nextcloud/apps/files_sharing/css/mobile.css

@media only screen and (max-width: 600px) {


/* hide size and date columns */
table th#headerSize,
table td.filesize,
table th#headerDate,
table td.date {
	display: none;
}

/* restrict length of displayed filename to prevent overflow */
table td.filename .nametext {
	max-width: 80% !important;
}
/* and to make room for download button on hover */
table tr:hover td.filename .nametext,
table tr:focus td.filename .nametext {
	max-width: 60% !important;
}


}