/* ==========================================================================
   Header – Hauptnavigation und Logo-Bereich
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(30, 58, 95, 0.6);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.is-scrolled {
  background-color: rgba(30, 58, 95, 0.85);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ── Logo ───────────────────────────────────────────────────────────────── */

.header__logo {
  display: flex;
  align-items: center;
}

.header__logo-img {
  height: 50px;
  width: auto;
  display: block;
}

/* ── Desktop-Navigation ─────────────────────────────────────────────────── */

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text-on-dark);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav__link.is-active {
  background-color: rgba(255, 255, 255, 0.15);
}

/* ── CTA im Header ─────────────────────────────────────────────────────── */

.header__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-lg);
  background-color: var(--color-accent);
  color: var(--color-text-on-dark);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  margin-left: var(--spacing-md);
}

.header__cta:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* ── Burger-Button (Mobil) ──────────────────────────────────────────────── */

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: 1010;
}

.burger__line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-on-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.burger.is-active .burger__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.burger.is-active .burger__line:nth-child(2) {
  opacity: 0;
}

.burger.is-active .burger__line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Navigation ──────────────────────────────────────────────────── */

@media (max-width: 992px) {
  .burger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: rgba(21, 44, 72, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-left: 1px solid rgba(255, 255, 255, 0.06);
    padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-xl) var(--spacing-xl);
    transition: right var(--transition-base);
    z-index: 1005;
    overflow-y: auto;
  }

  .nav.is-open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-xs);
  }

  .nav__link {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border-radius: var(--radius-md);
  }

  .header__cta {
    margin-left: 0;
    margin-top: var(--spacing-md);
    text-align: center;
    justify-content: center;
    width: 100%;
  }

  /* Overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1004;
  }

  .nav-overlay.is-visible {
    display: block;
  }
}