:root{
  --ink:#18233f;
  --muted:#5a6682;
  --paper:#fffdf8;
  --white:#ffffff;
  --blue:#246bfd;
  --cyan:#23c9e8;
  --yellow:#ffd84d;
  --pink:#ff4f9a;
  --purple:#8157e6;
  --green:#44c77a;
  --orange:#ff8b3d;
  --navy:#152046;
  --line:#dfe5f2;
  --shadow:0 14px 36px rgba(38,56,104,.12);
  --radius:26px;
  --max:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Trebuchet MS,Arial,sans-serif;line-height:1.58}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,a{touch-action:manipulation}
:focus-visible{outline:4px solid #101b3d;outline-offset:4px;border-radius:8px}
.skip-link{position:absolute;left:-999px;top:10px;background:#111;color:#fff;padding:10px 14px;z-index:99}
.skip-link:focus{left:10px}
.container{width:min(var(--max),calc(100% - 32px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,253,248,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(24,35,63,.08)}
.nav{min-height:74px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.3rem;letter-spacing:-.03em;white-space:nowrap}
.brand-mark{width:40px;height:40px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;box-shadow:0 7px 0 rgba(129,87,230,.18);transform:rotate(-4deg)}
.brand-mark span{transform:rotate(4deg)}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:8px;list-style:none;padding:0}
.nav-links a{font-weight:800;padding:10px 12px;border-radius:14px}
.nav-links a:hover{background:#eef3ff}
.nav-cta{background:var(--blue)!important;color:#fff!important;box-shadow:0 6px 0 #174fc7}
.menu-btn{display:none;margin-left:auto;border:0;background:#eef3ff;border-radius:14px;padding:10px 12px;font-weight:900;color:var(--navy)}
.hero{position:relative;overflow:hidden;padding:64px 0 50px;background:
  radial-gradient(circle at 8% 20%,rgba(255,216,77,.55) 0 11%,transparent 11.5%),
  radial-gradient(circle at 88% 25%,rgba(35,201,232,.36) 0 14%,transparent 14.5%),
  linear-gradient(180deg,#f7f3ff 0%,#fffdf8 100%)}
.hero:after{content:"";position:absolute;right:-70px;bottom:-80px;width:250px;height:250px;border:34px solid rgba(255,79,154,.16);border-radius:50%}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;background:#fff;border:2px solid var(--navy);border-radius:999px;padding:8px 13px;font-size:.86rem;font-weight:900;box-shadow:0 5px 0 var(--yellow)}
.hero h1{font-size:clamp(2.8rem,7vw,5.5rem);line-height:.92;letter-spacing:-.065em;margin:24px 0 18px;max-width:700px}
.hero h1 .pop{color:var(--blue);position:relative;display:inline-block}
.hero h1 .pop:after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:11px;background:var(--yellow);border-radius:999px;z-index:-1;transform:rotate(-2deg)}
.hero p{font-size:1.16rem;max-width:610px;color:var(--muted);font-weight:700}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 18px;border-radius:17px;font-weight:900;border:2px solid var(--navy);transition:transform .18s ease,box-shadow .18s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--pink);color:#fff;box-shadow:0 7px 0 #c52e72}
.btn-secondary{background:#fff;box-shadow:0 7px 0 #dfe5f2}
.hero-art{position:relative;min-height:430px}
.orbit-card{position:absolute;inset:30px 20px 20px 20px;border:3px solid var(--navy);border-radius:44px;background:#fff;box-shadow:0 16px 0 rgba(36,107,253,.13);overflow:hidden}
.orbit-card svg{width:100%;height:100%;object-fit:cover}
.sticker{position:absolute;z-index:3;background:#fff;border:3px solid var(--navy);border-radius:18px;padding:10px 14px;font-weight:900;box-shadow:0 7px 0 rgba(24,35,63,.12)}
.sticker.one{top:0;right:0;transform:rotate(5deg)}
.sticker.two{bottom:0;left:0;transform:rotate(-5deg)}
