/* ==========================================================================
   Homestay Korea — Footer
   회사 정보, 퀵 링크, 소셜 미디어, 연락처, Top 버튼
   ========================================================================== */

/* ---- 메인 푸터 — 다크 테마 ---- */
.footer {
  background: var(--color-bg-dark);
  border-top: none;
  padding-top: var(--spacing-10);
  padding-bottom: 0;
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.65);
}

.footer a {
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--color-primary);
}

/* ---- 푸터 상단: 4열 그리드 ---- */
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--spacing-8);
  padding-bottom: var(--spacing-6);
}

/* 푸터 컬럼 */
.footer__col {
  display: flex;
  flex-direction: column;
}

/* 로고 + 설명 (첫 번째 컬럼) */
.footer__logo {
  margin-bottom: var(--spacing-4);
}

.footer__logo img {
  height: 36px;
  width: auto;
}

.footer__description {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--spacing-5);
  max-width: 280px;
}

/* 소셜 아이콘 */
.footer__social {
  display: flex;
  gap: var(--spacing-3);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-circle);
  color: rgba(255, 255, 255, 0.6);
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.footer__social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* 컬럼 제목 */
.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: #fff;
  margin-bottom: var(--spacing-5);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* 링크 목록 */
.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer__link {
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

/* 연락처 */
.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.footer__contact-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.5);
}

.footer__contact-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

/* ---- 푸터 하단: 저작권 + 법적 링크 ---- */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  padding: var(--spacing-4) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: var(--spacing-8);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer__bottom--simple {
  border-top: none;
}

.footer__copyright {
  line-height: var(--leading-relaxed);
}

.footer__company-info {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.35);
  margin-top: var(--spacing-1);
}

.footer__legal {
  display: flex;
  gap: var(--spacing-4);
}

.footer__legal a {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer__legal a:hover {
  color: var(--color-primary);
}

/* ---- Top 버튼 ---- */
.top-button {
  position: fixed;
  bottom: var(--spacing-6);
  right: var(--spacing-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-text-white);
  border: none;
  border-radius: var(--radius-circle);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base),
              visibility var(--transition-base),
              transform var(--transition-base),
              background-color var(--transition-fast);
  z-index: var(--z-fixed);
}

.top-button.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.top-button:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}

.top-button svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ---- 반응형 ---- */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .footer {
    padding-top: var(--spacing-8);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .footer__description {
    max-width: none;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .top-button {
    bottom: var(--spacing-4);
    right: var(--spacing-4);
    width: 40px;
    height: 40px;
  }
}