/* ============================================
   Smart Assist Network Engineer Training Text
   style.css - Complete Stylesheet
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Source+Code+Pro:wght@400;500&display=swap');

/* --- CSS Custom Properties (Light Theme) --- */
:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-text: #1a1a2e;
    --color-text-secondary: #64748b;
    --color-heading: #0f172a;
    --color-link: #2563eb;
    --color-link-hover: #1d4ed8;
    --color-border: #e2e8f0;
    --color-sidebar-bg: #f8fafc;
    --color-sidebar-active-bg: #e0e7ff;
    --color-sidebar-active-text: #3730a3;
    --color-sidebar-hover: #f1f5f9;
    --color-code-bg: #f1f5f9;
    --color-code-text: #1e293b;
    --color-code-border: #e2e8f0;
    --color-table-header-bg: #f1f5f9;
    --color-table-stripe: #f8fafc;
    --color-table-border: #e2e8f0;
    --color-blockquote-bg: #f0f9ff;
    --color-blockquote-border: #3b82f6;
    --color-accent: #2563eb;
    --color-accent-light: #dbeafe;
    --color-overlay: rgba(0, 0, 0, 0.5);
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-search-highlight: #fef08a;

    --font-body: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
    --font-code: "Source Code Pro", "Menlo", "Consolas", "Courier New", monospace;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-xs: 0.8125rem;
    --font-size-lg: 1.125rem;
    --line-height-body: 1.8;
    --line-height-code: 1.5;
    --line-height-table: 1.6;

    --sidebar-width: 300px;
    --content-max-width: 860px;
    --content-padding: 2.5rem;
    --mobile-header-height: 56px;
    --border-radius: 6px;
    --transition-speed: 0.25s;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-heading: #f1f5f9;
    --color-link: #60a5fa;
    --color-link-hover: #93bbfd;
    --color-border: #334155;
    --color-sidebar-bg: #1e293b;
    --color-sidebar-active-bg: #312e81;
    --color-sidebar-active-text: #a5b4fc;
    --color-sidebar-hover: #334155;
    --color-code-bg: #1e293b;
    --color-code-text: #e2e8f0;
    --color-code-border: #334155;
    --color-table-header-bg: #1e293b;
    --color-table-stripe: #162032;
    --color-table-border: #334155;
    --color-blockquote-bg: #172554;
    --color-blockquote-border: #3b82f6;
    --color-accent: #60a5fa;
    --color-accent-light: #1e3a5f;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-search-highlight: #854d0e;
}

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

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

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

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--color-link-hover);
}

/* --- Layout --- */
.layout {
    display: flex;
    min-height: 100vh;
}

/* --- Mobile Header --- */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mobile-header-height);
    background: var(--color-sidebar-bg);
    border-bottom: 1px solid var(--color-border);
    align-items: center;
    padding: 0 1rem;
    z-index: 200;
    gap: 0.75rem;
}

.mobile-header .book-title-mobile {
    flex: 1;
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-heading);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-header .header-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-sidebar-bg);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-speed) ease;
}

.sidebar-header {
    padding: 1.5rem 1.25rem 1rem;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.sidebar-header .book-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.sidebar-header .book-subtitle {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.sidebar-controls {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

/* --- Search Box --- */
.search-box {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    outline: none;
    transition: border-color var(--transition-speed);
}

.search-box input:focus {
    border-color: var(--color-accent);
}

.search-box input::placeholder {
    color: var(--color-text-secondary);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 1.25rem;
    right: 1.25rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    max-height: 400px;
    overflow-y: auto;
    box-shadow: 0 4px 12px var(--color-shadow);
    display: none;
    z-index: 300;
}

.search-results.active {
    display: block;
}

.search-result-item {
    display: block;
    padding: 0.625rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    transition: background var(--transition-speed);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--color-sidebar-hover);
}

.search-result-item .result-chapter {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.search-result-item .result-title {
    font-weight: 500;
}

