottom:9px}
.utility a{color:var(--signal-soft);text-decoration:none}
.utility a:hover{text-decoration:underline}
.utility .dot{color:var(--signal);padding:0 2px}
@media (max-width:680px){.utility .u-right{display:none}}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,19,34,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-dark);
}
.header .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:15px;padding-bottom:15px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--white)}
.brand svg{width:30px;height:30px;flex:none}
.brand .name{
  font-family:var(--font-display);
  font-weight:700;font-size:21px;letter-spacing:.15em;text-transform:uppercase;line-height:1;
}
.brand .name b{color:var(--signal);font-weight:700}
.nav{display:flex;align-items:center;gap:28px}
.nav a{
  color:#C4D2E6;text-decoration:none;font-size:15px;font-weight:500;
  position:relative;padding:5px 0;
}
.nav a:not(.btn)::after{
  content:"";position:absolute;left:0;bottom:-1px;height:2px;width:100%;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav a:not(.btn):hover{color:var(--white)}
.nav a:not(.btn):hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--white)}

.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-display);font-weight:600;
  font-size:15px;letter-spacing:.02em;text-decoration:none;
  padding:12px 22px;border-radius:8px;cursor:pointer;border:0;
  transition:transform .16s ease,background .16s ease,color .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.btn::after{content:"→";transition:transform .16s ease;font-family:var(--font-body)}
.btn:hover{transform:translateY(-1px)}
.btn:hover::after{transform:translateX(3px)}
.btn-signal{background:var(--signal);color:#04101F}
.btn-signal:hover{background:var(--signal-bright);box-shadow:0 8px 22px rgba(56,160,255,.35)}
.btn-ghost{border:1px solid rgba(159,209,255,.4);color:var(--white)}
.btn-ghost:hover{border-color:var(--signal);color:var(--signal-soft)}
.btn-ghost-dark{border:1px solid var(--line);color:var(--navy)}
.btn-ghost-dark:hover{border-color:var(--signal);color:#1B72C4}
.nav .btn{padding:10px 18px}
.nav .btn::after{content:"→"}

.nav-toggle{display:none;background:none;border:1px solid var(--line-dark);color:var(--white);border-radius:8px;padding:8px 12px;font-size:19px;line-height:1;cursor:pointer}
@media (max-width:940px){
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--ink);flex-direction:column;align-items:flex-start;padding:20px var(--pad) 26px;gap:18px;border-bottom:1px solid var(--line-dark);box-shadow:0 24px 40px rgba(0,0,0,.4)}
  .nav.open{display:flex}
  .nav-toggle{display:block}
}

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(1000px 520px at 82% -6%,rgba(56,160,255,.17),transparent 62%),
    radial-gradient(760px 480px at 4% 108%,rgba(56,160,255,.08),transparent 60%),
    var(--ink);
  color:var(--white);
  overflow:hidden;
  position:relative;
}
.hero::before{ /* RF propagation contours */
  content:"";position:absolute;right:-220px;top:-220px;width:860px;height:860px;
  border-radius:50%;pointer-events:none;
  background:repeating-radial-gradient(circle at center,
    rgba(56,160,255,.075) 0 1.5px,transparent 1.5px 64px);
  -webkit-mask-image:radial-gradient(circle at center,black 30%,transparent 72%);
  mask-image:radial-gradient(circle at center,black 30%,transparent 72%);
}
.hero .wrap{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  gap:clamp(28px,4vw,64px);align-items:center;
  padding-top:clamp(52px,7vw,100px);padding-bottom:clamp(44px,6vw,84px);
}
.eyebrow{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--signal);
  display:flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--signal);flex:none}
.eyebrow.on-light{color:#1B72C4}
.eyebrow.on-light::before{background:#1B72C4}
.hero .eyebrow{margin-bottom:22px}
.hero h1{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(36px,4.9vw,63px);line-height:1.04;letter-spacing:-.015em;
  margin-bottom:22px;
}
.hero h1 .accent{color:var(--signal-soft)}
.hero .lede{font-size:clamp(16.5px,1.5vw,19px);color:#B4C3D9;max-width:56ch;margin-bottom:32px}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-stats{
  display:flex;flex-wrap:wrap;
  border-top:1px solid var(--line-dark);padding-top:26px;
}
.stat{padding:0 clamp(20px,3vw,44px);border-left:1px solid var(--line-dark)}
.stat:first-child{border-left:none;padding-left:0}
.stat .n{
  font-family:var(--font-mono);font-weight:600;
  font-size:clamp(22px,2.4vw,30px);color:var(--white);line-height:1.15;
}
.stat .n em{color:var(--signal);font-style:normal}
.stat .l{font-size:12.5px;color:var(--slate-soft);letter-spacing:.04em;margin-top:3px}
@media (max-width:1020px){
  .hero .wrap{grid-template-columns:1fr}
  .globe-panel{order:-1;max-width:440px;margin:0 auto}
  .stat{padding:0 20px}
}
@media (max-width:640px){
  .hero-stats{gap:18px 0}
  .stat{width:50%;border-left:none;padding:0 0 0 0}
}

