:root {
	color-scheme: light;
	--bg: #eaf8f9;
	--paper: #ffffff;
	--ink: #0a2540;
	--muted: #474747;
	--line: #c9edf2;
	--accent: #f26d0f;
	--accent-dark: #d95c00;
	--accent-soft: #fff3e8;
	--brand-cyan: #3cc4e5;
	--brand-teal: #21a5b1;
	--brand-blue: #0e9bdf;
	--brand-navy: #0a2540;
	--blue-soft: #eaf8f9;
	--green-soft: #eefbf7;
	--red-soft: #fff3ef;
	--shadow: 0 24px 70px rgba(10, 37, 64, 0.14);
	--radius: 22px;
	--mono:
		ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
		monospace;
	--sans:
		Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
		"Segoe UI", sans-serif;
	--serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
}

* {
	box-sizing: border-box;
}
html {
	scroll-behavior: smooth;
}
body {
	margin: 0;
	background:
		radial-gradient(
			circle at top left,
			rgba(60, 196, 229, 0.24),
			transparent 34rem
		),
		radial-gradient(
			circle at top right,
			rgba(242, 109, 15, 0.13),
			transparent 30rem
		),
		linear-gradient(135deg, #ffffff 0%, var(--bg) 48%, #dff5f8 100%);
	color: var(--ink);
	font-family: var(--sans);
	line-height: 1.65;
}
a {
	color: var(--accent-dark);
	text-decoration-thickness: 0.08em;
	text-underline-offset: 0.18em;
}
a:hover {
	color: var(--brand-blue);
}
.skip-link {
	position: fixed;
	left: 1rem;
	top: -5rem;
	z-index: 20;
	background: var(--ink);
	color: white;
	padding: 0.65rem 1rem;
	border-radius: 999px;
}
.skip-link:focus {
	top: 1rem;
}
.mobile-header {
	display: none;
}
.layout {
	display: grid;
	grid-template-columns: minmax(16rem, 21rem) minmax(0, 1fr);
	gap: 2rem;
	max-width: 1480px;
	margin: 0 auto;
	padding: 2rem;
}
.sidebar {
	position: relative;
}
.sidebar-card {
	position: sticky;
	top: 2rem;
	max-height: calc(100vh - 4rem);
	overflow: auto;
	padding: 1.15rem;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	background: rgba(255, 255, 255, 0.9);
	box-shadow: var(--shadow);
	backdrop-filter: blur(14px);
}
.eyebrow {
	margin: 0 0 0.35rem;
	color: var(--accent-dark);
	font-size: 0.74rem;
	font-weight: 800;
	letter-spacing: 0.12em;
	text-transform: uppercase;
}
.nav-home {
	display: inline-flex;
	margin: 0.25rem 0 0.85rem;
	color: var(--ink);
	font-weight: 850;
	text-decoration: none;
}
.sidebar-nav ol {
	list-style: none;
	margin: 0;
	padding: 0;
}
.sidebar-nav li {
	margin: 0.12rem 0;
}
.sidebar-nav a {
	display: block;
	padding: 0.31rem 0.45rem;
	border-radius: 10px;
	color: #0a2540;
	font-size: 0.86rem;
	line-height: 1.3;
	text-decoration: none;
}
.sidebar-nav a:hover {
	background: #eaf8f9;
	color: var(--brand-blue);
}
.toc-level-1 a {
	margin-top: 0.55rem;
	color: var(--brand-navy);
	font-weight: 850;
}
.toc-level-2 a {
	padding-left: 0.8rem;
}
.toc-level-3 a {
	padding-left: 1.55rem;
	font-size: 0.8rem;
	color: #4b667a;
}
.content {
	min-width: 0;
}
.hero,
.plan-doc {
	border: 1px solid var(--line);
	background: rgba(255, 255, 255, 0.96);
	box-shadow: var(--shadow);
}
.hero {
	margin-bottom: 1rem;
	padding: clamp(1.4rem, 3vw, 3rem);
	border-radius: calc(var(--radius) + 8px);
}
.hero h1 {
	max-width: 980px;
	margin: 0;
	font-size: clamp(2.2rem, 5vw, 5.4rem);
	line-height: 0.96;
	letter-spacing: -0.065em;
}
.lede {
	max-width: 820px;
	margin: 1.15rem 0 0;
	color: #334e68;
