@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600&family=Nunito:wght@400;600;700;800;900&display=swap');
:root{--ink:#25304c;--purple:#7445bb;--orange:#f47826;--muted:#697185;--line:#e6e7eb}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:#fff;color:var(--ink);font:600 18px/1.65 'Nunito',sans-serif}a{color:inherit;text-decoration:none}a:focus-visible,summary:focus-visible{outline:3px solid var(--purple);outline-offset:6px}.wrap{width:min(1080px,calc(100% - 64px));margin:auto}header{border-bottom:2px solid var(--line);background:#fffffff5;position:sticky;top:0;z-index:10}.nav{height:90px;display:flex;align-items:center;justify-content:space-between;gap:28px}.logo{display:flex;align-items:center}.logo img{width:130px;height:74px;object-fit:contain}nav{display:flex;gap:30px;font-size:15px;font-weight:800;color:var(--muted)}nav a:hover{color:var(--purple)}.button{display:inline-flex;justify-content:center;align-items:center;min-height:52px;padding:13px 26px;background:var(--purple);border:2px solid var(--purple);border-radius:15px;box-shadow:0 4px 0 #502a8b;color:white;font-size:14px;font-weight:900;letter-spacing:1px;text-transform:uppercase;transition:transform .15s,background .15s}.button:hover{background:#8455cb}.button:active{transform:translateY(3px);box-shadow:0 1px 0 #502a8b}.button.secondary{background:white;border-color:var(--line);color:var(--purple);box-shadow:0 4px 0 var(--line)}.button.secondary:hover{background:#f9f6fd}.button.compact{font-size:12px;min-height:44px;padding:10px 20px}.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:90px;min-height:640px;padding-top:80px;padding-bottom:90px}.hero-visual{position:relative}.hero-visual img{display:block;width:100%;height:auto}.hello,.speech{background:white;border:2px solid var(--line);border-radius:18px;padding:12px 20px;font-weight:800;font-size:16px;position:absolute;box-shadow:0 3px 0 var(--line)}.hello{top:-45px;right:0;transform:rotate(4deg)}.hero-copy{text-align:center}.eyebrow{font-size:12px;letter-spacing:1.6px;font-weight:900;color:var(--muted);margin:0 0 19px}h1,h2,h3{font-family:'Fredoka',sans-serif;font-weight:500;line-height:1.15;margin:0;letter-spacing:-.4px}h1{font-size:43px}h2{font-size:42px}h3{font-size:26px}em{font-style:normal;color:var(--purple)}.hero-copy>p:not(.eyebrow){font-size:18px;color:var(--muted);margin:23px 0 28px}.hero-copy .button{width:100%;max-width:345px;margin-bottom:15px}.micro{display:block;font-size:12px;color:var(--muted);margin-top:4px}.subjects{border-block:2px solid var(--line)}.subjects>.wrap{display:flex;justify-content:space-around;gap:24px;padding:22px 0;font-size:14px;letter-spacing:1.5px;font-weight:900;color:#74788b}.feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:100px;padding-top:110px;padding-bottom:110px;border-bottom:2px solid var(--line)}.feature-copy>p:not(.eyebrow){color:var(--muted);margin:24px 0 0}.feature-copy .takeaway{color:var(--ink)!important;font-weight:900}.island-visual img{display:block;width:115%;height:auto;margin-left:-7.5%}.place-label{display:block;text-align:center;font-size:12px;letter-spacing:1.2px;color:var(--purple);font-weight:900;margin-top:16px}.fyx-visual{position:relative;text-align:center}.fyx-visual img{width:min(100%,325px);height:auto;display:block;margin:auto}.speech{top:5%;left:-12%;transform:rotate(-5deg)}.delighted img{width:100%}.practice{padding-top:100px;padding-bottom:90px}.section-intro{text-align:center;max-width:720px;margin:auto}.section-intro>p:not(.eyebrow){color:var(--muted);margin:24px 0 0}.learning-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:55px;text-align:center}.math-symbol{display:inline-flex;height:70px;min-width:85px;align-items:center;justify-content:center;color:var(--purple);font-family:'Fredoka',sans-serif;font-size:36px;margin-bottom:18px}.learning-grid p{font-size:17px;color:var(--muted);margin:15px 0 0}.progression{border-top:2px solid var(--line);padding-top:28px;margin:40px 0 0;text-align:center;font-size:15px;color:var(--muted)}.progression span{padding:0 12px;color:#b6b9c2}.progression strong{color:var(--purple)}.characters-section{background:#f6f3fc;padding:85px 0 35px;border-block:2px solid #ece6f5}.characters{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:35px;align-items:end}.characters figure{margin:0;overflow:hidden;border-bottom:3px solid #ded3f0}.characters img{display:block;width:135%;height:auto;margin-left:-17.5%;transition:transform .25s}.characters figure:hover img{transform:translateY(-7px)}.collection-caption{text-align:center;color:var(--muted);font-size:13px;margin:24px 0 0}.faq{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;padding-top:90px;padding-bottom:100px}.faq h2{font-size:36px}.faq>div{border-top:2px solid var(--line)}details{padding:22px 0;border-bottom:2px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-size:17px;font-weight:900}summary::-webkit-details-marker{display:none}summary:after{content:'+';color:var(--purple);font-size:23px;line-height:1.2}details[open] summary:after{content:'−'}details p{color:var(--muted);font-size:16px;margin:15px 20px 0 0}.closing{background:#6339a4;color:white;text-align:center;padding:85px 0 95px}.closing .eyebrow{color:#dfd1f7}.closing em{color:#ffdb96}.closing .button{background:#fff;color:var(--purple);border-color:#fff;box-shadow:0 4px 0 #cfc0e8;margin-top:35px;min-width:270px}footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:22px;padding-bottom:22px}footer p,footer>span{font-size:12px;color:var(--muted)}footer .logo img{width:105px;height:65px}.skip{position:absolute;top:-100px;left:20px;background:white;padding:12px;z-index:20}.skip:focus{top:12px}@media(max-width:1000px){.hero,.feature{gap:50px}.hero{min-height:570px}.hero-visual img{width:105%}h1{font-size:38px}h2{font-size:37px}.speech{left:0;top:-35px}.feature{padding-top:85px;padding-bottom:85px}.faq{gap:40px}.progression span{padding:0 5px}}@media(max-width:700px){.wrap{width:calc(100% - 40px)}.nav{height:76px;gap:15px}.logo img{width:105px;height:65px}.nav nav{gap:16px;font-size:13px}.nav nav a:nth-child(2){display:none}.nav>.button{display:none}.hero{grid-template-columns:1fr;gap:28px;padding-top:65px;padding-bottom:48px;min-height:0}.hero-visual{width:min(85%,310px);margin:auto}.hero-visual img{width:100%}.hello{font-size:13px;padding:8px 13px;top:-30px}.hero-copy .eyebrow{font-size:10px}h1{font-size:37px}h2{font-size:35px}.hero-copy>p:not(.eyebrow){font-size:17px}.subjects>.wrap{display:grid;grid-template-columns:1fr 1fr;text-align:center;gap:12px;font-size:12px;padding:20px 0}.feature{grid-template-columns:1fr;gap:38px;padding-top:58px;padding-bottom:58px}.feature-copy{order:0}.feature>div:not(.feature-copy){order:1}.feature-copy p{font-size:17px}.island-visual{width:90%;margin:auto}.fyx-visual{margin-top:15px}.fyx-visual img{max-width:270px}.speech{left:0;top:-10px;font-size:14px}.delighted img{max-width:320px}.practice{padding:60px 0}.learning-grid{grid-template-columns:1fr;gap:28px;margin-top:30px}.math-symbol{height:45px;margin-bottom:8px}.learning-grid p{max-width:310px;margin:10px auto}.progression{font-size:14px;line-height:2}.progression strong{display:block}.characters-section{padding-top:55px}.characters{grid-template-columns:repeat(2,1fr);gap:20px 10px}.section-intro br{display:none}.section-intro>p:not(.eyebrow){font-size:17px}.characters img{width:125%;margin-left:-12.5%}.faq{grid-template-columns:1fr;gap:30px;padding-top:60px;padding-bottom:60px}.faq h2{font-size:34px}.closing{padding:60px 0 65px}.closing h2{font-size:34px}footer{flex-wrap:wrap;gap:10px}footer p{order:3;flex-basis:100%;margin:0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}



