:root{
  --bg:#0b1020; --card:#12193a; --text:#e7ecff; --muted:#a9b4d0; --accent:#8ab4ff; --accent2:#a78bfa;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text);}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:24px}
.header{display:flex;align-items:center;justify-content:space-between;padding:18px 0;position:sticky;top:0;background:linear-gradient(180deg, rgba(11,16,32,.9), rgba(11,16,32,.7));backdrop-filter: blur(6px);z-index:10}
.nav a{margin:0 10px;font-weight:600}
.btn{display:inline-block;padding:12px 18px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1020;font-weight:700}
.btn.secondary{background:#1b2a6b;color:var(--text);border:1px solid #2a3c8b}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;align-items:center;padding:40px 0}
.card{background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:22px}
h1{font-size:44px;line-height:1.1;margin:.2em 0}
h2{font-size:28px;margin:28px 0 12px}
h3{font-size:20px;margin:16px 0 8px;color:var(--muted)}
p.lead{font-size:18px;color:var(--muted)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.badge{display:inline-block;padding:6px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.2);color:var(--muted);font-size:13px;margin-right:8px}
ul{padding-left:18px;color:var(--muted)}
.feature{padding:16px;border:1px dashed rgba(255,255,255,.12);border-radius:14px}
.section{padding:40px 0}
.footer{padding:28px 0;color:var(--muted);border-top:1px solid rgba(255,255,255,.1);margin-top:32px}
.kbd{border:1px solid rgba(255,255,255,.3);background:rgba(0,0,0,.2);padding:2px 6px;border-radius:6px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px}
.notice{background:#10224a;border-left:4px solid var(--accent);padding:12px 14px;border-radius:10px;color:var(--muted)}
.downloads a{display:block;padding:12px 14px;margin:10px 0;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:rgba(255,255,255,.03)}
.book{aspect-ratio:3/4;background:linear-gradient(135deg,#243b55,#141e30);border-radius:16px;border:1px solid rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:22px}
small, .muted{color:var(--muted)}
input,textarea{width:100%;padding:12px 14px;border-radius:12px;border:1px solid rgba(255,255,255,.15);background:#0f1633;color:var(--text)}
.form-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
}