/* ==========================================================================
   SCALE Brand Stylesheet — Documentation Theme
   Built for MkDocs Material 9.x
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Brand Tokens
   -------------------------------------------------------------------------- */

:root {
  /* Core palette */
  --scale-dark-violet: #2b1d4f;
  --scale-indigo: #ae84ff;
  --scale-turquoise: #81f4e1;
  --scale-plum: #4e2d73;
  --scale-smoky-white: #f5f5f5;
  --scale-smoky-black: #18161f;
  --scale-red: #b82636;
  --scale-green: #00916c;

  /* Derived tokens */
  --scale-dark-violet-deep: #1f1439;
  --scale-radius: 8px;
  --scale-spacing-lg: 2rem;
  --scale-spacing-md: 1.2rem;
}

/* --------------------------------------------------------------------------
   2. Light Mode (default) — Material Token Overrides
   -------------------------------------------------------------------------- */

:root,
[data-md-color-scheme="default"] {
  /* Primary chrome */
  --md-primary-fg-color: var(--scale-dark-violet);
  --md-primary-fg-color--light: var(--scale-plum);
  --md-primary-fg-color--dark: var(--scale-dark-violet-deep);
  --md-primary-bg-color: #ffffff;

  /* Accent — turquoise for interactions only */
  --md-accent-fg-color: var(--scale-turquoise);
  --md-accent-fg-color--transparent: rgba(129, 244, 225, 0.1);

  /* Page surfaces */
  --md-default-bg-color: var(--scale-smoky-white);
  --md-default-fg-color: var(--scale-smoky-black);
  --md-default-fg-color--light: #45424d;
  --md-default-fg-color--lighter: #6b6775;
  --md-default-fg-color--lightest: #a09da8;

  /* Links */
  --md-typeset-a-color: var(--scale-plum);

  /* Code */
  --md-code-bg-color: var(--scale-dark-violet);
  --md-code-fg-color: #e8e2f4;
  --md-code-hl-color: rgba(174, 132, 255, 0.15);

  /* Footer */
  --md-footer-bg-color: var(--scale-dark-violet);
  --md-footer-bg-color--dark: var(--scale-dark-violet-deep);
  --md-footer-fg-color: #f5f5f5;
  --md-footer-fg-color--light: rgba(245, 245, 245, 0.7);
  --md-footer-fg-color--lighter: rgba(245, 245, 245, 0.5);
}

/* --------------------------------------------------------------------------
   3. Dark Mode (slate) — Material Token Overrides
   -------------------------------------------------------------------------- */

[data-md-color-scheme="slate"] {
  /* Page surfaces */
  --md-default-bg-color: var(--scale-dark-violet-deep);
  --md-default-fg-color: #f5f5f5;
  --md-default-fg-color--light: #d4d0dc;
  --md-default-fg-color--lighter: #a49daf;
  --md-default-fg-color--lightest: #7a748a;

  /* Primary chrome */
  --md-primary-fg-color: var(--scale-dark-violet);
  --md-primary-fg-color--light: var(--scale-plum);
  --md-primary-fg-color--dark: #160e2e;
  --md-primary-bg-color: #f5f5f5;

  /* Accent */
  --md-accent-fg-color: var(--scale-turquoise);
  --md-accent-fg-color--transparent: rgba(129, 244, 225, 0.08);

  /* Links */
  --md-typeset-a-color: var(--scale-turquoise);

  /* Code */
  --md-code-bg-color: #160e2e;
  --md-code-fg-color: #e8e2f4;
  --md-code-hl-color: rgba(174, 132, 255, 0.2);
  --md-code-hl-comment-color: #9f97b2;

  /* Footer */
  --md-footer-bg-color: var(--scale-dark-violet);
  --md-footer-bg-color--dark: #160e2e;
  --md-footer-fg-color: #f5f5f5;
  --md-footer-fg-color--light: rgba(245, 245, 245, 0.7);
  --md-footer-fg-color--lighter: rgba(245, 245, 245, 0.5);
}

