.gus-data-item {
    padding: 15px;
    margin: 10px 0;
    border: 2px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.gus-data-item:hover {
    background-color: #f5f5f5;
    border-color: #999;
}
.gus-data-item.selected {
    background-color: #e8e8e8;
    border-color: #666;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
}