/* ==========================================================================
   ZEN.CSS — MkDocs Material Theme Override
   Source of truth: docs/zen-system/colours.md (until migrated)
   Replaces retro-neon.css. Maps Zen tokens onto Material's --md-* variables.

   PHILOSOPHY (Zen guardrails):
   - One accent: indigo (#6366F1 light / #818CF8 dark). No per-section colours.
   - No gradients, no glows, no text-shadow, no backdrop-filter.
   - All transitions ≤200ms ease-out, only on transform/opacity/colour/border.
   - 8px spacing grid. No arbitrary values.
   - Light by default. Dark via Material's palette.toggle (data-md-color-scheme="slate").
   - Border-only differentiation, never background fills for active/hover.
   ========================================================================== */

/* --- Zen tokens, defined on both schemes ---------------------------------- */

:root,
[data-md-color-scheme="default"] {
  /* Backgrounds */
  --zen-bg-page:       #FAFAFA;
  --zen-bg-surface:    #FFFFFF;
  --zen-bg-elevated:   #F5F5F5;

  /* Text */
  --zen-text-primary:    #1A1A1A;
  --zen-text-secondary:  #404040;
  --zen-text-tertiary:   #737373;
  --zen-text-muted:      #A3A3A3;

  /* Borders */
  --zen-border:           #E5E5E5;
  --zen-border-emphasis:  #D4D4D4;

  /* Accent */
  --zen-accent:          #6366F1;
  --zen-accent-hover:    #4F46E5;
  --zen-accent-subtle:   #EEF2FF;

  /* Semantic */
  --zen-success: #22C55E;
  --zen-warning: #EAB308;
  --zen-error:   #EF4444;
  --zen-info:    #60A5FA;
  --zen-teal:    #14B8A6;

  /* Code */
  --zen-code-bg:   #F5F5F5;
  --zen-code-text: #1A1A1A;
}

[data-md-color-scheme="slate"] {
  --zen-bg-page:       #0A0A0A;
  --zen-bg-surface:    #141414;
  --zen-bg-elevated:   #1A1A1A;

  --zen-text-primary:    #F5F5F5;
  --zen-text-secondary:  #D4D4D4;
  --zen-text-tertiary:   #A3A3A3;
  --zen-text-muted:      #737373;

  --zen-border:           #262626;
  --zen-border-emphasis:  #404040;

  --zen-accent:          #818CF8;
  --zen-accent-hover:    #6366F1;
  --zen-accent-subtle:   rgba(99, 102, 241, 0.12);

  --zen-success: #4ADE80;
  --zen-warning: #FACC15;
  --zen-error:   #F87171;
  --zen-info:    #93C5FD;
  --zen-teal:    #5EEAD4;

  --zen-code-bg:   #141414;
  --zen-code-text: #F5F5F5;
}

/* --- Map onto Material's --md-* variables --------------------------------- */

[data-md-color-scheme="default"],
[data-md-color-scheme="slate"] {
  --md-default-bg-color:           var(--zen-bg-page);
  --md-default-fg-color:           var(--zen-text-secondary);
  --md-default-fg-color--light:    var(--zen-text-tertiary);
  --md-default-fg-color--lighter:  var(--zen-text-muted);
  --md-default-fg-color--lightest: var(--zen-border);

  --md-primary-fg-color:        var(--zen-bg-page);
  --md-primary-fg-color--light: var(--zen-bg-surface);
  --md-primary-fg-color--dark:  var(--zen-bg-elevated);
  --md-primary-bg-color:        var(--zen-text-primary);
  --md-primary-bg-color--light: var(--zen-text-secondary);

  --md-accent-fg-color:              var(--zen-accent);
  --md-accent-fg-color--transparent: var(--zen-accent-subtle);
  --md-accent-bg-color:              var(--zen-bg-page);
  --md-accent-bg-color--light:       var(--zen-bg-surface);

  --md-typeset-color:        var(--zen-text-secondary);
  --md-typeset-a-color:      var(--zen-accent);
  --md-typeset-mark-color:   var(--zen-accent-subtle);

