:root{
  --brand:#17a34a; /* ногоон өнгө */
  --fg:#0a0a0a;
  --bg:#ffffff;
  --muted:#f3f4f6;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif;color:var(--fg);background:var(--bg);}
.container{max-width:920px;margin:40px auto;padding:24px;background:#fff;border:1px solid #e5e7eb;border-radius:16px}
h1{color:var(--brand)}
button{background:var(--brand);color:#fff;border:none;padding:10px 16px;border-radius:10px;font-weight:600;cursor:pointer}
button:hover{opacity:.9}