/* ═══════════════════════════════════════════════════════════════════
   UNDETECTED & UNDERTREATED — custom.css v6
   Key fix: code-tools: true + code-fold: true (not show)
   .code-tools-button selector wires up the global Code ▾ button
   ═══════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Sora:wght@400;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── DESIGN TOKENS ───────────────────────────────────────────────── */
:root {
  --navy:       #0D1F35;
  --navy-mid:   #163050;
  --teal:       #028090;
  --teal-light: #03A0B3;
  --mint:       #02C39A;
  --mint-dark:  #019270;
  --cream:      #F4F7F9;
  --cream-dark: #E8EDF2;
  --red:        #D94F3D;
  --gold:       #E8A838;
  --gold-dark:  #b07c10;
  --gray:       #64748B;
  --gray-light: #94A3B8;
  --white:      #ffffff;

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px  rgba(13,31,53,0.08);
  --shadow-md: 0 6px 24px rgba(13,31,53,0.12);
  --shadow-lg: 0 16px 48px rgba(13,31,53,0.16);

  --transition: all 0.22s cubic-bezier(0.4,0,0.2,1);

  /* Bootstrap / flatly overrides */
  --bs-body-bg:             #F4F7F9;
  --bs-body-color:          #0D1F35;
  --bs-body-font-family:    'Inter', system-ui, sans-serif;
  --bs-link-color:          #028090;
  --bs-link-hover-color:    #02C39A;
  --bs-link-color-rgb:      2, 128, 144;
  --bs-primary:             #028090;
  --bs-primary-rgb:         2, 128, 144;
  --bs-border-color:        #E8EDF2;
  --bs-border-radius:       12px;
  --bs-border-radius-sm:    6px;
  --bs-border-radius-lg:    20px;
  --bs-heading-color:       #0D1F35;
  --bs-navbar-color:        rgba(255,255,255,0.75);
  --bs-navbar-hover-color:  #02C39A;
  --bs-navbar-active-color: #02C39A;
  --bs-navbar-bg:           #0D1F35;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--navy);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

/* ═══════════════════════════════════════════════════════════════════
   CODE TOOLS BUTTON  ← THE FIX
   Quarto renders this as .code-tools-button inside the navbar.
   Must be visible, styled, and pointer-events: auto.
   Works because _quarto.yml now has code-fold: true (not show),
   giving the button a real toggle action to perform.
   ═══════════════════════════════════════════════════════════════════ */
.code-tools-button {
  display: inline-flex !important;
  justify-content: center;
  align-items: center;
  padding: 0.25em 0.85em;
  background: rgba(2,195,154,0.12);
  border: 1px solid rgba(2,195,154,0.35);
  color: var(--mint) !important;
  border-radius: 1000px;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none !important;
  white-space: nowrap;
}

.code-tools-button:hover {
  background: var(--mint);
  color: var(--navy) !important;
  border-color: var(--mint);
  box-shadow: 0 0 20px rgba(2,195,154,0.40);
  text-decoration: none !important;
}

/* Dropdown menu spawned by the code-tools button */
.code-tools-button + .dropdown-menu,
.dropdown-menu[aria-labelledby="quarto-code-tools-menu"] {
  background: var(--navy) !important;
  border: 1px solid rgba(2,195,154,0.25) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-lg) !important;
  min-width: 160px;
  z-index: 9999 !important;
}

.code-tools-button + .dropdown-menu .dropdown-item,
.dropdown-menu[aria-labelledby="quarto-code-tools-menu"] .dropdown-item {
  color: rgba(255,255,255,0.80) !important;
  font-size: 0.83rem !important;
  font-weight: 500 !important;
  padding: 0.45rem 1rem !important;
  transition: var(--transition);
}

.code-tools-button + .dropdown-menu .dropdown-item:hover,
.dropdown-menu[aria-labelledby="quarto-code-tools-menu"] .dropdown-item:hover {
  background: rgba(2,195,154,0.15) !important;
  color: var(--mint) !important;
}

/* ── SIDEBAR COLLAPSE TOGGLE — keep hidden ───────────────────────── */
#quarto-sidebar-toggle,
.quarto-sidebar-toggle,
button.sidebar-toggle,
#sidebar-toggle {
  display: none !important;
}

/* ── PER-CHUNK FOLD TOGGLE ───────────────────────────────────────── */
details.code-fold {
  margin-bottom: 1rem;
}

details.code-fold > summary {
  cursor: pointer;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  list-style: none;
}

details.code-fold > summary::-webkit-details-marker { display: none; }

details.code-fold > summary::before {
  content: "▶ ";
  font-size: 0.7em;
}

details.code-fold[open] > summary::before {
  content: "▼ ";
}

.code-fold-btn-container {
  display: flex !important;
  margin-bottom: 0.4rem;
}

