Merge pull request #22392 from nextcloud/bugfix/noid/dashboard-loadin…

…g-til-moutned

Dashboard polishing

apps/dashboard/css/dashboard.scss

@@ -1,11 +1,39 @@
-// Show Dashboard background image beneath header
-#body-user #header {
-	background-size: cover !important;
-	background-position: center 50% !important;
-	background-repeat: no-repeat !important;
-	background-attachment: fixed !important;
+#header {
+	background: transparent !important;
+	--color-header: rgba(24, 24, 24, 1);
+
+	#body-user.dashboard--dark & {
+		--color-header: rgba(255, 255, 255, 1);
+	}
+
+	// Show gradient below navigation for visibility of icons when scrolled
+	&:before {
+		content: ' ';
+		display: block;
+		position: absolute;
+		background-image: linear-gradient(180deg, var(--color-header) 0%, transparent 100%);
+		width: 100%;
+		height: 70px;
+		top: 0;
+		margin-top: -70px;
+		transition: margin-top var(--animation-slow);
+
+		#body-user.dashboard--scrolled & {
+			margin-top: 0;
+		}
+	}
+
+	// Use flat color instead of gradient for high contrast theme
+	#body-user.theme--highcontrast & {
+		background-color: var(--color-header) !important;
+
+		&:before {
+			display: none;
+		}
+	}
 }
 
+// Move content up so it scrolls below navigation
 #content {
 	padding-top: 0 !important;
 }