  --md-code-bg-color: var(--zen-code-bg);
  --md-code-fg-color: var(--zen-code-text);

  --md-footer-bg-color:        var(--zen-bg-elevated);
  --md-footer-bg-color--dark:  var(--zen-bg-elevated);
  --md-footer-fg-color:        var(--zen-text-tertiary);
  --md-footer-fg-color--light: var(--zen-text-tertiary);
  --md-footer-fg-color--lighter: var(--zen-text-muted);

  --md-shadow-z1: 0 1px 2px rgba(0, 0, 0, 0.04);
  --md-shadow-z2: 0 2px 4px rgba(0, 0, 0, 0.06);
  --md-shadow-z3: 0 4px 8px rgba(0, 0, 0, 0.08);
}

/* --- Body & layout -------------------------------------------------------- */

body {
  background-color: var(--zen-bg-page);
  color: var(--zen-text-secondary);
}

.md-main,
.md-content {
  background-color: var(--zen-bg-page);
}

.md-content__inner {
  margin-bottom: 4rem;
  max-width: 1080px;
}

@media screen and (min-width: 76.25em) {
  .md-grid {
    max-width: 76rem;
  }
}

/* --- Typography ----------------------------------------------------------- */

.md-typeset {
  color: var(--zen-text-secondary);
  font-family: var(--md-text-font, "Inter"), system-ui, -apple-system, sans-serif;
  font-size: 0.78rem;
  line-height: 1.7;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  color: var(--zen-text-primary);
  font-family: var(--md-text-font, "Inter"), system-ui, -apple-system, sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-shadow: none;
}

.md-typeset h1 {
  font-size: 2rem;
  line-height: 1.25;
  margin: 0 0 1.25rem;
  border-bottom: none;
  padding-bottom: 0;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.md-typeset h2 {
  font-size: 1.4rem;
  line-height: 1.3;
  margin: 2.5rem 0 1rem;
  border-bottom: 1px solid var(--zen-border);
  padding-bottom: 0.4rem;
  font-weight: 650;
}

.md-typeset h3 {
  font-size: 1.1rem;
  line-height: 1.4;
  margin: 2rem 0 0.75rem;
  font-weight: 600;
}

.md-typeset h4 {
  font-size: 0.95rem;
  margin: 1.5rem 0 0.5rem;
  font-weight: 600;
  font-style: normal;
}

.md-typeset h5,
.md-typeset h6 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--zen-text-tertiary);
  text-transform: none;
}

.md-typeset p {
  color: var(--zen-text-secondary);
  margin: 0 0 1rem;
}

.md-typeset strong {
  color: var(--zen-text-primary);
  font-weight: 600;
}

.md-typeset em {
  color: var(--zen-text-secondary);
  font-style: italic;
}

/* --- Links ---------------------------------------------------------------- */

.md-typeset a {
  color: var(--zen-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms ease-out, border-color 200ms ease-out;
}

.md-typeset a:hover,
.md-typeset a:focus {
  color: var(--zen-accent-hover);
  border-bottom-color: var(--zen-accent-hover);
  text-shadow: none;
}

[data-md-color-scheme="slate"] .md-typeset a:hover,
[data-md-color-scheme="slate"] .md-typeset a:focus {
  color: var(--zen-accent);
  border-bottom-color: var(--zen-accent);
}

/* --- Top header ----------------------------------------------------------- */

.md-header {
  background-color: var(--zen-bg-surface);
  color: var(--zen-text-primary);
  border-bottom: 1px solid var(--zen-border);
  box-shadow: none;
  backdrop-filter: none;
}

.md-header[data-md-state="shadow"] {
  box-shadow: 0 1px 0 var(--zen-border);
}

.md-header__title {
  color: var(--zen-text-primary);
  font-weight: 600;
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
}

.md-header__topic {
  color: var(--zen-text-primary);
  font-weight: 600;
}

.md-header__topic:nth-child(2) {
  color: var(--zen-text-tertiary);
  font-weight: 400;
}

.md-header__button {
  color: var(--zen-text-tertiary);
  transition: color 200ms ease-out;
}

