.upload-area {
    border-color: #dee2e6;
    transition: border-color 0.2s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #0d6efd;
    background-color: #f8f9fa;
}

.preview-container {
    min-height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f8f9fa;
}

.preview-image {
    max-width: 100%;
    max-height: 400px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.filter-section {
    background-color: #ffffff;
}

.filter-section:hover {
    background-color: #f8f9fa;
}

.file-item {
    padding: 8px 12px;
    background-color: #e9ecef;
    border-radius: 4px;
    margin: 4px;
    display: inline-block;
    font-size: 0.9em;
}

#fileList {
    min-height: 40px;
}