/* header.css — Site-Header, Nav, Sprachumschalter, Mobile-Slide-in
   Verhalten lt. docs/animation-notes.md:
   - sticky, solide cremefarbene Leiste (isEnableSticky=true, isEnableOverSection=false)
   - Mobile-Breakpoint 1200px (Bootstrap navbar-expand-xl)
   - Menü: Slide-in-Panel von links, 0.5s ease-out */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: var(--header-h);
  padding-inline: clamp(1rem, 3vw, 3.5rem);
  background: var(--color-cream);
  border-bottom: 1px solid var(--color-line);
  transition: box-shadow 0.3s var(--ease);
}
.site-header--scrolled {
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
}

/* Logo */
.site-header__logo {
  flex: 0 0 auto;
  display: block;
}
.site-header__logo img {
  height: 62px;
  width: auto;
}

/* Desktop-Nav */
.site-header__nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
}
.site-header__menu {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-inline: auto;
}
.site-header__link {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 0.55em 1em;
  border-radius: 999px;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.site-header__link:hover {
  color: var(--color-accent-strong);
}
.site-header__link.is-active,
.site-header__link.is-active:hover {
  background: var(--color-accent);
  color: #fff;
}

/* Sprachumschalter (No-JS via <details>) */
.site-header__langs {
  flex: 0 0 auto;
}
.langswitch {
  position: relative;
}
.langswitch__current {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  padding: 0.45em 0.7em;
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.langswitch__current::-webkit-details-marker {
  display: none;
}
.langswitch__current .icon--chevron {
  transition: transform 0.2s var(--ease);
}
.langswitch[open] .langswitch__current .icon--chevron {
  transform: rotate(180deg);
}
.langswitch__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 100%;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  z-index: 10;
}
.langswitch__menu a {
  display: block;
  padding: 0.5em 1.2em;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--color-primary);
}
.langswitch__menu a:hover {
  background: var(--color-cream);
  color: var(--color-accent-strong);
}
.langswitch__menu a.is-active {
  color: var(--color-accent);
}

/* Burger (nur Mobile + JS) */
.site-header__burger {
  display: none;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
}
.site-header__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

/* Backdrop (nur Mobile + JS) */
.site-header__backdrop {
  display: none;
}

/* =====================================================================
   Mobile (< 1200px) — Bootstrap-xl-Breakpoint
   ===================================================================== */
@media (max-width: 1199px) {
  .site-header {
    flex-wrap: wrap;
    height: auto;
    min-height: var(--header-h);
    padding-block: 0.6rem;
    row-gap: 0.5rem;
    gap: 1rem;
  }
  .site-header__logo {
    margin-inline: auto;
  }
  .site-header__logo img {
    height: 52px;
  }

  /* --- No-JS-Fallback: Menü sichtbar & gestapelt unter der Leiste --- */
  .site-header__nav {
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
  }
  .site-header__menu {
    flex-direction: column;
    width: 100%;
    margin: 0;
  }
  .site-header__link {
    display: block;
    width: 100%;
    text-align: center;
    border-radius: 0;
    padding: 0.7em 1em;
  }
  .site-header__langs {
    margin-top: 0.5rem;
  }

  /* --- Mit JS: Burger + Slide-in-Panel von links --- */
  .js-enabled .site-header {
    flex-wrap: nowrap;
    height: var(--header-h);
    padding-block: 0;
  }
  .js-enabled .site-header__burger {
    display: flex;
    order: 0;
  }
  .js-enabled .site-header__logo {
    order: 1;
  }

  .js-enabled .site-header__nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(85vw, 360px);
    flex-basis: auto;
    align-items: stretch;
    gap: 0;
    padding: calc(var(--header-h) + 1rem) 1.5rem 2rem;
    background: var(--color-cream);
    box-shadow: 2px 0 30px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%);
    /* Panel ist zu -> per Tastatur nicht fokussierbar/erreichbar. */
    visibility: hidden;
    overflow-y: auto;
    z-index: 120;
  }
  /* Transition erst scharf schalten, wenn nav.mjs nach dem ersten Rendern
     `nav-ready` setzt (siehe nav.mjs) — verhindert, dass der Browser die
     initiale Zustandsänderung von No-JS-sichtbar auf JS-verborgen als
     animierten Slide interpretiert. Visibility wird beim Schließen erst
     nach Ende des Slide-outs umgeschaltet (delay = Slide-Dauer), beim
     Öffnen sofort (0s, höhere Spezifität unten überschreibt den Delay). */
  .nav-ready .site-header__nav {
    transition: transform 0.5s ease-out, visibility 0s 0.5s;
  }
  .js-enabled .site-header--open .site-header__nav {
    transform: translateX(0);
    visibility: visible;
  }
  .nav-ready .site-header--open .site-header__nav {
    transition: transform 0.5s ease-out, visibility 0s;
  }
  .js-enabled .site-header__menu {
    align-items: stretch;
  }
  .js-enabled .site-header__link {
    text-align: left;
    border-radius: 0;
    border-bottom: 1px solid var(--color-line);
  }
  .js-enabled .site-header__langs {
    margin-top: 1.25rem;
  }

  /* Burger -> X */
  .js-enabled .site-header--open .site-header__burger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .js-enabled .site-header--open .site-header__burger span:nth-child(2) {
    opacity: 0;
  }
  .js-enabled .site-header--open .site-header__burger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Backdrop */
  .js-enabled .site-header__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
  }
  .js-enabled .site-header--open .site-header__backdrop {
    opacity: 1;
    visibility: visible;
  }
}

/* Scroll-Lock, wenn Mobile-Menü offen (JS setzt html.nav-open) */
html.nav-open {
  overflow: hidden;
}