.md-header__button:hover {
  color: var(--zen-text-primary);
}

/* --- Top tabs (Stripe-Docs-style top navigation) -------------------------- */

.md-tabs {
  background-color: var(--zen-bg-surface);
  color: var(--zen-text-secondary);
  border-bottom: 1px solid var(--zen-border);
}

.md-tabs__list {
  margin: 0;
}

.md-tabs__link {
  color: var(--zen-text-tertiary);
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  opacity: 1;
  transition: color 200ms ease-out;
}

.md-tabs__link:hover {
  color: var(--zen-text-primary);
}

.md-tabs__link--active,
.md-tabs__item--active > .md-tabs__link {
  color: var(--zen-text-primary);
  font-weight: 600;
}

.md-tabs__item {
  position: relative;
}

.md-tabs__item--active::after {
  content: "";
  position: absolute;
  left: 0.6rem;
  right: 0.6rem;
  bottom: -1px;
  height: 2px;
  background-color: var(--zen-accent);
  border-radius: 1px;
}

/* --- Sidebar ------------------------------------------------------------- */

.md-sidebar {
  background-color: var(--zen-bg-page);
}

.md-sidebar--primary {
  border-right: 1px solid var(--zen-border);
}

.md-sidebar--secondary {
  border-left: 1px solid var(--zen-border);
}

.md-nav {
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
  font-size: 0.72rem;
}

.md-nav__title {
  color: var(--zen-text-primary);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  background-color: transparent;
  box-shadow: none;
}

.md-nav__link {
  color: var(--zen-text-secondary);
  transition: color 200ms ease-out;
  border-left: 2px solid transparent;
  padding-left: 0.5rem;
  margin-left: -0.5rem;
}

.md-nav__link:hover,
.md-nav__link:focus {
  color: var(--zen-text-primary);
}

.md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  color: var(--zen-accent) !important;
  font-weight: 600;
  border-left-color: var(--zen-accent);
  text-shadow: none;
}

.md-nav__item--nested > .md-nav__link {
  color: var(--zen-text-secondary);
  font-weight: 500;
}

.md-nav__icon {
  color: var(--zen-text-tertiary);
}

/* Sidebar scrollbar */
.md-sidebar__scrollwrap::-webkit-scrollbar {
  width: 6px;
}
.md-sidebar__scrollwrap::-webkit-scrollbar-track {
  background: transparent;
}
.md-sidebar__scrollwrap::-webkit-scrollbar-thumb {
  background: var(--zen-border);
  border-radius: 3px;
}
.md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover {
  background: var(--zen-border-emphasis);
}

/* --- Right TOC (secondary nav) ------------------------------------------- */

.md-nav--secondary .md-nav__title {
  color: var(--zen-text-primary);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.md-nav--secondary .md-nav__link {
  color: var(--zen-text-tertiary);
}

.md-nav--secondary .md-nav__link:hover {
  color: var(--zen-text-primary);
  text-shadow: none;
}

.md-nav--secondary .md-nav__link--active {
  color: var(--zen-accent) !important;
  font-weight: 600;
  border-left-color: var(--zen-accent);
}

/* --- Tables --------------------------------------------------------------- */

.md-typeset table:not([class]) {
  border: 1px solid var(--zen-border);
  border-radius: 6px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.75rem;
  box-shadow: none;
  overflow: hidden;
}

.md-typeset table:not([class]) thead {
  background-color: var(--zen-bg-elevated);
  border-bottom: 1px solid var(--zen-border);
}

.md-typeset table:not([class]) th {
  color: var(--zen-text-primary);
  font-weight: 600;
  border: none;
  padding: 0.75rem 1rem;
  text-align: left;
}

.md-typeset table:not([class]) td {
  color: var(--zen-text-secondary);
  border: none;
  border-top: 1px solid var(--zen-border);
  padding: 0.6rem 1rem;
  background-color: transparent;
}

.md-typeset table:not([class]) tbody tr {
  background-color: var(--zen-bg-surface);
  transition: background-color 200ms ease-out;
}

.md-typeset table:not([class]) tbody tr:nth-child(even) {
  background-color: var(--zen-bg-page);
}

