@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@400;500;600;700&display=swap');
:root{--blue:#0066ff;--dark:#111;--paper:#f4f0e8;--line:#c9c6c0}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--dark);font-family:Inter,Arial,sans-serif}a{color:inherit}header,footer{padding:22px clamp(20px,5vw,74px);display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--dark);font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:600}header a,footer a{text-decoration:none}.wordmark{font-weight:700;letter-spacing:.08em}.wordmark small{font-size:10px;color:#666}main{max-width:1200px;margin:auto;padding:0 clamp(20px,5vw,74px) 100px}.hero{padding:75px 0 48px}.eyebrow,.strap{font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:600;letter-spacing:.13em;text-transform:uppercase}.eyebrow{color:var(--blue)}h1,h2{font-family:'Barlow Condensed','Arial Narrow',Impact,sans-serif;text-transform:uppercase;line-height:.88;letter-spacing:-.02em}h1{font-size:clamp(64px,11vw,148px);max-width:950px;margin:26px 0}h1 em{font-style:normal;color:var(--blue)}h2{font-size:clamp(36px,6vw,70px);margin:18px 0}.intro{max-width:740px;font-size:clamp(17px,2vw,23px);line-height:1.55}.rule{width:90px;height:5px;background:var(--blue);margin:36px 0 20px}.strap{margin:0}.panel{border-top:2px solid var(--dark);padding:35px 0 45px;max-width:960px}.panel>p{line-height:1.7;max-width:720px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.cta,.secondary{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:14px 22px;font:700 13px 'IBM Plex Mono',monospace;text-decoration:none;cursor:pointer;letter-spacing:.02em}.cta{background:var(--blue);color:white;border:2px solid var(--blue)}.secondary{background:transparent;border:2px solid var(--dark);color:var(--dark)}.cta:hover{background:#003399}.secondary:hover{background:#111;color:#fff}.hint{font-size:12px;color:#595959}.prompt textarea{width:100%;height:310px;resize:vertical;padding:20px;border:2px solid #111;background:#fff;color:#111;font:13px/1.6 'IBM Plex Mono',monospace}.back{font:700 13px 'IBM Plex Mono',monospace;text-decoration:none;color:var(--blue)}.catalog{padding:30px 0 65px}.activity-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:2px solid #111;margin-top:20px}.activity{display:flex;gap:18px;align-items:flex-start;padding:23px 12px 25px 0;border-bottom:1px solid #999;text-decoration:none}.activity:nth-child(odd){margin-right:20px}.num{font:900 56px/.85 'Barlow Condensed',Impact,sans-serif;color:var(--blue)}.info{display:flex;flex-direction:column;gap:9px;flex:1}.info strong{font:800 26px/1 'Barlow Condensed',Impact,sans-serif}.info span{font-size:12px;line-height:1.5;color:#555}.arr{font-size:25px;color:var(--blue)}.activity:hover .info strong{text-decoration:underline}footer{border-top:1px solid #111;border-bottom:0}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:#fff;padding:10px;z-index:5}@media(max-width:700px){header,footer{padding:16px 20px;font-size:10px}.wordmark small{display:none}.hero{padding:55px 0 40px}.activity-grid{grid-template-columns:1fr}.activity:nth-child(odd){margin-right:0}.activity{padding:20px 0}.num{font-size:46px}.info strong{font-size:24px}.actions>*{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Book promotion: index hero only; activity pages remain unchanged. */
.hero-with-book{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(250px,.75fr);gap:clamp(24px,4vw,60px);align-items:start}
.hero-with-book .hero-copy{min-width:0}
.hero-with-book h1{font-size:clamp(64px,8vw,118px);overflow-wrap:normal}
.book-promo{border:1px solid var(--line);background:#fff;padding:20px;margin-top:18px;min-width:0}
.book-promo-cover{display:block;max-width:190px;margin:0 auto 20px;background:var(--paper);text-decoration:none;min-height:235px}
.book-promo-cover img{display:block;width:100%;height:auto;aspect-ratio:2/3;object-fit:contain}
.book-promo-fallback{display:none;font:800 28px/1 'Barlow Condensed',Impact,sans-serif;padding:40px 12px;color:var(--dark)}
.book-promo-fallback b{color:var(--blue);font-size:45px}
.book-promo-cover.cover-unavailable .book-promo-fallback{display:block}
.book-promo-details h2{font-size:clamp(35px,3.5vw,52px);margin:12px 0}
.book-promo-details p:not(.eyebrow){font-size:13px;line-height:1.65;margin:0 0 18px}
.book-promo-details .eyebrow{font-size:10px;line-height:1.5}
.book-promo-details .cta{width:100%;font-size:11px;text-align:center}
@media(max-width:850px){.hero-with-book{grid-template-columns:1fr}.hero-with-book h1{font-size:clamp(64px,11vw,118px)}.book-promo{display:grid;grid-template-columns:minmax(100px,180px) minmax(0,1fr);gap:20px;align-items:center;margin-top:0}.book-promo-cover{margin:0;min-height:0}}
@media(max-width:480px){.book-promo{grid-template-columns:110px minmax(0,1fr);padding:12px;gap:12px}.book-promo-details h2{font-size:32px}.book-promo-details .cta{padding:12px 8px;font-size:10px}.book-promo-details p:not(.eyebrow){font-size:12px}}