/* ==========================================
   site-header.css - 全站通用导航栏/语言/移动端菜单
   由 home-header.css 抽取，供跨页面复用（如 home、login）
   ========================================== */

/* Header：实心底，禁止 backdrop-filter。
   Chrome 对「固定顶栏 + backdrop-filter」在滚动时会把下方文字错绘到导航前面；
   外扩采样伪元素治不好，还会盖住页面。毛玻璃装饰不值得这个致命闪烁。 */
.header {
  background: #ffffff;
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.header .nav-link {
  color: #64748b !important;
  font-weight: 400;
  font-size: 14px;
}

.header .brand-text {
  color: var(--primary-blue) !important;
  font-weight: 700;
}

.header [data-lt-icon="language"],
.header .fas.fa-language {
  color: var(--primary-blue) !important;
}

/* Header Grid 布局 */
.header-container {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.header-logo {
  justify-self: start;
  flex-shrink: 0;
}

.header-nav {
  justify-self: center;
  display: flex;
  justify-content: center;
  white-space: nowrap;
  gap: 1.15rem;
}

.header-nav a {
  flex-shrink: 0;
}

.header-actions {
  justify-self: end;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 导航栏登录按钮紧凑样式 */
.header-actions .btn-secondary {
  padding: 6px 12px;
  font-size: 12px;
  white-space: nowrap;
  flex-shrink: 0;
  max-width: 100px;
}

.header-actions .btn-secondary img {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.header-actions .btn-secondary span {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 移动端 header 布局调整 */
@media (max-width: 768px) {
  .header-container {
    grid-template-columns: 1fr auto;
    gap: 1rem;
  }

  .header-nav {
    display: none !important;
  }

  .header-actions {
    justify-self: end;
  }

  .header-actions .btn-secondary {
    padding: 5px 10px;
    font-size: 11px;
    max-width: 90px;
  }
}

/* 大屏幕调整 */
@media (min-width: 1280px) {
  .header-container {
    grid-template-columns: 200px 1fr auto;
  }

  .header-actions .btn-secondary {
    padding: 7px 14px;
    font-size: 13px;
    max-width: 110px;
  }
}

/* ========== 移动端菜单 ========== */
.mobile-menu {
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.mobile-menu.active {
  transform: translateX(0);
}

/* 移动端菜单：实心底，不用 backdrop-filter（同顶栏，避免滚动合成闪烁） */
.glass-white {
  background: #ffffff;
  border-left: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

/* ========== 用户下拉菜单 ========== */
/* 左缘对齐头像左缘（left:0）。宽度跟最长文案走，菜单不折行。 */
.profile-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 0.25rem);
  left: 0;
  right: auto;
  width: fit-content;
  min-width: 12.5rem;
  max-width: min(24rem, calc(100vw - 1.5rem));
  margin: 0;
  background-color: #ffffff;
  border-radius: 0.75rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  z-index: 50;
  padding: 0.5rem 0;
  transform-origin: top left;
  border: 1px solid rgba(243, 244, 246, 1);
}

.profile-dropdown p,
.profile-dropdown a {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-dropdown a .lt-icon-wrap {
  flex-shrink: 0;
}

.profile-dropdown a [data-i18n] {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 透明连接区域，确保鼠标移动时不会断开 hover 状态 */
.profile-dropdown::before {
  content: '';
  position: absolute;
  top: -0.25rem;
  left: 0;
  right: 0;
  height: 0.25rem;
  background: transparent;
}

.profile-wrapper {
  position: relative;
}

.profile-wrapper:hover .profile-dropdown,
.profile-dropdown:hover {
  display: block;
  animation: menu-appear 0.2s ease;
}

@keyframes menu-appear {
  0% { opacity: 0; transform: scale(0.95); }
  100% { opacity: 1; transform: scale(1); }
}

/* ========== 语言选择器 ========== */
.language-selector-container {
  position: relative;
  display: flex;
  align-items: center;
}

.language-toggle {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: 20px;
  padding: 6px 12px;
  color: #374151;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.language-toggle .lt-icon,
.language-toggle i {
  color: var(--primary-blue);
  font-size: 12px;
}

.language-toggle [data-lt-icon="chevron-down"] .lt-icon,
.language-toggle i.fa-chevron-down {
  font-size: 10px;
  transition: transform 0.2s ease;
}

.language-selector-container:hover .language-toggle [data-lt-icon="chevron-down"] .lt-icon,
.language-selector-container:hover .language-toggle i.fa-chevron-down {
  transform: rotate(180deg);
}

.language-toggle:hover {
  background: rgba(255, 255, 255, 1);
  border-color: var(--primary-blue-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.15);
}

.language-text {
  min-width: 16px;
  text-align: center;
}

/* 语言下拉菜单：左缘对齐触发按钮，宽度向右展开 */
.language-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: auto;
  padding-top: 8px;
  z-index: 100;
}

.language-dropdown::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: transparent;
}

.language-dropdown-inner {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(226, 232, 240, 0.8);
  min-width: 160px;
  overflow: hidden;
  animation: dropdownFadeIn 0.2s ease;
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.language-selector-container:hover .language-dropdown {
  display: block;
}

.language-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: #374151;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.language-option:hover {
  background: rgba(59, 130, 246, 0.08);
  color: var(--primary-blue);
}

.language-option.active {
  background: rgba(59, 130, 246, 0.12);
  color: var(--primary-blue);
}

.lang-flag {
  width: 24px;
  height: 16px;
  object-fit: cover;
  border-radius: 3px;
  flex-shrink: 0;
  display: block;
}

/* 移动端语言选择器 */
.language-selector-container.mobile .language-dropdown {
  left: 0;
  right: auto;
}

#mobile-language-toggle {
  background: rgba(243, 244, 246, 0.9);
  border-color: rgba(209, 213, 219, 0.8);
  color: #374151;
}

#mobile-language-toggle i {
  color: var(--primary-blue);
}

#mobile-language-toggle:hover {
  background: rgba(243, 244, 246, 1);
  border-color: var(--primary-blue-light);
}