:root{
  --bg:#0A1626;
  --bg-alt:#0D2038;
  --bg-card:#132A44;
  --ink:#F4F6F9;
  --ink-soft:#B7C3D1;
  --ink-dim:#7C8CA6;
  --line:#1F3049;
  --line-soft:#16263B;
  --teal:#2E67E8;
  --teal-deep:#1E4FC7;
  --teal-dim:#173B8F;
  --glow:rgba(46,103,232,0.14);
  /* Lighter accent used only for small blue text/labels sitting directly on
     dark backgrounds, where --teal alone falls short of 4.5:1 contrast. */
  --teal-on-dark:#6FA8FF;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Iowan Old Style','Georgia',serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.nav-brand,.btn,.stat-num,.card-num{
  font-family:'Helvetica Neue',Arial,sans-serif;
}
a{color:inherit;text-decoration:none;}
/* Sticky header offset: anchor-linked sections (e.g. #measurement, #evaluation)
   land below the fixed nav instead of underneath it. */
section[id]{scroll-margin-top:88px;}
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
.nav-cta:focus-visible,
.menu-toggle:focus-visible,
.mobile-nav-close:focus-visible,
.nav-wordmark-link:focus-visible,
.nav-links a:focus-visible{
  outline:2px solid var(--teal);outline-offset:3px;border-radius:2px;
}
img{max-width:100%;display:block;}
/* Shared 1200px content measure with responsive gutters, matching the
   Science & Validation page's grid, so every page shares the same edges. */
.wrap{max-width:none;padding-inline:max(clamp(22px,4.2vw,64px), calc((100% - 1200px) / 2));position:relative;}

/* Nav — scoped to the site's own header only, so nested <header> elements
   used as section headers elsewhere on the page (e.g. inside the platform
   and performance graphics) never inherit sticky/backdrop nav styling. */
header.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(10,22,38,0.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
nav{display:flex;align-items:center;justify-content:space-between;padding:12px 0;}
.nav-brand{font-weight:700;font-size:16px;letter-spacing:0.02em;color:var(--ink);display:flex;align-items:center;}
.nav-brand span{color:var(--teal);}

/* Approved company logo: serif "Nano", separate blue dot, HEALTH SYSTEMS lettering.
   Distinct from the NANO(TM) product wordmark used inside Technology content. */
.brand-logo{display:flex;align-items:center;gap:8px;}
.brand-logo .brand-word{
  font-family:Georgia,'Iowan Old Style','Times New Roman',serif;
  font-size:20px;color:var(--ink);line-height:1;
}
.brand-logo .brand-dot{
  width:5px;height:5px;border-radius:50%;background:var(--teal);
  margin-top:7px;flex:none;
}
.brand-logo .brand-sub{
  font-family:'Helvetica Neue',Arial,sans-serif;
  font-size:10.5px;letter-spacing:0.1em;color:var(--ink);font-weight:700;
}
.nav-links{display:flex;gap:26px;font-family:'Helvetica Neue',Arial,sans-serif;font-size:14px;}
.nav-links a{color:var(--ink-soft);border-bottom:1px solid transparent;padding-bottom:3px;}
.nav-links a:hover,.nav-links a.active{color:var(--ink);border-color:var(--teal);}
.nav-cta{
  font-family:'Helvetica Neue',Arial,sans-serif;font-size:13px;font-weight:600;
  background:var(--teal);color:#FFFFFF;padding:10px 18px;border-radius:3px;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--teal-deep);}
.menu-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--ink);line-height:1;padding:4px;}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* NANO Immersion nav wordmark: light (currentColor) letterforms + brand-blue dot,
   sized and aligned to match the other nav items. Logo + "Immersion" always
   sit on a single line, sized to the surrounding text. */
.nav-wordmark-link{
  display:inline-flex;align-items:center;gap:0.28em;flex-wrap:nowrap;white-space:nowrap;
  color:var(--ink-soft);border-bottom:1px solid transparent;padding-bottom:3px;
}
.nav-wordmark-link:hover,.nav-wordmark-link.active{color:var(--ink);border-color:var(--teal);}
.nav-wordmark-mark{display:inline-flex;align-items:center;flex:none;color:currentColor;}
.nav-wordmark-svg{display:block;flex:none;width:2.9em;height:0.75em;color:currentColor;}
.nav-wordmark-text{display:inline-block;white-space:nowrap;}

