:root{color-scheme:light;--ink:#18243c;--muted:#5b6579;--paper:#f5f7fc;--line:#dfe5ef;--display:'Space Grotesk',system-ui,sans-serif;--body:Inter,system-ui,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--body);-webkit-font-smoothing:antialiased;min-width:280px}
a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}
::selection{background:#d9e6fc;color:#18243c}
.ambient{position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 12% 8%,#e4edffb0,transparent 44%),radial-gradient(ellipse at 95% 38%,#eae3fda1,transparent 43%),linear-gradient(#fafbfe,#f2f5fb)}
.hub-header,main,.hub-footer{width:min(1160px,calc(100% - 88px));margin-inline:auto}
.hub-header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-block:30px}
.hub-brand{display:flex;align-items:center;gap:13px;min-height:48px;font-family:var(--display);font-size:14px;font-weight:600;letter-spacing:.02em}
.brand-caption{display:block;color:var(--muted);font-family:var(--body);font-size:11px;font-weight:400;letter-spacing:.025em;margin-top:3px}
.brand-glass{width:45px;height:45px;border-radius:15px;display:grid;place-items:center;font-size:34px;font-weight:400;color:#6564a7;background:linear-gradient(140deg,#fff,#e9eaff99);border:1px solid #fff;box-shadow:0 5px 15px #5d70971a,inset 1px 1px 0 #fff;backdrop-filter:blur(12px)}
.back-link{display:flex;gap:12px;align-items:center;min-height:46px;padding:0 19px;border:1px solid #d9e0eb;border-radius:100px;background:#ffffff80;font-size:13px;font-weight:500;transition:background .2s,border-color .2s}
.back-link:hover{background:#fff;border-color:#a8b6cc}
.back-link>span{font-size:20px}
.hub-intro{display:grid;grid-template-columns:1.2fr 1fr;column-gap:60px;align-items:end;padding:46px 0 40px}
.eyebrow{grid-column:1/-1;margin:0 0 18px;font-family:var(--body);font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:#647493}
h1{margin:0;font:500 clamp(46px,5.6vw,76px)/1.02 var(--display);letter-spacing:-.065em}
h1>span{color:#646e92}
.intro-copy{padding-bottom:5px}
.intro-copy p{font-size:16px;line-height:1.7;color:var(--muted);margin:0;letter-spacing:-.015em}
.intro-copy .intro-invitation{display:flex;align-items:center;gap:20px;font-size:12px;font-weight:500;margin-top:23px;color:#42526f}
.intro-invitation span{font-size:25px;line-height:1}
.learning-spaces{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:20px;scroll-margin-top:24px;outline:none}
.app-card{--accent:#1865f2;--rgb:24,101,242;grid-column:span 2;position:relative;display:flex;flex-direction:column;min-width:0;border-radius:28px;border:1px solid #fff;background:linear-gradient(148deg,#ffffffef,#ffffffa6);box-shadow:0 8px 32px -20px #33477355,0 0 0 1px #dce3ee66,inset 0 1px 0 #fff;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:box-shadow .3s,border-color .3s,transform .3s;isolation:isolate;animation:card-arrive .6s both}
.app-corpus{--accent:#8a4b2d;--rgb:138,75,45;animation-delay:.05s}
.app-quanta{--accent:#2456b8;--rgb:74,144,226}
.app-cosmos{--accent:#7950c2;--rgb:143,108,219;animation-delay:.1s}
.app-infinite{grid-column:span 3;animation-delay:.15s}
.app-youtube{--accent:#bd1738;--rgb:239,50,87;grid-column:span 3;animation-delay:.2s}
.logo-stage{position:relative;min-height:160px;display:grid;place-items:center;margin:8px 8px 0;border-radius:21px;background:linear-gradient(135deg,rgba(var(--rgb),.035),rgba(var(--rgb),.065));isolation:isolate}
