/* ==========================================================================
   dsh-superagent Technical Whitepaper — Clean Notion Light Theme
   Pure solid backgrounds, crisp 1px borders, warm grays, high readability
   ========================================================================== */

:root {
  /* Pure Solid Backgrounds (No gradients) */
  --bg-base: #ffffff;
  --bg-surface: #f7f7f5;
  --bg-card: #ffffff;
  --bg-card-hover: #f7f7f5;
  --bg-code: #f7f6f3;
  --bg-table-header: #f7f6f3;
  --bg-table-hover: #fbfbfa;

  /* Notion Typography Colors */
  --text-primary: #37352f;
  --text-secondary: #5a564c;
  --text-muted: #787774;

  /* Notion Crisp Hairline Borders */
  --border-subtle: #e9e9e7;
  --border-strong: #d3d1cb;
  --border-highlight: #2383e2;

  /* Notion Semantic Palette (Soft backgrounds + deep readable foregrounds) */
  --accent-blue: #2383e2;
  --tag-blue-bg: #e7f3f8;
  --tag-blue-text: #185a9d;

  --tag-green-bg: #edf3ec;
  --tag-green-text: #2b593f;

  --tag-amber-bg: #fbf3db;
  --tag-amber-text: #89632a;

  --tag-rose-bg: #fdebec;
  --tag-rose-text: #9e2a2b;

  --tag-purple-bg: #f6f3f9;
  --tag-purple-text: #6940a5;

  --tag-gray-bg: #f1f1ef;
  --tag-gray-text: #5a564c;

  /* Inline code Notion style */
  --code-inline-bg: rgba(135, 131, 120, 0.15);
  --code-inline-text: #eb5757;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "PT Mono", "Liberation Mono", Courier, monospace;

  --radius-lg: 6px;
  --radius-md: 4px;
  --radius-sm: 3px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-base);
  color: var(--text-primary);
}

a {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  transition: color 0.12s ease, text-decoration-color 0.12s ease;
}

a:hover {
  color: var(--accent-blue);
  text-decoration-color: var(--accent-blue);
}

/* Top Navigation Bar — Notion Breadcrumb / Header Bar Style */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.top-nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  text-decoration: none !important;
}

.brand-badge {
  background-color: var(--tag-gray-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
}

.nav-link {
  padding: 5px 10px;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none !important;
  white-space: nowrap;
  transition: background-color 0.12s ease, color 0.12s ease;
}

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

.nav-link.active {
  color: var(--text-primary);
  background-color: var(--tag-gray-bg);
  font-weight: 600;
}

.nav-link .ch-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-right: 4px;
}

/* Page Layout */
.layout-wrapper {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 44px 24px 88px;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 48px;
  flex: 1;
}

.layout-wrapper.single-col {
  grid-template-columns: minmax(0, 1fr);
  max-width: 960px;
}

/* Sidebar TOC — Notion Minimalist Outline */
.sidebar {
  position: sticky;
  top: 76px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 8px;
}

.sidebar-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.toc-list {
  list-style: none;
  border-left: 1px solid var(--border-subtle);
}

.toc-item a {
  display: block;
  padding: 5px 8px 5px 14px;
  font-size: 0.84rem;
  color: var(--text-muted);
  text-decoration: none !important;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: all 0.12s ease;
  line-height: 1.4;
}

.toc-item a:hover,
.toc-item a.active {
  color: var(--text-primary);
  border-left-color: var(--text-primary);
  background-color: var(--bg-surface);
  font-weight: 500;
}

.toc-item.sub a {
  padding-left: 26px;
  font-size: 0.8rem;
}

/* Hero Section — Notion Document Header Style */
.hero {
  background-color: var(--bg-base);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 0 32px 0;
  margin-bottom: 36px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.hero h1 {
  font-size: 2.25rem;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 860px;
  line-height: 1.68;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.meta-pill {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
}

.meta-pill strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Main Content Typography & Sections */
.content-section {
  margin-bottom: 48px;
  scroll-margin-top: 72px;
}

.section-header {
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 28px 0 10px;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 20px 0 8px;
}

p {
  margin-bottom: 14px;
  color: var(--text-primary);
}

ul, ol {
  margin: 0 0 16px 22px;
  color: var(--text-primary);
}

li {
  margin-bottom: 6px;
}

li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Notion-style Inline Code & Code Blocks */
code {
  font-family: var(--font-mono);
  font-size: 85%;
  background-color: var(--code-inline-bg);
  color: var(--code-inline-text);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  background-color: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 14px 0 22px;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.84rem;
  line-height: 1.6;
}

/* Cards & Grids — Notion Database Gallery / Callout Box Style */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 16px 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 16px 0;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 16px 0;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.card:hover {
  border-color: var(--border-strong);
}

