:root{
  --navy:#07142f;--navy2:#0b1b3d;--ink:#101936;--teal:#1fa9bf;--violet:#7250b5;
  --lav:#bca7e7;--ice:#dcebf3;--paper:#f8f7fb;--line:#d8d3e7;--muted:#6f7182;--white:#fff;
  --shadow:0 16px 44px rgba(15,27,58,.10)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper)}
a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.shell{width:min(1180px,calc(100% - 40px));margin:auto}
header{position:sticky;top:0;z-index:20;background:rgba(5,16,40,.97);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.07)}
.nav{height:78px;display:flex;align-items:center;gap:34px;color:#fff}.brand{display:flex;align-items:center;min-width:270px}.brand img{width:250px;max-height:62px;object-fit:contain;object-position:left center;display:block}
.navlinks{display:flex;gap:30px;margin-left:auto;font-size:14px;letter-spacing:.055em}.navlinks a{opacity:.8;padding:28px 0 24px;position:relative}.navlinks a:hover,.navlinks a.active{opacity:1}.navlinks a.active:after{content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;background:linear-gradient(90deg,var(--teal),var(--violet))}
.navicons{display:flex;gap:14px;margin-left:14px}.iconbtn{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;border:0;background:transparent;color:#fff;cursor:pointer}.iconbtn:hover{background:rgba(255,255,255,.07)}.menu{display:none}.mobile-panel{display:none}
.hero{background:var(--navy);color:#fff;overflow:hidden}.hero-wrap{min-height:380px;display:grid;grid-template-columns:44% 56%;align-items:stretch}.hero-copy{padding:64px 0 58px;z-index:2}.eyebrow{font-size:13px;letter-spacing:.32em;text-transform:uppercase;color:#9dd9ed;font-weight:800}
h1{font-size:clamp(44px,5vw,70px);font-weight:450;line-height:.98;margin:17px 0 20px;letter-spacing:-.035em}.hero-rule{width:72px;height:2px;background:linear-gradient(90deg,var(--teal),var(--violet));margin:20px 0 22px}.hero-copy p{font-size:19px;line-height:1.55;max-width:500px;color:#e5e7ef;margin:0 0 28px}.hero-art{position:relative;min-height:380px}.hero-art:before{content:"";position:absolute;inset:0;background-image:linear-gradient(90deg,var(--navy) 0%,rgba(7,20,47,.23) 22%,rgba(7,20,47,0) 50%),url('assets/hero-flow.png');background-size:cover;background-position:center}
.cta,.softbtn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:7px;padding:13px 22px;font-weight:750;letter-spacing:.04em}.cta{color:#fff;background:linear-gradient(90deg,var(--teal),#557ad2,var(--violet));box-shadow:0 10px 28px rgba(82,70,183,.24)}.cta:hover{filter:brightness(1.05);transform:translateY(-1px)}
.section{padding:40px 0}.section.white{background:#fff}.section-head{text-align:center;margin-bottom:26px}.section-head .small{color:#9270ca;font-size:12px;font-weight:800;letter-spacing:.23em;text-transform:uppercase}.section-head h2{font-size:34px;font-weight:450;margin:7px 0 0;letter-spacing:-.02em}.section-head h2:after{content:"";display:block;width:58px;height:2px;background:linear-gradient(90deg,var(--teal),var(--violet));margin:12px auto 0}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.category-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 8px 24px rgba(40,31,84,.04);transition:.18s ease}.category-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.category-icon{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:#f0ecfb;color:#7250b5;font-size:20px}.category-card h3{margin:14px 0 7px;font-size:20px}.category-card p{color:#606477;line-height:1.5;margin:0 0 15px}.textlink{font-size:13px;font-weight:800;color:#5f49a7;letter-spacing:.04em}
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.products.four{grid-template-columns:repeat(4,1fr)}.books-grid{grid-template-columns:repeat(3,1fr);max-width:1080px;margin:auto}.product{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:0 7px 24px rgba(40,31,84,.03);display:flex;flex-direction:column}.product-image{border-radius:10px;overflow:hidden;background:#111;aspect-ratio:4/3}.product-image.cover{background:linear-gradient(145deg,#eef0f5,#d8dbe5);display:grid;place-items:center}.product-image.cover.dark{background:linear-gradient(145deg,#18283b,#07142f)}.product-image.cover img{height:100%;width:auto;max-width:100%;object-fit:contain;display:block;filter:drop-shadow(0 10px 14px rgba(0,0,0,.18))}.product-image.software img{width:100%;height:100%;object-fit:cover;display:block}.product-copy{padding:16px 7px 7px;display:flex;flex:1;flex-direction:column}.product-type{font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:#9a72cf;font-weight:800}.product h3{font-size:21px;line-height:1.18;margin:9px 0 8px}.product p{margin:0 0 16px;line-height:1.5;color:#43485a;font-size:14px}.