Adjacent sibling combinator

The adjacent sibling combinator (+) separates two selectors and matches the second element only if it immediately follows the first element, and both are children of the same parent element.

/* Paragraphs that come immediately after any image */
img + p {
  font-weight: bold;
}

former_element + target_element { style properties }

li:first-of-type + li {
  color: red;
}

<ul>
  <li>One</li>
  <li>Two!</li>
  <li>Three</li>
</ul>

• General sibling combinator