.search-result-item .result-snippet {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
    line-height: 1.5;
}

.search-result-item .result-snippet mark {
    background: var(--color-search-highlight);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

/* --- TOC Navigation --- */
.toc {
    list-style: none;
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.toc-chapter {
    border-bottom: 1px solid var(--color-border);
}

.toc-chapter-header {
    display: flex;
    align-items: center;
}

.toc-chapter-link {
    flex: 1;
    display: block;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: 1.5;
    transition: background var(--transition-speed);
}

.toc-chapter-link:hover {
    background: var(--color-sidebar-hover);
    color: var(--color-text);
}

.toc-chapter.active > .toc-chapter-header > .toc-chapter-link {
    color: var(--color-sidebar-active-text);
    background: var(--color-sidebar-active-bg);
    font-weight: 700;
}

.toc-chapter-link .chapter-number {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.toc-chapter.active > .toc-chapter-header > .toc-chapter-link .chapter-number {
    color: var(--color-sidebar-active-text);
}

.toc-expand {
    padding: 0.625rem 0.75rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    transition: transform var(--transition-speed);
    flex-shrink: 0;
}

.toc-expand::after {
    content: "▸";
    display: inline-block;
    transition: transform var(--transition-speed);
}

.toc-chapter.expanded > .toc-chapter-header > .toc-expand::after {
    transform: rotate(90deg);
}

.toc-sections {
    list-style: none;
    display: none;
    padding-bottom: 0.5rem;
}

.toc-chapter.expanded > .toc-sections {
    display: block;
}

.toc-sections a {
    display: block;
    padding: 0.3125rem 1.25rem 0.3125rem 2.25rem;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: 1.5;
    transition: color var(--transition-speed), background var(--transition-speed);
}

.toc-sections a:hover {
    color: var(--color-text);
    background: var(--color-sidebar-hover);
}

.toc-sections a.active {
    color: var(--color-sidebar-active-text);
    font-weight: 500;
}

/* --- Sidebar Overlay (mobile) --- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-overlay);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}

/* --- Main Content --- */
.content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
}

.content-inner {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: var(--content-padding);
}

/* --- Typography --- */
.chapter-content h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.chapter-content h2 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
    line-height: 1.4;
}

.chapter-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.chapter-content h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.chapter-content p {
    margin-bottom: 1rem;
}

.chapter-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 2rem 0;
}

.chapter-content ul,
.chapter-content ol {
    margin-bottom: 1rem;
    padding-left: 1.75rem;
}

.chapter-content li {
    margin-bottom: 0.375rem;
}

.chapter-content li > ul,
.chapter-content li > ol {
    margin-top: 0.375rem;
    margin-bottom: 0;
}

.chapter-content strong {
    font-weight: 700;
    color: var(--color-heading);
}

/* --- Blockquote --- */
.chapter-content blockquote {
    background: var(--color-blockquote-bg);
    border-left: 4px solid var(--color-blockquote-border);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    color: var(--color-text);
}

.chapter-content blockquote p:last-child {
    margin-bottom: 0;
}

/* --- Inline Code --- */
.chapter-content code {
    font-family: var(--font-code);
    font-size: 0.875em;
    background: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 0.125em 0.375em;
    border-radius: 3px;
    border: 1px solid var(--color-code-border);
    word-break: break-word;
}

/* --- Code Blocks --- */
.chapter-content pre {
    background: var(--color-code-bg);
    border: 1px solid var(--color-code-border);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    line-height: var(--line-height-code);
}

.chapter-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: var(--font-size-sm);
    color: var(--color-code-text);
    white-space: pre;
    word-break: normal;
    font-variant-ligatures: none;
}

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 1.5rem 0;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-table-border);
}

.chapter-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-table);
}

.chapter-content thead th {
    background: var(--color-table-header-bg);
    font-weight: 700;
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 2px solid var(--color-table-border);
    white-space: nowrap;
}

