#extra_files {
    float: left;
}
ul.extra-files-box {
    list-style-type: none;
    display: flex;
    flex-direction: row;
}
ul.extra-files-box li.preview {
    margin-left: 10px;
    border: thin solid #000000;
}
ul.extra-files-box li.preview:hover {
    border: thin solid #ff0000;
}
ul.extra-files-box li.preview.first {
    margin-left: -40px;
}

#extra_images {
    float: left;
}
ul.extra-images-box {
    list-style-type: none;
    display: flex;
    flex-direction: row;
}
ul.extra-images-box li.preview {
    margin-left: 10px;
    border: thin solid #000000;
}
ul.extra-images-box li.preview:hover {
    border: thin solid #ff0000;
}
ul.extra-images-box li.preview.first {
    margin-left: -40px;
}