:root{--ink:#102b23;--green:#083829;--muted:#68746d;--paper:#fffefa;--pale:#f4f3ed;--line:#dcded6;--leaf:#80ac58}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Avenir Next',Avenir,'Trebuchet MS',sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}img,svg{max-width:100%;display:block}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #70a748;outline-offset:5px}.skip{position:fixed;top:-100px;left:20px;background:white;padding:15px;z-index:100}.skip:focus{top:10px}header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 5%;position:sticky;top:0;z-index:30;border-bottom:1px solid #153e2612;background:#fffefae8;backdrop-filter:blur(20px)}.brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:800;letter-spacing:-.7px}.brand img{width:28px;height:28px;object-fit:contain}nav{display:flex;gap:34px;align-items:center;font-size:13px;font-weight:500}.nav-contact{border:1px solid #203e3030;padding:10px 17px;border-radius:30px}.nav-contact span{margin-left:18px}a:hover{color:#55803b}.wrap{max-width:1180px;margin:auto;padding-left:36px;padding-right:36px}.narrow{max-width:860px}.hero{text-align:center;padding-top:72px;overflow:hidden}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2.1px;text-transform:uppercase;margin:0 0 24px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(45px,5.5vw,80px);letter-spacing:-4.3px;line-height:1.07;font-weight:600;margin-bottom:25px}h1 span,h2 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p:last-child{max-width:490px;margin-left:auto;margin-top:45px}.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:70px}.pale{background:var(--pale)}.center{text-align:center}.center>p:not(.eyebrow){max-width:600px;margin-left:auto;margin-right:auto}.small{font-size:12px;line-height:1.6;color:#69756e}.pills{display:inline-flex;flex-wrap:wrap;gap:3px;padding:5px;border:1px solid #203e3020;border-radius:28px;margin:15px 0 8px;max-width:100%}.pills button{border:0;background:transparent;padding:11px 17px;color:var(--ink);border-radius:22px;font-size:12px}.pills button[aria-pressed=true]{background:var(--green);color:white;box-shadow:0 3px 9px #0001}.tab-copy{min-height:82px;font-size:14px;margin-top:12px}.carton-stage{height:550px;background:#eeede6;position:relative;display:grid;place-items:center;border-radius:3px;overflow:hidden}.carton{height:330px;width:150px;position:relative;transform:rotate(-8deg);filter:drop-shadow(30px 40px 16px #18342322)}.carton-face{height:100%;background:linear-gradient(115deg,#20543e,#0c3225);position:relative;color:#e3e5cf;padding:27px 22px;z-index:2;border:1px solid #ffffff20}.carton-face>span{font-size:13px;letter-spacing:3px}.carton-face i{display:block;width:60px;height:100px;border-radius:60px 0 60px 0;border:1px solid #b1bd9380;position:absolute;left:40px;top:115px;transform:rotate(25deg)}.carton-face small{position:absolute;bottom:25px;font-size:10px;line-height:1.6}.carton-side{position:absolute;width:65px;left:150px;height:330px;top:-23px;background:linear-gradient(90deg,#082e21,#174631);transform:skewY(-35deg);border:1px solid #ffffff12}.carton-top{position:absolute;top:-46px;left:32px;width:150px;height:46px;background:#38634c;transform:skewX(-55deg)}.stage-caption{position:absolute;bottom:24px;left:0;width:100%;text-align:center;font-size:9px;letter-spacing:2px;color:#6c756a}.board-layout{grid-template-columns:1.35fr 1fr;gap:40px;margin-top:40px}#board{width:100%;overflow:visible}#upper,#lower{transition:opacity .2s}#flute{transition:opacity .2s}.layer-buttons button{display:flex;width:100%;align-items:center;text-align:left;border:0;border-top:1px solid #cbd0c6;background:transparent;font-size:19px;padding:20px 0;color:var(--muted)}.layer-buttons button[aria-pressed=true]{color:var(--green);font-weight:700}.layer-buttons span{font-size:10px;margin-right:20px}.layer-buttons b{margin-left:auto;font-weight:400}.layer-info>p{font-size:14px}.layer-info .small{font-size:11px}.range-label{display:flex;justify-content:space-between;font-size:12px;color:#66736a;padding:0 5%}.range-label output{font-variant-numeric:tabular-nums}input[type=range]{width:90%;display:block;margin:17px auto;accent-color:var(--green);cursor:ew-resize}.range-ends{display:flex;justify-content:space-between;font-size:10px;padding:0 5%;color:var(--muted)}#sleeve{transition:transform .9s cubic-bezier(.22,.61,.36,1),opacity 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#819b71;padding-left:20px;margin-top:45px;max-width:850px}details{border-bottom:1px solid var(--line);padding:22px 0}summary{font-size:17px;cursor:pointer;font-weight:600}details p{font-size:14px;padding-top:15px;margin-bottom:0}details a{text-decoration:underline}.narrow>.button{margin-top:35px}.page-hero{padding-top:95px;padding-bottom:80px}.page-hero h1{max-width:1050px;font-size:68px}.prose{padding-bottom:100px}.prose h2{font-size:29px;letter-spacing:-1px;margin-top:50px;margin-bottom:20px}.prose p{font-size:16px}.prose a{text-decoration:underline}.contact-layout{align-items:start;padding-bottom:120px}form{background:var(--pale);padding:35px}form label{display:block;font-size:13px;font-weight:600;margin:0 0 8px}form label span{font-weight:400;color:var(--muted)}form input,form select,form textarea{width:100%;border:1px solid #cbd1c6;border-radius:6px;background:#fffefa;padding:13px;margin-bottom:23px;color:var(--ink);font-size:15px}form textarea{resize:vertical}#brief-result{border-top:1px solid var(--line);margin-top:30px;padding-top:25px}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.6 'Avenir Next',sans-serif}.copy-button{border:0;background:transparent;text-decoration:underline;padding:15px;font-size:12px}#copy-status{font-size:12px}section{scroll-margin-top:30px}
