:root{
  --bg:#0a0a0c; --bg2:#131317; --ink:#e6e2da; --muted:#8f8a86;
  --accent:#a5312e; --accent-2:#c9b28a; --line:#24242b; --maxw:1040px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--bg); color:var(--ink);
  font:16px/1.6 Georgia,"Times New Roman",serif; -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.brand{font-family:"Palatino Linotype",Palatino,Georgia,serif;letter-spacing:.02em}
a{color:var(--ink);text-decoration:none}
img{max-width:100%;display:block}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.center{text-align:center}
.muted{color:var(--muted)}

.site-head{display:flex;justify-content:space-between;align-items:center;gap:1rem;
  padding:1.1rem 1.4rem;border-bottom:1px solid var(--line);
  position:sticky;top:0;background:rgba(10,10,12,.88);backdrop-filter:blur(6px);z-index:10;}
.brand{font-size:1.15rem;letter-spacing:.26em;color:var(--ink);text-transform:uppercase}
.site-head nav a{margin-left:1.3rem;color:var(--muted);font-size:.82rem;letter-spacing:.16em;text-transform:uppercase}
.site-head nav a:hover{color:var(--accent)}

.hero{padding:5rem 1.4rem 3.5rem;border-bottom:1px solid var(--line);
  background:radial-gradient(1200px 600px at 50% -10%, #1a1013 0%, var(--bg) 60%);}
.hero-inner{max-width:760px;margin:0 auto;text-align:center}
.kicker{color:var(--accent);letter-spacing:.32em;text-transform:uppercase;font-size:.72rem;margin:0 0 1rem}
.hero h1{font-size:clamp(1.9rem,5vw,3.1rem);line-height:1.12;margin:0 0 1rem}
.lede{color:var(--muted);font-size:1.1rem;max-width:54ch;margin:0 auto 2rem}

.signup{display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;max-width:560px;margin:0 auto}
.signup input{flex:1 1 260px;min-width:0;padding:.85rem 1rem;border:1px solid var(--line);
  background:var(--bg2);color:var(--ink);border-radius:2px;font-size:1rem;}
.signup input:focus{outline:none;border-color:var(--accent)}
.signup button,.btn{padding:.85rem 1.4rem;border:0;border-radius:2px;cursor:pointer;
  background:var(--accent);color:#f7ece7;font-weight:bold;font-family:inherit;font-size:1rem;letter-spacing:.02em;}
.signup button:hover,.btn:hover{filter:brightness(1.1)}
.form-msg{flex-basis:100%;margin:.4rem 0 0;font-size:.9rem;min-height:1.2em}
.form-msg.ok{color:var(--accent-2)}
.form-msg.err{color:#e08a8a}
.fineprint{color:var(--muted);font-size:.82rem;margin-top:1.1rem}

.books{max-width:var(--maxw);margin:0 auto;padding:3.5rem 1.4rem}
.books h2,.cta h2{text-align:center;font-size:1.7rem;margin:0 0 2rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:2rem}
.book{text-align:center;cursor:pointer}
.book img{width:100%;max-width:260px;margin:0 auto 1rem;border:1px solid var(--line);
  box-shadow:0 18px 40px rgba(0,0,0,.6);transition:transform .18s ease,box-shadow .18s ease}
.book:hover img{transform:translateY(-4px);box-shadow:0 22px 48px rgba(0,0,0,.7)}
.book h3{font-size:1.2rem;margin:.2rem 0 .5rem}
.book p{color:var(--muted);font-size:.95rem;margin:0 auto;max-width:34ch}
.btn-ghost{display:inline-block;margin-top:2rem;color:var(--accent-2);border:1px solid var(--line);
  padding:.6rem 1.2rem;border-radius:2px;letter-spacing:.14em;text-transform:uppercase;font-size:.78rem}
.btn-ghost:hover{border-color:var(--accent)}

.cta{max-width:var(--maxw);margin:0 auto;padding:3rem 1.4rem 4.5rem;text-align:center;border-top:1px solid var(--line)}
.btn{display:inline-block;text-decoration:none}
.site-foot{border-top:1px solid var(--line);padding:2rem 1.4rem;text-align:center;color:var(--muted);font-size:.82rem}
.site-foot p{margin:.3rem 0}
.page{max-width:720px;margin:0 auto;padding:3.5rem 1.4rem}
.page h1{font-size:2.1rem;margin:0 0 1.2rem}
.page p{margin:0 0 1.1rem}

/* book detail modal */
.modal-overlay{position:fixed;inset:0;background:rgba(4,4,6,.9);display:none;
  align-items:center;justify-content:center;z-index:100;padding:1.5rem;backdrop-filter:blur(5px)}
.modal-overlay.open{display:flex}
.modal{background:var(--bg2);border:1px solid var(--line);border-radius:6px;max-width:780px;width:100%;
  max-height:90vh;overflow:auto;display:flex;gap:1.6rem;padding:1.6rem 1.6rem 1.8rem;position:relative}
.modal img{width:280px;max-width:42%;flex:0 0 auto;border:1px solid var(--line);border-radius:3px;
  box-shadow:0 16px 40px rgba(0,0,0,.6);align-self:flex-start}
.modal-body h3{margin:.3rem 0 1rem;font-size:1.6rem}
.modal-body p{color:var(--muted);font-size:1.02rem}
.modal-body .btn{display:inline-block;margin-top:1.3rem;text-decoration:none}
.modal-close{position:absolute;top:.3rem;right:.7rem;background:none;border:0;color:var(--muted);
  font-size:2.1rem;line-height:1;cursor:pointer}
.modal-close:hover{color:var(--accent)}
@media(max-width:560px){.modal{flex-direction:column;gap:1rem}.modal img{width:60%;max-width:210px;margin:0 auto}}