/* Center website */
.main {
    max-width: 1000px;
    margin: auto;
}

/* Create three equal columns that floats next to each other */
.column {
    float: left;
    width: 33.33%;
    display: none; /* Hide all elements by default */
}

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

/* Content */
.content {
    background-color: white;
    padding: 10px;
}

/* The "show" class is added to the filtered elements */
.show {
    display: block;
}

/* Style the buttons */
.btn {
    border: none;
    outline: none;
    padding: 12px 16px;
    background-color: white;
    cursor: pointer;
}