style.css

*,
*::after,
*::before{
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

.container{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    gap: 6px;
}

.hover-div{
    display: grid;
    place-items: center;
    width: 430px;
    height: 50px;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.board{
    background-color: rgb(33, 33, 231);
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-template-rows: repeat(6, 1fr);
    place-items: center;
    width: 430px;
    height: 350px;
}

.cell, .hover-cell{
    background-color: white;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
}


.back{
    background-color: rgb(71, 63, 63);
}

.hover-cell{
    border: none;
}

.red:hover, .show-red{
    background-color: rgb(245, 35, 35);
}
.yellow:hover, .show-yellow{
    background-color: rgb(240, 236, 24);
}