.map-district-filter { 
    position: absolute; 
    top: 10px; 
    left: 10px; 
    z-index: 1000; 
    background: #ffffff; 
    padding: 10px; 
    border-radius: 4px; 
    box-shadow: 0 1px 4px rgba(0,0,0,0.3); 
    display: flex;
    align-items: center;
    max-width: calc(100% - 60px);
    box-sizing: border-box;
    flex-wrap: wrap;
}

.map-district-filter label { 
    font-weight: bold; 
    margin-right: 10px; 
    margin-bottom: 0; 
    font-size: 14px;
    white-space: nowrap;
}

.map-district-filter select { 
    max-width: 100%;
    flex: 1;
    min-width: 130px;
    display: inline-block; 
    padding: 4px 8px; 
    border: 1px solid #ccc;
    border-radius: 4px; 
    font-size: 14px;
    box-sizing: border-box;
}

@media (max-width: 480px) {
    .map-district-filter label {
        margin-bottom: 5px;
    }
}