/* ============================================================
   Freyva Landingpage — layout.css
   Header, Navigation, Footer, Responsive-Grundgerüst
   ------------------------------------------------------------
   Der Header ist durchgehend in Nebel-Nacht gehalten: Er liegt
   nahtlos über dem dunklen Hero und wirkt auf hellen Seiten
   (Impressum, Datenschutz) als bewusste Marken-Leiste.
   ============================================================ */

/* ── Header ──────────────────────────────────────────────── */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(11, 46, 51, 0.5);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-header.scrolled {
  background: rgba(11, 46, 51, 0.88);
  border-bottom-color: var(--ink-line);
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 4.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--on-ink);
  margin-right: auto;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  filter: drop-shadow(0 4px 12px rgba(126, 255, 212, 0.22));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.9rem;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--on-ink-soft);
  position: relative;
  padding-block: 0.3rem;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-bright);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s ease;
}

.nav-links a:hover {
  color: var(--on-ink);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 0.55rem 1.25rem;
  font-size: 0.92rem;
}

.only-mobile {
  display: none;
}

/* ── Hamburger ───────────────────────────────────────────── */

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  place-items: center;
  position: relative;
  z-index: 120;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--on-ink);
  position: relative;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle span::before { position: absolute; top: -7px; }
.nav-toggle span::after  { position: absolute; top:  7px; }

.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span::after  { transform: translateY(-7px) rotate(-45deg); }

/* ── Footer ──────────────────────────────────────────────── */

.site-footer {
  background: var(--ink);
  color: var(--on-ink-soft);
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
  border-top: 1px solid var(--ink-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.site-footer .brand {
  color: var(--on-ink);
}

.site-footer h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-bright);
  margin-bottom: 0.9rem;
}

.site-footer ul {
  display: grid;
  gap: 0.55rem;
  font-size: 0.95rem;
}

.site-footer a {
  color: var(--on-ink-soft);
  transition: color 0.2s ease;
}

.site-footer a:hover {
  color: var(--accent-bright);
}

.footer-note {
  border-top: 1px solid var(--ink-line);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  font-size: 0.85rem;
  color: rgba(238, 245, 241, 0.5);
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 980px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    inset: 0;
    z-index: 110;
    flex-direction: column;
    justify-content: center;
    gap: 1.9rem;
    background: rgba(11, 46, 51, 0.97);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .nav-links a {
    font-family: var(--font-display);
    font-size: 1.7rem;
    color: var(--on-ink);
  }

  .nav-open .nav-links {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-open {
    overflow: hidden;
  }

  .nav-toggle {
    display: grid;
  }

  .nav-cta {
    display: none;
  }

  .nav-links .only-mobile {
    display: block;
  }

  .nav-links .only-mobile a {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    background: var(--accent-bright);
    color: var(--ink);
    padding: 0.8rem 1.7rem;
    border-radius: 999px;
    margin-top: 0.4rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}