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}.outline{display:inline-flex;text-align:center;border:1px solid #9c78ca;border-radius:5px;padding:9px 12px;font-size:11px;letter-spacing:.07em;text-transform:uppercase;font-weight:800;background:#fff}.outline:hover{background:#f8f2ff}.outline.teal{border-color:#4bb4ca}.badge{display:inline-block;background:#eee8fb;color:#6448a8;border-radius:99px;padding:5px 9px;font-size:10px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;margin-left:7px}
.page-hero{background:linear-gradient(135deg,var(--navy),#112354);color:#fff;padding:52px 0}.page-hero .eyebrow{color:#b9dfe9}.page-hero h1{font-size:clamp(38px,5vw,58px);margin:9px 0 13px}.page-hero p{font-size:18px;line-height:1.55;max-width:720px;color:#dfe3ee;margin:0}.page-body{padding:40px 0 52px}.prose{max-width:800px;line-height:1.7;color:#34394c}.prose h2{font-size:28px;margin-top:30px}.prose p{margin:0 0 17px}.split{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}
.detail-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.detail-cover{background:linear-gradient(145deg,#eef0f5,#d8dbe5);border-radius:12px;padding:20px;display:grid;place-items:center;min-height:470px}.detail-cover img{max-width:100%;max-height:470px;object-fit:contain;filter:drop-shadow(0 15px 18px rgba(0,0,0,.2))}.detail-cover.dark-cover{background:linear-gradient(145deg,#24394d,#08162f)}.detail-software{border-radius:12px;overflow:hidden}.detail-software img{width:100%;display:block}.meta{color:#6b6f7e;font-size:13px}.notice{background:#f2eefb;border:1px solid #ddd3f2;border-radius:10px;padding:14px 16px;color:#51466f;margin:18px 0}.book-list{margin:0 0 22px;padding-left:22px}.book-list li{margin:7px 0;line-height:1.55}
.book-quote{margin:24px 0;background:linear-gradient(135deg,#f2eefb,#eef1f9);border:1px solid var(--line);border-left:5px solid #557ad2;border-radius:0 12px 12px 0;padding:20px 22px;color:#34394c;box-shadow:0 8px 22px rgba(82,70,183,.10)}.prose .book-quote p{margin:0 0 15px}.prose .book-quote p:last-child{margin-bottom:0}.prose .book-quote .book-quote-opening{font-size:18px;font-weight:750;color:var(--navy)}
.contact-form{max-width:680px}.field{display:grid;gap:7px;margin-bottom:16px}.field label{font-size:13px;font-weight:750}.field input,.field textarea{border:1px solid #cbc7d8;border-radius:8px;padding:12px;background:#fff}.field textarea{min-height:150px;resize:vertical}

.newsletter{background:#fff;padding:34px 0;border-top:1px solid var(--line)}.newsletter-wrap{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;background:linear-gradient(135deg,#f4f0fb,#eef8fb);border:1px solid #d8d3e7;border-radius:16px;padding:28px 30px;box-shadow:0 8px 24px rgba(40,31,84,.05)}.newsletter .small{color:#9270ca;font-size:11px;font-weight:800;letter-spacing:.2em;text-transform:uppercase}.newsletter h2{font-size:28px;font-weight:500;letter-spacing:-.02em;margin:6px 0 8px}.newsletter p{margin:0;max-width:760px;color:#555b70;line-height:1.55}.newsletter .cta{white-space:nowrap}
.info{background:var(--navy);color:#fff;border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08)}.info-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:20px 0}.info-item{display:flex;gap:14px;padding:0 22px;border-right:1px solid rgba(255,255,255,.14)}.info-item:last-child{border-right:0}.bubble{flex:0 0 42px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#101e43;color:#c9a8ee;font-size:20px}.info-item h4{margin:1px 0 5px;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:#d7c7ef}.info-item p{margin:0;color:#c7cad4;font-size:12px;line-height:1.45}
footer{background:#07142f;color:#d7d9e2;padding:30px 0 25px}.footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:42px;align-items:start}.footer-logo img{width:230px;max-width:100%;display:block}.foot-title{color:#fff;font-size:11px;letter-spacing:.15em;text-transform:uppercase;margin-bottom:10px;font-weight:800}.foot-col a{display:block;color:#c8cbd5;font-size:13px;margin:7px 0}.foot-col a:hover{color:#fff}.copyright{text-align:center;color:#6f7892;font-size:11px;margin-top:24px}.tiny{font-size:10px;color:#777d91;text-align:center;margin-top:10px}
