:root{
  --navy:#041c38;
  --navy-2:#062b55;
  --blue:#0b69a9;
  --cyan:#19b5d1;
  --teal:#18a69d;
  --green:#24b56e;
  --gold:#f4b81d;
  --ink:#102238;
  --muted:#5e7187;
  --line:#dce7f0;
  --bg:#f6f9fc;
  --white:#fff;
  --shadow:0 22px 60px rgba(4,28,56,.12);
  --radius:24px;
  --radius-sm:16px;
  --max:1200px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
ul{padding-left:1.1rem}
.container{width:min(var(--max), calc(100% - 40px));margin-inline:auto}
.narrow{width:min(860px, calc(100% - 40px));margin-inline:auto}
.section{padding:100px 0}
.section-dark{background:linear-gradient(135deg,var(--navy),#063d6b 65%,#0a4c71);color:#fff}
.section-tinted{background:linear-gradient(180deg,#f8fbfd,#eff6fa)}
.section-kicker{
  display:inline-block;
  margin-bottom:12px;
  text-transform:uppercase;
  letter-spacing:.18em;
  font-weight:800;
  font-size:.76rem;
  color:var(--teal);
}
.section-kicker.light{color:#78e2dc}
h1,h2,h3,h4,p{margin-top:0}
h1,h2,h3,h4{line-height:1.12}
h1{font-size:clamp(3rem,7vw,6.7rem);letter-spacing:-.045em;margin-bottom:22px}
h2{font-size:clamp(2.2rem,4.5vw,4rem);letter-spacing:-.035em;margin-bottom:20px}
h3{font-size:1.35rem}
h4{font-size:1rem;color:var(--blue);margin-bottom:14px}
.skip-link{
  position:fixed;left:12px;top:-80px;z-index:9999;
  padding:10px 14px;background:#fff;color:#000;border-radius:8px;
  box-shadow:var(--shadow);transition:top .2s ease
}
.skip-link:focus{top:12px}

.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.9);
  border-bottom:1px solid rgba(8,53,91,.08);
  backdrop-filter:blur(16px);
}
.nav-wrap{
  width:min(var(--max), calc(100% - 32px));margin:auto;
  min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px
}
.brand img{width:190px;height:56px;object-fit:contain;object-position:left center}
.main-nav{display:flex;align-items:center;gap:28px;font-size:.92rem;font-weight:700;color:#26425f}
.main-nav a{position:relative;padding:27px 0}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:19px;width:0;height:2px;
  background:linear-gradient(90deg,var(--blue),var(--green));transition:.25s
}
.main-nav a:hover::after,.main-nav a:focus-visible::after{width:100%}
.menu-toggle{display:none;background:transparent;border:0;padding:8px;cursor:pointer}
.menu-toggle span{display:block;width:26px;height:2px;background:var(--navy);margin:6px 0;transition:.25s}

.hero{position:relative;overflow:hidden;min-height:760px;display:grid;align-items:center}
.hero::after{
  content:"";position:absolute;inset:auto -12% -34% auto;width:600px;height:600px;
  border:1px solid rgba(255,255,255,.16);border-radius:50%;
  box-shadow:0 0 0 60px rgba(255,255,255,.025),0 0 0 120px rgba(255,255,255,.018)
}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:70px;position:relative;z-index:2}
.hero h1 span{
  background:linear-gradient(90deg,#64e1dc,#53d28a 70%,#f4c444);
  -webkit-background-clip:text;background-clip:text;color:transparent
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.78rem;text-transform:uppercase;letter-spacing:.18em;font-weight:800;color:#9deee9
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--gold)}
.hero-lead{font-size:clamp(1.05rem,2vw,1.35rem);max-width:780px;color:#d9edf8}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:50px;padding:0 22px;border-radius:999px;font-weight:800;
  border:1px solid transparent;transition:.25s ease
}
.btn-primary{background:linear-gradient(90deg,var(--cyan),var(--green));color:#05243f;box-shadow:0 12px 30px rgba(16,173,171,.24)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.06)}
.btn-ghost:hover{background:rgba(255,255,255,.11)}
.hero-logo-card{
  padding:28px;border-radius:30px;background:rgba(255,255,255,.96);
  box-shadow:0 30px 90px rgba(0,0,0,.25);transform:rotate(1deg)
}
.hero-logo-card img{width:100%;border-radius:18px}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(12px);opacity:.18}
.orb-a{width:360px;height:360px;background:#22d3c3;top:80px;right:16%}
.orb-b{width:220px;height:220px;background:#f2b71b;left:-80px;bottom:60px}
.dna-line{position:absolute;width:520px;height:2px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);transform:rotate(-18deg)}
.dna-a{top:30%;left:8%}.dna-b{bottom:22%;right:8%;transform:rotate(24deg)}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);width:26px;height:42px;border:1px solid rgba(255,255,255,.35);border-radius:18px}
.scroll-hint span{position:absolute;width:4px;height:8px;border-radius:99px;background:#fff;left:10px;top:8px;animation:scrollDot 1.8s infinite}
@keyframes scrollDot{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(17px)}}