.store-buttons{display:flex;gap:12px;justify-content:center;margin:0 0 12px}.store-button{flex:1;background:#25304c;color:#fff;border:0;border-radius:13px;padding:12px 18px;text-align:left;font-family:inherit;min-height:66px}.store-button small{display:block;font-size:12px}.store-button strong{display:block;font-size:22px;line-height:1.3}.store-button:disabled{opacity:.8;cursor:not-allowed}.hero-copy .store-note{font-size:12px!important;margin:0 0 20px!important}.signup{padding-top:85px;padding-bottom:85px;display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:center}.signup h2{font-size:34px}.signup p{color:var(--muted);font-size:16px}.signup form{display:grid;gap:16px}.signup label{font-size:15px;font-weight:800}.signup input[type=email]{width:100%;padding:15px 17px;border:2px solid var(--line);border-radius:12px;font:inherit;background:#fff;color:var(--ink)}.signup input:focus-visible{outline:3px solid var(--purple);outline-offset:3px}.consent{display:flex;align-items:flex-start;gap:10px}.consent input{margin-top:5px;accent-color:var(--purple);width:18px;height:18px;flex-shrink:0}.consent span{font-size:14px;font-weight:600}.signup button:disabled{opacity:.55;cursor:not-allowed}.signup #signup-status{font-size:13px;margin:0}@media(max-width:700px){.signup{grid-template-columns:1fr;padding-top:55px;padding-bottom:55px;gap:25px}.signup h2{font-size:31px}.store-button{padding:12px}.store-button strong{font-size:20px}}

