html {
  box-sizing: border-box;
  font-size: 16px;
}

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

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ol,
ul {
  margin: 0;
  padding: 0;
  font-weight: normal;
}

ol,
ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}
:root {
  /* Color Palette Channel Tokens (OKLCH Components: lightness chroma hue) */
  --gray: 0.55 0.01 260;
  --red: 0.65 0.2 25;
  --orange: 0.7 0.18 55;
  --yellow: 0.85 0.18 95;
  --green: 0.7 0.17 145;
  --blue: 0.65 0.18 250;
  --purple: 0.6 0.2 300;
  --white: 0.98 0.005 260;
  --black: 0.15 0.01 260;

  /* Semantic Color Tokens (Resolved but still mixable downstream) */
  --info: oklch(var(--blue));
  --success: oklch(var(--green));
  --warning: oklch(var(--yellow));
  --error: oklch(var(--red));
  --bg: oklch(var(--gray));
  --fg: oklch(var(--gray));
  --heading: oklch(var(--white));
  --text: oklch(var(--white) / 0.7);
  --border: oklch(var(--gray));

  /* Fonts */
  --font-body: system-ui, -apple-system, sans-serif;
  --font-heading: system-ui, -apple-system, sans-serif;
  --font-code: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  --font-mono: ui-monospace, "SF Mono", monospace;
}
/* Semantic sections */
article {
  margin-block: 2em;
}

section {
  margin-block: 2em;
}

aside {
  margin-block: 1em;
  padding: 1em;
  background: oklch(0.96 0.005 260);
  border-radius: 0.5em;
}

@media (prefers-color-scheme: dark) {
  aside {
    background: oklch(0.2 0.01 260);
  }
}

nav {
  margin-block: 1em;
}

header {
  margin-block-end: 2em;
}

footer {
  margin-block-start: 2em;
  padding-block-start: 1em;
  border-block-start: 1px solid oklch(0.85 0.005 260);
  font-size: 0.875em;
  color: oklch(0.5 0.01 260);
}

@media (prefers-color-scheme: dark) {
  footer {
    border-color: oklch(0.3 0.01 260);
    color: oklch(0.6 0.01 260);
  }
}

main {
  margin-block: 1em;
}

hgroup {
  margin-block: 1.5em 0.5em;
}

hgroup > * {
  margin-block: 0;
}

hgroup > p {
  color: oklch(0.5 0.01 260);
}

@media (prefers-color-scheme: dark) {
  hgroup > p {
    color: oklch(0.6 0.01 260);
  }
}
/* Body */
body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: oklch(0.2 0.01 260);
  background: oklch(0.98 0.005 260);
  max-width: 65ch;
  margin: 0 auto;
  padding: 2rem 1rem;
}

@media (prefers-color-scheme: dark) {
  body {
    color: oklch(0.9 0.01 260);
    background: oklch(0.15 0.01 260);
  }
}
/* Blockquote */
blockquote {
  margin-block: 1em;
  margin-inline: 0;
  padding-inline-start: 1em;
  border-inline-start: 3px solid oklch(var(--neutral));
  color: oklch(0.4 0.01 260);
}

@media (prefers-color-scheme: dark) {
  blockquote {
    color: oklch(0.7 0.01 260);
  }
}

blockquote > p:first-child {
  margin-block-start: 0;
}

blockquote > p:last-child {
  margin-block-end: 0;
}

/* Inline quote */
q {
  quotes: "" " " "" "'" "'";
}

q::before {
  content: open-quote;
}
q::after {
  content: close-quote;
}
/* Inline code */
code {
  font-family: var(--font-code);
  font-size: 0.875em;
  background: oklch(0.92 0.005 260);
  padding: 0.125em 0.375em;
  border-radius: 0.25em;
}

@media (prefers-color-scheme: dark) {
  code {
    background: oklch(0.25 0.01 260);
  }
}

/* Preformatted / code blocks */
pre {
  font-family: var(--font-code);
  font-size: 0.875em;
  line-height: 1.5;
  background: oklch(0.92 0.005 260);
  padding: 1em;
  border-radius: 0.5em;
  overflow-x: auto;
  margin-block: 1em;
}