.logo-halo{position:absolute;width:170px;height:100px;border-radius:50%;background:rgba(var(--rgb),.5);filter:blur(32px);opacity:0;transform:scale(.8);transition:opacity .35s,transform .4s;z-index:-1;pointer-events:none}
.logo-face{transition:transform .35s;position:relative;text-align:center}
.logo-infinite{font-family:'Hanken Grotesk',var(--body);font-weight:500;font-size:31px;line-height:1.1;letter-spacing:-.055em;color:#0b2149}
.logo-infinite span,.logo-infinite i{display:block}
.logo-infinite i{color:#1865f2;font-weight:500}
.logo-corpus{font-family:'Cormorant Garamond',Georgia,serif;color:#2a2119;font-size:34px;font-weight:500;line-height:.98;letter-spacing:-.035em}
.logo-corpus span{display:block}
.logo-corpus span:last-child{font-size:28px;color:#8a4b2d;margin-top:5px;letter-spacing:.025em}
.logo-quanta,.logo-cosmos,.logo-youtube{display:flex;align-items:center;gap:17px}
.quanta-tile,.cosmos-tile{display:grid;place-items:center;width:68px;height:68px;border-radius:21px;font:700 42px/1 var(--display);box-shadow:0 5px 12px rgba(var(--rgb),.22),inset 0 1px 0 #ffffff60}
.quanta-tile{background:linear-gradient(150deg,#4a90e2,#2456b8 62%,#123a7a);color:white;font-family:'Baloo 2',var(--display)}
.quanta-wordmark{font:400 22px/1 var(--display);letter-spacing:.13em;color:#2456b8}
.cosmos-tile{background:linear-gradient(135deg,#34f5b0,#5b8cff,#a779ff);color:#04050a}
.cosmos-wordmark{font:700 23px/1 var(--display);letter-spacing:.075em;color:#252d47}
.logo-youtube svg{width:72px;height:auto;display:block}
.youtube-wordmark{font:600 25px/1 var(--display);letter-spacing:-.065em;color:#242a37}
.app-content{padding:23px 26px 19px;display:flex;flex:1;flex-direction:column}
.app-category{margin:0 0 8px;font-size:10px;line-height:1.5;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
h2{font:600 22px/1.25 var(--display);letter-spacing:-.035em;margin:0 0 10px}
.app-content>p:not(.app-category){font-size:13px;line-height:1.7;color:var(--muted);margin:0 0 18px;max-width:43ch}
.app-action{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;font-weight:600;margin-top:auto;min-height:44px;color:#334464}
.launch-arrow{display:grid;place-items:center;width:40px;height:40px;font-size:21px;line-height:1;background:rgba(var(--rgb),.045);border:1px solid rgba(var(--rgb),.15);border-radius:50%;color:var(--accent);transition:background .3s,transform .3s}
.app-card:focus-visible{outline:3px solid var(--accent);outline-offset:5px;box-shadow:0 8px 38px -12px rgba(var(--rgb),.35);border-color:rgba(var(--rgb),.35)}
.app-card:focus-visible .logo-halo{opacity:.58;transform:scale(1.1)}
@media(hover:hover){.app-card:hover{transform:translateY(-4px);border-color:rgba(var(--rgb),.32);box-shadow:0 13px 38px -20px rgba(var(--rgb),.52),0 0 36px -15px rgba(var(--rgb),.35),inset 0 1px 0 #fff}.app-card:hover .logo-halo{opacity:.58;transform:scale(1.1)}.app-card:hover .logo-face{transform:translateY(-2px)}.app-card:hover .launch-arrow{background:rgba(var(--rgb),.12);transform:translate(1px,-1px)}}
.app-card:active{transform:translateY(-1px);border-color:var(--accent)}
.app-card:active .logo-halo{opacity:.58}
.external-note{display:flex;gap:8px;justify-content:center;align-items:baseline;margin:25px 0 0;font-size:11px;line-height:1.6;color:#657189;text-align:center}
.external-note span{font-size:15px}
.hub-footer{margin-top:42px;border-top:1px solid var(--line);padding:24px 0 30px;display:flex;justify-content:space-between;align-items:center;gap:18px;font-size:11px;color:#626d83}
