main.css

body {
    background-color: black;
    color: white;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18px;
}

.center {
    margin-left:auto; 
    margin-right:auto;
    width: 800px;
}

.left {
    float: left;
}

.right {
    float: right;
}

.button {
    padding: 1em 2em;
    font-weight: bold;
    color:black;
    background-color: lightgrey;
    font-size: 1.5em;
}

.button:hover {
    border: rgb(119, 120, 122) solid 2px;
    cursor: pointer;
}

.red {
    background-color: red;
    border: red solid 2px;
}

.green {
    background-color: green;
    border: green solid 2px;
}

table td {
    padding: 2em;
    border: white solid 2px;
}
table {
    text-align: center;
    border-collapse: collapse;
}

.text-center {
    padding: 2em 9em;
}

#piecesPerBall {
    width: 30px;
}

#text {
    font-size: 4em;
}