:root {
	--paper: #f3efe6;
	--ink: #1d1a16;
	--muted: #5c564c;
	--line: #ddd4c6;
	--mark: #7a2f26;
	--card: #fffdf8;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { background: var(--paper); color-scheme: light; }

body {
	margin: 0;
	color: var(--ink);
	font-family: "Segoe UI", "Helvetica Neue", sans-serif;
	font-size: 1.0625rem;
	line-height: 1.55;
}

body::before {
	content: "";
	display: block;
	height: 6px;
	background: var(--mark);
}

main {
	max-width: 68rem;
	margin: 0 auto;
	padding: 3rem 1.5rem 4.5rem;
}

a { color: var(--mark); }

.kicker {
	margin: 0 0 0.7rem;
	color: var(--mark);
	font-size: 0.8rem;
	font-weight: 650;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

h1 {
	margin: 0;
	max-width: 16em;
	font-family: Palatino, "Palatino Linotype", "Times New Roman", serif;
	font-size: clamp(2.1rem, 4.6vw, 3.15rem);
	font-weight: 500;
	line-height: 1.12;
	letter-spacing: -0.02em;
}

h2 {
	margin: 0 0 0.7rem;
	font-size: 1.2rem;
	font-weight: 650;
	line-height: 1.3;
}

.lead,
.note,
.hint {
	margin: 0.75rem 0 0;
	max-width: 40em;
}

.note,
.hint { color: var(--muted); }

.hint { margin-top: 0.3rem; font-size: 0.95rem; }

.top-links { margin: 1rem 0 0; }

.presets {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin: 1.25rem 0 0;
	padding: 0;
	list-style: none;
}

button,
.presets button {
	padding: 0.45rem 0.75rem;
	color: var(--ink);
	font: inherit;
	text-align: left;
	background: var(--card);
	border: 1px solid var(--line);
	cursor: pointer;
}

button:focus-visible,
a:focus-visible,
.choice:has(input:focus-visible) {
	outline: 2px solid var(--mark);
	outline-offset: 2px;
}

.builder {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 22rem;
	gap: 1.25rem;
	align-items: start;
	margin-top: 1.5rem;
}

.step {
	margin: 0;
	padding: 1.15rem 0;
	border-top: 1px solid var(--line);
}

.step:first-child { border-top: 0; padding-top: 0; }

fieldset {
	margin: 0;
	padding: 0;
	border: 0;
}

legend {
	padding: 0;
	font-weight: 650;
}

.group-label {
	margin: 0.85rem 0 0.35rem;
	color: var(--muted);
	font-size: 0.82rem;
}

.choices { display: grid; gap: 0.45rem; margin-top: 0.7rem; }

.choice,
.locked,
.summary,
.option-row {
	border: 1px solid var(--line);
	background: rgba(255, 255, 255, 0.4);
}

.choice,
.locked { padding: 0.65rem 0.75rem; }

.locked strong { display: block; }

.choice {
	display: flex;
	gap: 0.7rem;
	align-items: flex-start;
	margin: 0;
	cursor: pointer;
}

.choice input { margin-top: 0.28rem; }

.choice strong { display: block; font-weight: 650; }

.choice small {
	display: block;
	color: var(--muted);
	font-size: 0.92rem;
}

.choice:has(input:checked) {
	border-color: var(--mark);
	background: var(--card);
	box-shadow: inset 3px 0 0 var(--mark);
}

.option-row {
	display: grid;
	grid-template-columns: minmax(0, 1fr) auto;
	gap: 0.75rem;
	align-items: center;
	padding-right: 0.75rem;
	background: transparent;
	border: 0;
}

.option-row .choice { width: 100%; }

.why {
	position: relative;
	z-index: 2;
	font-size: 0.95rem;
	white-space: nowrap;
}

.map {
	margin-top: 1.75rem;
	padding-top: 1.4rem;
	border-top: 1px solid var(--line);
}

.flow { margin-top: 1rem; }

.flow-box {
	width: min(100%, 22rem);
	margin: 0 auto;
	padding: 0.55rem 0.75rem 0.65rem;
	text-align: center;
	background: #fffdf8;
	border: 2px solid #1d1a16;
}

.flow-box strong { display: block; margin: 0.05rem 0; }

.flow-box p { margin: 0.25rem 0 0; }

.map-kicker {
	margin: 0;
	color: var(--muted);
	font-size: 0.78rem;
}

.here {
	display: none;
	margin: 0 0 0.3rem;
	color: var(--mark);
	font-size: 0.72rem;
	font-weight: 650;
	letter-spacing: 0.06em;
	text-transform: uppercase;
}