.md-typeset table:not([class]) tbody tr:hover {
  background-color: var(--zen-bg-elevated);
}

/* --- Code blocks ---------------------------------------------------------- */

.md-typeset pre {
  background-color: var(--zen-bg-elevated) !important;
  border: 1px solid var(--zen-border);
  border-radius: 6px;
  box-shadow: none;
}

.md-typeset pre > code {
  color: var(--zen-text-primary);
  font-family: var(--md-code-font, "Cascadia Code"), "JetBrains Mono", monospace;
  font-size: 0.75rem;
  background-color: transparent;
}

[data-md-color-scheme="slate"] .md-typeset pre > code {
  color: var(--zen-text-primary);
}

.md-typeset code {
  font-family: var(--md-code-font, "Cascadia Code"), "JetBrains Mono", monospace;
}

.md-typeset :not(pre) > code {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-primary);
  border: 1px solid var(--zen-border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.85em;
  font-weight: 500;
}

.md-clipboard {
  color: var(--zen-text-muted);
  transition: color 200ms ease-out;
}

.md-clipboard:hover {
  color: var(--zen-text-primary);
}

.md-typeset .highlight .linenodiv {
  color: var(--zen-text-muted);
}

.md-typeset .highlight .hll {
  background-color: var(--zen-accent-subtle);
}

/* Code syntax — minimal palette using Zen accent + neutrals */
[data-md-color-scheme="default"] .highlight .k,    /* keyword */
[data-md-color-scheme="default"] .highlight .kn,
[data-md-color-scheme="default"] .highlight .kd,
[data-md-color-scheme="default"] .highlight .nb { color: #6F42C1; }

[data-md-color-scheme="default"] .highlight .s,    /* string */
[data-md-color-scheme="default"] .highlight .s1,
[data-md-color-scheme="default"] .highlight .s2 { color: #032F62; }

[data-md-color-scheme="default"] .highlight .c,    /* comment */
[data-md-color-scheme="default"] .highlight .c1,
[data-md-color-scheme="default"] .highlight .cm { color: var(--zen-text-muted); font-style: italic; }

[data-md-color-scheme="default"] .highlight .nf,   /* function */
[data-md-color-scheme="default"] .highlight .fm { color: #6F42C1; }

[data-md-color-scheme="default"] .highlight .mi,   /* number */
[data-md-color-scheme="default"] .highlight .mf { color: #005CC5; }

[data-md-color-scheme="slate"] .highlight .k,
[data-md-color-scheme="slate"] .highlight .kn,
[data-md-color-scheme="slate"] .highlight .kd,
[data-md-color-scheme="slate"] .highlight .nb { color: #C4B5FD; }

[data-md-color-scheme="slate"] .highlight .s,
[data-md-color-scheme="slate"] .highlight .s1,
[data-md-color-scheme="slate"] .highlight .s2 { color: #93C5FD; }

[data-md-color-scheme="slate"] .highlight .c,
[data-md-color-scheme="slate"] .highlight .c1,
[data-md-color-scheme="slate"] .highlight .cm { color: var(--zen-text-muted); font-style: italic; }

[data-md-color-scheme="slate"] .highlight .nf,
[data-md-color-scheme="slate"] .highlight .fm { color: #C4B5FD; }

[data-md-color-scheme="slate"] .highlight .mi,
[data-md-color-scheme="slate"] .highlight .mf { color: #93C5FD; }

/* --- Admonitions — neutral surfaces, accent border-left only -------------- */

.md-typeset .admonition,
.md-typeset details {
  background-color: var(--zen-bg-surface);
  border: 1px solid var(--zen-border);
  border-left-width: 3px;
  border-left-color: var(--zen-border-emphasis);
  border-radius: 6px;
  box-shadow: none;
  font-size: 0.78rem;
  color: var(--zen-text-secondary);
}

.md-typeset .admonition-title,
.md-typeset summary {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-primary);
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
  font-weight: 600;
  border-bottom: 1px solid var(--zen-border);
}

.md-typeset .admonition > :last-child,
.md-typeset details > :last-child {
  margin-bottom: 0;
}

