/* layout: no top bar on desktop, the sidebar carries logo and search, no
   dividers anywhere, a narrow reading column */
:root,
:root[data-theme="light"] {
  --sl-content-width: 36rem;
  --sl-sidebar-width: 18.5rem;
  --sl-sidebar-pad-x: 3rem;
  /* one top inset shared by sidebar, content and table of contents */
  --docs-top: 5rem;
  --sl-color-hairline: transparent;
  --sl-color-hairline-light: transparent;
  --sl-color-hairline-shade: transparent;
}

@media (min-width: 50rem) {
  :root[data-has-sidebar] {
    --sl-nav-height: 0rem;
  }

  :root[data-has-sidebar] .header {
    display: none;
  }
}

/* the landing page keeps a header, but it scrolls away with the page */
:root:not([data-has-sidebar]) .header {
  position: absolute;
  background: transparent;
}

.docs-header,
.docs-header-end {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.docs-header {
  justify-content: space-between;
  height: 100%;
}

::selection {
  background-color: var(--color-background-info-subtle-hover);
  color: var(--color-foreground-default);
}

/* sidebar */
@media (min-width: 50rem) {
  .sidebar-content {
    padding-top: var(--docs-top);
    /* more gutter on the left, with the freed space taken from the invisible
       right side so the nav keeps its width and long labels don't wrap */
    padding-inline: 5rem 1rem;
    gap: 1.75rem;
  }

  :root[data-has-sidebar] main > .content-panel:first-of-type {
    padding-top: var(--docs-top);
    /* the title panel and the body panel each add 1.5rem of padding, which
       leaves a 3rem gap under the title; trim it to the reference's 1rem */
    padding-bottom: 0.5rem;
  }

  :root[data-has-sidebar] main > .content-panel:first-of-type + .content-panel {
    padding-top: 0.5rem;
  }

  .right-sidebar-panel {
    padding-top: var(--docs-top);
  }

  :root[data-has-sidebar] main > .content-panel:first-of-type h1 {
    margin-top: 0;
  }
}

/* the "On this page" label is just a bold entry, the same size as the links */
.right-sidebar-panel h2 {
  font-size: var(--sl-text-xs);
  font-weight: var(--font-weight-semibold);
}

/* every ToC entry aligns with the label: no indent for nested headings */
.right-sidebar-panel nav a {
  padding-inline-start: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-top {
  align-items: center;
  justify-content: space-between;
}

.site-title {
  color: var(--sl-color-white);
}

/* search: a pill at the top of the sidebar that opens the search dialog */
.sidebar-search button[data-open-modal] {
  display: flex;
  width: 100%;
  height: 2rem;
  max-width: none;
  gap: 0.5rem;
  padding-inline: 0.75rem;
  border: 1px solid var(--color-border-default);
  border-radius: 9999px;
  background-color: var(--color-background-default);
  color: var(--color-foreground-subtle);
  font-size: 0.875rem;
}

.sidebar-search button[data-open-modal]:hover {
  border-color: var(--color-border-strong);
  color: var(--color-foreground-muted);
}

.sidebar-search button[data-open-modal] > span {
  display: block;
}

.sidebar-search button[data-open-modal] kbd {
  margin-inline-start: auto;
  background: transparent;
  color: var(--color-foreground-subtle);
}

/* the dialog takes the reading column's width, and its corners follow the
   input's radius out by the frame's padding, so the two curves are concentric */
site-search dialog {
  margin-top: 12vh;
  border: 1px solid var(--color-border-default);
  border-radius: calc(var(--radius-md) + var(--spacing-xs));
  background-color: var(--color-background-default);
  box-shadow: 0 24px 48px -12px var(--color-shadow-ambient-strong);
}

@media (min-width: 50rem) {
  site-search dialog {
    max-width: var(--sl-content-width);
    min-height: 0;
  }

  site-search .dialog-frame {
    padding: var(--spacing-xs);
  }
}

site-search .dialog-frame {
  scrollbar-width: none;
}

site-search .dialog-frame::-webkit-scrollbar {
  display: none;
}

site-search dialog::backdrop {
  /* the web app's modal scrim: black in both themes, so dark mode dims rather
     than lightens the page behind the dialog */
  background-color: rgb(0 0 0 / 0.4);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

