header{margin:0 auto;position:fixed;top:0;left:0;right:0;z-index:1000}
#app{margin:0;padding:0;min-height: 100svh;
  /* 또는 100dvh/100lvh 상황에 맞게 */}
.site-header-bar{display:flex;gap:var(--space-6);align-items:center;position:relative;z-index:1000;transition:background-color 0.3s ease,box-shadow 0.3s ease;padding: 3rem 2rem .5rem;}

/* 다크모드에서 헤더 스타일 */
.dark-mode .site-header-bar.scrolled {
}
.site-header-bar .brand{display:flex;align-items:center;margin-right:auto;position:relative}

/* 로고 스타일 */
.site-header-bar .brand .logo {
  height: 3rem;
  width: auto;
  display: block;
  position: relative;
  transition: filter var(--transition-duration) var(--transition-timing);
}
.site-nav{display:flex;gap:var(--space-4);align-items:center;padding:var(--space-4) 0;color:var(--color-muted)}
.site-nav a.active{color:var(--color-fg)}

/* 모바일 메뉴 버튼 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.mobile-menu-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn .menu-icon {
  position: relative;
  width: 20px;
  height: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mobile-menu-btn .line {
  width: 100%;
  height: 2px;
  background-color: var(--color-fg);
  border-radius: 1px;
  transition: all 0.3s ease;
  transform-origin: center;
}



/* 다크모드 토글 버튼 */
.dark-mode-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--color-fg);
}

.dark-mode-toggle:hover {
  background-color: var(--color-muted);
  color: var(--color-bg);
}

/* 다크모드 토글 버튼 아이콘 트랜지션 */
.dark-mode-toggle .sun-icon,
.dark-mode-toggle .moon-icon {
  transition: opacity var(--transition-duration) var(--transition-timing);
}

.dark-mode-toggle .sun-icon {
  display: none;
  opacity: 0;
}

.dark-mode-toggle .moon-icon {
  display: block;
  opacity: 1;
}

/* 다크모드에서 아이콘 상태 변경 */
.dark-mode .dark-mode-toggle .sun-icon {
  display: block;
  opacity: 1;
}

.dark-mode .dark-mode-toggle .moon-icon {
  display: none;
  opacity: 0;
}

/* 모바일 다크모드 토글 */
.mobile-nav-item.dark-mode-toggle {
  justify-content: space-between;
  padding: 12px 16px;
}

.mobile-nav-item.dark-mode-toggle .nav-text {
  margin-right: 8px;
}

.mobile-nav-item.dark-mode-toggle .sun-icon,
.mobile-nav-item.dark-mode-toggle .moon-icon {
  flex-shrink: 0;
}

/* 메뉴 버튼 활성화 상태 */
.mobile-menu-btn.active .line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active .line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active .line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 모바일 드롭다운 메뉴 */
.mobile-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  width: 50vw;
  background: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1001;
  overflow: hidden;
}

.mobile-menu-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 드롭다운 화살표 */
.mobile-menu-dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  right: 20px;
  width: 12px;
  height: 12px;
  background: var(--color-bg);
  border-left: 1px solid var(--color-muted);
  border-top: 1px solid var(--color-muted);
  transform: rotate(45deg);
  z-index: -1;
}

/* 모바일 네비게이션 */
.mobile-nav {
  display: flex;
  flex-direction: column;
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  color: var(--color-muted);
  text-decoration: none;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mobile-nav-item:hover {
  color: var(--color-fg);
  background-color: var(--color-muted);
}

.mobile-nav-item.active {
  color: var(--color-fg);
}

.mobile-nav-item .nav-text {
  flex: 1;
}

/* 데스크톱 네비게이션 */
.desktop-nav {
  display: flex;
}
#site-footer{width:100%; z-index:2;}
.site-footer{;color:var(--color-muted); position:absolute; bottom:16px; left:16px; right:16px; z-index:2;margin:0 auto;text-align:center;}
.page h1{font-size:clamp(24px,4vw,40px);margin:0 0 var(--space-6)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--space-4)}
.card{background:#ffffff;border:1px solid #222;border-radius:var(--radius-2);padding:var(--space-4);transition:transform .2s ease, border-color .2s ease}
.card:hover{transform:translateY(-2px);border-color:#333}
.contact-form{display:grid;gap:var(--space-4);max-width:560px}
.contact-form input,.contact-form textarea{width:100%;padding:12px;border-radius:8px;border:1px solid #333;background:#141414;color:var(--color-fg)}
.contact-form button{padding:10px 16px;border-radius:8px;background:var(--color-primary);border:none;color:#000;font-weight:600;cursor:pointer}
.state{background:#141414;border:1px solid #333;border-radius:8px;padding:16px}
.state.error{border-color:#ef4444}
.state.info{border-color:#666}
.state .btn{padding:8px 12px;border-radius:8px;background:#2a2a2a;border:1px solid #3a3a3a;color:#f5f5f5;margin-top:8px}

/* 모바일 최적화 */
@media (max-width: 991px) {
  #app{ padding : 0;}
  header{padding:1rem 0;}
  /* 데스크톱 네비게이션 숨김 */
  .desktop-nav {
    display: none;
  }
  
  /* 모바일 메뉴 버튼 표시 */
  .mobile-menu-btn {
    display: flex;
  }
  .site-footer{font-size:8px;display:absolute;bottom:16px;left:16px;right:16px;z-index:2;margin:0 auto;text-align:center;}
  /* 헤더 패딩 조정 */
  .site-header-bar {
    padding: .5rem 1rem 0 !important;
  }
  
  /* 로고 크기 조정 */
  .site-header-bar .brand .logo {
    height: 24px;
  }
}

/* 태블릿 최적화 */
@media (min-width: 768px) and (max-width: 991px) {
  .mobile-menu-dropdown {
    width: 220px;
  }
}

/* 작은 모바일 화면 */
@media (max-width: 480px) {
  .mobile-menu-dropdown {
    width: 180px;
    right: 0;
  }
  
  .site-header-bar .brand .logo {
    height: 20px;
  }
}