/* =========================================================
   WP Manual Theme - Main Stylesheet
   ========================================================= */

/* ---------------------------------------------------------
   CSS Custom Properties
   --------------------------------------------------------- */
:root {
    /* Sidebar (light theme) */
    --sidebar-bg:          #ffffff;
    --sidebar-bg-hover:    #f1f5f9;
    --sidebar-bg-active:   #eff6ff;
    --sidebar-text:        #374151;
    --sidebar-text-muted:  #9ca3af;
    --sidebar-text-active: #111827;
    --sidebar-border:      #e5e7eb;
    --sidebar-width:       280px;

    /* Topbar */
    --topbar-height:    52px;
    --topbar-bg:        #ffffff;
    --topbar-border:    #e5e7eb;

    /* Main area */
    --main-area-bg:     #eef2f7;

    /* Content */
    --content-bg:       #ffffff;
    --content-text:     #1e293b;
    --content-muted:    #64748b;
    --content-border:   #e2e8f0;
    --content-max-w:    820px;

    /* Accent */
    --color-accent-blue: #3b82f6;
    --color-brand:       #3b82f6;
    --color-brand-light: #2563eb;

    /* Typography */
    --font-sans:      'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:      'JetBrains Mono', 'Fira Code', Consolas, monospace;
    --font-size-base: 15px;
    --line-height:    1.7;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition:      200ms ease;
    --transition-slow: 300ms ease;
}

/* ---------------------------------------------------------
   Reset & Base
   --------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--content-bg);
    color: var(--content-text);
    line-height: var(--line-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ---------------------------------------------------------
   Site Wrapper — flex row: sidebar + main
   --------------------------------------------------------- */
.site-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ---------------------------------------------------------
   Left Sidebar
   --------------------------------------------------------- */
.site-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 1000;
    transition: transform var(--transition-slow);
}

/* Branding row */
.site-sidebar__branding {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.site-sidebar__logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
    min-width: 0;
    text-decoration: none;
}

.site-sidebar__logo-icon {
    flex-shrink: 0;
    display: flex;
}

.site-sidebar__title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--sidebar-text-active);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.site-sidebar__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    color: var(--sidebar-text-muted);
    border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
}

.site-sidebar__toggle:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
}

/* Search */
.site-sidebar__search {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.site-sidebar__search-inner {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: #f8fafc;
    border: 1px solid var(--sidebar-border);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    transition: border-color var(--transition);
}

.site-sidebar__search-inner:focus-within {
    border-color: var(--color-accent-blue);
    background: #ffffff;
}

.site-sidebar__search-icon {
    color: var(--sidebar-text-muted);
    flex-shrink: 0;
}

.site-sidebar__search-input {
    background: none;
    border: none;
    outline: none;
    width: 100%;
    font-size: 0.8125rem;
    font-family: inherit;
    color: var(--sidebar-text-active);
}

.site-sidebar__search-input::placeholder {
    color: var(--sidebar-text-muted);
}

/* Nav area (scrollable) */
.site-sidebar__nav-area {
    flex: 1;
    overflow-y: auto;
    padding-bottom: var(--space-4);
    scrollbar-width: thin;
    scrollbar-color: var(--sidebar-border) transparent;
}

.site-sidebar__nav-area::-webkit-scrollbar { width: 4px; }
.site-sidebar__nav-area::-webkit-scrollbar-thumb {
    background: var(--sidebar-border);
    border-radius: 2px;
}

/* Sidebar footer */
.site-sidebar__footer {
    padding: var(--space-4);
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.site-sidebar__copyright {
    font-size: 0.75rem;
    color: var(--sidebar-text-muted);
    line-height: 1.5;
}

.site-sidebar__rights {
    font-size: 0.75rem;
    color: var(--sidebar-text-muted);
}

/* Open button (mobile only) */
.site-sidebar__open-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--sidebar-text);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: background var(--transition);
}

.site-sidebar__open-btn:hover {
    background: var(--sidebar-bg-hover);
}

/* ---------------------------------------------------------
   Sidebar sections (categories / doc tree / links)
   --------------------------------------------------------- */
.sidebar-section {
    padding: var(--space-3) 0 var(--space-2);
}

.sidebar-section + .sidebar-section {
    border-top: 1px solid var(--sidebar-border);
}

