/* ============================================
 * 页脚：surface-container-lowest、outline-variant 分割、社交 + 底栏导航
 * ============================================ */

.site-footer {
  box-sizing: border-box;
  margin-top: clamp(2rem, 5vw, 4rem);
  background-color: rgb(var(--mdui-color-surface-container-lowest));
  border-top: 1px solid rgb(var(--mdui-color-outline-variant));
}

.site-footer__container {
  box-sizing: border-box;
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

/* 与主内容区之间的留白由 .site-footer margin-top + 本容器 padding-top 共同形成 */

.site-footer__social-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.site-footer__social-intro {
  margin: 0 0 1rem;
  max-width: 36rem;
  font-size: var(--mdui-typescale-body-large-size, 1rem);
  font-weight: var(--mdui-typescale-body-large-weight, 400);
  line-height: var(--mdui-typescale-body-large-line-height, 1.5rem);
  color: rgb(var(--mdui-color-on-surface));
}

.site-footer__social {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.125rem 0.25rem;
}

mdui-button-icon.site-footer__social-btn {
  color: rgb(var(--mdui-color-on-surface-variant));
}

.site-footer__social-icon {
  font-size: 1.125rem;
  line-height: 1;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem 2rem;
}

.site-footer__meta {
  flex: 1 1 16rem;
  min-width: 0;
}

.site-footer__copyright {
  margin: 0;
  font-size: var(--mdui-typescale-label-medium-size, 0.75rem);
  line-height: var(--mdui-typescale-label-medium-line-height, 1rem);
  color: rgb(var(--mdui-color-on-surface-variant));
}

.site-footer__author {
  color: inherit;
  font-weight: 400;
}

.site-footer__sep {
  color: inherit;
}

.site-footer__powered {
  display: inline;
  color: inherit;
}

/* MDUI 2 原生正文链接样式（.mdui-prose a），与周围 label 字号对齐 */
.site-footer__powered-prose.mdui-prose {
  display: inline;
  margin: 0;
  padding: 0;
  line-height: inherit;
  font-size: inherit;
  vertical-align: baseline;
}

.site-footer__powered-prose.mdui-prose a {
  font-size: inherit;
  font-weight: 500;
  vertical-align: baseline;
  word-break: normal;
  overflow-wrap: normal;
}

.site-footer__powered-sep {
  margin: 0 0.125rem;
  color: inherit;
  font-size: inherit;
}

/* 底栏导航 */
.site-footer__nav {
  flex: 1 1 16rem;
  min-width: 0;
}

.site-footer__nav-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 1rem 1.25rem;
}

mdui-button.site-footer__nav-btn {
  flex-shrink: 0;
  color: rgb(var(--mdui-color-on-surface-variant));
  --mdui-comp-ripple-state-layer-color: color-mix(
    in srgb,
    rgb(var(--mdui-color-on-surface-variant)) 28%,
    transparent
  );
  font-size: var(--mdui-typescale-label-medium-size, 0.75rem);
  font-weight: 500;
}

mdui-button.site-footer__nav-btn::part(button) {
  min-height: 2.75rem;
  padding: 0 0.5rem;
  border-radius: var(--mdui-shape-corner-medium, 8px);
  border: none;
  background: transparent;
  box-shadow: none;
  color: inherit;
}