/*------------------------------------------------------------------------------
  IoT Class - Modern Tier-Based Theme
  Adapted from AI for Sensor Data Playbook styling principles
  12 Parts organized by learning tier with gradient color scheme
------------------------------------------------------------------------------*/

@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@400;600;700&family=Source+Code+Pro:wght@400;500&display=swap');

:root {
  /* Primary Palette - IoT Theme */
  --iot-midnight: #2C3E50;
  --iot-deep: #34495E;
  --iot-navy: #2E5CB8;
  --iot-ocean: #3498DB;
  --iot-azure: #2E5CB8;
  --iot-sky: #00A3B4;
  --iot-electric: #00B878;
  --iot-mint: #27AE60;
  --iot-teal: #00B878;

  /* Neutral Palette */
  --iot-sand: #F5F5F5;
  --iot-cloud: #ECECEC;
  --iot-mist: #E0E0E0;
  --iot-foam: #ffffff;
  --iot-border: #BDBDBD;
  --iot-border-light: rgba(189, 189, 189, 0.5);
  --iot-muted: #757575;
  --iot-text-dark: #2C3E50;

  /* Accent Colors */
  --iot-accent-warm: #F7931E;
  --iot-accent-success: #27AE60;
  --iot-accent-warning: #F7CA18;
  --iot-accent-error: #E74C3C;

  /* Part Colors - 12 Parts organized by tier
     TIER 1 - FOUNDATIONS (Blue spectrum) */
  --part-fundamentals-color: #2980B9;      /* Part 1: IoT Fundamentals */
  --part-reference-color: #3498DB;         /* Part 2: Reference Models */

  /* TIER 2 - PHYSICAL (Green spectrum) */
  --part-sensing-color: #27AE60;           /* Part 3: Sensing & Actuation */
  --part-edge-color: #2ECC71;              /* Part 4: Edge & Fog Computing */

  /* TIER 3 - CONNECTIVITY (Orange spectrum) */
  --part-network-fundamentals-color: #E67E22;  /* Part 5: Network Fundamentals */
  --part-short-range-color: #F39C12;       /* Part 6: Short-Range Protocols */
  --part-long-range-color: #D35400;        /* Part 7: Long-Range & Cellular */
  --part-app-protocols-color: #E74C3C;     /* Part 8: Application Protocols */

  /* TIER 4 - INTELLIGENCE (Purple spectrum) */
  --part-data-color: #9B59B6;              /* Part 9: Data & Analytics */

  /* TIER 5 - TRUST (Red spectrum) */
  --part-security-color: #C0392B;          /* Part 10: Security & Privacy */

  /* TIER 6 - IMPLEMENTATION (Teal spectrum) */
  --part-human-color: #16A085;             /* Part 11: Human-Centered Design */
  --part-design-color: #1ABC9C;            /* Part 12: Design & Prototyping */

  /* Special sections */
  --part-hubs-color: #009AF1;              /* Learning Hubs - Blue */
  --part-applications-color: #8B2332;      /* Applications - Red */
  --part-architecture-color: #B8511F;      /* Architecture - Orange */

  /* Effects */
  --iot-highlight: rgba(46, 92, 184, 0.12);
  --iot-highlight-strong: rgba(46, 92, 184, 0.2);
  --iot-shadow-sm: 0 2px 8px rgba(44, 62, 80, 0.06);
  --iot-shadow-md: 0 8px 24px rgba(44, 62, 80, 0.10);
  --iot-shadow-lg: 0 16px 48px rgba(44, 62, 80, 0.14);
  --iot-shadow-xl: 0 24px 64px rgba(44, 62, 80, 0.18);

  /* Gradients */
  --gradient-tech: linear-gradient(135deg, #2980B9 0%, #2E5CB8 35%, #00A3B4 65%, #27AE60 100%);
  --gradient-sky: linear-gradient(135deg, #00A3B4 0%, #27AE60 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(46, 92, 184, 0.05) 0%, rgba(0, 163, 180, 0.05) 100%);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--iot-text-dark);
  background: var(--iot-sand);
  margin: 0;
  padding: 0;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

main.content {
  background: transparent;
  box-shadow: none;
  padding: 0;
}

#quarto-content {
  background: transparent;
  padding: 2rem 1rem 2.5rem;
  gap: 0.5rem;
  max-width: 100%;
}