/* Store badges matching the supplied visual reference. */
.store-buttons{gap:18px;align-items:stretch}.store-button{display:flex;align-items:center;justify-content:center;gap:15px;background:#fff;color:#505050;border:2px solid #e3e3e3;border-radius:19px;box-shadow:0 5px 0 #e3e3e3;padding:15px 18px;min-height:86px;font-family:'Nunito',sans-serif}.store-button:disabled{opacity:1}.store-icon{width:39px;height:46px;flex-shrink:0}.store-label{display:block;white-space:nowrap}.store-button small{font-size:14px;font-weight:900;line-height:1.4}.store-button strong{font-size:23px;font-weight:900;line-height:1.35}.store-buttons{margin-bottom:18px}@media(max-width:700px){.store-buttons{gap:12px}.store-button{gap:9px;padding:12px 10px;border-radius:16px;min-height:76px}.store-icon{width:29px;height:37px}.store-button small{font-size:11px}.store-button strong{font-size:18px}}

.learning-icon{display:block;width:100px;height:100px;object-fit:contain;margin:0 auto 18px}

.learning-icon{width:130px;height:130px}

/* Full-width structure; only content has a max-width. */
.nav{width:100%;max-width:none;padding-inline:72px;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:24px}
.nav>.logo{justify-self:start}.nav>nav{justify-self:center}.nav>.button{justify-self:end}
.feature-shell{width:100%;border-bottom:2px solid var(--line)}
.feature-shell>.feature{border-bottom:0}
@media(min-width:701px) and (max-width:1000px){.nav{padding-inline:32px}.nav>.button.compact{display:inline-flex;font-size:11px;padding-inline:12px}}
@media(max-width:700px){.nav{padding-inline:20px;display:flex;justify-content:space-between}.nav>.button{display:none}}

/* Footer aligns with the full-width header. */
.site-footer{width:100%;max-width:none;margin-inline:0;padding-inline:72px;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}
.site-footer>.logo{justify-self:start}.site-footer>p{justify-self:center;text-align:center}.site-footer>span{justify-self:end}
@media(min-width:701px) and (max-width:1000px){.site-footer{padding-inline:32px}}
@media(max-width:700px){.site-footer{padding-inline:20px;grid-template-columns:1fr auto}.site-footer>p{grid-column:1/-1;grid-row:2;justify-self:start;text-align:left}.site-footer>span{grid-column:2;grid-row:1}}

.legal-links{grid-column:1/-1;justify-content:center;flex-wrap:wrap;font-size:14px;gap:24px}.legal-links a,.legal-page a,#signup-status a{text-decoration:underline;text-underline-offset:3px}.legal-page{max-width:850px;padding-block:64px}.legal-page h1{font-size:44px}.legal-page h2{font-size:27px;margin:34px 0 14px}.legal-page p{margin:14px 0}.legal-date{font-size:14px;color:var(--muted)}.legal-notice{background:#fff3d9;padding:18px 22px;border-radius:12px;font-size:16px}.legal-page dl{font-size:16px}.legal-page dt{font-weight:900;margin-top:14px}.legal-page dd{margin:4px 0;color:var(--muted)}@media(max-width:700px){.legal-page{padding-block:40px}.legal-page h1{font-size:34px}.legal-links{grid-row:3;justify-content:flex-start}}