.sidebar-section__heading {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding: var(--space-2) var(--space-4) var(--space-3);
}

/* Category list */
.sidebar-cat-list {
    list-style: none;
}

.sidebar-cat-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: 3px var(--space-4) 3px var(--space-3);
}

.sidebar-cat-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--sidebar-text-muted);
    border-radius: 3px;
    transition: background var(--transition), color var(--transition), transform var(--transition);
}

.sidebar-cat-toggle:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
}

.sidebar-cat-toggle[aria-expanded="true"] {
    transform: rotate(90deg);
}

.sidebar-cat-indent {
    width: 20px;
    flex-shrink: 0;
}

.sidebar-cat-link {
    flex: 1;
    font-size: 0.875rem;
    color: var(--sidebar-text);
    text-decoration: none;
    padding: 2px 0;
    transition: color var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-cat-link:hover {
    color: var(--color-accent-blue);
}

.sidebar-cat-count {
    font-size: 0.6875rem;
    color: var(--sidebar-text-muted);
    background: #f1f5f9;
    border-radius: 10px;
    padding: 1px 6px;
    min-width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-cat-children {
    list-style: none;
    padding-left: var(--space-6);
}

.sidebar-cat-children[hidden] { display: none; }

.sidebar-cat-item--child {
    padding-left: var(--space-2);
}

/* Doc section (used on doc pages) */
.sidebar-section--doc .sidebar-doc-header {
    padding: var(--space-2) var(--space-4) var(--space-3);
}

.sidebar-doc-title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--sidebar-text-active);
    text-decoration: none;
    display: block;
    line-height: 1.4;
}

.sidebar-doc-title:hover {
    color: var(--color-accent-blue);
}

/* Primary nav links ("その他") */
.sidebar-links {
    list-style: none;
    padding: 0;
}

.sidebar-links li a {
    display: block;
    font-size: 0.875rem;
    color: var(--sidebar-text);
    padding: 5px var(--space-4);
    text-decoration: none;
    transition: color var(--transition);
}

.sidebar-links li a:hover {
    color: var(--color-accent-blue);
}

/* ---------------------------------------------------------
   Main Area (right of sidebar)
   --------------------------------------------------------- */
.site-main-area {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ---------------------------------------------------------
   Topbar
   --------------------------------------------------------- */
.site-topbar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    height: var(--topbar-height);
    padding: 0 var(--space-6);
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--topbar-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-topbar__tagline {
    flex: 1;
    font-size: 0.875rem;
    color: var(--content-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-nav {
    display: flex;
    gap: 0;
    list-style: none;
}

.topbar-nav li a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    color: var(--content-muted);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.topbar-nav li a:hover {
    color: var(--content-text);
    background: var(--sidebar-bg-hover);
}

/* Open button (mobile only) */
.site-sidebar__open-btn {
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    color: var(--sidebar-text);
    border-radius: var(--radius-sm);
    transition: background var(--transition), opacity var(--transition), visibility var(--transition);
}

.site-sidebar__open-btn:hover {
    background: var(--sidebar-bg-hover);
}

.site-sidebar__open-btn.is-hidden {
    opacity: 0;
    visibility: hidden;
}

/* ---------------------------------------------------------
   Site Content area
   --------------------------------------------------------- */
.site-content {
    flex: 1;
    background: var(--main-area-bg);
    padding: var(--space-8);
}

/* ---------------------------------------------------------
   Sidebar overlay (mobile)
   --------------------------------------------------------- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
}

/* ---------------------------------------------------------
   Front Page — index
   --------------------------------------------------------- */
.front-index {
    min-height: 400px;
}

.front-index__header {
    margin-bottom: var(--space-6);
}

.front-index__tagline {
    font-size: 0.875rem;
    color: var(--content-muted);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.front-index__meta {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
}

.front-index__heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--content-text);
}

.front-index__count {
    font-size: 0.8125rem;
    color: var(--content-muted);
}

/* ---------------------------------------------------------
   Document card grid
   --------------------------------------------------------- */
.doc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

/* Card */
.doc-card {
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border: 1px solid #e6e4e0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    transition: box-shadow var(--transition-slow), transform var(--transition-slow);
}

.doc-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

/* Cover image — portrait aspect ratio (book-like) */
.doc-card__cover {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: #f0ede8;
    position: relative;
}

