h1 {

color: #336; /* Цвет текста */
font-size: 120%; /* Размер шрифта */
}

<!--The content below is only a placeholder and can be replaced.-->
<!-- <ul> -->
<div style="text-align:center">
<meta charset="utf-8">
<div class="row">
 <div>
  <h1 >
    Welcome to {{ title }}
  </h1>
 </div>

<ul>
   <button style="background-color:rgb(177, 19, 19); font-size: 10rem;"
    >click
  on me</button>
     <h2><a target="_blank" rel="noopener" href="https://mbou-
    sosh18.edu95.ru/">Сош №18 </a></h2>

  <li>
     <h2><a target="_blank" rel="noopener" href="https://angular.io/cli">CLI
  Documentation</a></h2>
   </li>
  <li>
  <h2><a target="_blank" rel="noopener"
  href="https://blog.angular.io/">Angular blog</a></h2>
   </li>
   </ul>


   <router-outlet></router-outlet>