:root{
  --blue:#2563eb;
  --blue-dark:#1d4ed8;
  --ink:#0d1117;
  --muted:#5b6472;
  --bg:#ffffff;
  --bg-soft:#f6f8fb;
  --border:#e6e9ef;
  --radius:20px;
  --radius-sm:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.5;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.15;margin:0}
.muted{color:var(--muted)}

/* ── шапка ─────────────────────────────────────────────────────── */
.site-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;border-bottom:1px solid var(--border);
  position:sticky;top:0;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);z-index:50;
}
.site-header .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;text-decoration:none;flex-shrink:0}
.site-header .logo-img{height:34px;width:auto;flex-shrink:0;display:block}
.site-nav{display:flex;align-items:center;gap:28px}
.site-nav a{text-decoration:none;color:var(--ink);font-weight:500;font-size:15px}
.site-nav a:hover{color:var(--blue)}
.header-actions{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;font-weight:700;font-size:15px;
  text-decoration:none;cursor:pointer;border:none;white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-outline{background:transparent;color:var(--ink);border:1.5px solid var(--border)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-lg{padding:16px 30px;font-size:17px}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle svg{width:26px;height:26px}

@media (max-width:860px){
  .site-nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-outline{display:none}
}

/* ── секции ────────────────────────────────────────────────────── */
section{padding:72px 0}
.section-head{max-width:620px;margin:0 auto 40px;text-align:center}
.section-head h2{font-size:32px;margin-bottom:12px}
.section-head p{font-size:17px;color:var(--muted)}

footer{padding:40px 0;border-top:1px solid var(--border)}
.footer-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;align-items:center}
.footer-links{display:flex;gap:22px;flex-wrap:wrap}
.footer-links a{text-decoration:none;color:var(--muted);font-size:14px}
.footer-links a:hover{color:var(--blue)}

@media (max-width:600px){
  section{padding:48px 0}
  .section-head h2{font-size:26px}
}