/* Базовые стили, контраст и крупная типографика для удобства пожилых пользователей */
:root{--bg:#f6f8fb;--paper:#ffffff;--text:#1f2a32;--muted:#5b6a75;--primary:#2e7d6b;--accent:#f0a33e;--line:#e3e8ee;--radius:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:18px}
img{max-width:100%;display:block;border-radius:var(--radius)}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.lead{font-size:1.2rem;color:var(--muted)}
.center{text-align:center}
.mt{margin-top:20px}

.site-header{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;gap:16px;padding:12px 0}
.brand{font-weight:800;color:var(--primary);text-decoration:none;font-size:1.2rem}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.site-nav a{color:var(--text);text-decoration:none;padding:8px 10px;border-radius:10px}
.site-nav li.active>a{background:var(--line)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:6px 10px;font-size:20px}

.site-footer{border-top:1px solid var(--line);background:var(--paper);margin-top:40px}
.footer-inner{display:flex;gap:16px;justify-content:space-between;align-items:center;padding:20px 0;flex-wrap:wrap}
.disclaimer{color:var(--muted);font-size:.95rem}

.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;align-items:center;padding:28px 0}
.hero h1{font-size:2rem;margin:0 0 10px}
.hero .lead{margin:0 0 16px}
.benefits{margin:14px 0 0;padding:0 0 0 18px}

.features .grid-3,.book-preview .grid-3,.testimonials .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.card .num{font-weight:700;color:var(--primary);font-size:1.2rem}

.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;margin:24px auto}
.page-head{padding:20px 0}
.note{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-top:16px}
.checklist{padding-left:18px}
.testimonial figcaption{margin-top:10px}
.author{color:var(--muted);font-size:.95rem;margin-top:6px}

.btn{display:inline-block;background:#e9eef3;color:var(--text);padding:10px 14px;border-radius:12px;text-decoration:none;border:1px solid var(--line)}
.btn:hover{filter:brightness(0.98)}
.btn-primary{background:var(--primary);color:#fff;border-color:transparent}
.btn-accent{background:var(--accent);color:#111;border-color:transparent}
.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}

.form-wrap form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
label{display:block;font-weight:600;margin-bottom:10px}
input,textarea{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;font-size:1rem}
.checkbox{display:flex;gap:10px;align-items:flex-start}
.checkbox input{width:auto;margin-top:6px}
.form-note{font-size:.95rem}

.cta .cta-inner{background:linear-gradient(135deg,var(--primary),#3c9b89);color:#fff;border-radius:20px;padding:24px;text-align:center}

@media (max-width: 900px){
  .grid-3{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr}
  .hero{grid-template-columns:1fr}
}
@media (max-width: 640px){
  body{font-size:17px}
  .grid-2,.grid-3,.features .grid-3,.book-preview .grid-3,.testimonials .grid-3{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .site-nav{display:none}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;align-items:flex-start;padding:10px 0}
}