body {
  margin:0;
  font-family: system-ui, sans-serif;
  background:#f4f6f9;
  color:#222;
}
.topbar {
  background:#111827;
  color:#fff;
  padding:15px 30px;
  display:flex;
  justify-content:space-between;
}
.topbar a { color:#cbd5e1; margin-left:20px; text-decoration:none; }
.container { padding:30px; }
.footer {
  text-align:center;
  padding:20px;
  color:#6b7280;
}