/* Float four columns side by side */
.column {
    float: left;
    width: 25%;
    padding: 0 10px;
}

/* Remove extra left and right margins, due to padding in columns */
.row {margin: 0 -5px;}

/* Clear floats after the columns */
.row:after {
    content: "";
    display: table;
    clear: both;
}

/* Style the counter cards */
.card {
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2); /* this adds the "card" effect */
    padding: 16px;
    text-align: center;
    background-color: #f1f1f1;
}

.card:empty {
    display: none;
}

/* Responsive columns - one column layout (vertical) on small screens */
@media screen and (max-width: 600px) {
    .column {
        width: 100%;
        display: block;
        margin-bottom: 20px;
    }
}