.page-columns {
  max-width: 100%;
  gap: 0.5rem;
}

main.content > *:first-child {
  margin-top: 0;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--iot-midnight);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

h1 {
  font-size: 2.75rem;
  background: var(--gradient-subtle);
  border-left: 5px solid var(--iot-azure);
  border-bottom: 2px solid var(--iot-border-light);
  padding: 0.75rem 1.25rem 0.75rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  transition: border-left-color var(--transition-base);
}

h1:hover {
  border-left-color: var(--iot-electric);
}

h2 {
  font-size: 2.1rem;
  border-bottom: 2px solid var(--iot-mist);
  padding-bottom: 0.6rem;
  margin-top: 2.75rem;
  margin-bottom: 1.25rem;
  position: relative;
  transition: color var(--transition-base);
}

h2::before {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-sky);
  border-radius: 2px;
}

h3 {
  font-size: 1.65rem;
  color: var(--iot-ocean);
  margin-top: 2.25rem;
  margin-bottom: 1rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--iot-sky);
  transition: all var(--transition-base);
}

h3:hover {
  color: var(--iot-azure);
  border-left-color: var(--iot-electric);
}

h4 {
  font-size: 1.35rem;
  color: var(--iot-navy);
  margin-top: 1.75rem;
  margin-bottom: 0.85rem;
}

/* Title block */
#title-block-header.quarto-title-block {
  position: relative;
  background: var(--iot-foam);
  border-radius: 20px;
  border: 1px solid var(--iot-border-light);
  padding: 2.5rem 3rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--iot-shadow-lg);
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

#title-block-header.quarto-title-block:hover {
  transform: translateY(-2px);
  box-shadow: var(--iot-shadow-xl);
}

#title-block-header.quarto-title-block::before {
  content: "";
  position: absolute;
  inset: 0;
  height: 8px;
  background: var(--gradient-tech);
  border-radius: 20px 20px 0 0;
  pointer-events: none;
}

#title-block-header.quarto-title-block::after {
  content: "";
  position: absolute;
  top: 8px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* Title block header - increased specificity to avoid !important */
#title-block-header.quarto-title-block .title,
body #title-block-header .title {
  font-size: 2.85rem;
  color: var(--iot-midnight);
  margin-bottom: 0.5rem;
  border-bottom: none;
}

#title-block-header.quarto-title-block .subtitle,
body #title-block-header .subtitle {
  font-size: 1.3rem;
  color: var(--iot-muted);
  margin-bottom: 0.75rem;
}

#title-block-header .quarto-title-meta,
#title-block-header .quarto-title-meta-author {
  margin-top: 1.9rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(15, 23, 41, 0.08);
  display: grid;
  gap: 1rem 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

#title-block-header .quarto-title-meta-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--iot-muted);
}

#title-block-header .quarto-title-meta-contents {
  font-weight: 600;
  color: var(--iot-midnight);
}

/* Navigation */
.quarto-secondary-nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--iot-border-light);
  box-shadow: var(--iot-shadow-md);
  transition: box-shadow var(--transition-base);
}

.quarto-secondary-nav:hover {
  box-shadow: var(--iot-shadow-lg);
}

.quarto-secondary-nav .btn {
  color: var(--iot-midnight);
  transition: all var(--transition-base);
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
}

.quarto-secondary-nav .btn:hover {
  color: var(--iot-azure);
  background: var(--iot-highlight);
}

/* Sidebar */
#quarto-sidebar {
  background: rgba(255, 255, 255, 0.97);
  border-right: 1px solid var(--iot-border-light);
  box-shadow: var(--iot-shadow-md);
  padding: 1rem 0.75rem 1rem 1rem;
}

body.nav-sidebar .sidebar-navigation {
  overflow: visible !important;
  max-height: none;
}

body.nav-sidebar .sidebar-menu-container {
  max-height: none;
}

body.nav-sidebar .sidebar {
  height: auto !important;
  min-height: auto !important;
  max-height: none !important;
}

body.nav-sidebar #quarto-sidebar {
  max-height: none !important;
  height: max-content !important;
  min-height: 0;
}

#quarto-sidebar .sidebar-title {
  font-weight: 700;
  color: var(--iot-midnight);
  letter-spacing: 0.05em;
  padding: 0.75rem 0.85rem;
  background: var(--gradient-subtle);
  border-radius: 8px;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

/* ==========================================
   COMPACT SIDEBAR STYLING FOR 200+ CHAPTERS
   ========================================== */

#quarto-sidebar .sidebar-item {
  margin: 0.05rem 0;
}

/* Make items more compact for better navigation with 200+ chapters */
#quarto-sidebar .sidebar-item-container {
  min-height: auto;
  padding: 0;
}

/* Force no capitalization on chapter links - increased specificity */
body #quarto-sidebar .sidebar-item a .sidebar-item-text,
body.quarto-document #quarto-sidebar .sidebar-item a .sidebar-item-text,
body .sidebar nav .sidebar-item a,
body .sidebar-item-text,
#quarto-sidebar .sidebar-item-text {
  text-transform: none;
}

