:root{
  --ink:#0f1d1a;
  --ink-2:#24332f;
  --muted:#64736f;
  --line:#dbe4e1;
  --paper:#ffffff;
  --soft:#f3f7f5;
  --brand:#1d6b55;
  --brand-2:#2c8b6c;
  --accent:#b7d9c9;
  --dark:#10241e;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{width:min(1160px,calc(100% - 40px));margin:0 auto}

.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(15,29,26,.08);
}
.nav-wrap{
  height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px
}
.brand{display:flex;align-items:center;gap:14px;min-width:260px}
.brand-mark{
  font-family:"Manrope",sans-serif;font-weight:800;letter-spacing:.08em;
  background:var(--dark);color:#fff;padding:9px 11px;border-radius:8px
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;font-size:13px}
.brand-text strong{font-weight:700}
.brand-text span{color:var(--muted);margin-top:3px}
.main-nav{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:600}
.main-nav a{position:relative}
.main-nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-7px;height:2px;background:var(--brand);
  transition:.2s ease
}
.main-nav a:hover::after{right:0}
.menu-toggle{display:none;border:0;background:transparent;font-size:26px;cursor:pointer}

.hero{
  position:relative;overflow:hidden;
  min-height:690px;
  display:flex;align-items:center;
  background:
    radial-gradient(circle at 75% 30%,rgba(183,217,201,.45),transparent 34%),
    linear-gradient(135deg,#f7faf8 0%,#eef5f1 52%,#f9fbfa 100%);
}
.hero-grid{
  position:absolute;inset:0;opacity:.35;
  background-image:
    linear-gradient(rgba(29,107,85,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(29,107,85,.08) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:linear-gradient(to right,transparent,black 30%,black 100%);
}
.hero-content{
  position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:80px;align-items:center;
  padding:90px 0;
}
.eyebrow{
  margin:0 0 18px;font-size:12px;font-weight:800;letter-spacing:.18em;color:var(--brand);
}
.eyebrow.dark{color:var(--brand)}
.hero h1,h2,h3{font-family:"Manrope",sans-serif;letter-spacing:-.025em}
.hero h1{
  font-size:clamp(42px,5.3vw,72px);line-height:1.04;margin:0 0 24px;max-width:850px
}
.hero-lead{font-size:19px;max-width:750px;color:var(--ink-2);margin:0 0 34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 20px;border-radius:8px;font-size:14px;font-weight:700;
  transition:.2s ease
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--dark);transform:translateY(-1px)}
.btn-secondary{border:1px solid #acc5bb;background:rgba(255,255,255,.65)}
.btn-secondary:hover{background:#fff}
.btn-light{background:#fff;color:var(--dark);width:max-content}

.hero-panel{position:relative;min-height:390px}
.science-card{
  position:absolute;inset:70px 10px 30px 40px;
  background:rgba(16,36,30,.96);color:#fff;border-radius:24px;
  padding:42px;box-shadow:0 32px 80px rgba(16,36,30,.22);
  display:flex;flex-direction:column;justify-content:flex-end
}
.science-kicker{font-weight:800;letter-spacing:.18em;font-size:13px;color:var(--accent);margin-bottom:auto}
.science-card strong{font-family:"Manrope";font-size:31px;line-height:1.12;max-width:360px}
.science-card p{color:#c9d8d2;font-size:14px}
.molecule{position:absolute;border-radius:50%;border:1px solid rgba(29,107,85,.35)}
.molecule::before,.molecule::after{content:"";position:absolute;border-radius:50%;background:var(--brand-2)}
.molecule-a{width:130px;height:130px;right:10px;top:15px}
.molecule-a::before{width:18px;height:18px;left:22px;top:18px}
.molecule-a::after{width:11px;height:11px;right:20px;bottom:28px}
.molecule-b{width:82px;height:82px;left:0;bottom:25px}
.molecule-b::before{width:13px;height:13px;right:14px;top:8px}

.quick-stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stats-grid>div{padding:28px 24px;border-right:1px solid var(--line)}
.stats-grid>div:first-child{padding-left:0}
.stats-grid>div:last-child{border-right:0}
.stats-grid strong{display:block;font-size:14px;margin-bottom:5px}
.stats-grid span{display:block;color:var(--muted);font-size:12px}

.section{padding:110px 0}
.soft{background:var(--soft)}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;align-items:start}
h2{font-size:clamp(34px,4vw,52px);line-height:1.1;margin:0}
.text-block{font-size:17px;color:var(--ink-2)}
.text-block p:first-child{margin-top:0}
.text-link{display:inline-block;margin-top:15px;color:var(--brand);font-weight:700}
.section-heading{max-width:760px;margin-bottom:48px}
.section-heading h2{margin-bottom:18px}
.section-heading>p:last-child{color:var(--muted);font-size:17px}

