Step 2) Add CSS: Use CSS Flexbox to create a responsive layout: Example .row { display: -ms-flexbox; /* IE10 */ display: flex; -ms-flex-wrap: wrap; /* IE10 */ flex-wrap: wrap; margin: 0 -16px; } .col-25 { -ms-flex: 25%; /* IE10 */ flex: 25%; } .col-50 { -ms-flex: 50%; /* IE10 */ flex: 50%; } .col-75 { -ms-flex: 75%; /* IE10 */ flex: 75%; } .col-25, .col-50, .col-75 { padding: 0 16px; } .container { background-color: #f2f2f2; padding: 5px 20px 15px 20px; border: 1px solid lightgrey; border-radius: 3px; } input[type=text] { width: 100%; margin-bottom: 20px; padding: 12px; border: 1px solid #ccc; border-radius: 3px; } label { margin-bottom: 10px; display: block; } .icon-container { margin-bottom: 20px; padding: 7px 0; font-size: 24px; } .btn { background-color: #4CAF50; color: white; padding: 12px; margin: 10px 0; border: none; width: 100%; border-radius: 3px; cursor: pointer; font-size: 17px; } .btn:hover { background-color: #45a049; } span.price { float: right; color: grey; } /* Responsive layout - when the screen is less than 800px wide, make the two columns stack on top of each other instead of next to each other (and change the direction - make the "cart" column go on top) */ @media (max-width: 800px) { .row { flex-direction: column-reverse; } .col-25 { margin-bottom: 20px; } }