/* ============================================
   PETBALANCE — Navigation
   고정 상단바 / GNB / 메가메뉴 / 사이드 도트네비
   ============================================ */

/* ---- Top Bar ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: var(--transition-base);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-nav);
}

.nav__inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: var(--section-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ---- Logo ---- */
.nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav__logo-en {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--color-primary);
}

.nav__logo-en span {
  color: var(--color-accent);
}

.nav__logo-ko {
  font-family: var(--font-ko);
  font-size: 0.65rem;
  color: var(--color-text-sub);
  letter-spacing: 0.05em;
}

/* ---- GNB ---- */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 100%;
  margin-left: 80px;
}

.nav__item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav__link {
  position: relative;
  font-family: var(--font-en);
  font-size: var(--size-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-text);
  padding: 0.5rem 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition-base);
}

.nav__item:hover .nav__link {
  color: var(--color-primary);
}

.nav__item:hover .nav__link::after {
  width: 100%;
}

/* GNB 개별 드롭다운 (필요 시 HTML 주석 해제) */
.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-white);
  border-top: 2px solid var(--color-primary);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  min-width: 160px;
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  pointer-events: none;
  z-index: 999;
}

.nav__item:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.nav__dropdown-link {
  display: block;
  padding: 0.6rem 1.5rem;
  font-size: var(--size-sm);
  color: var(--color-text-sub);
  white-space: nowrap;
  text-align: center;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav__dropdown-link:hover {
  color: var(--color-primary);
  background: var(--color-bg-section);
}

/* ---- Right Controls ---- */
.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav__lang {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

.nav__lang svg {
  flex-shrink: 0;
}

/* ---- Hamburger ---- */
.nav__hamburger {
  position: relative;
  width: 26px;
  height: 18px;
  z-index: var(--z-hamburger);
}

.nav__hamburger span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: var(--transition-base);
}

.nav__hamburger span:nth-child(1) { top: 0; }
.nav__hamburger span:nth-child(2) { top: 8px; }
.nav__hamburger span:nth-child(3) { top: 16px; }

.nav__hamburger.active span:nth-child(1) {
  top: 8px;
  transform: rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
  top: 8px;
  transform: rotate(-45deg);
}

/* ---- Mega Menu (wooriwa 스타일 — 햄버거 클릭 시 상단 전체폭 드롭) ---- */
.nav__mega {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 100%;
  max-height: 0;
  overflow: hidden;
  background: var(--color-white);
  z-index: var(--z-mega);
  box-shadow: var(--shadow-nav);
  transition: max-height var(--transition-slow);
}

.nav__mega.active {
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

.nav__mega-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) 5%;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-md);
}

.nav__mega-col {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding-left: var(--space-sm);
  border-left: 1px solid var(--color-border);
}

.nav__mega-col:first-child {
  padding-left: 0;
  border-left: none;
}

.nav__mega-link {
  font-size: var(--size-sm);
  color: var(--color-text-sub);
  transition: var(--transition-base);
}

.nav__mega-link:hover {
  color: var(--color-primary);
}

/* ---- Side Nav Dots ---- */
.side-nav {
  position: fixed;
  top: 50%;
  right: 2.5rem;
  transform: translateY(-50%);
  z-index: var(--z-side-nav);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1.4rem;
}

.side-nav__item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
}

.side-nav__label {
  font-family: var(--font-en);
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  opacity: 0;
  transform: translateX(8px);
  transition: var(--transition-base);
}

.side-nav__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: var(--transition-base);
}

.side-nav__item:hover .side-nav__label {
  opacity: 1;
  transform: translateX(0);
}

.side-nav__item.active .side-nav__dot {
  background: var(--color-primary);
  transform: scale(1.3);
}

.side-nav__item.active .side-nav__label {
  opacity: 1;
  transform: translateX(0);
  color: var(--color-primary);
}

/* ============================================
   Responsive
   1024px: 사이드 도트네비 숨김, GNB → 햄버거 전용
   ============================================ */
@media (max-width: 1024px) {
  .nav__menu {
    display: none;
  }

  .side-nav {
    display: none;
  }

  .nav__mega-inner {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav__mega-inner {
    grid-template-columns: repeat(2, 1fr);
    padding: var(--space-md) 5%;
  }

  .nav__logo-ko {
    display: none;
  }
}