	font-size: clamp(1.08rem, 2vw, 1.35rem);
}
.hero-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0.8rem;
	margin-top: 1.5rem;
}
.hero-grid div {
	min-width: 0;
	padding: 0.9rem;
	border: 1px solid var(--line);
	border-radius: 16px;
	background: linear-gradient(135deg, #eaf8f9 0%, #ffffff 100%);
}
.hero-grid span {
	display: block;
	color: var(--muted);
	font-size: 0.74rem;
	font-weight: 800;
	text-transform: uppercase;
	letter-spacing: 0.08em;
}
.hero-grid strong {
	display: block;
	overflow-wrap: anywhere;
	font-family: var(--mono);
	font-size: 0.9rem;
}
.plan-doc {
	padding: clamp(1.25rem, 4vw, 4rem);
	border-radius: var(--radius);
}
.plan-doc h1,
.plan-doc h2,
.plan-doc h3,
.plan-doc h4 {
	color: var(--brand-navy);
	line-height: 1.13;
	letter-spacing: -0.025em;
	scroll-margin-top: 2rem;
}
.plan-doc h1 {
	margin-top: 0;
	font-size: 2.4rem;
}
.plan-doc h2 {
	margin-top: 3.2rem;
	padding-top: 1.2rem;
	border-top: 1px solid var(--line);
	font-size: clamp(1.55rem, 3vw, 2.35rem);
}
.plan-doc h3 {
	margin-top: 2.1rem;
	font-size: clamp(1.2rem, 2vw, 1.55rem);
}
.plan-doc h4 {
	margin-top: 1.5rem;
	font-size: 1.05rem;
}
.plan-doc p,
.plan-doc li {
	max-width: 78ch;
}
.plan-doc ul,
.plan-doc ol {
	padding-left: 1.35rem;
}
.plan-doc li + li {
	margin-top: 0.28rem;
}
.plan-doc blockquote,
.plan-doc section:has(> h2[id="goals"]),
.plan-doc section:has(> h2[id="non-goals"]),
.plan-doc section:has(> h2[id="14-risks-and-mitigations"]),
.plan-doc section:has(> h2[id="mvp-implementation-phases"]),
.plan-doc section:has(> h2[id="16-final-recommendation"]) {
	margin: 2rem 0;
	padding: 1rem 1.1rem;
	border: 1px solid var(--line);
	border-left: 5px solid var(--accent);
	border-radius: 18px;
	background: var(--accent-soft);
}
.plan-doc section:has(> h2[id="goals"]) {
	background: var(--green-soft);
	border-left-color: var(--brand-teal);
}
.plan-doc section:has(> h2[id="non-goals"]),
.plan-doc section:has(> h2[id="14-risks-and-mitigations"]) {
	background: var(--red-soft);
	border-left-color: var(--accent);
}
.plan-doc section:has(> h2[id="mvp-implementation-phases"]) {
	background: var(--blue-soft);
	border-left-color: var(--brand-blue);
}
.plan-doc section:has(> h2[id="16-final-recommendation"]) {
	background: #eaf8f9;
	border-left-color: var(--brand-cyan);
}
.plan-doc section:has(> h2[id="goals"]) h2,
.plan-doc section:has(> h2[id="non-goals"]) h2,
.plan-doc section:has(> h2[id="14-risks-and-mitigations"]) h2,
.plan-doc section:has(> h2[id="mvp-implementation-phases"]) h2,
.plan-doc section:has(> h2[id="16-final-recommendation"]) h2 {
	margin-top: 0;
	padding-top: 0;
	border-top: 0;
}
pre {
	max-width: 100%;
	overflow: auto;
	padding: 1rem;
	border: 1px solid #08304f;
	border-radius: 16px;
	background: #0a2540;
	color: #f8fafc;
	line-height: 1.48;
}
code {
	font-family: var(--mono);
	font-size: 0.92em;
}
:not(pre) > code {
	padding: 0.13rem 0.32rem;
	border: 1px solid #ffd4b5;
	border-radius: 7px;
	background: var(--accent-soft);
	color: var(--accent-dark);
}
pre code {
	padding: 0;
	border: 0;
	background: transparent;
	color: inherit;
}
table {
	display: block;
	max-width: 100%;
	overflow-x: auto;
	border-collapse: collapse;
}
th,
td {