/* globe */
.globe-panel{display:flex;flex-direction:column;align-items:center;gap:18px;position:relative}
.globe-panel canvas{width:min(100%,540px);height:auto}
.globe-caption{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.09em;
  color:var(--slate-soft);text-transform:uppercase;
  display:flex;gap:22px;flex-wrap:wrap;justify-content:center;
  border:1px solid var(--line-dark);border-radius:999px;
  padding:9px 22px;background:rgba(6,13,25,.55);
}
.globe-caption .k{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.globe-caption .swatch{width:8px;height:8px;border-radius:50%;flex:none}
.globe-caption .swatch.hub{background:var(--signal);box-shadow:0 0 8px rgba(56,160,255,.9)}
.globe-caption .swatch.site{background:#EAF4FF}

/* ---------- section scaffolding ---------- */
.section{padding-top:clamp(60px,7.5vw,104px);padding-bottom:clamp(60px,7.5vw,104px);position:relative}
.section.dark{background:var(--ink);color:var(--white)}
.section.dark-2{background:var(--ink-2);color:var(--white)}
.section.paper-2{background:var(--paper-2)}
.section.white{background:var(--white)}
.section-head{max-width:840px;margin-bottom:clamp(34px,4.5vw,58px)}
.section-head h2{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(28px,3.3vw,42px);line-height:1.1;letter-spacing:-.012em;
  margin:14px 0 16px;
}
.section-head p{color:var(--slate);font-size:18px}
.section.dark .section-head p,.section.dark-2 .section-head p{color:#AFBFD6}

/* ---------- logo wall ---------- */
.logos{border-top:1px solid var(--line-dark);background:#060D19}
.logos .wrap{padding-top:30px;padding-bottom:34px}
.logos .label{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;
  color:#5E7292;text-align:center;margin-bottom:22px;
  display:flex;align-items:center;gap:18px;
}
.logos .label::before,.logos .label::after{content:"";height:1px;background:var(--line-dark);flex:1}
.logo-row{
  display:flex;flex-wrap:wrap;justify-content:center;align-items:center;
  gap:16px 38px;
}
.logo-row span{
  font-family:var(--font-display);font-weight:600;font-size:16.5px;letter-spacing:.09em;
  color:#7E90A9;text-transform:uppercase;white-space:nowrap;
  transition:color .2s ease;
}
.logo-row span:hover{color:#C4D2E6}

/* ---------- cards ---------- */
.grid{display:grid;gap:24px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:980px){.grid.cols-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:660px){.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px 24px;text-decoration:none;display:flex;flex-direction:column;gap:11px;
  position:relative;overflow:hidden;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--signal),rgba(56,160,255,0));
  opacity:0;transition:opacity .18s ease;
}
a.card:hover{transform:translateY(-4px);border-color:rgba(56,160,255,.55);box-shadow:var(--shadow)}
a.card:hover::before{opacity:1}
.card .k{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:#1B72C4;text-transform:uppercase;
}
.card h3{font-family:var(--font-display);font-weight:600;font-size:21px;line-height:1.22;color:var(--navy)}
.card p{color:var(--slate);font-size:15.5px}
.card .go{
  margin-top:auto;font-family:var(--font-display);font-weight:600;font-size:14.5px;color:#1B72C4;padding-top:10px;
  display:inline-flex;align-items:center;gap:7px;
}
.card .go::after{content:"→";transition:transform .16s ease}
a.card:hover .go::after{transform:translateX(4px)}

.section.dark .card,.section.dark-2 .card{
  background:rgba(255,255,255,.035);border-color:var(--line-dark);
}
.section.dark a.card:hover,.section.dark-2 a.card:hover{border-color:rgba(56,160,255,.6);box-shadow:0 16px 34px rgba(0,0,0,.35)}
.section.dark .card h3,.section.dark-2 .card h3{color:var(--white)}
.section.dark .card p,.section.dark-2 .card p{color:#AFBFD6}
.section.dark .card .k,.section.dark-2 .card .k{color:var(--signal)}
.section.dark .card .go,.section.dark-2 .card .go{color:var(--signal-soft)}

