.container {

  display: grid;

  grid-template-columns: 1fr 1fr;

  grid-template-rows: auto auto;    

  gap: 10px;

  grid-template-areas: 

    "first first"

    "second     second";

}

​

.first {

  grid-area: first;

}

​

.second {

  grid-area: second;

}

​

@media screen and (min-width: 25em) {

  .container {

    grid-template-areas: 

      "first first"

      ". second";

  }

}

​

@media screen and (min-width: 37.5em) {

  .container {

    grid-template-areas: 

      "first second"

      "first second";

  }

}

​

​

/* ETC (Formatting only): */

​

body {

  margin: 1.5em;

  font-size: 130%;

  font-family: sans-serif;

  background: #F2F0EC;

  color: #2E2C08;

}

​

.container {

  border: 10px solid #2E2C08;

  background: white;  

  padding: 1em;

}

​

.column {

  padding: 0.5em;

  text-align: center;

  color: white;

  background: #2E2C08;  

  font-weight: bold;

  margin-top: 0;

  margin-bottom: 0;

  text-align: center;

}