.card.interactive {
  text-decoration: none !important;
  display: block;
}

.card.interactive:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.card-title {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.card p {
  color: var(--text-secondary);
}

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

/* Metric / Stat Cards */
.stat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.stat-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Notion-style Multi-select Pill Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.badge-cyan   { background-color: var(--tag-blue-bg);   color: var(--tag-blue-text); }
.badge-emerald{ background-color: var(--tag-green-bg);  color: var(--tag-green-text); }
.badge-amber  { background-color: var(--tag-amber-bg);  color: var(--tag-amber-text); }
.badge-rose   { background-color: var(--tag-rose-bg);   color: var(--tag-rose-text); }
.badge-indigo { background-color: var(--tag-purple-bg); color: var(--tag-purple-text); }
.badge-purple { background-color: var(--tag-purple-bg); color: var(--tag-purple-text); }

/* Notion Callout Blocks (Solid muted surface) */
.callout {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--text-primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 18px 0;
}

.callout.warn {
  background-color: var(--tag-amber-bg);
  border-color: #f1e3b8;
  border-left: 3px solid var(--tag-amber-text);
}

.callout.emerald {
  background-color: var(--tag-green-bg);
  border-color: #d6e6d4;
  border-left: 3px solid var(--tag-green-text);
}

.callout.rose {
  background-color: var(--tag-rose-bg);
  border-color: #f5d0d2;
  border-left: 3px solid var(--tag-rose-text);
}

.callout-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* Notion Database Tables */
.table-wrap {
  overflow-x: auto;
  margin: 16px 0 26px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--bg-base);
}

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

th {
  background-color: var(--bg-table-header);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  white-space: nowrap;
}

th:last-child {
  border-right: none;
}

td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  color: var(--text-primary);
  vertical-align: top;
}

td:last-child {
  border-right: none;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: var(--bg-table-hover);
}

/* Diagram Containers (SVG & Mermaid) */
.diagram-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 20px 0 28px;
  overflow-x: auto;
}

.diagram-box pre.mermaid {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  text-align: center;
}

.diagram-caption {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
}

/* Chapter Navigation Footer */
.chapter-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.pager-btn {
  flex: 1;
  max-width: 48%;
  background-color: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  text-decoration: none !important;
  transition: background-color 0.12s ease, border-color 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pager-btn:hover {
  border-color: var(--border-strong);
  background-color: var(--bg-surface);
}

.pager-btn.next {
  text-align: right;
  margin-left: auto;
}

.pager-label {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.pager-title {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  padding: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .layout-wrapper {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}
/* ==========================================================================
   Native Notion Visual Blueprint Components (Replaces complex Mermaid charts)
   ========================================================================== */

.arch-canvas {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin: 20px 0 28px;
}

.arch-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.arch-title-text {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

.arch-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.arch-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  display: inline-block;
}

/* Layered Pipeline Flow */
.arch-layer {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  position: relative;
}

.arch-layer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border-subtle);
}

.arch-layer-title {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.arch-layer-meta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.arch-node-grid {
  display: grid;
  gap: 12px;
}

.arch-node-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.arch-node-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.arch-node-grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.arch-node-grid.cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.arch-node {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.arch-node.blue   { background-color: var(--tag-blue-bg);   border-color: #cbe3f0; }
.arch-node.green  { background-color: var(--tag-green-bg);  border-color: #cde0ca; }
.arch-node.amber  { background-color: var(--tag-amber-bg);  border-color: #eedca8; }
.arch-node.purple { background-color: var(--tag-purple-bg); border-color: #dfd5ec; }
.arch-node.rose   { background-color: var(--tag-rose-bg);   border-color: #f2c6c8; }

.arch-node-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.arch-node-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Downward Connector Arrows between Layers */
.arch-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 10px 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

.arch-connector-pill {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 3px 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.76rem;
}

/* Horizontal Step Pipeline (For State Machines & Rollout) */
.step-pipeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.step-box {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step-box-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.step-num {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background-color: var(--tag-gray-bg);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-list li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  margin: 0;
}

/* Split Dual-Path Comparison Flow */
.dual-flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.flow-lane {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.flow-lane-title {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flow-step-item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  align-items: start;
  padding: 9px 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.flow-step-idx {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--text-muted);
  padding-top: 2px;
}

.flow-arrow-down {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  line-height: 1;
}

@media (max-width: 900px) {
  .arch-node-grid.cols-2,
  .arch-node-grid.cols-3,
  .arch-node-grid.cols-4,
  .arch-node-grid.cols-5,
  .step-pipeline,
  .dual-flow {
    grid-template-columns: 1fr;
  }
}