/* ========================================================
   Footer — 신규 리뉴얼 디자인
   Design Token 출처: css/renewal.css (docs/design.md 기준)
   Figma: https://www.figma.com/design/kocBHAAZsTihmz8jmchBGE (node 187:695 "Footer")
   ======================================================== */

footer {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-dark-navy);
  font-size: var(--fs-14);
}

/* 배경 워터마크 (장식용, 스크린리더 숨김) */
.footer-watermark {
  position: absolute;
  left: 50%;
  bottom: -0.15em;
  transform: translateX(-50%);
  margin: 0;
  font-weight: 900;
  font-size: 22rem;
  line-height: 1;
  letter-spacing: 0.06em;
  white-space: nowrap;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  pointer-events: none;
  user-select: none;
  will-change: transform;
  backface-visibility: hidden;
}

.footer-layout {
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-48);
  padding: var(--space-64) 0;
}

/* Brand + Company Info */
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-16);
  flex-shrink: 0;
}

.footer-brand-logo {
  display: block;
  width: 136px;
  height: auto;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-info p {
  margin: 0;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.55);
}

/* Navigation + Contact */
.footer-nav {
  display: flex;
  gap: var(--space-24);
}

.footer-nav-col,
.footer-contact {
  width: 225px;
}

.footer-nav-title {
  margin: 0 0 var(--space-16);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.footer-nav-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-nav-col a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
}

.footer-nav-col a:hover,
.footer-nav-col a:focus-visible {
  color: var(--color-point);
}

.footer-contact dl {
  margin: 0;
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-contact-item+.footer-contact-item {
  margin-top: var(--space-12);
}

.footer-contact-item dt {
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.3);
}

.footer-contact-item dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.55);
}

.footer-contact-item a {
  color: inherit;
  text-decoration: none;
}

.footer-contact-item a:hover,
.footer-contact-item a:focus-visible {
  color: var(--color-point);
}

/* Bottom / Copyright */
.footer-bottom {
  padding: var(--space-16) 0;
}

.footer-copyright {
  margin: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.3);
}

/* ==================================================
   Responsive
   Figma에 별도 Mobile Footer Frame이 지정되지 않아
   docs/design.md 12. Responsive Rules(Mobile: 1 column stack)를 기준으로 구성.
   기존 프로젝트 breakpoint(1200px / 768px)를 재사용한다.
================================================== */

@media (max-width: 1200px) {
  .footer-watermark {
    font-size: 160px;
  }

  .footer-top {
    flex-direction: column;
    gap: var(--space-40);
    padding: var(--space-48) 0;
  }

  .footer-nav {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 768px) {
  .footer-watermark {
    font-size: 96px;
  }

  .footer-top {
    padding: var(--space-40) 0;
    gap: var(--space-32);
  }

  .footer-nav-col,
  .footer-contact {
    width: 100%;
  }

  .footer-bottom {
    padding: var(--space-12) 0;
  }
}

@media (max-width: 480px) {
  footer {
    font-size: 1.2rem;
  }
}