/* Mobile nav panel (populated via JS from the desktop nav-links) */
.mobile-nav{
  display:none;position:fixed;inset:0;z-index:100;background:rgba(6,13,24,0.6);
}
.mobile-nav.is-open{display:block;}
.mobile-nav-panel{
  position:absolute;top:0;right:0;height:100%;width:min(78vw,320px);
  background:var(--bg-alt);border-left:1px solid var(--line);
  padding:22px 26px;display:flex;flex-direction:column;gap:22px;
  box-shadow:-16px 0 40px rgba(0,0,0,0.35);
}
.mobile-nav-close{
  align-self:flex-end;background:none;border:none;color:var(--ink);font-size:24px;cursor:pointer;padding:4px;line-height:1;
}
.mobile-nav-links{display:flex;flex-direction:column;gap:2px;font-family:'Helvetica Neue',Arial,sans-serif;}
.mobile-nav-links a{
  color:var(--ink-soft);font-size:17px;padding:12px 0;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:0.3em;flex-wrap:nowrap;white-space:nowrap;
}
.mobile-nav-links a.active,.mobile-nav-links a:hover{color:var(--ink);}
.mobile-nav-links .nav-wordmark-svg{width:2.9em;height:0.75em;}
.mobile-nav-cta{margin-top:4px;}
body.nav-open{overflow:hidden;}

/* Hero */
.hero{position:relative;padding:96px 0 68px;border-bottom:1px solid var(--line);overflow:hidden;}
.hero-art{
  position:absolute;top:-40px;right:-60px;width:520px;height:520px;
  opacity:0.9;pointer-events:none;
}
.hero-eyebrow{
  font-family:'Helvetica Neue',Arial,sans-serif;font-size:13px;color:var(--teal-on-dark);
  font-weight:600;margin-bottom:18px;letter-spacing:0.02em;
}
.hero h1{
  font-size:44px;line-height:1.16;font-weight:400;max-width:760px;
  letter-spacing:-0.01em;position:relative;z-index:2;color:var(--ink);
}
.hero h1 em{font-style:normal;color:var(--teal);}
.hero p{font-size:18px;color:var(--ink-soft);max-width:580px;margin-top:22px;position:relative;z-index:2;}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;position:relative;z-index:2;}
.btn{
  font-size:14px;font-weight:600;padding:13px 24px;border-radius:3px;
  display:inline-block;
}
.btn-primary{background:var(--teal);color:#FFFFFF;}
.btn-primary:hover{background:var(--teal-deep);}
.btn-ghost{border:1px solid var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--teal-on-dark);color:var(--teal-on-dark);}

.stat-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);margin-top:56px;border:1px solid var(--line);
  position:relative;z-index:2;
}
.stat{background:var(--bg);padding:22px 20px;}
.stat-num{font-size:15px;font-weight:700;color:var(--teal-on-dark);}
.stat-label{font-size:12px;color:var(--ink-dim);margin-top:6px;text-transform:uppercase;letter-spacing:0.04em;}

/* Section shell */
section.page{padding:76px 0;border-bottom:1px solid var(--line);position:relative;}
section.page.alt{background:var(--bg-alt);}
section.page.tight{padding:60px 0;}
.section-tag{
  font-family:'Helvetica Neue',Arial,sans-serif;font-size:13px;color:var(--teal-on-dark);
  font-weight:600;margin-bottom:14px;
}
.section-title{font-size:clamp(26px, 2.6vw, 34px);font-weight:600;letter-spacing:-0.02em;max-width:640px;line-height:1.22;color:var(--ink);}
.section-lede{font-size:17px;color:var(--ink-soft);max-width:640px;margin-top:16px;}

.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px;}
.card{
  background:var(--bg-card);border:1px solid var(--line);padding:24px;border-radius:4px;
}
section.page.alt .card{background:#152E4A;}
.card-icon{width:30px;height:30px;margin-bottom:14px;color:var(--teal);}
.card-num{font-size:12px;color:var(--teal-on-dark);font-weight:700;margin-bottom:10px;}
.card h3{font-family:'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:600;margin-bottom:8px;color:var(--ink);}
.card p{font-size:14.5px;color:var(--ink-soft);}

.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:44px;align-items:start;}
.split h3{font-family:'Helvetica Neue',Arial,sans-serif;font-size:15px;font-weight:600;margin-bottom:10px;color:var(--teal);}
.split p{font-size:15px;color:var(--ink-soft);}