.chapter-content tbody td {
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--color-table-border);
    vertical-align: top;
}

.chapter-content tbody tr:nth-child(even) {
    background: var(--color-table-stripe);
}

.chapter-content tbody tr:last-child td {
    border-bottom: none;
}

/* --- Chapter Navigation (Prev/Next) --- */
.chapter-nav {
    display: flex;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.chapter-nav a {
    flex: 1;
    display: block;
    padding: 1rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-speed), background var(--transition-speed);
}

.chapter-nav a:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
}

.chapter-nav .nav-prev {
    text-align: left;
}

.chapter-nav .nav-next {
    text-align: right;
}

.chapter-nav .nav-direction {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.chapter-nav .nav-title {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-heading);
}

/* --- Buttons (theme toggle, lang toggle) --- */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.btn-icon:hover {
    background: var(--color-sidebar-hover);
    border-color: var(--color-accent);
}

.btn-lang {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 36px;
    padding: 0 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    font-size: var(--font-size-xs);
    font-weight: 500;
    font-family: var(--font-body);
    text-decoration: none;
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.btn-lang:hover {
    background: var(--color-sidebar-hover);
    border-color: var(--color-accent);
}

/* --- Hamburger Icon --- */
.sidebar-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
    padding: 0;
}

.sidebar-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform var(--transition-speed), opacity var(--transition-speed);
}

/* --- Index Page (Cover) --- */
.cover {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.cover-inner {
    max-width: 720px;
    width: 100%;
    text-align: center;
}

.cover h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.cover .subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.cover .cover-controls {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.cover .start-btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--border-radius);
    font-size: var(--font-size-lg);
    font-weight: 700;
    font-family: var(--font-body);
    border: none;
    cursor: pointer;
    transition: opacity var(--transition-speed);
    text-decoration: none;
}

.cover .start-btn:hover {
    opacity: 0.9;
    color: #fff;
}

.cover-toc {
    text-align: left;
    margin-top: 2rem;
}

.cover-toc h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.cover-toc-list {
    list-style: none;
    padding: 0;
}

.cover-toc-list li {
    border-bottom: 1px solid var(--color-border);
}

.cover-toc-list a {
    display: block;
    padding: 0.75rem 0;
    color: var(--color-text);
    font-size: var(--font-size-sm);
    transition: color var(--transition-speed);
}

.cover-toc-list a:hover {
    color: var(--color-accent);
}

.cover-toc-list .chapter-num {
    font-weight: 700;
    color: var(--color-accent);
    margin-right: 0.75rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .content-inner {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 280px;
        z-index: 300;
    }

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

    .sidebar-toggle {
        display: flex;
    }

    .content {
        margin-left: 0;
    }

    .content-inner {
        padding: 1.25rem;
        padding-top: calc(var(--mobile-header-height) + 1.25rem);
    }

    .chapter-content h1 {
        font-size: 1.375rem;
    }

    .chapter-content h2 {
        font-size: 1.125rem;
        margin-top: 2rem;
    }

    .chapter-content h3 {
        font-size: 1rem;
    }

    .chapter-content pre {
        padding: 1rem;
        font-size: var(--font-size-xs);
    }

    .chapter-content pre code {
        font-size: var(--font-size-xs);
    }

    .chapter-nav {
        flex-direction: column;
    }

    .chapter-nav .nav-next {
        text-align: left;
    }

    .cover h1 {
        font-size: 1.5rem;
    }

    .cover .subtitle {
        font-size: 1rem;
    }
}

/* --- Dark-theme image adaptation --- */
[data-theme="dark"] .dark-invert img {
    filter: brightness(0) invert(1);
}

/* --- SVG Diagrams --- */
.diagram-svg {
    margin: 1.5rem 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.diagram-svg svg {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}

.diagram-svg svg text {
    font-family: var(--font-body);
    fill: var(--color-text);
}