#quarto-sidebar .sidebar-item a {
  color: var(--iot-text-dark);
  font-weight: 500;
  padding: 0.28rem 0.5rem;
  display: block;
  border-radius: 4px;
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
  font-size: 0.76rem;
  line-height: 1.25;
  text-transform: none;
}

/* Hover will be handled by JavaScript for part-specific colors */
#quarto-sidebar .sidebar-item a:hover {
  transform: translateX(2px);
}

/* Active chapter - fallback style, JS will override with part color */
#quarto-sidebar .sidebar-item a.active {
  font-weight: 600;
}

#quarto-sidebar .sidebar-search {
  margin: 0.75rem 0 1.25rem;
}

/* Margin sidebar - Reduced width, compact styling */
#quarto-margin-sidebar {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--iot-border-light);
  border-radius: 14px;
  box-shadow: var(--iot-shadow-md);
  padding: 1.25rem 1rem;
  transition: box-shadow var(--transition-base);
  min-width: var(--toc-sidebar-min, 240px);
  width: var(--toc-sidebar-width, clamp(240px, 22vw, 320px));
  max-width: var(--toc-sidebar-max, 340px);
  overflow: visible;
}

#quarto-margin-sidebar:hover {
  box-shadow: var(--iot-shadow-lg);
}

#TOC {
  position: sticky;
  top: 5rem;
  width: 100%;
}

#TOC .toc-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--iot-muted);
  margin-bottom: 0.75rem;
  font-weight: 600;
  padding-bottom: 0;
  border-bottom: none;
}

#TOC nav {
  font-size: 0.85rem;
  width: 100%;
}

#TOC ul {
  padding-left: 0;
  margin: 0;
  list-style: none;
  border-left: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

#TOC li {
  margin: 0;
  line-height: 1.25;
}

#TOC a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--iot-text-dark);
  transition: all var(--transition-base);
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  line-height: 1.2;
  font-size: 0.85rem;
  width: 100%;
  text-decoration: none;
  white-space: normal;
}

#TOC a:hover {
  color: var(--iot-azure);
  background: var(--iot-highlight);
  font-weight: 600;
}

#TOC a.active {
  color: var(--iot-azure);
  font-weight: 700;
  position: relative;
}

#TOC a.active::before {
  content: "";
  position: absolute;
  left: -0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 3px;
  background: var(--iot-azure);
  border-radius: 50%;
  box-shadow: 0 0 4px var(--iot-azure);
}

#TOC a .header-section-number {
  font-weight: 600;
  min-width: 2.1rem;
  text-align: right;
  color: var(--iot-muted);
}

#TOC a .toc-short-label {
  flex: 1 1 auto;
  min-width: 0;
  white-space: normal;
  overflow: visible;
  word-break: break-word;
}

/* Links */
a {
  color: var(--iot-azure);
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
}

a:hover,
a:focus {
  color: var(--iot-ocean);
  text-decoration: none;
}

a:hover::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-sky);
  animation: linkUnderline 0.3s ease-out;
}

@keyframes linkUnderline {
  from {
    transform: scaleX(0);
    transform-origin: left;
  }
  to {
    transform: scaleX(1);
    transform-origin: left;
  }
}

a:visited {
  color: var(--iot-navy);
}

/* Code and pre */
code,
pre {
  font-family: 'Source Code Pro', ui-monospace, SFMono-Regular, 'DejaVu Sans Mono', monospace;
  font-size: 0.95rem;
}

code {
  background: var(--iot-cloud);
  color: var(--iot-midnight);
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--iot-border-light);
  font-weight: 500;
  transition: all var(--transition-fast);
}

code:hover {
  background: var(--iot-mist);
  border-color: var(--iot-border);
}

pre {
  background: var(--iot-cloud);
  border-left: 4px solid var(--iot-azure);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  overflow-x: auto;
  margin: 2rem 0;
  box-shadow: var(--iot-shadow-md);
  position: relative;
  transition: all var(--transition-base);
}

pre:hover {
  box-shadow: var(--iot-shadow-lg);
  border-left-color: var(--iot-electric);
}

pre::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.03));
  pointer-events: none;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: 0.9rem;
}

.code-fold-btn,
.code-tools-button {
  background: var(--iot-azure);
  color: var(--iot-foam);
  border: none;
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.code-fold-btn:hover,
.code-tools-button:hover {
  background: var(--iot-electric);
}

