:root{--ink:#11273c;--deep:#0c1d30;--paper:#fcf7eb;--light:#fffdf7;--mint:#51d9c3;--teal:#007f80;--coral:#ffad9d;--muted:#536471;--line:#d6ddd7;--sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--display:Georgia,"Times New Roman",serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:1rem/1.55 var(--sans)}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
a:focus-visible{outline:3px solid #c04e3f;outline-offset:4px}
.hero a:focus-visible,.header a:focus-visible,.footer a:focus-visible{outline-color:var(--mint)}
a[hidden]{display:none}
.wrap{width:min(100% - 96px,1184px);margin-inline:auto}
.skip{position:fixed;left:1rem;top:1rem;transform:translateY(-150%);padding:.7rem 1rem;background:var(--mint);z-index:10}
.skip:focus{transform:none}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.header,.hero,.footer{background:var(--ink);color:var(--paper)}
.header{border-bottom:1px solid #3b5062}
.header-inner,.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:1.5rem}
.header-inner{min-height:79px}
.brand{display:inline-flex;align-items:center;gap:.7rem;text-decoration:none;font-weight:850;line-height:1.02;letter-spacing:.11em;font-size:1.05rem;flex-shrink:0}
.brand small{display:block;margin-top:.25rem;font-size:.55rem;letter-spacing:.29em;color:var(--mint)}
nav{display:flex;align-items:center;gap:clamp(.8rem,3vw,2.2rem)}
nav a{font-weight:680;font-size:.88rem;text-decoration:none;white-space:nowrap}
nav a:hover,.footer a:hover{text-decoration:underline;text-underline-offset:.25em}
.nav-cta{padding:.6rem .85rem;border:1px solid #6c8d98;border-radius:.5rem}
.hero{overflow:hidden;background:radial-gradient(ellipse at 80% 41%,#1d4a55 0%,var(--ink) 52%,var(--deep) 100%)}
.hero-grid{display:grid;grid-template-columns:1fr .93fr;align-items:center;min-height:550px;gap:2rem;padding-block:4rem}
.eyebrow{font-weight:800;font-size:.73rem;letter-spacing:.15em;line-height:1.5;color:#076b68;margin:0 0 1.05rem}
.hero .eyebrow,.footer .eyebrow{color:var(--mint)}
.dot{display:inline-block;width:.5rem;height:.5rem;margin-right:.45rem;border-radius:50%;background:var(--mint);box-shadow:0 0 16px #51d9c37a}
h1,h2,h3,p,figure{margin:0}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.02;letter-spacing:-.055em}
h1{font-size:clamp(3.5rem,7.3vw,7.2rem)}
h1 em{font-weight:400;color:var(--mint)}
.hero-intro{max-width:31rem;color:#dce7e5;font-size:clamp(1rem,1.4vw,1.2rem);margin:1.55rem 0 1.85rem}
.actions,.product-actions{display:flex;align-items:center;flex-wrap:wrap;gap:.65rem}
.button{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;min-height:47px;padding:.66rem 1rem;border:1px solid transparent;border-radius:.5rem;font-weight:790;font-size:.88rem;line-height:1.3;text-decoration:none;transition:background .15s,border .15s}
.primary{background:var(--coral);color:var(--deep)}
.primary:hover{background:#ffc4b9}
.ghost{color:var(--paper);border-color:#79949c}
.ghost:hover{background:#ffffff18}
.ink{background:var(--ink);color:var(--paper)}
.ink:hover{background:#254a60}
.book-stage{position:relative;isolation:isolate;display:grid;place-items:center;min-height:440px}
.orbit{position:absolute;inset:-5% 0 0;width:100%;height:110%;stroke:#72bbb958;stroke-width:1;z-index:-2}
.orbit-dot{fill:var(--mint);stroke:none}