/* Keep light-mode code tokens readable against the dark branded code surface */
[data-md-color-scheme="default"] {
  --md-code-fg-color: #f2ecff;
  --md-code-hl-color--light: rgba(174, 132, 255, 0.25);
  --md-code-hl-number-color: #ff9d8f;
  --md-code-hl-special-color: #ff75b1;
  --md-code-hl-function-color: #e7a1ff;
  --md-code-hl-constant-color: #c0adff;
  --md-code-hl-keyword-color: #8db4ff;
  --md-code-hl-string-color: #6adbb0;
  --md-code-hl-name-color: var(--md-code-fg-color);
  --md-code-hl-operator-color: #cfc4e4;
  --md-code-hl-punctuation-color: #cfc4e4;
  --md-code-hl-comment-color: #b8accf;
  --md-code-hl-generic-color: #cfc4e4;
  --md-code-hl-variable-color: #cfc4e4;
}

/* --------------------------------------------------------------------------
   4. Typography — Brand Hierarchy
   -------------------------------------------------------------------------- */

/* Headings: Lato 800 — authoritative, technical */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-family: "Lato", sans-serif;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.md-typeset h1 {
  margin-bottom: 0.8rem;
  color: var(--scale-dark-violet);
}

.md-typeset h2,
.md-typeset h3 {
  margin-top: var(--scale-spacing-lg);
}

/* Body / subheadings: Inter */
.md-typeset h4,
.md-typeset h5,
.md-typeset h6,
.md-typeset {
  font-family: "Inter", sans-serif;
}

/* Code: JetBrains Mono */
.md-typeset code,
.md-typeset pre code,
.md-typeset kbd {
  font-family: "JetBrains Mono", monospace;
}

/* H2 — no decorative underline */
.md-typeset h2 {
  border-bottom: none;
  padding-bottom: 0;
}

/* Dark mode h1 colour */
[data-md-color-scheme="slate"] .md-typeset h1 {
  color: #f5f5f5;
}

/* Increase vertical rhythm */
.md-typeset p,
.md-typeset ul,
.md-typeset ol {
  margin-bottom: var(--scale-spacing-md);
}

/* --------------------------------------------------------------------------
   4b. Body Links — Accessible, Underlined by Default
   -------------------------------------------------------------------------- */

/* Links in body content get underlines for accessibility */
.md-typeset
  a:not(.md-button):not(.md-nav__link):not(.md-footer__link):not(
    .md-header__button
  ):not(.md-logo):not(.md-tabs__link):not(.headerlink):not(h1 > a):not(
    h2 > a
  ):not(h3 > a):not(h4 > a):not(h5 > a):not(h6 > a) {
  text-decoration: underline;
  text-decoration-color: currentColor;
  text-underline-offset: 0.15em;
  transition:
    color 0.15s ease,
    text-decoration-color 0.15s ease;
}

.md-typeset
  a:not(.md-button):not(.md-nav__link):not(.md-footer__link):not(
    .md-header__button
  ):not(.md-logo):not(.md-tabs__link):not(.headerlink):not(h1 > a):not(
    h2 > a
  ):not(h3 > a):not(h4 > a):not(h5 > a):not(h6 > a):hover,
.md-typeset
  a:not(.md-button):not(.md-nav__link):not(.md-footer__link):not(
    .md-header__button
  ):not(.md-logo):not(.md-tabs__link):not(.headerlink):not(h1 > a):not(
    h2 > a
  ):not(h3 > a):not(h4 > a):not(h5 > a):not(h6 > a):active {
  text-decoration: none;
}

/* Light mode: darken link hover to plum for legibility */
[data-md-color-scheme="default"]
  .md-typeset
  a:not(.md-button):not(.md-nav__link):not(.md-footer__link):not(
    .md-header__button
  ):not(.md-logo):not(.md-tabs__link):not(.headerlink):not(h1 > a):not(
    h2 > a
  ):not(h3 > a):not(h4 > a):not(h5 > a):not(h6 > a):hover {
  color: var(--scale-dark-violet);
}

/* Dark mode: lighten link hover to indigo for legibility */
[data-md-color-scheme="slate"]
  .md-typeset
  a:not(.md-button):not(.md-nav__link):not(.md-footer__link):not(
    .md-header__button
  ):not(.md-logo):not(.md-tabs__link):not(.headerlink):not(h1 > a):not(
    h2 > a
  ):not(h3 > a):not(h4 > a):not(h5 > a):not(h6 > a):hover {
  color: var(--scale-indigo);
}

