<style>
* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

/* Style the header */
.header {
  background-color: #f1f1f1;
  padding: 10px;
  text-align: center;
  font-size: 15px;
}

/* Create three equal columns that floats next to each other */
.column {
  float: left;
  width: 30%;
  padding: 10px;
  height: 275px; /* Should be removed. Only for demonstration */
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
  

}

/* Style the footer */
.footer {
  background-color: #f1f1f1;
  padding: 10px;
  text-align: center;
}

/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media (max-width: 600px) {
  .column {
    width: 100%;
  }
}
</style>