/* Editorial pages share the Skesia palette and full-width frame. */
.blog-intro{display:grid;grid-template-columns:1fr 280px;gap:60px;align-items:center;padding-block:64px 40px}.blog-intro h1{font-size:clamp(2.3rem,4vw,3.5rem)}.blog-intro p:not(.eyebrow){max-width:640px;color:var(--muted)}.blog-intro>img{width:100%;height:280px;object-fit:contain}.topic-nav{display:flex;flex-wrap:wrap;gap:12px;padding-bottom:35px;border-bottom:2px solid var(--line)}.topic-nav a{padding:9px 17px;border:2px solid var(--line);border-radius:25px;color:var(--ink)}.topic-nav a:hover{border-color:var(--purple);color:var(--purple)}.blog-collection{display:grid;grid-template-columns:1fr 1fr;gap:42px 35px;padding-block:44px 65px}.topic-section>h2{font-size:1.5rem;margin-bottom:20px}.blog-card{border:2px solid var(--line);border-radius:20px;overflow:hidden;height:100%;background:white;display:flex;flex-direction:column}.blog-card-art{background:#fff;display:flex;justify-content:center;padding:20px;height:190px}.blog-card-art img{width:150px;height:150px;object-fit:contain}.blog-card-copy{padding:26px;display:flex;flex:1;flex-direction:column;align-items:flex-start}.blog-card h3{font-size:1.55rem;line-height:1.25}.blog-card h3 a:hover{text-decoration:underline;text-underline-offset:4px}.blog-card-copy>p:not(.eyebrow){font-size:1rem;color:var(--muted)}.blog-card .eyebrow{font-size:.8rem;margin-bottom:12px}.read-link{color:var(--purple);font-size:1rem;font-weight:900;text-decoration:underline;text-underline-offset:5px}.blog-card .read-link{margin-top:auto}.editorial-note{padding-block:35px 60px;border-top:2px solid var(--line)}.editorial-note h2{font-size:1.6rem}.editorial-note p{font-size:1rem;max-width:850px}.editorial-note a,.article-body a{color:var(--purple);text-decoration:underline;text-underline-offset:3px}.breadcrumbs{flex-wrap:wrap;gap:10px;font-size:.875rem;padding-block:26px;color:var(--muted)}.breadcrumbs a{text-decoration:underline}.article-heading{max-width:850px;padding-block:25px 35px}.article-heading h1{font-size:clamp(2.1rem,4vw,3.2rem);line-height:1.12}.article-meta{font-size:.875rem;color:var(--muted);margin-block:22px}.article-lead{font-size:1.2rem;line-height:1.7}.article-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:60px}.article-toc nav{position:sticky;top:120px;display:flex;flex-direction:column;gap:14px;border-left:3px solid var(--line);padding-left:20px;font-size:.9rem}.article-toc a{font-weight:600}.article-body{max-width:720px;min-width:0;font-weight:500}.article-body section{margin-bottom:40px}.article-body h2{font-size:1.8rem;line-height:1.25;margin-bottom:20px}.article-body p{margin-block:18px}.article-body li{margin-bottom:12px}.article-takeaway{padding:26px;background:#f6f3fc;border-radius:16px;margin-bottom:36px}.article-takeaway h2{font-size:1.4rem}.article-takeaway p{margin-bottom:0}.article-sources{border-top:2px solid var(--line);padding-top:30px;font-size:1rem;overflow-wrap:anywhere}.article-sources p{color:var(--muted);font-size:.875rem}.article-cta{border-top:2px solid var(--line);padding-block:30px}.article-cta .button{color:white;text-decoration:none}.related{padding-block:50px 75px;border-top:2px solid var(--line);margin-top:30px}.related>h2{font-size:1.8rem;margin-bottom:28px}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.home-blog{padding-block:70px}.home-blog-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:32px}.home-blog h2{font-size:2.25rem}.topic-section{display:flex;flex-direction:column}.nav nav{gap:22px}.article-wrap,.editorial-note{overflow-wrap:break-word}
@media(max-width:1100px) and (min-width:701px){.nav{padding-inline:32px;gap:15px}.nav nav{gap:16px}.nav>.button.compact{font-size:10px;padding-inline:10px}}
@media(max-width:800px){.article-layout{grid-template-columns:1fr;gap:30px}.article-toc nav{position:static}.blog-intro{grid-template-columns:1fr 190px;gap:25px}.blog-intro>img{height:190px}}
@media(max-width:700px){.blog-intro{padding-block:40px 20px;grid-template-columns:1fr}.blog-intro>img{display:none}.topic-nav{gap:8px;font-size:.875rem}.blog-collection,.related-grid{grid-template-columns:1fr}.blog-card-art{height:155px}.blog-card-art img{height:120px;width:120px}.article-heading{padding-top:10px}.article-lead{font-size:1.1rem}.article-body h2{font-size:1.6rem}.home-blog-heading{display:block}.home-blog-heading>.read-link{display:inline-block;margin-top:22px}.home-blog h2{font-size:2rem}.nav nav{gap:12px;font-size:.875rem}.nav .logo img{width:92px}.blog-card-copy{padding:22px}}

