:root{
    --ink:#16191c; --ink-soft:#3d4248; --paper:#f4f1ea; --paper-deep:#ebe6db;
    --line:#d2ccbf; --accent:#6b4f2e; --night:#211a12; --night-text:#b3a78f;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{background:var(--paper);color:var(--ink);font-family:'Archivo',sans-serif;font-weight:300;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
  body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:9999;opacity:.025;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
  .wrap{max-width:1180px;margin:0 auto;padding:0 40px;}
  h1,h2,h3{font-family:'Archivo',sans-serif;font-weight:300;letter-spacing:-.025em;line-height:1.1;}
  .serif{font-family:'Fraunces',serif;font-style:italic;font-weight:300;letter-spacing:-.01em;}
  .eyebrow{font-family:'Archivo';font-weight:500;font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;color:var(--accent);}

  #nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:22px 40px;transition:all .5s ease;border-bottom:1px solid transparent;}
  #nav.scrolled{background:rgba(244,241,234,.9);backdrop-filter:blur(12px);padding:16px 40px;border-bottom:1px solid var(--line);}
  .logo{font-family:'Archivo';font-size:1.45rem;font-weight:500;letter-spacing:-.03em;color:var(--ink);text-decoration:none;}
  .logo span{font-family:'Fraunces';font-style:italic;font-weight:300;color:var(--accent);}
  .nav-links{display:flex;gap:34px;align-items:center;}
  .nav-links a{font-size:.82rem;color:var(--ink-soft);text-decoration:none;transition:color .3s;}
  .nav-links a:hover{color:var(--accent);}
  .nav-cta{font-size:.78rem!important;letter-spacing:.1em!important;text-transform:uppercase;border:1px solid var(--ink);padding:11px 22px;color:var(--ink)!important;transition:all .4s!important;}
  .nav-cta:hover{background:var(--ink);color:var(--paper)!important;}
  @media(max-width:760px){.nav-links a:not(.nav-cta){display:none;}}

  /* breadcrumb + hero */
  .ac-hero{position:relative;min-height:100vh;display:flex;align-items:flex-end;overflow:hidden;}
  .ac-hero img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 30%;}
  .ac-hero .scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(33,26,18,.55) 0%,rgba(33,26,18,.2) 35%,rgba(33,26,18,.86) 100%);}
  .ac-hero .inner{position:relative;padding-bottom:74px;width:100%;}
  .crumb{font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.7);margin-bottom:26px;}
  .crumb a{color:rgba(255,255,255,.7);text-decoration:none;}
  .crumb a:hover{color:#e8c79a;}
  .ac-hero h1{color:#fff;font-size:clamp(2.6rem,6vw,5rem);max-width:15ch;margin-bottom:22px;}
  .ac-hero h1 em{font-family:'Fraunces';font-style:italic;color:#e8c79a;font-size:1.04em;}
  .ac-hero .sub{color:rgba(255,255,255,.9);font-size:1.2rem;max-width:46ch;margin-bottom:18px;}
  .ac-hero .servesline{color:rgba(255,255,255,.62);font-size:.92rem;letter-spacing:.04em;}
  .ac-hero .cta-row{margin-top:34px;display:flex;gap:18px;flex-wrap:wrap;}
  .btn-primary{display:inline-block;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;background:#c9a673;color:var(--night);padding:16px 32px;text-decoration:none;transition:all .4s;}
  .btn-primary:hover{background:#efe4d2;transform:translateY(-2px);}
  .btn-ghost{display:inline-block;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;border:1px solid rgba(255,255,255,.5);color:#fff;padding:16px 32px;text-decoration:none;transition:all .4s;}
  .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}

  /* stat strip */
  .stats{background:var(--night);color:var(--night-text);padding:40px 0;}
  .stats .row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:30px;}
  .stat{flex:1;min-width:160px;}
  .stat .n{font-family:'Archivo';font-weight:500;font-size:2.1rem;color:#efe4d2;letter-spacing:-.03em;line-height:1;}
  .stat .t{font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;margin-top:8px;}