/* Light mode: permalink hover/active states use brand indigo */
[data-md-color-scheme="default"] .md-typeset .headerlink:hover,
[data-md-color-scheme="default"] .md-typeset .headerlink:focus,
[data-md-color-scheme="default"] .md-typeset .headerlink:active,
[data-md-color-scheme="default"] .md-typeset :hover > .headerlink,
[data-md-color-scheme="default"] .md-typeset :target > .headerlink {
  color: var(--scale-indigo);
}

/* --------------------------------------------------------------------------
   4c. Tab Switcher Labels — Remove Underlines
   -------------------------------------------------------------------------- */

.md-typeset .tabbed-labels > label,
.md-typeset .tabbed-labels > label > a {
  text-decoration: none !important;
  border-bottom-color: transparent;
}

/* --------------------------------------------------------------------------
   5. Navigation & Sidebar
   -------------------------------------------------------------------------- */

/* Sidebar — match page background */
.md-sidebar,
.md-sidebar__scrollwrap,
.md-sidebar__inner {
  background-color: var(--md-default-bg-color);
  box-shadow: none;
}

.md-nav,
.md-nav__list,
.md-nav__title {
  background: transparent;
  box-shadow: none;
}

.md-nav__link {
  color: var(--md-default-fg-color);
  transition: color 0.15s ease;
}

.md-nav__link--active {
  color: var(--scale-dark-violet);
  font-weight: 600;
}

.md-nav__link:hover,
.md-nav__link:focus {
  color: var(--scale-plum) !important;
}

/* Override Material's accent-based hover on nav items in light mode */
[data-md-color-scheme="default"] .md-nav__link:hover,
[data-md-color-scheme="default"] .md-nav__link:focus,
[data-md-color-scheme="default"] .md-nav__item:hover > .md-nav__link {
  color: var(--scale-plum) !important;
}

.md-nav--primary > .md-nav__title,
.md-nav--secondary > .md-nav__title {
  color: var(--md-default-fg-color);
}

/* Desktop sidebar resets — remove Material's painted title bars (except TOC heading) */
@media screen and (min-width: 76.25em) {
  .md-sidebar .md-nav--primary > .md-nav__title,
  .md-sidebar .md-nav__title,
  .md-sidebar .md-nav__title[for],
  .md-sidebar .md-nav__title[for="__drawer"] {
    background: transparent !important;
    box-shadow: none !important;
    border: 0 !important;
  }

  .md-sidebar .md-nav--primary .md-nav__title[for="__drawer"],
  .md-sidebar .md-nav--primary .md-nav__title[for="__toc"] {
    background-color: transparent !important;
    box-shadow: none !important;
    border: 0 !important;
  }

  .md-sidebar .md-nav--primary .md-nav__list,
  .md-sidebar .md-nav--secondary .md-nav__list,
  .md-sidebar .md-nav__title ~ .md-nav__list {
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    border-top: 0 !important;
  }

  .md-sidebar .md-nav--primary > .md-nav__title ~ .md-nav__list,
  .md-sidebar .md-nav--secondary > .md-nav__title ~ .md-nav__list {
    background: transparent !important;
    box-shadow: none !important;
    border-top: 0 !important;
  }
}

/* Dark mode sidebar — match page bg */
[data-md-color-scheme="slate"] .md-sidebar,
[data-md-color-scheme="slate"] .md-sidebar__scrollwrap,
[data-md-color-scheme="slate"] .md-sidebar__inner {
  background-color: var(--md-default-bg-color) !important;
  box-shadow: none !important;
}

[data-md-color-scheme="slate"] .md-nav,
[data-md-color-scheme="slate"] .md-nav__list,
[data-md-color-scheme="slate"] .md-nav__title {
  background: transparent !important;
  background-color: transparent !important;
  box-shadow: none !important;
}

[data-md-color-scheme="slate"] .md-nav--primary > .md-nav__title {
  color: #f5f5f5;
  background: transparent !important;
  background-color: transparent !important;
  box-shadow: none !important;
}

[data-md-color-scheme="slate"] .md-nav--secondary > .md-nav__title {
  color: #f5f5f5;
  box-shadow: none !important;
}

[data-md-color-scheme="slate"] .md-nav__link {
  color: #f5f5f5;
}

[data-md-color-scheme="slate"] .md-nav__link--active {
  color: var(--scale-turquoise);
  font-weight: 600;
}