/* Topic collections and illustrated, dated cards. */
.blog-collection{display:block;padding-top:38px}.topic-section{display:block;margin-bottom:56px}.topic-section>h2{font-size:1.8rem;margin-bottom:24px}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.blog-card{height:auto}.blog-card-art{height:auto;aspect-ratio:3/2;padding:0;background:#f8f5fc;overflow:hidden}.blog-card-art img{display:block;width:100%;height:100%;object-fit:cover}.blog-card-copy{padding:23px}.blog-card h3{font-size:1.4rem}.blog-card .eyebrow{margin-bottom:6px}.blog-card-copy>.card-date{font-size:.875rem;color:var(--muted);margin:0 0 16px;font-weight:600}.blog-count{font-size:.9rem!important;color:var(--purple)!important}.topic-nav{font-size:.9rem;gap:10px}.topic-nav a{padding:8px 13px}.article-exercises{margin-block:36px}.exercise{padding:24px;margin-top:18px;border:2px solid var(--line);border-radius:15px}.exercise h3{font-size:1.15rem}.exercise details{padding:15px 0 0;border-top:1px solid var(--line);border-bottom:0}.exercise details p{color:var(--ink);font-size:1rem;margin:16px 0 0}.exercise summary{font-size:1rem;color:var(--purple)}
@media(max-width:1000px){.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.topic-grid{grid-template-columns:1fr}.blog-card-art{height:auto}.blog-card-art img{width:100%;height:100%}.exercise{padding:18px}.blog-card h3{font-size:1.5rem}}
@media(min-width:701px){.topic-grid>.blog-card:only-child{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}.topic-grid>.blog-card:only-child .blog-card-art{height:100%;min-height:230px;aspect-ratio:auto}.topic-grid>.blog-card:only-child .blog-card-copy{padding:30px}.topic-grid>.blog-card:only-child h3{font-size:1.65rem}}

/* Fyx must remain fully visible: no cover crop may hide levitation or tail. */
.blog-card-art img{object-fit:contain}.blog-card-art{background:#f1eafa}
@media(min-width:701px){.topic-grid>.blog-card:only-child .blog-card-art{height:auto;min-height:0;aspect-ratio:3/2;align-self:center}}
.learning-icon{width:210px;height:140px;max-width:100%;object-fit:contain}

/* Accessible comparison tables remain scrollable within the article on mobile. */
.article-body,.article-layout{min-width:0}
.comparison-scroll{max-width:100%;overflow-x:auto;margin:1.5rem 0;border:1px solid #e2d9ef;border-radius:12px}
.comparison-scroll:focus-visible{outline:3px solid #7543bf;outline-offset:3px}
.comparison-scroll table{width:100%;min-width:540px;border-collapse:collapse;font-size:1rem;line-height:1.6}
.comparison-scroll caption{text-align:left;font-weight:800;padding:1rem;background:#f5effb;color:#282f4d}
.comparison-scroll th,.comparison-scroll td{padding:1rem;text-align:left;vertical-align:top;border-bottom:1px solid #e2d9ef}
.comparison-scroll thead{background:#ede3fa}
.comparison-scroll tbody tr:nth-child(even){background:#faf7fd}

@media(min-width:801px){.blog-intro>img{transform:translateX(-32px) scale(1.15)}}

.topic-nav-shell{border-bottom:2px solid var(--line)}
.topic-nav-shell .topic-nav{border-bottom:0}

/* Public pre-launch waitlist */
a.store-button{cursor:pointer;transition:transform .15s,border-color .15s}a.store-button:hover{border-color:var(--purple);transform:translateY(-2px)}.waitlist{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;padding-block:72px 88px}.waitlist h1{font-size:46px}.waitlist-copy>p:not(.eyebrow),.waitlist-form>p:not(.eyebrow){color:var(--muted)}.waitlist-fyx{display:block;width:min(100%,320px);height:auto;margin:30px auto 0}.waitlist-form{padding:32px;border:2px solid var(--line);border-radius:24px;background:#fff}.waitlist-form h2{font-size:32px}.waitlist-form form{display:grid;gap:14px}.waitlist-form label{font-size:15px;font-weight:800}.waitlist-form input[type=email]{width:100%;min-height:52px;padding:12px 16px;border:2px solid var(--line);border-radius:12px;color:var(--ink);font:inherit}.waitlist-form input:focus{outline:3px solid #7445bb44;border-color:var(--purple)}.waitlist-form .consent{display:flex;align-items:flex-start;gap:10px;font-size:13px;font-weight:600;line-height:1.5}.waitlist-form .consent input{margin-top:4px;accent-color:var(--purple)}.waitlist-form #signup-status,.waitlist-note{font-size:13px;line-height:1.6}.waitlist-form #signup-status a{color:var(--purple);text-decoration:underline}.waitlist-form .button{width:100%;cursor:pointer}.waitlist-form .button:disabled{opacity:.6;cursor:wait}@media(max-width:760px){.waitlist{grid-template-columns:1fr;gap:28px;padding-block:40px 56px}.waitlist h1{font-size:36px}.waitlist-fyx{max-width:220px;margin-top:22px}.waitlist-form{padding:24px}.waitlist-form h2{font-size:28px}}

