/*
 * On-site documentation (/documentation/ hub + /documentation/<chapter>/).
 * Reuses the theme design tokens (--ch-*). Mobile-first; sidebar appears
 * alongside the content from the medium breakpoint up.
 */

/* ── Hub: grouped chapter index ─────────────────────────────────────────── */
.chiseiko-docs-index {
	display: grid;
	gap: var(--ch-space-5);
	margin-top: var(--ch-space-3);
}

.chiseiko-docs-index__title {
	margin: 0 0 var(--ch-space-3);
	font-size: 0.82rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--ch-muted);
}

.chiseiko-docs-index__list {
	display: grid;
	gap: var(--ch-space-2);
	margin: 0;
	padding: 0;
	list-style: none;
}

@media (min-width: 720px) {
	.chiseiko-docs-index__list {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

.chiseiko-docs-index__item a {
	display: grid;
	gap: 0.2rem;
	height: 100%;
	padding: var(--ch-space-3) var(--ch-space-4);
	border: 1px solid var(--ch-line);
	border-radius: var(--ch-radius-md);
	background: var(--ch-surface);
	text-decoration: none;
	transition: border-color var(--ch-motion-fast) var(--ch-ease), box-shadow var(--ch-motion-fast) var(--ch-ease), transform var(--ch-motion-fast) var(--ch-ease);
}

.chiseiko-docs-index__item a:hover {
	border-color: var(--ch-amber);
	box-shadow: var(--ch-shadow-sm);
	transform: translateY(-2px);
}

.chiseiko-docs-index__name {
	font-weight: 650;
	color: var(--ch-ink);
}

.chiseiko-docs-index__desc {
	font-size: 0.9rem;
	color: var(--ch-muted);
}

/* ── Chapter page layout ────────────────────────────────────────────────── */
.chiseiko-docs__breadcrumb {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	align-items: center;
	margin-bottom: var(--ch-space-4);
	font-size: 0.9rem;
	color: var(--ch-muted);
}

.chiseiko-docs__breadcrumb a {
	color: var(--ch-amber-deep);
	text-decoration: none;
}

.chiseiko-docs__breadcrumb a:hover {
	text-decoration: underline;
}

.chiseiko-docs__layout {
	display: grid;
	gap: var(--ch-space-6);
}

@media (min-width: 900px) {
	.chiseiko-docs__layout {
		grid-template-columns: 250px minmax(0, 1fr);
		align-items: start;
	}
}

/* ── Sidebar nav ────────────────────────────────────────────────────────── */
.chiseiko-docs__sidebar {
	min-width: 0;
}

@media (min-width: 900px) {
	.chiseiko-docs__sidebar {
		position: sticky;
		top: var(--ch-space-5);
		max-height: calc(100vh - 2 * var(--ch-space-5));
		overflow-y: auto;
		padding-right: var(--ch-space-2);
	}
}

.chiseiko-docs-nav__title {
	margin: var(--ch-space-4) 0 var(--ch-space-2);
	font-size: 0.76rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--ch-muted);
}

.chiseiko-docs-nav__title:first-child {
	margin-top: 0;
}

.chiseiko-docs-nav__list {
	display: grid;
	gap: 0.1rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.chiseiko-docs-nav__link {
	display: block;
	padding: 0.4rem 0.7rem;
	border-radius: var(--ch-radius-sm);
	font-size: 0.93rem;
	color: var(--ch-ink);
	text-decoration: none;
	transition: background var(--ch-motion-fast) var(--ch-ease), color var(--ch-motion-fast) var(--ch-ease);
}

.chiseiko-docs-nav__link:hover {
	background: var(--ch-surface-strong);
}

.chiseiko-docs-nav__link.is-current {
	background: var(--ch-amber);
	color: #1a1304;
	font-weight: 600;
}

/* ── Chapter content typography ─────────────────────────────────────────── */
.chiseiko-docs__content {
	min-width: 0;
}

.chiseiko-docs__header {
	margin-bottom: var(--ch-space-5);
	padding-bottom: var(--ch-space-4);
	border-bottom: 1px solid var(--ch-line);
}

