/* kuva docs — shared site-wide styles, layered on top of mdBook's default
   theme via `additional-css` (see `book.toml`). Started life as the inline
   <style> block on gallery.md; pulled out here so every page can use the
   same card-grid treatment as the redesign progresses. */

/* ── Brand accent ──────────────────────────────────────────────────────────
   A teal accent, distinct from every built-in mdBook theme's own accent
   (light/coal/navy all lean blue, rust/ayu lean orange) so it reads as
   kuva's own identity rather than clashing with whichever theme the reader
   has picked. Defined per theme selector — not a flat override — so it still
   has enough contrast against each theme's background; darker teal on the
   light backgrounds (light, rust), brighter teal on the dark ones
   (coal, navy, ayu). */
:root {
  --kuva-accent: #0d9488;
  --kuva-accent-soft: rgba(13, 148, 136, 0.12);
}
.coal, .navy, .ayu {
  --kuva-accent: #2dd4bf;
  --kuva-accent-soft: rgba(45, 212, 191, 0.14);
}

/* ── Headings ────────────────────────────────────────────────────────────
   Subtle structure cues, not a font change — mdBook's bundled "Open Sans"
   stack stays as-is (self-hosted, no network dependency, matches the
   library's own bundled-font philosophy). mdBook renders *two* <h1>s per
   page: the sticky top-bar site title (`<h1 class="menu-title">kuva</h1>`,
   present on every page) and the page's own content title (e.g. `<h1
   id="gallery">Gallery</h1>`). The accent bar belongs only on the latter —
   on the sticky menu title it repeated on every single page and read as too
   heavy — so this scopes to `main h1` and explicitly excludes `.menu-title`. */
main h1:not(.menu-title) {
  border-bottom: 2px solid var(--kuva-accent);
  padding-bottom: 0.3em;
}
h2 {
  border-left: 4px solid var(--kuva-accent);
  padding-left: 0.6em;
}

/* ── Collapsible sidebar categories ─────────────────────────────────────────
   Behavior lives in `theme/custom.js` (mdBook's own expand/collapse only
   covers nested chapters like the CLI subcommand list, not these flat
   `# Category` part-titles). This just renders the two states it toggles:
   a rotating chevron on the part-title, and `display: none` on the
   category's items while collapsed. */
li.part-title.kuva-toggle {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 1.4em;
}
li.part-title.kuva-toggle::after {
  content: "\276F"; /* ❯ */
  position: absolute;
  right: 0.4em;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7em;
  color: var(--kuva-accent);
  transition: transform 0.15s;
}
li.part-title.kuva-toggle.kuva-open::after {
  transform: translateY(-50%) rotate(90deg);
}
.chapter-item.kuva-collapsed {
  display: none;
}

/* ── Search UI ────────────────────────────────────────────────────────────
   Two presentations of the same single search input (behavior lives in
   `theme/custom.js`): a compact always-visible box at the top of the
   sidebar on every normal page, and a full-width version on the dedicated
   `search.html` page for reading through result stubs without the sidebar's
   width squeeze. The top-bar icon now navigates to that page instead of
   toggling the sidebar box in place. */
#mdbook-sidebar #mdbook-search-wrapper {
  position: relative;
  z-index: 1;
  max-width: none;
  padding: 0.75rem 0.75rem 0;
  background-color: var(--sidebar-bg);
}
#mdbook-sidebar #mdbook-search-wrapper.hidden {
  /* mdBook's `.hidden` rule is itself `display: none !important;` — has to
     be beaten with `!important` too, specificity/source order can't win
     against it. */
  display: block !important;
}
#mdbook-sidebar .searchbar-outer,
#mdbook-sidebar .searchresults-outer {
  max-width: none;
}
#mdbook-sidebar .sidebar-scrollbox {
  top: var(--kuva-search-height, 0px);
}

#kuva-fullpage-search-slot {
  margin-top: 1rem;
}
#mdbook-search-wrapper.kuva-fullpage-search {
  position: static;
}
#mdbook-search-wrapper.kuva-fullpage-search.hidden {
  /* Overrides the sidebar rule's `!important` the same way — this version
     is never toggled away either, since the whole point of this page is
     to search. */
  display: block !important;
}
#mdbook-search-wrapper.kuva-fullpage-search .searchbar-outer,
#mdbook-search-wrapper.kuva-fullpage-search .searchresults-outer {
  max-width: var(--content-max-width);
}
#mdbook-search-wrapper.kuva-fullpage-search #mdbook-searchbar {
  font-size: 1.1rem;
  padding: 14px 18px;
}

/* ── Tables ──────────────────────────────────────────────────────────────
   mdBook's own `table { margin: 0 auto }` centers each table as a whole
   block. Harmless for one table on its own, but pages that stack several
   short tables in a row (cli/index.md's per-category subcommand tables,
   flag-reference tables throughout the plot pages) end up with each one
   independently centered at a different width, so nothing lines up on the
   left. Left-align the block and its header text instead. */
table {
  margin: 0;
}
table thead th {
  text-align: left;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.gallery-card {
  border: 1px solid var(--sidebar-bg, #e0e0e0);
  border-top: 3px solid var(--kuva-accent);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.15s, transform 0.15s;
}
.gallery-card:hover {
  box-shadow: 0 6px 16px var(--kuva-accent-soft), 0 2px 6px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}
.gallery-card a {
  display: block;
  text-decoration: none;
  color: inherit;
}
.gallery-card img {
  width: 100%;
  height: auto;
  display: block;
}
.gallery-caption {
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  font-size: 0.9rem;
}
.gallery-desc {
  padding: 0 0.75rem 0.6rem;
  font-size: 0.8rem;
  color: var(--fg, #555);
  opacity: 0.8;
}