/* The bar across the top of every page on the docs site.
 *
 * The home page and the site's own pages carry it from their templates. build-site.ts puts it into every
 * page Doxygen, TypeDoc, gcovr, and Vitest write. So it sits inside stylesheets it does not control, and it
 * sets its own colours, fonts, and spacing rather than inheriting them.
 *
 * The palette is the one in site.css. theme.js puts dark-mode or light-mode on the html element of every
 * page, and the bar reads that. With no script the system setting decides, as it does in site.css.
 */

.site-bar {
  --bar-paper: #fbfaf7;
  --bar-ink: #16151a;
  --bar-muted: #605c55;
  --bar-rule: #d8d4cb;
  --bar-signal: #b33100;

  position: relative;
  z-index: 100;
  box-sizing: border-box;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  width: 100%;
  margin: 0;
  padding: 8px 20px;
  background: var(--bar-paper);
  border: 0;
  border-bottom: 1.5px solid var(--bar-ink);
  color: var(--bar-ink);
  font:
    500 13px/1.2 'IBM Plex Mono',
    ui-monospace,
    'Cascadia Mono',
    Consolas,
    monospace;
  letter-spacing: normal;
  text-align: left;
  text-transform: none;
}

html.dark-mode .site-bar {
  --bar-paper: #1b1a1e;
  --bar-ink: #e4e1da;
  --bar-muted: #9a968e;
  --bar-rule: #2e2c33;
  --bar-signal: #ff4700;
}

@media (prefers-color-scheme: dark) {
  html:not(.light-mode) .site-bar {
    --bar-paper: #1b1a1e;
    --bar-ink: #e4e1da;
    --bar-muted: #9a968e;
    --bar-rule: #2e2c33;
    --bar-signal: #ff4700;
  }

  html:not(.light-mode) .site-bar .site-bar-version {
    color-scheme: dark;
  }
}

.site-bar *,
.site-bar *::before,
.site-bar *::after {
  box-sizing: border-box;
}

/* the link colours are marked important, since a tool's own link rules can carry an id and outrank these */
.site-bar a,
.site-bar a:link,
.site-bar a:visited {
  color: inherit !important;
  text-decoration: none;
  background: none;
  box-shadow: none;
}

.site-bar a:focus-visible,
.site-bar button:focus-visible {
  outline: 2px solid var(--bar-signal);
  outline-offset: 2px;
}

.site-bar-home {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.site-bar-home img {
  display: block;
  width: 22px;
  height: 22px;
  margin: 0;
}

.site-bar a.site-bar-home:hover {
  color: var(--bar-signal) !important;
}

/* the version picker beside the name, square like the theme toggle
   its font is pinned because Doxygen and TypeDoc both style form controls of their own */
.site-bar .site-bar-version {
  margin: 0;
  padding: 5px 6px;
  background: var(--bar-paper);
  border: 1.5px solid var(--bar-rule);
  border-radius: 0;
  color: var(--bar-ink);
  color-scheme: light;
  font-family: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace !important;
  font-size: 12px !important;
  line-height: 1.2 !important;
  cursor: pointer;
}

html.dark-mode .site-bar .site-bar-version {
  color-scheme: dark;
}

.site-bar .site-bar-version:hover:enabled {
  border-color: var(--bar-signal);
}

/* disabled until the list of versions loads, which a local build never has */
.site-bar .site-bar-version:disabled {
  color: var(--bar-muted);
  cursor: default;
  opacity: 1;
}

/* the links and the GitHub link pin their font, since Doxygen sets its own on every div inside #top */
.site-bar-links,
.site-bar .site-bar-links a,
.site-bar .site-bar-github {
  font-family: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace !important;
  font-size: 13px !important;
  line-height: 1.2 !important;
}

.site-bar-links {
  display: flex;
  flex: 1 1 auto;
  gap: 4px;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  /* a row that scrolls sideways clips top and bottom too, so it gets room for a link's focus ring, which
     sits 4px out, and gives it back in margin so the bar keeps its height */
  padding: 4px;
  margin: -4px;
}

.site-bar .site-bar-links a {
  padding: 6px 10px;
  border: 1.5px solid transparent;
  color: var(--bar-muted) !important;
  white-space: nowrap;
}

.site-bar .site-bar-links a:hover {
  color: var(--bar-signal) !important;
}

/* the section you are in is filled in, ink behind text the colour of the paper */
.site-bar .site-bar-links a[aria-current='location'] {
  background: var(--bar-ink) !important;
  border-color: var(--bar-ink);
  color: var(--bar-paper) !important;
}

/* the link to the repo, kept beside the toggle rather than in with the sections
   the mark is GitHub's own from Octicons, drawn in the text colour */
.site-bar .site-bar-github {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1.5px solid transparent;
  color: var(--bar-muted) !important;
  white-space: nowrap;
}

.site-bar .site-bar-github svg {
  display: block;
  width: 16px;
  height: 16px;
  flex: none;
  fill: currentColor;
}

.site-bar .site-bar-github:hover {
  color: var(--bar-signal) !important;
}

/* a square button like the watch's own, with a screen half lit */
.site-bar .theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 10px;
  background: var(--bar-paper);
  border: 1.5px solid var(--bar-ink);
  border-radius: 0;
  color: var(--bar-ink);
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.site-bar .theme-toggle:hover {
  border-color: var(--bar-signal);
  color: var(--bar-signal);
}

.site-bar .theme-toggle:active {
  transform: translate(1px, 1px);
}

.site-bar .theme-toggle svg {
  display: block;
  width: 14px;
  height: 14px;
  flex: none;
}

.site-bar .theme-toggle .theme-toggle-lit {
  fill: currentColor;
}

.site-bar .theme-toggle .edge {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

/* on a phone the logo replaces the name, and the links take a row of their own. they wrap rather than
   scroll, since a scrolling row hides its scrollbar and the last link was cut off with no sign of more */
@media (max-width: 640px) {
  .site-bar {
    padding: 8px 16px;
  }

  /* hidden from sight but still read out, since it is the only name the home link has */
  .site-bar-home span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .site-bar-links {
    order: 3;
    flex-basis: 100%;
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .site-bar .site-bar-github {
    margin-left: auto;
  }
}