* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

body {
    color: white;
    padding: 50px ;
    background-color: rgb(42, 91, 219);
    user-select: none;
}

#gameBoard {
    margin-top: 10px;
    width: 430px;
    display: flex;
    flex-flow: row wrap;
    gap: 10px;
}

card  {
    width: 100px;
    height: 100px;
    font-size: 80px;
    line-height: 100px;
    text-align: center;
    border-radius: 8px;
    background-color: rgb(42, 42, 133);
    cursor: pointer;
}

.gray {
    filter: grayscale(75%);
}

time {
    font-size: 20px;
}

button {
    padding: 5px;
}