/* ── Byline (author + caveat, shown under page title) ── */
.bc-byline {
  color: #999;
  font-size: 0.72rem;
  font-style: italic;
  margin-top: -0.4rem;
  margin-bottom: 1.4rem;
}

/* Hide byline on custom homepage (hero already has its own content) */
html.bc-home .bc-byline {
  display: none;
}

/* Sidebar visual hierarchy helpers (Material for MkDocs). */

/* ═══════════════════════════════════════════════════════════════════
   Level 1: Top-level nav tabs (Overview, Theory, Dolo+ Specification)
   ═══════════════════════════════════════════════════════════════════ */
.md-nav--primary > .md-nav__list > .md-nav__item--nested > .md-nav__link,
.md-nav--primary > .md-nav__list > .md-nav__item--nested > label.md-nav__link {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  font-size: 0.7rem;
  color: var(--md-primary-fg-color);
  margin-top: 1.25rem;
  padding-bottom: 0.5rem;
  opacity: 0.9;
}

/* ═══════════════════════════════════════════════════════════════════
   Level 2: Alpha subsections (A. Modular MDP Foundations, B. Foundations of Bellman calculus)
   ═══════════════════════════════════════════════════════════════════ */
.md-nav__item--nested .md-nav__list .md-nav__item--nested > .md-nav__link,
.md-nav__item--nested .md-nav__list .md-nav__item--nested > label.md-nav__link {
  font-weight: 600 !important;
  color: var(--md-default-fg-color) !important;
  background: transparent;
  border-left: 2px solid var(--md-primary-fg-color);
  padding-left: 0.6rem;
  padding-top: 0.3rem;
  padding-bottom: 0.3rem;
  margin-top: 0.9rem;
  margin-bottom: 0.3rem;
  font-size: 0.76rem;
  letter-spacing: 0.02rem;
  border-radius: 0;
}

/* Hover state for Alpha subsections */
.md-nav__item--nested .md-nav__list .md-nav__item--nested > .md-nav__link:hover,
.md-nav__item--nested .md-nav__list .md-nav__item--nested > label.md-nav__link:hover {
  background: transparent;
  color: var(--md-primary-fg-color) !important;
}

/* Icons for Alpha subsections */
.md-nav__item--nested .md-nav__list .md-nav__item--nested > .md-nav__link .md-nav__icon,
.md-nav__item--nested .md-nav__list .md-nav__item--nested > label.md-nav__link .md-nav__icon {
  color: #00bfa5;
}

/* ═══════════════════════════════════════════════════════════════════
   Level 3: Numbered sections (0. Core Semantic Rules, 1. Foundations)
   Subtle styling - not too prominent
   ═══════════════════════════════════════════════════════════════════ */
.md-nav__item--nested .md-nav__list .md-nav__item--nested .md-nav__list .md-nav__item--nested > .md-nav__link,
.md-nav__item--nested .md-nav__list .md-nav__item--nested .md-nav__list .md-nav__item--nested > label.md-nav__link {
  font-weight: 500 !important;
  color: var(--md-default-fg-color) !important;
  background: transparent !important;
  border-left: 2px solid var(--md-default-fg-color--lighter) !important;
  border-radius: 0 !important;
  padding-left: 0.5rem;
  padding-top: 0.2rem;
  padding-bottom: 0.2rem;
  margin-top: 0.5rem;
  margin-bottom: 0.15rem;
  font-size: 0.72rem;
  opacity: 0.85;
}

/* Hover state for Level 3 */
.md-nav__item--nested .md-nav__list .md-nav__item--nested .md-nav__list .md-nav__item--nested > .md-nav__link:hover,
.md-nav__item--nested .md-nav__list .md-nav__item--nested .md-nav__list .md-nav__item--nested > label.md-nav__link:hover {
  opacity: 1;
  color: var(--md-primary-fg-color) !important;
  border-left-color: var(--md-primary-fg-color) !important;
}

/* Icons for Level 3 */
.md-nav__item--nested .md-nav__list .md-nav__item--nested .md-nav__list .md-nav__item--nested > .md-nav__link .md-nav__icon,
.md-nav__item--nested .md-nav__list .md-nav__item--nested .md-nav__list .md-nav__item--nested > label.md-nav__link .md-nav__icon {
  color: var(--md-default-fg-color--light) !important;
}

/* ═══════════════════════════════════════════════════════════════════
   Utility styles
   ═══════════════════════════════════════════════════════════════════ */

/* Remove extra margin from first Level 1 item */
.md-nav--primary > .md-nav__list > .md-nav__item--nested:first-child > .md-nav__link {
  margin-top: 0;
}

/* Deep links (actual pages) - standard styling */
.md-nav__item:not(.md-nav__item--nested) > .md-nav__link {
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--md-default-fg-color--light);
}

/* Active item highlight */
.md-nav__link--active {
  font-weight: 600 !important;
  color: var(--md-primary-fg-color) !important;
}

/* ═══════════════════════════════════════════════════════════════════
   DARK THEME (Slate + Teal)
   ═══════════════════════════════════════════════════════════════════ */

/* ── Deep dark background ── */
[data-md-color-scheme="slate"] {
  --md-default-bg-color: #1a1a2e;
  --md-default-bg-color--light: #1f1f35;
  --md-default-bg-color--lighter: #25253f;
  --md-default-bg-color--lightest: #2a2a4a;
  --md-primary-fg-color: #00bfa5;
  --md-accent-fg-color: #64ffda;
  --md-typeset-a-color: #64ffda;
}

/* ── Code blocks ── */
[data-md-color-scheme="slate"] .md-typeset code,
[data-md-color-scheme="slate"] .md-typeset pre > code {
  background-color: #0d1117;
  border-radius: 6px;
}

[data-md-color-scheme="slate"] .md-typeset pre {
  border: 1px solid rgba(100, 255, 218, 0.08);
  border-radius: 8px;
}

