/* ==========================================================================
   《以日为鉴：衰退时代生存指南》- 全响应式自适应阅读系统
   Default Theme: OLED Black (纯黑)
   Themes Supported: Black (Default), Slate, Sepia, Light
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;

  --line-height: 1.85;
  --base-font-size: 16.5px;
  --content-max-width: 900px;
  --sidebar-width: 320px;
  --header-height: 60px;
  --border-radius: 8px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 1. Theme: OLED Black (DEFAULT) */
html[data-theme="black"] {
  --bg-page: #000000;
  --bg-sidebar: #0a0c10;
  --bg-header: rgba(10, 12, 16, 0.85);
  --bg-card: #0e1217;
  --bg-card-hover: #161b22;
  --bg-code: #13171f;
  --bg-table-stripe: #0a0d12;
  --border-color: #21262d;
  --border-highlight: #30363d;
  
  --text-main: #e6edf3;
  --text-muted: #8b949e;
  --text-subtle: #484f58;
  
  --accent: #58a6ff;
  --accent-rgb: 88, 166, 255;
  --accent-hover: #79b8ff;
  --accent-bg: rgba(88, 166, 255, 0.12);
  
  --tag-bg: #1c2128;
  --tag-text: #58a6ff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.6);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.8);
}

/* 2. Theme: Dark Slate */
html[data-theme="slate"] {
  --bg-page: #0d1117;
  --bg-sidebar: #161b22;
  --bg-header: rgba(22, 27, 34, 0.88);
  --bg-card: #161b22;
  --bg-card-hover: #1f242c;
  --bg-code: #1f242c;
  --bg-table-stripe: #12151b;
  --border-color: #30363d;
  --border-highlight: #484f58;
  
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --text-subtle: #6e7681;
  
  --accent: #58a6ff;
  --accent-rgb: 88, 166, 255;
  --accent-hover: #79b8ff;
  --accent-bg: rgba(88, 166, 255, 0.15);
  
  --tag-bg: #21262d;
  --tag-text: #79c0ff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.6);
}

/* 3. Theme: Warm Sepia */
html[data-theme="sepia"] {
  --bg-page: #f4ecd8;
  --bg-sidebar: #ece0c6;
  --bg-header: rgba(236, 224, 198, 0.9);
  --bg-card: #fbf5e6;
  --bg-card-hover: #f3e9d2;
  --bg-code: #ece2c8;
  --bg-table-stripe: #efe6cf;
  --border-color: #dcd0b5;
  --border-highlight: #c9baa0;
  
  --text-main: #382e21;
  --text-muted: #74634f;
  --text-subtle: #9c8a74;
  
  --accent: #a86217;
  --accent-rgb: 168, 98, 23;
  --accent-hover: #c47621;
  --accent-bg: rgba(168, 98, 23, 0.12);
  
  --tag-bg: #e6dac1;
  --tag-text: #824706;
  --shadow-sm: 0 1px 3px rgba(60,40,15,0.08);
  --shadow-md: 0 4px 12px rgba(60,40,15,0.12);
}

/* 4. Theme: Paper Light */
html[data-theme="light"] {
  --bg-page: #f6f8fa;
  --bg-sidebar: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.9);
  --bg-card: #ffffff;
  --bg-card-hover: #f3f4f6;
  --bg-code: #f1f3f5;
  --bg-table-stripe: #fafbfc;
  --border-color: #d0d7de;
  --border-highlight: #afb8c1;
  
  --text-main: #1f2328;
  --text-muted: #656d76;
  --text-subtle: #8c959f;
  
  --accent: #0969da;
  --accent-rgb: 9, 105, 218;
  --accent-hover: #1a7f37;
  --accent-bg: rgba(9, 105, 218, 0.08);
  
  --tag-bg: #eaeef2;
  --tag-text: #0969da;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

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

html {
  font-size: var(--base-font-size);
  scroll-behavior: smooth;
}

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

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #f78166);
  z-index: 1000;
  transition: width 0.1s ease-out;
}

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

/* Sidebar */
.site-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 900;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-logo {
  font-size: 1.8rem;
}

.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-title a {
  color: var(--text-main);
  text-decoration: none;
}

.site-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.sidebar-close-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
}

.sidebar-search {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-search input {
  width: 100%;
  padding: 8px 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

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

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px;
  scrollbar-width: thin;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 4px 10px 8px 10px;
  letter-spacing: 0.05em;
}

.nav-list {
  list-style: none;
}

.nav-item {
  margin-bottom: 3px;
  border-radius: 6px;
  transition: background-color var(--transition);
}

