Wordpress-plugin-Gutenberg-Block/src/block/style.scss

/**
 * #.# Styles
 *
 * CSS for both Frontend+Backend.
 */

.wp-block-cgb-block-mobilizon  {
  margin: 0 auto;
  max-width: 600px;
  padding: 0.5rem 0;
  list-style: none;
  time {
    font-size: 1rem;
  }
  h2 {
    margin: 0.5rem 0;
  }
  li {
    margin-bottom: 2.5rem;
  }
  img {
    width: 100%;
  }
}