[data-md-color-scheme="slate"] .md-nav__link:hover,
[data-md-color-scheme="slate"] .md-nav__link:focus,
[data-md-color-scheme="slate"] .md-nav__item:hover > .md-nav__link {
  color: var(--scale-indigo) !important;
}

[data-md-color-scheme="slate"] .md-sidebar .md-nav__list,
[data-md-color-scheme="slate"] .md-sidebar .md-nav--primary .md-nav__list,
[data-md-color-scheme="slate"] .md-sidebar .md-nav--secondary .md-nav__list,
[data-md-color-scheme="slate"]
  .md-sidebar
  .md-nav__item--section
  > .md-nav__link,
[data-md-color-scheme="slate"]
  .md-sidebar
  .md-nav__item--nested
  > .md-nav__link,
[data-md-color-scheme="slate"]
  .md-sidebar
  .md-nav__item--section
  > .md-nav__link
  > .md-ellipsis,
[data-md-color-scheme="slate"]
  .md-sidebar
  .md-nav__item--nested
  > .md-nav__link
  > .md-ellipsis {
  background: transparent !important;
  background-color: transparent !important;
  box-shadow: none !important;
}

@media screen and (min-width: 76.25em) {
  [data-md-color-scheme="slate"] .md-sidebar .md-nav--primary .md-nav__title,
  [data-md-color-scheme="slate"] .md-sidebar .md-nav__title,
  [data-md-color-scheme="slate"] .md-sidebar .md-nav__title[for],
  [data-md-color-scheme="slate"] .md-sidebar .md-nav__title[for="__drawer"] {
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    border: 0 !important;
  }

  [data-md-color-scheme="slate"] .md-sidebar .md-nav--primary .md-nav__list,
  [data-md-color-scheme="slate"] .md-sidebar .md-nav--secondary .md-nav__list,
  [data-md-color-scheme="slate"] .md-sidebar .md-nav__title ~ .md-nav__list {
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    border-top: 0 !important;
  }
}

/* Nuclear reset — catch remaining Material background paints on sidebar in dark mode
   (excludes TOC heading which needs an opaque bg for sticky overlap prevention) */
[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav__title,
[data-md-color-scheme="slate"] .md-nav__title[for="__drawer"] {
  background: transparent !important;
  background-color: transparent !important;
  box-shadow: none !important;
  border: 0 !important;
}

/* --------------------------------------------------------------------------
   6. Tabs — Navigation Tabs (new feature)
   -------------------------------------------------------------------------- */

.md-tabs {
  background-color: var(--scale-dark-violet);
  box-shadow: none;
}

.md-tabs__link {
  color: rgba(245, 245, 245, 0.7);
  transition: color 0.15s ease;
}

.md-tabs__link--active,
.md-tabs__link:hover {
  color: #f5f5f5;
}

/* --------------------------------------------------------------------------
   7. Code Blocks — Premium Technical Feel
   -------------------------------------------------------------------------- */

.md-typeset pre {
  background-color: var(--md-code-bg-color);
  border-radius: var(--scale-radius);
  box-shadow: none;
}

.md-typeset code {
  border-radius: 4px;
}

/* Light mode: keep code copy icon legible when code blocks are hovered */
[data-md-color-scheme="default"] .md-typeset pre > .md-clipboard,
[data-md-color-scheme="default"] .md-typeset .highlight > .md-clipboard {
  color: #d8cfee;
}

[data-md-color-scheme="default"] .md-typeset pre:hover > .md-clipboard,
[data-md-color-scheme="default"] .md-typeset .highlight:hover > .md-clipboard {
  color: #f2ecff;
}

[data-md-color-scheme="default"] .md-typeset pre > .md-clipboard:hover,
[data-md-color-scheme="default"] .md-typeset pre > .md-clipboard:focus,
[data-md-color-scheme="default"] .md-typeset .highlight > .md-clipboard:hover,
[data-md-color-scheme="default"] .md-typeset .highlight > .md-clipboard:focus {
  color: var(--scale-turquoise);
}

/* Inline code in paragraphs */
.md-typeset :not(pre) > code {
  background-color: rgba(43, 29, 79, 0.08);
  color: var(--scale-plum);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
}

