.sidebar {
    display: none;
    flex-direction: column;
    gap: 20px;
}
.panel-smog {
    background-color: white;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.city-list {
    max-height: 300px;
    overflow-y: auto;
}
.city-item {
    padding: 8px;
    margin: 5px 0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}
.city-item:hover {
    background-color: #f5f5f5;
}
.aqi-indicator {
    padding: 5px 10px;
    border-radius: 15px;
    color: white;
    font-weight: bold;
}
.chart-container {
    height: 160px;
}
.legend {
    background-color: white;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.pollutant-info {
    margin-top: 10px;
}
.pollutant-item {
    display: flex;
    justify-content: space-between;
    margin: 5px 0;
    padding: 5px;
    border-bottom: 1px solid #eee;
}