@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--paper:#f4f8ff;--ink:#0c2348;--purple:#bad7ff;--lime:#b2e9ff;--cyan:#72ceff;--coral:#4b9afa;--line:#d3e0f1;--muted:#5a6d88;--white:#ffffff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:16px;line-height:1.6}button,input{font:inherit}button,a,input,summary{ -webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,video:focus-visible,audio:focus-visible{outline:3px solid #7448b7;outline-offset:5px}button{border:0}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:'Manrope',sans-serif;line-height:1.1;letter-spacing:-.045em}h2{font-size:clamp(38px,4.1vw,60px);font-weight:700}p{line-height:1.65}.section-shell{max-width:1264px;margin:auto;padding-left:48px;padding-right:48px}.site-header{max-width:1440px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:26px 48px;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;gap:13px;align-items:center;font-family:Manrope,sans-serif;font-weight:800;line-height:1.07;font-size:20px;letter-spacing:-.6px}.brand-dot{color:#845bb8}.brand-mark{width:47px;height:49px;border:1.5px solid var(--ink);border-radius:13px;background:var(--purple);font:bold italic 51px/.98 Georgia,serif;text-align:center;position:relative;padding-right:5px}.brand-mark span{position:absolute;right:3px;top:2px;font:17px Georgia}.site-header nav{display:flex;gap:32px;font-size:14px;font-weight:600}.site-header nav a:hover,.text-link:hover,.site-footer a:hover{color:#70449e}.header-cta{font-size:13px;font-weight:700;border:1px solid var(--ink);border-radius:30px;padding:11px 18px}.header-cta span{margin-left:20px}.menu-toggle{display:none;background:none;font-size:24px}.hero{display:grid;grid-template-columns:1.05fr 1fr;min-height:650px;align-items:center;padding-top:65px;padding-bottom:77px;gap:30px}.eyebrow,.tiny-label{font-size:10px;letter-spacing:1.7px;font-weight:700}.eyebrow{margin-bottom:25px}.little-star{font-size:16px;margin-right:9px;color:#2478e4}h1{font-size:clamp(55px,6.1vw,86px);font-weight:700;line-height:1.02;letter-spacing:-.065em}.highlight{position:relative;z-index:0}.highlight:after{content:'';position:absolute;background:var(--lime);height:24%;bottom:5%;left:-5%;right:-3%;z-index:-1;transform:rotate(-2deg)}.hero-description{font-size:22px;line-height:1.45;margin-top:28px;letter-spacing:-.6px}.hero-small{color:var(--muted);font-size:14px;margin-top:18px}.hero-actions{display:flex;align-items:center;gap:22px;margin-top:30px}.button{display:inline-flex;justify-content:center;align-items:center;gap:24px;min-height:48px;padding:13px 23px;border-radius:6px;font-size:12px;font-weight:700;line-height:1.4;border:1px solid var(--ink);transition:transform .2s,background .2s}.button:hover{transform:translateY(-2px)}.dark{background:var(--ink);color:var(--paper)}.outline{background:transparent}.outline:hover{background:#e2efff}.cream{background:var(--paper);color:var(--ink);border-color:var(--paper)}.text-link{font-size:12px;font-weight:700;display:inline-flex;gap:17px;align-items:center}.hero-note{font-size:11px;color:var(--muted);margin-top:23px}.note-line{font-size:24px;margin-right:8px}.hero-art{position:relative;height:490px}.art-orbit{position:absolute;border-radius:50%;width:375px;height:375px;background:#dceaff;left:50%;top:49%;transform:translate(-50%,-50%);border:1px solid #bfd6fa}.art-orbit:after{content:'';position:absolute;inset:-19px;border:1px dashed #9ebfee;border-radius:50%}.laptop-stage{position:absolute;inset:66px 0 80px;display:flex;align-items:center;justify-content:center}.laptop-stage img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 16px 7px #0c234812);transform:rotate(-7deg)}.floating-note{position:absolute;z-index:2;top:3px;left:19px;width:171px;background:#ffffff;box-shadow:4px 