.flow{display:flex;gap:16px;margin-top:40px;flex-wrap:wrap;}
.flow-step{flex:1;min-width:150px;border-top:2px solid var(--teal);padding-top:14px;}
.flow-step .icon{width:26px;height:26px;color:var(--teal);margin-bottom:10px;}
.flow-step h4{font-family:'Helvetica Neue',Arial,sans-serif;font-size:14.5px;font-weight:600;margin:6px 0 6px;color:var(--ink);}
.flow-step p{font-size:13.5px;color:var(--ink-soft);}

.evidence-list{margin-top:40px;border-top:1px solid var(--line);}
.evidence-row{
  display:grid;grid-template-columns:180px 1fr;gap:24px;padding:20px 0;
  border-bottom:1px solid var(--line);
}
.evidence-row .tag{
  font-family:'Helvetica Neue',Arial,sans-serif;font-size:12px;font-weight:700;
  color:var(--teal-on-dark);text-transform:uppercase;letter-spacing:0.03em;align-self:start;
}
.evidence-row p{font-size:15px;color:var(--ink-soft);}
.evidence-row strong{color:var(--ink);font-weight:600;}

.pull{
  font-size:22px;font-style:italic;color:var(--ink);max-width:640px;margin:44px 0 0;
  border-left:3px solid var(--teal);padding-left:22px;
}

.app-list{margin-top:40px;display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}
.app-row{
  display:grid;grid-template-columns:200px 1fr auto;gap:24px;align-items:center;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.app-row h4{font-family:'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:600;color:var(--ink);}
.app-row p{font-size:14.5px;color:var(--ink-soft);}
.app-row a{font-family:'Helvetica Neue',Arial,sans-serif;font-size:13px;font-weight:600;color:var(--teal);white-space:nowrap;}

.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:40px;}
.spec-grid .card h3{font-size:14px;}

/* Photo / figure blocks */
.figure{
  margin-top:44px;border-radius:6px;overflow:hidden;border:1px solid var(--line);
  position:relative;background:var(--bg-card);
}
.figure img{width:100%;height:340px;object-fit:cover;filter:saturate(0.9) brightness(0.75);}
.figure figcaption{
  font-family:'Helvetica Neue',Arial,sans-serif;font-size:12.5px;color:var(--ink-dim);
  padding:12px 16px;border-top:1px solid var(--line);
}
.figure-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px;}
.figure-grid .figure{margin-top:0;}
.figure-grid img{height:220px;}

/* Particle distribution chart (SVG) */
.chart-block{margin-top:44px;background:var(--bg-card);border:1px solid var(--line);padding:28px;border-radius:6px;}
.chart-block svg{width:100%;height:auto;}
.chart-legend{display:flex;gap:24px;margin-top:14px;font-family:'Helvetica Neue',Arial,sans-serif;font-size:12px;color:var(--ink-dim);}
.chart-legend span{display:inline-flex;align-items:center;gap:6px;}
.chart-legend i{width:8px;height:8px;border-radius:50%;background:var(--teal);display:inline-block;}

/* Circulation diagram */
.circ-block{margin-top:44px;}
.circ-diagram{
  background:var(--bg-card);border:1px solid var(--line);border-radius:6px;
  padding:26px 26px 20px;display:flex;gap:22px;align-items:center;
}
.circ-diagram svg{width:100%;height:auto;display:block;}
.circ-svg-desktop,.circ-svg-mobile{flex:1 1 0;min-width:0;}
.circ-svg-mobile{display:none;}
.circ-callout{
  flex:0 0 220px;
  background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:18px 20px;
}
.circ-callout h4{font-family:'Helvetica Neue',Arial,sans-serif;font-size:13.5px;font-weight:700;color:var(--teal);margin-bottom:8px;}
.circ-callout p{font-family:'Helvetica Neue',Arial,sans-serif;font-size:13px;color:var(--ink-soft);line-height:1.5;}
.circ-steps{
  margin-top:26px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
  list-style:none;
}
.circ-steps li{display:flex;gap:14px;align-items:flex-start;}
.circ-steps .num{
  flex:none;width:26px;height:26px;border-radius:50%;background:var(--teal);color:#fff;
  font-family:'Helvetica Neue',Arial,sans-serif;font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.circ-steps h4{font-family:'Helvetica Neue',Arial,sans-serif;font-size:14.5px;font-weight:600;color:var(--ink);margin-bottom:4px;}
.circ-steps p{font-size:13.5px;color:var(--ink-soft);}
.circ-operate{font-family:'Helvetica Neue',Arial,sans-serif;font-size:14.5px;color:var(--ink-soft);margin-top:24px;max-width:640px;}
.circ-caption{font-family:'Helvetica Neue',Arial,sans-serif;font-size:12.5px;font-style:italic;color:var(--ink-dim);margin-top:14px;}

