.drop-zone {
    border: 2px dashed #007bff;
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    background-color: #f8f9fa;
    transition: all 0.3s ease;
    cursor: pointer;
}
.drop-zone:hover {
    border-color: #0056b3;
    background-color: #e7f1ff;
}
.drop-zone.drag-over {
    border-color: #28a745;
    background-color: #d4edda;
    border-style: solid;
}
.drop-zone-icon {
    font-size: 48px;
    color: #007bff;
    margin-bottom: 15px;
}
.drop-zone-text {
    font-size: 18px;
    font-weight: 500;
    color: #495057;
    margin-bottom: 10px;
}
.drop-zone-filename {
    font-size: 14px;
    color: #28a745;
    font-weight: 500;
    margin-top: 10px;
}