/* Chess Books Reader */
:root{--bg:#0f1620;--bg-alt:#141c28;--surface:#1a2332;--surface-2:#2a3444;--text:#e8ecf1;--text-muted:#a8b2c0;--text-dim:#5a6474;--accent:#c9a961;--accent-hover:#d9bc7a;--border:#2a3444;--max:1080px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:16px}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-hover)}
h1,h2,h3,h4{font-family:Georgia,"Times New Roman",serif;line-height:1.25;font-weight:700}
h1{font-size:44px;margin-bottom:20px}
h2{font-size:32px;margin-bottom:12px}
h3{font-size:20px;margin-bottom:8px}
h4{font-size:15px;margin-bottom:12px;color:var(--text)}
.muted{color:var(--text-muted);font-size:14px}
.site-header{position:sticky;top:0;z-index:10;background:rgba(15,22,32,0.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-family:Georgia,serif;font-weight:700;font-size:17px}
.nav{display:flex;gap:24px;font-size:14px}
.nav a{color:var(--text-muted)}
.nav a:hover{color:var(--accent)}
.hero{padding:80px 0 60px;text-align:center}
.hero .lead{font-size:18px;color:var(--text-muted);max-width:640px;margin:0 auto 32px}
.hero-actions{display:flex;gap:12px;justify-content:center;margin-bottom:56px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 24px;border-radius:8px;font-size:15px;font-weight:600;border:none;cursor:pointer;font-family:inherit;transition:all .15s}
.btn-primary{background:var(--accent);color:#1a2332}
.btn-primary:hover:not(:disabled){background:var(--accent-hover)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.hero-shots{display:flex;gap:24px;justify-content:center;align-items:flex-end;flex-wrap:wrap}
.hero-shots img{display:block;width:220px;height:auto;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.hero-shots .shot-center{width:260px;transform:translateY(-16px)}
.section{padding:72px 0}
.section-alt{background:var(--bg-alt)}
.section-sub{color:var(--text-muted);margin-bottom:40px;font-size:16px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:32px}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px}
.feature-icon{font-size:32px;margin-bottom:12px}
.feature p{color:var(--text-muted);font-size:14px;margin-top:6px}
.pricing{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:32px}
.plan{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;display:flex;flex-direction:column}
.plan-featured{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),0 20px 60px rgba(201,169,97,.1)}
.badge{position:absolute;top:-12px;left:24px;background:var(--accent);color:#1a2332;font-size:12px;font-weight:700;padding:4px 12px;border-radius:12px}
.price{font-size:36px;font-family:Georgia,serif;font-weight:700;margin:12px 0 4px}
.price span{font-size:16px;color:var(--text-muted);font-weight:400}
.price-alt{color:var(--text-muted);font-size:14px;margin-bottom:20px}
.plan ul{list-style:none;margin:20px 0 28px;flex:1}
.plan ul li{padding:8px 0 8px 24px;position:relative;font-size:14px;color:var(--text)}
.plan ul li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}
.faq{margin-top:24px}
.faq details{border-bottom:1px solid var(--border);padding:16px 0}
.faq summary{cursor:pointer;font-weight:600;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::after{content:"+";color:var(--accent);font-size:20px}
.faq details[open] summary::after{content:"−"}
.faq p{color:var(--text-muted);font-size:14px;margin-top:12px}
.site-footer{border-top:1px solid var(--border);padding:48px 0 24px;background:var(--bg-alt)}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.footer-inner ul{list-style:none}
.footer-inner ul li{margin-bottom:8px;font-size:14px}
.footer-inner ul a{color:var(--text-muted)}
.footer-inner ul a:hover{color:var(--accent)}
.legal-req{margin-top:32px;padding-top:24px;border-top:1px solid var(--border);color:var(--text-dim);font-size:13px}
@media(max-width:700px){h1{font-size:30px}h2{font-size:24px}.nav{display:none}.hero{padding:48px 0 40px}.hero-shots img{width:160px}.hero-shots .shot-center{width:180px}.footer-inner{grid-template-columns:1fr}}