/* Vibemon docs theme: near-black canvas, cyan accent (hue 230), mono detailing.
   Restyles mdBook's `navy` (dark, default) and `light` themes to match the brand
   graphics in assets/graphics.src.html; coal/ayu/rust keep stock mdBook styling. */

:root {
	--mono-font: ui-monospace, "SF Mono", SFMono-Regular, Menlo, "JetBrains Mono", Consolas,
		"Liberation Mono", monospace;
	--code-font-size: 0.875em;
	--content-max-width: 820px;
	--vm-radius: 6px;
	--vm-radius-lg: 8px;
}

html {
	font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
		"Helvetica Neue", Arial, sans-serif;
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

/* ---------- palette: navy = product dark ---------- */

.navy {
	--bg: oklch(0.155 0.015 235);
	--fg: oklch(0.88 0.01 235);

	--sidebar-bg: oklch(0.13 0.013 235);
	--sidebar-fg: oklch(0.68 0.014 235);
	--sidebar-non-existant: oklch(0.4 0.014 235);
	--sidebar-active: oklch(0.78 0.13 230);
	--sidebar-spacer: transparent;
	--sidebar-header-border-color: oklch(0.3 0.018 235);

	--scrollbar: oklch(0.34 0.015 235);

	--icons: oklch(0.52 0.015 235);
	--icons-hover: oklch(0.84 0.014 230);

	--links: oklch(0.78 0.13 230);

	--inline-code-color: oklch(0.86 0.045 230);

	--theme-popup-bg: oklch(0.19 0.016 235);
	--theme-popup-border: oklch(0.32 0.018 235);
	--theme-hover: oklch(0.24 0.018 235);

	--quote-bg: oklch(0.19 0.016 235);
	--quote-border: oklch(0.28 0.02 235);

	--table-border-color: oklch(0.26 0.016 235);
	--table-header-bg: oklch(0.21 0.016 235);
	--table-alternate-bg: oklch(0.175 0.015 235);

	--searchbar-border-color: oklch(0.3 0.018 235);
	--searchbar-bg: oklch(0.12 0.012 235);
	--searchbar-fg: oklch(0.88 0.01 235);
	--searchbar-shadow-color: transparent;
	--searchresults-header-fg: oklch(0.6 0.014 235);
	--searchresults-border-color: oklch(0.26 0.016 235);
	--searchresults-li-bg: oklch(0.19 0.016 235);
	--search-mark-bg: oklch(0.78 0.13 230 / 0.32);

	--footnote-highlight: oklch(0.78 0.13 230);
	--overlay-bg: oklch(0.1 0.01 235 / 0.5);

	--blockquote-note-color: oklch(0.78 0.13 230);
	--blockquote-tip-color: oklch(0.8 0.14 165);
	--blockquote-important-color: oklch(0.76 0.12 290);
	--blockquote-warning-color: oklch(0.82 0.14 80);
	--blockquote-caution-color: oklch(0.7 0.17 25);

	/* theme-locals */
	--vm-hairline: oklch(0.92 0.01 235 / 0.09);
	--vm-code-bg: oklch(0.125 0.012 235);
	--vm-raised: oklch(0.18 0.016 235);
	--vm-accent-faint: oklch(0.78 0.13 230 / 0.1);
	--vm-accent-ink: oklch(0.16 0.02 230);
	--vm-muted: oklch(0.66 0.012 235);
}

/* ---------- palette: light, same hue family ---------- */

.light,
html:not(.js) {
	--bg: oklch(0.985 0.002 235);
	--fg: oklch(0.28 0.014 235);

	--sidebar-bg: oklch(0.965 0.004 235);
	--sidebar-fg: oklch(0.44 0.014 235);
	--sidebar-non-existant: oklch(0.72 0.01 235);
	--sidebar-active: oklch(0.5 0.13 235);
	--sidebar-spacer: transparent;
	--sidebar-header-border-color: oklch(0.88 0.01 235);

