JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<body>
  <div class="container">
    <div>
      <div class="header">Hlavicka</div>
      <div class="content">Obsah</div>
    </div>
    <div class="footer">Paticka</div>
  </div>
  
 </body>

CSS

body {
        margin: 0;
        
}

.container {
        width: 1024px;
        margin: 0 auto;  
        display: flex;
        flex-direction: column;
        min-height: 100vh;
        justify-content: space-between;
        background-color: LightYellow;
}

.header {
        background-color: LightGray;
}

.footer {
        background-color: LightGray;
}