/* ============================================================
   Footer — Konzern-Stil. Brand + 4-Spalten-Sitemap, Cert-Reihe,
   Bottom-Bar. Mono-Headings mit Akzent-Linie wie section__eyebrow.
   ============================================================ */

.site-footer {
  background: var(--color-text-strong);
  color: rgba(243, 245, 248, 0.7);
  padding-top: clamp(4.5rem, 7vw, 6.5rem);
  padding-bottom: var(--space-md);
  position: relative;
}

/* Subtiler Akzent-Strich oben mittig (Brand-Touch) */
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 2px;
  background: var(--color-green-glow);
}

/* ---------- TOP: Brand + Sitemap-Spalten ---------- */

.site-footer__top {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  display: grid;
  grid-template-columns: 1.4fr 3fr;
  gap: clamp(2rem, 4vw, 4rem);
  padding-bottom: clamp(2.5rem, 4vw, 4rem);
  border-bottom: 1px solid rgba(243, 245, 248, 0.08);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.site-footer__logo {
  width: auto;
  height: 48px;
  align-self: flex-start;
}

.site-footer__claim {
  font-family: 'Geist', sans-serif;
  font-size: 1.0625rem;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--color-bg-light);
  max-width: 26ch;
}

.site-footer__address {
  font-family: 'Geist', sans-serif;
  font-style: normal;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(243, 245, 248, 0.7);
  margin-top: var(--space-xs);
}

.site-footer__address strong {
  color: var(--color-bg-light);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.site-footer__cta {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: var(--space-sm);
  padding: 0.85rem 1.4rem;
  background: rgba(243, 245, 248, 0.08);
  color: var(--color-bg-light);
  border: 1px solid rgba(243, 245, 248, 0.18);
  font-family: 'Geist', sans-serif;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 2px;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.site-footer__cta:hover {
  background: var(--color-green);
  border-color: var(--color-green);
  transform: translateY(-1px);
}

.site-footer__cta span {
  transition: transform 0.3s ease;
}

.site-footer__cta:hover span {
  transform: translateX(3px);
}

/* ---------- Sitemap-Spalten ---------- */

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.site-footer__col {
  display: flex;
  flex-direction: column;
}

.site-footer__heading {
  font-family: 'Geist Mono', monospace;
  font-size: var(--fs-mono-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-green-glow);
  margin-bottom: var(--space-md);
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.site-footer__heading::before {
  content: '';
  width: 24px;
  height: 1px;
  background: currentColor;
}

.site-footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.site-footer__list li {
  font-family: 'Geist', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.site-footer__list a {
  color: rgba(243, 245, 248, 0.78);
  position: relative;
  display: inline-block;
  transition: color 0.25s ease;
}

.site-footer__list a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--color-green-glow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.site-footer__list a:hover {
  color: var(--color-bg-light);
}

.site-footer__list a:hover::after {
  transform: scaleX(1);
}

/* ---------- Zertifizierungs-Reihe ---------- */

.site-footer__certs {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 4vw, 4rem) var(--container-pad);
  border-bottom: 1px solid rgba(243, 245, 248, 0.08);
}

.site-footer__cert-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-sm);
}

.site-footer__cert {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: var(--space-md) var(--space-sm);
  background: rgba(243, 245, 248, 0.03);
  border: 1px solid rgba(243, 245, 248, 0.08);
  text-align: left;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-footer__cert:hover {
  background: rgba(243, 245, 248, 0.06);
  border-color: rgba(28, 138, 62, 0.4);
}

.site-footer__cert-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--color-green-glow);
  margin-bottom: 0.3rem;
}

.site-footer__cert-icon svg {
  width: 28px;
  height: 28px;
}

.site-footer__cert-eyebrow {
  font-family: 'Geist Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(243, 245, 248, 0.5);
}

.site-footer__cert-name {
  font-family: 'Geist', sans-serif;
  font-weight: 500;
  font-size: 1.0625rem;
  letter-spacing: -0.005em;
  color: var(--color-bg-light);
  line-height: 1.2;
}

.site-footer__cert-sub {
  font-family: 'Geist', sans-serif;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: rgba(243, 245, 248, 0.55);
}

.site-footer__cert-note {
  margin-top: var(--space-md);
  font-family: 'Geist Mono', monospace;
  font-size: var(--fs-mono-xs);
  letter-spacing: 0.04em;
  color: rgba(243, 245, 248, 0.4);
  padding-left: 1.75rem;
  position: relative;
  max-width: 60ch;
}

.site-footer__cert-note::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 16px;
  height: 1px;
  background: rgba(243, 245, 248, 0.4);
}

/* ---------- Bottom-Bar ---------- */

.site-footer__bottom {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-lg) var(--container-pad) var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Geist Mono', monospace;
  font-size: var(--fs-mono-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(243, 245, 248, 0.45);
  gap: var(--space-md);
}

.site-footer__copy { letter-spacing: 0.08em; }

.site-footer__credit {
  letter-spacing: 0.12em;
}

.site-footer__credit a {
  color: rgba(243, 245, 248, 0.7);
  border-bottom: 1px solid rgba(243, 245, 248, 0.2);
  transition: color 0.25s ease, border-color 0.25s ease;
}

.site-footer__credit a:hover {
  color: var(--color-bg-light);
  border-color: var(--color-green-glow);
}

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .site-footer__cert-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 880px) {
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .site-footer__cols {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md) var(--space-lg);
  }
  .site-footer__cta {
    justify-content: center;
    width: 100%;
    text-align: center;
    padding: 0.95rem 1.4rem;
  }
  .site-footer__cta:hover {
    transform: none;
  }
  .site-footer__cert:hover {
    background: rgba(243, 245, 248, 0.03);
    border-color: rgba(243, 245, 248, 0.08);
  }
}

@media (max-width: 540px) {
  .site-footer {
    padding-top: clamp(3rem, 8vw, 4.5rem);
  }
  .site-footer__cols {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .site-footer__cert-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
  }
  .site-footer__cert {
    padding: var(--space-sm) 0.8rem;
  }
  .site-footer__cert-name {
    font-size: 0.95rem;
  }
  .site-footer__bottom {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
    padding-top: var(--space-md);
  }
}