index.html

<!DOCTYPE html>
<html lang="pt-br">
  <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>Dança gatinho</title>
    <link rel="stylesheet" href="./styles.css" />
  </head>

  <body>
    <main>
      <div class="content">
        <div class="loading-heart">
          <span></span>
        </div>
        <h1>Quer namorar comigo?</h1>
        <section>
          <button class="btn btn-yes" onclick="accepted()">Sim</button>
          <button
            class="btn btn-no"
            onclick="declined(this)"
            onmouseover="declined(this)"
          >
            Não
          </button>
        </section>
      </div>
    </main>
    <script src="./index.js"></script>
  </body>
</html>