/* Page sections: systems groups, work master-detail, background road. */

/* Systems page: groups + section headings */
.group {
	padding: 72px 0 0;
}

.group:first-child {
	padding-top: 24px;
}

.grouph {
	margin: 0 0 10px;
	font-size: 30px;
	font-weight: 700;
	letter-spacing: -0.025em;
	text-transform: none;
	font-family: 'Inter', sans-serif;
	color: var(--ink);
}

.groupnote {
	margin: 0;
	font-size: 16px;
	color: var(--muted);
	max-width: 40em;
}

.wh {
	margin: 0 0 12px;
	font-family: var(--mono);
	font-size: 12px;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--muted);
}

/* Work: master-detail */
.note a {
	color: var(--accent);
	text-decoration: none;
}

.note a:hover {
	text-decoration: underline;
}

.workx {
	position: relative;
	left: 50%;
	transform: translateX(-50%);
	width: min(94vw, 940px);
	display: grid;
	grid-template-columns: 292px 1fr;
	gap: 28px;
	margin-top: 4px;
}

.wlist {
	display: flex;
	flex-direction: column;
	border-left: 1px solid var(--line);
}

.wtab {
	position: relative;
	display: flex;
	align-items: baseline;
	gap: 12px;
	width: 100%;
	padding: 13px 14px;
	background: none;
	border: 0;
	border-left: 2px solid transparent;
	margin-left: -1px;
	color: var(--muted);
	text-align: left;
	font: inherit;
	cursor: pointer;
	transition: color 0.15s, border-color 0.2s, background 0.15s;
}

.wtab em {
	flex: none;
	font-style: normal;
	font-family: var(--mono);
	font-size: 11px;
	opacity: 0.7;
}

.wtab span {
	font-size: 15px;
	font-weight: 500;
	letter-spacing: -0.01em;
	line-height: 1.35;
}

.wtab:hover {
	color: var(--ink);
}

.wtab.on {
	color: var(--ink);
	border-left-color: var(--accent);
	background: var(--panel);
}

.wtab.on em {
	color: var(--accent);
	opacity: 1;
}

.wtab.out {
	display: none;
}

.wpanes {
	position: relative;
	min-height: 210px;
}

.wpane {
	animation: rise 0.28s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.wpane[hidden] {
	display: none;
}

@keyframes rise {
	from {
		opacity: 0;
		transform: translateY(6px);
	}

	to {
		opacity: 1;
		transform: none;
	}
}

.wpane h3 {
	margin: 0 0 10px;
	font-size: 21px;
	letter-spacing: -0.02em;
}

.wpane p {
	margin: 0;
	font-size: 15px;
	color: var(--muted);
	max-width: 46em;
}

.mech {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 7px;
	margin-top: 22px;
	padding-top: 18px;
	border-top: 1px solid var(--line);
}

.mechlab {
	font-family: var(--mono);
	font-size: 10px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--muted);
	margin-right: 4px;
}

.mech a {
	font-family: var(--mono);
	font-size: 12px;
	text-decoration: none;
	color: var(--accent);
	border: 1px solid var(--line);
	border-radius: 999px;
	padding: 5px 13px;
	transition: border-color 0.15s, background 0.15s;
}

.mech a:hover {
	border-color: var(--accent);
	background: color-mix(in srgb, var(--accent) 8%, transparent);
}

/* Background: a commit graph drawn as a road */
.road {
	margin-top: 30px;
}

.rlabels,
.ryears,
.rgemrow {
	position: relative;
}

.rlabels {
	height: 18px;
	margin-bottom: 2px;
}

.rname {
	position: absolute;
	transform: translateX(-50%);
	white-space: nowrap;
	font-size: 13px;
	font-weight: 600;
	letter-spacing: -0.01em;
	color: var(--ink);
}

