body {
    font-family: Arial, sans-serif;
}

.container {
    margin: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table, th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
    width: 100%;
}

th {
    background-color: #f2f2f2;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: #111;
}

.active {
    background-color: #4CAF50;
}

input[type=submit] {
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    cursor: pointer;
    width: 100%;
    font-size: 20px;
}

input[type=submit]:hover {
    background-color: #45a049;
}


input[type=checkbox] {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
}

h3 {
    border: 2px solid;
}

h3:hover {
    color: #4CAF50;
}

table tr, table th, table td{
    flex: 1 0 10%; /* Or the percentage that suits your layout */
    box-sizing: border-box;
}