	padding: 0.6rem;
	border: 1px solid var(--line);
	text-align: left;
}
th {
	background: #eaf8f9;
}
hr {
	border: 0;
	border-top: 1px solid var(--line);
	margin: 2.5rem 0;
}
@media (max-width: 980px) {
	.mobile-toc {
		display: block;
	}
	.meta-chips {
		gap: 0.4rem;
	}
	.mobile-header {
		position: sticky;
		top: 0;
		z-index: 10;
		display: flex;
		align-items: center;
		justify-content: space-between;
		gap: 1rem;
		padding: 0.75rem 1rem;
		border-bottom: 1px solid var(--line);
		background: rgba(255, 255, 255, 0.96);
		backdrop-filter: blur(14px);
	}
	.mobile-header .eyebrow {
		margin: 0;
		font-size: 0.63rem;
	}
	.layout {
		display: block;
		padding: 1rem;
	}
	.sidebar {
		display: none;
	}
	.hero-grid {
		grid-template-columns: 1fr;
	}
	.plan-doc {
		padding: 1.1rem;
	}
	.plan-doc h2 {
		margin-top: 2.4rem;
	}
}
.reading-progress {
	position: fixed;
	top: 0;
	left: 0;
	z-index: 30;
	width: 100%;
	height: 4px;
	background: transparent;
}
.reading-progress span {
	display: block;
	width: 0;
	height: 100%;
	background: linear-gradient(
		90deg,
		var(--brand-cyan),
		var(--brand-blue),
		var(--accent)
	);
	box-shadow: 0 0 18px rgba(60, 196, 229, 0.55);
}
.sidebar-nav .toc-group {
	border-top: 1px solid rgba(201, 237, 242, 0.78);
	padding: 0.35rem 0;
}
.sidebar-nav .toc-group:first-of-type {
	border-top: 0;
}
.sidebar-nav summary {
	list-style: none;
	cursor: pointer;
}
.sidebar-nav summary::-webkit-details-marker {
	display: none;
}
.sidebar-nav summary {
	display: grid;
	grid-template-columns: 1fr auto;
	align-items: center;
	gap: 0.35rem;
}
.sidebar-nav summary::after {
	content: "▾";
	color: var(--brand-blue);
	font-size: 0.72rem;
	transition: transform 0.18s ease;
}
.sidebar-nav details:not([open]) summary::after {
	transform: rotate(-90deg);
}
.sidebar-nav summary > a {
	font-weight: 850;
}
.sidebar-nav a.is-active {
	background: linear-gradient(90deg, #eaf8f9, #fff3e8);
	color: var(--accent-dark);
	font-weight: 850;
	box-shadow: inset 3px 0 0 var(--accent);
}
.meta-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem;
	margin-top: 1.25rem;
}
.meta-chips span {
	display: inline-flex;
	align-items: center;
	border: 1px solid var(--line);
	border-radius: 999px;
	background: #eaf8f9;
	color: var(--brand-navy);
	font-size: 0.82rem;
	font-weight: 750;
	padding: 0.42rem 0.72rem;
}
.mobile-toc {
	display: none;
	margin-top: 1.1rem;
	border: 1px solid var(--line);
	border-radius: 18px;
	background: #ffffff;
}
.mobile-toc > summary {
	cursor: pointer;
	padding: 0.85rem 1rem;
	color: var(--brand-navy);
	font-weight: 850;
}
.mobile-toc-content {
	max-height: 55vh;
	overflow: auto;
	padding: 0 1rem 1rem;
}
.mobile-toc-content .sidebar-nav .nav-home {
	display: none;
}
.plan-doc section:has(> h2[id="goals"])::before,
.plan-doc section:has(> h2[id="non-goals"])::before,
.plan-doc section:has(> h2[id="14-risks-and-mitigations"])::before,
.plan-doc section:has(> h2[id="mvp-implementation-phases"])::before,
.plan-doc section:has(> h2[id="16-final-recommendation"])::before {
	display: inline-flex;
	margin-bottom: 0.5rem;
	border-radius: 999px;
	background: #ffffff;
	color: var(--accent-dark);
	font-size: 0.72rem;
	font-weight: 850;