  /* method */
  .sec{padding:120px 0;}
  .sec-head{max-width:42ch;margin-bottom:60px;}
  .sec-head h2{font-size:clamp(2rem,4.2vw,3.2rem);margin:18px 0;}
  .sec-head h2 em{font-family:'Fraunces';font-style:italic;color:var(--accent);}
  .sec-head p{color:var(--ink-soft);font-size:1.1rem;}
  .method-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
  .m-card{border-top:1px solid var(--line);padding-top:24px;}
  .m-card .idx{font-family:'Fraunces';font-style:italic;color:var(--accent);font-size:.9rem;}
  .m-card h3{font-size:1.35rem;margin:8px 0 12px;}
  .m-card p{color:var(--ink-soft);font-size:1rem;max-width:46ch;}
  @media(max-width:760px){.method-grid{grid-template-columns:1fr;}}

  /* the difference - light contrast block */
  .diff{background:var(--paper);}
  .diff .eyebrow{color:var(--accent);}
  .diff h2{color:var(--ink);font-size:clamp(1.9rem,3.8vw,3rem);margin:18px 0;max-width:20ch;}
  .diff h2 em{font-family:'Fraunces';font-style:italic;color:var(--accent);}
  .compare{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:50px;}
  .compare>div{background:var(--paper);padding:38px 36px;}
  .compare .them{background:var(--paper-deep);}
  .compare h4{font-family:'Archivo';font-weight:600;font-size:.84rem;letter-spacing:.18em;text-transform:uppercase;margin-bottom:22px;}
  .compare .them h4{color:var(--ink-soft);}
  .compare .us h4{color:var(--accent);}
  .compare .us h4::before{content:"";display:inline-block;width:22px;height:2px;background:var(--accent);vertical-align:middle;margin-right:10px;}
  .compare ul{list-style:none;}
  .compare li{padding:11px 0;border-top:1px solid var(--line);font-size:.98rem;color:var(--ink-soft);}
  .compare .us li{color:var(--ink);}
  @media(max-width:680px){.compare{grid-template-columns:1fr;}}

  /* process steps */
  .steps{counter-reset:step;}
  .step-row{display:grid;grid-template-columns:80px 1fr;gap:30px;padding:30px 0;border-top:1px solid var(--line);}
  .step-row .num{font-family:'Fraunces';font-style:italic;font-size:2.2rem;color:var(--accent);line-height:1;}
  .step-row h3{font-size:1.4rem;margin-bottom:8px;}
  .step-row p{color:var(--ink-soft);max-width:54ch;}

  /* IAQ upsell + membership soft */
  .nextstep{background:var(--paper-deep);}
  .next-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
  .next-card{background:var(--paper);border:1px solid var(--line);padding:40px 38px;display:flex;flex-direction:column;}
  .next-card .eyebrow{color:var(--accent);}
  .next-card h3{font-size:1.6rem;margin:14px 0;}
  .next-card h3 em{font-family:'Fraunces';font-style:italic;color:var(--accent);}
  .next-card p{color:var(--ink-soft);flex-grow:1;}
  .next-card a{margin-top:20px;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);text-decoration:none;}
  @media(max-width:760px){.next-grid{grid-template-columns:1fr;}}

  /* CTA */
  .final{background:var(--night);color:var(--night-text);text-align:center;padding:120px 0;}
  .final .eyebrow{color:#c79a5e;}
  .final h2{color:#efe4d2;font-size:clamp(2rem,4.4vw,3.4rem);margin:22px auto;max-width:20ch;}
  .final h2 em{font-family:'Fraunces';font-style:italic;color:#d9b783;}
  .final p{color:#a89c84;max-width:46ch;margin:0 auto 36px;}

  footer{padding:70px 0 50px;}
  .foot-top{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:30px;padding-bottom:40px;border-bottom:1px solid var(--line);}
  .foot-top .logo{font-size:1.8rem;}
  .foot-line{font-family:'Fraunces';font-style:italic;font-size:1.2rem;color:var(--ink-soft);max-width:24ch;}
  .foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;padding-top:26px;font-size:.8rem;color:var(--ink-soft);}
  .foot-bottom a{color:var(--ink-soft);text-decoration:none;}

  .reveal{opacity:0;transform:translateY(28px);transition:opacity 1s cubic-bezier(.2,.7,.3,1),transform 1s cubic-bezier(.2,.7,.3,1);}
  .reveal.in{opacity:1;transform:none;}