:root{
  --bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2fd27a;
  --primary-contrast: #0b4126;
  --border: #e5e7eb;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --accent: #134a8e;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand .logo{height:40px}
.menu{display:flex;gap:18px;align-items:center}
.menu a{color:var(--text);text-decoration:none}
.btn{display:inline-block;padding:10px 16px;border:1px solid var(--border);border-radius:10px;text-decoration:none;color:var(--text)}
.btn-primary{background:var(--primary);color:var(--primary-contrast);border-color:transparent;font-weight:700}
.btn-outline{background:var(--surface);color:var(--accent);border:1px solid var(--accent)}

.hero{background:var(--surface-alt);border-bottom:1px solid var(--border)}
.hero-content{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;padding:40px 0}
.hero h1{font-size:2rem;margin:.5rem 0}
.hero .card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px}

input,select{width:100%;padding:10px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--text)}
label{font-size:.9rem;color:var(--muted)}

.section{padding:40px 0;border-bottom:1px solid var(--border)}
.section.alt{background:var(--surface-alt)}
.section h2{font-size:1.6rem;margin:0 0 16px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.steps article{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}

.footer{padding:24px 0;background:var(--surface-alt)}
.footer h4{margin:0 0 8px}
.footer .flat{list-style:none;padding:0;margin:0}
.footer .flat li{margin:6px 0}
.center{text-align:center}
.muted{color:var(--muted)}

@media (max-width: 900px){
  .hero-content{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
}