body { margin: 0; font-family: system-ui, sans-serif; }
#map { position: absolute; inset: 0; }
#panel {
  position: absolute; top: 12px; left: 12px; z-index: 1;
  background: white; padding: 12px 16px; border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3); max-width: 280px;
}
#panel h1 { font-size: 16px; margin: 0 0 4px; }
.subtitle { font-size: 12px; color: #555; margin: 0 0 8px; }
#layer-toggles { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
#overlay-link { display: block; margin-top: 10px; font-size: 13px; color: #2563eb; }
#attribution { font-size: 11px; color: #555; margin-top: 8px; }