/* ---------- Kopfzeile ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  max-width: 100vw;
  transition: background-color var(--duration-normal), border-color var(--duration-normal), backdrop-filter var(--duration-normal);
  border-bottom: 1px solid transparent;
}
.nav.is-solid, .nav.is-open {
  background: rgb(11 9 7 / 0.82);
  border-color: var(--line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: var(--maxw);
  min-height: 4.25rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}
.brand__mark { width: 2.4rem; height: 2.4rem; flex: none; }
.brand__mark rect { fill: none; stroke: var(--gold); stroke-width: 2; }
.brand__mark text { font-family: var(--font-display); font-size: 24px; fill: var(--paper); }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.brand__name span { color: var(--gold); font-style: italic; text-transform: none; }

.nav__links { display: flex; align-items: center; gap: 2rem; }
.nav__links ol { display: flex; gap: 1.75rem; }
.nav__links ol a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding-block: 0.4rem;
  font-size: var(--text-sm);
  text-decoration: none;
  color: var(--sand-300);
  transition: color var(--duration-fast);
}
.nav__links ol a span { font-family: var(--font-mono); font-size: 0.625rem; color: var(--gold); }
.nav__links ol a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}
.nav__links ol a:hover { color: var(--paper); }
.nav__links ol a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav__cta { min-height: 2.75rem; padding-block: 0.6rem; }

.nav__toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}
.nav__burger, .nav__burger::before {
  display: block;
  width: 1.1rem;
  height: 1.5px;
  margin-inline: auto;
  background: currentColor;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}
.nav__burger { position: relative; transform: translateY(-3px); }
.nav__burger::before { content: ""; position: absolute; left: 0; top: 6px; }
.nav__toggle[aria-expanded="true"] .nav__burger { transform: translateY(0) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__burger::before { transform: translateY(-6px) rotate(-90deg); }

@media (max-width: 63.99rem) {
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed;
    inset: 4.25rem 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    padding: 1.5rem var(--gutter) 2rem;
    background: rgb(11 9 7 / 0.96);
    border-bottom: 1px solid var(--line);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-0.75rem);
    transition: opacity var(--duration-normal), transform var(--duration-normal) var(--ease-out-expo), visibility var(--duration-normal);
  }
  .nav__links.is-open { visibility: visible; opacity: 1; transform: none; }
  .nav__links ol { flex-direction: column; gap: 0; }
  .nav__links ol a {
    width: 100%;
    gap: 1rem;
    padding-block: 0.9rem;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--paper);
  }
  .nav__cta { justify-content: center; }
}
@media (max-width: 22.5rem) {
  .brand__name { font-size: 1.2rem; }
}