[data-md-color-scheme="slate"] .md-typeset :not(pre) > code {
  background-color: rgba(174, 132, 255, 0.12);
  color: var(--scale-indigo);
}

/* --------------------------------------------------------------------------
   8. Admonitions — Mapped to Brand System Colours
   -------------------------------------------------------------------------- */

.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--scale-radius);
  box-shadow: none;
  border: none;
  border-left: 4px solid var(--md-accent-fg-color);
}

.md-typeset .admonition.note,
.md-typeset details.note {
  border-left-color: var(--scale-turquoise);
}

.md-typeset .admonition.tip,
.md-typeset details.tip,
.md-typeset .admonition.hint,
.md-typeset details.hint {
  border-left-color: var(--scale-turquoise);
}

.md-typeset .admonition.warning,
.md-typeset details.warning,
.md-typeset .admonition.caution,
.md-typeset details.caution {
  border-left-color: var(--scale-red);
}

.md-typeset .admonition.danger,
.md-typeset details.danger,
.md-typeset .admonition.failure,
.md-typeset details.failure,
.md-typeset .admonition.bug,
.md-typeset details.bug {
  border-left-color: var(--scale-red);
}

.md-typeset .admonition.success,
.md-typeset details.success,
.md-typeset .admonition.check,
.md-typeset details.check,
.md-typeset .admonition.done,
.md-typeset details.done {
  border-left-color: var(--scale-green);
}

.md-typeset .admonition.info,
.md-typeset details.info,
.md-typeset .admonition.todo,
.md-typeset details.todo {
  border-left-color: var(--scale-indigo);
}

.md-typeset .admonition.example,
.md-typeset details.example {
  border-left-color: var(--scale-plum);
}

.md-typeset .admonition.abstract,
.md-typeset details.abstract,
.md-typeset .admonition.summary,
.md-typeset details.summary {
  border-left-color: var(--scale-indigo);
}

.md-typeset .admonition.question,
.md-typeset details.question,
.md-typeset .admonition.faq,
.md-typeset details.faq {
  border-left-color: var(--scale-turquoise);
}

.md-typeset .admonition.quote,
.md-typeset details.quote,
.md-typeset .admonition.cite,
.md-typeset details.cite {
  border-left-color: var(--scale-plum);
}

/* --------------------------------------------------------------------------
   9. Buttons — Turquoise = Interaction
   -------------------------------------------------------------------------- */

.md-button--primary,
.md-typeset .md-button--primary {
  background-color: var(--scale-turquoise);
  color: var(--scale-dark-violet);
  border: none;
  border-radius: var(--scale-radius);
  font-weight: 600;
  transition:
    background-color 0.15s ease,
    transform 0.1s ease;
}

.md-button--primary:hover,
.md-typeset .md-button--primary:hover {
  background-color: #6cdfc9;
  transform: translateY(-1px);
}

.md-button--primary:active,
.md-typeset .md-button--primary:active {
  transform: translateY(0);
}

/* Consent banner secondary action should match primary button shape/weight
   while remaining visually secondary with clear contrast. */
:root,
[data-md-color-scheme="default"] {
  --scale-consent-secondary-fg: var(--scale-dark-violet);
  --scale-consent-secondary-border: rgba(43, 29, 79, 0.55);
  --scale-consent-secondary-bg: rgba(43, 29, 79, 0.08);
  --scale-consent-secondary-bg-hover: rgba(43, 29, 79, 0.14);
}

[data-md-color-scheme="slate"] {
  --scale-consent-secondary-fg: #d3fff9;
  --scale-consent-secondary-border: rgba(129, 244, 225, 0.65);
  --scale-consent-secondary-bg: rgba(129, 244, 225, 0.12);
  --scale-consent-secondary-bg-hover: rgba(129, 244, 225, 0.2);
}

.md-consent__controls .md-button {
  border-radius: var(--scale-radius);
  font-weight: 600;
}

.md-consent__controls label.md-button[for="__settings"] {
  background-color: var(--scale-consent-secondary-bg);
  border: 0.1rem solid var(--scale-consent-secondary-border);
  color: var(--scale-consent-secondary-fg);
  transition:
    background-color 0.15s ease,
    border-color 0.15s ease,
    transform 0.1s ease;
}