/* Clear pre-launch conversion actions, shared by home and editorial pages. */
.launch-note,.signup-privacy{font-size:14px;line-height:1.6;color:var(--muted)}
.launch-action{margin:24px 0}.launch-action .launch-note{margin:0 0 20px}
.signup-privacy{margin:0}.signup-privacy a,.faq details a{color:var(--purple);text-decoration:underline;text-underline-offset:3px}
.blog-signup{padding-block:45px 55px;border-top:2px solid var(--line);text-align:center}.blog-signup h2{font-size:32px}
.article-cta .button{max-width:100%;text-align:center}.article-cta .launch-note{margin-bottom:0}
button:focus-visible,input:focus-visible{outline:3px solid var(--purple);outline-offset:4px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media(max-width:700px){.launch-action .button{font-size:12px;padding-inline:14px}.blog-signup h2{font-size:28px}}

.video-embed{margin-block:24px;padding:24px;border:2px solid var(--line);border-radius:16px;text-align:center;background:#faf8fd}.video-embed iframe{display:block;width:100%;height:auto;aspect-ratio:16/9;border:0}.video-embed:has(iframe){padding:0;overflow:hidden}.video-embed .button{white-space:normal;max-width:100%;cursor:pointer}.video-embed p{font-size:16px}

/* Searchable maths resources and keyboard-accessible practice. */
.resource-wrap{padding-block:32px 64px}.resource-hero{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center;margin:30px 0 40px}.resource-hero h1{font-size:42px}.resource-hero img{width:100%;height:auto;border-radius:24px}.resource-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-block:24px}.resource-card{display:flex;flex-direction:column;padding:16px;border:2px solid var(--line);border-radius:16px;color:var(--ink);background:white;font-size:16px}.resource-card:hover{border-color:var(--purple)}.resource-card span{font-size:13px;color:var(--muted);margin-top:6px}.resource-content{max-width:800px;margin:auto}.resource-content>section{margin-block:48px}.resource-content h2{font-size:30px}.practice-question{padding:24px;margin-block:22px;border:2px solid var(--line);border-radius:18px}.practice-question h3{font-size:22px}.answer-form label{display:block;font-weight:800;font-size:15px}.answer-row{display:flex;gap:12px;margin-top:10px}.answer-row input{width:100%;min-width:0;min-height:48px;border:2px solid var(--line);border-radius:12px;padding:10px;font:inherit}.answer-feedback{font-size:16px}.answer-feedback:empty{display:none}.practice-question.solved{border-color:var(--purple)}.practice-progress{font-weight:900;color:var(--purple)}.resource-more{margin-top:60px}[hidden]{display:none!important}
@media(max-width:800px){.resource-hero{grid-template-columns:1fr}.resource-hero img{max-width:350px;margin:auto}.resource-hero h1{font-size:34px}.resource-links{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-question{padding:18px}.answer-row{flex-wrap:wrap}.answer-row .button{width:100%}}

.measurement-choice{position:fixed;bottom:16px;left:16px;z-index:30;width:min(460px,calc(100% - 32px));max-height:80vh;overflow:auto;background:#fff;border:2px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 6px 28px #25304c22;font-size:14px;line-height:1.5}.measurement-choice p{margin:10px 0}.measurement-choice>div{display:flex;gap:12px;margin:16px 0}.measurement-choice button{flex:1;padding:12px;border:2px solid var(--purple);border-radius:10px;background:white;color:var(--purple);font:800 14px Nunito,sans-serif;cursor:pointer}.measurement-choice a{color:var(--purple);text-decoration:underline}.measurement-settings{border:0;background:none;text-decoration:underline;color:var(--muted);font:inherit;font-size:12px;cursor:pointer}

