/* ferry — one stylesheet for the landing page and the docs.
   Day: chart paper and signal flags. Night: a dark strait and running lights. */

:root {
	--bg: #e8f0ee;
	--bg-deep: #dce8e6;
	--raised: #f8fbfa;
	--ink: #0c2830;
	--ink-soft: #3d5a62;
	--ink-faint: #7a9399;
	--line: #c6d6d3;
	--sea: #bcd8d6;
	--sea-deep: #8fbfbe;
	--wave: #f8fbfa;
	--land: #e9dcc0;
	--land-edge: #c9b48a;
	--accent: #d9411e;        /* international orange */
	--accent-ink: #ffffff;
	--navy: #14365c;
	--flag-yellow: #f2b90f;
	--flag-red: #d63a2f;
	--flag-blue: #1d4f8c;
	--port: #d63a2f;          /* running lights */
	--starboard: #128a5c;
	--term-bg: #0b1f28;
	--term-ink: #d7e6e8;
	--term-dim: #7a9aa2;
	--term-green: #6fdcae;
	--term-blue: #8cc4ff;
	--term-amber: #ffc95c;
	--code-bg: #dbe7e4;
	--radius: 6px;
	--measure: 42rem;
	--sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
	--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
	color-scheme: light;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #06141c;
		--bg-deep: #081a24;
		--raised: #0c222d;
		--ink: #e2eef0;
		--ink-soft: #9db7bd;
		--ink-faint: #5f7d85;
		--line: #183542;
		--sea: #0b2a38;
		--sea-deep: #0e3446;
		--wave: #2d6a7c;
		--land: #13262c;
		--land-edge: #2a4650;
		--accent: #ff6a3d;
		--accent-ink: #06141c;
		--navy: #9cc4f0;
		--flag-yellow: #ffcf4a;
		--flag-red: #ff5a4c;
		--flag-blue: #4f8fe0;
		--port: #ff5a4c;
		--starboard: #3ddc97;
		--term-bg: #030c11;
		--code-bg: #0f2833;
		color-scheme: dark;
	}
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
	margin: 0;
	background: var(--bg);
	color: var(--ink);
	font: 17px/1.6 var(--sans);
	text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

code, pre, kbd { font-family: var(--mono); font-size: 0.88em; }
:not(pre) > code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 3px; }
pre {
	background: var(--code-bg);
	padding: 0.9rem 1.1rem;
	border-radius: var(--radius);
	overflow-x: auto;
	line-height: 1.5;
}

.wrap {
	max-width: 70rem;
	margin: 0 auto;
	padding-left: max(1.25rem, env(safe-area-inset-left));
	padding-right: max(1.25rem, env(safe-area-inset-right));
}

/* Small uppercase labels, like the stencils on a ferry's hull. */
.kicker {
	display: inline-flex;
	align-items: center;
	gap: 0.55rem;
	font: 600 0.72rem/1 var(--mono);
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--ink-faint);
	margin: 0 0 0.9rem;
}
.kicker::before { content: ""; width: 1.6rem; height: 2px; background: var(--accent); }

/* ---- header ---- */

.top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-top: 1.1rem;
	padding-bottom: 1.1rem;
	gap: 1rem;
	flex-wrap: wrap;
}
.mark {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font: 800 1.35rem/1 var(--sans);
	letter-spacing: -0.03em;
	color: var(--ink);
	text-decoration: none;
}
.mark svg { width: 1.9rem; height: 1.9rem; color: var(--navy); }
.mark svg .funnel { fill: var(--accent); }
.top nav { display: flex; gap: 1.25rem; font-size: 0.95rem; flex-wrap: wrap; }
.top nav a { color: var(--ink-soft); text-decoration: none; }
.top nav a:hover { color: var(--ink); }

/* ---- hero ---- */

.hero { padding-top: 3rem; padding-bottom: 1.5rem; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 2.5rem; align-items: center; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; gap: 1rem; } }
.hero h1 {
	font: 800 clamp(2.5rem, 6.4vw, 4.6rem)/0.98 var(--sans);
	letter-spacing: -0.045em;
	margin: 0;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lede { font-size: 1.15rem; color: var(--ink-soft); margin: 0 0 1.4rem; max-width: 30rem; }
.hero > div > :last-child { margin-bottom: 0; }

