:root{--blue:#073a83;--blue2:#0952ab;--navy:#061d3f;--cyan:#13b9df;--accent:#ff8a47;--accent-dark:#e76828;--orange:#ff8a26;--ink:#152235;--muted:#627087;--bg:#f4f7fb;--white:#fff;--line:#dbe4ef;--shadow:0 18px 60px rgba(4,34,78,.14);--radius:22px;--container:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}.container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}.narrow{max-width:880px}.center{text-align:center}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:16px;top:16px;z-index:999;background:#fff;padding:10px 14px;border-radius:8px}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(8,55,115,.08)}.nav-wrap{height:76px;display:flex;align-items:center;gap:28px}.brand img{width:145px;max-height:42px}.desktop-nav{display:flex;gap:24px;margin-left:auto;font-size:.94rem;font-weight:650;color:#40506a}.desktop-nav a:hover{color:var(--blue2)}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:14px 22px;font-weight:800;line-height:1.1;transition:.2s ease;border:1px solid transparent;cursor:pointer}.btn:hover{transform:translateY(-2px);box-shadow:0 12px 25px rgba(3,36,82,.18)}.btn-small{padding:11px 16px;background:var(--blue);color:#fff}.btn-primary{background:linear-gradient(135deg,#ff9a5c,var(--accent-dark));color:#fff}.btn-accent{background:linear-gradient(135deg,#ff9a32,#ff6f1e);color:#fff;box-shadow:0 10px 28px rgba(255,112,30,.28)}.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.06)}.btn-wide{width:100%;font-size:1.08rem;padding:17px}.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(circle at 75% 28%,rgba(27,157,230,.28),transparent 32%),linear-gradient(135deg,#061b3c 0%,#073a83 58%,#0659a5 100%)}.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(to bottom,black,transparent 92%)}.hero-grid{position:relative;min-height:680px;display:grid;grid-template-columns:1.25fr .75fr;align-items:center;gap:70px;padding-block:72px}.eyebrow{font-size:.76rem;letter-spacing:.16em;font-weight:900;color:#9cecff;margin-bottom:14px}.eyebrow.dark{color:var(--blue2)}h1,h2,h3{line-height:1.12;margin:0}h1{font-size:clamp(2.5rem,5vw,4.8rem);letter-spacing:-.055em;max-width:850px}h2{font-size:clamp(2rem,3.6vw,3.25rem);letter-spacing:-.04em}h3{font-size:1.15rem}.lead{font-size:1.22rem;max-width:760px;color:#d9e7fa;margin:24px 0}.hero-points{display:flex;flex-wrap:wrap;gap:10px 20px;color:#e4f1ff;font-weight:650}.hero-actions{display:flex;gap:12px;margin-top:32px}.microcopy{margin-top:13px;color:#b8c9df;font-size:.86rem}.hero-visual{position:relative;display:flex;justify-content:center;align-items:center}.book-cover{position:relative;z-index:2;width:min(365px,82%);height:auto;max-height:560px;object-fit:contain;aspect-ratio:auto;border-radius:6px;box-shadow:0 35px 70px rgba(0,0,0,.44);transform:perspective(900px) rotateY(-7deg) rotateX(1deg)}.book-glow{position:absolute;width:420px;height:420px;background:#49a7ff;border-radius:50%;filter:blur(90px);opacity:.25}.format-badge{position:absolute;z-index:3;right:0;bottom:18%;background:#fff;color:var(--blue);padding:12px 16px;border-radius:14px;box-shadow:var(--shadow);display:flex;flex-direction:column}.format-badge b{font-size:1.2rem}.format-badge span{font-size:.75rem}.trust-strip{background:#fff;border-bottom:1px solid var(--line)}.trust-grid{display:grid;grid-template-columns:repeat(3,1fr)}.trust-grid>div{padding:24px 28px;border-right:1px solid var(--line);display:flex;flex-direction:column}.trust-grid>div:last-child{border:0}.trust-grid b{color:var(--blue);font-size:1.04rem}.trust-grid span{font-size:.9rem;color:var(--muted)}.section{padding:100px 0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.section-copy p{font-size:1.08rem;color:var(--muted)}.section-heading{max-width:780px;margin-bottom:42px}.section-heading.center{margin-inline:auto;margin-bottom:48px}.section-heading p{color:var(--muted);font-size:1.08rem}.check-list{list-style:none;padding:0;margin:25px 0;display:grid;gap:13px}.check-list li{position:relative;padding-left:30px}.check-list li:before{content:"✓";position:absolute;left:0;color:#38b12b;font-weight:900}.check-list.warning li:before{content:"×";color:#e34a35;font-size:1.2rem}.media-card,.diagram-card{margin:0;border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}.media-card img{aspect-ratio:3/2;object-fit:cover}.media-card figcaption{padding:18px 22px;color:var(--muted);font-size:.9rem}.blue-section{background:linear-gradient(145deg,#061f48,#073f8e);color:#fff}.blue-section .section-heading p{color:#bed1eb}.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.13);padding:28px;border-radius:18px}.feature-card span{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--accent);color:#4a1d08;font-weight:900}.feature-card h3{font-size:1.22rem;margin:18px 0 10px}.feature-card p{color:#c7d8ed;margin:0}.architecture-section{background:var(--bg)}.diagram-card img{width:100%;min-height:360px;object-fit:cover}.chapters{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px}.chapters details,.faq details{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}.chapters summary,.faq summary{cursor:pointer;list-style:none;padding:18px 20px;font-weight:800}.chapters summary::-webkit-details-marker,.faq summary::-webkit-details-marker{display:none}.chapters summary{display:flex;align-items:center;gap:14px}.chapters summary span{color:var(--blue2);font-size:.78rem;letter-spacing:.1em}.chapters details p,.faq details p{margin:0;padding:0 20px 20px;color:var(--muted)}.chapters details[open],.faq details[open]{border-color:#a9c3e4;box-shadow:0 8px 24px rgba(5,49,103,.07)}.audience-section{background:var(--bg)}.audience-grid{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.audience-grid span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:11px 18px;font-weight:700;color:#394a62}.author-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:45px;box-shadow:var(--shadow)}.author-card p{color:var(--muted)}
