:root{--bg:#fff;--soft:#f5f6f4;--ink:#161a17;--mute:#5c635e;--line:#e3e6e2;--g1:#1d3a2a;--g2:#4f7d57;--g3:#a9c7a2;--g4:#e4eddc;--r:8px}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"IBM Plex Sans",system-ui,sans-serif;font-size:18.5px;color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--g2);outline-offset:3px}
::selection{background:var(--g3);color:var(--g1)}
.wrap{max-width:1300px;margin:0 auto;padding:0 24px}

/* Nav */
nav{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:10;transition:box-shadow .3s}
nav.scrolled{box-shadow:0 4px 24px rgba(22,26,23,.07)}
nav .wrap{display:flex;justify-content:space-between;align-items:center;height:100px}
.logo img{height:65px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{font-size:17px;font-weight:500;color:var(--mute);padding:9px 16px;border-radius:999px;transition:background .2s,color .2s}
.nav-links a:hover{background:var(--soft);color:var(--ink)}
.nav-links a.nav-cta{margin-left:14px;background:#1c1f22;color:#fff;padding:10px 20px;font-size:15.5px}
.nav-links a.nav-cta:hover{background:var(--g1);color:#fff}
.nav-toggle{display:none}

/* Type */
.eyebrow{font-size:13.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute);margin-bottom:20px}
h1,h2{font-weight:600;letter-spacing:-.02em;line-height:1.12}
h1{font-size:clamp(34px,5vw,50.5px)}
h2{font-size:clamp(30px,4vw,42.5px)}
.lead{color:var(--mute);margin-top:20px}
section{padding:80px 0;scroll-margin-top:100px}
section + section:not(#contact){border-top:1px solid var(--line)}

/* Buttons */
.btn{font:inherit;font-size:15.5px;font-weight:500;padding:11px 18px;border-radius:var(--r);border:1px solid var(--line);background:var(--soft);cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
.btn.dark{background:#1c1f22;color:#fff;border-color:#1c1f22}
.btns{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}

/* Hero */
.hero{padding:35px 0 56px}
.hero-grid{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center}
.hero-grid img{width:400px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:48px}
.stat{background:var(--soft);border-radius:var(--r);padding:16px 18px;transition:transform .25s,box-shadow .25s}
.stat b{display:block;font-size:16.5px;font-weight:600}
.stat span{font-size:14.5px;color:var(--mute)}

/* Applications */
.rows{margin-top:40px;border-top:1px solid var(--line)}
.row{display:grid;grid-template-columns:240px 1fr;gap:32px;padding:28px 0;border-bottom:1px solid var(--line);transition:background .25s,padding .25s}
.tag{display:inline-block;font-size:12.5px;border:1px solid var(--line);border-radius:4px;padding:2px 7px;color:var(--mute);margin-bottom:8px;background:#fff}
.row h3{font-size:26.5px;font-weight:600}
.row h4{font-size:18.5px;font-weight:600}
.row p{font-size:16.5px;color:var(--mute);margin-top:4px}

/* Reactor slides */
.rx{margin-top:40px}
.rx-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.rx-tab{font:inherit;font-size:15.5px;font-weight:500;display:flex;align-items:center;gap:12px;padding:12px 16px;background:#fff;border:1px solid var(--line);border-radius:var(--r);color:var(--mute);cursor:pointer;text-align:left;transition:background .2s,border-color .2s,color .2s}
.rx-tab.active{background:var(--soft);border-color:#cfd4cd;color:var(--ink)}
.rx-n{width:24px;height:24px;flex:none;display:grid;place-items:center;font-size:12px;font-weight:500;background:#eceeed;border:1px solid #dcdfdb;border-radius:6px;color:var(--mute)}
.rx-tab.active .rx-n{background:#fff;color:var(--ink)}

.rx-slides{display:grid;margin-top:32px}
.rx-slide{grid-area:1/1;display:grid;grid-template-columns:1.2fr 1fr;gap:56px;align-items:center;opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s}
.rx-slide.active{opacity:1;visibility:visible}
.rx-slide img{width:100%;max-width:500px;display:block}
.rx-text h3{font-size:26.5px;font-weight:600;line-height:1.2;letter-spacing:-.01em}
.rx-intro{font-size:16px;color:var(--mute);margin-top:12px}
.rx-point{margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
.rx-point h4{font-size:17px;font-weight:600}
.rx-point p{font-size:16px;color:var(--mute);margin-top:2px}

.rx-pager{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:28px}
.rx-arrow{width:40px;height:40px;display:grid;place-items:center;font:inherit;font-size:20px;line-height:1;background:#fff;border:1px solid var(--line);border-radius:var(--r);color:var(--ink);cursor:pointer;transition:background .2s,opacity .2s}
.rx-arrow:disabled{opacity:.35;cursor:default}
.rx-count{font-size:14px;color:var(--mute);min-width:36px;text-align:center}

@media(hover:hover){
  .rx-tab:hover:not(.active){background:var(--soft)}
  .rx-arrow:not(:disabled):hover{background:var(--soft)}
}
@media(max-width:860px){
  .rx-slide{grid-template-columns:1fr;gap:28px}
  .rx-slide img{margin:0 auto}
}
@media(max-width:600px){

  .rx-tabs{
    gap:8px;
  }

  .rx-tab{
    flex-direction:row;
    gap:7px;
    padding:10px 8px;
    text-align:left;
    font-size:12.5px;
  }