/* ── Inline code ── */
[data-md-color-scheme="slate"] .md-typeset :not(pre) > code {
  background-color: rgba(100, 255, 218, 0.06);
  color: #b2dfdb;
  border: 1px solid rgba(100, 255, 218, 0.1);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

/* ── Tables ── */
[data-md-color-scheme="slate"] .md-typeset table:not([class]) {
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background-color: rgba(0, 191, 165, 0.12);
  color: #64ffda;
  font-weight: 600;
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) tr:hover {
  background-color: rgba(100, 255, 218, 0.03);
}

/* ── Header ── */
[data-md-color-scheme="slate"] .md-header {
  background-color: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(100, 255, 218, 0.08);
}

/* ── Navigation sidebar ── */
[data-md-color-scheme="slate"] .md-nav__link:hover,
[data-md-color-scheme="slate"] .md-nav__link--active {
  color: #64ffda;
}

/* ── Admonitions ── */
[data-md-color-scheme="slate"] .md-typeset .admonition,
[data-md-color-scheme="slate"] .md-typeset details {
  border-radius: 8px;
  border: 1px solid rgba(100, 255, 218, 0.08);
  background-color: rgba(31, 31, 53, 0.6);
}

/* ── MathJax ── */
[data-md-color-scheme="slate"] .MathJax {
  color: #e0f2f1 !important;
}

/* ── Footer ── */
[data-md-color-scheme="slate"] .md-footer {
  background-color: #12121f;
  border-top: 1px solid rgba(100, 255, 218, 0.06);
}

/* Homepage: hide the "Next/Previous" footer nav strip */
html.bc-home .md-footer__inner {
  display: none !important;
}

/* ── Scrollbar (Webkit) ── */
[data-md-color-scheme="slate"] ::-webkit-scrollbar {
  width: 8px;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-track {
  background: #1a1a2e;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-thumb {
  background: rgba(100, 255, 218, 0.15);
  border-radius: 4px;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-thumb:hover {
  background: rgba(100, 255, 218, 0.3);
}

/* ── Search ── */
[data-md-color-scheme="slate"] .md-search__input {
  background-color: rgba(31, 31, 53, 0.8);
}

/* ── Smooth transitions ── */
.md-typeset a {
  transition: color 0.2s ease;
}

.md-nav__link {
  transition: color 0.15s ease;
}

/* ── Obsidian inline tags (editor-level, hidden in docs) ── */
strong.hash {
  display: none;
}

/* ── Tags below title ── */
.md-content__inner {
  display: flex;
  flex-direction: column;
}

.md-content__inner > * {
  width: 100%;
  min-width: 0;
}

.md-content__inner > .md-tags {
  order: 1;
  margin-bottom: 1em;
}

.md-content__inner > h1 {
  order: 0;
}

.md-content__inner > *:not(.md-tags):not(h1) {
  order: 2;
}

/* ═══════════════════════════════════════════════════════════════════
   Homepage intro two-column layout
   ═══════════════════════════════════════════════════════════════════ */
.bc-home .md-sidebar--primary,
.bc-home .md-sidebar--secondary {
  display: none !important;
}

/* Make homepage content span full width without sidebars */
.bc-home .md-main__inner {
  grid-template-columns: 1fr !important;
}

.bc-home .md-content {
  grid-column: 1 / -1 !important;
}

.bc-intro-row {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.5rem;
  align-items: start;
  margin: 1rem 0 1.5rem;
}

.bc-intro-aside-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bc-intro-aside {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-left: 3px solid #00897B;
  border-radius: 0 6px 6px 0;
  padding: 1rem 1.2rem;
  font-size: 0.88rem;
  line-height: 1.55;
}

.bc-intro-aside strong {
  display: block;
  font-size: 0.95rem;
  color: #00897B;
  margin-bottom: 0.4rem;
}

.bc-intro-aside em {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: #78909C;
}

.bc-intro-aside--compact {
  padding: 0.85rem 1rem;
  font-size: 0.84rem;
  line-height: 1.5;
}

.bc-intro-aside--compact strong {
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.bc-intro-aside--compact p {
  margin: 0.4rem 0;
}

.bc-intro-meta {
  margin-top: 0.55rem;
  font-size: 0.82rem;
  color: #78909C;
}

[data-md-color-scheme="slate"] .bc-intro-meta {
  color: rgba(176, 190, 197, 0.78);
}

[data-md-color-scheme="slate"] .grid.cards > ul > li {
  background: rgba(100, 255, 218, 0.04);
  border-color: rgba(100, 255, 218, 0.1);
}

[data-md-color-scheme="slate"] .grid.cards > ul > li strong {
  color: #F3FBFF;
}

/* ── Small badge "icons" used in homepage cards ── */
.bc-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.45em;
  height: 1.45em;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.85em;
  line-height: 1;
  margin-right: 0.45em;
  border: 1.5px solid currentColor;
  background: transparent;
  transform: translateY(-0.06em);
}

.bc-badge--upsilon,
.bc-badge--arrival {
  color: #00897B;
  background: rgba(0, 137, 123, 0.08);
}

.bc-badge--rho {
  color: #005b8f;
  background: rgba(0, 91, 143, 0.08);
}

.bc-badge--decision {
  color: #f97316;
  background: rgba(249, 115, 22, 0.10);
}

.bc-badge--cont {
  color: #00aeef;
  background: rgba(0, 174, 239, 0.10);
}

[data-md-color-scheme="slate"] .bc-badge {
  background: transparent;
  border-width: 1.25px;
}

[data-md-color-scheme="slate"] .bc-badge--upsilon,
[data-md-color-scheme="slate"] .bc-badge--arrival {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-badge--rho {
  color: #00aeef;
}

[data-md-color-scheme="slate"] .bc-badge--decision {
  color: #f97316;
}

[data-md-color-scheme="slate"] .bc-badge--cont {
  color: #00aeef;
}

/* ═══════════════════════════════════════════════════════════════════
   Υ walkthrough: meaning-map animation (homepage)
   ═══════════════════════════════════════════════════════════════════ */