.nav-item.active {
  background-color: var(--accent-bg);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.88rem;
  border-radius: 6px;
}

.nav-item.active .nav-link {
  color: var(--accent);
  font-weight: 600;
}

.nav-link:hover {
  background-color: var(--bg-card-hover);
}

.chapter-badge {
  font-size: 0.65rem;
  padding: 2px 5px;
  border-radius: 4px;
  background-color: var(--tag-bg);
  color: var(--text-muted);
  font-weight: 600;
  flex-shrink: 0;
}

.badge-analysis {
  color: #58a6ff;
  background-color: rgba(88, 166, 255, 0.15);
}

.badge-moc {
  color: #3fb950;
  background-color: rgba(63, 185, 80, 0.15);
}

.badge-full {
  color: #d29922;
  background-color: rgba(210, 153, 34, 0.15);
}

.chapter-num {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  width: 18px;
  text-align: right;
  flex-shrink: 0;
}

.chapter-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Main Wrapper */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Top Navbar */
.top-navbar {
  height: var(--header-height);
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 800;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.menu-toggle-btn {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  align-items: center;
  gap: 6px;
}

.nav-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.breadcrumb-item {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb-current {
  color: var(--text-main);
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-tabs-pill {
  display: flex;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3px;
  gap: 2px;
}

.tab-pill {
  padding: 4px 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 16px;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-pill.active {
  background-color: var(--accent);
  color: #ffffff;
  font-weight: 600;
}

.tab-pill:hover:not(.active) {
  color: var(--text-main);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.theme-control {
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.theme-select {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 5px 8px;
  border-radius: 6px;
  font-size: 0.82rem;
  outline: none;
  cursor: pointer;
}

.font-size-control {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.font-btn {
  background-color: var(--bg-card);
  border: none;
  color: var(--text-main);
  padding: 4px 8px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background-color var(--transition);
}

.font-btn:first-child {
  border-right: 1px solid var(--border-color);
}

.font-btn:hover {
  background-color: var(--bg-card-hover);
}

/* Main Content */
.content-container {
  flex: 1;
  padding: 32px 24px 64px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.article-body {
  width: 100%;
  max-width: var(--content-max-width);
}

/* Reciprocal Counterpart Switch Card */
.counterpart-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--border-radius);
  margin-bottom: 28px;
  border: 1px solid;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.counterpart-to-analysis {
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.1) 0%, rgba(56, 139, 253, 0.03) 100%);
  border-color: rgba(88, 166, 255, 0.3);
}

.counterpart-to-original {
  background: linear-gradient(135deg, rgba(63, 185, 80, 0.1) 0%, rgba(46, 160, 67, 0.03) 100%);
  border-color: rgba(63, 185, 80, 0.3);
}

.counterpart-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.counterpart-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.counterpart-desc {
  font-size: 0.88rem;
  color: var(--text-main);
}

.counterpart-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background-color: var(--accent);
  color: #ffffff;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: opacity var(--transition);
}

.counterpart-btn:hover {
  opacity: 0.9;
}

.counterpart-arrow {
  font-size: 1rem;
}

/* Article Meta Header */
.article-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.meta-dot {
  color: var(--border-highlight);
}

.meta-tag {
  display: inline-block;
  padding: 2px 8px;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 12px;
  font-size: 0.75rem;
  margin-right: 4px;
}

/* Markdown Typography */
.markdown-content h1 {
  font-size: 2.1rem;
  line-height: 1.35;
  margin: 1.2em 0 0.8em 0;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4em;
}

.markdown-content h2 {
  font-size: 1.55rem;
  line-height: 1.4;
  margin: 1.8em 0 0.7em 0;
  color: var(--text-main);
  position: relative;
}

.markdown-content h3 {
  font-size: 1.25rem;
  margin: 1.4em 0 0.5em 0;
  color: var(--text-main);
}

.markdown-content h4 {
  font-size: 1.05rem;
  margin: 1.2em 0 0.4em 0;
}

.markdown-content p {
  margin-bottom: 1.2em;
  text-align: justify;
  text-justify: inter-ideograph;
}

.markdown-content ul, .markdown-content ol {
  margin: 0.8em 0 1.2em 1.8em;
}

.markdown-content li {
  margin-bottom: 0.4em;
}

.markdown-content blockquote {
  border-left: 4px solid var(--accent);
  padding: 10px 18px;
  margin: 1.2em 0;
  background-color: var(--bg-card);
  color: var(--text-muted);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.markdown-content blockquote p {
  margin-bottom: 0.5em;
}

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

.markdown-content hr {
  border: 0;
  height: 1px;
  background: var(--border-color);
  margin: 2.2em 0;
}

