:root{--navy:#12355b;--navy-d:#0c2540;--accent:#f2a900;--ink:#1d2430;--muted:#5b6575;--bg:#f6f8fb}
*{box-sizing:border-box}
body{margin:0;font:18px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:#fff}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
h1{font-size:2.1rem;line-height:1.15;margin:.2em 0}
h2{color:var(--navy);font-size:1.45rem}
.hero{background:var(--navy);color:#fff;padding:48px 0 56px}
.hero-grid{display:grid;gap:32px}
.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.8rem;opacity:.8;margin:0}
.sub{font-size:1.15rem;opacity:.95}
.btn{display:inline-block;background:var(--accent);color:var(--navy-d);font-weight:700;text-decoration:none;padding:14px 24px;border-radius:8px}
.btn:hover{filter:brightness(1.05)}
.btn-lg{font-size:1.2rem;padding:18px 32px}
.cover{background:#fff;color:var(--navy);border-radius:6px;padding:28px 22px;max-width:240px;aspect-ratio:3/4;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 12px 30px rgba(0,0,0,.35);border-left:10px solid var(--accent)}
.cover strong{font-size:1.4rem;line-height:1.2}
.cover-tag{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.cover-author{font-size:.9rem;font-weight:600}
section{margin:40px auto}
.intro p{font-size:1.15rem}
.card{background:var(--bg);border-radius:12px;padding:8px 24px 16px}
.checks{list-style:none;padding:0}
.checks li{padding:8px 0 8px 30px;position:relative;border-bottom:1px solid #e3e8ef}
.checks li:last-child{border:0}
.checks li::before{content:"✓";position:absolute;left:0;color:var(--navy);font-weight:700}
blockquote{border-left:4px solid var(--navy);margin:20px 0;padding:8px 16px;background:var(--bg)}
.buy{text-align:center;border:2px solid var(--navy);border-radius:12px;padding:24px 20px}
.buy h2{font-size:2rem;margin:.2em 0}
.small{font-size:.85rem;color:var(--muted)}
.disclaimer p{font-size:.9rem;color:var(--muted)}
footer{background:var(--navy-d);color:#cfd8e3;padding:28px 0;margin-top:48px}
footer a{color:#fff}
footer .small{color:#9fb0c4}
@media(min-width:720px){h1{font-size:2.8rem}.hero-grid{grid-template-columns:1.6fr 1fr;align-items:center}}
html{scroll-behavior:smooth}
.wrap-wide{max-width:1040px;margin:40px auto;padding:0 20px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.btn-ghost{background:transparent;color:#fff;border:2px solid #fff;font-size:.95rem;padding:12px 20px}
.ba{display:grid;gap:20px}
.ba h3{color:var(--navy);font-size:1.1rem;margin:.4em 0}
.tag{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;background:#e3e8ef;color:var(--muted);padding:2px 8px;border-radius:10px;vertical-align:middle}
.paper{background:#f1f1ee;border:1px solid #ddd;padding:20px;font-family:Georgia,serif;font-size:.95rem;color:#333;border-radius:4px;box-shadow:0 2px 6px rgba(0,0,0,.06)}
.answer{background:#fff;border:2px solid var(--navy);border-radius:10px;padding:8px 20px;font-size:.98rem}
.answer ol{padding-left:20px}
.try{background:var(--bg);border-radius:12px;padding:16px 24px;margin-top:28px}
.try h3{color:var(--navy)}
.try pre{white-space:pre-wrap;background:#fff;border:1px solid #d5dce6;border-radius:8px;padding:16px;font-size:.9rem;font-family:ui-monospace,Menlo,Consolas,monospace}
.btn-copy{border:0;cursor:pointer;font:inherit;font-weight:700;background:var(--navy);color:#fff;padding:10px 20px}
.center{text-align:center}
.faq details{border-bottom:1px solid #e3e8ef;padding:12px 0}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy)}
.faq details p{margin:.6em 0 0}
.author{display:flex;gap:20px;align-items:flex-start}
.avatar{flex:0 0 88px;height:88px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.6rem;border:4px solid var(--accent)}
@media(min-width:800px){.ba{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.cover{display:none}.author{flex-direction:column}}