:root{--ink:#1d2433;--muted:#5b6478;--bg:#fffdf8;--card:#fff;--brand:#ff6b4a;--brand2:#2f6fed;--sun:#ffd166;--mint:#e8f7f0;--line:#ece6da;--r:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Nunito","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:18px}
a{color:var(--brand2)}img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}.narrow{max-width:760px}
header.top{position:sticky;top:0;z-index:10;background:rgba(255,253,248,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:900;font-size:1.15rem;text-decoration:none;color:var(--ink);display:flex;gap:8px;align-items:center}
.logo-img{display:block;height:52px;width:auto}
.footer-mark{display:inline-block;width:40px;height:40px;margin-bottom:8px}
@media(max-width:640px){.logo-img{height:44px}}
nav a{margin-left:18px;text-decoration:none;color:var(--ink);font-weight:700;font-size:.95rem}
nav a.btn{color:#fff}
@media(max-width:640px){nav a:not(.btn){display:none}}
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:800;text-decoration:none;padding:12px 22px;border-radius:999px;border:0;cursor:pointer;font-size:1rem;box-shadow:0 4px 0 #d94f31;transition:transform .1s}
.btn:hover{transform:translateY(-1px)}.btn.ghost{background:#fff;color:var(--ink);box-shadow:0 4px 0 var(--line);border:2px solid var(--line)}
.btn.small{padding:8px 16px;font-size:.9rem}
.hero{padding:72px 0 56px;text-align:center}
.hero h1{font-size:clamp(2.1rem,5.5vw,3.6rem);line-height:1.1;margin:.2em 0;font-weight:900;letter-spacing:-.02em}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 60%,var(--sun) 60%)}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:640px;margin:16px auto 28px}
.pill{display:inline-block;background:var(--mint);color:#17694a;font-weight:800;font-size:.85rem;padding:6px 14px;border-radius:999px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
section{padding:56px 0}section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{font-size:clamp(1.6rem,3.5vw,2.3rem);line-height:1.2;margin:0 0 12px;font-weight:900}
.sub{color:var(--muted);margin-top:0}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:0 2px 0 var(--line)}
.card .emoji{font-size:2rem}.card h3{margin:.3em 0 .2em;font-size:1.15rem}.card p{margin:0;color:var(--muted);font-size:.98rem}
.lessons-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.lessons-list li a{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none;color:var(--ink)}
.lessons-list li a:hover{border-color:var(--brand)}
.num{flex:none;width:40px;height:40px;border-radius:50%;background:var(--sun);display:grid;place-items:center;font-weight:900}
.tag{font-size:.75rem;font-weight:800;padding:3px 10px;border-radius:999px;margin-left:auto;white-space:nowrap}
.tag.free{background:var(--mint);color:#17694a}.tag.lock{background:#f3efe7;color:var(--muted)}
.price{max-width:460px;margin:0 auto;text-align:center;border:3px solid var(--ink);border-radius:24px;padding:32px;background:#fff}
.price .amt{font-size:3rem;font-weight:900;margin:6px 0}.price ul{text-align:left;padding-left:1.2em}
.todo{display:block;font-size:.8rem;color:#9a5b00;background:#fff4d6;border:1px dashed #e0b44a;border-radius:10px;padding:8px 12px;margin-top:14px;text-align:left}
.signup{background:var(--ink);color:#fff;border-radius:24px;padding:40px;text-align:center}
.signup h2{color:#fff}.signup p{color:#c9cfdc}
.signup form{display:flex;gap:10px;max-width:480px;margin:20px auto 0;flex-wrap:wrap}
.signup input{flex:1;min-width:200px;padding:14px 18px;border-radius:999px;border:0;font-size:1rem}
.signup .todo{max-width:480px;margin:14px auto 0}
details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin-bottom:10px}
summary{font-weight:800;cursor:pointer}