7px 0 #0c234814;transform:rotate(-8deg);border:1px solid var(--ink);padding:20px 17px 14px}.floating-note .tiny-label{font-size:7px;letter-spacing:1px}.floating-note strong{font:600 25px/1.1 Manrope,sans-serif;display:block;margin:13px 0 9px;letter-spacing:-1px}.note-smile{font-size:28px}.art-star{position:absolute;z-index:3;line-height:1}.star-one{font-size:78px;right:9px;top:17px;color:#277cec;transform:rotate(12deg)}.star-two{font-size:51px;left:-4px;bottom:91px;color:#3588f0}.sticker{position:absolute;right:-2px;bottom:44px;background:var(--coral);border:1px solid var(--ink);width:127px;height:127px;border-radius:50%;display:grid;place-content:center;text-align:center;font-weight:700;line-height:1.3;font-size:12px;transform:rotate(12deg)}.book-stack{position:absolute;left:54px;bottom:76px;width:230px;transform:rotate(3deg)}.book-spine{display:block;line-height:1.2;border:1px solid var(--ink);padding:11px 18px;letter-spacing:1px;font-size:9px;font-weight:700;border-radius:3px}.purple{background:var(--purple)}.coral{background:var(--coral);width:94%;margin-left:9px;font-family:Georgia;font-size:13px;letter-spacing:0}.floating-player{position:absolute;bottom:4px;right:3px;display:flex;align-items:center;gap:13px;padding:15px 18px;background:#ffffff;box-shadow:4px 6px 0 #0c234814;border:1px solid var(--ink);border-radius:10px;transform:rotate(-3deg)}.play-icon{background:var(--lime);border-radius:50%;width:37px;height:37px;display:grid;place-content:center;font-size:12px;border:1px solid var(--ink)}.floating-player strong{display:block;font-size:11px}.floating-player span:not(.play-icon):not(.wave){display:block;font-size:8px;margin-top:3px;color:var(--muted)}.wave{color:#2278e5;letter-spacing:2px;font-size:19px}.ticker{display:flex;justify-content:center;align-items:center;gap:45px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);padding:16px 22px;background:var(--lime);font-size:10px;font-weight:700;letter-spacing:1.3px;overflow:hidden;white-space:nowrap}.ticker b{font-size:19px;font-weight:400}.learn-section{padding-top:91px;padding-bottom:92px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:36px}.section-heading .eyebrow{margin-bottom:15px}.section-heading>p{font-size:13px;color:var(--muted);padding-bottom:4px}.feature-grid{display:grid;grid-template-columns:1.65fr 1fr;gap:24px}.featured-video{padding:24px;background:var(--ink);border-radius:12px;color:var(--paper)}.feature-title{display:flex;gap:14px;align-items:center;margin-bottom:20px}.pill{border:1px solid currentColor;border-radius:30px;padding:3px 9px;font-size:8px;letter-spacing:1px;white-space:nowrap}.feature-title .pill{background:var(--lime);border-color:var(--lime);color:var(--ink)}.feature-title .tiny-label{font-size:8px;color:#c3d9ff}.featured-video video{display:block;width:100%;aspect-ratio:16/9;border-radius:5px;background:#fff8ed;object-fit:cover}.video-caption{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:21px}.video-caption h3{font-size:22px;line-height:1.25;letter-spacing:-.6px}.round-arrow{width:40px;height:40px;display:grid;place-items:center;border:1px solid currentColor;border-radius:50%;font-size:23px;background:none;flex-shrink:0}.study-note{background:var(--purple);border:1px solid var(--ink);border-radius:12px;padding:33px;position:relative}.study-note .eyebrow{font-size:8px;margin-top:24px;margin-bottom:20px}.hand-star{font-size:48px;line-height:1}.study-note h3{font-size:42px;font-weight:600;letter-spacing:-2px}.study-note>p:not(.eyebrow){font-size:12px;margin-top:21px;max-width:230px}.stats{display:flex;gap:42px;margin:24px 0 22px;padding-top:20px;border-top:1px solid #0c234840}.stats strong{font:600 33px/1.1 Manrope,sans-serif;display:block}.stats