/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(8, 11, 18, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav.scrolled {
  background: rgba(8, 11, 18, 0.92);
  border-bottom-color: rgba(255, 255, 255, 0.09);
}

.nav__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.nav__logo img {
  height: 60px;
  width: auto;
  flex-shrink: 0;
}

/* Menü mittig zwischen Logo (links) und Buttons (rechts):
   absolut zentriert, damit es unabhängig von Logo-/Button-Breite
   exakt in der Header-Mitte sitzt. */
.nav__menu {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-btn);
  transition: color var(--transition);
}

.nav__link:hover { color: var(--text-primary); }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile overlay — Fullscreen, direktes Body-Kind (§9 R7, v9).
   z-index ÜBER der Nav (100), bezieht sich aufs Viewport (100dvh). */
.nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  height: 100dvh;
  overflow: hidden;
  background: rgba(8, 11, 18, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 120;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}

.nav__overlay.open {
  opacity: 1;
  pointer-events: all;
}

/* Eigener Schließen-Button (44×44), da das Overlay den Burger verdeckt */
.nav__overlay__close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.8rem;
  line-height: 1;
}

.nav__overlay .nav__link {
  font-size: 1.75rem; /* §9: Burger-Links Syne 28px/600 */
  font-weight: 600;
  font-family: var(--font-headline);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
}

/* Scroll-Lock solange das Overlay offen ist (per Klasse, §9 R7) */
body.nav-open {
  overflow: hidden;
}

/* ── Footer (§10) ── */
.footer {
  padding: 48px 0;
  background: rgba(8, 11, 18, 0.85);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-md);
}
.footer__meta,
.footer__sub {
  text-align: right;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}

.footer__logo img { height: 48px; width: auto; flex-shrink: 0; }

.footer__sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
}

.footer__links a {
  font-size: 14px;
  opacity: 0.7;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color var(--transition), opacity var(--transition);
}

.footer__links a:hover { color: #ECEEF2; opacity: 1; }

.footer__meta {
  font-size: 13px;
  color: var(--text-secondary);
  opacity: 0.45;
}

/* ── Section spacing ── */
section {
  padding: var(--space-2xl) 0;
}