body {
    font-family: Arial, sans-serif;
    margin: 20px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    margin-bottom: 10px;
}

.intro-text {
    margin-bottom: 20px;
    line-height: 1.6;
}

.intro-text a {
    color: #0066cc;
    text-decoration: none;
}

.intro-text a:hover {
    text-decoration: underline;
}

#layout {
    display: flex;
    gap: 20px;
}

#sidebar {
    flex: 0 0 300px;
}

#chart {
    flex: 1;
}

#date-range {
    margin-bottom: 20px;
}

#date-range label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

#date-range select {
    padding: 5px;
    margin-bottom: 10px;
    width: 100%;
}

#checkboxes {
    max-height: 600px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 4px;
}

#checkboxes input[type="checkbox"] {
    margin-right: 5px;
}

#checkboxes > div {
    margin-left: 20px;
    margin-top: 5px;
}

#checkboxes > input {
    font-weight: bold;
    margin-top: 10px;
}