.pad {
    padding: 0 0.5cm;
    line-height: 1.5rem;
    white-space: nowrap;
}

.blue {
    background: lightblue;
    border: 1px solid blue;
    color: black;
    height: 100%;
}

.red {
    background: lightcoral;
    border: 1px solid red;
    color: black;
    height: 100%;
}

.purple {
    background: plum;
    border: 1px solid purple;
    color: black;
    height: 100%;
}

.green {
    background: greenyellow;
    border: 1px solid green;
    color: black;
    height: 100%;
}

.demo {
    border: 1px solid black;
    color: black;
    height: 100%;
}