/* ── Nav ──────────────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: linear-gradient(90deg, rgba(var(--c-bg-rgb),0.88), rgba(var(--c-bg2-rgb),0.88));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(var(--c-accent-rgb),0.2);
  transition: background var(--t-normal), box-shadow var(--t-normal);
}

.nav.scrolled {
  background: linear-gradient(90deg, rgba(var(--c-bg-rgb),0.95), rgba(var(--c-bg2-rgb),0.95));
  box-shadow: 0 1px 0 var(--c-border);
}

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  font-family: var(--f-head);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--c-text) 30%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: filter var(--t-normal);
}
.nav__logo:hover {
  filter: brightness(1.3) drop-shadow(0 0 8px var(--c-accent-glow));
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-text-muted);
  position: relative;
  transition: color var(--t-fast);
}
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--c-accent);
  transition: width var(--t-normal);
}
.nav__links a:hover,
.nav__links a.active {
  color: var(--c-text);
}
.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

/* Admin-Links in Nav */
.nav__admin-link {
  color: var(--c-accent) !important;
}
.nav__admin-logout {
  opacity: 0.7;
}
.nav__admin-logout:hover {
  opacity: 1;
  color: #ef4444 !important;
}

/* Sidebar Close-Button — nur auf Mobile sichtbar */
.nav__links-close { display: none; }

/* Burger */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--t-normal);
}
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Backdrop ─────────────────────────────────────────────────────────────── */
.nav__backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  transition: opacity var(--t-normal);
}
.nav__backdrop.open { display: block; }

/* ── Mobile Sidebar ───────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav__burger { display: flex; }

  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    width: 260px;
    height: 100dvh;
    height: 100vh; /* fallback */
    z-index: 99;
    background: rgba(var(--c-bg-rgb), 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--c-border);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: calc(var(--nav-h) + 1.5rem) 1.75rem 2rem;
    gap: 0;
    list-style: none;
    margin: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .nav__links.open {
    transform: translateX(0);
  }
  .nav__links li {
    width: 100%;
    border-bottom: 1px solid rgba(var(--c-border-rgb, 255,255,255), 0.07);
  }
  .nav__links li:last-child {
    border-bottom: none;
  }
  .nav__links a {
    font-size: 1rem;
    display: block;
    padding: .85rem 0;
    width: 100%;
  }

  /* Close-Button oben in der Sidebar — nur auf Mobile einblenden */
  .nav__links-close {
    display: flex;
    border-bottom: 1px solid var(--c-border) !important;
    margin-bottom: .5rem;
    padding-bottom: .5rem;
    display: flex;
    justify-content: flex-end;
  }
  .nav__links-close button {
    background: none;
    border: none;
    color: var(--c-text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: .25rem .5rem;
    line-height: 1;
    transition: color var(--t-fast);
  }
  .nav__links-close button:hover {
    color: var(--c-text);
  }
}