.structure-outline {
	font-family: monospace;
	font-size: 18px;
	line-height: 1.5;
	margin-top: 20px;

	ul {
		list-style-type: none;
		padding-left: 20px;

		li {
			margin-top: 0;

			span {
				line-height: 1.5;
				display: inline-block;
			}
		}
	}

	.tree-node {
		padding-left: calc(10px + 8px);
		position: relative;
		user-select: none;
		cursor: pointer;

		&::before {
			content: "";
			background: url('data:image/svg+xml;utf8,\
				<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"><polygon fill="%2316323f" points="4,0 1,0 6,5 1,10 4,10 9,5 4,0" /></svg>\
				');
			position: absolute;
			left: 0;
			margin: calc((1.5em - 10px) / 2) auto;
			width: 10px;
			height: 10px;
		}

		&.expanded::before {
			transform: rotate(90deg);
		}
	}

	.tree-leaf {
		margin-left: calc(10px + 8px);
	}

	.nested {
		display: none;
	}

	.active {
		display: block;
	}

	.warn {
		display: inline;
		margin-left: 12px;
		color: var(--color-flamingo);
		font-family: Arial, sans-serif;
		font-size: 12px;
		text-decoration: none;
		font-style: italic;
	}

	a {
		margin-left: 12px;
		color: var(--color-crimson);
		font-size: 12px;
		font-family: Arial, sans-serif;
		position: relative;

		&:hover::after {
			content: "↗";
			margin-left: 4px;
			position: absolute;
		}
	}
}

.subsystem,
.submessage {
	font-family: monospace;
	line-height: 1.5;
	padding: 0 4px;

	&.subsystem {
		color: #ffffff;
		background: var(--color-crimson);
	}

	&.submessage {
		background: var(--color-mustard);
	}
}

.message {
	padding: 0 4px;
	background: var(--color-fog);
}

.field {
	padding-left: 4px;
	color: #8887c0;

	+ span {
		color: #457297;
	}
}