/* ---------- split / feature rows ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,76px);align-items:center}
@media (max-width:920px){.split{grid-template-columns:1fr}}
.split h2{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(26px,3vw,38px);line-height:1.12;letter-spacing:-.01em;margin:14px 0 16px;
}
.split p{color:var(--slate);margin-bottom:14px}
.section.dark .split p,.section.dark-2 .split p{color:#AFBFD6}

.checklist{list-style:none;margin:20px 0 8px}
.checklist li{
  padding-left:32px;position:relative;margin-bottom:12px;color:var(--body-ink);
}
.section.dark .checklist li,.section.dark-2 .checklist li{color:#D5E0EF}
.checklist li::before{
  content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;
  background:
    radial-gradient(circle at center,var(--signal) 0 3.5px,transparent 4.5px),
    radial-gradient(circle at center,transparent 0 6px,rgba(56,160,255,.5) 6.5px 7.5px,transparent 8px);
}

/* spec table (mono data) */
.spec{
  font-family:var(--font-mono);font-size:14px;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;background:var(--white);box-shadow:var(--shadow);
}
.spec .row{display:grid;grid-template-columns:auto 1fr;gap:14px;padding:14px 20px;border-bottom:1px solid var(--line)}
.spec .row:last-child{border-bottom:none}
.spec .row .k{color:var(--slate)}
.spec .row .v{color:var(--navy);font-weight:600;text-align:right}
.section.dark .spec,.section.dark-2 .spec{background:rgba(255,255,255,.035);border-color:var(--line-dark);box-shadow:none}
.section.dark .spec .row{border-color:var(--line-dark)}
.section.dark .spec .row .k{color:var(--slate-soft)}
.section.dark .spec .row .v{color:var(--signal-soft)}

/* ---------- process ---------- */
.process{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
@media (max-width:900px){.process{grid-template-columns:1fr}}
.step{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  position:relative;overflow:hidden;
}
.step::after{
  counter-increment:step;content:"0" counter(step);
  position:absolute;right:14px;top:2px;
  font-family:var(--font-mono);font-size:56px;font-weight:600;
  color:rgba(56,160,255,.10);line-height:1;
}
.step h3{font-family:var(--font-display);font-size:19px;font-weight:600;color:var(--navy);margin-bottom:9px;position:relative}
.step p{color:var(--slate);font-size:15.5px;position:relative}

/* ---------- case studies ---------- */
.case{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--white);
  padding:clamp(26px,3.2vw,40px);margin-bottom:26px;
  display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:clamp(22px,3vw,48px);
  box-shadow:var(--shadow);
}
@media (max-width:820px){.case{grid-template-columns:1fr}}
.case h3{font-family:var(--font-display);font-size:25px;font-weight:700;color:var(--navy);margin:10px 0 10px;line-height:1.2}
.case p{color:var(--slate);margin-bottom:10px}
.case .facts{border-left:1px solid var(--line);padding-left:26px}
@media (max-width:820px){.case .facts{border-left:none;padding-left:0;border-top:1px solid var(--line);padding-top:18px}}
.case .facts .f{margin-bottom:16px}
.case .facts .fk{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--slate-soft)}
.case .facts .fv{font-family:var(--font-mono);font-weight:600;font-size:15.5px;color:var(--navy);margin-top:2px}

/* ---------- placeholder flag ---------- */
.ph{
  display:inline-block;font-family:var(--font-mono);font-size:10.5px;font-weight:600;
  letter-spacing:.09em;text-transform:uppercase;color:#8A5A00;background:#FFF2D6;
  border:1px solid #EBCF96;border-radius:4px;padding:1px 7px;vertical-align:middle;margin-left:8px;
}
.hero .ph,.section.dark .ph,.section.dark-2 .ph{background:rgba(255,196,74,.13);color:#FFC44A;border-color:rgba(255,196,74,.38)}

/* ---------- quote ---------- */
.quote{position:relative;max-width:820px;padding-left:clamp(28px,4vw,54px)}
.quote::before{
  content:"\201C";position:absolute;left:0;top:-14px;
  font-family:var(--font-display);font-size:clamp(64px,7vw,96px);font-weight:700;
  color:var(--signal);opacity:.65;line-height:1;
}
.quote p{font-family:var(--font-display);font-size:clamp(20px,2.2vw,27px);line-height:1.42;color:var(--white);margin-bottom:16px}
.quote cite{font-style:normal;font-family:var(--font-mono);font-size:13px;color:var(--slate-soft)}

