id-class-selectors.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .f20 {
        font-size: 20px;
      }
      .f18 {
        font-size: 18px;
      }
      section {
        background-color: blueviolet;
      }

      #title1 {
        color: #fff;
        border: 5px solid antiquewhite;
      }

      #title2 {
        border: 5px solid aqua;
        color: #fff;
      }

      .text-white {
        color: #fff;
      }
    </style>
  </head>
  <body>
    <main>
      <section>
        <h1 id="title1" class="text-white f20">Its Going to be</h1>
      </section>
      <section>
        <h2 id="title2" class="text-white f18">Wait for it</h2>
      </section>
      <section>
        <h3 id="title3" class="text-white">Legendary</h3>
      </section>
    </main>
  </body>
</html>