/*
  头像切换按钮的项目级样式。
  Reimu 主题继续负责头像尺寸、圆形裁剪、阴影和基础动画；这里仅清除按钮默认外观，
  并补充鼠标与键盘可识别的交互状态，避免改变侧栏原有布局。
*/
.sidebar-author-avatar-switcher {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  padding: 0;
  margin: 0;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  line-height: 0;
  font: inherit;
}

.sidebar-author-avatar-switcher:focus-visible {
  outline: 3px solid var(--color-link);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .sidebar-author-avatar-switcher img {
    transition: none;
    animation: none;
  }
}