/* ============================================================
   Navigation — Sticky header, burger menu, drawer, accordion.
   ============================================================ */

/* --- Base Nav & Containers --- */
.nav {
  position: sticky;
  top: 0;
  padding-top: env(safe-area-inset-top);
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  transition: background-color var(--dur-slow) var(--ease-out),
    backdrop-filter var(--dur-slow) var(--ease-out);
}

.nav__inner {
  position: relative;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: var(--sp-4);
}

.nav__brand {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  text-decoration: none;
}

/* --- Desktop Layout --- */
.nav__menu {
  display: flex;
  flex: 1;
  align-items: center;
}

.nav__menu-scroller {
  display: flex;
  flex: 1;
  align-items: center;
}

/* 1. Invisible left balancer to push links center */
.nav__menu-scroller::before {
  content: "";
  flex: 1;
}

/* 2. Actions container acts as right balancer */
.nav__actions {
  display: flex;
  flex: 1;
  /* Takes up equal space as the left balancer */
  align-items: center;
  justify-content: flex-end;
  /* Pushes DE/EN/FR flush right */
  gap: var(--sp-4);
}

.nav__inner-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

/* --- Main Navigation Links --- */
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(var(--sp-4), 2vw, var(--sp-6));
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__list li {
  margin: 0;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 14px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  line-height: 1;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.nav__link:hover {
  background: color-mix(in srgb, var(--color-text) 10%, transparent);
  color: var(--color-text);
}

.nav__link[aria-current="page"] {
  background: var(--color-text);
  color: var(--color-bg);
}

.nav__link svg {
  display: none;
}

/* --- Desktop Submenu --- */
.nav__submenu {
  display: none !important; /* Disabled on desktop as per user request */
}

@media (max-width: 980px) {
  .nav__link svg {
    display: block;
  }

  .nav__submenu {
    position: static;
    display: block !important;
    min-width: 0;
    max-height: 0;
    margin-top: 0;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur-med) var(--ease-out),
      opacity var(--dur-med) var(--ease-out),
      padding var(--dur-med) var(--ease-out);
  }

  .nav__submenu.is-open {
    max-height: 500px;
    padding-block: var(--sp-3);
    padding-left: var(--sp-5);
    opacity: 1;
  }
}

.nav__submenu-link {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  text-decoration: none;
}

.nav__submenu-link:hover {
  background: var(--color-surface-muted);
}

/* --- Mobile Toggle (Hamburger to X) --- */
.nav__toggle {
  position: relative;
  z-index: 100;
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  cursor: pointer;
  transform: rotate(0deg);
  transition: transform var(--dur-slow) cubic-bezier(0.34, 1.56, 0.64, 1),
    border-color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
}

.nav__toggle-bar {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform var(--dur-slow) cubic-bezier(0.68, -0.6, 0.32, 1.6),
    opacity var(--dur-fast) var(--ease-out);
}

.nav__toggle-bar:nth-child(1) {
  transform: translate(-50%, -6px);
}

.nav__toggle-bar:nth-child(3) {
  transform: translate(-50%, 4px);
}

/* Toggle Cinematic Overtake Animation */
.nav.is-open .nav__toggle {
  border-color: var(--color-text);
  transform: rotate(180deg);
}

.nav.is-open .nav__toggle-bar:nth-child(1) {
  transform: translate(-50%, -50%) rotate(225deg);
}

.nav.is-open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav.is-open .nav__toggle-bar:nth-child(3) {
  transform: translate(-50%, -50%) rotate(-45deg);
}

/* ============================================================
   Mobile / Tablet Drawer
   ============================================================ */
@media (max-width: 980px) {
  .nav__inner {
    position: static;
  }

  .nav__toggle {
    display: inline-flex;
  }

  /* Hide the desktop balancer trick on mobile */
  .nav__menu-scroller::before {
    display: none;
  }

  /* Drawer Container */
  .nav__menu {
    position: absolute;
    top: calc(100% - 1px);
    left: 0;
    right: 0;
    z-index: -1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-6);
    padding-inline: var(--gutter);
    background: color-mix(in srgb, var(--color-bg) 92%, transparent);
    backdrop-filter: saturate(1.4) blur(8px);
    -webkit-backdrop-filter: saturate(1.4) blur(8px);
    border-top: none;
    box-shadow: none;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transform: translateY(0);
    transition: visibility 0s linear var(--dur-slow);
  }

