/* AI 助教 — 代码语言自定义下拉（作用域：.cf-assistant-welcome-lang） */

.cf-assistant-welcome-lang {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 0;
}

.cf-assistant-code-lang--header .cf-assistant-welcome-lang {
  align-items: flex-start;
  margin-top: 0;
}

/* 紧凑胶囊：header / 原 footer 共用 */

.cf-assistant-welcome-lang-label {
  display: block;
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  color: #667085;
  text-align: center;
}

.cf-assistant-welcome-lang-control {
  position: relative;
  width: 148px;
}

.cf-assistant-welcome-lang-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1px solid #d8e2f0;
  border-radius: 10px;
  background: #ffffff;
  color: #1f2937;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(22, 119, 255, 0.07);
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
}

.cf-assistant-welcome-lang-trigger-inner {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.cf-assistant-welcome-lang-icon {
  flex-shrink: 0;
  font-size: 11px;
  color: #1677ff;
  opacity: 0.85;
}

.cf-assistant-welcome-lang-value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cf-assistant-welcome-lang-chevron {
  flex-shrink: 0;
  margin-left: 6px;
  font-size: 10px;
  color: #667085;
  transition: transform 160ms ease;
}

.cf-assistant-welcome-lang-trigger:hover {
  border-color: #8ab8f8;
  background: #f8fbff;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.1);
}

.cf-assistant-welcome-lang-trigger:focus-visible,
.cf-assistant-welcome-lang--open .cf-assistant-welcome-lang-trigger {
  outline: none;
  border-color: #1677ff;
  box-shadow:
    0 2px 8px rgba(22, 119, 255, 0.07),
    0 0 0 3px rgba(22, 119, 255, 0.12);
}

.cf-assistant-welcome-lang--open .cf-assistant-welcome-lang-chevron {
  transform: rotate(180deg);
}

.cf-assistant-welcome-lang-menu {
  position: fixed;
  z-index: 12100;
  margin: 0;
  padding: 4px;
  list-style: none;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(31, 41, 55, 0.14);
  opacity: 0;
  transform: translateY(-4px);
  transition:
    opacity 150ms ease,
    transform 150ms ease;
  pointer-events: none;
}

.cf-assistant-welcome-lang-menu--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.cf-assistant-welcome-lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 34px;
  padding: 0 10px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 500;
  color: #344054;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.cf-assistant-welcome-lang-option:hover {
  background: #f0f6ff;
  color: #1677ff;
}

.cf-assistant-welcome-lang-option--selected {
  background: #eaf3ff;
  color: #1677ff;
  font-weight: 600;
}

.cf-assistant-welcome-lang-option-check {
  flex-shrink: 0;
  margin-left: 6px;
  font-size: 11px;
  color: #1677ff;
  opacity: 0;
  transition: opacity 160ms ease;
}

.cf-assistant-welcome-lang-option--selected .cf-assistant-welcome-lang-option-check {
  opacity: 1;
}

.theme--dark .cf-assistant-welcome-lang-label,
[data-theme='dark'] .cf-assistant-welcome-lang-label {
  color: #9198a1;
}

.theme--dark .cf-assistant-welcome-lang-trigger,
[data-theme='dark'] .cf-assistant-welcome-lang-trigger {
  background: #161b22;
  border-color: #30363d;
  color: #e6edf3;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
}

.theme--dark .cf-assistant-welcome-lang-trigger:hover,
[data-theme='dark'] .cf-assistant-welcome-lang-trigger:hover {
  background: #1c2330;
  border-color: #4493f8;
}

.theme--dark .cf-assistant-welcome-lang-menu,
[data-theme='dark'] .cf-assistant-welcome-lang-menu {
  background: #161b22;
  border-color: #30363d;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.42);
}

.theme--dark .cf-assistant-welcome-lang-option,
[data-theme='dark'] .cf-assistant-welcome-lang-option {
  color: #c9d1d9;
}

.theme--dark .cf-assistant-welcome-lang-option:hover,
[data-theme='dark'] .cf-assistant-welcome-lang-option:hover {
  background: rgba(68, 147, 248, 0.12);
  color: #4493f8;
}

.theme--dark .cf-assistant-welcome-lang-option--selected,
[data-theme='dark'] .cf-assistant-welcome-lang-option--selected {
  background: rgba(68, 147, 248, 0.18);
  color: #4493f8;
}

/* header 紧凑胶囊：与模型选择器同高同风格 */
.cf-assistant-welcome-lang--compact {
  align-items: flex-start;
  margin-top: 0;
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-control {
  width: auto;
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-menu {
  min-width: 120px;
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger {
  width: auto;
  height: var(--assistant-control-h, 26px);
  min-height: var(--assistant-control-h, 26px);
  padding: 0 8px;
  border-radius: 999px;
  border-color: var(--assistant-border-soft, #eaeef2);
  background: var(--assistant-surface-muted, #f6f8fa);
  box-shadow: none;
  font-size: 12px;
  font-weight: 500;
  color: var(--assistant-text-primary, #1f2328);
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-icon {
  display: none;
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger-inner {
  gap: 4px;
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-chevron {
  margin-left: 2px;
  font-size: 9px;
  color: var(--assistant-text-secondary, #57606a);
}

.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger:hover {
  color: var(--assistant-text-primary, #1f2328);
  border-color: rgba(9, 105, 218, 0.28);
  background: var(--assistant-surface-muted, #f6f8fa);
  box-shadow: none;
}

.cf-assistant-welcome-lang--compact.cf-assistant-welcome-lang--open .cf-assistant-welcome-lang-trigger,
.cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger:focus-visible {
  color: var(--assistant-text-primary, #1f2328);
  border-color: rgba(9, 105, 218, 0.4);
  background: var(--assistant-surface-muted, #f6f8fa);
  box-shadow: none;
}

.theme--dark .cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger,
[data-theme='dark'] .cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger {
  background: var(--assistant-surface-muted, #161b22);
  border-color: var(--assistant-border-soft, #21262d);
  box-shadow: none;
  color: var(--assistant-text-primary, #e6edf3);
}

.theme--dark .cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger:hover,
[data-theme='dark'] .cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger:hover {
  background: var(--assistant-surface-muted, #161b22);
  border-color: rgba(68, 147, 248, 0.35);
}

.theme--dark .cf-assistant-welcome-lang--compact.cf-assistant-welcome-lang--open .cf-assistant-welcome-lang-trigger,
.theme--dark .cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger:focus-visible,
[data-theme='dark'] .cf-assistant-welcome-lang--compact.cf-assistant-welcome-lang--open .cf-assistant-welcome-lang-trigger,
[data-theme='dark'] .cf-assistant-welcome-lang--compact .cf-assistant-welcome-lang-trigger:focus-visible {
  background: var(--assistant-surface-muted, #161b22);
  border-color: rgba(68, 147, 248, 0.5);
}