	--scrollbar: oklch(0.8 0.008 235);

	--icons: oklch(0.6 0.014 235);
	--icons-hover: oklch(0.3 0.016 235);

	--links: oklch(0.5 0.13 235);

	--inline-code-color: oklch(0.4 0.07 235);

	--theme-popup-bg: oklch(0.99 0.002 235);
	--theme-popup-border: oklch(0.88 0.008 235);
	--theme-hover: oklch(0.94 0.006 235);

	--quote-bg: oklch(0.96 0.006 235);
	--quote-border: oklch(0.9 0.01 235);

	--table-border-color: oklch(0.91 0.008 235);
	--table-header-bg: oklch(0.955 0.006 235);
	--table-alternate-bg: oklch(0.975 0.004 235);

	--searchbar-border-color: oklch(0.87 0.01 235);
	--searchbar-bg: oklch(1 0 0);
	--searchbar-fg: oklch(0.28 0.014 235);
	--searchbar-shadow-color: transparent;
	--searchresults-header-fg: oklch(0.55 0.014 235);
	--searchresults-border-color: oklch(0.9 0.008 235);
	--searchresults-li-bg: oklch(0.96 0.006 235);
	--search-mark-bg: oklch(0.5 0.13 235 / 0.22);

	--footnote-highlight: oklch(0.5 0.13 235);
	--overlay-bg: oklch(0.4 0.01 235 / 0.25);

	--blockquote-note-color: oklch(0.5 0.13 235);
	--blockquote-tip-color: oklch(0.52 0.12 160);
	--blockquote-important-color: oklch(0.5 0.15 290);
	--blockquote-warning-color: oklch(0.58 0.13 70);
	--blockquote-caution-color: oklch(0.52 0.18 25);

	--vm-hairline: oklch(0.2 0.02 235 / 0.1);
	--vm-code-bg: oklch(0.965 0.005 235);
	--vm-raised: oklch(0.975 0.004 235);
	--vm-accent-faint: oklch(0.5 0.13 235 / 0.1);
	--vm-accent-ink: oklch(1 0 0);
	--vm-muted: oklch(0.5 0.014 235);
}

/* graceful fallbacks for stock themes (coal/ayu/rust) */
.coal,
.ayu,
.rust {
	--vm-hairline: color-mix(in srgb, var(--fg) 12%, transparent);
	--vm-code-bg: var(--quote-bg);
	--vm-raised: var(--quote-bg);
	--vm-accent-faint: color-mix(in srgb, var(--links) 12%, transparent);
	--vm-accent-ink: var(--bg);
	--vm-muted: color-mix(in srgb, var(--fg) 65%, transparent);
}

::selection {
	background: color-mix(in srgb, var(--links) 30%, transparent);
}

/* ---------- menu bar ---------- */

#menu-bar {
	border-block-end: 1px solid var(--vm-hairline);
}

/* cyan signal line, echoing the README hero */
#menu-bar::before {
	content: "";
	position: absolute;
	inset: 0 auto auto 0;
	width: 100%;
	height: 2px;
	background: linear-gradient(90deg, var(--links) 0, var(--links) 96px, transparent 340px);
	pointer-events: none;
}

#menu-bar.sticky {
	backdrop-filter: blur(10px) saturate(1.2);
	background: color-mix(in srgb, var(--bg) 82%, transparent);
}

.menu-title {
	font-family: var(--mono-font);
	font-size: 1.6rem;
	font-weight: 600;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--fg);
}

/* ---------- sidebar ---------- */

.sidebar {
	border-inline-end: 1px solid var(--vm-hairline);
	font-size: 0.875em;
}

.chapter li.part-title {
	font-family: var(--mono-font);
	font-size: 0.78em;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.12em;
	color: var(--icons);
	margin-block-start: 1.8em;
}