.code-fold-btn-container .btn,
.quarto-code-fold-btn {
  display: inline-flex !important;
  align-items: center;
  gap: 0.3rem;
  background: rgba(2,128,144,0.10) !important;
  border: 1px solid rgba(2,128,144,0.25) !important;
  color: var(--teal) !important;
  font-family: 'Inter', sans-serif !important;
  font-size: 0.78rem !important;
  font-weight: 600 !important;
  border-radius: var(--radius-sm) !important;
  padding: 0.22rem 0.75rem !important;
  cursor: pointer !important;
  transition: var(--transition) !important;
  box-shadow: none !important;
}

.code-fold-btn-container .btn:hover,
.quarto-code-fold-btn:hover {
  background: var(--teal) !important;
  color: white !important;
  border-color: var(--teal) !important;
}

/* ── NAVBAR ──────────────────────────────────────────────────────── */
.navbar {
  background: var(--navy) !important;
  border-bottom: 2px solid var(--teal);
  padding: 0 1.5rem;
  height: 58px;
}

.navbar-brand {
  font-family: 'Sora', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--mint) !important;
  letter-spacing: -0.3px;
}

.navbar .nav-link {
  color: rgba(255,255,255,0.75) !important;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem !important;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.navbar .nav-link:hover {
  color: var(--mint) !important;
  background: rgba(2,195,154,0.1);
}

/* ── LEFT SIDEBAR ────────────────────────────────────────────────── */
.sidebar,
#quarto-sidebar {
  background: var(--navy) !important;
  border-right: none !important;
  box-shadow: 4px 0 24px rgba(0,0,0,0.15);
}

@media (min-width: 992px) {
  #quarto-sidebar {
    display: flex !important;
    flex-direction: column;
    visibility: visible !important;
    transform: translateX(0) !important;
  }
}

.sidebar .sidebar-title,
.sidebar-title a {
  font-family: 'Sora', sans-serif !important;
  font-weight: 700 !important;
  font-size: 0.95rem !important;
  color: var(--mint) !important;
  text-decoration: none !important;
}

.sidebar-item-section-toggle,
.sidebar .sidebar-section > .sidebar-item-toggle-btn,
.sidebar .sidebar-section .sidebar-section-item,
.sidebar .part-title {
  font-size: 0.67rem !important;
  font-weight: 700 !important;
  letter-spacing: 2px !important;
  text-transform: uppercase !important;
  color: rgba(255,255,255,0.38) !important;
  padding: 0.8rem 0.75rem 0.25rem !important;
  margin-top: 0.4rem;
}

.sidebar-item a,
.sidebar .chapter-title,
.sidebar-item .sidebar-item-text,
.sidebar-item a span {
  font-size: 0.84rem !important;
  font-weight: 400 !important;
  color: rgba(255,255,255,0.70) !important;
  padding: 0.3rem 0.75rem !important;
  border-radius: var(--radius-sm);
  display: block;
  transition: var(--transition);
  text-decoration: none !important;
  border-left: 2px solid transparent;
}

.sidebar-item a:hover,
.sidebar .chapter-title:hover,
.sidebar-item a:hover span,
.sidebar-item a:hover .sidebar-item-text {
  color: var(--mint) !important;
  background: rgba(2,195,154,0.08);
  border-left-color: var(--teal);
}

.sidebar-item.active > a,
.sidebar .active > .chapter-title,
.sidebar-item a.active,
.sidebar-item.active .sidebar-item-text,
.sidebar-item.active a span {
  color: var(--mint) !important;
  font-weight: 600 !important;
  background: rgba(2,195,154,0.12);
  border-left: 2px solid var(--mint) !important;
}

/* ── RIGHT TOC ───────────────────────────────────────────────────── */
#quarto-margin-sidebar {
  padding-top: 1.5rem !important;
  background: transparent !important;
}

#quarto-margin-sidebar .toc-title,
#quarto-margin-sidebar p.sidebar-title,
nav[role="doc-toc"] .toc-title {
  font-size: 0.63rem !important;
  font-weight: 700 !important;
  letter-spacing: 2px !important;
  text-transform: uppercase !important;
  color: var(--gray) !important;
  margin-bottom: 0.6rem !important;
}

#quarto-margin-sidebar a,
nav[role="doc-toc"] a {
  color: var(--navy) !important;
  font-size: 0.80rem !important;
  font-weight: 400 !important;
  text-decoration: none !important;
  display: block !important;
  padding: 0.22rem 0.6rem !important;
  border-left: 2px solid transparent !important;
  border-bottom: none !important;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important;
  line-height: 1.45 !important;
  transition: var(--transition) !important;
}

