server/apps/files/css/mobile.css

@media only screen and (max-width: 768px) {

/* don’t require a minimum width for files table */
#body-user #filestable {
	min-width: initial !important;
}

/* do not show Deleted Files on mobile, not optimized yet and button too long */
#controls #trash {
	display: none;
}

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

/* remove padding to let border bottom fill the whole width*/
table td {
	padding: 0;
}
/* and accordingly fix left margin of file list summary on mobile */
.summary .info {
	margin-left: 55px;
}

/* remove shift for multiselect bar to account for missing navigation */
table.multiselect thead {
	padding-left: 0;
}

/* restrict length of displayed filename to prevent overflow */
table td.filename .nametext {
	width: 100%;
}

/* always show actions on mobile, not only on hover */
#fileList a.action {
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=20)" !important;
	filter: alpha(opacity=20) !important;
	opacity: .2 !important;
	display: inline !important;
}
/* show share action of shared items darker to distinguish from non-shared */
#fileList a.action.permanent {
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=70)" !important;
	filter: alpha(opacity=70) !important;
	opacity: .7 !important;
}
/* do not show Rename or Versions on mobile */
#fileList .action.action-rename,
#fileList .action.action-versions {
	display: none !important;
}
/* some padding for better clickability */
#fileList a.action img {
	padding: 0 6px 0 12px;
}
/* hide text of the actions on mobile */
#fileList a.action span {
	display: none;
}

/* ellipsis on file names */
table td.filename .nametext .innernametext {
	max-width: 50%;
}

/* proper notification area for multi line messages */
#notification-container {
	display: -webkit-box;
	display: -moz-box;
	display: -ms-flexbox;
	display: -webkit-flex;
	display: flex;
}

/* shorten elements for mobile */
#uploadprogressbar {
	width: 50px;
}
}