.bc-meaning-map {
  margin: 1.4rem 0 1.8rem;
}

.bc-meaning-map__code {
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #ffffff;
  overflow: hidden;
}

.bc-meaning-map__panel {
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #f8fafc;
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.bc-mm-kicker {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #00897B;
  font-weight: 700;
}

.bc-mm-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: #06111a;
  margin: 0;
}

.bc-mm-body {
  font-size: 0.92rem;
  line-height: 1.55;
  color: #334155;
}

.bc-mm-body a {
  font-weight: 650;
}

.bc-mm-controls {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(2, 6, 23, 0.08);
}

.bc-mm-controls__btns {
  display: flex;
  gap: 0.5rem;
}

.bc-mm-btn {
  appearance: none;
  border: 1px solid rgba(0, 137, 123, 0.35);
  background: #ffffff;
  color: #00897B;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.bc-mm-btn:hover {
  background: rgba(0, 137, 123, 0.06);
}

.bc-mm-step {
  font-size: 0.82rem;
  color: #64748b;
  font-variant-numeric: tabular-nums;
}

.bc-mm-pre {
  margin: 0;
  padding: 0.75rem 0;
  overflow: auto;
  max-height: none;
}

.bc-mm-code {
  display: block;
  padding: 0.25rem 0;
  font-family: var(--md-code-font-family, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre;
}

.bc-mm-line {
  display: block;
  padding: 0.1rem 0.75rem;
  border-left: 3px solid transparent;
  border-radius: 6px;
}

.bc-mm-lno {
  color: #94a3b8;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.bc-mm-line.is-active {
  background: rgba(0, 137, 123, 0.08);
  border-left-color: #00897B;
}

.bc-mm-line.is-active .bc-mm-lno {
  color: #0f172a;
}

/* Typed YAML comments (GitHub-style) */
.bc-mm-cmt {
  color: #64748b;
}

.bc-mm-cmt.is-typing::after {
  content: "▍";
  margin-left: 2px;
  color: #00897B;
  animation: bc-mm-blink 1s steps(1) infinite;
}

/* When we render inside a normal fenced code block, avoid per-line padding/borders. */
.bc-mm-live .bc-mm-line {
  display: inline;
  padding: 0;
  border-left: 0;
  border-radius: 0;
}

/* Hide the (JSON) steps source block on the page. JS also removes it. */
.bc-mm-steps-src {
  display: none !important;
}

/* Attr-list markers often become empty <p> nodes; hide the following code block too. */
p.bc-mm-steps-src + div.highlight {
  display: none !important;
}

/* Attr-lists currently attach to a wrapping <p> around code blocks. */
p.bc-mm-target {
  margin: 0;
}

.bc-mm-line--comment {
  border-left-color: transparent;
}

.bc-mm-line--comment .bc-mm-txt {
  color: #64748b;
}

.bc-mm-line--comment.is-typing .bc-mm-txt::after {
  content: "▍";
  margin-left: 2px;
  color: #00897B;
  animation: bc-mm-blink 1s steps(1) infinite;
}

@keyframes bc-mm-blink {
  50% { opacity: 0; }
}

/* Hide the raw source block once JS has initialized */
.bc-meaning-map[data-initialized="true"] .bc-mm-src {
  display: none;
}

[data-md-color-scheme="slate"] .bc-meaning-map__code,
[data-md-color-scheme="slate"] .bc-meaning-map__panel {
  border-color: rgba(100, 255, 218, 0.10);
}

[data-md-color-scheme="slate"] .bc-meaning-map__code {
  background: rgba(31, 31, 53, 0.55);
}

[data-md-color-scheme="slate"] .bc-meaning-map__panel {
  background: rgba(31, 31, 53, 0.75);
}

[data-md-color-scheme="slate"] .bc-mm-kicker {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-mm-title {
  color: #F3FBFF;
}

[data-md-color-scheme="slate"] .bc-mm-body {
  color: #B0BEC5;
}

[data-md-color-scheme="slate"] .bc-mm-controls {
  border-top-color: rgba(100, 255, 218, 0.10);
}

[data-md-color-scheme="slate"] .bc-mm-btn {
  background: rgba(13, 17, 23, 0.55);
  border-color: rgba(100, 255, 218, 0.25);
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-mm-btn:hover {
  background: rgba(100, 255, 218, 0.08);
}

[data-md-color-scheme="slate"] .bc-mm-step {
  color: #94a3b8;
}

[data-md-color-scheme="slate"] .bc-mm-lno {
  color: rgba(176, 190, 197, 0.6);
}

[data-md-color-scheme="slate"] .bc-mm-line.is-active {
  background: rgba(100, 255, 218, 0.08);
  border-left-color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-mm-line.is-active .bc-mm-lno {
  color: #F3FBFF;
}

[data-md-color-scheme="slate"] .bc-mm-cmt {
  color: rgba(176, 190, 197, 0.78);
}

[data-md-color-scheme="slate"] .bc-mm-cmt.is-typing::after {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-mm-line--comment .bc-mm-txt {
  color: rgba(176, 190, 197, 0.78);
}

[data-md-color-scheme="slate"] .bc-mm-line--comment.is-typing .bc-mm-txt::after {
  color: #64FFDA;
}

@media (max-width: 960px) {
  .bc-meaning-map {
    display: block;
  }
  .bc-mm-pre {
    max-height: none;
  }
}
[data-md-color-scheme="slate"] .bc-intro-aside {
  background: rgba(100, 255, 218, 0.04);
  border-color: rgba(100, 255, 218, 0.1);
  border-left-color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-intro-aside strong {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-intro-aside em {
  color: #78909C;
}

.bc-ai-box {
  background: rgba(124, 58, 237, 0.05);
  border-color: rgba(124, 58, 237, 0.14);
  border-left-color: #7c3aed;
}