#quarto-margin-sidebar a:hover,
nav[role="doc-toc"] a:hover {
  color: var(--teal) !important;
  background: rgba(2,128,144,0.07) !important;
  border-left-color: var(--teal) !important;
}

#quarto-margin-sidebar .toc-active > a,
#quarto-margin-sidebar li.active > a,
nav[role="doc-toc"] .active > a {
  color: var(--teal) !important;
  font-weight: 600 !important;
  border-left: 2px solid var(--teal) !important;
  background: rgba(2,128,144,0.06) !important;
}

#quarto-margin-sidebar ul ul a,
nav[role="doc-toc"] ul ul a {
  font-size: 0.75rem !important;
  padding-left: 1.1rem !important;
  color: var(--gray) !important;
}

#quarto-margin-sidebar ul ul a:hover,
nav[role="doc-toc"] ul ul a:hover {
  color: var(--teal) !important;
}

/* ── TITLE BLOCK ─────────────────────────────────────────────────── */
#title-block-header:not(:has(.title:not(:empty))),
.quarto-title-block:not(:has(.title:not(:empty))) {
  display: none !important;
}

#quarto-document-content > *:first-child {
  margin-top: 0 !important;
}

.quarto-title-block,
#title-block-header {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 60%, #1a3a5c 100%);
  color: white;
  padding: 2.5rem 2.5rem 2rem;
  margin: -1rem -1rem 2.5rem;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.quarto-title-block::before,
#title-block-header::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(2,128,144,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.quarto-title-block h1,
.quarto-title-block h1.title,
#title-block-header h1,
#title-block-header h1.title,
.quarto-title-block .title,
#title-block-header .title {
  font-family: 'Sora', sans-serif !important;
  font-size: 2.2rem !important;
  font-weight: 800 !important;
  color: white !important;
  line-height: 1.2 !important;
  letter-spacing: -0.5px !important;
  border-bottom: none !important;
  padding-bottom: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0.3rem !important;
}

.quarto-title-block .subtitle,
#title-block-header .description {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.60) !important;
  font-weight: 400;
  margin-top: 0.2rem;
  margin-bottom: 0;
}

.quarto-title-block .quarto-title-meta,
#title-block-header .quarto-title-meta {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.12);
}

.quarto-title-meta-heading {
  font-size: 0.63rem !important;
  font-weight: 700 !important;
  letter-spacing: 2px !important;
  text-transform: uppercase !important;
  color: var(--mint) !important;
  margin-bottom: 0.2rem;
}

.quarto-title-meta-contents {
  color: rgba(255,255,255,0.80) !important;
  font-size: 0.88rem;
}

/* ── TYPOGRAPHY ──────────────────────────────────────────────────── */
h1 {
  font-family: 'Sora', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--navy);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.2;
  letter-spacing: -0.4px;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid var(--teal);
}

h2 {
  font-family: 'Sora', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--teal);
  margin-top: 2.5rem;
  margin-bottom: 0.6rem;
  position: relative;
  padding-left: 0.9rem;
}

h2::before {
  content: '';
  position: absolute;
  left: 0; top: 0.15em;
  width: 3px;
  height: 1em;
  background: linear-gradient(to bottom, var(--teal), var(--mint));
  border-radius: 2px;
}

h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-top: 2rem;
  margin-bottom: 0.4rem;
}

h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 1.5rem;
}

p { margin-bottom: 1.2rem; }

a {
  color: var(--teal);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

a:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

strong { font-weight: 700; color: var(--navy); }

/* ── CODE ────────────────────────────────────────────────────────── */
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.83em;
  color: var(--teal);
  background: rgba(2,128,144,0.10);
  padding: 0.15em 0.45em;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(2,128,144,0.15);
}

pre {
  background: var(--navy) !important;
  border-radius: var(--radius-md) !important;
  border: 1px solid rgba(255,255,255,0.06) !important;
  box-shadow: var(--shadow-md);
  margin: 1.5rem 0;
}

pre code {
  color: #e2e8f0;
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85em;
}

/* ── TABLES ──────────────────────────────────────────────────────── */
.table-responsive {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: white;
}

thead tr { background: var(--navy); color: white; }

th {
  padding: 0.75rem 1rem;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  text-align: left;
  color: rgba(255,255,255,0.9);
  border: none;
}

td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--cream-dark);
  color: var(--navy);
  vertical-align: middle;
}

tbody tr:hover td { background: rgba(2,128,144,0.04); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) td { background: var(--cream); }

