@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

* {
    margin: 0;
    padding: 0;
    font-family: "Poppins", sans-serif;
    ;
    font-weight: 250;
}


body {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

td {
    height: 50px;
    width: 50px;
    font-size: 30px;
    line-height: 49px;
    text-align: center;
}

table,
th,
td {
    border: 1px solid black;
    border-collapse: collapse;
}




td:nth-child(3n) {
    border-right: 3px solid black;
}

tr:nth-child(3n) td {
    border-bottom: 3px solid black;
}

td:first-child {
    border-left: 3px solid black;
}

tr:first-child td {
    border-top: 3px solid black;
}


.cell-active{
    background-color: #03a9f4;
}


.cell-error{
    background-color: red;
}

.cell-grey{
    background-color: #efefef;
}

.mb-20{
    margin-bottom: 20px;
}

.bottom-con{
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
    gap: 10px;
}


@media only screen and (max-width:600px) {
    td{
        height: 30px;
        width: 30px;
        line-height: 29px;
        font-size: 25px;
    }
}