@media (prefers-color-scheme: dark) {
  pre {
    background: oklch(0.2 0.01 260);
  }
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

/* Keyboard input */
kbd {
  font-family: var(--font-code);
  font-size: 0.875em;
  background: oklch(0.95 0.005 260);
  border: 1px solid oklch(0.8 0.01 260);
  border-radius: 0.25em;
  padding: 0.125em 0.375em;
  box-shadow: 0 1px 0 oklch(0.7 0.01 260);
}

@media (prefers-color-scheme: dark) {
  kbd {
    background: oklch(0.3 0.01 260);
    border-color: oklch(0.4 0.01 260);
    box-shadow: 0 1px 0 oklch(0.2 0.01 260);
  }
}

/* Sample output */
samp {
  font-family: var(--font-code);
  font-size: 0.875em;
}

/* Variable */
var {
  font-style: italic;
}
/* Details / Summary */
details {
  margin-block: 1em;
  border: 1px solid oklch(0.85 0.005 260);
  border-radius: 0.5em;
  padding: 0;
}

@media (prefers-color-scheme: dark) {
  details {
    border-color: oklch(0.35 0.01 260);
  }
}

summary {
  font-weight: 500;
  padding: 0.75em 1em;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::before {
  content: "▸";
  display: inline-block;
  margin-inline-end: 0.5em;
  transition: transform 0.2s ease;
  font-size: 1.25em;
}

details[open] > summary::before {
  transform: rotate(90deg);
}

details[open] > summary {
  border-block-end: 1px solid oklch(0.85 0.005 260);
}

@media (prefers-color-scheme: dark) {
  details[open] > summary {
    border-color: oklch(0.35 0.01 260);
  }
}

details > :not(summary) {
  padding-inline: 1em;
}

details > :last-child {
  padding-block-end: 1em;
}
/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  margin-block: 1.5em 0.5em;
  color: oklch(var(--heading));
}

h1:first-child,
h2:first-child,
h3:first-child,
h4:first-child,
h5:first-child,
h6:first-child {
  margin-block-start: 0;
}

h1 {
  font-size: 2rem;
}
h2 {
  font-size: 1.5rem;
}
h3 {
  font-size: 1.25rem;
}
h4 {
  font-size: 1rem;
}
h5 {
  font-size: 0.875rem;
  text-transform: uppercase;
}
h6 {
  font-size: 0.75rem;
  text-transform: uppercase;
}
/* Anchor Element Styles */

a {
  color: currentColor;
  text-decoration: underline;
  text-underline-offset: 5px;
  transition: opacity 0.2s ease, text-decoration-color 0.2s ease;
  cursor: pointer;
  text-decoration-color: color-mix(in srgb, currentColor 30%, transparent);
  text-decoration-thickness: 2px;
}

a:hover {
  opacity: 0.8;
}

a:focus {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

a:focus:not(:focus-visible) {
  outline: none;
}

a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

a:active {
  opacity: 0.6;
}

/* Visited state */
a:visited {
  color: currentColor;
  opacity: 0.85;
}

/* External links - using attribute selector for classless approach */
a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.75em;
  color: color-mix(in srgb, currentColor 30%, transparent);
}

/* Download links */
a[download]::before {
  content: "↓ ";
  font-size: 0.85em;
  color: color-mix(in srgb, currentColor 30%, transparent);
}

/* Email links */
a[href^="mailto:"]::before {
  content: "✉ ";
  font-size: 1.35rem;
  color: color-mix(in srgb, currentColor 30%, transparent);
}

/* Phone links */
a[href^="tel:"]::before {
  content: "☎ ";
  font-size: 0.8rem;
  color: color-mix(in srgb, currentColor 30%, transparent);
}

/* Disabled state using aria-disabled */
a[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Current page indicator */
a[aria-current="page"] {
  font-weight: bold;
}

/* optional: Skip link for accessibility */
a[href^="#"]::before {
  content: "# ";
  color: color-mix(in srgb, currentColor 30%, transparent);
}
/* Form */
form {
  margin-block: 1em;
}

