wp-includes/css/dist/block-editor/default-editor-styles.css

:root{
  --wp-admin-theme-color:#007cba;
  --wp-admin-theme-color--rgb:0, 124, 186;
  --wp-admin-theme-color-darker-10:#006ba1;
  --wp-admin-theme-color-darker-10--rgb:0, 107, 161;
  --wp-admin-theme-color-darker-20:#005a87;
  --wp-admin-theme-color-darker-20--rgb:0, 90, 135;
  --wp-admin-border-width-focus:2px;
  --wp-block-synced-color:#7a00df;
  --wp-block-synced-color--rgb:122, 0, 223;
  --wp-bound-block-color:var(--wp-block-synced-color);
}
@media (min-resolution:192dpi){
  :root{
    --wp-admin-border-width-focus:1.5px;
  }
}
body{
  font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif;
  font-size:18px;
  line-height:1.5;
  --wp--style--block-gap:2em;
}

p{
  line-height:1.8;
}

.editor-post-title__block{
  font-size:2.5em;
  font-weight:800;
  margin-bottom:1em;
  margin-top:2em;
}