body {
    font-family: sans-serif;
}
h1 {
    text-align: center;
    margin-bottom: 20px;
}
#chart-container {
    width: 80%;
    margin: auto;
}
#controls {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    gap: 20px;
}
#legend-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 20px;
}
.legend-item {
    margin: 5px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
    display: flex;
    align-items: center;
    background-color: #fff;
    text-decoration: none;
}
.item-hidden {
    background-color: #f0f0f0;
    text-decoration: line-through;
}
.legend-color {
    width: 12px;
    height: 12px;
    margin-right: 8px;
    display: inline-block;
}
#download-links {
    text-align: center;
    margin: 20px 0;
}
#download-links a {
    margin: 0 5px;
}
footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
}