nextcloud/apps/systemtags/css/settings.css

.systemtag-input {
	display: flex;
	max-width: 500px;
}
#systemtags .select2-container {
	width: 100%;
	max-width: 500px;
}
#systemtag_name {
	flex-grow: 1;
}

#systemtag_delete,
#systemtag_reset,
#systemtag_submit {
	padding: 8px;
}