/* ============ Book Discovery — light theme ============ */
:root{
  --ink:#1c2331;
  --ink-soft:#4a5568;
  --muted:#8a94a6;
  --paper:#ffffff;
  --paper-alt:#f6f7fa;
  --line:#e6e9f0;
  --accent:#b8860b;
  --accent-dark:#9a6e07;
  --accent-soft:#fdf6e3;
  --green:#1f7a4d;
  --radius:14px;
  --shadow:0 10px 30px rgba(28,35,49,.08);
  --shadow-lg:0 18px 50px rgba(28,35,49,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--accent-dark);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1140px,92%);margin-inline:auto}
h1,h2,h3{font-family:Georgia,'Times New Roman',serif;line-height:1.25}
h1{font-size:clamp(1.9rem,4vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:1.25rem}
.section{padding:74px 0}
.section-alt{background:var(--paper-alt)}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-dark);margin-bottom:12px}
.lead{font-size:1.15rem;color:var(--ink-soft);max-width:46em}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}
.brand{font-family:Georgia,serif;font-size:1.3rem;font-weight:700;color:var(--ink)}
.brand span{color:var(--accent-dark)}
.main-nav{display:flex;gap:26px;align-items:center}
.main-nav a{color:var(--ink-soft);font-weight:600;font-size:.95rem}
.main-nav a:hover{color:var(--accent-dark);text-decoration:none}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:1.1rem;cursor:pointer;color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:700;font-size:.95rem;border:2px solid transparent;cursor:pointer;transition:.2s;text-align:center}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);text-decoration:none;transform:translateY(-1px)}
.btn-outline{border-color:var(--accent);color:var(--accent-dark);background:transparent}
.btn-outline:hover{background:var(--accent-soft);text-decoration:none}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:#17603c;text-decoration:none;transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:.87rem}
.btn-white{background:#fff;color:var(--accent-dark)}
.btn-white:hover{background:var(--accent-soft);text-decoration:none}
.btn-block{display:block;width:100%}

/* ---------- hero ---------- */
.hero{padding:80px 0 70px;background:linear-gradient(160deg,#fffdf7 0%,#fff 55%,#f4f6fb 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{margin:10px 0 18px}
.hero-images{display:flex;gap:18px;justify-content:center;align-items:flex-end}
.cover{width:100%;border-radius:8px;box-shadow:var(--shadow-lg);transition:transform .3s}
.cover:hover{transform:translateY(-6px)}
.hero-images .front{max-width:290px}
.hero-images .back{max-width:290px;transform:rotate(3deg)}
.hero-badges{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.badge{background:var(--accent-soft);color:var(--accent-dark);border:1px solid #f0e2bd;font-size:.78rem;font-weight:700;padding:6px 14px;border-radius:999px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-note{margin-top:16px;font-size:.88rem;color:var(--muted)}

/* ---------- cards grid ---------- */
.books-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:40px}
.book-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.25s;box-shadow:0 4px 14px rgba(28,35,49,.05)}
.book-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.book-card figcaption{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.book-card img{aspect-ratio:2/3;object-fit:cover;width:100%}
.book-card .author{font-size:.85rem;color:var(--accent-dark);font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.book-card .title{font-family:Georgia,serif;font-size:1.12rem;line-height:1.35}
.book-card .tagline{font-size:.9rem;color:var(--ink-soft);flex:1}
.card-actions{display:flex;gap:10px;margin-top:6px}

/* ---------- featured stats / value chips ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.chip{background:var(--paper-alt);border:1px solid var(--line);border-radius:999px;padding:7px 16px;font-size:.85rem;color:var(--ink-soft);font-weight:600}

/* ---------- where to buy ---------- */
.stores{display:flex;flex-wrap:wrap;gap:12px}
.store-btn{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:10px 18px;font-weight:700;font-size:.9rem;color:var(--ink);transition:.2s}
.store-btn:hover{border-color:var(--accent);color:var(--accent-dark);text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow)}
.store-note{font-size:.85rem;color:var(--muted);margin-top:12px}

/* ---------- modal ---------- */
.modal-backdrop{position:fixed;inset:0;background:rgba(28,35,49,.55);display:none;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-backdrop.open{display:flex}
.modal{background:#fff;border-radius:16px;max-width:430px;width:100%;padding:30px;box-shadow:var(--shadow-lg);position:relative;max-height:85vh;overflow:auto}
.modal h3{margin-bottom:6px}
.modal .modal-sub{color:var(--muted);font-size:.9rem;margin-bottom:18px}
.modal-close{position:absolute;top:14px;right:16px;background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--muted);line-height:1}
.modal .store-btn{width:100%;justify-content:flex-start}

/* ---------- book page ---------- */
.book-hero{background:linear-gradient(165deg,#fffdf7,#f4f6fb);padding:60px 0 64px}
.book-hero-grid{display:grid;grid-template-columns:340px 1fr;gap:52px;align-items:start}
.book-cover-wrap{position:relative}
.book-meta{list-style:none;margin:18px 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.book-meta li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:.85rem}
.book-meta b{display:block;font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:2px}
.buy-primary{margin:22px 0 14px;display:flex;gap:12px;flex-wrap:wrap}
.back-cover-strip{margin-top:26px;display:flex;gap:14px;align-items:center}
.back-cover-strip img{max-width:150px;border-radius:6px;box-shadow:var(--shadow)}
.prose{max-width:48em}
.prose p{margin:16px 0;color:var(--ink-soft);font-size:1.03rem}
.prose h2{margin:40px 0 8px}
.prose h3{margin:28px 0 6px}
.checklist{list-style:none;margin:14px 0}
.checklist li{padding:9px 0 9px 30px;position:relative;border-bottom:1px dashed var(--line)}
.checklist li::before{content:"✓";position:absolute;left:4px;color:var(--green);font-weight:800}
.toc-cols{columns:2;gap:40px;list-style:none;margin-top:12px}
.toc-cols li{padding:8px 0;border-bottom:1px solid var(--line);break-inside:avoid;font-size:.97rem;color:var(--ink-soft)}
.toc-cols li b{color:var(--ink)}
.pull-quote{border-left:4px solid var(--accent);background:var(--accent-soft);padding:18px 22px;border-radius:0 12px 12px 0;font-style:italic;font-family:Georgia,serif;font-size:1.1rem;margin:26px 0;color:var(--ink)}

/* ---------- breadcrumbs / misc ---------- */
.breadcrumbs{font-size:.85rem;color:var(--muted);margin-bottom:26px}
.breadcrumbs a{color:var(--muted)}
.sticky-buy{display:none}
.sticky-show{display:block}

/* ---------- footer ---------- */
.site-footer{background:#181f2c;color:#aab3c2;padding:56px 0 30px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:36px}
.site-footer h4{color:#fff;font-family:Georgia,serif;margin-bottom:14px}
.site-footer a{color:#aab3c2}
.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none;line-height:2}
.footer-bottom{border-top:1px solid #2a3243;padding-top:22px;font-size:.85rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr}
  .book-hero-grid{grid-template-columns:1fr;gap:34px}
  .books-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .toc-cols{columns:1}
}
@media(max-width:640px){
  .books-grid{grid-template-columns:1fr}
  .main-nav{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:18px 24px;border-bottom:1px solid var(--line);display:none}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero{padding:48px 0}
  .section{padding:52px 0}
}