/* colour.css
 *
 * Page colour grammar and the shared 2px focus ring (offset 0).
 * Rings with another offset stay on the component.
 */

body {
  color: var(--color-text-primary);
  background-color: var(--color-surface-page);
}

.card-header,
.panel-heading,
.modal-header,
.list-header,
.well-sm {
  background-color: var(--color-surface-mid);
  border-color: var(--color-stroke-weak);
  box-shadow: none;
}

.shadow,
.shadow-sm,
.shadow-lg,
.dropdown-menu,
.btn:not(.btn-close),
.form-control,
.form-select,
.navbar,
nav#navbar-main {
  box-shadow: none;
}

.email-body blockquote,
.email-body pre,
.email-body .quoted-switch,
.email .quoted-text,
pre,
blockquote {
  background-color: var(--color-surface-mid);
  border-color: var(--color-stroke-weak);
  box-shadow: none;
}

/* Zero weight in every state: a Component that colours its links owns
   their hover and focus too. */
:where(a:not(.btn, .nav-link, .page-link, .dropdown-item, .navbar-brand, .badge, .close, .btn-close)) {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition:
    color 150ms ease,
    background-color 150ms ease,
    border-color 150ms ease;
}

:where(a:not(.btn, .nav-link, .page-link, .dropdown-item, .navbar-brand, .badge, .close, .btn-close):is(:hover, :focus-visible)) {
  color: var(--color-text-link-accent);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:not(.btn):focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

a:not(.btn):focus-visible,
.btn:not(.btn-close):focus-visible,
.page-link:focus-visible,
.navbar-toggler:focus-visible {
  outline: 2px solid var(--color-stroke-link-accent);
  outline-offset: 0;
}

.footer a {
  color: var(--color-text-primary);
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--color-text-link-accent);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}