.footer {
  width: 100%;
  box-sizing: border-box;
  background-color: var(--header-color);
  color: white;
  padding: clamp(3rem, 6vh, 5rem) 0 clamp(1.5rem, 3vh, 2rem);
  margin-top: clamp(4rem, 8vh, 6rem);
  margin-left: 0;
  margin-right: 0;
  position: relative;
  /* main-contentより手前 */
  z-index: 1;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2%;
  width: 90%;
  box-sizing: border-box;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  margin-bottom: clamp(2rem, 4vh, 3rem);
  margin-left: auto;
  margin-right: auto;
  max-width: 1200px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: clamp(1rem, 2vh, 1.5rem);
}

.footer-logo-image {
  height: clamp(1.5rem, 3vh, 2rem);
  width: auto;
}

.company-info h3 {
  margin: 0;
  font-size: clamp(1.125rem, 2.2vw, 1.5rem);
  color: var(--color-main);
}

.company-info p {
  margin: 0;
  line-height: 1.6;
  color: var(--color-main);
  font-size: clamp(0.8rem, 1.2vw, 0.875rem);
}

.footer-nav h4 {
  margin: 0 0 clamp(1rem, 2vh, 1.25rem) 0;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-main);
}

.footer-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav-list li {
  margin-bottom: 0.5rem;
}

.footer-nav-list a {
  color: var(--color-main);
  text-decoration: none;
  font-size: clamp(0.8rem, 1.2vw, 0.875rem);
  transition: color 0.3s ease;
}

.footer-nav-list a:hover {
  color: var(--color-main);
}

.contact-form h4 {
  margin: 0 0 clamp(1rem, 2vh, 1.25rem) 0;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-main);
}

.contact-form p {
  margin: 0 0 1rem 0;
  line-height: 1.6;
  color: var(--color-main);
  font-size: clamp(0.8rem, 1.2vw, 0.875rem);
}

.contact-form-btn {
  display: inline-block;
  padding: clamp(0.6rem, 1.5vh, 0.75rem) clamp(1.25rem, 2.5vw, 1.5rem);
  background: linear-gradient(135deg, var(--color-main) 0%, var(--color-main) 100%);
  color: white;
  text-decoration: none;
  border-radius: 1.5rem;
  font-size: clamp(0.8rem, 1.2vw, 0.875rem);
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(132, 149, 243, 0.3);
}

.contact-form-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(250, 250, 250, 0.4);
}

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: clamp(1rem, 2vh, 1.25rem);
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  color: var(--color-main);
  font-size: clamp(0.8rem, 1.2vw, 0.875rem);
}

@media (max-width: 768px) {
  .footer {
    padding: clamp(2rem, 5vh, 3rem) 0 clamp(1rem, 2vh, 1.5rem);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: clamp(1.5rem, 4vw, 2rem);
    text-align: center;
  }

  .company-info h3,
  .footer-nav h4,
  .contact-form h4 {
    font-size: clamp(1rem, 4vw, 1.25rem);
  }

  .contact-form-btn {
    font-size: clamp(0.75rem, 2.5vw, 0.8rem);
    padding: 0.6rem 1.25rem;
  }
}