/* Resource navigation: compact choices before practice, grouped hub domains. */
.home-resources {padding-top:64px;padding-bottom:64px}
.topic-picker {display:flex;flex-wrap:wrap;gap:12px;margin:20px 0 32px}
.topic-picker a {display:inline-block;border:2px solid #e5e5eb;border-radius:24px;padding:9px 16px;color:#252f4c;text-decoration:none;font-weight:700}
.topic-picker a:hover,.topic-picker a:focus-visible {border-color:#7744bd;color:#7744bd}
.hub-domains {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.hub-domains section {padding:24px;border:2px solid #e5e5eb;border-radius:24px;margin:0}
.hub-domains li {margin:12px 0}
.resource-hero {display:block;max-width:900px}
.practice-question,.practice-set {scroll-margin-top:140px}
.next-question {display:inline-block;margin-top:20px}
.practice-invitation {margin:32px 0}
[hidden] {display:none!important}
@media(max-width:700px){.hub-domains{grid-template-columns:1fr}.home-resources{padding-top:40px;padding-bottom:40px}.topic-picker{gap:8px}.topic-picker a{font-size:15px}}
@media(min-width:901px) and (max-width:1250px){.nav nav{gap:12px}.nav nav a{font-size:14px}.nav .compact{font-size:12px;padding:14px}}
@media(max-width:900px){.nav{height:auto;min-height:92px;display:flex;flex-wrap:wrap;justify-content:center;padding-block:8px;gap:4px 16px}.nav nav{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 14px}.nav nav a:nth-child(2){display:inline}.nav nav a{font-size:13px}.nav .logo img{width:85px;height:48px}}
@media(max-width:520px){.nav nav{width:100%}.resource-hero h1{font-size:32px}.topic-heading{font-size:24px}.resource-content h2{font-size:26px}.answer-row{flex-wrap:wrap}.answer-row .button{width:100%}}

.footer-socials{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px;padding:20px 0;border-top:1px solid var(--line)}
.footer-socials>span{font-weight:700;color:var(--muted);font-size:15px}.footer-socials>div{display:flex;flex-wrap:wrap;gap:12px}.footer-socials a{display:inline-flex;align-items:center;gap:9px;min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--ink);font-weight:700;font-size:15px}.footer-socials a:hover,.footer-socials a:focus-visible{border-color:var(--purple);background:#f6f3fc}.footer-socials img{width:24px;height:24px;display:block}
@media(max-width:700px){.footer-socials{justify-content:flex-start}}

.press-section{padding-block:64px}.press-section h2{margin-bottom:18px}.press-intro{max-width:720px;color:var(--muted);margin-bottom:30px}.press-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.press-card{border:2px solid var(--line);border-radius:24px;padding:28px;display:flex;flex-direction:column;background:#fff}.press-card .eyebrow{font-size:13px;margin:0 0 8px}.press-card time{font-size:14px;color:var(--muted)}.press-card h3{font-size:25px;line-height:1.25;margin:20px 0 14px}.press-card>p:not(.eyebrow){font-size:17px;color:var(--muted);margin:0 0 24px}.press-card .read-link{margin-top:auto;font-size:16px}.press-reel{display:flex;align-items:center;gap:24px;background:#f6f3fc;border-radius:24px;padding:28px;margin-top:24px}.press-reel h3{font-size:25px;margin:6px 0}.press-reel p{font-size:17px;margin:0}.press-reel .eyebrow{font-size:13px}.press-reel>div{flex:1}.reel-play{display:grid;place-items:center;flex-shrink:0;width:58px;height:58px;border-radius:50%;background:var(--purple);color:#fff}.press-reel .button{font-size:14px;white-space:nowrap}
@media(max-width:900px){.press-grid{grid-template-columns:1fr}.press-reel{flex-wrap:wrap}.press-reel .button{margin-left:82px}}
@media(max-width:520px){.press-section{padding-block:40px}.press-card,.press-reel{padding:22px}.press-reel{gap:16px}.press-reel>div{flex-basis:100%}.press-reel .button{margin-left:0;white-space:normal}}
.home-blog-controls{display:flex;justify-content:flex-end;gap:10px;margin:-8px 0 18px}.home-blog-controls button{width:46px;height:46px;border:2px solid var(--line);border-radius:50%;background:#fff;color:var(--purple);font-size:24px;cursor:pointer}.home-blog-controls button:disabled{opacity:.35;cursor:default}.home-blog-controls button:focus-visible,.home-article-track:focus-visible{outline:3px solid var(--purple);outline-offset:4px}.home-article-track{display:grid;grid-auto-flow:column;grid-auto-columns:calc((100% - 28px)/2);gap:28px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:0;padding-bottom:18px;overscroll-behavior-x:contain;scrollbar-color:var(--purple) #eee9f6;scrollbar-width:thin}.home-article-track>.blog-card{min-width:0;scroll-snap-align:start}.home-article-track .blog-card-copy{display:flex;flex-direction:column;flex:1}.home-article-track .blog-card-copy>.read-link{margin-top:auto}
@media(max-width:700px){.home-article-track{grid-auto-columns:88%;gap:16px}.home-blog-controls{margin-top:18px}}