.intro{text-align:center}
.intro-text{font-size:1.22rem;color:var(--muted);margin:0 auto}

.section-head{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:44px}
.section-head>div{max-width:760px}
.section-head>p{max-width:360px;color:var(--muted);margin-bottom:6px}

.focus-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.focus-card{
  min-height:210px;padding:26px;border:1px solid var(--line);border-radius:22px;background:#fff;
  display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 12px 34px rgba(6,43,85,.06);
  transition:.25s ease;position:relative;overflow:hidden
}
.focus-card::before{
  content:"";position:absolute;inset:auto -25% -45% auto;width:150px;height:150px;border-radius:50%;
  background:linear-gradient(135deg,rgba(25,181,209,.16),rgba(36,181,110,.16))
}
.focus-card:hover{transform:translateY(-7px);box-shadow:var(--shadow)}
.focus-card h3{margin:0;position:relative;z-index:1}
.icon-wrap{
  width:58px;height:58px;border-radius:18px;display:grid;place-items:center;
  background:linear-gradient(135deg,#e8f6fb,#e8f8ef);color:var(--blue);font-size:.86rem;font-weight:900;letter-spacing:.04em
}

.research-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.research-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;
  box-shadow:0 15px 40px rgba(4,28,56,.06);overflow:hidden
}
.research-number{
  position:absolute;top:16px;right:18px;font-size:2rem;font-weight:900;color:rgba(6,105,169,.1)
}
.research-card h3{font-size:1.32rem;margin-bottom:7px;padding-right:42px}
.research-card .meta{font-size:.9rem;color:var(--muted);min-height:44px}
.research-card ul{margin:0;color:#415770}
.research-card li+li{margin-top:8px}

.model-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.model-copy>p{color:var(--muted);font-size:1.08rem}
.model-list{display:grid;gap:12px;margin-top:28px}
.model-list div{
  padding:15px 17px;border-left:3px solid var(--teal);background:#f8fbfd;border-radius:0 12px 12px 0
}
.model-list strong{display:block;color:var(--navy);margin-bottom:2px}
.model-list span{color:var(--muted);font-size:.92rem}

.model-visual{
  position:relative;aspect-ratio:1/1;max-width:560px;margin:auto;border-radius:50%;
  background:radial-gradient(circle,#0e416c 0 24%,#e8f5fa 25% 40%,transparent 41%),
             conic-gradient(from -20deg,#6ad5ca,#1aa9bd,#2f7ab6,#72bb62,#efb935,#28a58d,#6ad5ca);
  box-shadow:inset 0 0 0 18px #fff,0 28px 70px rgba(4,28,56,.14)
}
.brain-core{
  position:absolute;inset:36%;border-radius:50%;background:#fff;display:grid;place-items:center;
  font-weight:900;font-size:.85rem;letter-spacing:.12em;color:var(--navy);box-shadow:0 10px 24px rgba(0,0,0,.15)
}
.node{
  position:absolute;padding:9px 13px;background:#fff;border-radius:999px;box-shadow:0 8px 22px rgba(0,0,0,.13);
  font-size:.78rem;font-weight:800;color:var(--navy);white-space:nowrap
}
.n1{top:7%;left:38%}.n2{top:27%;right:-2%}.n3{bottom:19%;right:2%}.n4{bottom:4%;left:36%}.n5{bottom:23%;left:-5%}.n6{top:25%;left:-4%}

.book{padding:105px 0;overflow:hidden;position:relative}
.book::before{
  content:"";position:absolute;inset:0;background:
  linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:34px 34px;mask-image:linear-gradient(to right,transparent,black,transparent)
}
.book-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:65px;align-items:center;position:relative}
.book-image-wrap{position:relative}
.book-image-wrap img{width:100%;border-radius:24px;box-shadow:0 30px 70px rgba(0,0,0,.38);border:1px solid rgba(255,255,255,.16)}
.book-badge{
  position:absolute;z-index:2;top:18px;left:18px;background:#fff;color:var(--navy);font-weight:900;
  font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;padding:10px 14px;border-radius:999px
}
.book-copy h2{font-size:clamp(2.1rem,4vw,4rem)}
.prenatal-pill{
  display:inline-flex;padding:10px 15px;border-radius:10px;background:var(--gold);color:#0b2440;
  font-weight:900;text-transform:uppercase;letter-spacing:.06em;margin:8px 0 18px
}
.book-copy h3{font-size:1.45rem;color:#d7f4f4;font-weight:700}
.author{font-size:1.35rem;font-weight:900;text-transform:uppercase;letter-spacing:.035em;margin-top:28px;margin-bottom:2px}
.author-meta{color:#8edbe0;text-transform:uppercase;letter-spacing:.09em;font-size:.82rem}
.topic-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.topic-cloud span{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);padding:8px 12px;border-radius:999px;font-size:.86rem}

