nextcloud-server/apps/files/css/detailsView.scss

.app-sidebar .detailFileInfoContainer {
	min-height: 50px;
	padding: 15px;
}

.app-sidebar .detailFileInfoContainer > div {
	clear: both;
}


.app-sidebar .mainFileInfoView .icon {
	display: inline-block;
	background-size: 16px 16px;
}

.app-sidebar .mainFileInfoView .permalink {
	padding: 6px 10px;
	vertical-align: top;
	opacity: .6;

	&:hover,
	&:focus {
		opacity: 1;
	}
}
.app-sidebar .mainFileInfoView .permalink-field>input {
	clear: both;
	width: 90%;
}

.app-sidebar .thumbnailContainer.large {
	margin-left: -15px;
	margin-right: -35px; /* 15 + 20 for the close button */
	margin-top: -15px;
}

.app-sidebar .thumbnailContainer.large.portrait {
	margin: 0; /* if we don't fit the image anyway we give it back the margin */
}

.app-sidebar .large .thumbnail {
	width:100%;
	display:block;
	background-repeat: no-repeat;
	background-position: center;
	background-size: 100%;
	float: none;
	margin: 0;
	height: auto;
}

.app-sidebar .large .thumbnail .stretcher {
	content: '';
	display: block;
	padding-bottom: 56.25%; /* sets height of .thumbnail to 9/16 of the width */
}

.app-sidebar .large.portrait .thumbnail {
	background-position: 50% top;
}

.app-sidebar .large.portrait .thumbnail {
	background-size: contain;
}

.app-sidebar .large.text {
	overflow-y: scroll;
	overflow-x: hidden;
	padding-top: 14px;
	font-size: 80%;
	margin-left: 0;
}

.app-sidebar .thumbnail {
	width: 100%;
	min-height: 75px;
	display: inline-block;
	float: left;
	margin-right: 10px;
	background-size: contain;
	background-repeat: no-repeat;
}

.app-sidebar .ellipsis {
	white-space: nowrap;
	text-overflow: ellipsis;
	overflow: hidden;
}

.app-sidebar .fileName {
	font-size: 16px;
	padding-top: 13px;
	padding-bottom: 3px;
}

.app-sidebar .fileName h3 {
	width: calc(100% - 42px); /* 36px is the with of the copy link icon, but this breaks so we add some more to be sure */
	display: inline-block;
	padding: 5px 0;
	margin: -5px 0;
}

.app-sidebar .file-details {
	color: var(--color-text-maxcontrast);
}

.app-sidebar .action-favorite {
	vertical-align: sub;
	padding: 10px;
	margin: -10px;
}

.app-sidebar .action-favorite > span{
	opacity: .7 !important;
}

.app-sidebar .detailList {
	float: left;
}

.app-sidebar .close {
	position: absolute;
	top: 0;
	right: 0;
	opacity: .5;
	z-index: 1;
	width: 44px;
	height: 44px;
}