.chapter li.chapter-item {
	margin-block-start: 2px;
	line-height: 1.5;
}

.chapter li.chapter-item > .chapter-link-wrapper > a {
	flex: 1;
	padding: 3px 8px;
	margin-inline-start: -8px;
	border-radius: var(--vm-radius);
	transition: background 0.12s ease, color 0.12s ease;
}

.chapter li.chapter-item > .chapter-link-wrapper > a:hover {
	background: var(--theme-hover);
	color: var(--fg);
	text-decoration: none;
}

.chapter li.chapter-item > .chapter-link-wrapper > a.active {
	background: var(--vm-accent-faint);
	color: var(--sidebar-active);
	font-weight: 500;
}

/* in-page heading list under the active chapter */
.on-this-page {
	margin-inline-start: 4px;
	border-inline-start-width: 1px;
	padding-inline-start: 12px;
	font-size: 0.95em;
}

.chapter li.header-item {
	margin-block: 2px;
}

/* ---------- content typography ---------- */

.content main {
	padding-block-end: 64px;
}

.content h1,
.content h2,
.content h3,
.content h4 {
	font-weight: 650;
	letter-spacing: -0.015em;
	line-height: 1.2;
}

.content h1 {
	font-size: 2.1em;
	letter-spacing: -0.02em;
}

.content h2 {
	font-size: 1.45em;
	border-block-end: 1px solid var(--vm-hairline);
	padding-block-end: 0.35em;
}

.content h3 {
	font-size: 1.15em;
}

.content p,
.content ol,
.content ul {
	line-height: 1.62em;
}

.content a {
	color: var(--links);
	text-underline-offset: 3px;
}

.content a:hover {
	text-decoration: underline;
	text-decoration-color: color-mix(in srgb, var(--links) 55%, transparent);
}

blockquote:not(.blockquote-tag) {
	border-radius: var(--vm-radius);
	border-block-start: none;
	border-block-end: none;
	border-inline-start: 2px solid var(--links);
	padding: 0.6em 1.1em;
}

/* admonitions (`> [!NOTE]` …): tinted panel, thin rule */
.blockquote-tag {
	border-inline-start-width: 2px;
	border-radius: var(--vm-radius);
	padding: 0.7em 1.1em;
	background: color-mix(in srgb, var(--quote-bg) 70%, transparent);
}

.blockquote-tag-title {
	font-family: var(--mono-font);
	font-size: 0.78em;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}

hr {
	border: none;
	border-block-start: 1px solid var(--vm-hairline);
}

/* ---------- code ---------- */

pre {
	line-height: 1.55;
}

pre > code {
	border-radius: var(--vm-radius-lg);
	border: 1px solid var(--vm-hairline);
	padding: 0.9rem 1.1rem;
}

.navy pre > code,
.light pre > code {
	background: var(--vm-code-bg);
}

.navy :not(pre):not(a) > .hljs,
.light :not(pre):not(a) > .hljs {
	background: var(--vm-accent-faint);
	border-radius: 4px;
	padding: 0.1em 0.35em;
}

pre > .result {
	border-radius: var(--vm-radius-lg);
}

/* ---------- tables ---------- */

table {
	border-collapse: collapse;
	border: 1px solid var(--table-border-color);
	font-size: 0.9375em;
}

table thead th {
	font-family: var(--mono-font);
	font-size: 0.75em;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.07em;
	text-align: left;
	color: var(--searchresults-header-fg);
	padding: 8px 16px;
}

table td {
	padding: 7px 16px;
	border-block-end: 1px solid var(--vm-hairline);
	vertical-align: top;
}

table tbody tr:last-child td {
	border-block-end: none;
}

/* keep flag/env columns on one line in reference tables */
table td:first-child > code:only-child {
	white-space: nowrap;
}

/* ---------- landing page (index.md) ---------- */

.vm-hero {
	position: relative;
	margin: 1.5em 0 2.5em;
	padding: 2.4em 2.2em 2.2em;
	border: 1px solid var(--vm-hairline);
	border-radius: var(--vm-radius-lg);
	overflow: hidden;
	background:
		radial-gradient(90% 120% at 95% -20%, color-mix(in srgb, var(--links) 18%, transparent) 0%, transparent 55%),
		linear-gradient(160deg, var(--vm-raised), var(--bg) 70%);
}