.md-consent__controls label.md-button[for="__settings"]:hover,
.md-consent__controls label.md-button[for="__settings"]:focus-visible {
  background-color: var(--scale-consent-secondary-bg-hover);
  border-color: var(--scale-consent-secondary-fg);
  color: var(--scale-consent-secondary-fg);
  transform: translateY(-1px);
}

.md-consent__controls label.md-button[for="__settings"]:active {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   10. Header
   -------------------------------------------------------------------------- */

.md-header {
  background-color: var(--scale-dark-violet);
  box-shadow: none;
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */

.md-footer {
  box-shadow: none;
}

.md-footer-meta {
  background-color: var(--scale-dark-violet);
}

.md-footer-meta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

/* Remove underlines from footer links */
.md-footer a,
.md-footer-meta a,
.md-footer__link,
.md-footer-meta__inner a {
  text-decoration: none !important;
}

/* --------------------------------------------------------------------------
   12. Search
   -------------------------------------------------------------------------- */

.md-search__form {
  border-radius: var(--scale-radius);
  box-shadow: none;
}

/* --------------------------------------------------------------------------
   14. Tables
   -------------------------------------------------------------------------- */

.md-typeset table:not([class]) {
  border-radius: var(--scale-radius);
  overflow: hidden;
  box-shadow: none;
}

.md-typeset table:not([class]) th {
  background-color: var(--scale-dark-violet);
  color: #f5f5f5;
  font-family: "Lato", sans-serif;
  font-weight: 700;
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background-color: rgba(174, 132, 255, 0.15);
  color: #f5f5f5;
}

/* --------------------------------------------------------------------------
   15. Back-to-Top Button
   -------------------------------------------------------------------------- */

.md-top {
  background-color: var(--scale-dark-violet);
  color: #f5f5f5;
  border-radius: var(--scale-radius);
  box-shadow: none;
}

.md-top:hover {
  background-color: var(--scale-plum);
}

/* --------------------------------------------------------------------------
   16. General Craft Details
   --------------------------------------------------------------------------
   - Consistent radius
   - No decorative gradients
   - No unnecessary box shadows
   - Aligned to grid
   -------------------------------------------------------------------------- */

.md-typeset hr {
  border-color: rgba(43, 29, 79, 0.12);
}

[data-md-color-scheme="slate"] .md-typeset hr {
  border-color: rgba(174, 132, 255, 0.2);
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

/* Selection colour */
::selection {
  background-color: rgba(174, 132, 255, 0.3);
  color: inherit;
}

/* Focus rings — accessible, on-brand */
:focus-visible {
  outline: 2px solid var(--scale-turquoise);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   17. TOC Scrollbar — Indigo instead of aqua
   -------------------------------------------------------------------------- */

.md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover {
  background-color: var(--scale-indigo) !important;
}

.md-sidebar__scrollwrap::-webkit-scrollbar-thumb {
  background-color: rgba(174, 132, 255, 0.3);
}

.md-sidebar__scrollwrap {
  scrollbar-color: rgba(174, 132, 255, 0.3) transparent;
}

.md-sidebar__scrollwrap:hover {
  scrollbar-color: var(--scale-indigo) transparent;
}

/* --------------------------------------------------------------------------
   18. Sidebar Header Overlap Fix
   -------------------------------------------------------------------------- */

.md-sidebar--secondary .md-nav--secondary > .md-nav__title {
  position: sticky;
  top: 0;
  z-index: 2;
  background-color: var(--md-default-bg-color) !important;
  background: var(--md-default-bg-color) !important;
  padding-bottom: 0.4rem;
}

[data-md-color-scheme="slate"]
  .md-sidebar--secondary
  .md-nav--secondary
  > .md-nav__title {
  background-color: var(--md-default-bg-color) !important;
  background: var(--md-default-bg-color) !important;
}

/* Primary (left) sidebar — same sticky-header overlap fix */
.md-sidebar--primary .md-nav--primary > .md-nav__title {
  position: sticky;
  top: 0;
  z-index: 2;
  background-color: var(--md-default-bg-color) !important;
  background: var(--md-default-bg-color) !important;
  padding-bottom: 0.4rem;
}