/* Fieldset */
fieldset {
  border: 1px solid oklch(0.85 0.005 260);
  border-radius: 0.5em;
  padding: 1em;
  margin-block: 1em;
}

@media (prefers-color-scheme: dark) {
  fieldset {
    border-color: oklch(0.35 0.01 260);
  }
}

legend {
  font-weight: 600;
  padding-inline: 0.5em;
}

/* Label */
label {
  display: block;
  font-weight: 500;
  margin-block-end: 0.25em;
}

/* Inputs */
input,
textarea,
select {
  font-family: inherit;
  font-size: 1em;
  line-height: 1.5;
  padding: 0.5em 0.75em;
  border: 1px solid oklch(0.8 0.01 260);
  border-radius: 0.375em;
  background: oklch(1 0 0);
  color: inherit;
  width: 100%;
  max-width: 100%;
}

@media (prefers-color-scheme: dark) {
  input,
  textarea,
  select {
    border-color: oklch(0.4 0.01 260);
    background: oklch(0.2 0.01 260);
  }
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid oklch(var(--primary));
  outline-offset: 1px;
}

input::placeholder,
textarea::placeholder {
  color: oklch(0.6 0.01 260);
}

/* Checkbox and Radio */
input[type="checkbox"],
input[type="radio"] {
  width: auto;
  margin-inline-end: 0.5em;
  accent-color: oklch(var(--primary));
}

/* Button */
button,
input[type="submit"],
input[type="reset"],
input[type="button"] {
  font-family: inherit;
  font-size: 1em;
  font-weight: 500;
  line-height: 1.5;
  padding: 0.5em 1em;
  border: none;
  border-radius: 0.375em;
  background: oklch(var(--primary));
  color: oklch(1 0 0);
  cursor: pointer;
  width: auto;
}

button:hover,
input[type="submit"]:hover {
  background: oklch(0.55 0.18 250);
}

button:active,
input[type="submit"]:active {
  background: oklch(0.5 0.18 250);
}

button:focus-visible {
  outline: 2px solid oklch(var(--primary));
  outline-offset: 2px;
}

button:disabled,
input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Textarea */
textarea {
  min-height: 6em;
  resize: vertical;
}

/* Select */
select {
  cursor: pointer;
}

/* Output */
output {
  font-weight: 600;
}

/* Progress */
progress {
  width: 100%;
  height: 0.5em;
  border-radius: 0.25em;
  overflow: hidden;
}

progress::-webkit-progress-bar {
  background: oklch(0.9 0.005 260);
  border-radius: 0.25em;
}

progress::-webkit-progress-value {
  background: oklch(var(--primary));
  border-radius: 0.25em;
}

progress::-moz-progress-bar {
  background: oklch(var(--primary));
  border-radius: 0.25em;
}

/* Meter */
meter {
  width: 100%;
  height: 0.5em;
}
/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Figure */
figure {
  margin-block: 1em;
  margin-inline: 0;
}

figcaption {
  font-size: 0.875em;
  color: oklch(0.5 0.01 260);
  margin-block-start: 0.5em;
}

@media (prefers-color-scheme: dark) {
  figcaption {
    color: oklch(0.6 0.01 260);
  }
}

/* Video and Audio */
video,
audio {
  max-width: 100%;
}

/* Canvas */
canvas {
  display: block;
}

/* Iframe */
iframe {
  border: none;
  max-width: 100%;
}

/* Picture */
picture {
  display: block;
  img {
    border-radius: 0.25em;
  }
}

/* Object and Embed */
object,
embed {
  max-width: 100%;
}
/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 1em;
  font-size: 0.9375em;
}

caption {
  font-weight: 600;
  text-align: start;
  margin-block-end: 0.5em;
}

thead {
  border-block-end: 2px solid oklch(0.8 0.005 260);
}

@media (prefers-color-scheme: dark) {
  thead {
    border-color: oklch(0.35 0.01 260);
  }
}

th {
  font-weight: 600;
  text-align: start;
  padding: 0.5em 0.75em;
}

td {
  padding: 0.5em 0.75em;
}

tbody tr {
  border-block-end: 1px solid oklch(0.9 0.005 260);
}

@media (prefers-color-scheme: dark) {
  tbody tr {
    border-color: oklch(0.25 0.01 260);
  }
}

tfoot {
  border-block-start: 2px solid oklch(0.8 0.005 260);
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  tfoot {
    border-color: oklch(0.35 0.01 260);
  }
}
/* Strong / Bold */
strong,
b {
  font-weight: 600;
}

