/* ================================================================
 * nav.css - 네비게이션 바, 메가메뉴, 모바일 햄버거, 언어선택, 로그인
 * Homepage CSS Module
 * ================================================================ */

/* ── 네비게이션 바 ──────────────────────── */
#navbar {
  --nav-h: 90px;
  position: fixed; top:0; left:0; right:0; z-index:1000;
  background: linear-gradient(180deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.4) 55%, transparent 100%);
  border-bottom: none;
  transition: background .3s, border-color .3s, box-shadow .3s;
}
.nav-top {
  height: var(--nav-h, 90px);
  display: flex; align-items: center; justify-content: center;
  padding: 0 60px;
  position: relative;
}

/* 스크롤 후 나타날 때 */
#navbar.nav-show {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: var(--nav-shadow);
}
#navbar.nav-show .nav-menu > li > a {
  color: var(--nav-text);
}
#navbar.nav-show .nav-menu > li > a:hover,
#navbar.nav-show .nav-menu > li > a.active {
  color: var(--nav-text-hover);
}
#navbar.nav-show .nav-toggle span {
  background: var(--nav-text);
}

/* 히어로 위에서 호버 시 */
#navbar:hover {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: var(--nav-shadow);
}
#navbar:hover .nav-menu > li > a {
  color: var(--nav-text);
}
#navbar:hover .nav-menu > li > a:hover,
#navbar:hover .nav-menu > li > a.active {
  color: var(--nav-text-hover);
}
#navbar:hover .nav-toggle span {
  background: var(--nav-text);
}

/* ── 로고 ──────────────────────── */
.logo {
  position: absolute;
  left: calc(50% - 580px);
  display:flex; align-items:center;
  text-decoration:none;
}
.logo-img {
  height:44px; width:auto; display:block;
}

/* ── 메뉴 ──────────────────────── */
.nav-menu {
  display:grid; grid-template-columns: repeat(4, 200px);
  justify-content:center;
  align-items:center;
  list-style:none;
}
.nav-menu:has(> li:nth-child(5)) {
  grid-template-columns: repeat(5, 200px);
}
.nav-menu > li { position:relative; text-align:center; }
.nav-menu > li > a {
  display:block; padding:12px 24px;
  color: rgba(255,255,255,0.9); text-decoration:none;
  font-size:1.18rem; font-weight:700; letter-spacing:.3px;
  cursor:pointer;
  transition: color .25s;
}
.nav-menu > li > a:hover,
.nav-menu > li > a.active {
  color: #111;
}

/* ── 메가 드롭다운 ──────────────────────── */
.mega-dropdown {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, opacity .3s ease;
  opacity: 0;
}
#navbar:hover .mega-dropdown {
  max-height: 300px;
  opacity: 1;
}
.mega-line {
  height: 1px;
  background: rgba(0,0,0,0.1);
}
.mega-inner {
  display: grid;
  grid-template-columns: repeat(4, 200px);
  justify-content: center;
  padding: 18px 60px 24px;
}
.mega-inner:has(> div:nth-child(5)) {
  grid-template-columns: repeat(5, 200px);
  padding: 24px 60px 28px;
}
.mega-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.mega-col-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 12px 0;
  margin-top: 6px;
  opacity: 0.7;
}
.mega-col-label:first-child { margin-top: 0; }
.mega-col a {
  display: block;
  padding: 5px 12px;
  color: var(--surface-muted);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 400;
  cursor: pointer;
  transition: color .2s;
  white-space: nowrap;
}
.mega-col a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── 메가메뉴 2단 하위메뉴 ──────────────────────── */
.mega-has-sub {
  position: relative;
}
.mega-sub-trigger {
  display: block;
  padding: 5px 12px;
  color: var(--surface-muted);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: color .2s;
  white-space: nowrap;
}
.mega-arrow {
  font-size: .8rem;
  margin-left: 4px;
  opacity: .5;
}
.mega-sub-menu {
  display: none;
  position: absolute;
  left: 100%;
  top: -8px;
  background: var(--nav-bg);
  border: 1px solid var(--surface-line);
  border-radius: 8px;
  box-shadow: var(--nav-shadow);
  padding: 8px 0;
  min-width: 180px;
  z-index: 100;
}
.mega-sub-menu a {
  display: block;
  padding: 8px 20px;
  color: var(--surface-muted);
  text-decoration: none;
  font-size: .92rem;
  white-space: nowrap;
  transition: color .2s, background .2s;
}
.mega-sub-menu a:hover {
  color: var(--accent);
  background: rgba(255,107,0,0.05);
}
.mega-has-sub:hover .mega-sub-trigger {
  color: var(--accent);
}
.mega-has-sub:hover .mega-sub-menu {
  display: block;
}

/* ── CTA 버튼 (nav) ──────────────────────── */
.nav-cta {
  padding: 9px 22px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: var(--bg) !important;
  border-radius:8px; font-weight:700 !important;
}
.nav-cta:hover { opacity:.85; transform:translateY(-1px); }

/* ── NAV HAMBURGER (MOBILE) ──────────────────────── */
.nav-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  width: 44px; height: 44px;
  flex-direction: column; justify-content: center; align-items: center;
  gap: 5px; padding: 0;
  z-index: 1100;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle.open span { background: #fff !important; }

