/* AIS Insights page chrome: header with logo, navigation and language switch, and the
 * footer. The same on every page (handoff: "Alle Unterseiten nutzen denselben Header
 * und Footer").
 */

/* --- logo ------------------------------------------------------------------- */

/* Variant B (DECISIONS.md 6): the official emblem, a 1 px gold rule, "Insights" in
   Merriweather Light and a 7 px gold square, measured against the 19 Oct target. */
.brand {
  --brand-h: 46px;
  --brand-rule-h: 40px;
  --brand-gap: 14px;
  --brand-word: 30px;
  --brand-pixel: 7px;
  display: inline-flex;
  align-items: center;
  gap: var(--brand-gap);
  min-height: var(--tap);
  color: var(--c-navy);
  text-decoration: none;
  /* a logo does not mirror in right-to-left pages */
  direction: ltr;
}

.brand__emblem {
  display: block;
  width: auto;
  height: var(--brand-h);
}

.brand__rule {
  width: var(--rule);
  height: var(--brand-rule-h);
  background: var(--c-gold);
}

.brand__word {
  font: var(--fw-display) var(--brand-word) / 1 var(--f-serif);
  color: var(--c-navy);
}

/* sits about 8 px after the word and just above its cap line */
.brand__pixel {
  align-self: flex-start;
  width: var(--brand-pixel);
  height: var(--brand-pixel);
  margin-top: 8px;
  margin-left: -6px;
  background: var(--c-gold);
}

.brand:hover .brand__word {
  color: var(--c-navy-hover);
}

.on-navy .brand__word {
  color: var(--c-white);
}

/* --- header ----------------------------------------------------------------- */

.site-header {
  background: var(--c-cream);
  border-bottom: var(--rule) solid var(--c-line);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3) var(--s-5);
  padding-block: 18px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3) var(--s-5);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap);
  min-height: var(--tap);
  color: var(--c-navy);
  font: var(--fw-semibold) var(--fs-nav) / 1 var(--f-sans);
  text-decoration: none;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--c-navy);
  text-decoration-line: underline;
  text-decoration-thickness: var(--rule-accent);
  text-underline-offset: 0.55em;
}

.site-nav__link:hover {
  text-decoration-color: var(--c-line-strong);
}

/* the active item: 3 px gold underline */
.site-nav__link[aria-current="page"] {
  text-decoration-color: var(--c-gold);
}

.site-nav__cta[aria-current="page"] {
  outline: var(--rule-accent) solid var(--c-gold);
  outline-offset: var(--focus-offset);
}

/* --- language switch --------------------------------------------------------- */

.lang-switch {
  position: relative;
}

.lang-switch > summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: var(--tap);
  padding: 0 12px;
  border: var(--rule) solid var(--c-line-strong);
  color: var(--c-ink);
  font: var(--fw-semibold) var(--fs-nav) / 1 var(--f-sans);
  list-style: none;
  cursor: pointer;
}

.lang-switch > summary::-webkit-details-marker {
  display: none;
}

.lang-switch > summary:hover {
  border-color: var(--c-navy);
}

.lang-switch__caret {
  width: 0;
  height: 0;
  border-inline: 4px solid transparent;
  border-top: 5px solid currentColor;
}

.lang-switch[open] .lang-switch__caret {
  transform: rotate(180deg);
}

.lang-switch__menu {
  position: absolute;
  z-index: 30;
  top: calc(100% + var(--s-1));
  inset-inline-end: 0;
  min-width: 220px;
  margin: 0;
  padding: var(--s-2) 0;
  list-style: none;
  background: var(--c-paper);
  border: var(--rule) solid var(--c-line-strong);
}

.lang-switch__menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  min-height: var(--tap);
  padding: 0 var(--s-4);
  color: var(--c-ink);
  font-size: var(--fs-meta);
  text-decoration: none;
}

.lang-switch__menu a:hover {
  background: var(--c-sand);
  color: var(--c-navy);
}

.lang-switch__menu a[aria-current="true"] {
  color: var(--c-navy);
  font-weight: var(--fw-bold);
}

.lang-switch__code {
  color: var(--c-muted);
  font-size: var(--fs-small);
  text-transform: uppercase;
}

/* --- menu button (phones) ---------------------------------------------------- */

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--s-2);
  min-height: var(--tap);
  padding: 0 var(--s-3);
  background: transparent;
  border: var(--rule) solid var(--c-line-strong);
  color: var(--c-navy);
  font-weight: var(--fw-semibold);
  cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
}

.nav-toggle__bars::before {
  top: -6px;
}

.nav-toggle__bars::after {
  top: 6px;
}

/* Below 700 px the navigation folds into a menu (handoff, Responsive). Without
   JavaScript it stays open, so it can never become unreachable. */
@media (max-width: 699px) {
  .brand {
    --brand-h: 38px;
    --brand-rule-h: 33px;
    --brand-gap: 11px;
    --brand-word: 25px;
    --brand-pixel: 6px;
  }

  .site-header__inner {
    padding-block: var(--s-3);
  }

  .js .nav-toggle {
    display: inline-flex;
  }

  .js .site-nav {
    display: none;
  }

  .js .site-header.is-open .site-nav {
    display: flex;
  }

  .site-nav {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding-block: var(--s-2) var(--s-3);
    border-top: var(--rule) solid var(--c-line);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__link {
    justify-content: flex-start;
    width: 100%;
    border-bottom: var(--rule) solid var(--c-line);
  }

  .site-nav__link[aria-current="page"] {
    text-underline-offset: 0.35em;
  }

  .lang-switch__menu {
    position: static;
    margin-top: var(--s-2);
  }

  .site-nav__cta {
    width: 100%;
  }
}

/* --- footer ----------------------------------------------------------------- */

.site-footer {
  background: var(--c-cream);
  border-top: var(--rule) solid var(--c-line);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: var(--s-6) var(--s-8);
  padding-block: 56px var(--s-7);
}

.site-footer__wordmark {
  display: block;
  width: 260px;
  max-width: 100%;
  height: auto;
}

.site-footer__blurb {
  margin: var(--s-4) 0 0;
  color: var(--c-muted);
  font-size: var(--fs-meta);
}

.site-footer__nav ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0 var(--s-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__nav a {
  display: inline-flex;
  align-items: center;
  min-width: var(--tap);
  min-height: var(--tap);
  color: var(--c-navy);
  font-size: var(--fs-meta);
}

.site-footer__bottom {
  border-top: var(--rule) solid var(--c-line);
  color: var(--c-muted);
  font-size: var(--fs-small);
}

.site-footer__bottom .container {
  padding-block: 18px;
}

@media (max-width: 699px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    padding-block: var(--s-7) var(--s-6);
  }
}

/* --- main ------------------------------------------------------------------- */

main:focus {
  outline: none;
}

/* --- toast (copy link) --------------------------------------------------------- */

.toast {
  position: fixed;
  z-index: 50;
  bottom: var(--s-6);
  left: 50%;
  transform: translateX(-50%);
  max-width: calc(100vw - 2 * var(--gutter));
  padding: var(--s-3) var(--s-5);
  background: var(--c-navy);
  color: var(--c-white);
  font-size: var(--fs-meta);
  font-weight: var(--fw-semibold);
}

.toast--error {
  background: var(--c-error);
}