footer{padding:40px 0;color:var(--muted);font-size:.9rem;text-align:center}
/* lesson */
.lesson-head{padding:48px 0 20px}.lesson-head h1{font-size:clamp(1.9rem,4.5vw,2.8rem);line-height:1.15;margin:.3em 0}
.box{border-radius:var(--r);padding:22px 24px;margin:26px 0}
.box h2{font-size:1.3rem;margin-bottom:8px}
.analogy{background:#fff4d6;border:2px solid var(--sun)}
.ideas{background:#fff;border:1px solid var(--line)}
.try{background:var(--mint);border:2px solid #9ad9bd}
.quiz{background:#eef3ff;border:2px solid #b9cdfa}
.q{margin:18px 0}.q p{font-weight:800;margin:0 0 8px}
.q label{display:block;background:#fff;border:1px solid #d6e0f7;border-radius:10px;padding:10px 14px;margin:6px 0;cursor:pointer}
.q label.right{background:#dff5e9;border-color:#3fb37f}.q label.wrong{background:#fde3dd;border-color:#ff6b4a}
.q .why{display:none;font-size:.95rem;color:var(--muted);margin-top:6px}.q.done .why{display:block}
.lesson-nav{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:40px 0}
.paywall{text-align:center;background:#fff;border:2px dashed var(--brand);border-radius:var(--r);padding:20px;margin:30px 0}
.crumbs{font-size:.9rem}.crumbs a{text-decoration:none}
pre.prompt{white-space:pre-wrap;background:#fff;border:1px solid #9ad9bd;border-radius:10px;padding:12px 14px;font-family:ui-monospace,Menlo,monospace;font-size:.92rem}
.gift-pitch{font-size:.95rem;color:var(--muted);margin:12px 0 0;text-align:center}
.gift-form{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}
.gift-form label{font-weight:800;font-size:.9rem}.gift-form .wide{grid-column:1/-1}
.gift-form input,.gift-form textarea{display:block;width:100%;margin-top:4px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;font:inherit}
.giftcard{background:linear-gradient(135deg,#fff4d6,#ffe1d8);border:3px dashed var(--brand);border-radius:24px;padding:34px;text-align:center;max-width:620px;margin:0 auto}
.giftcard h2{font-size:clamp(1.6rem,4vw,2.2rem);margin:10px 0}.gc-top{font-weight:900}.gc-top img{display:inline-block;height:50px;width:auto}
.gc-sub{color:var(--muted)}.gc-names{font-size:1.1rem}.gc-msg{font-style:italic;font-size:1.15rem;margin:16px 0}
.gc-access{background:#fff;border-radius:12px;padding:12px;word-break:break-all;font-size:.95rem}.gc-foot{font-size:.85rem;color:var(--muted);margin-bottom:0}
@media(max-width:560px){.gift-form{grid-template-columns:1fr}}
.send-gift{background:#fff;border:2px solid var(--sun);border-radius:var(--r);padding:22px 18px;margin:0 auto 26px;max-width:620px;text-align:center;box-shadow:0 4px 0 var(--line)}
.send-gift h2{margin:0 0 4px;font-size:1.4rem}.send-sub{color:var(--muted);margin:0 0 16px;font-size:.98rem}
.send-btns{display:grid;grid-template-columns:1fr;gap:12px}
.send-btn{display:flex;align-items:center;justify-content:center;gap:8px;min-height:56px;font-size:1.1rem;padding:14px 20px;width:100%;box-sizing:border-box;font-family:inherit}
.send-btn.alt{background:var(--brand2);box-shadow:0 4px 0 #1f53c4}
.send-btn[hidden]{display:none!important}
.send-btn.disabled{opacity:.45;pointer-events:none}
.send-msg{min-height:1.2em;margin:12px 0 0;color:#17694a;font-weight:800;font-size:.95rem}.send-missing{color:var(--muted);font-size:.95rem;margin:12px 0 0}
@media(min-width:600px){.send-btns{grid-template-columns:1fr 1fr}}
@media print{header.top,footer,.no-print{display:none!important}body{background:#fff}.giftcard{border-color:#999;-webkit-print-color-adjust:exact;print-color-adjust:exact}}
.legal h2{font-size:1.45rem;margin:34px 0 8px}.legal ul{padding-left:1.2em}.legal li{margin:6px 0}.legal-foot{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted)}footer a{color:var(--muted)}