/* the search dialog's input and results are set at the prose size. pagefind
   groups results by page; the page titles are hidden so the matches read as
   one flat list of cards, which only show a background on hover. the input follows the app's list search
   (Input with a search icon and a ghost clear button) */
#starlight__search {
  --pagefind-ui-border-radius: var(--radius-md);
  --search-match: #fef08a;
}

:root[data-theme="dark"] #starlight__search {
  --search-match: rgb(250 204 21 / 0.3);
}

#starlight__search .pagefind-ui__search-input {
  height: 2rem;
  padding-inline: 1.875rem 2rem;
  border: 0;
  background-color: var(--color-background-default);
  box-shadow: inset 0 0 0 1px var(--color-shadow-ring);
  font-size: var(--sl-text-body);
  transition: box-shadow 150ms;
}

#starlight__search input:focus {
  outline: none;
  box-shadow:
    inset 0 0 0 1px var(--color-border-strong),
    0 0 0 1px var(--color-border-strong);
}

#starlight__search .pagefind-ui__search-input::placeholder {
  color: var(--color-foreground-placeholder);
  opacity: 1;
}

#starlight__search .pagefind-ui__form::before {
  top: 0.5625rem;
  left: 0.5rem;
  width: 0.875rem;
  height: 0.875rem;
  background-color: var(--color-foreground-subtle);
}

#starlight__search .pagefind-ui__search-clear {
  top: 0.25rem;
  right: 0.25rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-sm);
}

#starlight__search .pagefind-ui__search-clear:hover {
  background-color: var(--color-background-inset);
}

#starlight__search .pagefind-ui__search-clear::before {
  background-color: var(--color-foreground-muted);
  mask-size: 0.875rem;
  -webkit-mask-size: 0.875rem;
}

#starlight__search .pagefind-ui__results-area {
  margin-top: var(--spacing-xs);
}

#starlight__search .pagefind-ui__message {
  height: auto;
  padding: 0 var(--spacing-sm) var(--spacing-xs);
  color: var(--color-foreground-subtle);
  font-size: var(--sl-text-sm);
  font-weight: 400;
}

#starlight__search :is(.pagefind-ui__results, .pagefind-ui__result-inner) {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.125rem;
}

#starlight__search .pagefind-ui__results > * + * {
  margin-top: 0;
}

#starlight__search .pagefind-ui__result-inner > .pagefind-ui__result-title {
  display: none;
}

#starlight__search .pagefind-ui__result-nested::before {
  content: none;
}

#starlight__search .pagefind-ui__result-nested {
  padding: 0.375rem var(--spacing-sm);
  border-radius: var(--radius-md);
  background-color: transparent;
}

#starlight__search .pagefind-ui__result-nested .pagefind-ui__result-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--sl-text-body);
  line-height: var(--sl-line-height);
}

#starlight__search .pagefind-ui__result-link[data-page]::before {
  position: static;
  content: attr(data-page) " / ";
  color: var(--color-foreground-muted);
}

#starlight__search .pagefind-ui__result-nested .pagefind-ui__result-link {
  color: var(--color-foreground-default);
  font-size: inherit;
  font-weight: var(--font-weight-medium);
}

#starlight__search .pagefind-ui__result-excerpt {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-foreground-muted);
  font-size: var(--sl-text-body);
  line-height: var(--sl-line-height);
}

#starlight__search .pagefind-ui__result-excerpt[data-clipped]::before {
  content: "… ";
}

#starlight__search .pagefind-ui__result-excerpt[data-trails]::after {
  content: " …";
}

#starlight__search mark {
  border-radius: 0.125rem;
  background-color: var(--search-match);
  color: inherit;
  font-weight: inherit;
}

#starlight__search .pagefind-ui__result-nested:is(:hover, [data-active]) {
  outline: none;
  background-color: var(--color-background-inset);
}

#starlight__search .pagefind-ui__result-title:not(:where(.pagefind-ui__result-nested *)):focus-within,
#starlight__search .pagefind-ui__result-nested:focus-within {
  outline: none;
}

#starlight__search .pagefind-ui__result-nested a:focus-visible {
  outline: none;
}