.markdown-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.markdown-content a:hover {
  color: var(--accent-hover);
}

.markdown-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: 1.5em auto;
  display: block;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.6em 0;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.markdown-content th, .markdown-content td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  line-height: 1.6;
}

.markdown-content th {
  background-color: var(--bg-header);
  font-weight: 600;
  color: var(--text-main);
  border-bottom: 2px solid var(--border-highlight);
}

.markdown-content tr:nth-child(even) td {
  background-color: var(--bg-table-stripe);
}

.markdown-content tr:hover td {
  background-color: var(--bg-card-hover);
}

/* Obsidian Callouts */
.callout {
  border-radius: var(--border-radius);
  margin: 1.6em 0;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.callout-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-color);
}

.callout-icon {
  font-size: 1.1rem;
}

.callout-body {
  padding: 14px 18px;
  font-size: 0.92rem;
}

.callout-body p:last-child {
  margin-bottom: 0;
}

.callout-note, .callout-info {
  border-left: 4px solid #58a6ff;
}
.callout-note .callout-title, .callout-info .callout-title {
  background-color: rgba(88, 166, 255, 0.1);
  color: #58a6ff;
}

.callout-tip {
  border-left: 4px solid #3fb950;
}
.callout-tip .callout-title {
  background-color: rgba(63, 185, 80, 0.1);
  color: #3fb950;
}

.callout-important {
  border-left: 4px solid #a371f7;
}
.callout-important .callout-title {
  background-color: rgba(163, 113, 247, 0.1);
  color: #a371f7;
}

.callout-warning {
  border-left: 4px solid #d29922;
}
.callout-warning .callout-title {
  background-color: rgba(210, 153, 34, 0.1);
  color: #d29922;
}

.callout-caution {
  border-left: 4px solid #f85149;
}
.callout-caution .callout-title {
  background-color: rgba(248, 81, 73, 0.1);
  color: #f85149;
}

.callout-summary {
  border-left: 4px solid #2da44e;
}
.callout-summary .callout-title {
  background-color: rgba(45, 164, 78, 0.1);
  color: #2da44e;
}

/* ==========================================================================
   ENHANCED INTERACTIVE DIAGRAM VIEWER (Zoom, Pan, Fullscreen)
   ========================================================================== */
.diagram-viewer {
  margin: 2.2em 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: border-color var(--transition);
}

.diagram-viewer:hover {
  border-color: var(--border-highlight);
}

.diagram-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 8px;
}

.diagram-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.diagram-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  background-color: var(--accent-bg);
  padding: 3px 8px;
  border-radius: 4px;
}

.diagram-zoom-level {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  background: var(--bg-page);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.diagram-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.diag-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-main);
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.diag-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-fullscreen-launch {
  background-color: var(--accent-bg) !important;
  color: var(--accent) !important;
  border-color: var(--accent) !important;
}

.diagram-scroll-canvas {
  width: 100%;
  max-height: 650px;
  min-height: 280px;
  overflow: auto;
  position: relative;
  background-color: var(--bg-page);
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  scrollbar-width: thin;
}

.diagram-scroll-canvas.dragging {
  cursor: grabbing;
}

.diagram-inner {
  transform-origin: center center;
  transition: transform 0.12s ease-out;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 100%;
}

.diagram-inner .mermaid {
  display: flex;
  justify-content: center;
  width: 100%;
}

.diagram-inner svg {
  height: auto !important;
  display: block;
  margin: 0 auto;
}

/* Prevent SVG from shrinking below readable size */
.diagram-scroll-canvas[data-fit="true"] .diagram-inner svg {
  max-width: 100%;
  min-width: 680px;
}

.diagram-scroll-canvas[data-fit="false"] .diagram-inner svg {
  max-width: none !important;
  width: auto !important;
}

.diagram-footer {
  padding: 8px 16px;
  background-color: var(--bg-header);
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Fullscreen Modal */
.diagram-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
}

.diagram-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
}

.diagram-modal-container {
  position: relative;
  width: 96vw;
  height: 94vh;
  background-color: var(--bg-card);
  border: 1px solid var(--border-highlight);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0,0,0,0.9);
  z-index: 2;
}

.diagram-modal-header {
  padding: 12px 20px;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-close {
  background-color: #da3633 !important;
  color: #ffffff !important;
  border-color: #f85149 !important;
}

.modal-close:hover {
  background-color: #b62324 !important;
}

.diagram-modal-body {
  flex: 1;
  overflow: auto;
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
  background-color: var(--bg-page);
}