.bc-ai-box strong {
  color: #7c3aed;
}

[data-md-color-scheme="slate"] .bc-ai-box {
  background: rgba(167, 139, 250, 0.07);
  border-color: rgba(167, 139, 250, 0.16);
  border-left-color: #c4b5fd;
}

[data-md-color-scheme="slate"] .bc-ai-box strong {
  color: #c4b5fd;
}

/* ── Embedded chatbot (below YAML example) ── */
.bc-chat-embed {
  margin-top: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
}

.bc-chat-embed__frame {
  /* Streamlit reserves ~80px top padding even with header hidden.
     Sidebar toggle hidden via app CSS, so no left crop needed. */
  --bc-chat-crop-top: 0px;
  --bc-chat-crop-left: 0px;
  margin-top: calc(-1 * var(--bc-chat-crop-top));
  margin-left: calc(-1 * var(--bc-chat-crop-left));
  width: calc(100% + var(--bc-chat-crop-left));
  height: calc(800px + var(--bc-chat-crop-top));
  border: none;
  border-radius: 0;
  background: #1a1a2e;
  display: block;
}

[data-md-color-scheme="slate"] .bc-chat-embed {
  border-color: rgba(100, 255, 218, 0.08);
}

[data-md-color-scheme="slate"] .bc-chat-embed__frame {
  background: #1a1a2e;
}

@media (max-width: 960px) {
  .bc-chat-embed__frame {
    height: calc(500px + var(--bc-chat-crop));
  }
}

@media (max-width: 960px) {
  .bc-intro-row {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   Homepage content styling (below hero)
   ═══════════════════════════════════════════════════════════════════ */

/* Indent main content for breathing room */
.md-content .md-typeset {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 0.5rem;
}

/* ── Full-bleed section bands (homepage) ── */
.bc-section {
  position: relative;
  /* More top padding so section headings don't hug the band edge */
  padding: 3.0rem 0 2.5rem;
  margin: 0;
  z-index: 0;
}

.bc-section::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background: var(--bc-section-bg, transparent);
  z-index: -1;
}

.bc-section > :first-child {
  margin-top: 0;
}

.bc-section > :last-child {
  margin-bottom: 0;
}

.bc-section--a {
  --bc-section-bg: #ffffff;
}

.bc-section--b {
  --bc-section-bg: #f8fafc;
}

[data-md-color-scheme="slate"] .bc-section--a {
  --bc-section-bg: #17172a;
}

[data-md-color-scheme="slate"] .bc-section--b {
  --bc-section-bg: #1f1f35;
}

/* ── Network background: backward nest traversal ──
   As the reader scrolls, each section reveals one more stage in a
   nest being iterated backward (right → left).  The "active" node
   (the one just reached) carries uncertainty ripples; earlier nodes
   fade.  Four progressive SVGs cycle across the eight sections.    */

.bc-section[class*="bc-section--net"]::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: -1;
  /* Start invisible; fade in when section is revealed */
  opacity: 0;
  transition: opacity 1.2s ease 0.15s;
}

/* Fade the network in when the section scrolls into view */
html.bc-home .bc-section[class*="bc-section--net"].bc-reveal--in::after {
  opacity: 1;
}

/* Ensure network is visible if reveal JS hasn't run or is disabled */
html:not(.bc-reveal-init) .bc-section[class*="bc-section--net"]::after {
  opacity: 1;
  transition: none;
}

/* Step 1 — single continuation node (right side) */
.bc-section--net-1::after {
  background:
    radial-gradient(ellipse 400px 300px at 77% 50%,
      rgba(0,191,165,0.04) 0%, transparent 100%),
    url('../assets/bg-net-1.svg') center / cover no-repeat;
}

/* Step 2 — two nodes connected, new one centre */
.bc-section--net-2::after {
  background:
    radial-gradient(ellipse 380px 280px at 57% 48%,
      rgba(0,174,239,0.035) 0%, transparent 100%),
    url('../assets/bg-net-2.svg') center / cover no-repeat;
}

/* Step 3 — three nodes, branch hint, new node left-of-centre */
.bc-section--net-3::after {
  background:
    radial-gradient(ellipse 400px 300px at 37% 44%,
      rgba(0,191,165,0.04) 0%, transparent 100%),
    url('../assets/bg-net-3.svg') center / cover no-repeat;
}

/* Step 4 — full nest with branches, arrival node highlighted */
.bc-section--net-4::after {
  background:
    radial-gradient(ellipse 420px 320px at 20% 47%,
      rgba(0,174,239,0.04) 0%, transparent 100%),
    url('../assets/bg-net-4.svg') center / cover no-repeat;
}

/* Dark theme — filter only; opacity is controlled by the reveal animation */
[data-md-color-scheme="slate"] .bc-section[class*="bc-section--net"]::after {
  filter: invert(1) brightness(1.1);
}

/* Dark theme revealed state caps at 0.7 so the inverted SVG isn't too bright */
[data-md-color-scheme="slate"] html.bc-home .bc-section[class*="bc-section--net"].bc-reveal--in::after {
  opacity: 0.7;
}

[data-md-color-scheme="slate"] html:not(.bc-reveal-init) .bc-section[class*="bc-section--net"]::after {
  opacity: 0.7;
}

/* ── Network pulse: highlighted node + edges flash on scroll-in ──
   Uses ::before as a second layer over the base ::after network.
   On reveal the pulse layer appears at ~65 % then fades to 0 over
   ~1.8 s, leaving only the resting-state elements in the base SVG.  */

@keyframes bc-net-pulse {
  0%   { opacity: 0.65; }
  100% { opacity: 0; }
}

.bc-section[class*="bc-section--net"]::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: -1;
  opacity: 0;
}