#starlight__search .pagefind-ui__result-nested:has(a:focus-visible) {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* results show a page of cards at a time (see Search.astro). while more can
   load, the last shown card fades out, and scrolling it into view loads more
   in place of pagefind's button */
#starlight__search .pagefind-ui__result-nested[data-overflow],
#starlight__search .pagefind-ui__button {
  display: none;
}

#starlight__search .pagefind-ui__result-nested[data-faded] {
  mask-image: linear-gradient(to bottom, rgb(0 0 0 / 0.5), transparent);
  pointer-events: none;
}

/* the sidebar scrolls, but without a visible scrollbar */
.sidebar-pane {
  scrollbar-width: none;
}

.sidebar-pane::-webkit-scrollbar {
  display: none;
}

/* the mobile menu toggle is a ghost button */
starlight-menu-button button {
  background-color: transparent;
  box-shadow: none;
  border-radius: var(--radius-md);
  color: var(--color-foreground-muted);
}

starlight-menu-button button:hover,
starlight-menu-button[aria-expanded="true"] button {
  background-color: var(--color-background-inset);
}

starlight-menu-button button:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* on mobile the header reserves room for the fixed menu button, with a 0.5rem gap */
@media (max-width: 49.999rem) {
  :root[data-has-sidebar] .header {
    padding-inline-end: calc(0.5rem + var(--sl-nav-pad-x) + var(--sl-menu-button-size));
  }
}

/* the nav: one size throughout, bold group headings, whitespace between groups */
.docs-nav {
  font-size: 0.875rem;
  line-height: 1.2;
}

.docs-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.docs-nav > * + * {
  margin-top: 1.75rem;
}

.docs-nav h2,
.docs-nav h3 {
  margin: 0 0 0.25rem;
  font-size: inherit;
  line-height: inherit;
  color: var(--color-foreground-default);
}

.docs-nav h2 {
  font-weight: var(--font-weight-semibold);
}

.docs-nav h3 {
  font-weight: var(--font-weight-medium);
}

.docs-nav .subgroup {
  margin-block: 0.75rem;
}

.docs-nav a {
  display: block;
  padding-block: 0.25rem;
  color: var(--color-foreground-muted);
  text-decoration: none;
}

.docs-nav a:hover {
  color: var(--color-foreground-default);
}

.docs-nav a[aria-current="page"] {
  color: var(--color-foreground-default);
  font-weight: var(--font-weight-medium);
}

/* content: markup.css does the typography. what's left is fitting it around
   the elements starlight adds */

/* body text sits a step below the brightest foreground; headings and links
   stay bright. markup.css sets the container colour and each heading's, so a
   rule on the container re-tints the prose without dimming the headings */
.markup {
  color: var(--color-foreground-muted);
}

/* tables take the web app's card/panel radius (--radius-md). the outer border
   sits on the table (a block scroll container), so its corners follow the
   radius cleanly: the cells keep only their inner rules and no border is
   clipped at the corners */
.markup table {
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  border-collapse: separate;
  border-spacing: 0;
}

/* code blocks are the same kind of panel, so match the table radius.
   markup.css gives every `pre` the smaller inline radius, which also wins over
   expressive-code's own border radius, so override it here */
.markup pre {
  border-radius: var(--radius-md);
}

/* keyboard keys follow kumo-svelte's prose `kbd`: a flat keycap -- a hairline
   border on the base surface, no inset shadow -- set in mono at 0.875em */
.markup kbd {
  padding: 0.125rem 0.375rem;
  border: 1px solid var(--color-border-default);
  border-radius: 0.25rem;
  background-color: var(--color-background-default);
  color: var(--color-foreground-default);
  font-family: var(--font-mono);
  font-size: 0.875em;
  font-weight: 400;
  line-height: inherit;
  box-shadow: none;
}

.markup :is(th, td) {
  border: 0;
  border-inline-end: 1px solid var(--color-border-default);
  border-block-end: 1px solid var(--color-border-default);
}

/* the last column and row drop their inner rules, the table border closes them */
.markup tr > :last-child {
  border-inline-end: 0;
}