	letter-spacing: 0.08em;
	padding: 0.25rem 0.55rem;
	text-transform: uppercase;
}
.plan-doc section:has(> h2[id="goals"])::before {
	content: "Goals";
}
.plan-doc section:has(> h2[id="non-goals"])::before {
	content: "Non-goals";
}
.plan-doc section:has(> h2[id="14-risks-and-mitigations"])::before {
	content: "Risks";
}
.plan-doc section:has(> h2[id="mvp-implementation-phases"])::before {
	content: "MVP scope";
}
.plan-doc section:has(> h2[id="16-final-recommendation"])::before {
	content: "Final recommendation";
}
.heading-anchor {
	margin-left: 0.45rem;
	color: var(--brand-blue);
	font-size: 0.72em;
	opacity: 0;
	text-decoration: none;
	transition: opacity 0.15s ease;
}
.plan-doc h1:hover .heading-anchor,
.plan-doc h2:hover .heading-anchor,
.plan-doc h3:hover .heading-anchor,
.heading-anchor:focus {
	opacity: 1;
}
.heading-anchor[data-copied="true"]::after {
	content: " copied";
	font-family: var(--sans);
	font-size: 0.72rem;
	font-weight: 700;
}
pre::before {
	content: "code";
	display: block;
	margin: -0.2rem 0 0.55rem;
	color: #7ac9d0;
	font-family: var(--sans);
	font-size: 0.68rem;
	font-weight: 850;
	letter-spacing: 0.12em;
	text-transform: uppercase;
}
pre.sourceCode.bash::before {
	content: "bash";
}
pre.sourceCode.json::before,
pre.jsonc::before {
	content: "json";
}
pre.sourceCode.yaml::before {
	content: "yaml";
}
pre.sourceCode.ts::before {
	content: "typescript";
}
pre.sourceCode.md::before {
	content: "markdown";
}
pre.text::before {
	content: "text";
}
pre {
	font-size: 0.88rem;
}
.back-to-top {
	position: fixed;
	right: 1.2rem;
	bottom: 1.2rem;
	z-index: 25;
	width: 2.8rem;
	height: 2.8rem;
	border: 0;
	border-radius: 999px;
	background: var(--accent);
	color: #ffffff;
	box-shadow: 0 16px 36px rgba(10, 37, 64, 0.22);
	font-size: 1.25rem;
	font-weight: 900;
	opacity: 0;
	pointer-events: none;
	transform: translateY(0.5rem);
	transition:
		opacity 0.18s ease,
		transform 0.18s ease;
}
.back-to-top.is-visible {
	opacity: 1;
	pointer-events: auto;
	transform: translateY(0);
}
.back-to-top:hover {
	background: var(--brand-blue);
}
.sidebar-nav a.toc-level-1 {
	margin-top: 0.55rem;
	color: var(--brand-navy);
	font-weight: 850;
}
.sidebar-nav a.toc-level-1.is-active {
	color: var(--accent-dark);
}
.commentable-block {
	position: relative;
}
.commentable-block:hover {
	background: rgba(60, 196, 229, 0.08);
	border-radius: 10px;
}
.commentable-block--active {
	background: rgba(14, 155, 223, 0.14);
	border-radius: 10px;
	box-shadow: inset 0 0 0 1px rgba(14, 155, 223, 0.18);
}
.commentable-block--active .comment-anchor-badge {
	opacity: 1;
	transform: translateX(0);
	background: #dff5fb;
	border-color: var(--brand-blue);
}
.comment-anchor-badge {
	position: absolute;
	top: 0.15rem;
	right: -2.3rem;
	width: 1.8rem;
	height: 1.8rem;
	border: 1px solid var(--line);
	border-radius: 999px;
	background: #ffffff;
	box-shadow: 0 10px 24px rgba(10, 37, 64, 0.12);
	cursor: pointer;
	opacity: 0;
	transform: translateX(0.2rem);
	transition:
		opacity 0.16s ease,
		transform 0.16s ease,
		background 0.16s ease;
}
.commentable-block:hover .comment-anchor-badge,
.comment-anchor-badge.has-comments {
	opacity: 1;
	transform: translateX(0);
}
