<article>
  <div>
    
  </div>
</article>

article {
  display: grid; 
  grid-template: 1fr 200px 1fr / 1fr 300px 1fr; 
  height: 100vh;
}

div {
  grid-row: 2; 
  grid-column: 2;
  background-color: brown;
  position: relative;
}

div::before {
  content: "";
  position: absolute;
  inset: -5px;
  border: 5px dashed white;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #30353b; 
}