9.adjust-the-background-color-property-of-text.html

<style>
  h4 {
    text-align: center;
    padding: 10px;
    background-color: rgba(45, 45, 45, 0.1);
  }
  p {
    text-align: justify;
  }
  .links {
    text-align: left;
    color: black;
  }
  .fullCard {
    width: 245px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin: 10px 5px;
    padding: 4px;
  }
  .cardContent {
    padding: 10px;
  }
  .cardText {
    margin-bottom: 30px;
  }
</style>
<div class="fullCard">
  <div class="cardContent">
    <div class="cardText">
      <h4>Alphabet</h4>
      <hr />
      <p>
        <em
          >Google was founded by Larry Page and Sergey Brin while they were
          <u>Ph.D. students</u> at <strong>Stanford University</strong>.</em
        >
      </p>
    </div>
    <div class="cardLinks">
      <a
        href="https://en.wikipedia.org/wiki/Larry_Page"
        target="_blank"
        class="links"
        >Larry Page</a
      ><br /><br />
      <a
        href="https://en.wikipedia.org/wiki/Sergey_Brin"
        target="_blank"
        class="links"
        >Sergey Brin</a
      >
    </div>
  </div>
</div>