.diagram-modal-body.dragging {
  cursor: grabbing;
}

.diagram-modal-body svg {
  max-width: none !important;
  height: auto !important;
  transform-origin: center center;
  transition: transform 0.12s ease-out;
}

.diagram-modal-footer {
  padding: 10px 20px;
  background-color: var(--bg-header);
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* ==========================================================================
   NATIVE RESPONSIVE HTML VISUAL ROADMAP (For Knowledge Map MOC)
   ========================================================================== */
.native-roadmap-wrapper {
  margin: 2.2em 0;
}

.roadmap-intro-card {
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.12) 0%, rgba(56, 139, 253, 0.03) 100%);
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
}

.roadmap-intro-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.roadmap-intro-desc {
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.7;
}

.roadmap-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.roadmap-phase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition);
}

.roadmap-phase-card:hover {
  border-color: var(--border-highlight);
}

.phase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 10px;
}

.phase-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.phase-pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  color: #ffffff;
  letter-spacing: 0.04em;
}

.pill-p1 { background: linear-gradient(135deg, #1f6feb, #388bfd); }
.pill-p2 { background: linear-gradient(135deg, #d29922, #e3b341); color: #000; }
.pill-p3 { background: linear-gradient(135deg, #f85149, #da3633); }
.pill-p4 { background: linear-gradient(135deg, #a371f7, #8957e5); }
.pill-p5 { background: linear-gradient(135deg, #238636, #2ea043); }

.phase-heading {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

.phase-theme-tag {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--tag-bg);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.phase-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.step-card {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
  transition: all var(--transition);
}

.step-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.step-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.step-num-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.step-icon {
  font-size: 1.1rem;
}

.step-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin: 2px 0;
}

.step-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.step-action-link {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.step-action-link:hover {
  text-decoration: underline;
}

.phase-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: -6px 0;
}

.connector-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: var(--bg-header);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.phase-footer-links {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.phase-footer-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.phase-chip-link {
  font-size: 0.76rem;
  padding: 3px 8px;
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}

.phase-chip-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mermaid-section-divider {
  margin: 2.5em 0 1.2em 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
}

.divider-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Bottom Navigation */
.bottom-page-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  gap: 16px;
}

.page-nav-col {
  flex: 1;
}

.page-nav-link {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  text-decoration: none;
  background-color: var(--bg-card);
  transition: var(--transition);
}

.page-nav-link.prev {
  align-items: flex-start;
}

.page-nav-link.next {
  align-items: flex-end;
  text-align: right;
}

.page-nav-link:hover {
  border-color: var(--accent);
  background-color: var(--bg-card-hover);
}

.nav-dir {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.nav-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.page-nav-moc-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  background-color: var(--bg-card);
  transition: var(--transition);
}

.page-nav-moc-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Footer */
.site-footer {
  margin-top: 60px;
  text-align: center;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
  color: var(--text-muted);
  font-size: 0.82rem;
  width: 100%;
  max-width: var(--content-max-width);
}

.footer-title {
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.footer-meta {
  margin-bottom: 12px;
  font-size: 0.78rem;
}

.footer-back-to-top a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
}

/* Floating Switcher Pill for Mobile & Desktop */
.floating-counterpart-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent);
  color: #ffffff;
  padding: 10px 18px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  z-index: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}

.floating-counterpart-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.6);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .nav-tabs-pill {
    display: none;
  }
}

@media (max-width: 900px) {
  .phase-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 54px;
  }

  .site-sidebar {
    transform: translateX(-100%);
    width: 290px;
    box-shadow: var(--shadow-md);
  }

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

  .sidebar-close-btn {
    display: block;
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(2px);
    z-index: 850;
  }

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

  .main-wrapper {
    margin-left: 0;
  }

  .menu-toggle-btn {
    display: flex;
  }

  .nav-breadcrumbs {
    display: none;
  }

  .content-container {
    padding: 16px 14px 48px 14px;
  }

  .markdown-content h1 {
    font-size: 1.6rem;
  }

  .markdown-content h2 {
    font-size: 1.3rem;
  }

  .counterpart-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 16px;
  }

  .counterpart-btn {
    width: 100%;
    justify-content: center;
  }

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

  .page-nav-link.next {
    align-items: flex-start;
    text-align: left;
  }

  .floating-counterpart-btn {
    bottom: 16px;
    right: 16px;
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .phase-steps-grid {
    grid-template-columns: 1fr;
  }

  .roadmap-phase-card {
    padding: 16px;
  }

  .phase-heading {
    font-size: 1.05rem;
  }

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

  .diagram-toolbar {
    width: 100%;
    justify-content: space-between;
  }
}