.doc-card__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 400ms ease;
}

.doc-card:hover .doc-card__cover img {
    transform: scale(1.04);
}

/* Placeholder when no thumbnail */
.doc-card__cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    background: linear-gradient(160deg, #f2efe9 0%, #e8e3db 100%);
    color: #bbb5ac;
    padding: var(--space-6);
}

.doc-card__cover-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: #9e978e;
    text-align: center;
    line-height: 1.4;
    word-break: break-all;
}

/* Card body */
.doc-card__body {
    padding: var(--space-4) var(--space-5) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex: 1;
}

/* Category badge */
.doc-card__cat {
    font-size: 0.6875rem;
    font-weight: 700;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

/* Title */
.doc-card__title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--content-text);
    line-height: 1.45;
}

/* Excerpt */
.doc-card__excerpt {
    font-size: 0.8125rem;
    color: var(--content-muted);
    line-height: 1.65;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Footer row */
.doc-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-1);
    padding-top: var(--space-3);
    border-top: 1px solid #f0ede8;
}

.doc-card__date {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--content-muted);
}

.doc-card__pages {
    font-size: 0.75rem;
    color: var(--content-muted);
}

/* Empty state */
.no-docs {
    text-align: center;
    padding: var(--space-16);
    color: var(--content-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-5);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
    cursor: pointer;
    border: none;
}

.btn--primary {
    background: var(--color-brand);
    color: #ffffff;
    margin-top: var(--space-4);
}

.btn--primary:hover {
    background: var(--color-brand-light);
}

/* ---------------------------------------------------------
   Doc tree nav (used in sidebar on doc pages)
   --------------------------------------------------------- */

/* Nav list */
.nav-list {
    list-style: none;
}

/* Depth 0: top-level chapters */
.nav-depth-0 {
    padding: 0;
}

/* Nav item */
.nav-item {
    position: relative;
}

/* Nav item row (with toggle) */
.nav-item-row {
    display: flex;
    align-items: center;
}

.nav-item-row .nav-link {
    flex: 1;
}

/* Nav link */
.nav-link {
    display: block;
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    color: var(--sidebar-text);
    line-height: 1.4;
    transition: background var(--transition), color var(--transition);
    border-radius: 0;
    position: relative;
}

.nav-depth-0 > .nav-item > .nav-item-row > .nav-link,
.nav-depth-0 > .nav-item > .nav-link {
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: none;
    color: var(--sidebar-text);
    padding: var(--space-2) var(--space-4);
    letter-spacing: 0;
}

.nav-depth-1 > .nav-item > .nav-item-row > .nav-link,
.nav-depth-1 > .nav-item > .nav-link {
    font-weight: 500;
    padding-left: calc(var(--space-4) + 16px);
    font-size: 0.8125rem;
}

.nav-depth-2 > .nav-item > .nav-item-row > .nav-link,
.nav-depth-2 > .nav-item > .nav-link {
    padding-left: calc(var(--space-4) + 32px);
    font-size: 0.8125rem;
    color: var(--sidebar-text-muted);
}

.nav-depth-3 > .nav-item > .nav-item-row > .nav-link,
.nav-depth-3 > .nav-item > .nav-link {
    padding-left: calc(var(--space-4) + 48px);
    font-size: 0.8125rem;
    color: var(--sidebar-text-muted);
}

.nav-link:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
}

/* Active / current state */
.nav-item.is-current > .nav-link,
.nav-item.is-current > .nav-item-row > .nav-link {
    color: var(--sidebar-text-active);
    background: var(--sidebar-bg-active);
    font-weight: 600;
}

.nav-item.is-current > .nav-link::before,
.nav-item.is-current > .nav-item-row > .nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-accent-blue);
    border-radius: 0 2px 2px 0;
}

/* Toggle button */
.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    color: var(--sidebar-text-muted);
    border-radius: var(--radius-sm);
    margin-right: var(--space-2);
    transition: background var(--transition), color var(--transition);
}

.nav-toggle:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
}

.toggle-icon {
    display: block;
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(-45deg);
    transition: transform var(--transition);
    position: relative;
    top: -1px;
}

.nav-toggle[aria-expanded="true"] .toggle-icon {
    transform: rotate(45deg);
    top: -3px;
}

