@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --ink:#111719;
  --muted:#626a6c;
  --green:#acd51f;
  --orange:#f47b20;
  --dark:#101719;
  --soft:#f4f5f2;
  --line:rgba(17,23,25,.14);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:#fff;
  font-family:Inter,Arial,sans-serif;
  font-size:18px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased
}
img{max-width:100%}
a{color:inherit}
.shell{width:min(1180px,calc(100% - 48px));margin:auto}
.narrow{width:min(800px,calc(100% - 48px))}
.site-header{border-bottom:1px solid var(--line);background:#fff}
.header-inner{min-height:94px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.brand-logo{display:block;width:235px;height:auto}
.header-nav{display:flex;align-items:center;gap:28px}
.header-link{font-size:.84rem;font-weight:700;text-decoration:none;color:var(--muted)}
.header-link:hover{color:var(--ink)}
.hero{min-height:790px;padding:90px 0 110px;display:grid;grid-template-columns:1.05fr .95fr;gap:90px;align-items:center}
.eyebrow{margin:0 0 22px;color:var(--green);font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
h1,h2{margin:0;font-weight:800;letter-spacing:-.05em}
h1{font-size:clamp(3.6rem,7vw,7rem);line-height:.97}
h2{font-size:clamp(2.6rem,5vw,4.9rem);line-height:1.02}
.hero-answer{margin:34px 0 12px;color:var(--green);font-size:clamp(1.4rem,2.2vw,2.1rem);font-weight:800}
.hero-intro{max-width:680px;margin:0 0 32px;color:var(--muted)}
.button{display:inline-block;padding:14px 21px;background:var(--ink);color:#fff;text-decoration:none;font-size:.9rem;font-weight:800;border:1px solid var(--ink)}
.button-outline{display:inline-block;padding:13px 20px;background:transparent;color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:800;border:1px solid var(--ink)}
.button-outline:hover{background:var(--ink);color:#fff}
.cover-area{display:flex;justify-content:center}
.book-cover{display:block;width:min(480px,90vw);height:auto;box-shadow:0 28px 70px rgba(10,16,18,.25)}
.release-section{padding:105px 0;background:var(--dark);color:#fff}
.release-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:86px;align-items:start}
.release-copy h2{margin-bottom:26px}
.release-copy>p:last-child{color:#cbd1d2}
.zoho-form-wrap{background:#fff;color:var(--ink);padding:36px}
.zoho-form-wrap meta,.zoho-form-wrap #imgBlock,.zoho-form-wrap br:first-of-type{display:none}
.zoho-form-wrap #SIGNUP_PAGE,.zoho-form-wrap #signupMainDiv,.zoho-form-wrap #SIGNUP_BODY_ALL,.zoho-form-wrap #SIGNUP_BODY,.zoho-form-wrap .zcsffieldsdiv{width:100%!important;max-width:none!important;margin:0!important;padding:0!important;background:transparent!important;border:0!important;box-shadow:none!important}
.zoho-form-wrap #SIGNUP_HEADING{margin:0 0 8px!important;color:var(--ink)!important;font:800 1.9rem/1.15 Inter,Arial,sans-serif!important;letter-spacing:-.03em!important}
.zoho-form-wrap #SIGNUP_DESCRIPTION{margin-bottom:22px!important;color:var(--muted)!important;font:400 .94rem/1.5 Inter,Arial,sans-serif!important}
.zoho-form-wrap .zcsffield{margin-bottom:12px!important}
.zoho-form-wrap .zcsffield>div:first-child{display:flex;align-items:center}
.zoho-form-wrap input[type=text],.zoho-form-wrap input[type=email]{width:100%!important;min-height:49px;padding:12px 14px!important;border:1px solid rgba(17,23,25,.22)!important;border-radius:0!important;background:#fff!important;color:var(--ink)!important;font:400 .94rem Inter,Arial,sans-serif!important}
.zoho-form-wrap input[type=text]:focus,.zoho-form-wrap input[type=email]:focus{outline:3px solid rgba(172,213,31,.22);border-color:var(--green)!important}
.zoho-form-wrap span[name=SIGNUP_REQUIRED]{margin-left:6px;color:var(--orange)}
.zoho-form-wrap #REQUIRED_FIELD_TEXT{margin:6px 0 16px!important;color:var(--muted)!important;font-size:.74rem!important}
.zoho-form-wrap div[name=privacyPolicy]{display:flex;align-items:flex-start;gap:8px;margin:0 0 18px!important;color:var(--muted)!important;font-size:.77rem!important;line-height:1.45!important}
.zoho-form-wrap div[name=privacyPolicy] input{margin-top:4px}
.zoho-form-wrap div[name=privacyPolicy] span{margin-left:0!important}