.copy {
	display: inline-flex;
	align-items: stretch;
	text-align: left;
	background: var(--term-bg);
	color: var(--term-ink);
	border-radius: var(--radius);
	font: 0.95rem/1.4 var(--mono);
	overflow: hidden;
	max-width: 100%;
	box-shadow: 4px 4px 0 var(--accent);
}
.copy code { background: none; padding: 0.85rem 1.1rem; white-space: nowrap; overflow-x: auto; font-size: inherit; }
.copy code::before { content: "$ "; color: var(--term-dim); }
.copy button {
	border: 0;
	background: rgba(255, 255, 255, 0.07);
	color: var(--term-dim);
	font: inherit;
	padding: 0 1rem;
	cursor: pointer;
}
.copy button:hover { color: var(--term-ink); background: rgba(255, 255, 255, 0.14); }

.ctas { margin-top: 1.6rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
	display: inline-block;
	padding: 0.6rem 1.15rem;
	border-radius: var(--radius);
	border: 1.5px solid var(--ink);
	color: var(--ink);
	text-decoration: none;
	font-weight: 600;
	font-size: 0.95rem;
}
.btn.primary { background: var(--ink); color: var(--bg); }
.btn:hover { text-decoration: none; background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* ---- the strait: the signature crossing ---- */

.strait { margin: 1.5rem 0 0; }
.strait svg { display: block; width: 100%; height: auto; overflow: visible; }
.strait .sea { fill: var(--sea); }
.strait .deep { fill: var(--sea-deep); }
.strait .land { fill: var(--land); stroke: var(--land-edge); stroke-width: 1.5; }
.strait .pier { fill: var(--land-edge); }
.strait .wave { fill: none; stroke: var(--wave); stroke-width: 2; stroke-linecap: round; opacity: 0.8; }
.strait .waves { animation: drift 9s linear infinite; }
.strait .waves.slow { animation-duration: 15s; opacity: 0.55; }
@keyframes drift { to { transform: translateX(-120px); } }
.strait .wake { fill: none; stroke: var(--wave); stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 6 9; opacity: 0; transition: opacity 0.4s; }
.strait.moving .wake { opacity: 0.9; }
.strait .hull { fill: var(--navy); }
.strait .cabin { fill: var(--raised); stroke: var(--navy); stroke-width: 2; }
.strait .funnel { fill: var(--accent); }
.strait .cargo { fill: var(--flag-yellow); stroke: var(--navy); stroke-width: 1.5; }
.strait .light-port { fill: var(--port); }
.strait .light-stbd { fill: var(--starboard); }
.strait .mast { stroke: var(--ink-soft); stroke-width: 2; }
.strait .shore-label { fill: var(--ink); font: 700 15px var(--mono); }
.strait .shore-sub { fill: var(--ink-faint); font: 12px var(--mono); }
.strait .hoist text { fill: var(--ink); font: 600 11px var(--mono); }
.strait .hoist .line { stroke: var(--ink-faint); stroke-width: 1; fill: none; }
.strait .hoist { opacity: 0; transition: opacity 0.5s; }
.strait .hoist.up { opacity: 1; }
.strait .crate { opacity: 0; transition: opacity 0.4s; }
.strait .crate.landed { opacity: 1; }
.strait .crate text { fill: var(--navy); font: 700 10px var(--mono); }
.strait .status { fill: var(--ink-soft); font: 600 12px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }
#boat { transition: transform 0.12s linear; }
@media (prefers-reduced-motion: reduce) {
	.strait .waves { animation: none; }
	#boat { transition: none; }
}

/* ---- demo terminals, one on each shore ---- */

.demo { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 0 0 0.5rem; }
@media (max-width: 760px) { .demo { grid-template-columns: 1fr; } }
.term {
	background: var(--term-bg);
	color: var(--term-ink);
	border-radius: var(--radius);
	font: 0.76rem/1.55 var(--mono);
	min-height: 17.5rem;
	overflow: hidden;
	border-top: 3px solid var(--port);
}
.demo .term + .term { border-top-color: var(--starboard); }
.term .bar {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.55rem 0.9rem;
	border-bottom: 1px solid rgba(255, 255, 255, 0.07);
	color: var(--term-dim);
	font-size: 0.75rem;
}
.term .bar i { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--port); display: inline-block; box-shadow: 0 0 8px var(--port); }
.demo .term + .term .bar i { background: var(--starboard); box-shadow: 0 0 8px var(--starboard); }
.term .bar span { letter-spacing: 0.04em; }
.term pre { background: none; margin: 0; padding: 0.8rem 1rem 1rem; white-space: pre-wrap; word-break: break-word; border-radius: 0; font-size: inherit; }
.term .p, .term .d { color: var(--term-dim); }
.term .g { color: var(--term-green); }
.term .b { color: var(--term-blue); }
.term .a { color: var(--term-amber); }
.term .cur { display: inline-block; width: 0.55em; height: 1.1em; vertical-align: -0.2em; background: var(--term-ink); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .term .cur { animation: none; } }