.sticker.three{top:42%;left:-18px;transform:rotate(-7deg)}
.section{padding:76px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.74rem;font-weight:900;color:var(--blue)}
h2{font-size:clamp(2rem,4.2vw,3.3rem);line-height:1.05;letter-spacing:-.045em;margin:6px 0 0}
.section-head p{max-width:560px;color:var(--muted);font-weight:700;margin:0}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.topic-card{position:relative;overflow:hidden;min-height:230px;border:3px solid var(--navy);border-radius:var(--radius);padding:24px;box-shadow:0 9px 0 rgba(24,35,63,.12);transition:transform .18s ease}
.topic-card:hover{transform:translateY(-4px) rotate(-.3deg)}
.topic-card .icon{font-size:2.2rem;margin-bottom:26px}
.topic-card h3{font-size:1.45rem;margin:0 0 8px;letter-spacing:-.03em}
.topic-card p{font-weight:700;margin:0;color:#28375c}
.topic-card .arrow{position:absolute;right:18px;bottom:16px;font-size:1.5rem;font-weight:900}
.t-blue{background:#cfe2ff}.t-yellow{background:#fff0a6}.t-pink{background:#ffd5e7}.t-cyan{background:#c9f4fb}.t-green{background:#d6f6e2}.t-purple{background:#e3d8ff}.t-orange{background:#ffe0c9}
.video-section{background:var(--navy);color:#fff}
.video-section .eyebrow{color:#7be8ff}.video-section .section-head p{color:#cfd7ee}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.video-card{background:#fff;color:var(--ink);border-radius:28px;overflow:hidden;border:3px solid #fff;box-shadow:0 12px 0 rgba(0,0,0,.18)}
.video-thumb{aspect-ratio:16/9;position:relative;overflow:hidden;background:linear-gradient(135deg,#ffe26d,#ff8ac1)}
.video-thumb.sky{background:linear-gradient(#5fc7ff 0 62%,#d8f4ff 62% 75%,#66cf73 75%)}
.video-thumb.moons{background:radial-gradient(circle at 72% 30%,#fff 0 8%,#dce6ff 8.5% 11%,transparent 11.5%),radial-gradient(circle at 50% 20%,#fff 0 5%,#dce6ff 5.5% 7%,transparent 7.5%),linear-gradient(#30397c,#141a4b)}
.video-thumb.popcorn{background:radial-gradient(circle at 50% 50%,#fff4bd 0 18%,#f7ca48 19% 28%,transparent 29%),linear-gradient(135deg,#ff805d,#ff4f9a)}
.play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--pink);font-size:1.5rem;border:3px solid var(--navy);box-shadow:0 8px 0 rgba(24,35,63,.2)}
.badge{position:absolute;left:14px;top:14px;background:var(--yellow);color:var(--navy);font-weight:900;padding:6px 10px;border-radius:999px;border:2px solid var(--navy);font-size:.78rem}
.video-body{padding:20px}
.video-body h3{font-size:1.3rem;margin:0 0 8px;letter-spacing:-.025em}
.video-body p{color:var(--muted);font-weight:700;margin:0 0 16px}
.watch-link{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:900}
.split{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.feature-box{border:3px solid var(--navy);border-radius:32px;padding:30px;box-shadow:0 10px 0 rgba(24,35,63,.1)}
.feature-box h3{font-size:1.8rem;margin:0 0 10px;letter-spacing:-.035em}
.feature-box p{color:var(--muted);font-weight:700}
.quiz{background:#fff1a8}.question{background:#d5f8ff}
.answer-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.pill{border:2px solid var(--navy);border-radius:999px;padding:9px 13px;background:#fff;font-weight:900}
.age-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.age-card{padding:22px;border-radius:24px;border:2px solid var(--line);background:#fff}
.age-card strong{display:block;font-size:1.25rem}.age-card span{color:var(--muted);font-weight:700;font-size:.93rem}
.read-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-card{background:#fff;border:2px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