/* Emphasis / Italic */
em,
i {
  font-style: italic;
}

/* Small */
small {
  font-size: 0.875em;
}

/* Strikethrough */
s,
del {
  text-decoration: line-through;
}

/* Inserted text */
ins {
  text-decoration: underline;
}

/* Mark / Highlight */
mark {
  background: oklch(0.92 0.15 95);
  padding-inline: 0.125em;
  border-radius: 0.125em;
}

@media (prefers-color-scheme: dark) {
  mark {
    background: oklch(0.45 0.12 95);
    color: oklch(0.95 0.01 95);
  }
}

/* Subscript / Superscript */
sub,
sup {
  font-size: 0.75em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sup {
  top: -0.5em;
}
sub {
  bottom: -0.25em;
}

/* Abbreviation */
abbr[title] {
  text-decoration: underline dotted;
  cursor: help;
}

/* Citation */
cite {
  font-style: italic;
}

/* Definition */
dfn {
  font-style: italic;
  font-weight: 600;
}

/* Address */
address {
  font-style: normal;
  margin-block: 1em;
}

/* Time */
time {
  /* No special styling, semantic only */
}

/* Data */
data {
  /* No special styling, semantic only */
}

/* Underline (unarticulated annotation) */
u {
  text-decoration: underline;
  text-decoration-style: wavy;
  text-decoration-color: oklch(var(--danger));
}
/* Paragraph */
p {
  margin-block: 1em;
  color: var(--text);
}

p:first-child {
  margin-block-start: 0;
}

p:last-child {
  margin-block-end: 0;
}
/* Dialog */
dialog {
  border: none;
  border-radius: 0.5em;
  padding: 1.5em;
  max-width: min(90vw, 40ch);
  box-shadow: 0 4px 24px oklch(0 0 0 / 0.15);
}

dialog::backdrop {
  background: oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  dialog {
    background: oklch(0.2 0.01 260);
    color: oklch(0.9 0.01 260);
  }
}
/* Horizontal rule */
hr {
  border: none;
  border-block-start: 1px solid oklch(0.85 0.005 260);
  margin-block: 2em;
}

@media (prefers-color-scheme: dark) {
  hr {
    border-color: oklch(0.3 0.01 260);
  }
}
/* Lists */
ul,
ol {
  margin-block: 1em;
  padding-inline-start: 1.5em;
}

ul {
  list-style-type: disc;
}
ol {
  list-style-type: decimal;
}

li {
  margin-block: 0.25em;
}

li::marker {
  color: oklch(var(--neutral));
}

/* Nested lists */
ul ul,
ol ol,
ul ol,
ol ul {
  margin-block: 0.25em;
}

/* Description lists */
dl {
  margin-block: 1em;
}

dt {
  font-weight: 600;
  margin-block-start: 1em;
}

dt:first-child {
  margin-block-start: 0;
}

dd {
  margin-inline-start: 1.5em;
  margin-block: 0.25em;
}
/* Accordion Component */
/* Uses native details/summary with the name attribute for exclusive behavior */

details[name] {
  border: 1px solid oklch(0.85 0.005 260);
  border-radius: 0.5em;
  margin-block-end: 0.5em;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  details[name] {
    border-color: oklch(0.35 0.01 260);
  }
}

details[name] > summary {
  padding: 1em;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

details[name] > summary::-webkit-details-marker {
  display: none;
}

details[name] > summary::after {
  content: "+";
  float: inline-end;
  font-size: 1.25em;
  line-height: 1;
  transition: transform 0.2s ease;
}

