body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f5f7fa;
  color: #111;
}

nav {
  background: #111827;
  color: white;
  padding: 0.75rem 1rem;
}

nav a {
  color: #9ca3af;
  margin-left: 1rem;
  text-decoration: none;
}

nav a.active { color: white; }

header { padding: 1rem; }

section { padding: 1rem; }

h2 { margin: 0 0 0.5rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 1rem;
}

.grid-small {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

iframe {
  width: 100%;
  height: 340px;
  border: none;
  background: white;
  border-radius: 8px;
}

iframe.small { height: 200px; }
iframe.map { height: 420px; }

footer { padding: 1rem; font-size: 0.9rem; }