/* =============================================
   NAVIGATION MODULE
   ============================================= */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

.nav--scrolled {
  box-shadow: var(--shadow-md);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo img {
  height: 44px;
  width: auto;
  transition: height var(--transition-base);
}

/* Menu */
.nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 1rem;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--green-dark);
  background: var(--green-pale);
}

.nav__link--active {
  color: var(--green-dark);
  font-weight: 600;
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--copper);
  border-radius: 1px;
}

.nav__item {
  position: relative;
}

/* Chevron */
.nav__chevron {
  transition: transform var(--transition-fast);
}

.nav__item--dropdown:hover .nav__chevron,
.nav__item--dropdown.is-open .nav__chevron {
  transform: rotate(180deg);
}

/* Dropdown */
.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.nav__item--dropdown:hover .nav__dropdown,
.nav__item--dropdown.is-open .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: 0.7rem 1rem;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.nav__dropdown-link:hover {
  background: var(--green-pale);
  color: var(--green-dark);
}

.nav__dropdown-link--active {
  color: var(--green-dark);
  font-weight: 600;
  background: var(--green-pale);
}

/* Sub-Dropdown (z.B. Selbstauskunft unter Baufinanzierung) */
.nav__dropdown-parent {
  position: relative;
}

.nav__dropdown-parent > .nav__dropdown-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__sub-chevron {
  transition: transform var(--transition-fast);
  opacity: 0.5;
}

.nav__dropdown-parent:hover > .nav__dropdown-link .nav__sub-chevron,
.nav__dropdown-parent--open > .nav__dropdown-link .nav__sub-chevron {
  opacity: 1;
  transform: rotate(180deg);
}

.nav__subdropdown {
  list-style: none;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.nav__dropdown-parent:hover > .nav__subdropdown,
.nav__dropdown-parent--open > .nav__subdropdown {
  max-height: 200px;
}

.nav__subdropdown .nav__dropdown-link {
  padding-left: 2rem;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.nav__subdropdown .nav__dropdown-link:hover {
  color: var(--green-dark);
}

/* Burger Button */
.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}

.nav__burger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--green-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Burger active state */
.nav__burger--active .nav__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__burger--active .nav__burger-line:nth-child(2) {
  opacity: 0;
}

.nav__burger--active .nav__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* === MOBILE === */
@media (max-width: 767px) {
  .nav__burger {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: var(--bg-primary);
    padding: 1.5rem;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    z-index: 999;
  }

  .nav__menu--open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    gap: 0;
    align-items: stretch;
  }

  .nav__link {
    padding: 1rem;
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--border-color);
  }

  .nav__link--active::after {
    display: none;
  }

  .nav__link--active {
    border-left: 3px solid var(--copper);
    background: var(--green-pale);
  }

  /* Dropdown mobile: flat list, indented */
  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0;
    padding-left: 1rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .nav__item--dropdown.is-open .nav__dropdown {
    max-height: 400px;
  }

  .nav__dropdown-link {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav__subdropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0;
    padding-left: 1rem;
    min-width: auto;
  }

  .nav__sub-chevron {
    display: none;
  }
}

/* === TABLET === */
@media (min-width: 768px) and (max-width: 1199px) {
  .nav__link {
    padding: 0.5rem 0.6rem;
    font-size: var(--font-size-xs);
  }

  .nav__logo img {
    height: 38px;
  }
}