/* ── 네비 우측 유틸 영역 ──────────────────────── */
.nav-utils {
  position: absolute;
  right: 80px;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ── 언어 셀렉트 드롭다운 ──────────────────────── */
.lang-select {
  position: relative;
}
.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.9);
  padding: 5px 10px;
  height: 36px;
  border-radius: 8px;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .25s;
  white-space: nowrap;
}
.lang-current:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.1);
}
.lang-flag {
  border-radius: 2px;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}
.lang-arrow {
  transition: transform .25s;
  opacity: 0.6;
}
.lang-select:hover .lang-arrow,
.lang-select.open .lang-arrow {
  transform: rotate(180deg);
}
.lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 130px;
  background: var(--nav-bg);
  border-radius: 8px;
  box-shadow: var(--nav-shadow);
  padding: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all .2s;
  z-index: 9999;
}
.lang-select:hover .lang-dropdown,
.lang-select.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.lang-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: .84rem;
  font-weight: 500;
  color: var(--nav-text);
  text-decoration: none;
  transition: background .15s;
}
.lang-option:hover {
  background: var(--surface-input);
}
.lang-option.active {
  background: rgba(255,107,0,0.08);
  color: #ff6b00;
  font-weight: 600;
}

/* 스크롤/서브페이지 상태 — 언어 셀렉트 */
#navbar.nav-show .lang-current,
#navbar:hover .lang-current {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
#navbar.nav-show .lang-current:hover,
#navbar:hover .lang-current:hover {
  background: var(--nav-util-hover-bg);
  border-color: var(--nav-util-border);
}
body.subpage .lang-current {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
body.subpage .lang-current:hover {
  background: var(--nav-util-hover-bg);
  border-color: var(--nav-util-border);
}

/* ── 로그아웃 버튼 ──────────────────────── */
.nav-auth {
  display: flex;
  align-items: center;
}
.nav-logout-form {
  display: inline;
  margin: 0;
  padding: 0;
}
.nav-login-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.4);
  color: rgba(255,255,255,0.9);
  padding: 5px 14px;
  border-radius: 6px;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .25s;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}
.nav-login-btn:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.6);
}
#navbar.nav-show .nav-login-btn,
#navbar:hover .nav-login-btn {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
#navbar.nav-show .nav-login-btn:hover,
#navbar:hover .nav-login-btn:hover {
  background: var(--nav-util-hover-bg);
  border-color: var(--nav-util-border);
}
body.subpage .nav-login-btn {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
body.subpage .nav-login-btn:hover {
  background: var(--nav-util-hover-bg);
  border-color: var(--nav-util-border);
}

/* ── 어드민 버튼 ──────────────────────── */
.nav-admin-btn {
  text-decoration: none;
  color: rgba(255,255,255,0.9);
  font-size: .82rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.3);
  transition: all .2s;
}
.nav-admin-btn:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.5);
}
#navbar.nav-show .nav-admin-btn,
#navbar:hover .nav-admin-btn {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
#navbar.nav-show .nav-admin-btn:hover,
#navbar:hover .nav-admin-btn:hover {
  background: var(--nav-util-hover-bg);
}
body.subpage .nav-admin-btn {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
body.subpage .nav-admin-btn:hover {
  background: var(--nav-util-hover-bg);
}

/* ── 모바일 반응형 ──────────────────────── */
@media(max-width:900px) {
  .nav-top { padding:0 24px; justify-content: space-between; }
  .logo { position: static; }
  .nav-toggle { display: flex; }
  .mega-dropdown { display: none; }
  .nav-utils {
    position: static;
    margin-right: 8px;
    gap: 8px;
  }
  .nav-login-btn {
    padding: 4px 10px;
    font-size: .78rem;
  }
  .lang-current {
    padding: 4px 8px;
    height: 32px;
    font-size: .78rem;
  }
  .nav-menu {
    display: flex;
    position: fixed;
    top: var(--nav-h, 90px); left: 0; right: 0;
    background: rgba(5,8,15,0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    max-height: calc(100vh - var(--nav-h, 90px));
    overflow-y: auto;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: all .3s ease;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu > li {
    width: 100%;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-menu > li:last-child { border-bottom: none; }
  .nav-menu > li > a {
    display: block; padding: 14px 8px;
    font-size: .95rem;
    color: rgba(255,255,255,0.9) !important;
  }
  .nav-menu > li > a:hover,
  .nav-menu > li > a.active {
    background: rgba(255,255,255,0.1);
    color: #fff !important;
  }
}

/* ── 다크모드 토글 버튼 ──────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  background: none;
  color: rgba(255,255,255,0.9);
  cursor: pointer;
  transition: all .25s;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.1);
}
/* 스크롤/호버/서브페이지 상태 */
#navbar.nav-show .theme-toggle,
#navbar:hover .theme-toggle,
body.subpage .theme-toggle {
  color: var(--nav-text);
  border-color: var(--nav-util-border);
}
#navbar.nav-show .theme-toggle:hover,
#navbar:hover .theme-toggle:hover,
body.subpage .theme-toggle:hover {
  background: var(--nav-util-hover-bg);
  border-color: var(--nav-util-border);
}
/* 아이콘 표시/숨김 */
.theme-icon-sun { display: none; }
.theme-icon-moon { display: block; }
html[data-theme="dark"] .theme-icon-sun { display: block; }
html[data-theme="dark"] .theme-icon-moon { display: none; }

/* 다크모드에서 히어로 위 투명 nav의 토글도 밝은 색 유지 */
html[data-theme="dark"] .theme-toggle {
  color: rgba(255,255,255,0.9);
  border-color: rgba(255,255,255,0.3);
}
html[data-theme="dark"] .theme-toggle:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}

@media (max-width: 900px) {
  .theme-toggle {
    width: 32px;
    height: 32px;
  }
}