.hub{--hub-accent: var(--po-violet);}.hub--season{--act-accent: var(--po-amber-strong,#C77700);}.hub--halloween .act-hero{background: radial-gradient(circle at 92% 18%,var(--po-amber-soft),transparent 42%),var(--po-paper-2);}.hub--christmas-and-winter .act-hero{background: radial-gradient(circle at 92% 18%,var(--po-sky-soft),transparent 42%),var(--po-paper-2);}.hub--teasers{--act-accent: var(--po-sky-deep);}.hub--science{--act-accent: var(--po-teal-strong,#0F7A5C);}.hub-jump ul{list-style: none;display: flex;flex-wrap: wrap;gap: 0.4rem;margin: var(--po-space-3) 0 0;padding: 0;}.hub-jump a{display: inline-flex;align-items: center;min-height: 40px;padding: 0 0.9rem;border-radius: var(--po-radius-pill);background: var(--po-white);border: 2px solid var(--po-line);color: var(--po-ink);font-weight: 700;text-decoration: none;}.hub-jump a:hover,.hub-jump a:focus-visible{border-color: var(--act-accent);}.hub-intro{padding-top: var(--po-space-4);max-width: 78ch;}.hub-intro p{margin: 0 0 var(--po-space-2);line-height: 1.6;}.hub-countdown{font-weight: 800;color: var(--act-accent);}.hub-shelf{padding-top: var(--po-space-5);}.hub-shelf__head{display: grid;gap: 0.25rem;margin-bottom: var(--po-space-3);}.hub-shelf__head .act-section-title{margin: 0;}.hub-shelf__head .act-section-title a{color: inherit;text-decoration: none;}.hub-shelf__head .act-section-title a:hover,.hub-shelf__head .act-section-title a:focus-visible{text-decoration: underline;}.hub-shelf__lede{margin: 0 0 var(--po-space-3);color: var(--po-ink-soft);max-width: 70ch;}.hub-more{margin: var(--po-space-3) 0 0;font-weight: 700;}.hub-more a{color: var(--po-sky-deep);}.hub-color-card .act-card__art{background: var(--po-white);}.hub-color-card .act-card__art img{padding: 6%;}.hub-color-card[hidden]{display: none;}.hub-chips{margin-bottom: var(--po-space-2);}.hub-pill-links{list-style: none;display: flex;flex-wrap: wrap;gap: 0.5rem;padding: 0;}.hub-pill-links a{display: inline-flex;min-height: 44px;align-items: center;padding: 0 1rem;border-radius: var(--po-radius-pill);background: var(--po-paper-2);color: var(--po-ink);font-weight: 700;}@media (max-width: 560px){.hub-grid{grid-template-columns: 1fr 1fr;gap: 0.6rem;}.hub-grid .act-card__body{padding: 0.55rem 0.6rem 0.65rem;}.hub-grid .act-card__title{font-size: 1rem;}.hub-grid .act-card__meta{font-size: 0.8rem;}}.hub-page__top{padding-top: var(--po-space-3);}.hub-page__hero{display: grid;gap: var(--po-space-4);align-items: start;}@media (min-width: 900px){.hub-page__hero{grid-template-columns: minmax(18rem,30rem) 1fr;gap: var(--po-space-6);}}.hub-page__picture{margin: 0;}.hub-page__canvas{background: var(--po-white);border: 1px solid var(--po-line);border-radius: var(--po-radius-lg);box-shadow: var(--po-shadow-2);overflow: hidden;aspect-ratio: 1;}.hub-page__canvas img,.hub-page__canvas svg{display: block;width: 100%;height: 100%;}.hub-page__canvas svg [data-hub-region]{cursor: pointer;}.hub-page__about{margin: 0 0 0.75rem;line-height: 1.6;max-width: 62ch;}.hub-page__note{margin: 0;color: var(--po-ink-soft);font-size: 0.95rem;}.hub-palette{margin-top: var(--po-space-2);display: grid;gap: 0.5rem;}.hub-palette[hidden]{display: none;}.hub-palette__hint{margin: 0;font-weight: 700;}.hub-palette__swatches{display: flex;flex-wrap: wrap;gap: 6px;}.hub-swatch{width: 40px;height: 40px;border-radius: 50%;border: 2px solid var(--po-line-strong);cursor: pointer;padding: 