body {
    font-family: Arial, sans-serif;
    text-align: center;
}
.dropdown-container {
    margin-bottom: 20px;
}
select {
    padding: 5px;
    margin: 5px;
    font-size: 16px;
}
#chart {
    width: 80%;
    margin: auto;
}
table {
    width: 80%;
    margin: 20px auto;
    border-collapse: collapse;
}
th, td {
    border: 1px solid black;
    padding: 8px;
}
th {
    background-color: #f4f4f4;
}
.highlight {
    background-color: green;
}