@media(max-width:1050px){.products.four{grid-template-columns:1fr 1fr}}
@media(max-width:900px){.navlinks,.navicons .hide-mobile{display:none}.menu{display:grid;margin-left:auto}.brand{min-width:0}.brand img{width:220px}.hero-wrap{grid-template-columns:1fr}.hero-copy{padding:52px 0 44px}.hero-art{min-height:245px}.hero-art:before{background-image:linear-gradient(180deg,var(--navy) 0%,rgba(7,20,47,.16) 35%,transparent 66%),url('assets/hero-flow.png')}.products,.category-grid{grid-template-columns:1fr 1fr}.info-grid{grid-template-columns:1fr 1fr;row-gap:20px}.info-item:nth-child(2){border-right:0}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-grid .last{grid-column:2/4}.split{grid-template-columns:1fr}.detail-cover{min-height:380px}}
@media(max-width:760px){.newsletter-wrap{grid-template-columns:1fr}.newsletter .cta{justify-self:start}}
@media(max-width:620px){.shell{width:min(100% - 28px,1180px)}.nav{height:70px}.brand img{width:195px}.hero-copy p{font-size:17px}.hero-art{min-height:205px}.products,.category-grid{grid-template-columns:1fr}.section-head h2{font-size:29px}.info-grid{grid-template-columns:1fr}.info-item{border-right:0;padding:8px 4px}.footer-grid{grid-template-columns:1fr 1fr;gap:26px}.footer-grid .footer-logo{grid-column:1/3}.footer-grid .last{grid-column:auto}.mobile-panel{display:none;position:absolute;top:70px;left:0;right:0;background:#081630;border-top:1px solid rgba(255,255,255,.08);padding:10px 20px 20px}.mobile-panel.open{display:block}.mobile-panel a{display:block;color:#fff;padding:12px 5px;border-bottom:1px solid rgba(255,255,255,.08)}.detail-cover{min-height:310px}}

.preview-section{margin-top:34px}.preview-section h2{font-size:28px;margin:0 0 8px}.preview-section>p{margin:0 0 18px;color:#5b6070;line-height:1.6}.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.preview-grid figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px;box-shadow:0 6px 18px rgba(40,31,84,.04)}.preview-grid img{display:block;width:100%;aspect-ratio:1/1;object-fit:contain;background:#fff;border-radius:8px}.coming-button{display:inline-flex;text-align:center;border:1px solid #c9cbd4;border-radius:5px;padding:9px 12px;font-size:11px;letter-spacing:.07em;text-transform:uppercase;font-weight:800;background:#f5f5f7;color:#777b89;cursor:default}
@media(max-width:900px){.preview-grid{grid-template-columns:1fr 1fr}}

.workbook-preview{margin:32px 0 22px}.workbook-preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.workbook-preview-grid figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;box-shadow:0 6px 18px rgba(40,31,84,.04)}.workbook-preview-grid img{display:block;width:100%;height:auto;background:#fff;border-radius:7px}@media(max-width:700px){.workbook-preview-grid{grid-template-columns:1fr}}

/* Workbook cover-area preview scroller */
.cover-preview{margin-top:16px;padding-top:15px;border-top:1px solid var(--line)}
.cover-preview-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 2px 10px;font-size:13px}
.cover-preview-head strong{font-size:14px;color:var(--ink)}
.cover-preview-head span{font-size:11px;color:#777d91;text-transform:uppercase;letter-spacing:.08em;font-weight:800}
.cover-preview-track{display:flex;gap:10px;overflow-x:auto;padding:2px 2px 10px;scroll-snap-type:x proximity;overscroll-behavior-inline:contain;scrollbar-width:thin;scrollbar-color:#b8aed3 transparent}
.cover-preview-track::-webkit-scrollbar{height:7px}
.cover-preview-track::-webkit-scrollbar-track{background:transparent}
.cover-preview-track::-webkit-scrollbar-thumb{background:#b8aed3;border-radius:99px}
.cover-preview-track a{flex:0 0 165px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:10px;padding:7px;box-shadow:0 5px 14px rgba(40,31,84,.05);transition:.16s ease}
.cover-preview-track a:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(40,31,84,.09)}
.cover-preview-track img{display:block;width:100%;height:215px;object-fit:contain;background:#fff;border-radius:6px}
.cover-preview-note{font-size:11px;color:#777d91;margin:1px 2px 0}
@media(max-width:900px){.cover-preview-track a{flex-basis:155px}.cover-preview-track img{height:205px}}
@media(max-width:620px){.cover-preview-track a{flex-basis:140px}.cover-preview-track img{height:185px}}