/* Our additions to mdBook's theme (docs/specs/site.md §6): contrast where a
   theme falls short of WCAG 2.2 AA, a focus ring everyone can see, a skip
   link, and the footer. Nothing here is loaded from another site. */

/* A visible focus ring, at least 2 px, on every link and control. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--links);
  outline-offset: 2px;
  border-radius: 2px;
}

/* "Skip to the content": first in the page, shown when focused. */
.skip-link {
  position: absolute;
  left: 8px;
  top: -48px;
  z-index: 1000;
  padding: 8px 14px;
  background: var(--bg);
  color: var(--links);
  border: 2px solid var(--links);
  border-radius: 4px;
  font-weight: 600;
}
.skip-link:focus {
  top: 8px;
}

/* The sidebar's links are at least 24 px tall (WCAG 2.5.8, target size):
   mdBook draws them 21 px, with less than 24 px between some of them. */
.chapter li a {
  display: inline-block;
  min-height: 24px;
  padding-block: 2px;
  box-sizing: border-box;
}

/* Links in running text are underlined, so they don't rely on color alone
   (WCAG 1.4.1). */
.content main a:not(.header):not(.footnote-reference) {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Contrast: mdBook's light theme draws quiet text and some links lighter
   than 4.5:1 on white; these are the darkest of its own hues that pass. */
.light,
html:not(.js) {
  --links: #1f5fa8;
  --sidebar-fg: #2b2b2b;
  --sidebar-non-existant: #6b6b6b;
  --sidebar-active: #1f5fa8;
  --icons: #5c5c5c;
  --icons-hover: #1b1b1b;
  --searchresults-header-fg: #555;
  --blockquote-border: #8a8a8a;
}

.navy {
  --links: #8ec5ff;
  --sidebar-active: #8ec5ff;
  --icons: #b3b8c3;
  --sidebar-non-existant: #a3aab6;
  --searchresults-header-fg: #c4c9d2;
}

/* The dark themes' code colors: their red is 4.46:1 on the code background,
   just under AA; this one is above 5.5:1. */
.navy .hljs-attr, .navy .hljs-variable, .navy .hljs-template-variable,
.navy .hljs-tag, .navy .hljs-name, .navy .hljs-selector-id,
.navy .hljs-selector-class, .navy .hljs-regexp, .navy .hljs-deletion,
.coal .hljs-attr, .coal .hljs-variable, .coal .hljs-template-variable,
.coal .hljs-tag, .coal .hljs-name, .coal .hljs-selector-id,
.coal .hljs-selector-class, .coal .hljs-regexp, .coal .hljs-deletion {
  color: #e78c8c;
}

/* The footer on every page: the policy and the privacy statement. */
.site-footer {
  margin-top: 3em;
  padding-top: 1em;
  border-top: 1px solid var(--table-border-color);
  font-size: 0.9em;
}

/* Tables of files and keys read better without wrapping their first
   column. */
.content table td:first-child code {
  white-space: nowrap;
}