html,
body {
  height: 100%;
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

body {
  display: flex;
  flex-direction: column;
}

.topbar {
  padding: 12px 16px;
  background: #111827;
  color: #fff;
  font-weight: 600;
}

#map {
  flex: 1;
}