:root{
    --white:#FFFFFF; --soft:#F5F5F4; --charcoal:#2B2B2E; --grey:#8A898C; --grey-mid:#6E6D70;
    --accent:#E4432F; --accent-soft:#FDE8E5;
  }
  *{box-sizing:border-box;}
  html{scroll-padding-top:88px;}
  body{
    margin:0;background:var(--white);color:var(--charcoal);
    font-family:'Helvetica Neue',Helvetica,Arial,-apple-system,BlinkMacSystemFont,sans-serif;
    line-height:1.6;-webkit-font-smoothing:antialiased;
    padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
    overflow-x:hidden;
  }
  h1,h2,h3{font-weight:700;letter-spacing:-0.01em;margin:0;}
  a{color:inherit;text-decoration:none;} img,svg{max-width:100%;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
  .icon{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;flex-shrink:0;}
  .eyebrow{font-weight:600;font-size:0.82rem;text-transform:none;color:var(--accent);margin-bottom:16px;}

  /* ---- Nav ---- */
  /* seamless navbar: sits over the hero (no band), turns frosted once the page scrolls */
  header{position:sticky;top:env(safe-area-inset-top,0px);margin-bottom:-84px;z-index:50;background:rgba(255,255,255,0.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:background .25s ease,box-shadow .25s ease;}
  html.nav-js header:not(.scrolled){background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;}
  header.scrolled{background:rgba(255,255,255,0.88);box-shadow:0 1px 0 rgba(43,43,46,0.06);}
  nav.wrap{display:flex;align-items:center;justify-content:space-between;height:84px;}
  .logo{font-weight:700;font-size:1.15rem;letter-spacing:0.02em;display:flex;align-items:center;gap:10px;}
  .logo img{height:36px;width:auto;display:block;}
  .nav-links{display:flex;gap:36px;list-style:none;margin:0;padding:0;}
  .nav-links a{position:relative;font-size:0.95rem;color:var(--grey);transition:color .15s,font-weight .15s;}
  .nav-links a.active{color:var(--charcoal);font-weight:700;}
  .nav-links a.active::after{content:"";position:absolute;left:50%;bottom:-14px;transform:translateX(-50%);width:5px;height:5px;border-radius:50%;background:var(--accent);}
  .burger{display:none;background:none;border:none;cursor:pointer;padding:0;position:relative;width:36px;height:36px;flex-shrink:0;}
  .burger span{position:absolute;left:7px;display:block;width:22px;height:2px;background:var(--charcoal);transition:transform .25s ease,opacity .2s ease;}
  .burger span:nth-child(1){top:13px;} .burger span:nth-child(2){top:18px;} .burger span:nth-child(3){top:23px;}
  .burger.open span:nth-child(1){transform:translateY(5px) rotate(45deg);}
  .burger.open span:nth-child(2){opacity:0;}
  .burger.open span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}
  .mobile-menu{position:absolute;top:66px;right:32px;background:var(--white);box-shadow:0 14px 32px rgba(0,0,0,0.12);border-radius:12px;padding:8px;min-width:170px;display:flex;flex-direction:column;gap:2px;opacity:0;transform:translateY(-6px) scale(0.98);pointer-events:none;transition:opacity .18s ease,transform .18s ease;}
  .mobile-menu.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto;}
  .mobile-menu a{display:block;border-radius:8px;padding:10px 14px;font-size:0.92rem;color:var(--charcoal);}
  .mobile-menu a:hover{background:var(--soft);}

  /* ---- Hero ---- */
  .hero{padding:204px 0 100px;scroll-margin-top:-88px;text-align:center;position:relative;overflow:hidden;}
  .hero::before{content:"";position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:640px;height:640px;background:radial-gradient(circle,var(--accent-soft) 0%,rgba(253,232,229,0) 70%);pointer-events:none;z-index:0;}
  .hero::after{
    content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
    background:url("assets/circuit.svg") center top / 240px 240px repeat;
    opacity:.5;
    -webkit-mask-image:linear-gradient(to bottom,transparent 0,transparent 56px,#000 170px),radial-gradient(ellipse 75% 75% at 50% 45%,transparent 28%,#000 65%,transparent 100%);
    -webkit-mask-composite:source-in;
            mask-image:linear-gradient(to bottom,transparent 0,transparent 56px,#000 170px),radial-gradient(ellipse 75% 75% at 50% 45%,transparent 28%,#000 65%,transparent 100%);
            mask-composite:intersect;
  }
  .hero-inner{max-width:820px;margin:0 auto;position:relative;z-index:1;}
  .hero-mark{width:14px;height:14px;background:var(--accent);border-radius:50%;margin:0 auto 28px;}
  .hero h1{font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.05;margin-bottom:40px;}
  .checklist{list-style:none;margin:0 auto 44px;padding:0;display:flex;flex-direction:column;gap:14px;align-items:center;}
  .checklist li{display:flex;align-items:center;gap:10px;font-size:1rem;color:var(--charcoal);}
  .checklist .icon{width:18px;height:18px;color:var(--accent);}
  .hero p.lede{color:var(--grey-mid);font-size:1.05rem;max-width:52ch;margin:0 auto;}