details[name][open] > summary::after {
  content: "−";
}

details[name] > :not(summary) {
  padding-inline: 1em;
}

details[name] > :last-child {
  padding-block-end: 1em;
}

/* Nested accordions */
details[name] details {
  margin: 0.5em 0;
  border-inline-start: 2px solid oklch(0.7 0.1 250);
  padding-inline-start: 1em;
  border-radius: 0;
  border-block: none;
  border-inline-end: none;
}

details[name] details > summary {
  font-weight: 500;
  padding: 0.5em 0;
}

details[name] details > summary::after {
  content: "▸";
}

details[name] details[open] > summary::after {
  content: "▸";
  transform: rotate(90deg);
}
/* Menu Component */
/* Pure CSS navigation menu with support for nesting, sticky positioning, and layout options */

/* Base menu styles */
nav[role="navigation"] {
  font-family: inherit;
}

nav[role="navigation"] ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}

nav[role="navigation"] li {
  position: relative;
}

nav[role="navigation"] a,
nav[role="navigation"] button {
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.75em 1em;
  text-decoration: none;
  color: inherit;
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* Reset anchor hash prefix from elements/a.ts */
nav[role="navigation"] a[href^="#"]::before {
  content: none;
}

nav[role="navigation"] a:hover,
nav[role="navigation"] a:focus,
nav[role="navigation"] button:hover,
nav[role="navigation"] button:focus {
  background-color: oklch(0.95 0 0);
  outline: none;
}

nav[role="navigation"] a[aria-current="page"] {
  font-weight: 600;
  background-color: oklch(0.92 0.02 250);
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"] a:hover,
  nav[role="navigation"] a:focus,
  nav[role="navigation"] button:hover,
  nav[role="navigation"] button:focus {
    background-color: oklch(0.25 0.01 260);
  }

  nav[role="navigation"] a[aria-current="page"] {
    background-color: oklch(0.3 0.02 250);
  }
}

/* ============================================================================
   Horizontal Layout (default)
   ============================================================================ */

nav[role="navigation"][aria-orientation="horizontal"] > ul,
nav[role="navigation"]:not([aria-orientation]) > ul {
  flex-direction: row;
}

nav[role="navigation"][aria-orientation="horizontal"] > ul > li,
nav[role="navigation"]:not([aria-orientation]) > ul > li {
  border-inline-end: 1px solid oklch(0.9 0 0);
}

nav[role="navigation"][aria-orientation="horizontal"] > ul > li:last-child,
nav[role="navigation"]:not([aria-orientation]) > ul > li:last-child {
  border-inline-end: none;
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"][aria-orientation="horizontal"] > ul > li,
  nav[role="navigation"]:not([aria-orientation]) > ul > li {
    border-color: oklch(0.35 0.01 260);
  }
}

/* Horizontal submenu positioning */
nav[role="navigation"][aria-orientation="horizontal"] ul ul,
nav[role="navigation"]:not([aria-orientation]) ul ul {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 12em;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  flex-direction: column;
  background: oklch(1 0 0);
  border: 1px solid oklch(0.85 0.005 260);
  border-radius: 0.5em;
  box-shadow: 0 4px 12px oklch(0 0 0 / 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-0.5em);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  z-index: 100;
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"][aria-orientation="horizontal"] ul ul,
  nav[role="navigation"]:not([aria-orientation]) ul ul {
    background: oklch(0.2 0.01 260);
    border-color: oklch(0.35 0.01 260);
    box-shadow: 0 4px 12px oklch(0 0 0 / 0.3);
  }
}

/* Show submenu on hover/focus */
nav[role="navigation"] li:hover > ul,
nav[role="navigation"] li:focus-within > ul {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Nested submenu positioning (horizontal) */
nav[role="navigation"][aria-orientation="horizontal"] ul ul ul,
nav[role="navigation"]:not([aria-orientation]) ul ul ul {
  top: 0;
  left: 100%;
}