.article-card .label{font-size:.76rem;text-transform:uppercase;letter-spacing:.12em;font-weight:900;color:var(--purple)}
.article-card h3{font-size:1.35rem;margin:8px 0}
.article-card p{color:var(--muted);font-weight:700}
.grownups{background:linear-gradient(135deg,#e9f6ff,#efe8ff);border-block:1px solid #dce5f8}
.grownups-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
.grownups-inner p{max-width:680px;color:var(--muted);font-weight:700}
.site-footer{background:#101a3c;color:#e8edff;padding:46px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px}
.site-footer h3,.site-footer h4{color:#fff}.site-footer p,.site-footer a{color:#c9d2ef}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin:8px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:20px;font-size:.9rem;color:#aeb8da}
.breadcrumb{font-size:.9rem;color:var(--muted);font-weight:800;padding-top:24px}.breadcrumb a{color:var(--blue)}
.page-hero{padding:48px 0 32px}.page-hero h1{font-size:clamp(2.5rem,6vw,4.6rem);line-height:1;letter-spacing:-.055em;margin:10px 0 12px}.page-hero p{max-width:760px;color:var(--muted);font-size:1.12rem;font-weight:700}
.article{max-width:820px;margin:auto;padding:32px 0 82px}.article h1{font-size:clamp(2.4rem,6vw,4.5rem);line-height:1;letter-spacing:-.055em}.article h2{font-size:2rem;margin-top:42px}.article p,.article li{font-size:1.07rem}.article .lead{font-size:1.25rem;color:var(--muted);font-weight:700}.fact-box{background:#e8f8ff;border:3px solid var(--navy);border-radius:24px;padding:22px;margin:28px 0;box-shadow:0 8px 0 rgba(24,35,63,.1)}
.meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;font-weight:800}.meta span{background:#f0f3f9;border-radius:999px;padding:7px 10px}
.video-placeholder{aspect-ratio:16/9;background:linear-gradient(135deg,#273a89,#6c54d8);border:3px solid var(--navy);border-radius:26px;display:grid;place-items:center;color:#fff;text-align:center;padding:24px;margin:28px 0;box-shadow:0 10px 0 rgba(24,35,63,.12)}
.video-placeholder strong{font-size:1.45rem}.video-placeholder small{display:block;margin-top:8px;color:#dfe5ff}
.notice{background:#fff2c4;border-left:6px solid var(--yellow);padding:16px 18px;border-radius:12px;margin:22px 0}
.simple-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;padding:0;list-style:none}.simple-list li{border:2px solid var(--line);border-radius:18px;padding:16px;background:#fff;font-weight:800}
.coming{opacity:.7}
@media (max-width:900px){
  .hero-grid,.split,.footer-grid{grid-template-columns:1fr}
  .hero-art{min-height:360px;max-width:600px;width:100%;margin:auto}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .video-grid,.read-grid{grid-template-columns:1fr 1fr}
  .age-strip{grid-template-columns:1fr 1fr}
  .section-head,.grownups-inner{align-items:flex-start;flex-direction:column}
  .nav-links{display:none;position:absolute;top:74px;left:16px;right:16px;background:#fff;border:2px solid var(--line);border-radius:20px;padding:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
  .nav-links.open{display:flex}.nav-links a{display:block}.menu-btn{display:block}
}
@media (max-width:620px){
  .container{width:min(100% - 22px,var(--max))}.hero{padding-top:42px}.hero-grid{gap:30px}.hero-art{min-height:300px}.orbit-card{inset:24px 8px 12px 8px;border-radius:30px}.sticker{font-size:.8rem;padding:8px 10px}.sticker.three{left:0}.section{padding:56px 0}.topic-grid,.video-grid,.read-grid,.age-strip,.simple-list{grid-template-columns:1fr}.topic-card{min-height:190px}.actions{flex-direction:column}.btn{width:100%}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* v2 upgrades */
