:root{
  --ink:#102b33;
  --teal:#157d86;
  --teal-dark:#0b5962;
  --gold:#c7a45b;
  --cream:#f7f5ef;
  --paper:#ffffff;
  --muted:#68777b;
  --line:#dce4e3;
  --shadow:0 18px 45px rgba(16,43,51,.10);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);line-height:1.65}
img{max-width:100%;display:block}
a{color:inherit}
.container{width:min(1160px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,228,227,.85)}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand img{width:72px;height:72px;object-fit:contain}
.nav-links{display:flex;align-items:center;gap:26px;font-size:.92rem;font-weight:650}
.nav-links a{text-decoration:none;opacity:.8}
.nav-links a:hover{opacity:1;color:var(--teal)}
.nav-amazon{padding:10px 16px;border:1px solid var(--teal);border-radius:999px;color:var(--teal)!important;opacity:1!important}
.hero{position:relative;min-height:650px;overflow:hidden;background:var(--ink);color:#fff}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1s ease}
.hero-slide.active{opacity:1}
.hero-slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,29,35,.92) 0%,rgba(7,29,35,.70) 43%,rgba(7,29,35,.18) 100%)}
.hero-content{position:relative;z-index:2;padding:105px 0 125px;max-width:720px}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.74rem;font-weight:800;color:#d9c37f;margin-bottom:18px}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.12;margin:0 0 18px}
h1{font-size:clamp(3rem,7vw,5.6rem);letter-spacing:-.04em}
h2{font-size:clamp(2.2rem,4vw,3.5rem)}
h3{font-size:1.5rem}
.lead{font-size:1.18rem;color:rgba(255,255,255,.86);max-width:650px}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 20px;border-radius:999px;text-decoration:none;font-weight:750;font-size:.92rem;transition:.2s ease}
.btn-primary{background:#fff;color:var(--ink)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-outline{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-amazon{background:#f0d36f;color:#152f35}
.btn-amazon:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(0,0,0,.12)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.section{padding:92px 0}
.section-tint{background:var(--cream)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:38px}
.section-head p{max-width:560px;color:var(--muted);margin:0}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
.pullquote{font:italic 1.7rem/1.3 Georgia,serif;color:var(--teal-dark);border-left:3px solid var(--gold);padding-left:24px}
.catalog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 6px 24px rgba(16,43,51,.04);transition:.22s ease}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.cover-wrap{height:390px;background:#eef2f0;display:flex;align-items:center;justify-content:center;padding:18px}
.cover-wrap img{width:100%;height:100%;object-fit:contain}
.card-body{padding:22px}
.tag{display:inline-block;text-transform:uppercase;letter-spacing:.12em;font-size:.66rem;font-weight:800;color:var(--teal);margin-bottom:9px}
.card h3{font-size:1.25rem;margin-bottom:7px}
.author{color:var(--muted);font-size:.9rem;margin-bottom:15px}
.card .btn{width:100%;justify-content:center}
.catalog-tools{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}
.filter{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 15px;cursor:pointer;font:inherit;font-size:.83rem;color:var(--ink)}
.filter.active,.filter:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.book-hero{padding:80px 0;background:linear-gradient(135deg,var(--cream),#fff)}
.book-grid{display:grid;grid-template-columns:minmax(280px,430px) 1fr;gap:80px;align-items:start}
.book-cover{background:#edf1ef;border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.book-cover img{width:100%;height:560px;object-fit:contain}
.book-meta{display:grid;grid-template-columns:auto 1fr;gap:7px 18px;font-size:.9rem;margin:25px 0 30px}
.book-meta dt{font-weight:750;color:var(--muted)}
.book-meta dd{margin:0}
.prose{color:#33474c}
.prose p{max-width:780px}
.prose ul{padding-left:1.25rem}
.prose li{margin:5px 0}
.back{display:inline-block;color:var(--teal);font-weight:700;text-decoration:none;margin-bottom:20px}
.about{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.about-image{border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.about-image img{width:100%;height:430px;object-fit:cover}
.cta{background:var(--ink);color:#fff;border-radius:28px;padding:58px;display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta p{color:rgba(255,255,255,.72);margin:0}
.site-footer{background:#081f25;color:#dce7e7;padding:55px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:45px}
.footer-brand img{width:82px;filter:brightness(0) invert(1);opacity:.9}
.footer-grid h3{font-size:1.15rem;color:#fff}
.footer-grid a{text-decoration:none;color:#c5d2d2}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:20px;font-size:.78rem;color:#91a4a7}
.notice{background:#eef7f5;border:1px solid #cfe5e1;border-radius:14px;padding:16px 18px;color:var(--teal-dark)}
@media(max-width:980px){
 .catalog-grid{grid-template-columns:repeat(3,1fr)}
 .book-grid,.intro-grid,.about{grid-template-columns:1fr;gap:45px}
 .book-cover{max-width:480px;margin:auto;width:100%}
 .section-head{display:block}
 .section-head p{margin-top:14px}
}
@media(max-width:720px){
 .container{width:min(100% - 28px,1160px)}
 .nav{height:70px}.brand img{width:62px;height:62px}
 .nav-links{gap:13px;font-size:.76rem}.nav-links a:nth-child(2){display:none}
 .nav-amazon{padding:8px 11px}
 .hero{min-height:590px}.hero-content{padding:90px 0}
 .catalog-grid{grid-template-columns:repeat(2,1fr);gap:14px}
 .cover-wrap{height:300px;padding:12px}.card-body{padding:16px}.card h3{font-size:1.08rem}
 .cta{padding:38px 26px;display:block}.cta .btn{margin-top:22px}
 .footer-grid{grid-template-columns:1fr}
 .book-cover img{height:480px}
}
@media(max-width:480px){
 .catalog-grid{grid-template-columns:1fr}
 .cover-wrap{height:430px}
 h1{font-size:2.8rem}
 .hero-actions .btn{width:100%;justify-content:center}
}