.footer {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer__content {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.footer__main {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer__tagline {
  font-size: 0.875rem;
  color: #bdc3c7;
  line-height: 1.6;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer__column {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer__heading {
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.footer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer__link {
  color: #bdc3c7;
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.footer__link:hover {
  color: #ffffff;
}

.footer__company {
  color: #bdc3c7;
  font-size: 0.875rem;
  font-weight: 500;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
  font-size: 0.875rem;
  color: #bdc3c7;
}

.footer__social {
  display: flex;
  gap: 1rem;
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #bdc3c7;
  transition: all 0.2s ease;
}

.footer__social-link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  transform: translateY(-2px);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .footer__main {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer__links {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .footer__bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .footer__social {
    justify-content: center;
  }
}