:root{
  --ink:#12211c;
  --muted:#5b6f68;
  --bg:#ffffff;
  --soft:#f2f7f4;
  --brand:#1fa97a;
  --brand-dark:#16805c;
  --line:#dfe8e4;
  --radius:14px;
  --wrap:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(2rem,5vw,3.25rem);letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3.5vw,2.25rem);letter-spacing:-.01em}
p{margin:0 0 1rem}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.narrow{max-width:620px}

/* nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:1.25rem;text-decoration:none;color:var(--ink)}
.logo span{color:var(--brand)}

/* buttons */
.btn{
  display:inline-block;background:var(--brand);color:#fff;text-decoration:none;
  font-weight:700;border:0;border-radius:999px;padding:14px 28px;cursor:pointer;
  font-size:1rem;transition:background .15s ease,transform .15s ease;
}
.btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:.9rem}
.btn-lg{padding:16px 34px;font-size:1.05rem}

/* hero */
.hero{background:linear-gradient(180deg,var(--soft),#fff);padding:72px 0 64px}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:700;color:var(--brand);margin-bottom:.75rem}
.sub{color:var(--muted);font-size:1.1rem;max-width:52ch}
.ticks{list-style:none;display:flex;flex-wrap:wrap;gap:18px;padding:0;margin:22px 0 0;color:var(--muted);font-size:.92rem}
.ticks li::before{content:"✓";color:var(--brand);font-weight:800;margin-right:7px}
.hero-art{display:grid;gap:14px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:0 6px 24px rgba(18,33,28,.05)}
.stat strong{display:block;font-size:2.4rem;line-height:1;color:var(--brand)}
.stat span{color:var(--muted);font-size:.9rem}

/* sections */
section{padding:64px 0}
.benefits h2,.proof h2,.signup h2,.faq h2{text-align:center;margin-bottom:36px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin:0}
.card h3{font-size:1.15rem}
.card p{color:var(--muted);margin-bottom:0}
.icon{font-size:1.9rem;margin-bottom:10px}
.proof{background:var(--soft)}
.proof cite{display:block;margin-top:12px;color:var(--ink);font-style:normal;font-weight:600;font-size:.92rem}

/* form */
.signup{background:var(--ink);color:#fff;text-align:center}
.signup .sub{color:#b9cbc4;margin:0 auto 26px}
#lead-form{display:grid;gap:12px}
#lead-form input{
  width:100%;padding:15px 18px;border-radius:999px;border:1px solid transparent;
  font-size:1rem;font-family:inherit;
}
#lead-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,169,122,.35)}
#lead-form input.invalid{border-color:#ff8f8f;box-shadow:0 0 0 3px rgba(255,143,143,.3)}
.error{color:#ffb3b3;min-height:1.25rem;font-size:.9rem;margin:0}
.success{color:#7ef0c2;font-weight:600;margin:0}
.fineprint{color:#8fa8a0;font-size:.82rem;margin-top:10px}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin:10px 0 0}

/* footer */
.foot{background:var(--soft);padding:34px 0;font-size:.85rem;color:var(--muted);text-align:center}
.foot a{color:var(--muted)}

@media (max-width:820px){
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-art{grid-template-columns:repeat(3,1fr)}
  .grid{grid-template-columns:1fr}
  section{padding:48px 0}
}