.chiseiko-docs__title {
	margin: 0.2rem 0 0;
	font-size: clamp(1.8rem, 4vw, 2.4rem);
	line-height: 1.15;
}

.chiseiko-docs__content h2 {
	margin: var(--ch-space-6) 0 var(--ch-space-3);
	font-size: 1.5rem;
	scroll-margin-top: var(--ch-space-5);
}

.chiseiko-docs__content h3 {
	margin: var(--ch-space-5) 0 var(--ch-space-2);
	font-size: 1.2rem;
	scroll-margin-top: var(--ch-space-5);
}

.chiseiko-docs__content h4 {
	margin: var(--ch-space-4) 0 var(--ch-space-2);
	font-size: 1.03rem;
}

.chiseiko-docs__content p,
.chiseiko-docs__content li {
	line-height: 1.7;
}

.chiseiko-docs__content ul,
.chiseiko-docs__content ol {
	padding-left: 1.3rem;
}

.chiseiko-docs__content li + li {
	margin-top: 0.3rem;
}

.chiseiko-docs__content a {
	color: var(--ch-amber-deep);
	text-underline-offset: 2px;
}

.chiseiko-docs__content img {
	display: block;
	width: 100%;
	height: auto;
	margin: var(--ch-space-4) 0;
	border: 1px solid var(--ch-line);
	border-radius: var(--ch-radius-md);
	box-shadow: var(--ch-shadow-sm);
}

.chiseiko-docs__content blockquote {
	margin: var(--ch-space-4) 0;
	padding: var(--ch-space-3) var(--ch-space-4);
	border-left: 3px solid var(--ch-amber);
	border-radius: var(--ch-radius-sm);
	background: var(--ch-surface-strong);
	color: var(--ch-ink);
}

.chiseiko-docs__content blockquote p {
	margin: 0.4rem 0;
}

.chiseiko-docs__content code {
	padding: 0.12em 0.4em;
	border-radius: 4px;
	background: var(--ch-surface-strong);
	font-size: 0.9em;
}

.chiseiko-docs__content pre {
	overflow-x: auto;
	margin: var(--ch-space-4) 0;
	padding: var(--ch-space-4);
	border-radius: var(--ch-radius-md);
	background: #1a1d24;
	color: #e7e9ee;
}

.chiseiko-docs__content pre code {
	padding: 0;
	background: none;
	color: inherit;
}

.chiseiko-docs__content table {
	width: 100%;
	margin: var(--ch-space-4) 0;
	border-collapse: collapse;
	font-size: 0.94rem;
	display: block;
	overflow-x: auto;
}

.chiseiko-docs__content th,
.chiseiko-docs__content td {
	padding: 0.6rem 0.8rem;
	border: 1px solid var(--ch-line);
	text-align: left;
	vertical-align: top;
}

.chiseiko-docs__content thead th {
	background: var(--ch-surface-strong);
}

/* ── Prev / next pager ──────────────────────────────────────────────────── */
.chiseiko-docs__pager {
	display: flex;
	flex-wrap: wrap;
	gap: var(--ch-space-3);
	justify-content: space-between;
	margin-top: var(--ch-space-7);
	padding-top: var(--ch-space-5);
	border-top: 1px solid var(--ch-line);
}

.chiseiko-docs__pager-link {
	display: grid;
	gap: 0.2rem;
	flex: 1 1 220px;
	padding: var(--ch-space-3) var(--ch-space-4);
	border: 1px solid var(--ch-line);
	border-radius: var(--ch-radius-md);
	background: var(--ch-surface);
	text-decoration: none;
	transition: border-color var(--ch-motion-fast) var(--ch-ease), box-shadow var(--ch-motion-fast) var(--ch-ease);
}

.chiseiko-docs__pager-link:hover {
	border-color: var(--ch-amber);
	box-shadow: var(--ch-shadow-sm);
}

.chiseiko-docs__pager-link--next {
	text-align: right;
}

.chiseiko-docs__pager-dir {
	font-size: 0.8rem;
	color: var(--ch-muted);
}

.chiseiko-docs__pager-name {
	font-weight: 600;
	color: var(--ch-ink);
}