/* Tables */
table {
  width: 100%;
  margin: 2.5rem 0;
  border-collapse: collapse;
  background: var(--iot-foam);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--iot-shadow-md);
  border: 1px solid var(--iot-border-light);
  transition: box-shadow var(--transition-base);
}

table:hover {
  box-shadow: var(--iot-shadow-lg);
}

thead {
  background: var(--gradient-tech);
  color: var(--iot-foam);
  position: relative;
}

thead::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-sky);
}

thead th {
  padding: 1rem 1.25rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  text-align: left;
}

tbody td {
  padding: 0.95rem 1.25rem;
  border-bottom: 1px solid var(--iot-mist);
  font-size: 0.95rem;
  transition: background-color var(--transition-fast);
}

tbody tr:nth-child(even) {
  background: var(--iot-sand);
}

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

tbody tr:hover {
  background: var(--iot-highlight);
}

tbody tr:hover td {
  color: var(--iot-midnight);
}

/* Callouts */
div.callout {
  margin: 2rem 0;
  padding: 1.75rem 2rem;
  border-left: 5px solid;
  border-radius: 14px;
  background: var(--iot-foam);
  box-shadow: var(--iot-shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

div.callout::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 150px;
  height: 100%;
  opacity: 0.3;
  pointer-events: none;
}

div.callout:hover {
  box-shadow: var(--iot-shadow-lg);
  transform: translateY(-2px);
}

div.callout-note {
  border-left-color: var(--iot-azure);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(59, 130, 246, 0.02));
}

div.callout-note::before {
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent);
}

div.callout-tip {
  border-left-color: var(--iot-mint);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.03));
}

div.callout-tip::before {
  background: radial-gradient(circle at top right, rgba(16, 185, 129, 0.15), transparent);
}

div.callout-warning {
  border-left-color: var(--iot-accent-warning);
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.08), rgba(234, 179, 8, 0.03));
}

div.callout-warning::before {
  background: radial-gradient(circle at top right, rgba(234, 179, 8, 0.15), transparent);
}

div.callout-important,
div.callout-caution {
  border-left-color: var(--iot-accent-error);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(239, 68, 68, 0.03));
}

div.callout-important::before,
div.callout-caution::before {
  background: radial-gradient(circle at top right, rgba(239, 68, 68, 0.15), transparent);
}

.callout-title {
  font-weight: 700;
  color: var(--iot-midnight);
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

/* Blockquotes */
blockquote {
  margin: 2.5rem 0;
  padding: 1.75rem 2rem 1.75rem 2.25rem;
  border-left: 5px solid var(--iot-electric);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(6, 182, 212, 0.02));
  border-radius: 14px;
  color: var(--iot-text-dark);
  font-style: italic;
  box-shadow: var(--iot-shadow-md);
  position: relative;
  transition: all var(--transition-base);
}

blockquote:hover {
  box-shadow: var(--iot-shadow-lg);
  transform: translateX(4px);
  border-left-color: var(--iot-mint);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  top: -10px;
  left: 15px;
  font-size: 4rem;
  color: var(--iot-electric);
  opacity: 0.2;
  font-style: normal;
  line-height: 1;
}

blockquote p {
  margin: 0;
  position: relative;
  z-index: 1;
}

/* Figures */
figure {
  margin: 3rem 0;
  text-align: center;
}

img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: var(--iot-shadow-lg);
  transition: all var(--transition-slow);
  border: 1px solid var(--iot-border-light);
}

/* Generated figures - preserve aspect ratio */
.cell-output-display img,
.quarto-figure img,
figure.quarto-float img {
  width: auto;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

img:hover {
  box-shadow: var(--iot-shadow-xl);
  transform: scale(1.02);
}

figcaption {
  margin-top: 1.25rem;
  font-size: 0.9rem;
  color: var(--iot-muted);
  font-style: italic;
  padding: 0.5rem 1rem;
  background: var(--iot-sand);
  border-radius: 8px;
  display: inline-block;
}

/* ==========================================
   PART HEADERS IN SIDEBAR - COMPACT
   JavaScript will apply colors dynamically
   ========================================== */

.sidebar-item.sidebar-item-section {
  margin-top: 0.6rem;
  margin-bottom: 0.25rem;
}

/* Part header text - styled by JavaScript */
.sidebar-item.sidebar-item-section > .sidebar-item-text {
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.4rem 0.6rem;
  border-radius: 5px;
  display: block;
  cursor: pointer;
  transition: all var(--transition-fast);
}

/* Part div inside (contains the part name) */
.sidebar-item.sidebar-item-section .part {
  font-weight: 700;
}