span{font-size:10px}.library{padding-top:65px}.library-top{display:flex;justify-content:space-between;gap:20px;align-items:center}.library-top h3{font-size:25px}.muted{color:var(--muted);font-size:12px}.library-top p{margin-top:8px}.search-wrap{position:relative;width:340px}.search-wrap input{background:transparent;border:1px solid #a9bedb;padding:13px 17px 13px 42px;width:100%;border-radius:7px;font-size:12px;color:var(--ink);height:46px}.search-wrap svg{position:absolute;left:14px;top:14px;width:17px;height:17px;stroke:var(--ink);fill:none;stroke-width:1.5}.filter-row{display:flex;gap:15px;justify-content:space-between;align-items:center;margin:27px 0 25px}.filters{display:flex;flex-wrap:wrap;gap:8px}.filter{background:transparent;padding:8px 13px;border-radius:25px;border:1px solid #b9cee8;font-size:10px;min-height:36px}.filter.active{background:var(--ink);border-color:var(--ink);color:var(--paper)}#result-count{font-size:9px;letter-spacing:.5px;white-space:nowrap}.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.lesson-card{border:1px solid #d4e1f3;border-radius:9px;overflow:hidden;background:var(--white);display:flex;flex-direction:column}.lesson-thumb{position:relative;border-bottom:1px solid #d4e1f3;background:#eee7f2;aspect-ratio:16/9;overflow:hidden;cursor:pointer}.lesson-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}.lesson-thumb:hover img{transform:scale(1.04)}.lesson-duration{position:absolute;bottom:10px;right:10px;background:var(--ink);color:white;border-radius:3px;padding:2px 7px;font-size:9px}.complete-badge{position:absolute;top:10px;left:10px;border-radius:3px;background:var(--lime);font-size:8px;padding:4px 7px}.lesson-body{padding:18px;display:flex;flex:1;flex-direction:column}.lesson-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:8px;letter-spacing:1px;margin-bottom:13px}.lesson-body h4{font:700 17px/1.35 Manrope,sans-serif;letter-spacing:-.4px;margin:0 0 22px;min-height:46px}.lesson-actions{display:flex;justify-content:space-between;align-items:center;margin-top:auto;border-top:1px solid #e3ebf7;padding-top:13px}.lesson-open{background:none;padding:0;font-size:11px;font-weight:700}.lesson-check{background:none;border:1px solid #bdd1eb;border-radius:50%;width:27px;height:27px;font-size:13px}.lesson-check.done{background:var(--lime);border-color:var(--ink)}.library-bottom{text-align:center;margin-top:31px}.library-bottom p{font-size:10px;color:var(--muted);margin-top:19px}.download-strip{display:flex;justify-content:space-between;align-items:center;gap:25px;margin-top:53px;border-top:1px solid var(--line);padding-top:34px}.download-strip h3{font-size:22px;margin:8px 0}.download-strip p{font-size:11px;color:var(--muted)}.download-actions{display:flex;flex-wrap:wrap;gap:10px;max-width:360px}.download-actions .button{font-size:10px;padding:11px 14px;min-height:40px}.download-actions small{width:100%;font-size:9px;color:var(--muted)}.poetry-section{background:var(--purple);border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.poetry-grid{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center;padding-top:87px;padding-bottom:88px}.poetry-grid 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var(--line);padding-top:14px}.books-section{padding-top:91px;padding-bottom:90px}.books-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px}.cover-scene{height:390px;display:grid;place-content:center;border-radius:10px;position:relative;border:1px solid #d8dacd}.cover-poetry{background:#e5efff}.cover-fiction{background:#f2d5bd}.book-object{width:195px;height:285px;box-shadow:12px 16px 20px #0c234827;transform:rotate(-9deg);position:relative;border-radius:0 4px 4px 0;border-left:7px solid #171f21;background:#253a41}.book-object:after{content:'';position:absolute;right:-7px;top:4px;bottom:3px;width:7px;background:repeating-linear-gradient(#ece1cc 0 1px,#f4f8ff 1px 3px);border-radius:0 4px 4px 0;z-index:-1}.book-cover{padding:22px 19px;height:100%;color:#ecdfb8;position:relative}.book-cover>span{font-size:6px;letter-spacing:2px}.book-cover h3{font-family:Georgia,serif;font-weight:400;letter-spacing:-1px;font-size:39px;line-height:1.02;margin-top:20px}.book-cover h3 em{font-size:38px;font-weight:400}.book-cover>small{position:absolute;bottom:22px;font-size:6px;letter-spacing:2px}.fireflies{position:absolute;bottom:45px;right:18px;color:#e6e69d;font-size:25px;line-height:1;transform:rotate(20deg)}.cover-fiction .book-object{background:#c5523b;border-left-color:#943827;transform:rotate(8deg)}.cover-fiction .book-cover{color:#fff0c9}.cover-fiction .book-cover h3{font-size:35px}.little-window{display:grid;grid-template-columns:1fr 1fr;width:42px;height:45px;gap:4px;position:absolute;bottom:47px;right:21px;transform:rotate(-3deg)}.little-window i{background:#f9cf79;opacity:.9;border-radius:7px 7px 0 0}.concept-label{font-size:7px;letter-spacing:1.8px;position:absolute;bottom:17px;left:22px;color:var(--muted)}.book-details{display:flex;justify-content:space-between;align-items:center;margin-top:24px;gap:16px}.book-details .tiny-label{font-size:8px;color:var(--muted)}.book-details h3{font-size:25px;margin-top:9px}.book-project>p{margin-top:11px}.about-section{padding-bottom:90px;display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.about-portrait{min-height:360px;background:var(--lime);border:1px solid var(--ink);border-radius:50% 50% 8px 8px;display:flex;align-items:center;justify-content:center;position:relative}.hello{font:italic 71px/1 Georgia,serif;letter-spacing:-4px;transform:rotate(-9deg)}.hello>span{font-style:normal;font-size:64px;position:absolute;right:-69px;top:-4px;color:#2874db}.portrait-caption{position:absolute;bottom:29px;font-size:8px;letter-spacing:1.6px}.about-copy h2{font-size:46px}.about-copy>p:not(.eyebrow){font-size:13px;margin-top:21px;color:var(--muted)}.about-copy .text-link{margin-top:25px}.closing{padding:65px 24px 70px;text-align:center;color:var(--paper);background:var(--ink);position:relative}.closing>span{font-size:46px;color:var(--lime);line-height:1}.closing h2{margin:18px 0 28px;font-size:49px;font-weight:500}.site-footer{padding-top:48px;padding-bottom:26px;display:flex;align-items:center;flex-wrap:wrap;gap:21px;justify-content:space-between}.footer-brand{font:800 23px/1 Manrope,sans-serif;letter-spacing:-1px}.footer-brand span{color:#8660af}.site-footer>p{font-size:11px;color:var(--muted)}.site-footer nav{display:flex;gap:20px;font-size:10px}.footer-bottom{width:100%;border-top:1px solid var(--line);margin-top:11px;padding-top:20px;display:flex;justify-content:space-between;font-size:9px;color:var(--muted)}dialog{background:var(--paper);color:var(--ink);border:1px solid var(--ink);border-radius:14px;width:min(790px,calc(100% - 28px));max-height:90dvh;padding:36px;box-shadow:0 20px 100px #0004}dialog::backdrop{background:#03162ddb;backdrop-filter:blur(4px)}.dialog-close{position:sticky;top:0;float:right;border:1px solid var(--ink);background:var(--paper);border-radius:50%;width:34px;height:34px;z-index:2;font-size:25px;line-height:1}.dialog-heading{font-size:32px;line-height:1.2;margin:20px 0}.dialog-meta{display:flex;gap:13px;flex-wrap:wrap;color:var(--muted);font-size:11px}.lesson-audio{width:100%;margin:25px 0 12px}.dialog-tools{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:12px 0 30px}.dialog-tools a{font-size:11px;text-decoration:underline}.dialog-tools button{font-size:11px;background:var(--lime);padding:10px 15px;border:1px solid