:root{--ink:#102530;--muted:#53616c;--blue:#017efe;--purple:#8f52df;--line:#dce1e8;--paper:#f4f5f9;font-family:'Avenir Next',Avenir,'Century Gothic',Arial,sans-serif;color-scheme:light;color:var(--ink);background:white;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:6rem}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;border:0}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #017efe;outline-offset:5px}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin:0}p{font-size:1.0625rem;line-height:1.7;color:var(--muted)}h1,h2,h3{font-weight:500;letter-spacing:-.045em}h2{font-size:clamp(2.1rem,3.7vw,3.25rem);line-height:1.12}h3{font-size:1.4rem;letter-spacing:-.02em}.container{width:min(1200px,calc(100% - 112px));margin-inline:auto}.section{padding-block:100px}.eyebrow{font-size:.78rem;line-height:1.5;font-weight:600;letter-spacing:.15em;color:var(--ink)}.skip-link{position:fixed;top:-100px;left:20px;padding:14px;background:white;z-index:100}.skip-link:focus{top:15px}
.header{background:var(--paper);border-bottom:1px solid #e4e6ed}.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:100px;gap:28px}.brand{display:flex;align-items:center;gap:12px;font-size:.81rem;font-weight:600;line-height:1.3;letter-spacing:.12em}.brand-mark{width:42px;height:42px;flex-shrink:0}.nav{display:flex;gap:36px;font-size:.9rem}.nav a,.header-contact{transition:color .2s}.nav a:hover,.header-contact:hover{color:#0068d5}.header-contact{font-size:.9rem;border-bottom:1px solid #a1abb2;padding-block:7px}
.hero{background:var(--paper)}.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;padding-block:72px 66px;align-items:center}.hero-copy .eyebrow{display:flex;align-items:center;gap:12px}.small-line{width:25px;height:2px;background:var(--purple)}h1{font-size:clamp(3.5rem,6.8vw,6rem);line-height:1.02;margin-top:27px;letter-spacing:-.055em}h1 span{color:#7540bf}.hero-description{margin-top:28px;max-width:410px;font-size:1.15rem;line-height:1.65}.actions{display:flex;gap:25px;align-items:center;margin-top:32px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:15px 25px;font-size:.94rem;font-weight:600;border-radius:4px;transition:background .2s,transform .2s}.button:hover{transform:translateY(-2px)}.button-primary{background:var(--ink);color:white}.button-primary:hover{background:#254654}.text-link{font-size:.91rem;line-height:1.6;text-decoration:underline;text-decoration-color:#aeb5bb;text-underline-offset:5px;text-decoration-thickness:1px}.text-link:hover{text-decoration-color:var(--blue);color:#0068d5}.hero-meta{font-size:.81rem;margin-top:28px}.hero-book{position:relative;display:flex;flex-direction:column;align-items:center;padding-block:16px 0;isolation:isolate}.book-backdrop{position:absolute;width:85%;height:88%;top:5%;right:0;background:#e9e3f3;z-index:-1;border-radius:50% 50% 4px 4px}.cover{width:clamp(250px,27vw,360px);box-shadow:0 25px 35px -20px #25203866,6px 3px 0 #fff,7px 4px 0 #d0ccd5;transform:rotate(-5deg);border-radius:1px}.book-caption{margin-top:36px;display:flex;flex-direction:column;align-items:center;gap:7px;font-size:.76rem;line-height:1.4;letter-spacing:.08em}.book-caption span:last-child{letter-spacing:0;color:var(--muted);font-size:.85rem}.pillars-strip{border-top:1px solid #d9dce6;display:grid;grid-template-columns:repeat(4,1fr);padding-block:26px}.pillars-strip>span{display:flex;align-items:center;justify-content:center;gap:12px;font-size:.87rem;letter-spacing:.02em;border-right:1px solid #d9dce6}.pillars-strip>span:last-child{border:0}.pillars-strip i{width:7px;height:7px;border-radius:50%;display:block}.blue{background:#017efe}.teal{background:#40a4ae}.purple{background:#8f52df}.orange{background:#fd8a10}
.contents-section{display:grid;grid-template-columns:1fr 1.1fr;gap:110px}.section-intro h2{margin-top:20px}.section-intro>p:last-child{margin-top:25px;max-width:410px}.chapter-list{padding-top:35px}details{border-top:1px solid var(--line)}details:last-child{border-bottom:1px solid var(--line)}summary{list-style:none;display:flex;gap:23px;align-items:center;padding-block:23px;font-size:1.2rem;line-height:1.4;cursor:pointer}summary::-webkit-details-marker{display:none}.chapter-number{font-size:.8rem;letter-spacing:.05em;color:#7c8590;min-width:22px}.plus{width:16px;height:16px;position:relative;margin-left:auto;flex-shrink:0}.plus:before,.plus:after{content:'';position:absolute;background:var(--ink)}.plus:before{width:12px;height:1px;top:7px;left:2px}.plus:after{height:12px;width:1px;top:2px;left:7px}details[open] .plus:after{display:none}.chapter-body{padding:0 36px 25px 45px}.chapter-body p{font-size:1rem}