/* ---------- content pages ---------- */
.page-hero{
  background:
    radial-gradient(800px 380px at 85% -20%,rgba(56,160,255,.14),transparent 62%),
    var(--ink);
  color:var(--white);position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;right:-260px;top:-260px;width:720px;height:720px;
  border-radius:50%;pointer-events:none;
  background:repeating-radial-gradient(circle at center,rgba(56,160,255,.07) 0 1.5px,transparent 1.5px 58px);
  -webkit-mask-image:radial-gradient(circle at center,black 28%,transparent 70%);
  mask-image:radial-gradient(circle at center,black 28%,transparent 70%);
}
.page-hero .wrap{padding-top:clamp(44px,5.5vw,70px);padding-bottom:clamp(40px,5.5vw,62px);position:relative}
.page-hero h1{font-family:var(--font-display);font-weight:700;font-size:clamp(31px,4vw,50px);line-height:1.08;letter-spacing:-.012em;margin:16px 0 14px}
.page-hero .lede{color:#B4C3D9;max-width:64ch;font-size:17.5px}
.page-hero .eyebrow{margin-top:18px}
.crumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--slate-soft)}
.crumb a{color:var(--signal-soft);text-decoration:none}
.crumb a:hover{text-decoration:underline}

.prose{max-width:780px}
.prose h2{font-family:var(--font-display);font-weight:700;font-size:clamp(22px,2.5vw,30px);color:var(--navy);margin:38px 0 12px;letter-spacing:-.01em}
.prose h2:first-child{margin-top:0}
.prose p{margin-bottom:15px;color:var(--body-ink)}
.prose ul{margin:0 0 15px}
.prose a{color:#1B72C4}

/* ---------- forms ---------- */
.form{max-width:700px}
.form .field{margin-bottom:20px}
.form label{display:block;font-family:var(--font-display);font-weight:600;font-size:14.5px;color:var(--navy);margin-bottom:8px}
.form input,.form select,.form textarea{
  width:100%;font-family:var(--font-body);font-size:16px;color:var(--body-ink);
  background:var(--white);border:1px solid var(--line);border-radius:8px;padding:13px 15px;
  transition:border-color .15s ease,box-shadow .15s ease;
}
.form input:focus,.form select:focus,.form textarea:focus{
  outline:none;border-color:var(--signal);box-shadow:0 0 0 4px rgba(56,160,255,.18);
}
.form .hint{font-size:13.5px;color:var(--slate);margin-top:7px}

/* ---------- CTA band ---------- */
.cta-band{
  background:
    radial-gradient(900px 420px at 12% 130%,rgba(56,160,255,.2),transparent 60%),
    var(--navy);
  color:var(--white);position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-160px;bottom:-320px;width:640px;height:640px;
  border-radius:50%;pointer-events:none;
  background:repeating-radial-gradient(circle at center,rgba(56,160,255,.08) 0 1.5px,transparent 1.5px 52px);
  -webkit-mask-image:radial-gradient(circle at center,black 30%,transparent 72%);
  mask-image:radial-gradient(circle at center,black 30%,transparent 72%);
}
.cta-band .wrap{
  padding-top:clamp(52px,6.5vw,86px);padding-bottom:clamp(52px,6.5vw,86px);
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:30px;align-items:center;position:relative;
}
@media (max-width:820px){.cta-band .wrap{grid-template-columns:1fr}}
.cta-band h2{font-family:var(--font-display);font-weight:700;font-size:clamp(27px,3.2vw,40px);line-height:1.1;letter-spacing:-.012em;margin-bottom:12px}
.cta-band p{color:#B4C3D9;max-width:58ch}
.cta-band .mono{font-family:var(--font-mono);font-size:14px;color:var(--signal-soft);margin-top:12px}

/* ---------- footer ---------- */
.footer{background:#060D19;color:#9FB0C7;border-top:1px solid var(--line-dark)}
.footer .wrap{padding-top:56px;padding-bottom:36px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;margin-bottom:42px}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.footer h4{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.15em;text-transform:uppercase;color:#5E7292;margin-bottom:16px}
.footer a{color:#C4D2E6;text-decoration:none;display:block;margin-bottom:10px;font-size:15px}
.footer a:hover{color:var(--white)}
.footer .brand{margin-bottom:16px}
.footer .fine{
  border-top:1px solid var(--line-dark);padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:12px;color:#5E7292;letter-spacing:.04em;
}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}