}

/* Physics */
.physics{--set-gap:85px;display:flex;align-items:center;justify-content:flex-start;gap:24px var(--set-gap);margin:48px 0 32px;flex-wrap:wrap}
.pt{display:flex;flex-direction:column;align-items:center;align-self:flex-end;text-align:center;flex:none}
.dots{display:flex;align-items:flex-end;justify-content:center;margin-bottom:32px;transition:transform .3s;transform-origin:center}
.nuc{position:relative;flex:none}
.nuc i{position:absolute;width:44px;height:44px;border-radius:50%;background:var(--g3)}
.nuc i.n{background:var(--g2)}
.pt b{display:block;font-size:22.5px;font-weight:600}
.pt small{font-size:12.5px;letter-spacing:.08em;color:var(--mute);text-transform:uppercase}
.op{align-self:center;font-size:28px;line-height:1;color:var(--mute);flex:none}
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:40px}
.col{border-top:1px solid var(--line);padding-top:20px;transition:transform .25s,border-color .25s}
.col h3{font-size:34.5px;font-weight:600;letter-spacing:-.02em;background:linear-gradient(120deg,var(--g1),var(--g2));-webkit-background-clip:text;background-clip:text;color:transparent}
.col .tag{margin:12px 0 8px}
.col p{font-size:15.5px;color:var(--mute)}

/* Development */
.stages{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px}
.stage{border-top:1px solid var(--line);padding-top:16px;transition:transform .25s,border-color .25s}
.stage h4{font-size:22.5px;font-weight:600;line-height:1.2;margin:14px 0 8px;min-height:2.4em}
.stage p{font-size:15.5px;color:var(--mute)}

/* Contact */
#contact{position:relative;overflow:hidden;padding:70px 0;background:var(--g1);color:#fff}
#contact .wrap{position:relative;z-index:1}
#contact::before,#contact::after{content:"";position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.08);pointer-events:none}
#contact::before{width:620px;height:620px;left:-220px;bottom:-320px}
#contact::after{width:900px;height:900px;left:-360px;bottom:-460px}
.talk{display:grid;grid-template-columns:1fr 460px;gap:96px;align-items:start}
.talk p{color:rgba(255,255,255,.75);line-height:1.6;max-width:46ch;margin-top:28px}
#contact h2{margin-bottom:8px}
form{padding:26px;display:grid;gap:18px;align-content:start;border-radius:16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14)}
label{font-size:15.5px;font-weight:500;display:grid;gap:8px}
input,textarea{font:inherit;font-size:15.5px;color:#fff;padding:14px 16px;border:none;border-bottom:2px solid var(--g3);border-radius:6px 6px 0 0;background:rgba(255,255,255,.07);width:100%}
textarea{min-height:120px;resize:vertical}
input::placeholder,textarea::placeholder{color:rgba(255,255,255,.45)}
input:focus,textarea:focus{outline:none;border-bottom-color:#fff;background:rgba(255,255,255,.12)}
form .btn{margin-top:6px;padding:15px 18px;width:100%;background:#fff;color:var(--g1);border-color:#fff}
form .btn:hover{background:var(--g4)}

/* Scroll reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* Hover effects only on devices with a mouse */
@media(hover:hover){
  .btn:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,0,0,.12)}
  .btn.dark:hover{background:var(--g1);border-color:var(--g1)}
  .stat:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(29,58,42,.1)}
  .col:hover,.stage:hover{border-top-color:var(--g2);transform:translateY(-3px)}
  .row:hover{background:var(--soft);padding-left:16px;padding-right:16px}
  .pt:hover .dots{transform:scale(1.12)}
}

/* Large tablets and small laptops */
@media(max-width:1100px){
  .stages{grid-template-columns:repeat(2,1fr);gap:32px 24px}
  .stage h4{min-height:0}
  .talk{grid-template-columns:1fr 400px;gap:56px}
  .physics{--set-gap:40px}
}

/* Tablets and phones */
@media(max-width:860px){
  section{scroll-margin-top:88px}
  nav .wrap{height:76px}
  .logo img{height:52px}
  .nav-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;width:44px;height:44px;background:none;border:1px solid var(--line);border-radius:10px;cursor:pointer}
  .nav-toggle span{width:18px;height:2px;background:var(--ink);transition:transform .25s}
  nav.open .nav-toggle span:first-child{transform:translateY(4px) rotate(45deg)}
  nav.open .nav-toggle span:last-child{transform:translateY(-4px) rotate(-45deg)}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;padding:12px 20px 20px;background:#fff;border-bottom:1px solid var(--line)}
  nav.open .nav-links{display:flex}
  .nav-links a{padding:14px 16px}
  .nav-links a.nav-cta{margin:8px 0 0;text-align:center}
  .hero-grid,.tech,.talk,.row{grid-template-columns:1fr}
  .hero-grid{gap:32px}
  .hero-grid img{justify-self:center;width:min(400px,100%)}
  .tech img{margin:0 auto}
  .stats,.cols3{grid-template-columns:1fr}
  .row{gap:12px}
  .talk{gap:40px}
  #contact{padding:48px 0 52px}
  input,textarea{font-size:16px}
  .physics{flex-direction:column;align-items:center;gap:20px;margin:40px 0 24px}
  .pt{align-self:center}
  .dots{margin-bottom:16px}
  .op:nth-child(4){transform:rotate(90deg)}
}

/* Phones */
@media(max-width:600px){
  body{font-size:17px}
  .wrap{padding:0 20px}
  section{padding:48px 0}
  .hero{padding:24px 0 40px}
  .btn{min-height:44px}
  .btns .btn{flex:1 1 100%;text-align:center}
  .stages{grid-template-columns:1fr}
  .col h3{font-size:30px}
  #contact::before,#contact::after{display:none}
}

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