  /* Drawer Open State */
  .nav.is-open {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav.is-open .nav__menu {
    top: 0;
    z-index: 1;
    height: 100vh;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    animation: drawerSlideDown var(--dur-slow) var(--ease-out) forwards;
    transition: opacity var(--dur-slow) var(--ease-out),
      backdrop-filter var(--dur-slow) var(--ease-out),
      visibility 0s linear 0s;
  }

  .nav__menu-scroller {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    height: 100vh;
    padding-top: 80px;
    padding-bottom: var(--sp-8);
    gap: var(--sp-6);
    overflow-y: auto;
  }

  /* Drawer Main Links */
  .nav.is-open .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-2);
    margin: 0;
  }

  .nav__list>li {
    width: 100%;
    opacity: 0;
    transform: translateY(15px);
    transition: none;
  }

  .nav.is-open .nav__list>li {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
  }

  .nav__link {
    width: 100%;
    justify-content: space-between;
    padding: 12px 20px;
  }

  /* Mobile Accordion Submenu */
  .nav__submenu {
    position: static;
    display: block;
    min-width: 0;
    max-height: 0;
    margin-top: 0;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur-med) var(--ease-out),
      opacity var(--dur-med) var(--ease-out),
      padding var(--dur-med) var(--ease-out);
  }

  .nav__submenu.is-open {
    max-height: 500px;
    padding-block: var(--sp-3);
    padding-left: var(--sp-5);
    opacity: 1;
  }

  .nav__submenu-link {
    width: 100%;
    padding: 8px 20px;
    border-radius: var(--radius-pill);
    opacity: 0;
    transition: opacity var(--dur-med) var(--ease-in-out);
  }

  .nav__submenu-link:hover {
    background: color-mix(in srgb, var(--color-text) 10%, transparent);
    color: var(--color-text);
  }

  .nav__submenu.is-open .nav__submenu-link {
    opacity: 1;
    transition: opacity var(--dur-med) var(--ease-out);
  }

  /* Mobile Bottom Actions */
  .nav__actions {
    flex: none;
    /* Reset the balancer trick for mobile */
    flex-direction: column-reverse;
    align-items: center;
    gap: var(--sp-5);
    padding-top: var(--sp-4);
    border-top: 1px solid var(--color-border);
  }

  /* Language Switcher Intro Animation */
  .lang-switcher__btn {
    opacity: 0;
    transform: translateX(-10px);
    transition: none;
  }

  .nav.is-open .lang-switcher__btn {
    opacity: 1;
    transform: translateX(0);
    transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
  }

  /* --- Staggered Animation Delays --- */

  /* 1. Main Links */
  .nav.is-open .nav__list>li:nth-child(1) {
    transition-delay: 240ms;
  }

  .nav.is-open .nav__list>li:nth-child(2) {
    transition-delay: 290ms;
  }

  .nav.is-open .nav__list>li:nth-child(3) {
    transition-delay: 340ms;
  }

  .nav.is-open .nav__list>li:nth-child(4) {
    transition-delay: 390ms;
  }

  /* 2. Submenu Links */
  .nav__submenu.is-open .nav__submenu-link:nth-child(1) {
    transition-delay: 100ms;
  }

  .nav__submenu.is-open .nav__submenu-link:nth-child(2) {
    transition-delay: 150ms;
  }

  .nav__submenu.is-open .nav__submenu-link:nth-child(3) {
    transition-delay: 200ms;
  }

  .nav__submenu.is-open .nav__submenu-link:nth-child(4) {
    transition-delay: 250ms;
  }

  .nav__submenu.is-open .nav__submenu-link:nth-child(5) {
    transition-delay: 300ms;
  }

  .nav__submenu.is-open .nav__submenu-link:nth-child(6) {
    transition-delay: 350ms;
  }

  /* 3. Lang Switchers */
  .nav.is-open .lang-switcher__btn:nth-child(1) {
    transition-delay: 440ms;
  }

  .nav.is-open .lang-switcher__btn:nth-child(2) {
    transition-delay: 490ms;
  }

  .nav.is-open .lang-switcher__btn:nth-child(3) {
    transition-delay: 540ms;
  }
}

@keyframes drawerSlideDown {
  from {
    transform: translateY(-100%);
  }

  to {
    transform: translateY(0);
  }
}