.preview-section{background:#f0f4f8;padding-block:92px}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:120px;align-items:center}.preview-copy h2{margin-top:20px}.preview-copy>p:not(.eyebrow){margin-top:25px;max-width:420px}.preview-tabs{margin-top:28px;display:flex;flex-direction:column;gap:3px}.preview-tab{background:transparent;display:flex;align-items:center;gap:20px;padding:18px 20px;text-align:left;border-radius:5px;transition:background .2s;position:relative;min-height:78px}.preview-tab:hover{background:#e8edf4}.preview-tab.active{background:white;box-shadow:0 4px 20px #153e5d05}.tab-number{font-size:.8rem;color:#7a8590;width:20px}.preview-tab strong{font-size:1.04rem;font-weight:500}.preview-tab small{display:block;font-size:.85rem;color:var(--muted);line-height:1.5;margin-top:3px}.tab-accent{margin-left:auto;width:5px;align-self:stretch;max-height:36px;opacity:0;border-radius:3px}.preview-tab.active .tab-accent{opacity:1}.preview-display{min-width:0}.page-open{display:block;position:relative;margin-inline:auto;max-width:376px;padding:0;background:white;box-shadow:0 16px 42px #203f5c1a}.page-open img{width:100%}.page-open:hover .zoom-label{background:var(--ink);color:white}.zoom-label{display:flex;gap:9px;align-items:center;justify-content:center;position:absolute;bottom:16px;right:16px;background:#ffffffec;border:1px solid var(--line);border-radius:3px;padding:9px 12px;font-size:.78rem;transition:background .2s,color .2s}.zoom-label svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.5}.page-caption{text-align:center;font-size:.8rem;margin-top:23px;line-height:1.5}
.method-heading{display:grid;grid-template-columns:1.3fr 1fr;gap:90px;align-items:end}.method-heading h2{margin-top:20px}.method-heading>p{max-width:420px}.method-grid{margin-top:54px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.method-card{padding:27px 23px 32px;background:var(--tint);border-top:2px solid var(--accent);border-radius:2px}.method-symbol{display:block;width:52px;height:52px;color:var(--accent);margin-bottom:28px}.method-symbol svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1}.method-card h3{margin-bottom:15px}.method-card p{font-size:.94rem;line-height:1.7}.audience-section,.author-section{display:grid;grid-template-columns:1fr 1fr;gap:110px;border-top:1px solid var(--line)}.audience-section h2,.author-section h2{margin-top:20px}.audience-copy p+p,.author-section p+p{margin-top:18px}.large-copy{font-size:1.45rem;color:var(--ink);line-height:1.4;letter-spacing:-.02em}.audience-copy .text-link,.author-section .text-link{display:inline-block;margin-top:24px}.series-section{padding:40px;background:#f5f2fa;border-radius:5px;margin-bottom:100px}.series-label{display:flex;gap:16px;align-items:center;margin-bottom:25px}.development-label{font-size:.75rem;border:1px solid #d3c8e3;color:#664d87;padding:5px 10px;border-radius:3px}.series-content{display:grid;grid-template-columns:1fr 1.2fr;gap:95px;align-items:center}.series-content h2{font-size:2.2rem}.series-content p{font-size:1rem}.author-section{padding-top:70px}.author-role{margin-top:20px;font-size:.87rem;max-width:300px}
.purchase-section{background:#142b38;color:white;padding-block:74px}.purchase-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:65px;align-items:center}.purchase-section .eyebrow{color:#bac9d8}.purchase-section h2{margin-top:20px;font-size:clamp(2rem,3.7vw,3.25rem)}.purchase-section p:not(.eyebrow){color:#bac9d8;margin-top:22px;font-size:1rem}.purchase-actions{display:flex;align-items:flex-start;flex-direction:column;gap:20px;margin-left:auto}.button-light{background:white;color:var(--ink);min-width:205px}.button-light:hover{background:#e3edfa}.purchase-contact{font-size:.86rem;line-height:1.5;text-decoration:underline;text-underline-offset:5px;text-decoration-color:#75848e}.shop-note{color:#a4b7c5;font-size:.78rem}.footer{padding-block:31px;display:flex;justify-content:space-between;gap:20px;font-size:.79rem;color:var(--muted)}.footer-brand{font-size:.75rem;letter-spacing:.12em;font-weight:600;color:var(--ink)}