/* Keep CTA labels readable during taps and long presses on mobile Safari. */
.button{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}
@media(hover:none) and (pointer:coarse){
  .button{transition:background-color .15s,border-color .15s}
  .button:hover{background:var(--purple)}
  .button.secondary:hover{background:#fff}
  .button:active{transform:none;background:#683ba9;box-shadow:0 4px 0 #502a8b}
  .button.secondary:active{background:#f9f6fd;box-shadow:0 4px 0 var(--line)}
}

/* Portrait play area for the embedded Flappy Fyx mini-game. */
.flappy-game{width:100%;max-width:480px;margin:24px auto;overflow:hidden;border:2px solid var(--line);border-radius:20px;background:#87ceeb}.flappy-game iframe{display:block;width:100%;height:auto;aspect-ratio:2/3;border:0}

.article-body .flappy-game-action{width:100%;max-width:480px;margin:24px auto}.article-body .flappy-game-action .button{display:flex;width:100%;justify-content:center;color:#fff;text-decoration:none;white-space:normal}

.kit-sessions{display:grid;gap:24px;margin:24px 0}.kit-sessions section{border:2px solid var(--line);border-radius:20px;padding:28px}.kit-sessions a{color:var(--purple);text-decoration:underline}.kit-sessions summary{cursor:pointer;font-weight:800}@media print{header,footer,.measurement-choice,.article-cta,.skip{display:none!important}.kit-sessions section{break-inside:avoid}.kit-sessions{display:block}.kit-sessions section{margin-bottom:16px}body{font-size:12pt}}

.footer-about{display:flex;flex-direction:column;gap:12px;text-align:left}.footer-about h2{font-size:1.1rem;margin:0 0 6px}.footer-about a{color:var(--muted);font-weight:700}.footer-about a:hover{color:var(--purple)}.about-page{padding-bottom:64px}.about-hero{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:center;padding:64px 0}.about-hero h1{font-size:clamp(2.2rem,4vw,3.5rem);line-height:1.15}.about-hero img{width:100%;height:auto}.about-story{max-width:820px;padding:48px 0}.about-story p{line-height:1.8}.about-links{display:grid;gap:18px;margin-top:28px}.about-values{padding:48px 0;border-block:2px solid var(--line)}.about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}.about-grid article{border:2px solid var(--line);border-radius:24px;padding:28px}.about-grid h3{font-size:1.4rem}.about-contact{border-top:2px solid var(--line);padding-top:36px}@media(max-width:760px){.about-hero,.about-grid{grid-template-columns:1fr}.about-hero{padding:40px 0;gap:20px}.about-hero img{max-width:320px;justify-self:center}.about-story{padding:32px 0}}

/* Grouped site navigation */
.site-footer{display:block;background:#f6f3fc;border-top:2px solid #ece6f5;padding:56px max(24px,calc((100% - 1200px)/2)) 24px}
.footer-brand{display:flex;align-items:center;gap:28px;margin-bottom:40px}.footer-brand p{font-size:15px;color:var(--ink);margin:0}
.footer-columns{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:32px}.footer-columns nav{display:flex;flex-direction:column;align-items:flex-start;gap:14px;text-align:left}.footer-columns h2{font-size:20px;color:var(--ink);margin:0 0 10px}.footer-columns a{font-size:15px;color:#596176;font-weight:700}.footer-columns a:hover{color:var(--purple);text-decoration:underline}.footer-social-link{display:flex;align-items:center;gap:10px}.footer-bottom{border-top:1px solid #dcd3eb;margin-top:40px;padding-top:24px;font-size:13px;color:var(--muted)}
@media(max-width:1000px){.footer-columns{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:32px}}
@media(max-width:700px){.nav>.button{display:inline-flex;font-size:10px;letter-spacing:.3px;padding:9px 12px;max-width:210px;text-align:center}.footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 20px}.footer-brand{align-items:flex-start;flex-direction:column;gap:12px}.footer-brand p{order:initial}.site-footer{padding:36px 20px 24px}}

header .nav{display:flex;justify-content:space-between}header .nav>.button{margin-left:auto}

@media(max-width:700px){.waitlist{padding-top:24px;gap:20px}.waitlist-copy .eyebrow{margin-bottom:12px}.waitlist-copy h1{font-size:32px}.waitlist-copy>p:not(.eyebrow){margin:14px 0 0}.waitlist-copy .waitlist-fyx{display:none}.waitlist-form{padding:22px}.waitlist-form .eyebrow{margin-bottom:8px}.waitlist-form h2{font-size:26px}.waitlist-form>p{margin:12px 0}.waitlist #signup-email{scroll-margin-top:115px}}