.upload-box {
    border: 2px dashed #6c757d;
    border-radius: 8px;
    padding: 10px 20px;
    cursor: pointer;
    text-align: center;
    color: #6c757d;
    background-color: #f8f9fa;
    flex-grow: 1;
    transition: border-color 0.3s ease;
}

    .upload-box:hover {
        border-color: #28a745;
        background-color: #e9fbe9;
        color: #28a745;
    }

.hidden-input {
    display: none;
}