.diagram-svg svg text.label-small {
    font-size: 11px;
}

.diagram-svg svg text.label-mono {
    font-family: var(--font-code);
    font-size: 12px;
}

.diagram-svg svg rect.box {
    fill: var(--color-bg-secondary);
    stroke: var(--color-accent);
    stroke-width: 1.5;
    rx: 4;
    ry: 4;
}

.diagram-svg svg rect.box-alt {
    fill: var(--color-blockquote-bg);
    stroke: var(--color-blockquote-border);
    stroke-width: 1.5;
    rx: 4;
    ry: 4;
}

.diagram-svg svg rect.box-muted {
    fill: var(--color-bg-secondary);
    stroke: var(--color-border);
    stroke-width: 1;
    rx: 4;
    ry: 4;
}

.diagram-svg svg rect.box-danger {
    fill: var(--color-bg-secondary);
    stroke: #ef4444;
    stroke-width: 1.5;
    rx: 4;
    ry: 4;
}

.diagram-svg svg rect.zone {
    fill: none;
    stroke: var(--color-border);
    stroke-width: 1;
    stroke-dasharray: 6 3;
    rx: 6;
    ry: 6;
}

.diagram-svg svg rect.zone-solid {
    fill: none;
    stroke: var(--color-border);
    stroke-width: 1.5;
    rx: 6;
    ry: 6;
}

.diagram-svg svg line,
.diagram-svg svg polyline,
.diagram-svg svg path.arrow {
    stroke: var(--color-text-secondary);
    stroke-width: 1.5;
    fill: none;
}

.diagram-svg svg line.dashed,
.diagram-svg svg path.dashed {
    stroke-dasharray: 5 3;
}

.diagram-svg svg line.thick,
.diagram-svg svg path.thick {
    stroke-width: 2.5;
    stroke: var(--color-accent);
}

.diagram-svg svg marker path,
.diagram-svg svg marker polygon {
    fill: var(--color-text-secondary);
}

.diagram-svg svg marker.thick path,
.diagram-svg svg marker.thick polygon {
    fill: var(--color-accent);
}

.diagram-svg svg text.zone-label {
    font-size: 11px;
    fill: var(--color-text-secondary);
    font-weight: 500;
}

.diagram-svg svg text.note {
    font-size: 11px;
    fill: var(--color-text-secondary);
    font-style: italic;
}

