/* Scoped hub styles preserve the shared navigation and existing activity pages. */
.learning-hub{margin:0;background:radial-gradient(ellipse at 80% 0,rgba(69,84,218,.3),transparent 42rem),#0c1438;color:#f8faff;font-family:Nunito,system-ui,sans-serif;line-height:1.5}
.learning-hub *{box-sizing:border-box}.learning-hub a{color:inherit}.learning-hub h1,.learning-hub h2,.learning-hub h3{font-family:Poppins,system-ui,sans-serif;color:inherit}
.hub-page{width:min(1280px,calc(100% - 48px));margin:auto;padding:24px 0 56px}.hub-breadcrumb{display:flex;flex-wrap:wrap;gap:12px;color:#bbc9ec;font-size:.82rem;margin-bottom:24px}.hub-breadcrumb a{text-decoration:none}
.hub-hero{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center;padding:clamp(26px,4vw,52px);border:1px solid #5665cb;border-radius:26px;background:radial-gradient(ellipse at 100% 100%,#184f81,transparent 70%),linear-gradient(120deg,#292477,#152659);overflow:hidden;box-shadow:0 22px 56px #03092355}
.hero-label,.section-label{font-size:.7rem;font-weight:900;letter-spacing:.14em;color:#ffdb66;margin:0 0 12px}.hub-hero h1{font-size:clamp(2.1rem,4.3vw,3.9rem);line-height:1.08;letter-spacing:-.045em;margin:0 0 20px;font-weight:900}.hub-hero h1 span{color:#7fe8ff}.hero-description{max-width:560px;font-size:1.02rem;line-height:1.7;color:#e1e8ff;margin:0 0 24px}.hero-button{display:inline-flex;gap:24px;align-items:center;text-decoration:none;background:#ffdb66;color:#142047!important;padding:12px 19px;border-radius:12px;font-weight:900}
.hero-mosaic{display:grid;grid-template-columns:1fr 1fr;gap:13px;max-width:325px;transform:rotate(-5deg);justify-self:center;width:100%}.hero-mosaic>span{aspect-ratio:1.15;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:22px;font-size:2.8rem;line-height:1.15;border:1px solid #ffffff66;box-shadow:0 12px 16px #03092333;color:#fff}.hero-mosaic small{font-size:.62rem;font-weight:900;letter-spacing:.2em;margin-top:10px}.mosaic-play{background:#434ed8}.mosaic-build{background:#b84c15;transform:translateY(14px)}.mosaic-solve{background:#087969}.mosaic-create{background:#8a36b5;transform:translateY(14px)}
.collection-nav{display:flex;gap:8px;flex-wrap:wrap;padding:20px 0 8px;margin-bottom:22px}.collection-nav a{text-decoration:none;padding:10px 14px;border:1px solid #52628d;border-radius:999px;font-size:.79rem;font-weight:800;background:#19264e}.collection-nav a:hover{border-color:#7fe8ff;background:#253b71}
.activity-section{margin-bottom:45px;scroll-margin-top:95px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:22px;margin-bottom:18px}.section-label{font-size:.62rem;margin:0 0 6px;color:#8ee4ff}.section-head h2{font-size:clamp(1.4rem,2.8vw,1.9rem);line-height:1.2;letter-spacing:-.03em;margin:0 0 7px}.section-head p:last-child{font-size:.9rem;color:#c1cdec;margin:0}.see-more{display:inline-flex;align-items:center;gap:16px;text-decoration:none;white-space:nowrap;background:#26386b;border:1px solid #6376b3;padding:10px 15px;border-radius:10px;font-size:.82rem;font-weight:800}.see-more:hover{background:#354b85}
.activity-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.activity-card{min-width:0;display:flex;flex-direction:column;text-decoration:none;border:1px solid #445788;border-radius:18px;background:#19264e;overflow:hidden;box-shadow:0 8px 24px #02072333;transition:transform .16s,border-color .16s}.activity-card:hover{transform:translateY(-4px);border-color:#8ce6ff}.activity-art{position:relative;isolation:isolate;height:158px;overflow:hidden;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 75% 15%,#ffffff2a,transparent 45%),linear-gradient(135deg,var(--art-top),var(--art-bottom))}.blue{--art-top:#3254d3;--art-bottom:#14336d}.purple{--art-top:#9c43d7;--art-bottom:#492198}.orange{--art-top:#dc681b;--art-bottom:#8b2e27}.teal{--art-top:#0d9983;--art-bottom:#075b70}.activity-art:before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(#ffffff13 