/* 顶栏：语言链接 + 冰蓝圆形搜索 + 展开搜索条 */
/* --hdr-search-red / --hdr-search-red-hover 由站点设置 btn_theme_search_* 注入 */
:root {
  --hdr-search-red: var(--td-btn-search-bg, #0ea5e9);
  --hdr-search-red-hover: var(--td-btn-search-hover, #0284c7);
}

.header-r2-inner {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px 14px;
}

.header-tools {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-lang-toggle__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 2px;
  font-size: 15px;
  font-weight: var(--hdr-r1-lang-fw, var(--hdr-r1-tools-fw, 400));
  color: var(--hdr-row-text, var(--nav-theme-text, var(--text)));
  text-decoration: none;
  line-height: 1.2;
  border: none;
  background: transparent;
  white-space: nowrap;
}

.header-lang-toggle__link:hover {
  opacity: 0.82;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.header-search-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--hdr-search-red);
  color: var(--td-btn-search-fg, #fff);
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(14, 165, 233, 0.35);
  transition: background 0.15s ease, transform 0.12s ease;
}

.header-search-trigger:hover {
  background: var(--hdr-search-red-hover);
}

.header-search-trigger:active {
  transform: scale(0.96);
}

.header-search-trigger__icon {
  display: block;
}

.header-search-panel {
  width: 100%;
  box-sizing: border-box;
  padding: 10px max(var(--page-pad), var(--safe-left)) 12px max(var(--page-pad), var(--safe-right));
  background: color-mix(in srgb, var(--header-bg, var(--card)) 92%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-search-panel[hidden] {
  display: none !important;
}

.header-search-panel--open {
  display: block;
}

.header-search-bar {
  display: flex;
  align-items: stretch;
  width: 100%;
  max-width: 720px;
  margin: 0 auto 0 0;
  gap: 0;
  box-sizing: border-box;
}

.header-search-bar__input {
  flex: 1 1 auto;
  min-width: 0;
  height: 44px;
  padding: 0 14px;
  border: 1px solid #d1d5db;
  border-right: none;
  border-radius: 4px 0 0 4px;
  background: #fff;
  color: #111827;
  font-size: 15px;
  box-sizing: border-box;
}

.header-search-bar__input::placeholder {
  color: #9ca3af;
}

.header-search-bar__input:focus {
  outline: 2px solid color-mix(in srgb, var(--hdr-search-red) 35%, transparent);
  outline-offset: 0;
  border-color: #9ca3af;
}

/* 手机顶栏：搜索图标与登录/语言同一行，无冰蓝圆钮 */
@media (max-width: 900px) {
  .site-header .header-search-trigger {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: auto !important;
    height: auto !important;
    min-width: 0;
    min-height: 0;
    padding: 2px 4px !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: transparent !important;
    color: var(--hdr-row-text, var(--nav-theme-text, var(--text))) !important;
    transform: none !important;
  }

  .site-header .header-search-trigger:hover,
  .site-header .header-search-trigger:active {
    background: transparent !important;
    opacity: 0.75;
    transform: none !important;
  }

  .site-header .header-search-trigger__icon {
    width: 1.4em;
    height: 1.4em;
    display: block;
  }
}

.header-search-bar__btn {
  flex: 0 0 auto;
  min-width: 88px;
  height: 44px;
  padding: 0 20px;
  border: none;
  border-radius: 0 4px 4px 0;
  background: var(--hdr-search-red);
  color: var(--td-btn-search-fg, #fff);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.header-search-bar__btn:hover {
  background: var(--hdr-search-red-hover);
}

@media (max-width: 900px) {
  .site-header .header-tools {
    gap: var(--hdr-r1-tools-gap, 3px);
  }

  .header-lang-toggle__link {
    font-size: 13px;
  }

  .header-search-trigger {
    width: 36px;
    height: 36px;
  }

  .header-search-bar {
    max-width: none;
  }

  .header-search-bar__btn {
    min-width: 72px;
    padding: 0 14px;
  }
}

@media (prefers-color-scheme: dark) {
  .header-search-bar__input {
    background: var(--input-bg, #0f172a);
    color: var(--text);
    border-color: var(--border);
  }
}

/* 后台顶栏 / 登录页语言切换 */
.admin-shell-tools .header-lang-toggle__link {
  color: var(--text, #0f172a);
}

.admin-login-topbar {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 20;
  padding: max(12px, env(safe-area-inset-top, 0px)) 16px 0 0;
}