/* Toggle button - make compact */
.sidebar-item.sidebar-item-section .sidebar-item-toggle {
  padding: 0.3rem 0.4rem;
}

/* ==========================================
   CHAPTER ITEMS - STYLED BY JAVASCRIPT
   JavaScript handles all part-specific colors
   ========================================== */

/* Nested chapters under parts */
ul.sidebar-section {
  margin-top: 0.25rem;
  padding-left: 0.5rem;
}

ul.sidebar-section li.sidebar-item {
  margin: 0.05rem 0;
}

/* Base chapter link styling - JS will apply colors */
/* Increased specificity to avoid !important */
body ul.sidebar-section .sidebar-item a,
#quarto-sidebar ul.sidebar-section .sidebar-item a {
  font-size: 0.74rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  padding: 0.25rem 0.45rem;
  border-left: 2px solid transparent;
  color: #2c3e50;
  border-radius: 4px;
  transition: all var(--transition-fast);
  display: block;
}

/* Mermaid diagram styling */
.mermaid {
  font-size: 16px !important;
  background: var(--iot-foam);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: var(--iot-shadow-md);
  margin: 2rem 0;
  overflow-x: auto;
}

.mermaid svg {
  max-width: 100%;
  height: auto;
  min-height: 300px;
}

.mermaid .nodeLabel,
.mermaid .edgeLabel,
.mermaid .label,
.mermaid text {
  font-size: 14px !important;
  font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif !important;
  fill: var(--iot-text-dark) !important;
}

.mermaid .cluster-label text,
.mermaid .cluster text {
  font-size: 16px !important;
  font-weight: 600 !important;
  fill: var(--iot-midnight) !important;
}

.mermaid .node rect,
.mermaid .node circle,
.mermaid .node polygon {
  fill: var(--iot-cloud) !important;
  stroke: var(--iot-azure) !important;
  stroke-width: 2px !important;
}

.mermaid .cluster rect {
  fill: var(--iot-sand) !important;
  stroke: var(--iot-border) !important;
  stroke-width: 1px !important;
  rx: 8px;
  ry: 8px;
}

.mermaid .edgePath .path {
  stroke: var(--iot-navy) !important;
  stroke-width: 2px !important;
}

.mermaid .arrowheadPath {
  fill: var(--iot-navy) !important;
}

/* Responsive tweaks */
@media (max-width: 1200px) {
  #quarto-content {
    padding: 2.25rem 1.5rem 3rem;
    gap: 1rem;
  }

  #title-block-header.quarto-title-block {
    padding: 2.1rem 2.2rem;
  }
}

@media (max-width: 992px) {
  #quarto-content {
    padding: 2rem 1.5rem 2.75rem;
  }

  #quarto-margin-sidebar {
    position: static;
    margin-top: 2rem;
    padding: 1.25rem 1rem;
    width: 100% !important;
    min-width: auto !important;
    max-width: none !important;
  }

  #quarto-sidebar {
    box-shadow: none;
    padding: 0.75rem 0.5rem;
  }

  .sidebar-item.sidebar-item-section > .sidebar-item-text {
    font-size: 0.7rem;
    padding: 0.35rem 0.5rem;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 2.2rem;
  }

  h2 {
    font-size: 1.7rem;
  }

  #quarto-content {
    padding: 1.65rem 1.25rem 2.5rem;
  }

  #title-block-header.quarto-title-block {
    padding: 1.8rem 1.6rem;
  }

  .sidebar-item.sidebar-item-section > .sidebar-item-text {
    font-size: 0.68rem;
    padding: 0.3rem 0.45rem;
    letter-spacing: 0.04em;
  }

  ul.sidebar-section .sidebar-item a {
    font-size: 0.72rem;
    padding: 0.22rem 0.4rem;
  }

  #quarto-margin-sidebar {
    padding: 1rem 0.85rem;
  }

  #TOC .toc-title {
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
  }

  #TOC a {
    font-size: 0.82rem;
  }

  #TOC li {
    margin-bottom: 0.3rem;
  }
}

/* Lists */
ul, ol {
  padding-left: 1.2rem;
}

li {
  margin-bottom: 0.35rem;
}

/* Selection / focus */
::selection {
  background: rgba(59, 130, 246, 0.35);
  color: var(--iot-midnight);
}

:focus-visible {
  outline: 3px solid rgba(6, 182, 212, 0.6);
  outline-offset: 3px;
}

/* Print styles */
@media print {
  body {
    background: white;
  }

  .quarto-secondary-nav,
  #quarto-sidebar,
  #quarto-margin-sidebar,
  .nav-footer {
    display: none;
  }

  #quarto-content {
    max-width: 100%;
  }
}