1px,transparent 1px),linear-gradient(90deg,#ffffff13 1px,transparent 1px);background-size:25px 25px;transform:perspective(220px) rotateX(30deg) scale(1.3)}.activity-art img{width:100%;height:100%;object-fit:cover;display:block}.activity-symbol{font:800 4.3rem/1 system-ui,sans-serif;color:#fff;text-shadow:0 8px 20px #0004;transform:rotate(-8deg);padding-bottom:12px}.art-label{position:absolute;bottom:12px;left:15px;font-size:.61rem;letter-spacing:.12em;text-transform:uppercase;font-weight:900;color:#fff}.launch-mark{position:absolute;right:12px;bottom:12px;background:#f5f9ff;color:#17234b;width:29px;height:29px;display:grid;place-items:center;border-radius:50%;font-weight:900;box-shadow:0 2px 8px #0003}.activity-copy{padding:18px;flex:1;display:flex;flex-direction:column}.activity-tag{color:#a8e8ff;font-weight:800;font-size:.64rem;letter-spacing:.06em;text-transform:uppercase}.activity-copy h3{font-size:1.02rem;line-height:1.3;margin:8px 0 9px;letter-spacing:-.015em}.activity-copy p{font-size:.85rem;line-height:1.55;margin:0 0 18px;color:#d0daf2}.activity-cta{display:flex;justify-content:space-between;gap:12px;margin-top:auto;color:#ffdc77;font-weight:900;font-size:.76rem}
.more-activities{margin-top:18px}.more-activities summary{display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none;width:fit-content;gap:20px;padding:10px 15px;border-radius:10px;background:#26386b;border:1px solid #6376b3;font-weight:800;font-size:.82rem}.more-activities summary::-webkit-details-marker{display:none}.more-activities[open] summary{margin-bottom:18px}.more-activities[open] summary>span:last-child{transform:rotate(45deg)}
.hub-help{padding:24px 28px;border:1px solid #536498;border-radius:18px;background:#1c2b57;display:flex;align-items:center;justify-content:space-between;gap:30px}.hub-help h2{font-size:1.2rem;margin:0 0 6px}.hub-help p{max-width:740px;color:#d0daf2;font-size:.9rem;margin:0}.hub-help>a{white-space:nowrap;font-size:.84rem;font-weight:900;color:#ffdc77}.hub-footer{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:20px;padding:25px 24px;border-top:1px solid #3e4e7c;font-size:.78rem;color:#c1cdec}.hub-footer p{margin:0}.hub-fallback{padding:16px;display:flex;gap:24px}.learning-hub .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-100px;left:12px;z-index:10000;background:#ffdb66;padding:12px 20px;color:#142047!important;border-radius:8px}.skip-link:focus{top:8px}.learning-hub a:focus-visible,.learning-hub summary:focus-visible{outline:3px solid #ffdb66;outline-offset:4px}#activities{scroll-margin-top:90px}
@media(max-width:1050px){.activity-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.activity-art{height:185px}.hero-mosaic{max-width:250px}.hub-hero{gap:25px}.hub-help{align-items:flex-start;flex-direction:column;gap:18px}}
@media(max-width:640px){.hub-page{width:calc(100% - 28px);padding-top:18px}.hub-hero{grid-template-columns:1fr;padding:26px 22px;gap:26px}.hero-mosaic{display:none}.hub-hero h1{font-size:2.3rem}.hero-description{font-size:.94rem}.collection-nav{gap:7px}.collection-nav a{font-size:.72rem;padding:9px 11px}.section-head{align-items:flex-start;flex-direction:column;gap:12px}.section-head h2{font-size:1.55rem}.activity-grid{gap:12px}.activity-art{height:132px}.activity-copy{padding:14px}.activity-copy h3{font-size:.95rem}.activity-copy p{font-size:.8rem}.activity-symbol{font-size:3.5rem}.art-label{font-size:.5rem;left:10px}.activity-tag{font-size:.56rem}.launch-mark{width:24px;height:24px;right:9px;bottom:9px}.hub-help{padding:22px}.hub-footer{gap:14px}}
@media(max-width:390px){.activity-grid{grid-template-columns:1fr}.activity-art{height:160px}.activity-copy h3{font-size:1.05rem}.activity-copy p{font-size:.87rem}}
@media(prefers-reduced-motion:reduce){.activity-card{transition:none}.activity-card:hover{transform:none}}