:root{
  --ink:#121414; --muted:#4f5b5a; --paper:#fffdf8; --cream:#f5eedf;
  --brand:#0f5a58; --brand-dark:#0b3d3d; --teal-light:#7fc8c3; --accent:#d4a943; --line:#e7dfcc;
  --radius:14px; --max:1120px;
  --serif:Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6}
img{max-width:100%;display:block}
a{color:var(--brand)}
h1,h2,h3{font-family:var(--serif);line-height:1.2;margin:0 0 .5em;color:var(--brand-dark)}
h1{font-size:clamp(2.2rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.5vw,2.4rem)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.78rem;color:var(--accent);font-weight:700;margin:0 0 .75rem}
.lead{font-size:1.15rem;color:var(--muted);max-width:60ch}

/* header */
.site-header{position:sticky;top:0;z-index:10;background:rgba(250,246,239,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--brand-dark);font-family:var(--serif);font-size:1.3rem;font-weight:700}
.brand img{width:42px;height:42px;object-fit:contain}
.nav{display:flex;gap:1.6rem;align-items:center}
.nav a{text-decoration:none;color:var(--ink);font-weight:500}
.nav a:hover,.nav a[aria-current]{color:var(--brand)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:.45rem .7rem;font-size:1rem;cursor:pointer}

/* buttons */
.btn{display:inline-block;padding:.85rem 1.5rem;border-radius:999px;font-weight:600;text-decoration:none;border:2px solid var(--brand);background:var(--brand);color:#fff;cursor:pointer;font-size:1rem;transition:transform .15s,background .15s}
.btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--brand)}
.btn-ghost:hover{background:var(--cream)}
.btn-accent{background:var(--accent);border-color:var(--accent);color:var(--brand-dark)}
.btn-accent:hover{background:#bf9431}
.actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.6rem}

/* hero */
.hero{padding:5rem 0 4rem;background:radial-gradient(900px 500px at 85% 20%,#d7eeeb 0,transparent 60%),radial-gradient(700px 400px at 10% 90%,#f5eedf 0,transparent 60%)}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center}
.cover{border-radius:6px 14px 14px 6px;box-shadow:0 30px 60px -20px rgba(18,37,31,.45),0 10px 20px -10px rgba(18,37,31,.3);transform:rotate(-2deg);max-width:340px;margin:0 auto;width:100%}
.price-tag{display:inline-flex;align-items:baseline;gap:.5rem;margin-top:1rem;font-family:var(--serif);font-size:1.6rem;color:var(--brand-dark)}
.price-tag small{font-family:var(--sans);font-size:.9rem;color:var(--muted)}

section{padding:4.5rem 0}
.section-alt{background:var(--cream)}
.section-dark{background:var(--brand-dark);color:var(--cream)}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark .lead{color:#c9d3cf}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* features */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:2.5rem}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem}
.section-dark .card{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.12)}
.icon{width:44px;height:44px;border-radius:12px;background:var(--cream);display:grid;place-items:center;margin-bottom:1rem;color:var(--brand)}
.section-dark .icon{background:rgba(217,164,65,.15);color:var(--accent)}

/* products */
.products{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.6rem;margin-top:2.5rem}
.product{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}
.product:hover{box-shadow:0 18px 40px -20px rgba(18,37,31,.35);transform:translateY(-3px)}
.thumb{aspect-ratio:4/3;display:grid;place-items:center;padding:1.2rem;background:linear-gradient(135deg,var(--c1,#1f3a34),var(--c2,#0f1f1b));color:#fff;text-align:center;position:relative}
.thumb span{font-family:var(--serif);font-size:1.35rem;line-height:1.25;max-width:14ch}
.thumb .kind{position:absolute;top:.8rem;left:.8rem;background:rgba(255,255,255,.18);font-family:var(--sans);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;padding:.25rem .6rem;border-radius:999px}
.thumb img{max-height:100%;width:auto;box-shadow:0 10px 25px rgba(0,0,0,.35)}
.product-body{padding:1.3rem;display:flex;flex-direction:column;gap:.5rem;flex:1}
.product-body h3{font-size:1.2rem;margin:0}
.product-body p{margin:0;color:var(--muted);font-size:.95rem}
.product-foot{margin-top:auto;padding-top:1rem;display:flex;justify-content:space-between;align-items:center}
.price{font-weight:700;font-size:1.15rem;color:var(--brand-dark)}
.product-foot .btn{padding:.55rem 1.1rem;font-size:.92rem}

