@dscodotco/theme-cli/src/utils/shopify/templates/dev-ui.css

A CLI tool for developing Shopify themes

#theme-dev-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: #1a1a1a;
  color: white;
  padding: 10px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
}
/* ... rest of CSS ... */