.markup tbody tr:last-child > * {
  border-block-end: 0;
}

.markup :is(p, li, dd, blockquote) {
  overflow-wrap: break-word;
}

.markup :is(h1, h2, h3, h4, h5, h6) {
  text-wrap: balance;
}

/* starlight wraps each heading with its anchor link. the rule under a
   readme's h1 and h2 goes on the wrapper, so it spans the column */
.markup .sl-heading-wrapper {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

.markup .sl-heading-wrapper > :is(h1, h2, h3, h4, h5, h6) {
  margin: 0;
  border: 0;
  padding: 0;
}

.markup .sl-heading-wrapper:is(.level-h1, .level-h2) {
  border-bottom: 1px solid var(--color-border-default);
  padding-bottom: var(--spacing-xs);
}

.markup > :first-child,
.markup > .sl-heading-wrapper:first-child {
  margin-top: 0;
}

/* keep the shared markup styles' always-on underline: the text stays the
   brightest foreground, the underline is muted until hover, then brightens.
   this drops the indigo link-hover colour (web/src/markup.css). the heading
   anchor keeps its `#` */
.markup a:not(.sl-anchor-link) {
  color: var(--color-foreground-default);
  text-decoration-color: var(--color-foreground-muted);
}

.markup a:not(.sl-anchor-link):hover {
  color: var(--color-foreground-default);
  text-decoration-color: var(--color-foreground-default);
}

/* the anchor link, shown as tangled.org's `#` on hover */
.markup .sl-anchor-link {
  margin-inline-start: var(--spacing-xs);
  color: var(--color-foreground-placeholder);
  text-decoration: none;
  opacity: 0;
  transition: opacity 150ms;
}

.markup .sl-heading-wrapper:hover .sl-anchor-link,
.markup .sl-anchor-link:focus-visible {
  opacity: 1;
}

.markup .sl-anchor-link svg {
  display: none;
}

.markup .sl-anchor-link::before {
  content: "#";
}

/* asides, styled like tangled.org's github alerts */
.markup .starlight-aside {
  margin-block: var(--spacing-sm);
  padding: 0 0 0 var(--spacing-md);
  border: 0;
  border-inline-start: 2px solid var(--color-border-default);
  background: transparent;
}

.markup .starlight-aside__title {
  gap: 0;
  font-size: inherit;
  font-weight: var(--font-weight-semibold);
}

.markup .starlight-aside__icon {
  display: none;
}

.markup .starlight-aside--note,
.markup .starlight-aside--tip {
  border-color: var(--color-background-info-emphasis);
}

.markup .starlight-aside--note .starlight-aside__title {
  color: var(--color-foreground-info);
}

.markup .starlight-aside--tip {
  border-color: var(--color-background-success-emphasis);
}

.markup .starlight-aside--tip .starlight-aside__title {
  color: var(--color-foreground-success);
}

.markup .starlight-aside--caution {
  border-color: var(--color-background-warning-emphasis);
}

.markup .starlight-aside--caution .starlight-aside__title {
  color: var(--color-foreground-warning);
}

.markup .starlight-aside--danger {
  border-color: var(--color-background-danger-emphasis);
}

.markup .starlight-aside--danger .starlight-aside__title {
  color: var(--color-foreground-danger);
}

/* no next/previous links at the foot of the page */
.pagination-links {
  display: none;
}

/* expressive code sets its own size on pre; markup.css sizes code at 0.875em of
   pre, so pre takes the body size and code lands on tangled.org's 13px */
.markup .expressive-code pre {
  font-size: 0.9375rem;
}

/* no copy button on code blocks */
.expressive-code .copy {
  display: none;
}

/* starlight sizes the heading wrapper with its own scale, which the anchor link
   inherits; match each level to the heading markup.css gives it */
.markup .sl-heading-wrapper.level-h1 {
  font-size: 1.5rem;
}

.markup .sl-heading-wrapper.level-h2 {
  font-size: 1.25rem;
}

.markup .sl-heading-wrapper.level-h3 {
  font-size: 1rem;
}

.markup .sl-heading-wrapper:is(.level-h4, .level-h5, .level-h6) {
  font-size: 0.8125rem;
}

/* starlight lets inline code break anywhere; in a table that splits short
   identifiers mid-word, so keep them whole and let the table scroll instead */
.markup :is(td, th) code {
  overflow-wrap: normal;
  white-space: nowrap;
}

body {
  text-wrap-style: pretty;
}