  /* ---- Section pattern ---- */
  .section{padding:110px 0;}
  .section-alt{background:var(--soft);}
  .section-head{max-width:60ch;margin-bottom:56px;}
  .section-head h2{font-size:clamp(1.9rem,3.6vw,2.8rem);}
  .section-head p{color:var(--grey-mid);margin:18px 0 0;max-width:56ch;}

  /* ---- About (clean) ---- */
  .about-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:64px;align-items:center;}
  .tagline{font-size:clamp(1.5rem,3.2vw,2.3rem);font-weight:700;color:var(--accent);max-width:22ch;margin:0 0 24px;line-height:1.3;letter-spacing:-0.01em;}
  .about-lede{font-size:1.05rem;line-height:1.75;color:var(--charcoal);max-width:52ch;margin:0;}
  .about-panel{background:var(--soft);border-radius:24px;padding:44px;}
  .about-panel-stat span{display:block;font-size:2.6rem;font-weight:700;color:var(--accent);line-height:1;margin-bottom:10px;}
  .about-panel-stat p{margin:0;color:var(--grey-mid);font-size:0.92rem;max-width:32ch;line-height:1.5;}
  .about-panel-stat{padding:22px 0;}
  .about-panel-stat:first-child{padding-top:0;}
  .about-panel-stat:last-child{padding-bottom:0;}
  .about-panel-divider{height:1px;background:rgba(43,43,46,0.08);}

  /* ---- Agents carousel (fully expanded) ---- */
  .agents-track{display:flex;align-items:stretch;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 16px;-webkit-overflow-scrolling:touch;scrollbar-width:none;}
  .agents-track::-webkit-scrollbar{display:none;}
  .agent-card{flex:0 0 auto;width:270px;scroll-snap-align:start;background:var(--white);border:1px solid rgba(43,43,46,0.09);border-radius:20px;padding:30px;display:flex;flex-direction:column;}
  .agent-icon{width:46px;height:46px;border-radius:13px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;margin-bottom:20px;}
  .agent-icon .icon{color:var(--accent);width:22px;height:22px;}
  .agent-card h3{font-size:1.05rem;line-height:1.3;margin-bottom:12px;}
  .agent-card p{color:var(--grey-mid);font-size:0.92rem;line-height:1.65;margin:0 0 20px;flex:1;}
  .agent-card .learn{color:var(--accent);font-weight:700;font-size:0.88rem;display:inline-flex;align-items:center;gap:6px;}
  .agent-card .learn span{transition:transform .2s ease;}
  .agent-card .learn:hover span{transform:translateX(3px);}

  /* ---- Method steps ---- */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;}
  .step .num{display:block;font-size:3rem;font-weight:700;color:var(--accent);opacity:0.85;line-height:1;margin-bottom:18px;}
  .step h3{font-size:1.2rem;margin-bottom:10px;}
  .step p{color:var(--grey-mid);font-size:0.96rem;margin:0;}

  /* ---- Contact ---- */
  .contact-grid{display:grid;grid-template-columns:0.85fr 1.15fr;gap:64px;align-items:start;}
  .contact-copy h2{font-size:clamp(1.9rem,3.6vw,2.6rem);margin:0 0 18px;}
  .contact-copy p{color:var(--grey-mid);margin:0;max-width:44ch;}
  .contact-form{max-width:none;margin:0;background:var(--white);box-shadow:0 20px 50px rgba(0,0,0,0.08);padding:44px;}
  form{display:grid;gap:20px;}
  .field-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
  label{display:block;font-size:0.85rem;font-weight:700;margin-bottom:8px;}
  input,textarea{width:100%;border:none;background:var(--soft);color:var(--charcoal);padding:15px 16px;font-family:inherit;font-size:0.95rem;}
  input::placeholder,textarea::placeholder{color:var(--grey);}
  input:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:0;}
  textarea{resize:vertical;min-height:120px;}
  .submit-btn{justify-self:start;background:var(--accent);color:var(--white);border:none;padding:15px 30px;font-size:0.95rem;font-weight:700;cursor:pointer;font-family:inherit;}
  .submit-btn:hover{opacity:0.88;}
  .submit-btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}