/* Children container */
.nav-children {
    display: none;
    overflow: hidden;
}

.nav-children.is-open {
    display: block;
}

/* Search highlight */
.nav-item.search-hidden {
    display: none;
}

/* ---------------------------------------------------------
   Manual Content (doc article panel)
   --------------------------------------------------------- */
.manual-content {
    background: var(--content-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-10) var(--space-12) var(--space-16);
    max-width: calc(var(--content-max-w) + 2 * var(--space-12));
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    min-height: calc(100vh - var(--topbar-height) - 2 * var(--space-8));
}

/* Breadcrumbs */
.breadcrumbs {
    margin-bottom: var(--space-5);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    list-style: none;
    font-size: 0.8125rem;
    color: var(--content-muted);
}

.breadcrumbs ol li + li::before {
    content: '/';
    margin-right: var(--space-1);
    color: var(--content-border);
}

.breadcrumbs a {
    color: var(--content-muted);
    text-decoration: none;
    transition: color var(--transition);
    display: inline-flex;
    align-items: center;
}

.breadcrumbs a:hover {
    color: var(--color-accent-blue);
}

.breadcrumbs li[aria-current="page"] {
    color: var(--content-text);
    font-weight: 500;
}

/* Article */
.manual-article {
    max-width: var(--content-max-w);
}

.manual-article__header {
    padding-bottom: var(--space-6);
    margin-bottom: var(--space-8);
    border-bottom: 1px solid var(--content-border);
}

.manual-article__level-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-blue);
    background: #eff6ff;
    padding: 2px 12px;
    border-radius: 20px;
    margin-bottom: var(--space-3);
    letter-spacing: 0.02em;
    border: 1px solid #bfdbfe;
}

.manual-article__title {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--content-text);
    margin-bottom: var(--space-3);
}

.manual-article__meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.8125rem;
    color: var(--content-muted);
}

/* ---------------------------------------------------------
   Entry Content (WordPress the_content styles)
   --------------------------------------------------------- */
.entry-content {
    color: var(--content-text);
    line-height: 1.8;
    font-size: 0.9375rem;
}

.entry-content > * + * {
    margin-top: var(--space-5);
}

.entry-content h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: var(--space-10);
    margin-bottom: var(--space-4);
    padding: var(--space-1) 0 var(--space-1) var(--space-4);
    border-left: 4px solid var(--color-accent-blue);
    line-height: 1.4;
    color: var(--content-text);
}

.entry-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
    line-height: 1.3;
}

.entry-content h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
}

.entry-content p {
    line-height: 1.8;
}

.entry-content a {
    color: #4f46e5;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition);
}

.entry-content a:hover {
    color: #3730a3;
}

.entry-content ul,
.entry-content ol {
    padding-left: var(--space-6);
}

.entry-content ul {
    list-style: disc;
}

.entry-content ol {
    list-style: decimal;
}

.entry-content li + li {
    margin-top: var(--space-2);
}

.entry-content blockquote {
    display: flex;
    gap: var(--space-3);
    align-items: flex-start;
    padding: var(--space-4) var(--space-5);
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-md);
    color: var(--content-text);
    font-style: normal;
    line-height: 1.7;
}

.entry-content blockquote::before {
    content: '';
    display: block;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background: var(--color-accent-blue);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3E%3Cpath fill-rule='evenodd' d='M18 10a8 8 0 1 1-16 0 8 8 0 0 1 16 0zm-7-4a1 1 0 1 1-2 0 1 1 0 0 1 2 0zM9 9a1 1 0 0 0 0 2v3a1 1 0 0 0 1 1h1a1 1 0 1 0 0-2v-3a1 1 0 0 0-1-1H9z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-size: 20px;
    margin-top: 1px;
}

.entry-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: #f6f8fa;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--content-border);
    color: #c9254e;
}

.entry-content pre {
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: var(--radius-md);
    padding: var(--space-5);
    overflow-x: auto;
    line-height: 1.6;
}

.entry-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: #e6edf3;
    font-size: 0.875rem;
}

.entry-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.entry-content th,
.entry-content td {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--content-border);
    text-align: left;
}

