/* css/navbar.css
   Styles fuer die hierarchische Navigationsleiste (Gruppen, Dropdowns, Burger).
   Basis-Regeln (.navbar, .navbar ul, .navbar a) liegen in style.css.
*/

/* --- Burger (nur mobil sichtbar) --- */
.navbar .burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}
.navbar .burger span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--text);
  border-radius: 3px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s;
}
.navbar .burger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.navbar .burger.open span:nth-child(2) { opacity: 0; }
.navbar .burger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* --- Gruppen (Container fuer Trigger + Dropdown) --- */
.navbar .nav-item-group {
  position: relative;
}

/* Trigger (Kategorie-Kopf) sieht aus wie ein Navi-Link */
.navbar .nav-group-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  transition: var(--transition);
  background: none;
  border: none;
  font-family: inherit;
  text-align: inherit;
}
button.nav-group-trigger {
  width: 100%;
}
.navbar .nav-group-trigger:hover,
.navbar .nav-item-group.active-group > .nav-group-trigger {
  background: var(--primary-light);
  color: var(--primary);
}

/* Chevron-Indikator bei Gruppen mit Dropdown */
.navbar .nav-group-trigger.has-dropdown::after {
  content: '';
  width: 7px;
  height: 7px;
  margin-left: 2px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  opacity: 0.6;
  transition: transform 0.25s ease;
}

/* --- Dropdown (Desktop): standardmaessig versteckt --- */
.navbar .nav-group-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  min-width: 210px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  transition-delay: 0.18s; /* verzoegertes Schliessen, damit die Luecke ueberbrueckbar ist */
  z-index: 200;
}

/* Unsichtbare "Bruecke", die den margin-top-Spalt ueberdeckt */
.navbar .nav-group-dropdown::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 14px;
  background: transparent;
}

.navbar .nav-group-dropdown li {
  width: 100%;
}
.navbar .nav-group-dropdown a {
  display: block;
  width: 100%;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  font-weight: 500;
  font-size: 0.92rem;
}

/* Oeffnen bei Hover (Desktop) */
.navbar .nav-item-group:hover > .nav-group-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition-delay: 0s; /* sofort oeffnen */
}
.navbar .nav-item-group:hover > .nav-group-trigger.has-dropdown::after {
  transform: rotate(225deg) translateY(2px);
}

/* Verschachtelte Untermenues (Desktop: Flyout rechts) */
.navbar .nav-item-nested > .nav-group-dropdown {
  top: 0;
  left: 100%;
  margin-top: 0;
  margin-left: 6px;
  min-width: 200px;
}
.navbar .nav-item-nested > .nav-group-dropdown::before {
  top: 0;
  left: -8px;
  width: 10px;
  height: 100%;
}
.navbar .nav-item-nested:hover > .nav-group-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition-delay: 0s;
}
.navbar .nav-item-nested .nav-group-trigger {
  font-size: 0.9rem;
  padding: 8px 12px;
}
.navbar .nav-item-nested.active-group > .nav-group-trigger {
  background: var(--primary-light);
  color: var(--primary);
}

/* ============================================================
   Mobile / Tablet: Burger-Menue mit Accordion
   ============================================================ */
@media (max-width: 900px) {
  .navbar {
    display: flex;
    align-items: center;
    position: sticky;
  }
  .navbar .burger {
    display: flex;
    margin-left: auto;
    order: 2;
  }

  .navbar ul#navbar-list {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100dvh;
    width: min(82vw, 340px);
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 2px;
    padding: 84px 18px 24px;
    background: var(--surface);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translate3d(100%, 0, 0);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), visibility 0s linear 0.32s;
    overflow-y: auto;
    z-index: 150;
  }
  .navbar ul#navbar-list.open {
    transform: translate3d(0, 0, 0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), visibility 0s linear 0s;
  }

  .navbar ul#navbar-list > li {
    width: 100%;
    opacity: 0;
    transform: translateX(16px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  .navbar ul#navbar-list.open > li {
    opacity: 1;
    transform: translateX(0);
  }

  .navbar .nav-item-group { position: static; }

  .navbar .nav-group-trigger {
    justify-content: space-between;
    width: 100%;
  }

  /* Dropdown wird im Mobile-Layout zum Accordion */
  .navbar .nav-group-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0 0 0 12px;
    margin: 0;
    min-width: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    transition-delay: 0s;
  }
  /* Bruecke im Accordion deaktivieren */
  .navbar .nav-group-dropdown::before { display: none; }

  /* Hover-Oeffnen auf Touch deaktivieren: nur per .expanded (JS) */
  .navbar .nav-item-group:hover > .nav-group-dropdown { max-height: 0; }
  .navbar .nav-item-group.expanded > .nav-group-dropdown { max-height: 2400px; }

  .navbar .nav-item-nested .nav-group-dropdown {
    padding-left: 8px;
  }
  .navbar .nav-item-nested .nav-group-trigger {
    font-size: 0.95rem;
    padding-left: 8px;
  }

  .navbar .nav-item-group.expanded > .nav-group-trigger.has-dropdown::after {
    transform: rotate(225deg);
  }

  .navbar a, .navbar .nav-group-trigger { font-size: 1rem; }
}