<div class="container">
  <div class="header">
    This is Header
  </div>
  <div class="content">
    This is Content
  </div>
  <div class="footer">
    This is Footer
  </div>
</div>
.header {
  font-size: 30px;
  color: blue;
}

.content {
  font-size: 30px;
  color: blue;
}

.footer {
  font-size: 30px;
  color: blue;
}
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