/* Trigger pulse when section scrolls into view */
html.bc-home .bc-section[class*="bc-section--net"].bc-reveal--in::before {
  animation: bc-net-pulse 1.8s ease-out 0.2s forwards;
}

/* No pulse if JS hasn't loaded or reduced-motion */
html:not(.bc-reveal-init) .bc-section[class*="bc-section--net"]::before {
  display: none;
}

/* Pulse SVGs per step */
.bc-section--net-1::before {
  background: url('../assets/bg-net-1-pulse.svg') center / cover no-repeat;
}
.bc-section--net-2::before {
  background: url('../assets/bg-net-2-pulse.svg') center / cover no-repeat;
}
.bc-section--net-3::before {
  background: url('../assets/bg-net-3-pulse.svg') center / cover no-repeat;
}
.bc-section--net-4::before {
  background: url('../assets/bg-net-4-pulse.svg') center / cover no-repeat;
}

/* Dark theme: invert the pulse layer too */
[data-md-color-scheme="slate"] .bc-section[class*="bc-section--net"]::before {
  filter: invert(1) brightness(1.1);
}

/* ── Supporters strip (homepage bottom) ── */
.bc-supporters {
  margin-top: 2.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(2, 6, 23, 0.10);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  column-gap: 1.25rem;
  row-gap: 0.25rem;
}

.bc-supporters__copy {
  font-size: 0.72rem;
  line-height: 1.35;
  color: #64748b;
}

.bc-supporters__right {
  justify-self: end;
  display: flex;
  flex-direction: column;
  align-items: flex-start; /* label aligns with logos' left edge */
  gap: 0.35rem;
}

.bc-supporters__label {
  font-size: 0.72rem;
  color: #64748b;
  letter-spacing: 0.02em;
  line-height: 1;
}

.bc-supporters__logos {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.bc-supporters__logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.bc-supporter-logo {
  height: 24px;
  width: auto;
  opacity: 0.9;
  display: inline-block;
}

.bc-supporters__logo--econark .bc-supporter-logo {
  height: 24px;
}

.bc-supporters__logo--sloane .bc-supporter-logo {
  height: 24px;
}

.bc-supporter-logo--dark {
  display: none;
}

@media (max-width: 600px) {
  .bc-supporters {
    grid-template-columns: 1fr;
    align-items: start;
    row-gap: 0.6rem;
  }
  .bc-supporters__right { justify-self: start; }
  .bc-supporter-logo,
  .bc-supporters__logo--econark .bc-supporter-logo,
  .bc-supporters__logo--sloane .bc-supporter-logo {
    height: 20px;
  }
}

[data-md-color-scheme="slate"] .bc-supporters {
  border-top-color: rgba(100, 255, 218, 0.10);
}

[data-md-color-scheme="slate"] .bc-supporters__copy {
  color: #B0BEC5;
}

[data-md-color-scheme="slate"] .bc-supporters__label {
  color: #B0BEC5;
}

[data-md-color-scheme="slate"] .bc-supporter-logo--light {
  display: none;
}

[data-md-color-scheme="slate"] .bc-supporter-logo--dark {
  display: inline-block;
}

/* ═══════════════════════════════════════════════════════════════════
   Notebook pages: keep content narrow with generous side margins,
   even when sidebars are hidden by toggle-sidebar plugin.
   ═══════════════════════════════════════════════════════════════════ */
.jupyter-wrapper {
  max-width: 52rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ═══════════════════════════════════════════════════════════════════
   Notebook typography — QuantEcon-inspired
   Sans-serif body (Source Sans Pro), serif headings (PT Serif),
   monospace code (Source Code Pro). Compact, tighter than defaults.
   ═══════════════════════════════════════════════════════════════════ */
@import url("https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,700;1,400&family=Source+Sans+Pro:ital,wght@0,400;0,600;0,700;1,400&family=Source+Code+Pro:wght@400;500&display=swap");

/* ── Base prose ── */
.jupyter-wrapper {
  font-family: "Source Sans Pro", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--md-default-fg-color);
  -webkit-font-smoothing: antialiased;
}

/* ── Headings ── */
.jupyter-wrapper h1,
.jupyter-wrapper h2,
.jupyter-wrapper h3 {
  font-family: "PT Serif", Georgia, "Times New Roman", serif;
  font-weight: 700;
  line-height: 1.2;
}

.jupyter-wrapper h1 { font-size: 1.35rem; margin: 1.2rem 0 0.6rem; }
.jupyter-wrapper h2 { font-size: 1.1rem; margin: 1.4rem 0 0.5rem; }
.jupyter-wrapper h3 { font-size: 0.95rem; margin: 1.1rem 0 0.4rem; }

.jupyter-wrapper h4,
.jupyter-wrapper h5,
.jupyter-wrapper h6 {
  font-family: "Source Sans Pro", sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  margin: 1rem 0 0.3rem;
}

/* ── Paragraphs & lists ── */
.jupyter-wrapper p {
  margin: 0 0 0.6rem;
}

.jupyter-wrapper li {
  margin: 0.2rem 0;
}

/* ── Inline code ── */
.jupyter-wrapper :not(pre) > code {
  font-family: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8em;
  padding: 0.1em 0.35em;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

[data-md-color-scheme="slate"] .jupyter-wrapper :not(pre) > code {
  background: rgba(100, 255, 218, 0.06);
  border-color: rgba(100, 255, 218, 0.1);
  color: #b2dfdb;
}

/* ── Code cells (input) ── */
.jupyter-wrapper {
  --jp-code-font-family: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, monospace;
  --jp-code-font-size: 12px;
  --jp-code-line-height: 1.45;
}

.jupyter-wrapper pre,
.jupyter-wrapper .highlight pre,
.jupyter-wrapper .jp-InputArea-editor,
.jupyter-wrapper .CodeMirror {
  font-family: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, monospace !important;
  font-size: 12px !important;
  line-height: 1.45 !important;
}

/* ── Code cell chrome ── */
.jupyter-wrapper .jp-Cell {
  margin-bottom: 0.4rem;
}

