/* ============================================================
 * 专栏「作者自助置顶」按钮
 * 适用页面：frontend/column.html（/column/<user_id>）
 * 说明：按钮必须放在 <a class="lc-post-card"> 之外 —— 交互元素不能嵌套，
 *      否则点击置顶会同时触发卡片跳转。
 * ============================================================ */

.lc-post-card-wrap {
  position: relative;
  display: block;
}

.lc-post-pin-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--ds-neutral-200);
  border-radius: var(--ds-radius-full);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ds-neutral-500);
  font-size: 14px;
  cursor: pointer;
  box-shadow: var(--ds-shadow-xs);
  opacity: 0;
  transition: opacity 0.2s ease, color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.lc-post-card-wrap:hover .lc-post-pin-toggle,
.lc-post-card-wrap:focus-within .lc-post-pin-toggle {
  opacity: 1;
}
.lc-post-pin-toggle:hover {
  color: var(--ds-warning-600, var(--ds-warning-500));
  background: var(--ds-warning-50);
  border-color: var(--ds-warning-300, var(--ds-warning-200));
}
.lc-post-pin-toggle.is-pinned {
  opacity: 1;
  color: var(--ds-warning-700, var(--ds-warning-500));
  background: var(--ds-warning-50);
  border-color: var(--ds-warning-300, var(--ds-warning-200));
}
.lc-post-pin-toggle:disabled {
  opacity: 0.5 !important;
  cursor: default;
}

/* 触屏无 hover：置顶按钮必须常显，否则作者够不到 */
@media (hover: none) {
  .lc-post-pin-toggle {
    opacity: 1;
  }
}

/* 移动端：热区放到 44×44（P1-3 严格组口径） */
@media (max-width: 768px) {
  .lc-post-pin-toggle {
    top: 8px;
    right: 8px;
    width: 44px;
    height: 44px;
    font-size: 15px;
  }
}

/* 暗色主题 */
[data-theme="dark"] .lc-post-pin-toggle {
  background: rgba(31, 41, 55, 0.9);
  border-color: var(--ds-neutral-300, var(--ds-neutral-200));
}