:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --container-width: 700px;
  }

body {
  font-family: var(--font);
  line-height: 1.5;
  margin: 0;
  }
  
main {
  max-width: var(--container-width);;
  margin: 0 auto;
  }

img {
  display: block;
  margin: 0 auto; 
  max-width: 100;
}