/* nav.css — Layer: components (rote Kopfleiste + Menü).
 * Markup: snippets/header.php, Verhalten: assets/js/nav.js.
 * Eigene Datei wegen Umfang (Desktop-Dropdowns + mobile Drawer). */
@layer components {

/* ——— Nav (red bar) — Markup: snippets/header.php, Verhalten: assets/js/nav.js ———
 * Desktop: horizontal top-level, hover dropdowns.
 * Mobile:  hamburger toggle, drawer opens below the bar.
 */
.frgs-nav {
  background: var(--frgs-red);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 20;
}
.frgs-nav-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--sp-3) var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
@media (min-width: 768px) {
  .frgs-nav-inner { padding: var(--sp-3) var(--sp-8); gap: var(--sp-8); }
}
.frgs-nav-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  flex-shrink: 0;
  padding: 2px;
  line-height: 0;
}
.frgs-nav-logo img {
  display: block;
  width: auto;
  height: 40px;
}

/* Hamburger button — visible only on narrow viewports */
.frgs-nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: var(--sp-2);
  margin-left: auto;
  cursor: pointer;
  color: var(--white);
}
.frgs-nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  margin: 5px 0;
  transition: transform 180ms ease, opacity 180ms ease;
}
.frgs-nav.is-open .frgs-nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.frgs-nav.is-open .frgs-nav-toggle-bar:nth-child(2) { opacity: 0; }
.frgs-nav.is-open .frgs-nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Top-level menu items */
.frgs-nav-items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--sp-6);
  font-size: var(--fs-sm);
  font-weight: 500;
  align-items: center;
  flex-wrap: wrap;
}
.frgs-nav-items > li { position: relative; }
.frgs-nav-items a {
  color: var(--white);
  opacity: 0.85;
  text-decoration: none;
  padding: var(--sp-2) 0;
  display: block;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.frgs-nav-items a:hover { opacity: 1; color: var(--white); }
.frgs-nav-items > li.current > a,
.frgs-nav-items > li.active > a {
  opacity: 1;
  border-bottom-color: var(--white);
}

/* "has children" toggle button */
.frgs-nav-sub-toggle {
  background: transparent;
  border: 0;
  padding: var(--sp-2) 0;
  color: var(--white);
  opacity: 0.85;
  font-weight: 500;
  font-size: var(--fs-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.frgs-nav-sub-toggle:hover { opacity: 1; }
.frgs-nav-sub-toggle .icon { transition: transform 180ms ease; }
.frgs-nav-sub-toggle[aria-expanded="true"] .icon { transform: rotate(180deg); }
.frgs-nav-items > li.current > .frgs-nav-sub-toggle {
  opacity: 1;
  border-bottom-color: var(--white);
}

/* Submenu (desktop dropdown) — white panel in the spirit of the
 * old mega-menu: hairline rows, section head, red hover accent */
.frgs-nav-sub {
  list-style: none;
  margin: 0;
  /* padding explizit 0, nicht --sp-3: im ungelayerten Ist-Zustand gewann
   * immer reset.css' ul[class]-Regel (höhere Spezifität) gegen diese Klasse,
   * --sp-3 war hier also schon vor der Layer-Aufteilung totes CSS. Mit
   * @layer wird die Regel wirksam — daher explizit auf den Wert gesetzt,
   * der tatsächlich gerendert wurde. */
  padding: 0;
  position: absolute;
  top: calc(100% + var(--sp-2));
  left: 0;
  min-width: 300px;
  max-width: 380px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 48px rgba(20,20,20,0.16), 0 2px 8px rgba(20,20,20,0.08);
  border-radius: var(--radius-lg);
  display: none;
  z-index: 30;
}
.frgs-nav-items > li > .frgs-nav-sub-toggle[aria-expanded="true"] + .frgs-nav-sub {
  display: block;
  animation: frgs-menu-in 160ms ease-out;
}
@keyframes frgs-menu-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .frgs-nav-items > li > .frgs-nav-sub-toggle[aria-expanded="true"] + .frgs-nav-sub {
    animation: none;
  }
}
.frgs-nav-sub li { display: block; }
.frgs-nav-sub li:not(.frgs-nav-sub-head) { border-top: 1px solid var(--ink-100); }
.frgs-nav-sub a {
  position: relative;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--ink-900);
  opacity: 1;
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 0;
  border-radius: var(--radius-sm);
  white-space: normal; /* .frgs-nav-items a setzt nowrap — lange Titel müssen im Panel umbrechen */
}
.frgs-nav-sub a::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  border-radius: 2px;
  background: var(--frgs-red);
  transition: height 140ms ease;
}
.frgs-nav-sub a:hover {
  background: var(--frgs-red-soft);
  color: var(--frgs-red-dark);
  opacity: 1;
}
.frgs-nav-sub a:hover::before,
.frgs-nav-sub a[aria-current="page"]::before { height: 55%; }
.frgs-nav-sub a[aria-current="page"] { color: var(--frgs-red-dark); }
.frgs-nav-sub a:focus-visible {
  outline: 2px solid var(--frgs-red);
  outline-offset: -2px;
}

