function bp_nouveau_theme_cover_image( $params = array() ) {
	if ( empty( $params ) ) {
		return '';
	}

	// Avatar height - padding - 1/2 avatar height.
	$avatar_offset = $params['height'] - 5 - round( (int) bp_core_avatar_full_height() / 2 );

	// Header content offset + spacing.
	$top_offset  = bp_core_avatar_full_height() - 10;
	$left_offset = bp_core_avatar_full_width() + 20;

	$cover_image = isset( $params['cover_image'] ) ? 'background-image: url( ' . $params['cover_image'] . ' );' : '';
	$hide_avatar_style = '';

	// Adjust the cover image header, in case avatars are completely disabled.
	if ( ! buddypress()->avatar->show_avatars ) {
		$hide_avatar_style = '
			#buddypress #item-header-cover-image #item-header-avatar {
				display:  none;
			}
		';

		if ( bp_is_user() ) {
			$hide_avatar_style = '
				#buddypress #item-header-cover-image #item-header-avatar a {
					display: block;
					height: ' . $top_offset . 'px;
					margin: 0 15px 19px 0;
				}

				#buddypress div#item-header #item-header-cover-image #item-header-content {
					margin-left:auto;
				}
			';
		}
	}

	return '
		/* Cover image */
		#buddypress #item-header-cover-image {
			min-height: ' . $params['height'] . 'px;
			margin-bottom: 1em;
		}

		#buddypress #item-header-cover-image:after {
			clear: both;
			content: "";
			display: table;
		}

		#buddypress #header-cover-image {
			height: ' . $params['height'] . 'px;
			' . $cover_image . '
		}

		#buddypress #create-group-form #header-cover-image {
			position: relative;
			margin: 1em 0;
		}

		.bp-user #buddypress #item-header {
			padding-top: 0;
		}

		#buddypress #item-header-cover-image #item-header-avatar {
			margin-top: ' . $avatar_offset . 'px;
			float: left;
			overflow: visible;
			width:auto;
		}

		#buddypress div#item-header #item-header-cover-image #item-header-content {
			clear: both;
			float: left;
			margin-left: ' . $left_offset . 'px;
			margin-top: -' . $top_offset . 'px;
			width:auto;
		}

		body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-header-content,
		body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-actions {
			margin-top: ' . $params['height'] . 'px;
			margin-left: 0;
			clear: none;
			max-width: 50%;
		}

		body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-actions {
			padding-top: 20px;
			max-width: 20%;
		}

		' . $hide_avatar_style . '

		#buddypress div#item-header-cover-image h2 a,
		#buddypress div#item-header-cover-image h2 {
			color: #FFF;
			text-rendering: optimizelegibility;
			text-shadow: 0px 0px 3px rgba( 0, 0, 0, 0.8 );
			margin: 0 0 .6em;
			font-size:200%;
		}

		#buddypress #item-header-cover-image #item-header-avatar img.avatar {
			border: solid 2px #FFF;
			background: rgba( 255, 255, 255, 0.8 );
		}

		#buddypress #item-header-cover-image #item-header-avatar a {
			border: none;
			text-decoration: none;
		}

		#buddypress #item-header-cover-image #item-buttons {
			margin: 0 0 10px;
			padding: 0 0 5px;
		}

		#buddypress #item-header-cover-image #item-buttons:after {
			clear: both;
			content: "";
			display: table;
		}

		@media screen and (max-width: 782px) {
			#buddypress #item-header-cover-image #item-header-avatar,
			.bp-user #buddypress #item-header #item-header-cover-image #item-header-avatar,
			#buddypress div#item-header #item-header-cover-image #item-header-content {
				width:100%;
				text-align:center;
			}

			#buddypress #item-header-cover-image #item-header-avatar a {
				display:inline-block;
			}

			#buddypress #item-header-cover-image #item-header-avatar img {
				margin:0;
			}

			#buddypress div#item-header #item-header-cover-image #item-header-content,
			body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-header-content,
			body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-actions {
				margin:0;
			}

			body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-header-content,
			body.single-item.groups #buddypress div#item-header #item-header-cover-image #item-actions {
				max-width: 100%;
			}

			#buddypress div#item-header-cover-image h2 a,
			#buddypress div#item-header-cover-image h2 {
				color: inherit;
				text-shadow: none;
				margin:25px 0 0;
				font-size:200%;
			}

			#buddypress #item-header-cover-image #item-buttons div {
				float:none;
				display:inline-block;
			}

			#buddypress #item-header-cover-image #item-buttons:before {
				content:"";
			}

			#buddypress #item-header-cover-image #item-buttons {
				margin: 5px 0;
			}
		}
	';
}