.filters{display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;margin-top:1.5rem}
.filters button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:.5rem 1.1rem;cursor:pointer;font:inherit}
.filters button.active{background:var(--brand);color:#fff;border-color:var(--brand)}

/* book detail */
.split{display:grid;grid-template-columns:.8fr 1.2fr;gap:3.5rem;align-items:start}
.checklist{list-style:none;padding:0;margin:1.2rem 0}
.checklist li{padding:.5rem 0 .5rem 2rem;position:relative;border-bottom:1px solid var(--line)}
.checklist li::before{content:"";position:absolute;left:0;top:.85rem;width:18px;height:18px;border-radius:50%;background:var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10l3 3 7-7' stroke='%2312251f' stroke-width='2.5' fill='none'/%3E%3C/svg%3E") center/12px no-repeat}
.toc{counter-reset:ch;list-style:none;padding:0}
.toc li{counter-increment:ch;padding:.9rem 0;border-bottom:1px solid var(--line);display:flex;gap:1rem}
.toc li::before{content:counter(ch,decimal-leading-zero);font-family:var(--serif);color:var(--accent);font-weight:700}
blockquote{margin:0;font-family:var(--serif);font-size:1.25rem;font-style:italic}
blockquote footer{font-family:var(--sans);font-style:normal;font-size:.9rem;margin-top:.8rem;color:var(--accent)}

/* newsletter */
.signup{display:flex;gap:.6rem;max-width:480px;margin:1.6rem auto 0}
.signup input{flex:1;padding:.85rem 1.1rem;border-radius:999px;border:1px solid var(--line);font:inherit}
.form-note{font-size:.85rem;color:var(--muted);margin-top:.8rem}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.3rem;margin-bottom:.8rem}
summary{cursor:pointer;font-weight:600}
details p{color:var(--muted);margin:.7rem 0 0}

/* footer */
.site-footer{background:var(--brand-dark);color:#c9d3cf;padding:3rem 0 2rem;font-size:.95rem}
.site-footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}
.site-footer a{color:#e8dfcf;text-decoration:none}
.site-footer a:hover{color:var(--accent)}
.site-footer h4{color:#fff;margin:0 0 .8rem;font-size:1rem}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.4rem}
.site-footer .brand{color:#fff}
.copy{border-top:1px solid rgba(255,255,255,.1);margin-top:2rem;padding-top:1.4rem;text-align:center;font-size:.85rem}

@media (max-width:860px){
  .hero .wrap,.split{grid-template-columns:1fr}
  .hero .cover{max-width:260px}
  .grid-3{grid-template-columns:1fr}
  .site-footer .wrap{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;top:72px;left:0;right:0;background:var(--paper);flex-direction:column;padding:1.2rem;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
  .signup{flex-direction:column}
}

.cover{aspect-ratio:720/985;object-fit:cover;object-position:top}
.thumb img{aspect-ratio:720/985;object-fit:cover;object-position:top;height:100%}
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;margin-top:2.5rem}
.pillar{background:#fff;border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:var(--radius);padding:1.5rem;text-align:left}
.pillar .icon{background:#e3f3f1}
.soon{opacity:.92}
.badge-soon{background:var(--cream);color:var(--brand-dark);font-size:.8rem;font-weight:700;padding:.3rem .7rem;border-radius:999px}
.paypal-note{font-size:.85rem;color:var(--muted);margin-top:.8rem}
.story p{font-size:1.08rem}
.story .signature{font-family:var(--serif);font-size:1.3rem;color:var(--brand)}
@media (max-width:860px){.pillars{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.pillars{grid-template-columns:1fr}}