:root{
  --maxw: 1000px;
  --accent: #2563eb;
  --muted: #666;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}
*{box-sizing:border-box}
body{margin:0;color:#111;line-height:1.5}
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.site-header{background:#fff;border-bottom:1px solid #eee;position:sticky;top:0;z-index:10}
.logo{margin:0;font-size:1.25rem}
.nav a{margin-left:16px;text-decoration:none;color:var(--muted)}
.hero{padding:48px 0;text-align:center}
.btn{padding:10px 18px;background:var(--accent);color:#fff;text-decoration:none;border-radius:8px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;padding:24px 0}
.features article{border:1px solid #eee;padding:16px;border-radius:8px}
.contact form{display:grid;gap:10px;max-width:600px}
.contact input,.contact textarea{width:100%;padding:10px;border:1px solid #ccc;border-radius:6px}
.site-footer{text-align:center;color:var(--muted);padding:16px}