.brand-mark{overflow:visible}.brand-mark img{width:44px;height:44px}.lang-link{border:2px solid var(--line)}
.hero{background:radial-gradient(circle at 15% 20%,#fff0a8 0 12%,transparent 13%),radial-gradient(circle at 92% 8%,#d9d1ff 0 10%,transparent 11%),linear-gradient(135deg,#fffdf8,#eef8ff)}
.mascot-card{position:absolute;inset:24px 16px 18px 26px;border:3px solid var(--navy);border-radius:44px;background:linear-gradient(145deg,#dff8ff,#fff6b8 55%,#ffe0ef);box-shadow:0 16px 0 rgba(36,107,253,.13);overflow:hidden;display:grid;place-items:center}.mascot-card img{width:min(82%,390px)}
.mascot-intro{display:flex;align-items:center;gap:14px;margin-top:28px;padding:13px 15px;background:#fff;border:2px solid var(--line);border-radius:19px;max-width:580px}.mascot-intro img{width:58px;height:58px}.mascot-intro strong{display:block}.mascot-intro span{color:var(--muted);font-weight:700;font-size:.92rem}
.t-lime{background:#e7f9bd}.topic-card.future{border-style:dashed;opacity:.82}
.quiz-btn{border:2px solid var(--navy);border-radius:999px;padding:9px 13px;background:#fff;font-weight:900;cursor:pointer}.quiz-btn:hover{transform:translateY(-1px)}.quiz-result{margin-top:15px;background:#fff;border:2px solid var(--navy);border-radius:15px;padding:12px 14px;font-weight:800;display:none}.quiz-result.show{display:block}
.progress-wrap{border:3px solid var(--navy);border-radius:32px;padding:28px;background:linear-gradient(135deg,#fff,#eefcff);box-shadow:0 10px 0 rgba(24,35,63,.1)}.progress-head{display:flex;justify-content:space-between;gap:20px;align-items:center}.progress-head p{margin:0;color:var(--muted);font-weight:700;max-width:620px}.badge-row{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:22px}.progress-badge{border:2px solid var(--line);border-radius:20px;background:#fff;padding:16px 10px;text-align:center;font-weight:900;opacity:.48}.progress-badge .big{font-size:2rem;display:block}.progress-badge.unlocked{opacity:1;border-color:var(--navy);box-shadow:0 6px 0 rgba(24,35,63,.1)}.privacy-note{margin-top:14px;color:var(--muted);font-size:.86rem;font-weight:700}
.resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.resource-card{border:2px solid var(--line);border-radius:24px;padding:22px;background:#fff;box-shadow:var(--shadow)}.resource-card h3{margin:6px 0}.resource-card p{color:var(--muted);font-weight:700}.resource-card .emoji{font-size:2.2rem}.btn-blue{background:var(--blue);color:#fff;box-shadow:0 7px 0 #1747ad}.btn-small{min-height:42px;padding:8px 13px;border-radius:14px}
.next-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.next-card{display:block;border:2px solid var(--line);border-radius:18px;padding:16px;background:#fff;font-weight:800}.next-card small{display:block;color:var(--purple);text-transform:uppercase;letter-spacing:.08em}.download-box{display:flex;gap:18px;align-items:center;border:3px solid var(--navy);background:#eaf8ff;border-radius:24px;padding:20px;margin:30px 0}.download-box .emoji{font-size:2.4rem}.download-box p{margin:4px 0;color:var(--muted);font-weight:700}.source-note{font-size:.9rem;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin-top:40px}.alt{background:#f6f8ff}
@media (max-width:900px){.progress-head{align-items:flex-start;flex-direction:column}.badge-row{grid-template-columns:repeat(3,1fr)}}
@media (max-width:620px){.mascot-card{inset:20px 6px 12px 6px;border-radius:30px}.badge-row{grid-template-columns:repeat(2,1fr)}.resource-grid,.next-grid{grid-template-columns:1fr}.download-box{align-items:flex-start}}