.jupyter-wrapper .jp-InputPrompt,
.jupyter-wrapper .jp-OutputPrompt {
  font-family: "Source Code Pro", monospace;
  font-size: 11px;
  opacity: 0.4;
  min-width: 4.5em;
}

/* ── Code cell output ── */
.jupyter-wrapper .jp-OutputArea-output pre,
.jupyter-wrapper .jp-RenderedText pre {
  font-family: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, monospace !important;
  font-size: 11.5px !important;
  line-height: 1.4 !important;
}

/* ── Output images (plots) ── */
.jupyter-wrapper .jp-OutputArea-output img {
  display: block;
  margin: 0.4rem auto;
  max-width: 100%;
}

/* ── Tables ── */
.jupyter-wrapper table {
  font-size: 0.78rem;
  border-collapse: collapse;
}

.jupyter-wrapper table th {
  font-weight: 600;
}

.jupyter-wrapper table td,
.jupyter-wrapper table th {
  padding: 0.3rem 0.6rem;
}

/* ── Blockquotes ── */
.jupyter-wrapper blockquote {
  font-size: 0.78rem;
  border-left: 3px solid var(--md-primary-fg-color);
  padding: 0.3rem 0.8rem;
  margin: 0.8rem 0;
}

/* ── Figcaptions ── */
.jupyter-wrapper figcaption {
  font-size: 0.72rem;
  opacity: 0.6;
  margin-top: 0.25rem;
}

/* ── Links ── */
.jupyter-wrapper a {
  text-decoration: none;
}

.jupyter-wrapper a:hover {
  text-decoration: underline;
}

/* ── Strong / em ── */
.jupyter-wrapper strong {
  font-weight: 700;
}

/* ── Dark theme: code cell backgrounds ── */
[data-md-color-scheme="slate"] .jupyter-wrapper .jp-InputArea-editor,
[data-md-color-scheme="slate"] .jupyter-wrapper .highlight {
  background-color: #0d1117 !important;
  border-radius: 4px;
}

[data-md-color-scheme="slate"] .jupyter-wrapper .jp-OutputArea-output pre {
  color: #c9d1d9;
}

/* ═══════════════════════════════════════════════════════════════════
   Notebook callout boxes — styled from [!note]/[!info] blockquotes.
   The mkdocs callouts plugin does NOT process content inside
   jupyter-wrapper, so a small JS transform + these CSS rules
   provide the visual treatment.
   ═══════════════════════════════════════════════════════════════════ */
.jupyter-wrapper .nb-callout {
  border-left: 3px solid;
  border-radius: 4px;
  padding: 0.45rem 0.75rem;
  margin: 0.8rem 0;
  font-size: 0.78rem;
  line-height: 1.5;
}

.jupyter-wrapper .nb-callout .nb-callout__title {
  font-weight: 700;
  margin-bottom: 0.25rem;
  font-size: 0.8rem;
}

.jupyter-wrapper .nb-callout--note {
  border-left-color: #448aff;
  background: rgba(68, 138, 255, 0.06);
}
.jupyter-wrapper .nb-callout--note .nb-callout__title {
  color: #448aff;
}

.jupyter-wrapper .nb-callout--info {
  border-left-color: #00b0ff;
  background: rgba(0, 176, 255, 0.06);
}
.jupyter-wrapper .nb-callout--info .nb-callout__title {
  color: #00b0ff;
}

.jupyter-wrapper .nb-callout--tip {
  border-left-color: #00bfa5;
  background: rgba(0, 191, 165, 0.06);
}
.jupyter-wrapper .nb-callout--tip .nb-callout__title {
  color: #00bfa5;
}

.jupyter-wrapper .nb-callout--warning {
  border-left-color: #ff9100;
  background: rgba(255, 145, 0, 0.06);
}
.jupyter-wrapper .nb-callout--warning .nb-callout__title {
  color: #ff9100;
}

/* Dark theme */
[data-md-color-scheme="slate"] .jupyter-wrapper .nb-callout--note {
  background: rgba(68, 138, 255, 0.08);
}
[data-md-color-scheme="slate"] .jupyter-wrapper .nb-callout--info {
  background: rgba(0, 176, 255, 0.08);
}
[data-md-color-scheme="slate"] .jupyter-wrapper .nb-callout--tip {
  background: rgba(0, 191, 165, 0.08);
}
[data-md-color-scheme="slate"] .jupyter-wrapper .nb-callout--warning {
  background: rgba(255, 145, 0, 0.08);
}

/* ═══════════════════════════════════════════════════════════════════
   Theme-switched images: show light version by default,
   dark version when slate scheme is active.
   Usage in markdown/HTML:
     <img class="nb-plot nb-plot--light" src="plot_light.png">
     <img class="nb-plot nb-plot--dark"  src="plot_dark.png">
   ═══════════════════════════════════════════════════════════════════ */
.nb-plot { max-width: 100%; height: auto; display: block; margin: 0.6rem auto; }
.nb-plot--dark { display: none !important; }
[data-md-color-scheme="slate"] .nb-plot--light { display: none !important; }
[data-md-color-scheme="slate"] .nb-plot--dark  { display: block !important; }

/* Display equations — no boxes, just spacing */
.md-typeset .MathJax_Display,
.md-typeset mjx-container[display="true"] {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  margin: 1.25rem 0;
  overflow-x: auto;
}

/* Keep a slightly tighter rhythm inside card-like containers */
.md-typeset .grid.cards .MathJax_Display,
.md-typeset .grid.cards mjx-container[display="true"],
.md-typeset .bc-card .MathJax_Display,
.md-typeset .bc-card mjx-container[display="true"],
.md-typeset .bc-intro-aside .MathJax_Display,
.md-typeset .bc-intro-aside mjx-container[display="true"] {
  border: 0;
  border-radius: 0;
  padding: 0;
  margin: 0.75rem 0 0;
}

