/* =====================================================================
   tmc-auto 语言切换样式
   渲染策略：服务端单语渲染（?lang=zh|en），HTML 只含一种语言，
   因此这里只负责按钮样式与英文版局部排版微调，不做 lang-zh/lang-en 显隐。
   ===================================================================== */

/* 页眉语言切换按钮组 */
.tmc-langswitch {
	display: inline-flex;
	align-items: center;
	gap: 2px;
	margin-right: 10px;
	flex: 0 0 auto;
}
.tmc-langswitch__btn {
	font: inherit;
	font-size: 13px;
	line-height: 1;
	padding: 7px 9px;
	border: 1px solid currentColor;
	background: transparent;
	color: inherit;
	border-radius: 6px;
	cursor: pointer;
	opacity: .62;
	transition: opacity .15s ease, background-color .15s ease;
}
.tmc-langswitch__btn:hover { opacity: 1; }
.tmc-langswitch__btn.is-active {
	opacity: 1;
	font-weight: 600;
	background: rgba(127, 127, 127, .15);
}

/* 英文版：拉丁字母比中文窄，部分中文定宽容器需要松一点，避免换行怪异 */
body.lang-en .tmc-nav__link { letter-spacing: 0; }
body.lang-en .tmc-footer__title { letter-spacing: 0; }

/* 窄屏：按钮组不参与收缩，避免被 CTA 挤压变形 */
@media (max-width: 900px) {
	.tmc-langswitch { margin-right: 6px; }
	.tmc-langswitch__btn { padding: 6px 7px; font-size: 12px; }
}