0;}.hub-swatch[aria-checked="true"]{outline: 3px solid var(--po-ink);outline-offset: 2px;}.hub-swatch:focus-visible{outline: 3px solid var(--po-focus);outline-offset: 2px;}.hub-palette__actions{display: flex;flex-wrap: wrap;gap: 0.5rem;}.hub-learn{padding-top: var(--po-space-5);}.hub-learn__card{display: grid;gap: var(--po-space-3);align-items: center;padding: var(--po-space-3);border-radius: var(--po-radius-lg);background: var(--po-lavender-soft);}.hub-learn__card img{width: 140px;height: 140px;background: var(--po-white);border-radius: var(--po-radius-lg);}.hub-learn__card p{margin: 0 0 0.75rem;max-width: 60ch;}@media (min-width: 640px){.hub-learn__card{grid-template-columns: 140px 1fr;}}.hub-part-of{padding-top: var(--po-space-3);font-weight: 700;}.hub-teasers{list-style: none;margin: 0;padding: 0;display: grid;gap: 0.75rem;grid-template-columns: repeat(auto-fill,minmax(min(100%,19rem),1fr));}.hub-teaser{display: flex;flex-direction: column;gap: 0.5rem;padding: 1rem;border-radius: var(--po-radius-lg);background: var(--po-white);border: 1px solid var(--po-line);}.hub-teaser__q{margin: 0;font-weight: 700;line-height: 1.45;}.hub-teaser__reveal summary{min-height: 44px;display: inline-flex;align-items: center;cursor: pointer;font-weight: 700;color: var(--po-sky-deep);}.hub-teaser__reveal p{margin: 0.25rem 0 0;font-weight: 800;}.hub-teaser__link{margin-top: auto;font-weight: 700;color: var(--po-sky-deep);min-height: 32px;display: inline-flex;align-items: center;}.hub-level{align-self: flex-start;padding: 0.1rem 0.6rem;border-radius: var(--po-radius-pill);font-size: 0.8rem;font-weight: 800;background: var(--po-paper-2);}.hub-level--easy{background: var(--po-mint-soft);}.hub-level--medium{background: var(--po-amber-soft);}.hub-level--hard{background: var(--po-berry-soft);}.hub-filter{padding-top: var(--po-space-3);display: flex;flex-wrap: wrap;align-items: center;gap: 0.5rem 0.75rem;}.hub-filter__label{margin: 0;font-weight: 800;}.hub-filter__list,.hub-pager ul{list-style: none;display: flex;flex-wrap: wrap;gap: 0.4rem;margin: 0;padding: 0;}.hub-filter__list a,.hub-pager a{display: inline-flex;align-items: center;gap: 0.35rem;min-height: 44px;min-width: 44px;justify-content: center;padding: 0 0.85rem;border-radius: var(--po-radius-pill);border: 2px solid var(--po-line-strong);background: var(--po-white);color: var(--po-ink);font-weight: 700;text-decoration: none;}.hub-filter__list a span{color: var(--po-ink-soft);font-weight: 600;font-size: 0.85rem;}.hub-filter__list a[aria-current="page"],.hub-pager a[aria-current="page"]{background: var(--po-ink);border-color: var(--po-ink);color: var(--po-white);}.hub-filter__list a[aria-current="page"] span{color: var(--po-white);}.hub-filter__list a:focus-visible,.hub-pager a:focus-visible{outline: 3px solid var(--po-focus);outline-offset: 2px;}.hub-pager{margin-top: var(--po-space-4);}.hub-group{margin-bottom: var(--po-space-5);}.hub-group__title{font-family: var(--po-font-display);font-size: 1.3rem;margin: 0 0 0.25rem;}.hub-group__about{margin: 0 0 var(--po-space-2);color: var(--po-ink-soft);}.hub-group__more{margin-top: var(--po-space-2);}.hub-group__more summary{min-height: 44px;display: inline-flex;align-items: center;cursor: pointer;font-weight: 700;color: var(--po-sky-deep);}.hub-group__more ul{columns: 2 18rem;margin: 0.5rem 0 0;padding-left: 1.2rem;}.hub-group__more li{margin-bottom: 0.35rem;break-inside: avoid;}.hub-group__more