/* Mobile Navigation „Leitwarte" — nur <860px sichtbar */
.mnav-btn {
  display: none;
  align-items: center;
  gap: 0.6rem;
  background: none;
  border: 1px solid rgba(231, 238, 255, 0.24);
  border-radius: 2px;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
}
.mnav-btn__ico {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 18px;
}
.mnav-btn__ico i {
  display: block;
  height: 2px;
  background: var(--signal);
  transition:
    transform 0.24s var(--ease-snap),
    opacity 0.2s;
}
.mnav-btn[aria-expanded="true"] .mnav-btn__ico i:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.mnav-btn[aria-expanded="true"] .mnav-btn__ico i:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.mnav {
  position: fixed;
  inset: 0;
  z-index: 55; /* unter .nav (60) — Burger bleibt als Schließer sichtbar */
  background: var(--cobalt-950);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem clamp(1.2rem, 6vw, 3rem) 2.5rem;
  opacity: 0;
  transform: translateY(-6%);
  visibility: hidden;
  transition:
    opacity 0.3s var(--ease-snap),
    transform 0.36s var(--ease-snap),
    visibility 0s linear 0.36s;
}
.mnav.open {
  opacity: 1;
  transform: none;
  visibility: visible;
  transition:
    opacity 0.3s var(--ease-snap),
    transform 0.36s var(--ease-snap);
}
.mnav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.mnav__list li {
  border-bottom: 1px solid rgba(231, 238, 255, 0.08);
  position: relative;
}
.mnav__list li::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 2.2rem;
  height: 1px;
  background: var(--tint-line, rgba(231, 238, 255, 0.24));
}
.mnav--waerme {
  --tint-line: var(--waerme);
}
.mnav--wasser {
  --tint-line: var(--wasser);
}
.mnav--luft {
  --tint-line: var(--luft);
}
.mnav__list a {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 0;
  text-decoration: none;
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 125%;
  font-size: clamp(1.7rem, 7.5vw, 2.4rem);
  line-height: 1;
}
.mnav__list a span {
  font-family: var(--font-mono);
  font-weight: 400;
  font-stretch: 100%;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--mute);
}
.mnav__list a[aria-current="page"] span {
  color: var(--signal);
}
.mnav__foot {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  align-items: center;
}
.mnav__tel {
  color: var(--paper);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.06em;
  border: 1px solid rgba(231, 238, 255, 0.24);
  border-radius: 2px;
  padding: 0.8rem 1.1rem;
}
.mnav__cta {
  background: var(--signal);
  color: var(--abyss);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: 2px;
  padding: 0.85rem 1.2rem;
}
html.mnav-lock,
html.mnav-lock body {
  overflow: hidden;
}
@media (max-width: 860px) {
  .mnav-btn {
    display: inline-flex;
  }
}
/* <560px: CTA aus dem Balken nehmen — Wortmarke braucht den Platz;
   der CTA lebt im Hero + im offenen Menü weiter */
@media (max-width: 560px) {
  .nav .nav-cta {
    display: none;
  }
}
@media (min-width: 861px) {
  .mnav {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .mnav,
  .mnav.open,
  .mnav-btn__ico i {
    transition: none;
  }
}