/* ============================================================================
   Vertical Layout
   ============================================================================ */

nav[role="navigation"][aria-orientation="vertical"] > ul {
  flex-direction: column;
}

nav[role="navigation"][aria-orientation="vertical"] li {
  border-block-end: 1px solid oklch(0.9 0 0);
}

nav[role="navigation"][aria-orientation="vertical"] li:last-child {
  border-block-end: none;
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"][aria-orientation="vertical"] li {
    border-color: oklch(0.35 0.01 260);
  }
}

/* Vertical submenu positioning */
nav[role="navigation"][aria-orientation="vertical"] ul ul {
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 12em;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  flex-direction: column;
  background: oklch(1 0 0);
  border: 1px solid oklch(0.85 0.005 260);
  border-radius: 0.5em;
  box-shadow: 0 4px 12px oklch(0 0 0 / 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-0.5em);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  z-index: 100;
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"][aria-orientation="vertical"] ul ul {
    background: oklch(0.2 0.01 260);
    border-color: oklch(0.35 0.01 260);
    box-shadow: 0 4px 12px oklch(0 0 0 / 0.3);
  }
}

nav[role="navigation"][aria-orientation="vertical"] li:hover > ul,
nav[role="navigation"][aria-orientation="vertical"] li:focus-within > ul {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* ============================================================================
   Sticky Positioning
   ============================================================================ */

nav[role="navigation"][data-sticky] {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: oklch(1 0 0);
  border-block-end: 1px solid oklch(0.85 0.005 260);
}

nav[role="navigation"][data-sticky="bottom"] {
  top: auto;
  bottom: 0;
  border-block-end: none;
  border-block-start: 1px solid oklch(0.85 0.005 260);
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"][data-sticky] {
    background: oklch(0.15 0.01 260);
    border-color: oklch(0.35 0.01 260);
  }
}

/* ============================================================================
   Submenu Indicators
   ============================================================================ */

nav[role="navigation"] li:has(> ul) > a::after,
nav[role="navigation"] li:has(> ul) > button::after {
  content: "";
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  border-inline-end: 2px solid currentColor;
  border-block-end: 2px solid currentColor;
  margin-inline-start: auto;
}

/* Horizontal: arrow points down for top-level */
nav[role="navigation"][aria-orientation="horizontal"] > ul > li:has(> ul) > a::after,
nav[role="navigation"][aria-orientation="horizontal"] > ul > li:has(> ul) > button::after,
nav[role="navigation"]:not([aria-orientation]) > ul > li:has(> ul) > a::after,
nav[role="navigation"]:not([aria-orientation]) > ul > li:has(> ul) > button::after {
  transform: rotate(45deg);
  margin-block-end: 0.2em;
}

/* Nested submenus: arrow points right */
nav[role="navigation"][aria-orientation="horizontal"] ul ul li:has(> ul) > a::after,
nav[role="navigation"][aria-orientation="horizontal"] ul ul li:has(> ul) > button::after,
nav[role="navigation"]:not([aria-orientation]) ul ul li:has(> ul) > a::after,
nav[role="navigation"]:not([aria-orientation]) ul ul li:has(> ul) > button::after {
  transform: rotate(-45deg);
}

/* Vertical: arrow always points right */
nav[role="navigation"][aria-orientation="vertical"] li:has(> ul) > a::after,
nav[role="navigation"][aria-orientation="vertical"] li:has(> ul) > button::after {
  transform: rotate(-45deg);
}

/* ============================================================================
   Menu Dividers
   ============================================================================ */

nav[role="navigation"] li[role="separator"] {
  height: 1px;
  margin: 0.25em 0;
  background: oklch(0.85 0.005 260);
}

nav[role="navigation"][aria-orientation="horizontal"] > ul > li[role="separator"],
nav[role="navigation"]:not([aria-orientation]) > ul > li[role="separator"] {
  width: 1px;
  height: auto;
  margin: 0 0.25em;
}

@media (prefers-color-scheme: dark) {
  nav[role="navigation"] li[role="separator"] {
    background: oklch(0.35 0.01 260);
  }
}

/* ============================================================================
   Disabled Menu Items
   ============================================================================ */

nav[role="navigation"] a[aria-disabled="true"],
nav[role="navigation"] button[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}