.grid {
    column-gap: 0;
    grid-template-columns: repeat(auto-fit,minmax(0%,1fr));
}

.cell {
    position: relative;
    margin: 0;
    height: 2.6em;
}

.line {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: .8em;
    width: 100%;
    background-color: grey;
    z-index: 0;
}

/* Boule et couleur */

.ball {
    border-radius:50%;
    width: 2.5em;
    height: 2.5em;
    border:2px solid;
    margin-left: auto;
    margin-right: auto;
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.red {
    background-color: #e53935;
    border-color: #e53935;
}

.pink {
    background-color: #d81b60;
    border-color: #d81b60;
}

.purple {
    background-color: #5e35b1;
    border-color: #5e35b1;
}

.indigo {
    background-color: #3949ab;
    border-color: #3949ab;
}

.blue {
    background-color: #039be5;
    border-color: #039be5;
}

.cyan {
    background-color: #00acc1;
    border-color: #00acc1;
}

.green {
    background-color: #43a047;
    border-color: #43a047;
}

.lime {
    background-color: #c0ca33;
    border-color: #c0ca33;
}

.yellow {
    background-color: #fdd835;
    border-color: #fdd835;
}

.amber {
    background-color: #ffb300;
    border-color: #ffb300;
}

.orange {
    background-color: #fb8c00;
    border-color: #fb8c00;
}