/* =============================================
   HANZOOM - layout.css
   Header / GNB / Footer / Mobile Menu
   ============================================= */

/* ─── Site Header ─── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
#site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pd);
}

/* Logo */
.logo-link { flex-shrink: 0; display: flex; align-items: center; }
.logo-img   { height: 36px; width: auto; }

/* ─── GNB ─── */
.gnb {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.gnb-list {
  display: flex;
  align-items: center;
  gap: 0;
}
.gnb-item {
  position: relative;
}
.gnb-link {
  display: flex;
  align-items: center;
  height: var(--header-height);
  padding: 0 1.125rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  transition: color 0.2s;
  position: relative;
}
.gnb-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1.125rem;
  right: 1.125rem;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}
.gnb-item:hover .gnb-link,
.gnb-item.active .gnb-link {
  color: var(--color-primary);
}
.gnb-item.active .gnb-link::after,
.gnb-item:hover .gnb-link::after {
  transform: scaleX(1);
}

/* Sub Menu */
.sub-menu {
  position: absolute;
  top: calc(var(--header-height) - 1px);
  left: 0;
  min-width: 180px;
  background: #fff;
  border-top: 2px solid var(--color-primary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 100;
}
.gnb-item:hover .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.sub-menu li a {
  display: block;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  transition: background 0.15s, color 0.15s;
}
.sub-menu li a:hover {
  background: var(--color-bg-section);
  color: var(--color-primary);
  padding-left: 1.5rem;
}

/* 제품 서브메뉴 (wide) */
.sub-menu--wide {
  min-width: 220px;
}
.sub-menu__group-title {
  padding: 0.625rem 1.25rem 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-teal);
  border-top: 1px solid var(--color-border);
  margin-top: 0.25rem;
}
.sub-menu__group-title:first-child {
  border-top: none;
  margin-top: 0;
}

/* ─── Header Right ─── */
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

/* 언어 전환 */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.lang-btn {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  padding: 0.25rem 0.375rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.lang-btn:hover,
.lang-btn.active {
  color: var(--color-primary);
  background: #EFF6FF;
}
.lang-divider {
  color: var(--color-border);
  font-size: 0.75rem;
}

/* CTA 버튼 */
.cta-btn {
  padding: 0.5rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
}
.cta-btn:hover {
  background: var(--color-primary-dk);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,96,184,0.3);
}

/* 햄버거 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  width: 32px;
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Mobile Menu ─── */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,22,40,0.5);
  z-index: 1100;
  opacity: 0;
  transition: opacity 0.3s;
}
.mobile-overlay.active {
  display: block;
  opacity: 1;
}
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100dvh;
  background: #fff;
  z-index: 1200;
  transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.mobile-menu.active {
  right: 0;
}
.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}
.mobile-logo { height: 28px; }
.mobile-close {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  padding: 0.25rem;
}
.mobile-menu__list { flex: 1; padding: 0.5rem 0; }
.mobile-menu__item { border-bottom: 1px solid var(--color-bg-section); }
.mobile-menu__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
}
.toggle-icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  transition: transform 0.25s;
}
.mobile-menu__toggle.open .toggle-icon { transform: rotate(180deg); }
.mobile-sub {
  display: none;
  background: var(--color-bg-section);
  padding: 0.25rem 0;
}
.mobile-sub.open { display: block; }
.mobile-sub li a {
  display: block;
  padding: 0.625rem 1.75rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color 0.15s;
}
.mobile-sub li a:hover { color: var(--color-primary); }
.mobile-menu__footer {
  padding: 1.25rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.mobile-cta {
  display: block;
  text-align: center;
  padding: 0.75rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
}
.mobile-lang {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.mobile-lang a { font-weight: 600; }
.mobile-lang a.active { color: var(--color-primary); }

/* ─── Footer ─── */
footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.8);
  padding: 4rem 0 2rem;
}
.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pd);
}
.footer-top {
  display: grid;
  grid-template-columns: 220px 1fr auto;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand { display: flex; flex-direction: column; gap: 1rem; }
.footer-logo { height: 32px; filter: brightness(0) invert(1); }
.footer-tagline {
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.5);
}

/* Footer 네비 */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.footer-nav__col h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.75rem;
}
.footer-nav__col ul li a {
  display: block;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.footer-nav__col ul li a:hover { color: var(--color-teal); }

/* Footer CTA */
.footer-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 1rem;
  min-width: 200px;
}
.footer-cta p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  max-width: 200px;
}
.footer-cta__btn {
  display: inline-block;
  padding: 0.625rem 1.5rem;
  background: var(--color-teal);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.footer-cta__btn:hover {
  background: var(--color-teal-lt);
  transform: translateY(-1px);
}

/* Footer Bottom */
.footer-bottom { padding-top: 2rem; }
.footer-info {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.45);
  line-height: 2;
  margin-bottom: 0.75rem;
}
.footer-info a:hover { color: rgba(255,255,255,0.7); }
.footer-copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
}

/* ─── Main content padding (header fixed) ─── */
main { padding-top: var(--header-height); }

/* 홈은 hero가 헤더 아래부터 시작 */
main.home-main { padding-top: 0; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .gnb { display: none; }
  .hamburger { display: flex; }
  .cta-btn { display: none; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
  .footer-cta { flex-direction: row; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  .footer-nav { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .footer-info br { display: none; }
  .lang-switch { display: none; }
}