li span{color: var(--po-ink-soft);font-size: 0.9rem;}.hub-topics{list-style: none;margin: 0;padding: 0;display: grid;gap: 0.75rem;grid-template-columns: repeat(auto-fill,minmax(min(100%,20rem),1fr));}.hub-topics a{display: grid;grid-template-columns: 96px 1fr;gap: 0.75rem;align-items: center;padding: 0.75rem;border-radius: var(--po-radius-lg);background: var(--po-white);border: 1px solid var(--po-line);color: var(--po-ink);text-decoration: none;}.hub-topics a:hover,.hub-topics a:focus-visible{border-color: var(--act-accent);}.hub-topics img{width: 96px;height: 72px;object-fit: cover;border-radius: 10px;background: var(--po-paper-2);}.hub-topics a span{display: grid;gap: 0.2rem;}.hub-topics a span span{color: var(--po-ink-soft);font-size: 0.9rem;}.hub-links a{min-height: 64px;}.hub-seasons{padding-top: var(--po-space-4);}.hub-season-list{list-style: none;margin: 0;padding: 0;display: grid;gap: var(--po-space-3);grid-template-columns: repeat(auto-fill,minmax(min(100%,22rem),1fr));}.hub-season-card{position: relative;display: flex;flex-direction: column;border-radius: var(--po-radius-lg);background: var(--po-white);border: 1px solid var(--po-line);overflow: hidden;}.hub-season-card:focus-within{outline: 3px solid var(--po-focus);outline-offset: 2px;}.hub-season-card__art{display: grid;grid-template-columns: repeat(3,1fr);background: var(--po-paper-2);border-bottom: 1px solid var(--po-line);}.hub-season-card__art img{width: 100%;height: auto;aspect-ratio: 1;padding: 8%;}.hub-season-card__body{padding: 1rem;display: grid;gap: 0.35rem;}.hub-season-card__body p{margin: 0;}.hub-season-card__when{font-weight: 800;color: var(--act-accent);text-transform: uppercase;letter-spacing: 0.04em;font-size: 0.85rem;}.hub-season-card__count{color: var(--po-ink-soft);font-weight: 700;}.hub-safety{margin-top: var(--po-space-3);padding: var(--po-space-3);border-radius: var(--po-radius-lg);background: var(--po-amber-soft);border: 2px solid var(--po-amber);}.hub-safety h2{margin: 0 0 0.5rem;font-size: 1.15rem;}.hub-safety ul{margin: 0;padding-left: 1.2rem;}.hub-safety li{margin-bottom: 0.25rem;}.hub-experiments{list-style: none;margin: 0;padding: 0;display: grid;gap: 0.75rem;grid-template-columns: repeat(auto-fill,minmax(min(100%,26rem),1fr));}.hub-experiment{display: grid;grid-template-columns: 96px 1fr;gap: 0.85rem;align-items: start;padding: 1rem;border-radius: var(--po-radius-lg);background: var(--po-white);border: 1px solid var(--po-line);}.hub-experiment__poster{width: 96px;height: 72px;object-fit: cover;border-radius: 10px;background: var(--po-paper-2);}.hub-experiment__name{margin: 0;font-family: var(--po-font-display);font-size: 1.15rem;}.hub-experiment__band{margin: 0.15rem 0 0.4rem;font-size: 0.8rem;font-weight: 800;color: var(--act-accent);}.hub-experiment p{margin: 0 0 0.5rem;line-height: 1.55;}.hub-experiment__link{font-weight: 700;color: var(--po-sky-deep);}@media (max-width: 480px){.hub-experiment{grid-template-columns: 1fr;}.hub-experiment__poster{display: none;}}@media print{body.hub-printing > *:not(main),body.hub-printing main > *:not(.hub-page),body.hub-printing .hub-page > *:not(.hub-page__top),body.hub-printing .hub-page__intro,body.hub-printing .hub-palette,body.hub-printing .act-crumbs{display: none !important;}body.hub-printing .hub-page__hero{display: block;}body.hub-printing .hub-page__canvas{border: 0;box-shadow: none;max-width: 180mm;margin: 0 auto;}}