body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}
#map {
    width: 100%;
    height: calc(100vh - 60px);
}
#controls {
    padding: 15px;
    background: #f5f5f5;
    border-bottom: 1px solid #ddd;
    display: flex;
    gap: 10px;
    align-items: center;
}
#gridRef {
    padding: 8px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    width: 200px;
}
button {
    padding: 8px 16px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}
button:hover {
    background: #45a049;
}
#locateBtn {
    background: #2196F3;
}
#locateBtn:hover {
    background: #0b7dda;
}