[data-md-color-scheme="slate"] .md-typeset .MathJax_Display,
[data-md-color-scheme="slate"] .md-typeset mjx-container[display="true"] {
  background: transparent;
  border-color: transparent;
}

/* Section dividers — subtler than default hr */
.md-typeset hr {
  border: none;
  border-top: 1px solid #e2e8f0;
  margin: 2.5rem 0;
}

[data-md-color-scheme="slate"] .md-typeset hr {
  border-top-color: rgba(100, 255, 218, 0.08);
}

/* ═══════════════════════════════════════════════════════════════════
   Homepage hero (Material-style full-bleed)
   ═══════════════════════════════════════════════════════════════════ */

/* ── Hero section ── */
.bc-hero {
  background: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  position: relative;
  overflow: hidden;
}

.bc-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  max-width: 1220px;
  margin: 0 auto;
  padding: 3rem 1.2rem 5rem;
}

/* Note: do not zero-out `.md-main` top offset on homepage.
   It can cause the Material tabs/header to be overlapped by the hero. */

.bc-hero__title {
  font: 700 3.2rem/1.1 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: #06111a;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

/* Bold fat T in the hero title */
.bc-hero__T {
  font-weight: 900;
  font-size: 4rem;
  letter-spacing: -0.04em;
  line-height: 0.85;
  vertical-align: baseline;
}

.bc-hero__tagline {
  font: 500 1.25rem/1.4 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: #00897B;
  margin: 0 0 1rem;
}

.bc-hero__sub {
  font-size: 1.05rem;
  line-height: 1.6;
  color: #37474f;
  margin: 0 0 1.8rem;
  max-width: 520px;
}

.bc-hero__buttons {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.6rem;
}

.bc-hero__buttons .md-button {
  font-size: 0.85rem;
  padding: 0.5em 1.4em;
  border: 2px solid #005b8f;
  color: #005b8f;
  background: none;
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.bc-hero__buttons .md-button:hover {
  background: #005b8f;
  color: #ffffff;
}

.bc-hero__buttons .md-button--primary {
  border-color: #f97316;
  color: #f97316;
  background: none;
}

.bc-hero__buttons .md-button--primary:hover {
  background: #f97316;
  color: #ffffff;
}

.bc-hero__buttons .md-button--lightblue {
  border-color: #00aeef;
  color: #00aeef;
}

.bc-hero__buttons .md-button--lightblue:hover {
  background: #00aeef;
  color: #ffffff;
}

/* Small button utility (for dense link rows) */
a.md-button.bc-button--sm {
  font-size: 0.78rem;
  padding: 0.35em 0.9em;
  margin-right: 0.4rem;
  margin-bottom: 0.4rem;
}

.bc-hero__diagram {
  display: flex;
  justify-content: center;
  align-items: center;
}

.bc-adc-svg {
  width: 100%;
  max-width: 648px;
  height: auto;
  /* The diagram is an external SVG loaded via <img>, so theme it via filters. */
  filter: none;
}

[data-md-color-scheme="slate"] .bc-adc-svg {
  /* Make the black-on-transparent SVG visible on dark hero backgrounds. */
  filter: invert(1) brightness(1.05) contrast(0.95);
}

/* ── Hero tabs (inline navigation) ── */
.bc-hero__tabs {
  /* Material may hide .md-tabs outside the header; force visible on homepage. */
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
  /* Keep the top menu visible while scrolling (homepage). */
  background: rgba(255, 255, 255, 0.92) !important;
  backdrop-filter: blur(10px);
  position: sticky;
  top: var(--md-header-height, 0px);
  z-index: 20;
  margin: 0;
  padding: 0.15rem 0;
  /* No separator line on homepage tabs */
  border-bottom: 0;
  box-shadow: none;
}

.bc-hero__tabs .md-tabs__list {
  display: flex !important;
  flex-wrap: wrap;
}

.bc-hero__tabs .md-tabs__link {
  color: #37474f;
  opacity: 0.8;
  font-size: 0.82rem;
}

.bc-hero__tabs .md-tabs__item--active .md-tabs__link {
  color: #00897B;
  opacity: 1;
}

[data-md-color-scheme="slate"] .bc-hero__tabs .md-tabs__link {
  color: #B0BEC5;
}

[data-md-color-scheme="slate"] .bc-hero__tabs .md-tabs__item--active .md-tabs__link {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-hero__tabs {
  background: rgba(26, 26, 46, 0.92) !important;
  border-bottom: 0;
}

/* Homepage only: do not autohide the Material header */
html.bc-home .md-header[data-md-state="hidden"] {
  transform: none !important;
}
html.bc-home .md-header {
  top: 0 !important;
}

@keyframes bc-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ── SVG diagram: math-paper style (black & white) ── */
.bc-dot {
  fill: currentColor;
}

.bc-nd {
  fill: none;
  stroke: #1a1a1a;
  stroke-width: 1.4;
}

.bc-nd-label {
  font: 600 14px "Computer Modern", "Latin Modern", Georgia, "Times New Roman", serif;
  fill: #1a1a1a;
  letter-spacing: 0.3px;
}

.bc-nd-var {
  font: italic 13px "Computer Modern", "Latin Modern", Georgia, "Times New Roman", serif;
  fill: #333333;
}

.bc-arc {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.bc-arc--back {
  fill: none;
  stroke: #1a1a1a;
  stroke-width: 1.2;
  stroke-linecap: round;
}

.bc-arc--fwd {
  fill: none;
  stroke: #1a1a1a;
  stroke-width: 1.2;
  stroke-linecap: round;
}

.bc-edge--line {
  stroke: #1a1a1a;
  stroke-width: 1.35;
  fill: none;
  stroke-linecap: round;
}

.bc-label--it {
  font: italic 12px "Computer Modern", "Latin Modern", Georgia, "Times New Roman", serif;
  fill: #333333;
}

