:root {
    --xvld-primary-color: 255, 0, 0;
    --lineheight: 5px;
}

.matrix {
    width: 625px;
    height: 60px;
    background-color: black;
    border: 5px solid black;
}

.led {
    position: relative;
    z-index: 6;
    cursor: pointer;
    display: inline-block;
    margin: 1px;
    margin-bottom: 0px;
    border-radius: 50%;
    background-color: rgb(var(--primary-color, var(--xvld-primary-color, rgb(255, 0, 0))));
}

.off {
    z-index: 5;
    background-color: #222222;
}