/* Header-Navigation: Desktop-Scroll + Mobile-Drawer */

body.header-nav-menu-open {
  overflow: hidden;
}

.header-nav-area {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.header-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  margin-right: 4px;
  flex-shrink: 0;
  border: 1px solid var(--ac-border);
  border-radius: var(--ac-radius);
  background: rgba(255, 255, 255, 0.04);
  color: var(--ac-text-secondary);
  cursor: pointer;
  transition: background var(--ac-transition), color var(--ac-transition), border-color var(--ac-transition);
}

.header-nav-toggle:hover {
  color: var(--ac-text);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--ac-border-hover);
}

.header-nav-toggle-icon-close {
  display: none;
}

.app-header.nav-menu-open .header-nav-toggle-icon-menu {
  display: none;
}

.app-header.nav-menu-open .header-nav-toggle-icon-close {
  display: block;
}

.header-nav-backdrop {
  display: none;
}

/* Schmale Desktop-Fenster: horizontale Leiste mit Touch-Scroll */
@media (min-width: 992px) {
  .header-nav {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(136, 169, 195, 0.45) transparent;
    max-width: 100%;
    justify-content: flex-start;
    mask-image: linear-gradient(to right, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
  }

  .header-nav::-webkit-scrollbar {
    height: 4px;
  }

  .header-nav::-webkit-scrollbar-thumb {
    background: rgba(136, 169, 195, 0.45);
    border-radius: 4px;
  }
}

@media (min-width: 992px) and (max-width: 1280px) {
  .header-brand-sub {
    display: none;
  }

  #header-brand-title {
    font-size: 14px;
    letter-spacing: 1px;
  }

  .nav-item span {
    display: none;
  }

  .nav-item {
    padding: 8px 10px;
  }

  .header-nav {
    gap: 2px;
    padding: 0 8px;
  }
}

/* Tablet / Mobile: Off-Canvas-Menü */
@media (max-width: 991px) {
  .app-header {
    padding: 0 12px;
    gap: 8px;
  }

  .header-brand {
    flex: 1 1 auto;
    min-width: 0;
  }

  .header-brand-sub {
    display: none;
  }

  #header-brand-title {
    font-size: 13px;
    letter-spacing: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .header-nav-area {
    flex: 0 0 auto;
    justify-content: flex-start;
  }

  .header-nav-toggle {
    display: flex;
  }

  .header-nav {
    position: fixed;
    top: var(--ac-header-height);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 160;
    margin: 0;
    padding: 12px 16px 24px;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 4px;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--ac-bg-elevated);
    border-top: 1px solid var(--ac-border);
    box-shadow: var(--ac-shadow-lg);
    transform: translateX(-105%);
    visibility: hidden;
    transition: transform 0.22s ease, visibility 0.22s ease;
    -webkit-overflow-scrolling: touch;
  }

  .app-header.nav-menu-open .header-nav {
    transform: translateX(0);
    visibility: visible;
  }

  .header-nav-backdrop {
    display: block;
    position: fixed;
    top: var(--ac-header-height);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 155;
    background: rgba(0, 31, 61, 0.55);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.22s ease, visibility 0.22s ease;
  }

  .app-header.nav-menu-open .header-nav-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-item {
    width: 100%;
    padding: 12px 14px;
    font-size: 14px;
    border-radius: var(--ac-radius);
  }

  .nav-item span {
    display: inline;
  }

  .nav-item.active::after {
    display: none;
  }

  .nav-item.active {
    border-left: 3px solid var(--ac-accent);
    padding-left: 11px;
  }

  #header-username {
    display: none;
  }

  .header-user {
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .header-chevron {
    display: none;
  }
}