/* ========================================
   Header
   ======================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  height: var(--header-height);
  transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.35s ease;
}

.header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.header.is-hidden {
  transform: translateY(-100%);
}

/* Transparent mode */
.header--transparent {
  position: fixed;
  width: 100%;
  background-color: transparent;
}

.header--transparent .header__menu-link {
  color: var(--color-white);
}

.header--transparent .header__menu-link:hover {
  color: rgba(255, 255, 255, 0.7);
}

.header--transparent .header__hamburger-line {
  background-color: var(--color-white);
}

.header--transparent .header__logo img {
  filter: brightness(0) invert(1);
}

/* Scrolled state overrides transparent */
.header--transparent.is-scrolled {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
}

.header--transparent.is-scrolled .header__menu-link {
  color: var(--color-text-dark);
}

.header--transparent.is-scrolled .header__menu-link:hover {
  color: var(--color-primary);
}

.header--transparent.is-scrolled .header__hamburger-line {
  background-color: var(--color-dark);
}

.header--transparent.is-scrolled .header__logo img {
  filter: none;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.header__logo {
  flex-shrink: 0;
}

.header__logo img {
  width: 90px;
  height: auto;
}

/* Navigation */
.header__nav {
  display: none;
}

.header__menu {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}

.header__menu-link {
  font-size: var(--text-subheading);
  font-weight: 600;
  color: var(--color-text-dark);
  letter-spacing: -0.025rem;
  line-height: 1.4;
  transition: color 0.2s ease;
}

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

/* Actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__lang {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: 'Wanted Sans Variable', 'Wanted Sans', sans-serif;
}

.header__lang-item {
  position: relative;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
}

.header__lang-item + .header__lang-item::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -0.4375rem;
  width: 1px;
  height: 0.875rem;
  background-color: currentColor;
  opacity: 0.4;
  transform: translateY(-50%);
}

.header__lang-item a {
  position: relative;
  display: inline-block;
  padding: 4px 2px;
  color: var(--color-text-dark);
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.header__lang-item a::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: 0;
  height: 1.5px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.header__lang-item--active a,
.header__lang-item a:hover {
  opacity: 1;
}

.header__lang-item--active a::after,
.header__lang-item a:hover::after {
  transform: scaleX(1);
}

.header--transparent .header__lang-item {
  color: var(--color-white);
}

.header--transparent .header__lang-item a {
  color: var(--color-white);
}

.header--transparent.is-scrolled .header__lang-item {
  color: var(--color-text-dark);
}

.header--transparent.is-scrolled .header__lang-item a {
  color: var(--color-text-dark);
}

/* Hamburger */
.header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  padding: 4px 0;
}

.header__hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-dark);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Mobile Drawer */
.header__drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 200;
  visibility: hidden;
  pointer-events: none;
}

.header__drawer.is-open {
  visibility: visible;
  pointer-events: auto;
}

.header__drawer-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.header__drawer.is-open .header__drawer-overlay {
  opacity: 1;
}

.header__drawer-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 80%;
  max-width: 320px;
  height: 100%;
  background-color: var(--color-white);
  padding: var(--space-2xl);
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.header__drawer.is-open .header__drawer-content {
  transform: translateX(0);
}

.header__drawer-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header__drawer-close span {
  position: absolute;
  width: 1.5rem;
  height: 2px;
  background-color: var(--color-dark);
}

.header__drawer-close span:first-child {
  transform: rotate(45deg);
}

.header__drawer-close span:last-child {
  transform: rotate(-45deg);
}

.header__drawer-nav {
  margin-top: var(--space-5xl);
}

.header__drawer-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.header__drawer-link {
  font-size: var(--text-subtitle);
  font-weight: 600;
  color: var(--color-text-dark);
  letter-spacing: -0.07rem;
}

/* ========================================
   Desktop Dropdown
   ======================================== */

.header__menu-item {
  position: relative;
}

.header__submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 11rem;
  padding: var(--space-sm) 0;
  z-index: 10;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

/* 브랜드컬러 배경 확장 애니메이션 */
.header__submenu::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: var(--color-primary);
  border-radius: var(--dropdown-radius);
  z-index: -1;
  transition: height 0.2s cubic-bezier(0.4, 0, 1, 1);
}

/* 열린 상태 */
.header__menu-item--has-sub:hover .header__submenu,
.header__menu-item--has-sub.is-open .header__submenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.header__menu-item--has-sub:hover .header__submenu::before,
.header__menu-item--has-sub.is-open .header__submenu::before {
  height: 100%;
}

/* 서브메뉴 아이템 순차 페이드인 */
.header__submenu li {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  transition-delay: 0s;
}

.header__menu-item--has-sub:hover .header__submenu li,
.header__menu-item--has-sub.is-open .header__submenu li {
  opacity: 1;
  transform: translateY(0);
}

.header__menu-item--has-sub:hover .header__submenu li:nth-child(1) { transition-delay: 0.05s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(2) { transition-delay: 0.10s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(3) { transition-delay: 0.15s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(4) { transition-delay: 0.20s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(5) { transition-delay: 0.25s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(6) { transition-delay: 0.30s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(7) { transition-delay: 0.35s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(8) { transition-delay: 0.40s; }
.header__menu-item--has-sub:hover .header__submenu li:nth-child(9) { transition-delay: 0.45s; }

.header__submenu-link {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: -0.02rem;
  line-height: 1.6;
  white-space: nowrap;
  position: relative;
  z-index: 1;
  transition: opacity 0.15s ease;
}

.header__submenu-link:hover {
  opacity: 0.7;
}

.header__submenu-divider {
  padding: var(--space-sm) var(--space-lg) var(--space-xs);
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: -0.015rem;
  text-transform: uppercase;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  margin-top: var(--space-xs);
  position: relative;
  z-index: 1;
}

/* ========================================
   Mobile Drawer Accordion
   ======================================== */

.header__drawer-toggle {
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-subtitle);
  font-weight: 600;
  color: var(--color-text-dark);
  letter-spacing: -0.07rem;
}

.header__drawer-toggle::after {
  content: "";
  display: block;
  width: 0.625rem;
  height: 0.625rem;
  border-right: 2px solid var(--color-text-light);
  border-bottom: 2px solid var(--color-text-light);
  transform: rotate(45deg);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.header__drawer-toggle[aria-expanded="true"]::after {
  transform: rotate(-135deg);
}

.header__drawer-submenu {
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-md);
  padding-left: var(--space-md);
}

.header__drawer-item--has-sub.is-open .header__drawer-submenu {
  display: flex;
}

.header__drawer-sublink {
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.03rem;
  line-height: 1.5;
  transition: color 0.15s ease;
}

.header__drawer-sublink:hover {
  color: var(--color-primary);
}

/* Tablet+ */
@media (min-width: 768px) {
  .header__logo img {
    width: 100px;
  }

  .header__drawer-content {
    max-width: 400px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .header__nav {
    display: flex;
  }

  .header__hamburger {
    display: none;
  }

  .header__menu {
    gap: var(--space-4xl);
  }

  .header__logo img {
    width: 110px;
  }

}

@media (min-width: 1280px) {
  .header__menu {
    gap: var(--space-6xl);
  }
}