var(--ink);border-radius:5px}.transcript{border-top:1px solid var(--line);padding-top:21px}.transcript summary{font-weight:700;font-size:15px;cursor:pointer}.transcript-section{padding-top:25px}.transcript-section h3{font-size:16px;margin-bottom:10px;letter-spacing:-.3px}.transcript-section p{font-size:14px;color:#435b7a}.transcript-section.challenge{background:#e5f1ff;padding:20px;border-radius:7px;margin-top:20px}.empty-state{grid-column:1/-1;padding:50px 20px;text-align:center;border:1px dashed var(--line);border-radius:10px}.empty-state h4{font-size:22px;margin:0 0 10px}.empty-state p{font-size:13px;color:var(--muted)}#book-dialog{max-width:560px;padding:42px}#book-dialog h2{font-size:38px;margin:20px 0}#book-dialog>p{font-size:14px;margin-bottom:20px}#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--ink);color:var(--paper);padding:12px 22px;border-radius:7px;font-size:12px;z-index:20;transition:transform .2s}#toast.visible{transform:translateX(-50%) 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/* Blue technical-education redesign */
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@media(max-width:760px){.future-teaser{padding:22px}.teaser-illustration{height:110px}.teaser-bottom h3{font-size:32px}.teaser-top>span:last-child{font-size:23px}}
@media(max-width:360px){.future-teaser{padding:20px}.teaser-illustration{height:80px;margin-top:0}.teaser-illustration svg{height:90px;width:180px}.teaser-bottom h3{font-size:29px;margin-top:8px}.teaser-bottom>p:last-child{font-size:9px;line-height:1.5;margin-top:8px}.teaser-bottom .tiny-label{font-size:5px}}

.lesson-video{display:block;width:100%;aspect-ratio:16/9;max-height:55vh;object-fit:contain;background:#071a35;border-radius:14px;margin:20px 0 16px}.audio-option{margin:12px 0 20px;padding:14px 16px;background:#edf4ff;border-radius:12px}.audio-option summary{cursor:pointer;font-weight:700;color:#143f7b}.audio-option audio{width:100%;margin-top:14px}

.site-footer nav{flex-wrap:wrap}.site-footer nav a[href^="mailto:"]{flex-basis:100%;white-space:normal;line-height:1.6}

/* Study Companion product preview */
.study-product{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1fr);gap:clamp(28px,6vw,90px);align-items:center;padding-top:80px;padding-bottom:90px;scroll-margin-top:100px}.study-product-art{padding:22px;background:#dcefff;border:1px solid #bbd9ff;border-radius:24px;transform:rotate(-2deg)}.study-product-art img{display:block;width:100%;height:auto;border-radius:8px;box-shadow:0 15px 40px #10336924}.study-product-copy h2{margin:20px 0;font-size:clamp(38px,5vw,62px);line-height:1.05}.study-product-copy h3{font-size:24px;margin-bottom:16px}.study-product-copy p,.study-product-copy li{line-height:1.7}.study-product-copy ul{padding-left:20px;margin:20px 0}.study-product-copy li{margin-bottom:7px}.study-price{padding:18px 0;border-top:1px solid #bdd8f6}.study-price strong{font-size:27px;color:#1255bc}.study-price span{display:block;font-size:13px;color:#526680}.study-product-copy .button{max-width:100%;white-space:normal;text-align:center}.study-availability{font-size:14px;color:#526680;margin:18px 0}.study-product-copy small{display:block;line-height:1.6;color:#526680}@media(max-width:760px){.study-product{grid-template-columns:1fr;padding-top:48px;padding-bottom:56px}.study-product-art{max-width:380px;margin:auto;transform:none}.study-product-copy h2{font-size:42px}}

.purchase-form{margin-top:22px;padding:20px;border:1px solid #bdd8f6;border-radius:15px;background:#edf6ff}.purchase-form label{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.6}.purchase-form input{width:21px;height:21px;flex-shrink:0;margin-top:4px}.purchase-form button{margin-top:20px;cursor:pointer}.purchase-form a{text-decoration:underline}