/* Wave divider */
.wave-divider{display:block;width:100%;height:48px;color:var(--line);}

/* Closing CTA */
.faq-list{margin-top:36px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{list-style:none;cursor:pointer;padding:22px 0;display:flex;justify-content:space-between;align-items:center;gap:20px;font-family:'Helvetica Neue',Arial,sans-serif;font-size:17px;font-weight:600;color:var(--ink);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:22px;font-weight:400;line-height:1;color:var(--teal);flex-shrink:0;}
.faq-item[open] summary::after{content:"–";}
.faq-item summary:focus-visible{outline:2px solid var(--teal);outline-offset:4px;}
.faq-answer{padding:0 0 26px;max-width:720px;font-size:16px;line-height:1.65;color:var(--ink-soft);}
.faq-answer p+p{margin-top:14px;}
.faq-answer a{color:var(--teal);font-weight:600;}
.faq-answer a:hover{color:var(--teal-deep);}

.closing{padding:88px 0;background:#071021;color:var(--ink);border-top:1px solid var(--line);}
.closing .section-tag{color:var(--teal-on-dark);}
.closing h2{font-size:clamp(28px, 2.8vw, 36px);font-weight:600;letter-spacing:-0.02em;max-width:600px;}
.closing p{font-size:16px;color:var(--ink-soft);max-width:520px;margin-top:16px;}
.closing .hero-actions{margin-top:32px;}

footer{padding:40px 0;font-family:'Helvetica Neue',Arial,sans-serif;font-size:14px;color:var(--ink-dim);background:#071021;}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
footer .flinks{display:flex;gap:20px;}
footer a:hover{color:var(--teal);}

@media (max-width:820px){
  .card-grid{grid-template-columns:1fr 1fr;}
  .spec-grid{grid-template-columns:1fr 1fr;}
  .split{grid-template-columns:1fr;gap:28px;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .figure-grid{grid-template-columns:1fr;}
  .hero-art{width:360px;height:360px;top:-20px;right:-100px;opacity:0.6;}
  .circ-diagram{flex-direction:column;}
  .circ-callout{flex-basis:auto;width:100%;}
  .circ-steps{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .nav-links{display:none;}
  .menu-toggle{display:block;}
  .hero h1{font-size:30px;}
  .card-grid{grid-template-columns:1fr;}
  .spec-grid{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .app-row{grid-template-columns:1fr;}
  .evidence-row{grid-template-columns:1fr;}
  .nav-cta{display:none;}
  .hero-art{display:none;}
  .circ-svg-desktop{display:none;}
  .circ-svg-mobile{display:block;}
  .circ-diagram{padding:20px 18px 16px;}
  .circ-steps{grid-template-columns:1fr;}
}

/* Approved Nano Health Systems logo, light treatment for the navy header (same artwork, blue dot kept) */
.nav-brand .brand-img{height:32px;width:auto;display:block;}
@media (max-width:640px){.nav-brand .brand-img{height:26px;}}
header.site-header nav.wrap{padding-top:16px;padding-bottom:16px;}

/* ---------- NANO product mark (approved artwork, see #nano-mark sprite) ----------
   Letterforms take the surrounding text color (light on dark, dark on light);
   the center dot stays brand blue. Sized so the letterforms match cap height,
   and kept on one line with "Immersion" / "Connect". */
.nano-mark-sprite{position:absolute;width:0;height:0;overflow:hidden;}
.nano-name{white-space:nowrap;}
.nano-mark{display:inline-block;height:.75em;width:2.898em;vertical-align:baseline;color:inherit;overflow:visible;}
.nano-mark--tm{width:2.993em;}
/* Small uppercase labels: neutral letterforms, descriptor keeps the label color */
.nano-mark--label{color:var(--ink);}
.nano-connect-word{color:var(--nano-connect-accent,#2463d7);}
/* "Connect" accent on dark sections uses the Connect page's light blue */
.ni-athlete,.na-standard,.tech-connect{--nano-connect-accent:#6FA8FF;}
/* Section label lockup, matching the NANO Connect page product label */
.section-tag.nano-connect-lockup,body .section-tag.nano-connect-lockup{text-transform:none;letter-spacing:0;font-size:20px;font-weight:400;line-height:1.3;}
.nano-connect-lockup .nano-connect-name{display:inline-flex;align-items:center;gap:.32em;color:var(--ink);}
.nano-connect-lockup .nano-mark{height:1em;width:3.864em;}