/* Light mode: keep sticky sidebar headers/active rows fully opaque while scrolling */
[data-md-color-scheme="default"]
  .md-sidebar--secondary
  .md-nav--secondary
  > .md-nav__title,
[data-md-color-scheme="default"]
  .md-sidebar--primary
  .md-nav--primary
  > .md-nav__title,
[data-md-color-scheme="default"]
  .md-sidebar--primary
  .md-nav--lifted
  > .md-nav__list
  > .md-nav__item--active
  > .md-nav__link {
  background-color: var(--md-default-bg-color) !important;
  background: var(--md-default-bg-color) !important;
  box-shadow: 0 0 0.4rem 0.4rem var(--md-default-bg-color) !important;
}

[data-md-color-scheme="default"]
  .md-sidebar--primary
  .md-nav--primary
  > .md-nav__title,
[data-md-color-scheme="default"]
  .md-sidebar--primary
  .md-nav--lifted
  > .md-nav__list
  > .md-nav__item--active
  > .md-nav__link {
  z-index: 3;
}

[data-md-color-scheme="default"]
  .md-sidebar--primary
  .md-nav--primary
  > .md-nav__title::before,
[data-md-color-scheme="default"]
  .md-sidebar--primary
  .md-nav--lifted
  > .md-nav__list
  > .md-nav__item--active
  > .md-nav__link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--md-default-bg-color);
  z-index: -1;
}

[data-md-color-scheme="slate"]
  .md-sidebar--primary
  .md-nav--primary
  > .md-nav__title {
  background-color: var(--md-default-bg-color) !important;
  background: var(--md-default-bg-color) !important;
}

/* Lifted nav (left sidebar) — restore opaque sticky heading for the active section
   so it masks items scrolling behind it, matching how the TOC heading behaves. */
.md-nav--lifted > .md-nav__list > .md-nav__item--active > .md-nav__link {
  background: var(--md-default-bg-color) !important;
  box-shadow: 0 0 0.4rem 0.4rem var(--md-default-bg-color) !important;
}

[data-md-color-scheme="slate"]
  .md-nav--lifted
  > .md-nav__list
  > .md-nav__item--active
  > .md-nav__link {
  background: var(--md-default-bg-color) !important;
  box-shadow: 0 0 0.4rem 0.4rem var(--md-default-bg-color) !important;
}

/* --------------------------------------------------------------------------
   19. Mobile Drawer Integrity
   --------------------------------------------------------------------------
   Material's mobile "lifted" nav stacks/animates nested lists as layered
   panes. The desktop transparency/sticky treatments above make those panes
   visually overlap on small screens, so reset them for the drawer.
   -------------------------------------------------------------------------- */

@media screen and (max-width: 76.234375em) {
  .md-sidebar--primary,
  .md-sidebar--primary .md-sidebar__scrollwrap,
  .md-sidebar--primary .md-sidebar__inner,
  .md-sidebar--primary .md-nav,
  .md-sidebar--primary .md-nav__list,
  .md-sidebar--primary .md-nav__title {
    background-color: var(--md-default-bg-color) !important;
    background: var(--md-default-bg-color) !important;
    box-shadow: none !important;
  }

  .md-sidebar--primary .md-nav--primary > .md-nav__title,
  .md-sidebar--primary .md-nav--secondary > .md-nav__title,
  .md-sidebar--primary
    .md-nav--lifted
    > .md-nav__list
    > .md-nav__item--active
    > .md-nav__link {
    position: static !important;
    top: auto !important;
    z-index: auto !important;
    padding-bottom: 0 !important;
    box-shadow: none !important;
  }

  [data-md-color-scheme="default"]
    .md-sidebar--primary
    .md-nav--primary
    > .md-nav__title::before,
  [data-md-color-scheme="default"]
    .md-sidebar--primary
    .md-nav--lifted
    > .md-nav__list
    > .md-nav__item--active
    > .md-nav__link::before {
    content: none;
  }

  [data-md-color-scheme="default"] .md-sidebar--primary .md-nav__title {
    color: var(--md-default-fg-color) !important;
  }

  [data-md-color-scheme="default"]
    .md-sidebar--primary
    .md-nav--primary
    > .md-nav__title[for="__drawer"] {
    background-color: var(--scale-dark-violet) !important;
    background: var(--scale-dark-violet) !important;
    color: #f5f5f5 !important;
  }
}