/* ============================================================
   nav.css  —  상단 네비게이션 (드롭다운 포함)
   ============================================================ */

/* ── 네비 래퍼 ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-normal);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  gap: var(--space-8);
}

/* ── 로고 ── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
}

.nav__logo-mark {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  letter-spacing: -0.5px;
}

.nav__logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.5px;
}

.nav__logo-text span {
  color: var(--color-primary);
}

/* ── 메뉴 목록 ── */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
}

/* ── 각 메뉴 아이템 (드롭다운 포함) ── */
.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0 var(--space-4);
  height: var(--nav-height);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: color var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

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

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

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--space-4));
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* ── 화살표 아이콘 ── */
.nav__arrow {
  width: 14px;
  height: 14px;
  opacity: 0.5;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.nav__item.is-open .nav__arrow {
  transform: rotate(180deg);
  opacity: 1;
}

/* ── 드롭다운 패널 ── */
.nav__dropdown {
  position: absolute;
  top: calc(var(--nav-height) - 2px);
  left: 0;
  min-width: 300px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    opacity var(--transition-fast),
    visibility var(--transition-fast),
    transform var(--transition-fast);
  pointer-events: none;
}

/* JS로 제어 - is-open 클래스 추가 시 표시 */
.nav__item.is-open .nav__dropdown,
.nav__item:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* 드롭다운 항목 클릭 직후 hover 무시하여 강제 닫기
   (target="_blank"로 새 탭 열린 후 원래 페이지의 드롭다운이 떠있는 문제 방지) */
.nav__item.is-just-clicked .nav__dropdown,
.nav__item.is-just-clicked:hover .nav__dropdown {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: none;
}

/* 드롭다운 위 투명 bridge - hover gap 방지 */
.nav__dropdown::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

/* hover 시 화살표만 유지 */
.nav__item.is-open .nav__arrow,
.nav__item:hover .nav__arrow {
  transform: rotate(180deg);
  opacity: 1;
}
.nav__item.is-open > .nav__link,
.nav__item:hover > .nav__link {
  color: var(--color-primary);
}

/* ── 드롭다운 서비스 카드 (아이콘 + 설명) ── */
.nav__dd-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast);
  cursor: pointer;
}

.nav__dd-item:hover {
  background: var(--color-primary-light);
}

.nav__dd-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.nav__dd-item:hover .nav__dd-icon {
  background: var(--color-primary);
}

.nav__dd-item:hover .nav__dd-icon svg,
.nav__dd-item:hover .nav__dd-icon .dd-icon-char {
  filter: brightness(0) invert(1);
}

.dd-icon-char {
  font-size: 16px;
  line-height: 1;
}

.nav__dd-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav__dd-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semi);
  color: var(--color-text-primary);
  line-height: 1.2;
}

.nav__dd-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.3;
  white-space: nowrap;
}

/* ── 드롭다운 구분선 ── */
.nav__dd-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--space-2) var(--space-3);
}

/* ── 드롭다운: 지원/로그인 단순 목록 ── */
.nav__dd-simple {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  cursor: pointer;
}

.nav__dd-simple:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.nav__dd-simple .dd-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
}

.nav__dd-simple:hover .dd-dot {
  background: var(--color-primary);
}

/* ── 오른쪽 액션 영역 ── */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

/* ── 원격지원 버튼 ── */
.nav__btn-remote {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background: transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav__btn-remote:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ── 로그인 버튼 (드롭다운 있는 버튼) ── */
.nav__btn-login {
  position: relative;
}

.nav__btn-login-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semi);
  color: white;
  text-decoration: none;
  transition: background var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  border: none;
}

.nav__btn-login-trigger:hover {
  background: var(--color-primary-hover);
}

.nav__btn-login .nav__dropdown {
  left: auto;
  right: 0;
  min-width: 200px;
}

/* ── 로그인 드롭다운 버튼 ── */
.nav__login-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav__login-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.nav__login-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
}

/* ── 모바일 햄버거 ── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  margin-left: auto;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

/* ── 모바일 메뉴 ── */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: var(--space-4);
  z-index: calc(var(--z-sticky) - 1);
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

.nav__mobile.is-open { display: block; }

.nav__mobile-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.nav__mobile-item:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.nav__mobile-sub {
  padding-left: var(--space-6);
}

.nav__mobile-sub .nav__mobile-item {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-4);
}

.nav__mobile-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--space-2) 0;
}

/* ── 반응형 ── */
@media (max-width: 1024px) {
  .nav__menu,
  .nav__actions { display: none; }
  .nav__hamburger { display: flex; }
}