.rsvg {
	display: block;
	width: 100%;
	height: auto;
	overflow: visible;
}

/* Road build-up: dark casing, coloured surface, dashed centre markings. */
.casing {
	fill: none;
	stroke: var(--ink);
	stroke-width: 21;
	stroke-linecap: round;
	opacity: 0.14;
}

.lane {
	fill: none;
	stroke-width: 14;
	stroke-linecap: butt;
}

.lane.sh {
	color: var(--muted);
	stroke: url(#fadeIn);
	stroke-linecap: round;
}

.lane.hs {
	stroke: var(--sc);
}

.lane.uf {
	stroke: var(--sb);
}

.lane.meta {
	stroke: var(--accent);
	stroke-linecap: round;
}

.lane.gt {
	stroke: var(--sd);
	stroke-linecap: round;
}

.markings {
	fill: none;
	stroke: var(--bg);
	stroke-width: 2.5;
	stroke-dasharray: 11 15;
	stroke-linecap: round;
	opacity: 0.85;
}

/* Commits sit on the road where the path changes. */
.commit {
	fill: var(--bg);
	stroke-width: 3;
}

.commit.hs {
	stroke: var(--sc);
}

.commit.uf {
	stroke: var(--sb);
}

.commit.meta {
	stroke: var(--accent);
}

.commit.gt {
	stroke: var(--sd);
}

.ryears {
	height: 15px;
	margin-top: 2px;
}

.ryear {
	position: absolute;
	transform: translateX(-50%);
	font-family: var(--mono);
	font-size: 10px;
	color: var(--muted);
}

.rgemrow {
	height: 16px;
	margin-top: 2px;
}

.rgemlab {
	position: absolute;
	transform: translateX(-50%);
	white-space: nowrap;
	font-size: 12px;
	font-weight: 600;
	color: var(--sd);
}

.rgemlab em {
	font-style: normal;
	font-family: var(--mono);
	font-size: 10px;
	font-weight: 400;
	opacity: 0.8;
}

.rnote {
	margin: 20px 0 0;
	font-size: 14px;
	color: var(--muted);
}

/* Systems: collapsible sections, one open at a time */
.fold {
	padding: 0;
	border-bottom: 0;
	border-top: 1px solid var(--line);
}

.group + .fold {
	border-top: 0;
}

.fold:last-of-type {
	border-bottom: 1px solid var(--line);
}

.foldhead {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
	width: 100%;
	padding: 18px 0;
	background: none;
	border: 0;
	color: inherit;
	font: inherit;
	text-align: left;
	cursor: pointer;
}

.foldtitle {
	display: block;
}

.foldhead .wh {
	margin: 0 0 4px;
	transition: color 0.15s;
}

.foldhint {
	display: block;
	font-size: 14px;
	line-height: 1.45;
	color: var(--muted);
}

.fold.open .foldhint {
	display: none;
}

.foldhead:hover .wh,
.fold.open .wh {
	color: var(--accent);
}

.foldcaret {
	flex: none;
	width: 9px;
	height: 9px;
	margin-right: 3px;
	border-right: 1.5px solid var(--muted);
	border-bottom: 1.5px solid var(--muted);
	transform: rotate(45deg);
	transition: transform 0.2s;
}

.fold.open .foldcaret {
	transform: rotate(-135deg);
	border-color: var(--accent);
}

.foldbody {
	padding-bottom: 34px;
}

.foldbody[hidden] {
	display: none;
}

.foldbody > .note:first-child {
	margin-top: 0;
}

/* Systems: in-page group links */
.grouplinks {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-top: 20px;
}

.grouplinks a {
	font-family: var(--mono);
	font-size: 12px;
	text-decoration: none;
	color: var(--muted);
	border: 1px solid var(--line);
	border-radius: 999px;
	padding: 6px 14px;
	transition: color 0.15s, border-color 0.15s;
}

.grouplinks a:hover {
	color: var(--accent);
	border-color: var(--accent);
}

section[id],
.group[id] {
	scroll-margin-top: 24px;
}