body {
    font-family: Arial, sans-serif;
    margin: 20px;
}
table {
    width: 100%;
    border-collapse: collapse;
}
table, th, td {
    border: 1px solid black;
}
th, td {
    padding: 10px;
    text-align: center;
}
th {
    background-color: #f2f2f2;
}
input[type="number"], input[type="checkbox"] {
    transform: scale(1.2);
}
button {
    padding: 10px;
    margin: 10px 5px;
    font-size: 16px;
}
#stats {
    margin-top: 20px;
}
.tab {
    display: none;
}
.active {
    display: block;
}

select {
    margin-bottom: 10px;
    padding: 5px;
    background-color: #f2f2f2;

}