  /* ---- Footer ---- */
  footer{padding:90px 0 40px;}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;margin-bottom:64px;}
  .foot-brand .logo{margin-bottom:18px;display:flex;}
  .foot-brand p{color:var(--grey-mid);max-width:34ch;margin:0;font-size:0.95rem;}
  .foot-grid h4{font-size:0.9rem;font-weight:700;margin:0 0 20px;}
  .foot-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;}
  .foot-grid li a{font-size:0.94rem;color:var(--grey-mid);}
  .foot-grid li a:hover{color:var(--charcoal);}
  .foot-contact-item{display:flex;gap:10px;align-items:flex-start;}
  .foot-contact-item .icon{width:16px;height:16px;margin-top:3px;color:var(--accent);}
  .foot-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;padding-top:32px;font-size:0.85rem;color:var(--grey-mid);}
  .foot-bottom .links{display:flex;gap:24px;}
  .foot-bottom .links a:hover{color:var(--accent);}

  /* ---- Decoration (subtle) ---- */
  .eyebrow::before{content:"";display:inline-block;width:22px;height:2px;border-radius:2px;background:currentColor;vertical-align:middle;margin-right:10px;}
  .hero-mark{position:relative;}
  .hero-mark::after{content:"";position:absolute;inset:-5px;border:1.5px solid var(--accent);border-radius:50%;animation:markRing 2.8s ease-out infinite;}
  @keyframes markRing{from{opacity:.55;transform:scale(1);}to{opacity:0;transform:scale(2.8);}}
  .section-alt{background:var(--soft) radial-gradient(rgba(43,43,46,0.07) 1px,transparent 1.3px) 0 0/22px 22px;}
  .step{position:relative;padding-top:26px;border-top:1px solid rgba(43,43,46,0.1);}
  .step::before{content:"";position:absolute;top:-1px;left:0;width:48px;height:3px;background:var(--accent);border-radius:2px;}
  .agents-track{padding:10px 6px 24px;}
  .agent-card{position:relative;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;}
  .agent-card::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .3s ease;}
  .agent-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(0,0,0,0.08);border-color:rgba(43,43,46,0.16);}
  .agent-card:hover::before{transform:scaleX(1);}
  .agent-icon{background:linear-gradient(135deg,var(--accent-soft),#fff);border:1px solid var(--accent-soft);}
  .about-panel{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--soft),#fff 120%);border:1px solid rgba(43,43,46,0.06);}
  .about-panel::before{content:"";position:absolute;top:0;right:0;width:220px;height:220px;background:url("assets/circuit.svg") right top/240px 240px no-repeat;opacity:.4;pointer-events:none;
    -webkit-mask-image:radial-gradient(circle at 100% 0,#000 0,transparent 70%);mask-image:radial-gradient(circle at 100% 0,#000 0,transparent 70%);}
  .about-panel>*{position:relative;}
  .contact-form{border-top:3px solid var(--accent);}
  footer{position:relative;}
  footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(43,43,46,0.18),transparent);}

  /* scroll reveal (JS adds .js to <html>) */
  html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
  html.js .reveal.in{opacity:1;transform:none;}

  @media (max-width:900px){
    .nav-links{display:none;} .burger{display:block;}
    .card-grid{grid-template-columns:1fr;} .steps{grid-template-columns:1fr;gap:44px;}
    .about-grid{grid-template-columns:1fr;gap:32px;}
    .contact-grid{grid-template-columns:1fr;gap:40px;} .contact-form{padding:32px 24px;} .field-row{grid-template-columns:1fr;}
    .foot-grid{grid-template-columns:1fr;gap:40px;}
    .section{padding:76px 0;} .hero{padding:172px 0 64px;}
    .hero::after{opacity:.4;background-size:180px 180px;}
  }
  @media (prefers-reduced-motion:reduce){ .hero::after{background-image:url("assets/circuit-static.svg");opacity:.28;} .about-panel::before{background-image:url("assets/circuit-static.svg");} .hero-mark::after{animation:none;opacity:0;} .agent-card,.agent-card::before{transition:none;} }