@media (min-width: 768px) {
        .container {
            width: 600px;
        }
}
.example {
        border: none;
        outline: none;
        border-bottom: 2px solid #999;
        padding: 5px 10px;
        width:300px;
}

.example:focus {
        background-color: #f0fff0;
}