.demo-note { color: var(--ink-faint); font-size: 0.85rem; margin: 0.6rem 0 0; }
.demo-note button { font: inherit; color: var(--accent); background: none; border: 0; cursor: pointer; padding: 0; text-decoration: underline; text-underline-offset: 0.18em; }

/* ---- sections ---- */

section.band { padding: 4.5rem 0; }
section.band.tinted { background: var(--bg-deep); }
section.band h2 { font: 800 clamp(1.8rem, 4vw, 2.6rem)/1.05 var(--sans); margin: 0 0 0.8rem; letter-spacing: -0.035em; }
section.band p.intro { color: var(--ink-soft); max-width: var(--measure); margin: 0 0 2.2rem; font-size: 1.05rem; }

/* The route: four stops on one line, each marked with its numeral pennant. */
.route { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; padding: 0; margin: 0; }
.route::before {
	content: "";
	position: absolute;
	left: 0.9rem; right: 0.9rem; top: 2.05rem;
	border-top: 2px dashed var(--ink-faint);
}
@media (max-width: 860px) {
	.route { grid-template-columns: 1fr; gap: 1.6rem; }
	.route::before { left: 0.95rem; right: auto; top: 0.5rem; bottom: 0.5rem; border-top: 0; border-left: 2px dashed var(--ink-faint); }
	.route li { padding-left: 3rem; }
	.route .pennant { position: absolute; left: 0; top: 0; }
}
.route li { list-style: none; position: relative; }
.route .pennant { display: block; width: 3.2rem; height: 2.2rem; margin-bottom: 1rem; position: relative; background: var(--bg); }
.band.tinted .route .pennant { background: var(--bg-deep); }
.route .pennant svg { width: 100%; height: 100%; display: block; }
.route .pennant .pole { stroke: var(--ink); stroke-width: 2; }
.route .pennant .edge { fill: none; stroke: var(--ink); stroke-width: 1; stroke-opacity: 0.35; }
.route h3 { margin: 0 0 0.35rem; font: 700 1.05rem/1.3 var(--sans); }
.route p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
.f-red { fill: var(--flag-red); } .f-blue { fill: var(--flag-blue); } .f-yellow { fill: var(--flag-yellow); } .f-white { fill: #fbfbf7; }

.diagram { margin: 3rem auto 0; max-width: 56rem; }
.diagram svg { width: 100%; height: auto; display: block; }
.diagram .node { fill: var(--raised); stroke: var(--ink); stroke-width: 1.5; }
.diagram .label { fill: var(--ink); font: 700 13px var(--sans); }
.diagram .sub { fill: var(--ink-faint); font: 12px var(--mono); }
.diagram .meet { stroke: var(--ink-faint); stroke-width: 1.5; stroke-dasharray: 4 5; fill: none; }
.diagram .water { fill: var(--sea); }
.diagram .direct { stroke: var(--accent); stroke-width: 3; fill: none; }
.diagram .flow { stroke: var(--raised); stroke-width: 3; fill: none; stroke-dasharray: 2 14; stroke-linecap: round; animation: flow 1.2s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -16; } }
@media (prefers-reduced-motion: reduce) { .diagram .flow { animation: none; } }
.diagram .tag { fill: var(--accent); font: 700 12px var(--mono); letter-spacing: 0.06em; }
.diagram .lp { fill: var(--port); } .diagram .ls { fill: var(--starboard); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 2rem; } }

table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 600 0.72rem/1.2 var(--mono); color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.12em; border-bottom: 2px solid var(--ink); white-space: nowrap; }
td.num { font: 0.92rem var(--mono); white-space: nowrap; }
td.num.ours { color: var(--ink); font-weight: 700; }
.big { font: 800 3.4rem/1 var(--sans); letter-spacing: -0.04em; color: var(--accent); }
.note { color: var(--ink-faint); font-size: 0.85rem; }

