wp-calypso/apps/notifications/src/panel/suggestions/styles.scss

$base-background-color: var(--color-surface);
$list-background: var(--color-surface);
$border-color: var(--color-neutral-10);
$light-border-color: var(--color-neutral-0);
$text-color: var(--color-neutral-70);
$name-color: var(--color-neutral-light);
$selected-color: var(--color-primary);
$img-size: 24px;
$img-border-radius: 50%;
$border-radius: 3px;
$box-shadow: 0 5px 6px color-mix(in srgb, var(--color-neutral-10) 50%, transparent);

.wpnc__suggestions {
	position: relative;
	left: 50%;
	transform: translate(-50%, 0);
	margin-top: 5px;
	color: $text-color;
	background: $base-background-color;
	border: 1px solid $border-color;
	border-radius: $border-radius;
	box-shadow: $box-shadow;
	z-index: 20010;
	font-family: $sans;
	width: 90%;

	ul {
		list-style: none;
		padding: 0;
		margin: auto;
		background: $list-background;

		li {
			display: block;
			box-sizing: content-box;
			padding: 8px 10px;
			margin: 0;
			border-bottom: 1px solid $light-border-color;
			cursor: pointer;
			line-height: $img-size;
			font-size: 14px;
			height: $img-size;
			overflow: hidden;
		}
	}

	img {
		border-radius: $img-border-radius;
		width: $img-size;
		height: $img-size;
		float: left;
		margin: 0 10px 0 0;
	}

	strong {
		font-weight: 400;
		background: color-mix(in srgb, var(--color-primary-light) 25%, transparent);
	}

	.wpnc__username {
		float: left;
		display: inline-block;
		font-weight: 400;
		padding: 10px 0;
		margin: -10px 0 0;
	}

	small {
		font-size: 11px;
		font-weight: 400;
		float: right;
		color: $name-color;
		display: inline-block;
	}

	// Currently-selected item (arrows or via search)
	.cur {
		background: $selected-color;
		color: var(--color-text-inverted);

		strong,
		.username strong {
			color: var(--color-text-inverted);
			background: color-mix(in srgb, var(--color-primary-light) 45%, transparent);
		}

		small {
			color: var(--color-text-inverted);
		}
	}
}

.rtl {
	.wpnc__suggestions {
		li {
			direction: ltr; // required to get the '@' on the correct side
		}

		img {
			float: right;
			margin: 0 0 0 10px;
		}

		.wpnc__username {
			float: left;
		}

		&.right {
			img {
				float: left;
				margin: 0 10px 0 0;
			}

			.wpnc__username {
				float: right;
			}
		}
	}
}

@media (max-width: 400px) {
	.wpnc__suggestions {
		width: 100%;
		height: 100%;
	}
}