.book-cover,.book-back{width:clamp(175px,22vw,285px);aspect-ratio:600/780;border-radius:5px 9px 9px 5px;transform:rotate(-8deg)}
.book-cover{box-shadow:17px 18px 35px #020c18a6,4px 0 0 #eae5d7,8px 2px 0 #b7c4bb;position:relative}
.book-back{position:absolute;background:#61d5bb;transform:translate(23px,8px) rotate(7deg);opacity:.86;z-index:-1}
.book-stage figcaption{position:absolute;right:-.15rem;bottom:.5rem;border:1px solid #61818b;border-radius:.65rem;background:#11273cf5;padding:.9rem 1rem;box-shadow:0 8px 24px #06142477}
.book-stage figcaption span{display:block;font-size:.57rem;letter-spacing:.1em;color:#a6dbd0;font-weight:770}
.book-stage figcaption strong{display:block;font-size:.95rem;margin:.15rem 0 .2rem}
.library,.series,.inside{padding-block:clamp(3.5rem,7vw,6rem)}
.section-head{margin-bottom:1.8rem}
h2{font-size:clamp(2.4rem,5vw,4.65rem)}
.section-head>p:last-child{margin-top:.8rem;max-width:38rem;color:var(--muted)}
.product{display:grid;grid-template-columns:.8fr 1.2fr;border:1px solid var(--line);border-radius:1.1rem;overflow:hidden;background:var(--light);box-shadow:0 16px 36px #162e4010}
.product-art{display:grid;place-items:center;background:repeating-linear-gradient(135deg,#d5ede3,#d5ede3 11px,#def2e9 11px,#def2e9 13px);position:relative;min-height:350px;padding:3.9rem 2rem 2.3rem}
.product-art img{width:min(100%,180px);border-radius:3px 6px 6px 3px;box-shadow:9px 11px 0 #0d655a31,0 11px 25px #0c38372f}
.product-label{position:absolute;inset:1.1rem 1.2rem auto;display:flex;justify-content:space-between;font-size:.65rem;letter-spacing:.15em;font-weight:850;color:#1a625d}
.product-info{align-self:center;padding:clamp(1.5rem,4vw,3.35rem)}
.product h3{font-size:clamp(2.15rem,4.5vw,4rem);margin-bottom:1rem}
.product-info>p:not(.eyebrow,.shop-note),.inside p:not(.eyebrow){max-width:36rem;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:.4rem;list-style:none;padding:0;margin:1.2rem 0 1.5rem}
.tags li,.planned{border:1px solid #b3cdc2;background:#e9f5ed;border-radius:100vw;padding:.24rem .68rem;font-weight:770;font-size:.73rem;color:#255b55;white-space:nowrap}
.shop-note{margin-top:.8rem;color:#51616b;font-size:.84rem}
.inside{background:#e6f2ea}
.inside-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:3.25rem;align-items:center}
.inside h2{margin-bottom:.9rem}
.chapter-list{padding:0;list-style:none;margin:1.35rem 0}
.chapter-list li{padding:.6rem 0;border-bottom:1px solid #b8d1c6}
.chapter-list span{color:#086b65;font-size:.72rem;font-weight:850;margin-right:.5rem}
.text-link,.track-link{font-weight:820;text-decoration-thickness:1px;text-underline-offset:.22em}
.spread{display:grid;grid-template-columns:1fr 1fr;gap:.7rem;align-items:center;text-decoration:none}
.spread img{width:100%;border:1px solid #ccd9cd;border-radius:6px;box-shadow:0 9px 22px #153e4024}
.spread img:last-child{margin-top:1.6rem}
.tracks{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.tracks li{display:grid;grid-template-columns:2.6rem 1fr auto;gap:.9rem;align-items:center;padding:1.15rem 0;border-bottom:1px solid var(--line)}
.track-index{color:#0a6760;font-weight:850;font-size:.78rem}
.tracks h3{font-size:1.9rem;margin-bottom:.2rem}
.tracks p{font-size:.93rem;color:var(--muted)}