.is-here > .here { display: block; }

.flow-box.is-here {
	border-color: var(--mark);
	box-shadow: 0 0 0 3px rgba(122, 47, 38, 0.12);
}

.flow-end { border-radius: 999px; }

.flow-stop {
	max-width: 16rem;
	padding: 0.45rem 0.7rem;
	text-align: center;
	background: #fffdf8;
	border: 2px solid #1d1a16;
	border-radius: 999px;
}

.flow-stop p { margin: 0.15rem 0 0; }

.waybill-row {
	display: grid;
	grid-template-columns: 1fr minmax(16rem, 22rem) minmax(12rem, 1fr);
	gap: 0.6rem;
	align-items: center;
}

.waybill-row .flow-box { width: 100%; }

.side {
	display: flex;
	gap: 0.45rem;
	align-items: center;
}

.dash {
	width: 1.6rem;
	border-top: 2px dashed #1d1a16;
	flex: none;
}

.stem {
	width: 2px;
	height: 1.35rem;
	margin: 0 auto;
	background: #1d1a16;
	position: relative;
}

.stem.to-box::after,
.fork i::after {
	content: "";
	position: absolute;
	bottom: -8px;
	left: 50%;
	margin-left: -6px;
	border-right: 6px solid transparent;
	border-left: 6px solid transparent;
	border-top: 8px solid #1d1a16;
}

.stem-wrap {
	display: grid;
	grid-template-columns: 1fr 2px 1fr;
	align-items: center;
	column-gap: 0.45rem;
}

.stem-wrap .stem { grid-column: 2; margin: 0; }

.stem-wrap .flow-label { grid-column: 3; }

.flow-label {
	margin: 0;
	color: var(--muted);
	font-size: 0.82rem;
}

.fork { margin-top: -2px; }

.join + .stem,
.join + .stem-wrap { margin-top: -2px; }

.fork,
.join {
	display: grid;
	height: 1.55rem;
	position: relative;
}

.fork-3,
.join-3 { grid-template-columns: repeat(3, 1fr); }

.fork-4,
.join-4 { grid-template-columns: repeat(4, 1fr); }

.fork::before,
.join::before {
	content: "";
	position: absolute;
	height: 2px;
	background: #1d1a16;
}

.fork-3::before,
.join-3::before { left: calc(100% / 6); right: calc(100% / 6); }

.fork-4::before,
.join-4::before { left: calc(100% / 8); right: calc(100% / 8); }

.fork::before { top: 0; }

.join::before { bottom: 0; }

.fork i,
.join i {
	display: block;
	width: 2px;
	height: 100%;
	margin: 0 auto;
	background: #1d1a16;
	position: relative;
}

.flow-3,
.flow-4 {
	display: grid;
	gap: 0.7rem;
}

.flow-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.flow-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.flow-3 .flow-box,
.flow-4 .flow-box { width: auto; margin: 0; }

.sheet { display: none; max-width: 42rem; margin-top: 2rem; scroll-margin-top: 1rem; }

.sheet:target,
.sheet.is-open {
	display: block;
	padding: 1rem 1.1rem;
	background: var(--card);
	border: 1px solid var(--line);
}

.summary {
	position: sticky;
	top: 1rem;
	padding: 1rem 1.05rem 1.1rem;
	background: var(--card);
}

.summary h2 {
	font-family: Palatino, "Palatino Linotype", "Times New Roman", serif;
	font-size: 1.45rem;
	font-weight: 500;
}

.sum-label {
	margin: 0.9rem 0 0.25rem;
	color: var(--muted);
	font-size: 0.82rem;
}

.summary ul {
	margin: 0;
	padding: 0;
	list-style: none;
}

.summary li {
	margin: 0;
	padding: 0.28rem 0;
	border-top: 1px solid var(--line);
}

.article { max-width: 42rem; }

.article h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); }

.article section {
	margin: 0;
	padding: 1rem 0;
	border-top: 1px solid var(--line);
}

.article h2 { font-size: 1.02rem; }

.catalog { margin: 1rem 0 0; padding: 0; list-style: none; }

.catalog li {
	margin: 0;
	padding: 0.7rem 0;
	border-top: 1px solid var(--line);
}

.catalog a { font-weight: 650; }

@media (max-width: 860px) {
	main { padding-top: 2.1rem; }
	.builder,
	.flow-3,
	.flow-4,
	.waybill-row { grid-template-columns: 1fr; }

	.fork,
	.join { display: none; }

	.side { justify-content: center; }
	.summary { position: static; }
	.why { white-space: normal; }
}

@media print {
	html { background: #fff; }
	body::before { display: none; }
	main { max-width: none; padding: 0; }
	.summary { position: static; }
}