.prenatal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.mini-card{
  min-height:128px;padding:22px;border:1px solid var(--line);border-radius:18px;background:#fff;
  display:flex;gap:16px;align-items:flex-start;box-shadow:0 12px 34px rgba(4,28,56,.05)
}
.mini-card span{font-size:.82rem;color:var(--teal);font-weight:900}
.mini-card p{margin:0;font-weight:750}

.folate-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:70px}
.folate-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.folate-list div{
  padding:17px 18px;background:#fff;border:1px solid var(--line);border-radius:14px;
  font-weight:700;color:#2e4862
}

.quote-section{padding:100px 0;text-align:center}
.quote-mark{font-family:Georgia,serif;font-size:7rem;line-height:.5;color:var(--gold);opacity:.9}
blockquote{margin:20px auto 0;font-size:clamp(2rem,4.5vw,4rem);font-weight:850;line-height:1.12;letter-spacing:-.03em;max-width:980px}

.closing-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:center}
.closing-logo{width:100%;max-width:520px;border-radius:20px}
.closing-copy p{text-transform:uppercase;letter-spacing:.12em;color:var(--muted);font-weight:700}
.closing-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.closing-tags span{padding:9px 12px;border-radius:999px;background:#eef7f8;color:#1c5b65;font-weight:800;font-size:.84rem}

.site-footer{background:#03162c;color:#cfe1ed;padding:25px 0}
.site-footer .container{display:flex;align-items:center;justify-content:space-between}
.site-footer p{margin:0;font-weight:800}
.back-top{
  display:grid;place-items:center;width:42px;height:42px;border-radius:50%;
  border:1px solid rgba(255,255,255,.2);transition:.2s
}
.back-top:hover{background:rgba(255,255,255,.08)}

.reveal{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s cubic-bezier(.2,.65,.3,1)}
.js .reveal.is-visible{opacity:1;transform:none}
.delay-1{transition-delay:.08s}.delay-2{transition-delay:.16s}.delay-3{transition-delay:.24s}.delay-4{transition-delay:.32s}

@media (max-width:1050px){
  .main-nav{gap:16px;font-size:.84rem}
  .focus-grid{grid-template-columns:repeat(3,1fr)}
  .research-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid,.book-grid,.model-grid,.closing-grid{gap:45px}
}
@media (max-width:820px){
  .section{padding:78px 0}
  .menu-toggle{display:block}
  .main-nav{
    position:absolute;top:78px;left:16px;right:16px;display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:13px 12px;border-radius:10px}
  .main-nav a:hover{background:#f4f8fb}
  .main-nav a::after{display:none}
  .menu-toggle.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .menu-toggle.active span:nth-child(2){opacity:0}
  .menu-toggle.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

  .hero{min-height:auto;padding:82px 0 100px}
  .hero-grid,.model-grid,.book-grid,.closing-grid,.folate-grid{grid-template-columns:1fr}
  .hero-logo-card{max-width:620px}
  .section-head{align-items:flex-start;flex-direction:column;gap:10px}
  .section-head>p{max-width:700px}
  .model-visual{width:min(540px,90vw)}
  .book-image-wrap{max-width:760px;margin:auto}
  .folate-grid{gap:28px}
}
@media (max-width:620px){
  .container,.narrow{width:min(100% - 26px, var(--max))}
  .section{padding:64px 0}
  .brand img{width:150px;height:50px}
  .nav-wrap{min-height:70px}
  .main-nav{top:70px}
  .hero{padding-top:66px}
  h1{font-size:clamp(2.7rem,15vw,4.3rem)}
  h2{font-size:clamp(2rem,10vw,3rem)}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn{width:100%}
  .focus-grid,.research-grid,.prenatal-grid,.folate-list{grid-template-columns:1fr}
  .focus-card{min-height:160px}
  .model-visual{width:94vw;max-width:440px}
  .node{font-size:.64rem;padding:7px 10px}
  .n2{right:-1%}.n5{left:-1%}.n6{left:-1%}
  .book-badge{position:static;display:inline-flex;margin-bottom:12px}
  .book-image-wrap img{border-radius:18px}
  .closing-copy{text-align:center}
  .closing-tags{justify-content:center}
}

@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}