dialog{width:min(900px,calc(100% - 32px));height:calc(100dvh - 32px);max-height:100dvh;border:0;border-radius:8px;padding:0;background:#edf0f5;color:var(--ink);box-shadow:0 20px 90px #10253066}dialog::backdrop{background:#102530a6;backdrop-filter:blur(4px)}.dialog-toolbar{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:white;border-bottom:1px solid var(--line);gap:20px}.dialog-toolbar h2{font-size:1.1rem;line-height:1.4;letter-spacing:-.02em}.dialog-close{background:transparent;font-size:.88rem;display:flex;gap:14px;align-items:center;padding:8px}.dialog-close span{font-size:1.6rem;line-height:1}.dialog-image-wrap{height:calc(100% - 144px);overflow:auto;padding:30px}.dialog-image-wrap img{width:100%;max-width:690px;margin:auto;box-shadow:0 6px 30px #17384c1a}.dialog-pagination{padding:16px 24px;background:white;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:.88rem}.dialog-pagination button{background:#f1f3f7;padding:10px 14px;border-radius:4px}.dialog-pagination button:disabled{opacity:.4;cursor:default}body.modal-open{overflow:hidden}
@media(min-width:1600px){.hero-grid{padding-block:90px}.cover{width:370px}}
@media(max-width:1050px){.container{width:calc(100% - 64px)}.hero-grid{gap:35px}.hero-description{font-size:1.0625rem}.hero-grid h1{font-size:4.6rem}.contents-section,.audience-section,.author-section{gap:65px}.preview-grid{gap:65px}.method-heading{gap:40px}.method-grid{gap:12px}.method-card{padding:25px 18px}.series-content{gap:45px}.actions{gap:20px}.section{padding-block:80px}}
@media(max-width:760px){.container{width:calc(100% - 40px)}.header-inner{min-height:82px;gap:15px}.nav{gap:18px;font-size:.85rem}.nav a:nth-child(3){display:none}.brand{font-size:.7rem;gap:8px}.brand-mark{width:34px;height:34px}.header-contact{font-size:.82rem}.hero-grid{grid-template-columns:1fr;gap:45px;padding-top:48px;padding-bottom:36px}.hero-grid h1{font-size:clamp(3.5rem,12vw,5.2rem);margin-top:21px}.hero-description{max-width:440px;margin-top:22px}.hero-meta{margin-top:22px}.hero-book{width:min(430px,100%);margin:auto;padding-top:10px}.cover{width:260px}.book-backdrop{width:85%;right:3%;height:90%}.book-caption{margin-top:29px}.pillars-strip{padding-block:21px}.pillars-strip>span{gap:7px;font-size:.74rem}.pillars-strip i{width:5px;height:5px}.section{padding-block:62px}.contents-section,.audience-section,.author-section{grid-template-columns:1fr;gap:28px}.chapter-list{padding-top:0}.section-intro>p:last-child{max-width:100%;margin-top:20px}.preview-section{padding-block:62px}.preview-grid{grid-template-columns:1fr;gap:35px}.preview-copy>p:not(.eyebrow){max-width:100%}.preview-tabs{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:24px}.preview-tab{padding:14px 12px;gap:10px;min-height:85px}.tab-number{display:none}.preview-tab strong{font-size:.95rem}.preview-tab small{font-size:.8rem}.tab-accent{width:3px;flex-shrink:0}.page-open{max-width:330px}.method-heading{grid-template-columns:1fr;gap:24px}.method-heading>p{max-width:100%}.method-grid{grid-template-columns:1fr 1fr;margin-top:34px;gap:14px}.method-card{padding:24px 19px}.method-symbol{margin-bottom:21px}.method-card p{font-size:.91rem}.method-card h3{font-size:1.22rem}.series-section{padding:28px;margin-bottom:62px}.series-content{grid-template-columns:1fr;gap:22px}.series-content h2{font-size:2rem}.series-label{flex-wrap:wrap;gap:12px}.author-section{padding-top:50px}.author-section h2{font-size:2.5rem}.purchase-inner{grid-template-columns:1fr;gap:35px}.purchase-actions{margin-left:0}.purchase-section{padding-block:55px}.footer{flex-wrap:wrap;padding-block:27px}.footer>span{order:3;flex-basis:100%}.dialog-toolbar{padding:12px 14px}.dialog-image-wrap{padding:18px 10px}.dialog-pagination{padding:14px 10px;font-size:.8rem}.dialog-pagination button{padding:10px}.eyebrow{font-size:.75rem}.large-copy{font-size:1.3rem}}
@media(max-width:380px){.container{width:calc(100% - 32px)}.header-contact{display:none}.nav{gap:14px}.method-grid{grid-template-columns:1fr}.pillars-strip>span{font-size:.68rem;gap:4px}.preview-tab small{font-size:.75rem}.hero-grid h1{font-size:3.3rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
.method-card p{font-size:1rem}
.brand-mark{height:auto;mix-blend-mode:multiply}
#hero-title{font-size:clamp(3.1rem,5.8vw,5.1rem);line-height:1.05}
@media(max-width:760px){#hero-title{font-size:clamp(2.7rem,10.5vw,4.5rem)}}
.header-actions{display:flex;align-items:center;gap:24px}
.language-selector{display:flex;gap:3px;border:1px solid #d8dce5;border-radius:5px;padding:3px}
.language-link{display:flex;align-items:center;justify-content:center;min-width:37px;min-height:35px;border-radius:3px;font-size:.875rem;color:var(--muted)}
.language-link[aria-current="page"]{background:var(--ink);color:white}
.language-link:not([aria-current]):hover{background:#e6e9f0;color:var(--ink)}
.book-language{font-size:.875rem;line-height:1.6;color:#654b85;margin-top:18px}
@media(max-width:760px){.nav{display:none}.header-actions{gap:18px}.language-link{min-height:36px}}
@media(max-width:420px){.header-actions .header-contact{display:none}}