@media(min-width:1600px){.hero-image{max-width:1200px}}@media(max-width:850px){nav{gap:17px}header{padding:0 25px}.split{gap:35px}h1{letter-spacing:-2.7px}.statement h2{font-size:60px}.book{padding:20px}.cover-link{height:310px}.cover-link img{height:260px;margin-top:25px}.product-hero h1,.page-hero h1{font-size:48px;letter-spacing:-2px}.product-cover{padding:30px}.carton-stage{height:460px}.chapter{padding-top:85px;padding-bottom:85px}.board-layout{grid-template-columns:1fr 1fr;gap:22px}.three-lines{gap:25px}.book h3{font-size:25px}}
@media(max-width:620px){header{height:68px;padding:0 18px}.brand{font-size:13px;letter-spacing:-.5px}.brand img{width:23px;height:23px}nav{gap:0}nav>a:not(.nav-contact){display:none}.nav-contact{font-size:11px;padding:9px 12px}.nav-contact span{margin-left:5px}.wrap{padding-left:24px;padding-right:24px}.hero{padding-top:55px}.hero h1{font-size:43px;letter-spacing:-2.5px;padding:0 15px}.eyebrow{font-size:9px;letter-spacing:1.8px;margin-bottom:22px}.lead{font-size:17px}.hero .lead{padding:0 25px}.hero-image{width:120%;max-width:none;margin-left:-10%;margin-top:15px}.hero-image figcaption{right:14%;font-size:7px;bottom:12px}.chapter-nav{gap:0;justify-content:space-around;padding:19px 6px;font-size:8px;letter-spacing:0}.statement{padding-top:80px;padding-bottom:60px}.statement h2{font-size:43px;letter-spacing:-2px}.statement p:last-child{margin-top:25px}.split,.board-layout{grid-template-columns:1fr;gap:36px}.chapter{padding-top:75px;padding-bottom:75px}h2{font-size:42px;letter-spacing:-2px}p{font-size:16px}.carton-stage{height:450px}.carton{transform:scale(.88) rotate(-8deg)}.board-layout{margin-top:0}#board{margin:0 -8%;max-width:116%;width:116%}.layer-info{margin-top:15px}#shelf{margin-top:-30px}.metrics strong{font-size:49px}.metrics{gap:40px}.caveat{grid-template-columns:1fr;gap:16px;margin-top:20px}.three-lines{grid-template-columns:1fr;gap:20px;margin-top:38px}.three-lines h3{margin-top:17px;margin-bottom:10px}.three-lines p{margin-bottom:8px}.books{grid-template-columns:1fr;margin-top:40px}.book{padding:24px}.cover-link{height:340px}.cover-link img{height:290px}.book h3{font-size:29px}.large-copy{font-size:23px}.footer-top,.footer-bottom{flex-direction:column;align-items:flex-start;gap:15px}.footer-top>a{font-size:17px}.footer-bottom{gap:14px}footer{padding:40px 24px 25px}.product-hero{padding-top:60px;padding-bottom:70px}.product-hero h1,.page-hero h1{font-size:44px;letter-spacing:-2px}.product-cover{padding:35px}.product-cover img{max-height:440px}.page-hero{padding-top:60px;padding-bottom:50px}.contact-layout{padding-bottom:70px}form{padding:24px 20px}.future-row{gap:8px}.future-row span{font-size:11px}.narrow{max-width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
main{overflow:clip}
/* Scroll narrative: deliberate pinned scenes, never scroll locking. */
.motion-hint{display:none;font-size:9px!important;letter-spacing:1.8px;color:#6a796b!important;margin-top:15px!important}
.scroll-enabled .motion-hint{display:block}
.motion-switch{position:fixed;bottom:18px;right:20px;z-index:35;padding:10px 16px;border:1px solid #90a18b55;border-radius:25px;background:#fffefaed;backdrop-filter:blur(16px);font-size:10px;color:#214032;box-shadow:0 3px 15px #102b2312}
.scroll-enabled #sleeve{transition:none}
.shelf-pin{width:100%}
@media(min-width:851px) and (min-height:751px){
.scroll-enabled #estrutura{height:175svh;padding-top:0;padding-bottom:0}
.scroll-enabled .structure-pin{position:sticky;top:78px;height:calc(100svh - 78px);display:flex;flex-direction:column;justify-content:center;padding-top:20px;padding-bottom:20px}
.scroll-enabled #estrutura h2{font-size:clamp(38px,4.1vw,58px);margin-bottom:14px}
.scroll-enabled #estrutura .center .eyebrow{margin-bottom:15px}
.scroll-enabled #estrutura .center>p:not(.eyebrow):not(.motion-hint){font-size:15px;margin-bottom:0}
.scroll-enabled #estrutura .board-layout{margin-top:0}
.scroll-enabled #board{max-height:310px}
.scroll-enabled #shelf-ready{height:165svh;padding-top:0;padding-bottom:0}
.scroll-enabled .shelf-pin{position:sticky;top:78px;height:calc(100svh - 78px)}
}
@media(max-width:620px){.motion-switch{right:12px;bottom:12px;font-size:9px;padding:9px 12px}}
@media(prefers-reduced-motion:reduce){.motion-hint{display:none!important}}