.vm-hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background-image: radial-gradient(color-mix(in srgb, var(--fg) 14%, transparent) 1px, transparent 1.5px);
	background-size: 22px 22px;
	-webkit-mask-image: linear-gradient(108deg, #000 0%, transparent 55%);
	mask-image: linear-gradient(108deg, #000 0%, transparent 55%);
	pointer-events: none;
}

.vm-hero > * {
	position: relative;
}

.vm-eyebrow {
	font-family: var(--mono-font);
	font-size: 0.75em;
	font-weight: 600;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--links);
}

.vm-eyebrow::before {
	content: "";
	display: inline-block;
	width: 7px;
	height: 7px;
	margin-inline-end: 10px;
	vertical-align: 1px;
	border-radius: 1px;
	background: var(--links);
	box-shadow: 0 0 8px var(--links);
}

.content .vm-wordmark {
	margin: 0.35em 0 0;
	border: none;
	padding: 0;
	font-size: 3.4em;
	font-weight: 800;
	line-height: 1;
	letter-spacing: -0.045em;
}

.vm-wordmark span {
	color: var(--links);
}

.content .vm-lead {
	max-width: 36em;
	margin: 0.9em 0 0;
	font-size: 1.12em;
	line-height: 1.5;
	color: var(--vm-muted);
}

.vm-lead strong {
	color: var(--fg);
}

.vm-term {
	display: inline-block;
	margin-top: 1.4em;
	padding: 0.7em 1.1em;
	border: 1px solid var(--vm-hairline);
	border-radius: var(--vm-radius);
	background: var(--vm-code-bg);
	font-family: var(--mono-font);
	font-size: 0.875em;
	color: var(--fg);
}

.vm-term b {
	color: var(--links);
	margin-inline-end: 0.6em;
}

.vm-cards {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
	gap: 12px;
	margin: 1.2em 0 2em;
}

.content a.vm-card {
	display: block;
	padding: 1em 1.1em 1.05em;
	border: 1px solid var(--vm-hairline);
	border-radius: var(--vm-radius-lg);
	background: var(--vm-raised);
	color: var(--fg);
	text-decoration: none;
	transition: border-color 0.12s ease, background 0.12s ease;
}

.content a.vm-card:hover {
	border-color: color-mix(in srgb, var(--links) 55%, transparent);
	background: var(--vm-accent-faint);
	text-decoration: none;
}

.vm-card-kicker {
	display: block;
	font-family: var(--mono-font);
	font-size: 0.72em;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--links);
}

.vm-card-title {
	display: block;
	margin-top: 0.3em;
	font-weight: 650;
	font-size: 1.05em;
}

.vm-card-body {
	display: block;
	margin-top: 0.35em;
	font-size: 0.9em;
	line-height: 1.45;
	color: var(--vm-muted);
}

/* ---------- search & chrome ---------- */

#searchbar {
	border-radius: var(--vm-radius);
	padding: 8px 12px;
}

#searchbar:focus,
#searchbar.active {
	outline: none;
	border-color: var(--links);
	box-shadow: 0 0 0 3px color-mix(in srgb, var(--links) 22%, transparent);
}

mark {
	border-radius: 3px;
	padding: 0 2px;
}

.theme-popup {
	border-radius: var(--vm-radius-lg);
	overflow: hidden;
	box-shadow: 0 1px 2px oklch(0 0 0 / 0.2), 0 4px 12px oklch(0 0 0 / 0.25),
		0 16px 40px oklch(0 0 0 / 0.25);
}

:focus-visible {
	outline: 2px solid var(--links);
	outline-offset: 2px;
}

@media print {
	#menu-bar::before,
	.vm-hero::before {
		display: none;
	}
}