/* Kopfzeile — Link zur Übersichtsseite der Rubrik */
.frgs-nav-sub-head { margin-bottom: var(--sp-1); }
.frgs-nav-sub-head a {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-500);
}
.frgs-nav-sub-head a::after { content: " →"; }

/* Lange Rubriken: zwei Spalten */
.frgs-nav-sub--wide {
  min-width: 560px;
  max-width: 640px;
}
.frgs-nav-items > li > .frgs-nav-sub-toggle[aria-expanded="true"] + .frgs-nav-sub--wide {
  columns: 2;
  column-gap: var(--sp-6);
}
.frgs-nav-sub--wide li { break-inside: avoid; }
.frgs-nav-sub--wide .frgs-nav-sub-head { column-span: all; }
/* Nested deeper submenus (rare): render as flyout to the right */
.frgs-nav-sub .frgs-nav-sub {
  top: 0;
  left: 100%;
  border-radius: var(--radius-md);
}

/* Mobile: hamburger + drawer */
@media (max-width: 767px) {
  .frgs-nav-toggle { display: block; }

  .frgs-nav-items {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--frgs-red);
    flex-direction: column;
    align-items: stretch;
    padding: var(--sp-2) var(--sp-4);
    gap: 0;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  .frgs-nav.is-open .frgs-nav-items { display: flex; }

  .frgs-nav-items > li {
    width: 100%;
    border-bottom: 1px solid rgba(255,255,255,0.12);
  }
  .frgs-nav-items > li:last-child { border-bottom: 0; }

  .frgs-nav-items a { padding: var(--sp-3) 0; }
  .frgs-nav-items > li.current > a,
  .frgs-nav-items > li.active > a { border-bottom-color: transparent; }

  .frgs-nav-sub {
    position: static;
    display: none;
    background: rgba(0,0,0,0.15);
    border: 0;
    box-shadow: none;
    border-radius: var(--radius-sm);
    /* padding explizit 0, nicht --sp-2 --sp-4: gleicher Fall wie beim
     * Desktop-Rule oben — reset.css' ul[class]-Regel gewann ungelayert auf
     * Spezifität, --sp-2/--sp-4 war hier totes CSS. Wert an den tatsächlich
     * gerenderten Zustand angeglichen. */
    padding: 0;
    margin-bottom: var(--sp-2);
    min-width: 0;
    max-width: none;
  }
  .frgs-nav-items > li > .frgs-nav-sub-toggle[aria-expanded="true"] + .frgs-nav-sub--wide {
    display: block;
    columns: auto;
  }
  .frgs-nav-sub li:not(.frgs-nav-sub-head) { border-top: 1px solid rgba(255,255,255,0.12); }
  .frgs-nav-sub a {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--white);
    padding: var(--sp-3) 0;
    border-radius: 0;
  }
  .frgs-nav-sub a::before { display: none; }
  .frgs-nav-sub a:hover {
    background: transparent;
    color: var(--white);
  }
  .frgs-nav-sub a[aria-current="page"] {
    color: var(--white);
    text-decoration: underline;
    text-underline-offset: 4px;
  }
  .frgs-nav-sub-head a { color: rgba(255,255,255,0.7); }
  .frgs-nav-sub-toggle { width: 100%; padding: var(--sp-3) 0; }

  .frgs-nav-sub .frgs-nav-sub {
    top: auto;
    left: auto;
  }
}

} /* Ende @layer components */