.bc-label--sm {
  font: italic 14px "Computer Modern", "Latin Modern", Georgia, "Times New Roman", serif;
  fill: #1a1a1a;
}

.bc-label--filt {
  font: italic 12px "Computer Modern", "Latin Modern", Georgia, "Times New Roman", serif;
  fill: #555555;
}

.bc-label--eq {
  font: italic 13px "Computer Modern", "Latin Modern", Georgia, "Times New Roman", serif;
  fill: #1a1a1a;
}

.bc-ripple {
  fill: none;
  stroke: #1a1a1a;
  stroke-width: 1.0;
  stroke-dasharray: 4 3;
  stroke-linecap: round;
}

/* ── DARK THEME ── */
[data-md-color-scheme="slate"] .bc-hero {
  background: #1a1a2e;
  min-height: 100vh;
}

[data-md-color-scheme="slate"] .bc-hero__title {
  color: #F3FBFF;
}

[data-md-color-scheme="slate"] .bc-hero__T {
  color: #F3FBFF;
}

[data-md-color-scheme="slate"] .bc-hero__tagline {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-hero__sub {
  color: #B0BEC5;
}

[data-md-color-scheme="slate"] .bc-hero__more {
  color: #64FFDA;
}

[data-md-color-scheme="slate"] .bc-hero__buttons .md-button {
  border-color: #00aeef;
  color: #00aeef;
}
[data-md-color-scheme="slate"] .bc-hero__buttons .md-button:hover {
  background: #00aeef;
  color: #0b1b27;
}
[data-md-color-scheme="slate"] .bc-hero__buttons .md-button--primary {
  border-color: #FCB040;
  color: #FCB040;
}
[data-md-color-scheme="slate"] .bc-hero__buttons .md-button--primary:hover {
  background: #FCB040;
  color: #0b1b27;
}
[data-md-color-scheme="slate"] .bc-hero__buttons .md-button--lightblue {
  border-color: #64FFDA;
  color: #64FFDA;
}
[data-md-color-scheme="slate"] .bc-hero__buttons .md-button--lightblue:hover {
  background: #64FFDA;
  color: #0b1b27;
}

[data-md-color-scheme="slate"] .bc-nd {
  stroke: #d0d0d0;
}

[data-md-color-scheme="slate"] .bc-nd-label {
  fill: #e0e0e0;
}

[data-md-color-scheme="slate"] .bc-nd-var {
  fill: #b0b0b0;
}

[data-md-color-scheme="slate"] .bc-arc--back,
[data-md-color-scheme="slate"] .bc-arc--fwd,
[data-md-color-scheme="slate"] .bc-edge--line {
  stroke: #d0d0d0;
}

[data-md-color-scheme="slate"] .bc-label--it,
[data-md-color-scheme="slate"] .bc-label--sm,
[data-md-color-scheme="slate"] .bc-label--eq {
  fill: #c0c0c0;
}

[data-md-color-scheme="slate"] .bc-label--filt {
  fill: #909090;
}

[data-md-color-scheme="slate"] .bc-ripple {
  stroke: #d0d0d0;
}

/* ── Scroll indicator (pinned to bottom of hero viewport) ── */
.bc-hero__more {
  display: block;
  text-align: center;
  color: #00897B;
  opacity: 0.6;
  animation: bc-bounce 2s ease-in-out infinite;
  cursor: pointer;
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  text-decoration: none;
  border: none;
  transition: opacity 0.2s ease;
}
.bc-hero__more:hover {
  opacity: 1;
}

/* Smooth scrolling for anchor links */
html {
  scroll-behavior: smooth;
}

/* ═══════════════════════════════════════════════════════════════════
   Homepage: delayed (scroll) reveal of sections
   ═══════════════════════════════════════════════════════════════════ */
html.bc-home.bc-reveal-init .md-content__inner > * {
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition:
    opacity 560ms ease,
    transform 560ms cubic-bezier(0.2, 0.65, 0.2, 1);
  transition-delay: var(--bc-reveal-delay, 0ms);
  will-change: opacity, transform;
}

html.bc-home.bc-reveal-init .md-content__inner > *.bc-reveal--in {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
  html.bc-home.bc-reveal-init .md-content__inner > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    pointer-events: auto !important;
  }
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .bc-hero {
    min-height: 100vh;
    min-height: 100dvh; /* dynamic viewport height for mobile browsers */
  }

  .bc-hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 1.5rem 1rem 4rem;
  }

  .bc-hero__sub {
    max-width: 100%;
  }

  .bc-hero__buttons {
    justify-content: center;
  }

  .bc-hero__diagram {
    order: -1;
    max-width: 320px;
    margin: 0 auto;
  }

  .bc-hero__title {
    font-size: 2.4rem;
  }

  .bc-hero__T {
    font-size: 3rem;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   Journey cards (landing page)
   ═══════════════════════════════════════════════════════════════════ */
.bc-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.bc-card {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1.5rem;
  background: #f8fafc;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.bc-card:hover {
  border-color: #00897B;
  box-shadow: 0 4px 12px rgba(0,137,123,0.1);
}

.bc-card strong {
  font-size: 1.05rem;
  color: #06111a;
}

.bc-card p {
  font-size: 0.92rem;
  color: #475569;
  line-height: 1.5;
}

[data-md-color-scheme="slate"] .bc-card {
  background: #1f1f35;
  border-color: rgba(100, 255, 218, 0.1);
}

[data-md-color-scheme="slate"] .bc-card:hover {
  border-color: #64FFDA;
  box-shadow: 0 4px 12px rgba(100,255,218,0.08);
}

[data-md-color-scheme="slate"] .bc-card strong {
  color: #F3FBFF;
}

[data-md-color-scheme="slate"] .bc-card p {
  color: #B0BEC5;
}

@media (max-width: 960px) {
  .bc-cards {
    grid-template-columns: 1fr;
  }
}