style.css

#sp_src {
    width: calc(100% - 84px);
    min-width: calc(100% - 84px);
}

#sp_clear_src, #sp_load_src {
    margin-top: 20px;
    height: 36px;
}

#sp_top_btn_row {
    padding-top: 20px;
}

#sp_clear_src, #sp_load_src {
    flex: none;
    max-width: 42px;
    min-width: 42px !important;
    height: 42px;
    line-height: 1em;
    border-radius: 0.5em;
}

#sp_backup_files {
    max-width: 120px !important;
    padding-top: 5px !important;
    margin-left: 15px;
    margin-right: 15px;
    min-width: 120px !important;
}

#sp_file_options {
    margin-left: 25%;
}

.inc_exc_btn {
    margin-top: 20px !important;
}

#sp_progressbar.hide-container, #sp_progress.hide-container, #sp_error.hide-container {
    min-height: 0;
    display: none;
}

.short_check {
    min-width: 120px !important;
    max-width: 120px !important;
}