.zoho-form-wrap #zcWebOptin{width:100%!important;min-height:51px;padding:13px 20px!important;border:1px solid var(--green)!important;border-radius:0!important;background:var(--green)!important;color:var(--ink)!important;font:800 .92rem Inter,Arial,sans-serif!important;cursor:pointer}
.zoho-form-wrap #errorMsgDiv{display:none;margin:0 0 14px!important;color:#a42323!important;font-size:.84rem!important}
.zoho-form-wrap #privacyNotes{margin-top:18px!important;color:var(--muted)!important;font-size:.71rem!important;line-height:1.45!important}
.zoho-form-wrap #Zc_SignupSuccess{position:static!important;width:100%!important;margin:0 0 18px!important}
.article-hero{padding:88px 0 56px}
.article-hero h1{font-size:clamp(2.6rem,6vw,4.6rem);line-height:1}
.article-hero .hero-answer{font-size:clamp(1.2rem,2vw,1.6rem)}
.article-lead{margin:28px 0 0;color:var(--muted);font-size:1.15rem}
.article-meta{margin:22px 0 0;color:var(--muted);font-size:.86rem}
.article-meta a{color:var(--ink);font-weight:700;text-decoration:underline}
.article-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.toc{padding:34px 0;background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.toc h2{margin:0 0 18px;font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.toc-list{columns:2;column-gap:40px;margin:0;padding:0;list-style:none}
.toc-list li{break-inside:avoid;margin-bottom:9px}
.toc-list a{font-size:.94rem;font-weight:600;text-decoration:none;color:var(--ink);border-bottom:1px solid transparent}
.toc-list a:hover{border-color:var(--green)}
.article-body{padding:96px 0}
.article-body section{margin-bottom:80px}
.article-body section:last-child{margin-bottom:0}
.article-body h2{font-size:clamp(1.6rem,3vw,2.4rem);line-height:1.12;letter-spacing:-.03em;margin:0 0 24px}
.article-body p{margin:0 0 22px}
.article-body p:last-child{margin-bottom:0}
.article-body ul{margin:0 0 24px;padding-left:22px}
.article-body li{margin-bottom:10px}
.article-body blockquote{font-size:clamp(1.4rem,2.4vw,2rem);margin:0 0 24px}
.section{padding:112px 0}
.section h2,.dark-section h2,.applications h2{margin-bottom:38px}
.section p,.dark-section p{margin:0 0 25px}
.section p:last-child,.dark-section p:last-child{margin-bottom:0}
blockquote{margin:0 0 32px;padding-left:28px;border-left:5px solid var(--green);font-size:clamp(1.8rem,3.4vw,3.1rem);line-height:1.23;font-weight:700;letter-spacing:-.04em}
.dark-section{padding:112px 0;background:var(--dark);color:#fff}
.dark-section p{color:#d0d5d6}
.applications{padding:112px 0;background:var(--soft)}
.applications h2{max-width:900px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.grid span{min-height:112px;display:flex;align-items:flex-end;padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-weight:800}
.about{display:grid;grid-template-columns:.78fr 1.22fr;gap:88px}
.about h2{margin-bottom:0}
.closing{padding:105px 0;background:var(--green)}
.closing-inner{display:flex;justify-content:space-between;align-items:flex-end;gap:60px}
.closing h2{max-width:900px}
footer{padding:30px 0 48px;border-top:1px solid var(--line);color:var(--muted);font-size:.8rem}
.footer-inner{display:flex;justify-content:space-between;gap:22px}
.footer-inner p{margin:0}
@media(max-width:920px){
  .hero,.release-layout,.about{grid-template-columns:1fr}
  .hero{min-height:auto;gap:68px}
  .cover-area{justify-content:flex-start}
  .release-layout{gap:44px}
  .about{gap:38px}
  .grid{grid-template-columns:repeat(2,1fr)}
  .closing-inner{align-items:flex-start;flex-direction:column}
}
@media(max-width:580px){
  body{font-size:17px}
  .shell,.narrow{width:min(100% - 30px,1180px)}
  .header-inner{min-height:78px}
  .brand-logo{width:185px}
  .header-nav{display:none}
  .hero{padding:62px 0 78px}
  h1{font-size:3.3rem}
  .release-section,.section,.dark-section,.applications,.closing{padding:78px 0}
  .zoho-form-wrap{padding:24px 18px}
  .grid{grid-template-columns:1fr}
  .grid span{min-height:86px}
  .footer-inner{flex-direction:column;gap:6px}
  .article-hero{padding:56px 0 40px}
  .article-body{padding:64px 0}
  .article-body section{margin-bottom:56px}
  .toc-list{columns:1}
}

.hero-tagline{font-size:1.5rem;font-weight:600;color:#4b5563;margin:0.5rem 0 1.5rem;text-align:center;}