.comment-anchor-badge.has-comments {
	background: #eaf8f9;
	border-color: var(--brand-blue);
}
.comment-anchor-badge::after {
	content: attr(data-count);
	position: absolute;
	top: -0.35rem;
	right: -0.35rem;
	min-width: 1rem;
	height: 1rem;
	padding: 0 0.18rem;
	border-radius: 999px;
	background: var(--accent);
	color: #ffffff;
	font-size: 0.68rem;
	font-weight: 800;
	line-height: 1rem;
	text-align: center;
	display: none;
}
.comment-anchor-badge.has-comments::after {
	display: block;
}
.selection-comment-menu {
	position: absolute;
	z-index: 40;
	padding: 0.35rem;
	border-radius: 12px;
	background: #0a2540;
	box-shadow: 0 16px 36px rgba(10, 37, 64, 0.28);
}
.selection-comment-menu button {
	border: 0;
	border-radius: 8px;
	background: transparent;
	color: #ffffff;
	font: inherit;
	font-weight: 700;
	cursor: pointer;
	padding: 0.45rem 0.7rem;
}
.comment-drawer {
	position: fixed;
	top: 0;
	right: 0;
	z-index: 35;
	width: min(28rem, 100vw);
	height: 100vh;
	pointer-events: none;
}
.comment-drawer__panel {
	height: 100%;
	padding: 1rem;
	border-left: 1px solid var(--line);
	background: rgba(255, 255, 255, 0.98);
	backdrop-filter: blur(14px);
	box-shadow: -18px 0 48px rgba(10, 37, 64, 0.14);
	transform: translateX(100%);
	transition: transform 0.2s ease;
	overflow: auto;
}
.comment-drawer.is-open {
	pointer-events: auto;
}
.comment-drawer.is-open .comment-drawer__panel {
	transform: translateX(0);
}
.comment-drawer__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
}
.comment-drawer__header h3 {
	margin: 0;
	font-size: 1.1rem;
}
.comment-drawer__header button,
.comment-drawer__form button,
.reply-form button {
	border: 0;
	border-radius: 999px;
	background: var(--accent);
	color: #ffffff;
	font: inherit;
	font-weight: 800;
	cursor: pointer;
	padding: 0.68rem 0.95rem;
}
.comment-drawer__status {
	color: #48657c;
	font-size: 0.9rem;
}
.comment-drawer__form,
.reply-form {
	display: grid;
	gap: 0.65rem;
}
.comment-drawer__form input,
.comment-drawer__form textarea,
.reply-form input,
.reply-form textarea {
	width: 100%;
	padding: 0.8rem 0.88rem;
	border: 1px solid var(--line);
	border-radius: 14px;
	font: inherit;
	resize: vertical;
}
.comment-drawer__threads {
	margin-top: 1rem;
	display: grid;
	gap: 0.9rem;
}
.comment-thread-card {
	padding: 0.95rem;
	border: 1px solid var(--line);
	border-radius: 18px;
	background: #ffffff;
}
.comment-thread-card__quote {
	margin: 0 0 0.8rem;
	padding: 0.7rem 0.85rem;
	border-left: 4px solid var(--brand-blue);
	border-radius: 12px;
	background: #f4fbfd;
	color: #35566d;
}
.comment-entry + .comment-entry {
	margin-top: 0.7rem;
}
.comment-entry--reply {
	margin-left: 1rem;
	padding-left: 0.8rem;
	border-left: 2px solid var(--line);
}
.comment-entry__author {
	display: block;
	margin-bottom: 0.3rem;
	color: var(--brand-navy);
	font-size: 0.92rem;
}
.comment-entry__body {
	margin: 0;
	max-width: none;
}
.comment-entry__meta {
	display: block;
	margin-top: 0.28rem;
	color: #5f7287;
	font-size: 0.8rem;
}
.reply-form {
	margin-top: 0.85rem;
}
.comment-drawer__empty {
	margin: 0;
	color: #5f7287;
}
@media (max-width: 980px) {
	.comment-anchor-badge {
		right: 0.2rem;
	}
	.comment-drawer {
		width: 100vw;
	}
}