@sanity/cli/templates/app-quickstart/src/App.css

Sanity CLI tool for managing Sanity installations, managing plugins, schemas and datasets

/* Container styling for the app */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* Basic reset */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}