.footer-infinity{font-family:var(--display);font-size:27px;color:#818baa}
.hub-footer a{min-height:44px;display:flex;gap:12px;align-items:center}
a:focus-visible{outline:3px solid #5373b6;outline-offset:5px;border-radius:8px}
.skip-link{position:fixed;top:8px;left:16px;padding:14px 20px;border-radius:10px;z-index:30;background:#18243c;color:#fff;transform:translateY(-160%)}
.skip-link:focus{transform:none}
@keyframes card-arrive{from{opacity:0;translate:0 10px}to{opacity:1;translate:0 0}}
@media(min-width:1500px){.hub-header,main,.hub-footer{width:min(1320px,calc(100% - 120px))}.hub-intro{padding:58px 0 48px}.logo-stage{min-height:180px}.app-content{padding:25px 30px 22px}.app-content>p:not(.app-category){font-size:14px}h2{font-size:25px}}
@media(max-width:1000px){.hub-header,main,.hub-footer{width:calc(100% - 48px)}.hub-intro{gap:22px;padding-top:28px}.learning-spaces{gap:16px}.app-content{padding:21px 20px 16px}.logo-quanta{gap:10px}.quanta-tile{width:56px;height:56px;font-size:35px}.quanta-wordmark{font-size:17px;letter-spacing:.11em}.logo-infinite{font-size:29px}.logo-corpus{font-size:31px}h2{font-size:20px}}
@media(max-width:760px){.hub-header,main,.hub-footer{width:calc(100% - 36px)}.hub-header{padding-block:20px;gap:12px}.brand-caption{font-size:10px}.hub-brand{font-size:12px;gap:9px}.brand-glass{width:39px;height:39px;font-size:30px;border-radius:13px}.back-link{font-size:11px;padding-inline:12px;gap:7px}.hub-intro{grid-template-columns:1fr;padding:30px 0 30px;row-gap:18px}.eyebrow{margin:0;font-size:10px}h1{font-size:54px}.intro-copy p{font-size:14px}.intro-copy .intro-invitation{margin-top:15px}.learning-spaces{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.app-card,.app-infinite,.app-youtube{grid-column:span 1}.app-youtube{grid-column:1/-1}.logo-stage{min-height:142px}.logo-quanta,.logo-cosmos{gap:10px}.cosmos-tile{width:56px;height:56px;font-size:35px}.cosmos-wordmark{font-size:18px}.hub-footer{margin-top:32px}}
@media(max-width:500px){.learning-spaces{grid-template-columns:minmax(0,1fr);gap:18px}.app-card{border-radius:25px}.logo-stage{min-height:155px}.app-content{padding:22px 24px 17px}h2{font-size:24px}.app-content>p:not(.app-category){font-size:14px}.app-action{font-size:13px}.logo-infinite{font-size:34px}.logo-corpus{font-size:35px}.logo-quanta,.logo-cosmos{gap:17px}.quanta-tile,.cosmos-tile{width:68px;height:68px;font-size:42px}.quanta-wordmark,.cosmos-wordmark{font-size:22px}.hub-footer{flex-wrap:wrap;gap:8px;font-size:10px}.footer-infinity{display:none}.external-note{font-size:11px;padding-inline:10px}.hub-brand{font-size:11px}.brand-caption{font-size:9px}.back-link{font-size:10px}h1{font-size:clamp(43px,12vw,56px)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.app-card:hover,.app-card:active,.app-card:hover .logo-face,.app-card:hover .launch-arrow{transform:none}}
@media(prefers-reduced-transparency:reduce),(prefers-contrast:more){.app-card,.back-link,.brand-glass{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}.app-card{border-color:#9aa8bc}.logo-halo{display:none}.app-content>p:not(.app-category),.intro-copy p{color:#3c485d}}
@media(forced-colors:active){.ambient,.logo-halo{display:none}.app-card,.brand-glass,.back-link,.launch-arrow{background:Canvas;color:CanvasText;border:1px solid CanvasText;box-shadow:none}.logo-stage{background:Canvas}.logo-face,.logo-face *,.app-category,.app-action{color:CanvasText}.app-card:focus-visible{outline-color:Highlight}}