/**
 * 独立页 / 阅读器左上角圆钮（知识库返回、VIP 返回/关闭共用）。
 * 视觉锁在知识库：40 圆、#f5f5f5、#666 图标。不要再平行做一套 pill。
 */

.mytheme-chrome-back,
.mytheme-kb-back {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	flex: none;
	width: var(--kb-back-size, 40px);
	height: var(--kb-back-size, 40px);
	min-width: var(--kb-back-size, 40px);
	min-height: var(--kb-back-size, 40px);
	padding: 0;
	margin: 0;
	border-radius: 9999px;
	background: #f5f5f5;
	color: #666;
	text-decoration: none;
}

.mytheme-chrome-back svg,
.mytheme-kb-back svg {
	display: block;
	width: 20px;
	height: 20px;
}

.mytheme-chrome-back svg[hidden],
.mytheme-kb-back svg[hidden] {
	display: none !important;
}

.mytheme-chrome-back:hover,
.mytheme-chrome-back:focus-visible,
.mytheme-kb-back:hover,
.mytheme-kb-back:focus-visible {
	color: #222;
	background: #ececec;
}

.mytheme-chrome-back:focus-visible,
.mytheme-kb-back:focus-visible {
	outline: 2px solid #111;
	outline-offset: 2px;
}