.entry-content th {
    background: #f6f8fa;
    font-weight: 600;
}

.entry-content tr:nth-child(even) td {
    background: #fafafa;
}

.entry-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--content-border);
}

.entry-content hr {
    border: none;
    border-top: 1px solid var(--content-border);
    margin: var(--space-8) 0;
}

/* Callout / notice blocks */
.entry-content .wp-block-notice,
.entry-content .notice {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin: var(--space-5) 0;
}

/* ---------------------------------------------------------
   Manual TOC (on root page)
   --------------------------------------------------------- */
.manual-toc {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: #f6f8fa;
    border: 1px solid var(--content-border);
    border-radius: var(--radius-lg);
}

.manual-toc__title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--space-5);
    color: var(--content-text);
}

.manual-toc__list {
    list-style: none;
    padding: 0;
}

.manual-toc__chapter {
    padding: var(--space-2) 0;
}

.manual-toc__chapter + .manual-toc__chapter {
    border-top: 1px solid var(--content-border);
}

.manual-toc__link {
    text-decoration: none;
    transition: color var(--transition);
}

.manual-toc__link--chapter {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--content-text);
    display: block;
    padding: var(--space-2) 0;
}

.manual-toc__link--chapter:hover {
    color: #4f46e5;
}

.manual-toc__sections {
    list-style: none;
    padding-left: var(--space-5);
    margin-top: var(--space-1);
}

.manual-toc__sections li {
    padding: var(--space-1) 0;
}

.manual-toc__link--section {
    font-size: 0.875rem;
    color: var(--content-muted);
}

.manual-toc__link--section:hover {
    color: #4f46e5;
}

/* ---------------------------------------------------------
   Prev / Next navigation
   --------------------------------------------------------- */
.manual-page-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid var(--content-border);
    max-width: var(--content-max-w);
}

.manual-page-nav__link {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-4);
    border: 1px solid var(--content-border);
    border-radius: var(--radius-md);
    max-width: 45%;
    transition: border-color var(--transition), background var(--transition);
    text-decoration: none;
}

.manual-page-nav__link:hover {
    border-color: var(--color-accent-blue);
    background: #eff6ff;
}

.manual-page-nav__link--next {
    text-align: right;
    margin-left: auto;
}

.manual-page-nav__label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--content-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.manual-page-nav__title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-accent-blue);
    line-height: 1.4;
}

/* ---------------------------------------------------------
   Responsive
   --------------------------------------------------------- */
@media (max-width: 1024px) {
    .manual-content {
        padding: var(--space-6) var(--space-8) var(--space-12);
    }

    .doc-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    /* Sidebar hides off-screen — triggered by JS */
    .site-sidebar {
        transform: translateX(-100%);
        z-index: 1001;
    }

    .site-sidebar.is-open {
        transform: translateX(0);
    }

    .sidebar-overlay.is-visible {
        display: block;
    }

    /* Main area fills full width */
    .site-main-area {
        margin-left: 0;
    }

    /* Show open button in topbar */
    .site-sidebar__open-btn {
        display: flex;
    }

    /* Topbar: hide long tagline on small screens */
    .site-topbar__tagline {
        display: none;
    }

    /* Content padding */
    .site-content {
        padding: var(--space-4);
    }

    .manual-content {
        padding: var(--space-5) var(--space-5) var(--space-10);
        border-radius: var(--radius-md);
    }

    /* Document grid: 2 columns on mobile */
    .doc-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }

    .manual-page-nav {
        flex-direction: column;
    }

    .manual-page-nav__link {
        max-width: 100%;
    }

    .manual-page-nav__link--next {
        text-align: left;
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .manual-article__title {
        font-size: 1.5rem;
    }

    .doc-card__body {
        padding: var(--space-3) var(--space-3) var(--space-4);
    }

    .doc-card__title {
        font-size: 0.8125rem;
    }

    .doc-card__excerpt {
        display: none;
    }
}

@media (max-width: 360px) {
    .doc-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------------------------------------------------------
   Print
   --------------------------------------------------------- */
@media print {
    .site-header,
    .manual-sidebar,
    .sidebar-open-btn,
    .manual-page-nav {
        display: none !important;
    }

    .manual-content {
        margin-left: 0;
        padding: 0;
    }

    .entry-content pre {
        white-space: pre-wrap;
    }
}

/* ---------------------------------------------------------
   Utility
   --------------------------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}