/* The manifest: what the harness checked, stamped. */
.manifest {
	background: var(--raised);
	border: 1.5px solid var(--ink);
	border-radius: var(--radius);
	padding: 0;
	margin: 0;
	position: relative;
}
.manifest header {
	display: flex;
	justify-content: space-between;
	gap: 1rem;
	flex-wrap: wrap;
	padding: 0.7rem 1.1rem;
	border-bottom: 1.5px solid var(--ink);
	font: 600 0.72rem/1.4 var(--mono);
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--ink-soft);
}
.manifest ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; }
@media (max-width: 760px) { .manifest ul { grid-template-columns: 1fr; } }
.manifest li {
	display: grid;
	grid-template-columns: 2rem 1fr;
	gap: 0.2rem 0.6rem;
	padding: 1rem 1.1rem;
	border-bottom: 1px dashed var(--line);
}
.manifest li:nth-child(odd) { border-right: 1px dashed var(--line); }
@media (max-width: 760px) { .manifest li:nth-child(odd) { border-right: 0; } }
.manifest li::before {
	content: "✓";
	grid-row: span 2;
	display: grid;
	place-items: center;
	width: 1.7rem;
	height: 1.7rem;
	border: 2px solid var(--starboard);
	color: var(--starboard);
	border-radius: 50%;
	font: 700 0.85rem/1 var(--sans);
	transform: rotate(-8deg);
}
.manifest strong { display: block; }
.manifest span { color: var(--ink-soft); font-size: 0.95rem; }

/* ---- footer: the far shore ---- */

footer { padding: 2.2rem 0 3rem; color: var(--ink-faint); font-size: 0.9rem; position: relative; }
footer::before {
	content: "";
	display: block;
	height: 14px;
	margin-bottom: 2rem;
	background:
		radial-gradient(circle at 10px -4px, transparent 9px, var(--sea) 10px) 0 0 / 20px 14px repeat-x;
}
footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
footer a { color: var(--ink-soft); }

/* ---- docs ---- */

.docs { display: grid; grid-template-columns: 13.5rem minmax(0, 1fr); gap: 3rem; padding-top: 1.5rem; padding-bottom: 4rem; }
@media (max-width: 820px) { .docs { grid-template-columns: 1fr; gap: 1rem; } }
/* The page list is a route: a dashed line with a stop for each page. */
.docs aside nav { position: sticky; top: 1rem; display: flex; flex-direction: column; font-size: 0.95rem; border-left: 2px dashed var(--line); margin-left: 0.4rem; }
@media (max-width: 820px) { .docs aside nav { position: static; flex-direction: row; flex-wrap: wrap; gap: 0.2rem 1.1rem; border-left: 0; margin-left: 0; } }
.docs aside a { color: var(--ink-soft); text-decoration: none; padding: 0.3rem 0 0.3rem 1.1rem; position: relative; }
.docs aside a::before {
	content: "";
	position: absolute;
	left: -0.42rem; top: 50%;
	width: 0.7rem; height: 0.7rem;
	margin-top: -0.35rem;
	border-radius: 50%;
	background: var(--bg);
	border: 2px solid var(--ink-faint);
}
@media (max-width: 820px) { .docs aside a { padding-left: 0; } .docs aside a::before { display: none; } }
.docs aside a:hover { color: var(--ink); }
.docs aside a.here { color: var(--ink); font-weight: 700; }
.docs aside a.here::before { background: var(--accent); border-color: var(--accent); }
.docs article { max-width: var(--measure); min-width: 0; }
.docs article h1 { font: 800 2.6rem/1.05 var(--sans); letter-spacing: -0.04em; margin: 0.2rem 0 1.3rem; }
.docs article h2 { font: 800 1.45rem/1.25 var(--sans); letter-spacing: -0.02em; margin: 2.6rem 0 0.6rem; }
.docs article h3 { font: 700 1.08rem/1.3 var(--sans); margin: 1.8rem 0 0.4rem; }
.docs article blockquote { margin: 1.2rem 0; padding: 0.2rem 0 0.2rem 1rem; border-left: 3px solid var(--accent); color: var(--ink-soft); }
.docs article table { margin: 1.2rem 0; display: block; overflow-x: auto; }
.docs article li { margin: 0.25rem 0; }
.docs article pre { border-left: 3px solid var(--navy); }
.docs .pager { margin-top: 3rem; padding-top: 1.2rem; border-top: 2px solid var(--ink); display: flex; justify-content: space-between; gap: 1rem; font-size: 0.95rem; }

/* Labels above the strait: the two shores and what is happening between. */
.shores { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; font: 600 0.78rem/1.3 var(--mono); color: var(--ink-soft); margin: 0 0 0.4rem; }
.shores span { display: inline-flex; align-items: center; gap: 0.45rem; }
.shore-l::before, .shore-r::after { content: ""; width: 0.55rem; height: 0.55rem; border-radius: 50%; }
.shore-l::before { background: var(--port); box-shadow: 0 0 8px var(--port); }
.shore-r::after { background: var(--starboard); box-shadow: 0 0 8px var(--starboard); }
.shores .status { color: var(--accent); text-transform: uppercase; letter-spacing: 0.12em; text-align: center; }
@media (max-width: 600px) {
	.shores { font-size: 0.7rem; }
	.shores .status { display: none; }
	.strait .hoist text { display: none; }
}