/* ===========================================
   Footer
   =========================================== */

.site-footer {
  background-color: var(--color-text);
  color: rgba(255, 255, 255, 0.85);
  padding-top: var(--space-6);
  padding-bottom: calc(var(--space-3) + var(--safe-bottom));
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
  position: relative;
  overflow-x: clip;
}

@media (min-width: 768px) {
  .site-footer {
    padding-top: var(--space-8);
    padding-bottom: calc(var(--space-4) + var(--safe-bottom));
  }
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--color-accent-sky) 50%,
    transparent 100%);
  opacity: 0.5;
}

.site-footer * {
  color: inherit;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

@media (min-width: 480px) {
  .site-footer__grid {
    gap: var(--space-4);
  }
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
  }
}

.site-footer__brand {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .site-footer__brand {
    grid-column: span 1;
  }
}

.site-footer__logo {
  display: inline-block;
  margin-bottom: var(--space-3);
  transition: opacity var(--duration-fast) var(--ease-out);
}

.site-footer__logo:hover {
  opacity: 0.85;
}

.site-footer__logo-img {
  width: 200px;
  max-width: 100%;
  height: auto;
  display: block;
  /* フッター背景は濃紺なので、ロゴを白系で見せるためフィルタ */
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

@media (min-width: 768px) {
  .site-footer__logo-img {
    width: 240px;
  }
}

.site-footer__tagline {
  font-size: var(--fs-small);
  line-height: var(--lh-relaxed);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-2);
  max-width: 320px;
}

.site-footer__address {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.6);
  font-style: normal;
  line-height: var(--lh-relaxed);
}

.site-footer__contact-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: var(--fw-medium);
  transition: color var(--duration-fast) var(--ease-out);
  display: inline-block;
  padding-block: 2px;
}

.site-footer__contact-link:hover {
  color: var(--color-accent-sky);
}

/* ---------- ソーシャルリンク (Instagram) ---------- */
.site-footer__social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.site-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  transition:
    transform var(--duration-base) var(--ease-out),
    filter var(--duration-base) var(--ease-out);
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
}

.site-footer__social-link svg {
  width: 100%;
  height: 100%;
  display: block;
}

.site-footer__social-link:hover {
  transform: translateY(-3px) scale(1.05);
  filter: drop-shadow(0 8px 20px rgba(225, 48, 108, 0.45));
}

.site-footer__social-link:active {
  transform: translateY(-1px) scale(1.02);
}

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-base);
  margin-bottom: var(--space-2);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-footer__link {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--duration-fast) var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding-block: 6px;
  min-height: var(--tap-min);
}

@media (min-width: 768px) {
  .site-footer__link {
    font-size: var(--fs-small);
    padding-block: 0;
    min-height: 0;
  }
}

.site-footer__link:hover {
  color: var(--color-accent-sky);
}

.site-footer__link::before {
  content: '→';
  opacity: 0;
  transition: opacity var(--duration-fast), transform var(--duration-fast);
  transform: translateX(-4px);
}

.site-footer__link:hover::before {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- Bottom Bar ---------- */
.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.site-footer__copyright {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
}

.site-footer__legal a {
  padding: 6px 0;
  min-height: var(--tap-min);
  display: inline-flex;
  align-items: center;
}

@media (min-width: 768px) {
  .site-footer__legal {
    gap: var(--space-3);
    flex-wrap: nowrap;
    justify-content: flex-end;
  }

  .site-footer__legal a {
    padding: 0;
    min-height: 0;
  }
}

.site-footer__legal a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-footer__legal a:hover {
  color: var(--color-accent-sky);
}