.diagram-svg svg .cross {
    stroke: #ef4444;
    stroke-width: 2;
}

/* --- Dark theme: force override inline SVG styles --- */
[data-theme="dark"] .diagram-svg svg text {
    fill: var(--color-text) !important;
}
[data-theme="dark"] .diagram-svg svg text.zone-label,
[data-theme="dark"] .diagram-svg svg text.note {
    fill: var(--color-text-secondary) !important;
}
/* Base rule: all rects (with or without class) */
[data-theme="dark"] .diagram-svg svg rect {
    fill: var(--color-bg-secondary) !important;
    stroke: var(--color-accent) !important;
}
[data-theme="dark"] .diagram-svg svg rect.box-alt,
[data-theme="dark"] .diagram-svg svg rect[class*="alt"] {
    fill: var(--color-blockquote-bg) !important;
    stroke: var(--color-blockquote-border) !important;
}
[data-theme="dark"] .diagram-svg svg rect.zone,
[data-theme="dark"] .diagram-svg svg rect.zone-solid,
[data-theme="dark"] .diagram-svg svg rect[class*="zone"] {
    fill: none !important;
    stroke: var(--color-border) !important;
}
[data-theme="dark"] .diagram-svg svg rect.box-danger,
[data-theme="dark"] .diagram-svg svg rect[class*="danger"],
[data-theme="dark"] .diagram-svg svg rect[class*="reject"],
[data-theme="dark"] .diagram-svg svg rect[class*="ng"],
[data-theme="dark"] .diagram-svg svg rect[class*="fail"] {
    fill: var(--color-bg-secondary) !important;
    stroke: #ef4444 !important;
}
[data-theme="dark"] .diagram-svg svg rect[class*="approve"],
[data-theme="dark"] .diagram-svg svg rect[class*="ok"],
[data-theme="dark"] .diagram-svg svg rect[class*="pass"] {
    fill: var(--color-bg-secondary) !important;
    stroke: #22c55e !important;
}
[data-theme="dark"] .diagram-svg svg rect[class*="warn"],
[data-theme="dark"] .diagram-svg svg rect[class*="cond"] {
    fill: var(--color-bg-secondary) !important;
    stroke: #eab308 !important;
}
[data-theme="dark"] .diagram-svg svg rect[class*="info"] {
    fill: var(--color-bg-secondary) !important;
    stroke: #a78bfa !important;
}
[data-theme="dark"] .diagram-svg svg rect.box-muted,
[data-theme="dark"] .diagram-svg svg rect[class*="muted"] {
    fill: var(--color-bg-secondary) !important;
    stroke: var(--color-border) !important;
}
[data-theme="dark"] .diagram-svg svg line,
[data-theme="dark"] .diagram-svg svg polyline {
    stroke: var(--color-text-secondary) !important;
}
[data-theme="dark"] .diagram-svg svg marker path,
[data-theme="dark"] .diagram-svg svg marker polygon {
    fill: var(--color-text-secondary) !important;
}
[data-theme="dark"] .diagram-svg svg circle {
    fill: var(--color-accent) !important;
}
[data-theme="dark"] .diagram-svg svg text[class*="num"] {
    fill: #fff !important;
}

/* Template/Form styled blocks */
.template-block {
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.template-block .template-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-heading);
    text-align: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border);
}

.template-block .template-section {
    margin-top: 1rem;
    font-weight: 700;
    color: var(--color-heading);
}

.template-block .template-field {
    margin: 0.25rem 0 0.25rem 1rem;
    color: var(--color-text);
}

.template-block .template-field-label {
    display: inline-block;
    min-width: 160px;
}

/* Callout box (for summary/explanation blocks) */
.callout-box {
    background: var(--color-blockquote-bg);
    border: 1px solid var(--color-blockquote-border);
    border-radius: var(--border-radius);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
}

.callout-box .callout-title {
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 0.5rem;
}

.callout-box ul {
    margin: 0.5rem 0 0.5rem 1.25rem;
}

.callout-box li {
    margin-bottom: 0.25rem;
}

.callout-box .callout-footer {
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

/* --- Tips Box --- */
.tips-box {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, #fffbeb 100%);
    border: 1px solid #f59e0b;
    border-left: 4px solid #f59e0b;
    border-radius: var(--border-radius);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
}
[data-theme="dark"] .tips-box {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, #422006 100%);
    border-color: #d97706;
}
.tips-box .tips-title {
    font-weight: 700;
    font-size: 0.9375rem;
    color: #92400e;
    margin-bottom: 0.5rem;
}
[data-theme="dark"] .tips-box .tips-title { color: #fbbf24; }
.tips-box .tips-title::before { content: "\1F4A1 "; }
.tips-box p { margin-bottom: 0.5rem; font-size: var(--font-size-sm); line-height: 1.8; }
.tips-box p:last-child { margin-bottom: 0; }
.tips-box code { font-size: 0.8125em; }
.tips-box ul, .tips-box ol { margin: 0.5rem 0 0.5rem 1.25rem; font-size: var(--font-size-sm); }
.tips-box li { margin-bottom: 0.25rem; }

/* --- Print --- */
@media print {
    .sidebar,
    .mobile-header,
    .sidebar-overlay,
    .chapter-nav,
    .search-box {
        display: none !important;
    }

    .content {
        margin-left: 0;
    }

    .content-inner {
        max-width: 100%;
        padding: 0;
    }
}