.track-link{font-size:.87rem}
.planned{background:transparent}
.footer-inner{padding-block:1.6rem}
.footer p,.footer-inner>a:last-child{font-size:.84rem;color:#dce7e5}
.footer-inner>a:last-child{font-weight:720}
@media(max-width:850px){
 .wrap{width:min(100% - 48px,1184px)}
 .hero-grid{min-height:470px;gap:.7rem;padding-block:2.8rem}
 .book-stage{min-height:360px}
 .book-stage figcaption{right:0;bottom:-.15rem}
 .inside-grid{gap:1.6rem}
}
@media(max-width:640px){
 .wrap{width:calc(100% - 36px)}
 .header-inner{min-height:66px;gap:.45rem}
 .brand img{width:31px;height:31px}
 .brand{font-size:.87rem;gap:.45rem}
 nav{gap:.65rem}
 nav a{font-size:.76rem}
 nav a:nth-child(2){display:none}
 .nav-cta{padding:.44rem .55rem}
 .hero-grid,.product,.inside-grid{grid-template-columns:1fr}
 .hero-grid{padding-block:2.5rem 1.65rem;gap:.55rem}
 h1{font-size:clamp(3.35rem,13vw,5.55rem)}
 .hero-intro{margin:1.25rem 0 1.4rem}
 .book-stage{min-height:348px;margin-top:.6rem}
 .book-cover,.book-back{width:clamp(176px,44vw,234px)}
 .book-stage figcaption{right:.2rem;bottom:.25rem}
 .product-art{min-height:265px;padding:2.8rem 1rem 1.4rem}
 .product-art img{width:134px}
 .tracks li{grid-template-columns:1.45rem 1fr auto;gap:.55rem}
 .tracks p{font-size:.84rem}
 .track-link{font-size:.79rem}
 .footer-inner{align-items:flex-start;flex-direction:column;gap:.8rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

.product-info .product-subtitle{margin-bottom:.65rem;color:var(--ink)}

/* Book landing page */
.landing-hero h1{font-size:clamp(3.25rem,6.6vw,6.6rem)}
.landing-subtitle{color:#f0eada;font-size:clamp(1rem,2vw,1.28rem);max-width:31rem;margin-top:.85rem;font-weight:720}
.landing-hero .hero-intro{margin:1rem 0 1.2rem}
.landing-tags{display:flex;flex-wrap:wrap;gap:.45rem;list-style:none;padding:0;margin:0 0 1.35rem}
.landing-tags li{border:1px solid #668592;border-radius:100vw;padding:.24rem .72rem;font-size:.77rem;font-weight:700;color:#e2ede9}
.landing-note{margin-top:.75rem;color:#c0d6d8;font-size:.83rem}
.landing-activities{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;list-style:none;padding:0;margin:0}
.landing-activities li{padding:1.4rem 1.25rem;border:1px solid var(--line);border-radius:.8rem;background:var(--light)}
.landing-activities li span{font-size:.7rem;letter-spacing:.1em;font-weight:850;color:#066e66}
.landing-activities h3{font-size:clamp(1.5rem,2.5vw,2.25rem);margin:.65rem 0 .55rem}
.landing-activities p,.landing-faq details p{color:var(--muted);font-size:.93rem}
.landing-sample{margin-top:1.15rem}
.landing-faq{display:grid;grid-template-columns:.65fr 1fr;gap:2rem}
.landing-faq details{border-bottom:1px solid var(--line);padding:.85rem 0}
.landing-faq details:first-child{border-top:1px solid var(--line)}
.landing-faq summary{font-weight:780;cursor:pointer;padding:.2rem 0}
.landing-faq details p{margin:.45rem 0 .2rem 1rem}
.landing-return{display:inline-block;margin-top:1.2rem}
.product-info .book-detail-link{display:inline-block;margin-top:.9rem;font-size:.87rem}
@media(max-width:640px){
 .landing-hero h1{font-size:clamp(3.05rem,12vw,5rem)}
 .landing-activities,.landing-faq{grid-template-columns:1fr}
}

@media(max-width:640px){.book-landing nav a:nth-child(2){display:inline-flex}}