iframe {
    width: inherit;
}

.column {
    font-family: Arial, Helvetica, sans-serif;
    letter-spacing: 2px;
    float: left;
    width: 20%;
    padding: 5px;
    text-align: center;
    font-size: 15px;
    cursor: pointer;
    color: white;
    margin: 0 20px;
    border-radius: 4px;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.row {
    display: flex;
    justify-content: center;
}

.containerTab {
    padding: 20px;
    color: white;
}

.row:after {
    content: "";
    display: table;
    clear: both;
}