:root {
	--manual-bg: var(--body-bg-start);
	--manual-panel: var(--surface);
	--manual-panel-alt: var(--surface-alt);
	--manual-text: var(--text);
	--manual-text-secondary: var(--text-secondary);
	--manual-muted: var(--text-muted);
	--manual-border: var(--border);
	--manual-primary: var(--primary);
	--manual-primary-soft: rgba(14, 165, 233, 0.12);
	--manual-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family: Inter, "Segoe UI", sans-serif;
	background: linear-gradient(
		180deg,
		var(--body-bg-start),
		var(--body-bg-end)
	);
	color: var(--manual-text);
}

img {
	max-width: 100%;
	display: block;
}

.manual-shell {
	max-width: 100%;
	margin: 0 auto;
	padding: 0 0 48px;
}

.manual-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 16px;
	padding: 15px 32px;
	background: linear-gradient(135deg, var(--accent), var(--accent-light));
	border-bottom: 3px solid var(--accent-dark);
	box-shadow: none;
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 40;
}

.manual-layout {
	display: block;
	margin-top: 118px;
	padding: 0 20px;
}

.brand-block {
	display: flex;
	align-items: center;
	gap: 4px;
}

.manual-brand-logo {
	display: block;
	width:40px;
	margin-bottom: 10px;
	height: auto;
}

.brand-block h1 {
	margin: 0;
	font-size: clamp(1.8rem, 2vw, 2.5rem);
	line-height: 1.1;
	color: rgba(255, 255, 255, 0.82);
	text-transform: uppercase;
}

.manual-top-nav {
	display: flex;
	flex-wrap: wrap;
	justify-content: flex-end;
	gap: 12px;
}

.manual-top-nav a,
.manual-toc a {
	color: rgba(255, 255, 255, 0.8);
	text-decoration: none;
	transition:
		color 0.2s ease,
		background 0.2s ease,
		transform 0.2s ease;
}

.manual-top-nav a {
	padding: 8px 12px;
	border-radius: 10px;
	font-size: 0.82rem;
	font-weight: 600;
	color: rgba(255, 255, 255, 0.82);
}

.manual-top-nav a:hover,
.manual-top-nav a:focus-visible,
.manual-toc a:hover,
.manual-toc a:focus-visible,
.manual-toc a.is-active {
	color: #ffffff;
	background: rgba(255, 255, 255, 0.16);
}

.manual-content {
	display: grid;
	gap: 28px;
	max-width: 1180px;
	margin: 0 auto;
}

.page-section {
	background: var(--manual-panel);
	border: 1px solid var(--manual-border);
	border-radius: 10px;
	padding: 28px;
	box-shadow: var(--manual-shadow);
}

.intro-section {
	background: linear-gradient(180deg, var(--surface-alt), var(--surface));
}

.section-heading {
	display: flex;
	flex-direction: column;
	gap: 4px;
	margin-bottom: 18px;
}

.eyebrow {
	margin: 0;
	font-size: 0.75rem;
	font-weight: 800;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--manual-primary);
}

h2 {
	margin: 0;
	font-size: clamp(1.8rem, 2.2vw, 2.4rem);
	line-height: 1.15;
}

h3 {
	margin: 0 0 12px;
	font-size: 1.08rem;
}

p {
	line-height: 1.7;
	margin: 0 0 1rem;
	color: var(--manual-text);
}

.page-section p,
.page-section li,
.page-section .feature-list li {
	color: var(--manual-text);
}

.overview-grid,
.detail-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 20px;
	margin-top: 20px;
}

.info-panel,
.detail-grid article {
	background: var(--manual-panel-alt);
	border: 1px solid var(--manual-border);
	border-radius: 10px;
	padding: 20px 18px;
}

.info-panel h3,
.detail-grid article h3 {
	font-size: 1.02rem;
	margin-bottom: 12px;
}

.page-grid {
	display: grid;
	grid-template-columns: minmax(0, 1.2fr) minmax(250px, 0.8fr);
	gap: 24px;
	align-items: center;
}

.feature-list,
.detail-grid ul,
.info-panel ul,
.info-panel ol {
	margin: 0;
	padding-left: 18px;
	display: grid;
	gap: 10px;
}

.feature-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 20px;
	margin-top: 22px;
}

.feature-card {
	padding: 20px 18px;
	border: 1px solid var(--manual-border);
	border-radius: 10px;
	background: var(--manual-panel-alt);
}

.feature-card h3 {
	margin-bottom: 10px;
}

.feature-card ul {
	margin: 0 0 16px;
	padding-left: 18px;
	display: grid;
	gap: 8px;
}

.screenshot-placeholder {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 220px;
	padding: 18px;
	border: 1.5px dashed var(--manual-border);
	border-radius: 10px;
	background: linear-gradient(135deg, var(--surface-alt), var(--surface));
	color: var(--manual-muted);
	font-size: 0.9rem;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	text-align: center;
}

.screenshot-placeholder.small {
	min-height: 150px;
	font-size: 0.75rem;
}

.conclusion-section {
	background: linear-gradient(
		135deg,
		var(--primary-dark),
		var(--primary-light)
	);
	color: white;
}

.conclusion-section .eyebrow,
.conclusion-section p,
.conclusion-section h2 {
	color: white;
}

.footer {
	margin-top: 20px;
	padding: 32px 28px 24px;
	border-top: 1px solid var(--manual-border);
	background: linear-gradient(180deg, var(--surface), var(--surface-alt));
	color: var(--text-secondary);
	box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.footer-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 32px;
	align-items: start;
	margin-bottom: 16px;
}

.footer-links,
.footer-contact {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.footer-brand {
	max-width: 420px;
}

.footer-logo {
	margin: 0 0 12px;
	font-size: 1.15rem;
	font-weight: 700;
	color: var(--text);
}

.footer-text {
	margin: 0;
	line-height: 1.75;
	color: var(--text-secondary);
}

.footer-heading {
	margin: 0 0 12px;
	font-size: 0.92rem;
	font-weight: 700;
	color: var(--text);
}

.footer a {
	color: var(--accent);
	text-decoration: none;
	transition: color 0.2s ease;
}

.footer a:hover {
	color: var(--accent-dark);
	text-decoration: underline;
}

.footer-bottom {
	border-top: 1px solid rgba(15, 23, 42, 0.08);
	padding-top: 16px;
	font-size: 0.85rem;
	text-align: center;
	color: var(--text-muted);
}

@media (max-width: 980px) {
	.manual-header,
	.page-grid,
	.overview-grid,
	.detail-grid,
	.footer-grid {
		grid-template-columns: 1fr;
	}

	.manual-header {
		flex-direction: column;
		align-items: flex-start;
	}

	.manual-top-nav {
		justify-content: flex-start;
	}

	.page-section {
		padding: 22px 18px;
	}
}

@media (max-width: 640px) {
	.manual-shell {
		padding-left: 12px;
		padding-right: 12px;
	}

	.manual-header {
		padding: 22px 18px;
	}

	.manual-footer {
		flex-direction: column;
		gap: 6px;
	}
}