/* ── CALLOUT BLOCKS ──────────────────────────────────────────────── */
.callout {
  border: none !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-sm);
  margin: 1.75rem 0;
  overflow: hidden;
}

.callout-important {
  background: rgba(217,79,61,0.05) !important;
  border-left: 5px solid var(--red) !important;
}
.callout-important .callout-title { color: var(--red) !important; }

.callout-note {
  background: rgba(2,128,144,0.05) !important;
  border-left: 5px solid var(--teal) !important;
}
.callout-note .callout-title { color: var(--teal) !important; }

.callout-warning {
  background: rgba(232,168,56,0.07) !important;
  border-left: 5px solid var(--gold) !important;
}
.callout-warning .callout-title { color: var(--gold-dark) !important; }

.callout-tip {
  background: rgba(2,195,154,0.07) !important;
  border-left: 5px solid var(--mint) !important;
}
.callout-tip .callout-title { color: var(--mint-dark) !important; }

.callout-title {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.3px;
}

/* ── FIGURES ─────────────────────────────────────────────────────── */
.quarto-figure {
  margin: 2rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

img { border-radius: var(--radius-md); max-width: 100%; }

figcaption {
  font-size: 0.82rem;
  color: var(--gray-light);
  font-style: italic;
  text-align: center;
  margin-top: 0.6rem;
  padding: 0 1rem;
}

/* ── PAGE NAVIGATION ─────────────────────────────────────────────── */
.page-navigation {
  display: flex;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--cream-dark);
}

.nav-page a {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.25rem;
  background: white;
  border: 1px solid var(--cream-dark) !important;
  border-radius: var(--radius-md) !important;
  text-decoration: none !important;
  border-bottom: 1px solid var(--cream-dark) !important;
  color: var(--navy) !important;
  font-weight: 600;
  font-size: 0.88rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  flex: 1;
}

.nav-page a:hover {
  border-color: var(--teal) !important;
  box-shadow: 0 4px 16px rgba(2,128,144,0.15);
  transform: translateY(-2px);
  color: var(--teal) !important;
}

.nav-page-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--teal) !important;
  margin-bottom: 0.2rem;
}

/* ── FOOTER ──────────────────────────────────────────────────────── */
.nav-footer {
  background: var(--navy) !important;
  border-top: 2px solid var(--teal);
  color: rgba(255,255,255,0.5);
  font-size: 0.8rem;
  padding: 1.25rem 2rem;
}

.nav-footer a {
  color: var(--mint) !important;
  font-weight: 500;
  border-bottom: none !important;
}

.nav-footer a:hover { color: white !important; }

/* ── BACK TO TOP ─────────────────────────────────────────────────── */
#quarto-back-to-top {
  background: var(--teal);
  color: white;
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

#quarto-back-to-top:hover {
  background: var(--mint);
  transform: translateY(-3px);
}

/* ── DIVIDERS ────────────────────────────────────────────────────── */
hr {
  border: none;
  height: 1px;
  background: linear-gradient(to right, var(--teal), transparent);
  margin: 2.5rem 0;
  opacity: 0.3;
}

/* ══════════════════════════════════════════════════════════════════
   UTILITY CLASSES
   ══════════════════════════════════════════════════════════════════ */

.hl-teal { color: var(--teal);     font-weight: 700; }
.hl-mint { color: var(--mint-dark);font-weight: 700; }
.hl-red  { color: var(--red);      font-weight: 700; }
.hl-gold { color: var(--gold-dark);font-weight: 700; }

.metric-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.metric-card {
  background: white;
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  border-top: 4px solid var(--teal);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.metric-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.metric-value {
  display: block;
  font-family: 'Sora', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.metric-card p {
  font-size: 0.82rem;
  color: var(--gray);
  margin: 0;
  font-weight: 500;
}

.lead {
  font-size: 1.1rem;
  color: var(--gray);
  font-weight: 400;
  line-height: 1.8;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--cream-dark);
}

/* ── FIX: code-tools dropdown clips behind title block ──────────── */
.quarto-title-block {
  overflow: visible !important;
}

.dropdown-menu.show {
  z-index: 9999 !important;
}

/* ── RESPONSIVE ──────────────────────────────────────────────────── */
@media (max-width: 991px) {
  .quarto-title-block,
  #title-block-header { padding: 2rem 1.5rem; }
  .quarto-title-block .title,
  #title-block-header .title { font-size: 1.7rem !important; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.15rem; }
}

@media (max-width: 576px) {
  .metric-row { grid-template-columns: 1fr 1fr; }
  .metric-value { font-size: 1.6rem; }
}