.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.research-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;min-height:250px;
  transition:.2s ease
}
.research-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(16,36,30,.08)}
.card-num{font-size:12px;color:var(--brand);font-weight:800;letter-spacing:.12em}
.research-card h3{font-size:21px;margin:52px 0 10px}
.research-card p{color:var(--muted);font-size:14px;margin:0}

.dark-section{background:var(--dark);color:#fff}
.section-heading.light .eyebrow{color:var(--accent)}
.section-heading.light h2{color:#fff}
.featured-project{
  border:1px solid rgba(255,255,255,.16);border-radius:22px;overflow:hidden;
  background:
    radial-gradient(circle at 85% 10%,rgba(44,139,108,.34),transparent 34%),
    #17362d;
}
.project-badge{
  padding:16px 24px;border-bottom:1px solid rgba(255,255,255,.12);
  color:var(--accent);font-size:11px;font-weight:800;letter-spacing:.18em
}
.project-content{
  display:grid;grid-template-columns:1fr 1.1fr auto;gap:40px;align-items:end;padding:48px
}
.project-content h3{font-size:50px;margin:0}
.project-subtitle{margin:4px 0 0;color:#c9d8d2}
.project-content>p{color:#dce8e3;margin:0}

.publication{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:28px 0;display:grid;grid-template-columns:160px 1fr;gap:30px
}
.publication>span{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--brand)}
.publication h3{margin:0 0 5px;font-size:21px}
.publication p{margin:0;color:var(--muted)}

.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.person-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.avatar{
  width:84px;height:84px;border-radius:50%;display:grid;place-items:center;
  background:var(--soft);border:1px dashed #abc4ba;color:var(--brand);font-size:28px
}
.person-card h3{margin:18px 0 6px}
.person-card p{margin:0;color:var(--muted);font-size:14px}

.contact-section{background:#fbfcfb}
.contact-grid{display:grid;grid-template-columns:1fr .95fr;gap:80px;align-items:start}
.contact-grid>div:first-child>p:last-child{color:var(--muted);font-size:17px;max-width:600px}
.contact-card{border:1px solid var(--line);border-radius:16px;background:#fff;padding:10px 28px}
.contact-row{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.contact-row:last-child{border-bottom:0}
.contact-row span{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.08em}
.contact-row strong{font-size:14px}

.site-footer{background:#0b1713;color:#d7e1dd;padding:34px 0}
.footer-wrap{display:flex;justify-content:space-between;gap:30px;align-items:center}
.footer-wrap>div{display:flex;flex-direction:column}
.footer-wrap strong{font-family:"Manrope";letter-spacing:.1em}
.footer-wrap span,.footer-wrap p{font-size:12px;color:#a9bbb4;margin:0}

@media (max-width:980px){
  .menu-toggle{display:block}
  .main-nav{
    display:none;position:absolute;top:82px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;padding:24px 30px;border-bottom:1px solid var(--line)
  }
  .main-nav.open{display:flex}
  .hero-content{grid-template-columns:1fr;gap:20px}
  .hero-panel{min-height:330px}
  .science-card{inset:20px 40px 20px 40px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid>div{border-bottom:1px solid var(--line)}
  .cards-grid{grid-template-columns:repeat(2,1fr)}
  .split,.contact-grid{grid-template-columns:1fr;gap:35px}
  .project-content{grid-template-columns:1fr;align-items:start}
}

@media (max-width:640px){
  .container{width:min(100% - 28px,1160px)}
  .brand-text{display:none}
  .nav-wrap{height:70px}
  .main-nav{top:70px}
  .hero{min-height:auto}
  .hero-content{padding:70px 0 55px}
  .hero h1{font-size:42px}
  .hero-lead{font-size:17px}
  .hero-panel{min-height:300px}
  .science-card{inset:20px 0;padding:30px}
  .science-card strong{font-size:27px}
  .stats-grid{grid-template-columns:1fr}
  .stats-grid>div{padding:22px 0;border-right:0}
  .section{padding:75px 0}
  .cards-grid,.team-grid{grid-template-columns:1fr}
  .project-content{padding:30px 24px}
  .project-content h3{font-size:42px}
  .publication{grid-template-columns:1fr;gap:8px}
  .contact-row{grid-template-columns:1fr;gap:5px}
  .footer-wrap{flex-direction:column;align-items:flex-start}
}