.author-card{display:grid;grid-template-columns:1.3fr 260px 1fr;align-items:center;gap:40px}
.author-left h2{font-size:2.2rem;margin:.2rem 0 1rem}
.author-photo img{width:230px;height:230px;border-radius:50%;object-fit:cover;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.author-right h3{margin-top:0;color:var(--blue2)}
.author-line{width:60px;height:3px;background:#2f6df6;margin:14px 0 20px}
@media(max-width:900px){.author-card{grid-template-columns:1fr;text-align:center}.author-photo{justify-self:center}.author-line{margin:14px auto 20px}}
.offer-section{background:linear-gradient(145deg,#061c3f,#074d9f)}.offer-card{display:grid;grid-template-columns:320px 1fr;gap:58px;align-items:center;color:#fff}.offer-cover{display:flex;align-items:center;justify-content:center}.offer-cover img{display:block;width:auto;max-width:300px;height:auto;max-height:560px;object-fit:contain;aspect-ratio:auto;border-radius:5px;box-shadow:0 25px 55px rgba(0,0,0,.4);transform:rotate(-2deg)}.offer-copy p,.check-list.light{color:#d7e6f9}.check-list.light li:before{color:#ffb184}.price-row{display:flex;align-items:end;justify-content:space-between;border-top:1px solid rgba(255,255,255,.18);padding-top:20px;margin:22px 0 16px}.price-row span{color:#bcd0e9}.price-row strong{font-size:2.4rem}.offer-copy small{display:block;color:#abc1dc;margin-top:12px}.faq{display:grid;gap:12px}.final-cta{padding:80px 0;background:linear-gradient(100deg,#eaf3ff,#fff1e8)}.final-cta p{color:var(--muted);font-size:1.1rem}.site-footer{background:#06172f;color:#c6d3e5;padding:44px 0 24px}.footer-grid{display:grid;grid-template-columns:170px 1fr auto;gap:28px;align-items:center}.footer-grid img{width:150px;filter:brightness(0) invert(1)}.footer-grid>div{display:flex;flex-direction:column}.footer-grid a:hover{color:#fff}.legal{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:20px;font-size:.84rem}.mobile-buy{display:none}.reveal{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s ease}.reveal.visible{opacity:1;transform:none}
@media(max-width:920px){.desktop-nav{display:none}.hero-grid{grid-template-columns:1fr .65fr;gap:28px;min-height:620px}.two-col{gap:36px}.cards-grid{grid-template-columns:1fr 1fr}.chapters{grid-template-columns:1fr}.offer-card{grid-template-columns:240px 1fr}.offer-cover img{max-width:230px;width:auto;height:auto}}
@media(max-width:700px){body{padding-bottom:76px}.container{width:min(100% - 28px,var(--container))}.site-header .btn-small{display:none}.nav-wrap{height:66px}.brand img{width:132px}.hero-grid{grid-template-columns:1fr;padding-block:54px 72px}.hero-copy{text-align:center}.hero-points,.hero-actions{justify-content:center}.hero-visual{margin-top:24px}.book-cover{width:245px;transform:none}.format-badge{right:7%;bottom:12%}h1{font-size:2.55rem}.lead{font-size:1.05rem}.trust-grid{grid-template-columns:1fr}.trust-grid>div{border-right:0;border-bottom:1px solid var(--line);padding:17px 4px}.section{padding:72px 0}.two-col,.author-card,.offer-card{grid-template-columns:1fr}.reverse-mobile .diagram-card{order:2}.cards-grid{grid-template-columns:1fr}.media-card img{aspect-ratio:4/3}.author-card{padding:28px;gap:22px}.author-monogram{width:95px;height:95px}.offer-card{text-align:center}.offer-cover img{margin:auto;max-width:210px;width:auto;height:auto}.check-list{text-align:left}.footer-grid{grid-template-columns:1fr;text-align:center;justify-items:center}.footer-grid>div{align-items:center}.mobile-buy{position:fixed;z-index:60;bottom:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.97);border-top:1px solid var(--line);box-shadow:0 -8px 26px rgba(0,0,0,.12)}.mobile-buy>div{display:flex;flex-direction:column;line-height:1.15}.mobile-buy span{font-size:.74rem;color:var(--muted)}.mobile-buy b{color:var(--blue)}.mobile-buy .btn{padding:12px 20px}.hero-actions .btn{flex:1}.section-heading{margin-bottom:30px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.btn{transition:none}}

.problem-card{
    display:block;
    width:100%;
    overflow:hidden;
    border-radius:var(--radius);
    background:#fff;
    box-shadow:var(--shadow);
}

.problem-card img{
    display:block;
    width:100%;
    height:auto;
    max-width:100%;
    max-height:none;
    aspect-ratio:auto !important;
    object-fit:contain !important;
    border-radius:var(--radius) var(--radius) 0 0;
}

.problem-card figcaption{
    display:block;
    width:100%;
    padding:18px 22px;
    margin:0;
    color:var(--muted);
    font-size:.9rem;
    background:#fff;
}