/* Note / Info — accent (indigo) */
.md-typeset .admonition.note,
.md-typeset details.note,
.md-typeset .admonition.info,
.md-typeset details.info,
.md-typeset .admonition.abstract,
.md-typeset details.abstract {
  border-left-color: var(--zen-accent);
}

/* Tip / Success — green */
.md-typeset .admonition.tip,
.md-typeset details.tip,
.md-typeset .admonition.success,
.md-typeset details.success {
  border-left-color: var(--zen-success);
}

/* Warning */
.md-typeset .admonition.warning,
.md-typeset details.warning {
  border-left-color: var(--zen-warning);
}

/* Danger / Bug / Error — red */
.md-typeset .admonition.danger,
.md-typeset details.danger,
.md-typeset .admonition.bug,
.md-typeset details.bug,
.md-typeset .admonition.error,
.md-typeset details.error {
  border-left-color: var(--zen-error);
}

/* Question / Example — teal */
.md-typeset .admonition.question,
.md-typeset details.question,
.md-typeset .admonition.example,
.md-typeset details.example {
  border-left-color: var(--zen-teal);
}

/* Quote — neutral */
.md-typeset .admonition.quote,
.md-typeset details.quote {
  border-left-color: var(--zen-text-tertiary);
}

/* --- Search --------------------------------------------------------------- */

.md-search__form {
  background-color: var(--zen-bg-elevated);
  border: 1px solid var(--zen-border);
  border-radius: 6px;
  transition: border-color 200ms ease-out;
}

.md-search__form:hover,
.md-search__form:focus-within {
  border-color: var(--zen-accent);
  background-color: var(--zen-bg-surface);
}

.md-search__input {
  background-color: transparent !important;
  color: var(--zen-text-primary) !important;
  border: none !important;
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
}

.md-search__input::placeholder {
  color: var(--zen-text-muted);
}

.md-search__icon {
  color: var(--zen-text-tertiary);
}

.md-search-result {
  background-color: var(--zen-bg-page);
  color: var(--zen-text-secondary);
}

.md-search-result__meta {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-tertiary);
}

.md-search-result__link {
  border-bottom: 1px solid var(--zen-border);
}

.md-search-result__link:hover,
.md-search-result__link[data-md-state="active"] {
  background-color: var(--zen-bg-surface);
}

.md-search-result__article h1,
.md-search-result__article h2 {
  color: var(--zen-text-primary);
}

.md-search-result mark {
  color: var(--zen-accent);
  background-color: var(--zen-accent-subtle);
}

/* --- Footer --------------------------------------------------------------- */

.md-footer {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-tertiary);
  border-top: 1px solid var(--zen-border);
}

.md-footer__inner {
  color: var(--zen-text-tertiary);
}

.md-footer-meta {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-tertiary);
}

.md-footer__link {
  color: var(--zen-text-secondary);
  opacity: 1;
  transition: color 200ms ease-out;
}

.md-footer__link:hover {
  color: var(--zen-text-primary);
}

.md-footer-copyright,
.md-footer-meta__inner {
  color: var(--zen-text-tertiary);
}

/* --- Tags / badges -------------------------------------------------------- */

.md-typeset .md-tag {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-primary);
  border: 1px solid var(--zen-border);
  border-radius: 4px;
  font-size: 0.7em;
  padding: 0.2em 0.6em;
  font-weight: 500;
}

/* --- Tabbed content (pymdownx.tabbed) ------------------------------------- */

.md-typeset .tabbed-labels > label {
  color: var(--zen-text-tertiary);
  border-bottom: 2px solid transparent;
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
  font-weight: 500;
  transition: color 200ms ease-out, border-color 200ms ease-out;
}

.md-typeset .tabbed-labels > label:hover {
  color: var(--zen-text-primary);
}

.md-typeset .tabbed-set > input:checked + label {
  color: var(--zen-text-primary);
  border-bottom-color: var(--zen-accent);
  font-weight: 600;
}

