/* ==========================================================================
   layout.css – Header, Navigation, Footer
   ========================================================================== */

/* --- Marke ------------------------------------------------------------ */
.brand__name {
  font-family: var(--font-display);
  font-weight: var(--fw-heading-strong);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 1.0625rem;
  color: var(--color-heading);
  white-space: nowrap;
}
.brand__name--lg { font-size: 1.25rem; letter-spacing: 0.16em; }

/* --- Site-Header ------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 86%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
  padding-top: env(safe-area-inset-top);
}
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--color-bg) 96%, transparent);
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-h);
}

/* --- Hauptnavigation (Desktop) --------------------------------------- */
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.25rem);
  list-style: none;
  margin: 0;
  padding: 0;
}
.primary-nav__list a {
  position: relative;
  font-family: var(--font-display);
  font-weight: var(--fw-nav);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding-block: 0.5rem;
  transition: color var(--transition);
}
.primary-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.primary-nav__list a:hover,
.primary-nav__list a:focus-visible { color: var(--color-heading); }
.primary-nav__list a:hover::after,
.primary-nav__list a.is-active::after { transform: scaleX(1); }
.primary-nav__list a.is-active { color: var(--color-heading); }

/* --- Hamburger-Button ------------------------------------------------ */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  z-index: 120;
  flex-shrink: 0;   /* darf nicht vom Markennamen verdrängt werden */
}
.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-heading);
  border-radius: 2px;
  transition: opacity var(--transition);
}
/* Schließen-X: zwei zentrierte Linien, die sich exakt in der Mitte kreuzen –
   robust, unabhängig von Strichabstand/Translate der Hamburger-Balken */
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 2px;
  background: var(--color-heading);
  border-radius: 2px;
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: opacity var(--transition), transform var(--transition);
}

/* --- Mobile Navigation ------------------------------------------------ */
@media (max-width: 800px) {
  .nav-toggle { display: flex; }

  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: 110;
    display: grid;
    place-items: center;
    background: color-mix(in srgb, var(--color-bg) 97%, transparent);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition),
      visibility var(--transition);
    padding: max(env(safe-area-inset-top), 1rem) 1rem 1rem;
  }
  .primary-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .primary-nav__list {
    flex-direction: column;
    gap: clamp(1.25rem, 4vh, 2.25rem);
    text-align: center;
  }
  .primary-nav__list a { font-size: 1.5rem; letter-spacing: 0.14em; }

  /* Hamburger → X: Balken ausblenden, zentriertes Pseudo-X einblenden */
  body.nav-open .nav-toggle__bar { opacity: 0; }
  body.nav-open .nav-toggle::before { opacity: 1; transform: translate(-50%, -50%) rotate(45deg); }
  body.nav-open .nav-toggle::after  { opacity: 1; transform: translate(-50%, -50%) rotate(-45deg); }

  body.nav-open { overflow: hidden; }

  /* Wichtig: Der backdrop-filter des Headers macht ihn zum Containing-Block für
     position:fixed-Kinder – dadurch deckt das Overlay sonst nur den Header-Bereich
     ab (Hintergrund fehlt, Links laufen über den Seiteninhalt). Beim offenen Menü
     daher abschalten, damit .primary-nav sich wieder aufs Viewport bezieht. */
  body.nav-open .site-header {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}

/* --- Footer ----------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6) var(--space-4);
  padding-bottom: max(var(--space-4), env(safe-area-inset-bottom));
  margin-top: var(--space-5);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-4) var(--space-5);
  align-items: start;
}
.site-footer__brand { grid-column: 1; }
.site-footer__tagline {
  margin-top: var(--space-2);
  color: var(--color-text-dim);
  font-size: var(--fs-300);
}
.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  list-style: none;
  padding: 0;
}
.site-footer__nav a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  transition: color var(--transition);
}
.site-footer__nav a:hover { color: var(--color-accent); }

.site-footer__social {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
}
.site-footer__social-label {
  font-size: var(--fs-300);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-dim);
}
.site-footer__social ul {
  display: flex;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}
.site-footer__social a {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--brand, var(--color-text-muted));   /* Icon in Markenfarbe */
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.site-footer__social a:hover {
  background: var(--brand, var(--color-accent));
  color: #fff;
  transform: translateY(-2px);
}
.site-footer__copy {
  grid-column: 1 / -1;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-300);
  color: var(--color-text-dim);
}

@media (max-width: 640px) {
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__social {
    grid-column: 1;
    grid-row: auto;
    align-items: flex-start;
  }
}