.md-typeset .tabbed-labels::after {
  background-color: var(--zen-accent);
}

/* --- Blockquotes ---------------------------------------------------------- */

.md-typeset blockquote {
  border-left: 3px solid var(--zen-border-emphasis);
  color: var(--zen-text-secondary);
  background-color: transparent;
  padding: 0.25rem 0 0.25rem 1rem;
  border-radius: 0;
  margin: 1rem 0;
}

.md-typeset blockquote p,
.md-typeset blockquote li {
  color: var(--zen-text-secondary);
}

.md-typeset blockquote strong {
  color: var(--zen-text-primary);
}

.md-typeset blockquote em {
  color: var(--zen-text-tertiary);
}

/* --- Horizontal rules ----------------------------------------------------- */

.md-typeset hr {
  border: none;
  height: 1px;
  background: var(--zen-border);
  margin: 2rem 0;
}

/* --- Lists ---------------------------------------------------------------- */

.md-typeset ul li::marker,
.md-typeset ol li::marker {
  color: var(--zen-text-tertiary);
}

.md-typeset ul,
.md-typeset ol {
  margin-bottom: 1rem;
}

/* --- Card grid (used on section landing pages) --------------------------- */

.md-typeset .grid.cards {
  grid-gap: 0.5rem;
}

.md-typeset .grid.cards > ul > li,
.md-typeset .grid > .card {
  background-color: var(--zen-bg-surface);
  border: 1px solid var(--zen-border);
  border-radius: 6px;
  box-shadow: none;
  transition: border-color 200ms ease-out, transform 200ms ease-out;
}

.md-typeset .grid.cards > ul > li:hover,
.md-typeset .grid > .card:hover {
  border-color: var(--zen-accent);
  transform: translateY(-1px);
}

.md-typeset .grid.cards > ul > li > p:first-child {
  color: var(--zen-text-primary);
  font-weight: 600;
}

/* --- Selection highlight ------------------------------------------------- */

::selection {
  background-color: var(--zen-accent-subtle);
  color: var(--zen-text-primary);
}

[data-md-color-scheme="slate"] ::selection {
  background-color: rgba(129, 140, 248, 0.25);
  color: var(--zen-text-primary);
}

/* --- Global scrollbar ---------------------------------------------------- */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--zen-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--zen-border-emphasis);
}

/* --- Source/edit button -------------------------------------------------- */

.md-content__button {
  color: var(--zen-text-tertiary);
  transition: color 200ms ease-out;
}

.md-content__button:hover {
  color: var(--zen-accent);
}

/* --- Buttons -------------------------------------------------------------- */

.md-typeset .md-button {
  background-color: var(--zen-bg-surface);
  color: var(--zen-text-primary);
  border: 1px solid var(--zen-border);
  border-radius: 6px;
  font-weight: 500;
  font-family: var(--md-text-font, "Inter"), system-ui, sans-serif;
  padding: 0.5rem 1rem;
  transition: background-color 200ms ease-out, border-color 200ms ease-out, color 200ms ease-out;
}

.md-typeset .md-button:hover {
  background-color: var(--zen-bg-elevated);
  border-color: var(--zen-border-emphasis);
  color: var(--zen-text-primary);
}

.md-typeset .md-button--primary {
  background-color: var(--zen-accent);
  color: #FFFFFF;
  border-color: var(--zen-accent);
}

.md-typeset .md-button--primary:hover {
  background-color: var(--zen-accent-hover);
  border-color: var(--zen-accent-hover);
  color: #FFFFFF;
}

/* --- Keyboard keys -------------------------------------------------------- */

.md-typeset kbd {
  background-color: var(--zen-bg-elevated);
  color: var(--zen-text-primary);
  border: 1px solid var(--zen-border);
  border-bottom-width: 2px;
  border-radius: 4px;
  box-shadow: none;
  font-family: var(--md-code-font, "Cascadia Code"), monospace;
  font-size: 0.78em;
  padding: 0.05em 0.5em;
}

/* --- Force-disable any neon residue from old CSS ------------------------- */

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4,
.md-typeset h5,
.md-typeset h6,
.md-typeset a,
.md-tabs__link,
.md-nav__link,
.md-header__title {
  text-shadow: none !important;
}