/* 文章内题单卡片：#problem-list 表头 ... #problem-list（表头仿 labuladong 折叠面板 summary） */
.markdown-body .problem-list-card {
  --pl-border: #c2c2c4;
  --pl-border-soft: rgba(194, 194, 196, 0.45);
  --pl-card: #f6f6f7;
  --pl-bg: #ffffff;
  --pl-fg: #364153;
  --pl-heading: #101828;
  --pl-muted: rgba(60, 60, 67, 0.72);
  --pl-primary: #3b82f6;
  --pl-hover: rgba(142, 150, 170, 0.06);
  --pl-skeleton: rgba(142, 150, 170, 0.16);
  --pl-none: #c2c2c4;
  --pl-failed: #ef4444;
  --pl-accepted: #10b981;

  margin: 16px 0;
  border: 1px solid var(--pl-border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--pl-card);
  color: var(--pl-fg);
  font-size: 16px;
  line-height: 28px;
}

.markdown-body .problem-list-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(142, 150, 170, 0.03);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background-color 0.15s ease;
}

.markdown-body .problem-list-card__header::-webkit-details-marker {
  display: none;
}

.markdown-body .problem-list-card__header:hover {
  background: rgba(142, 150, 170, 0.05);
}

.markdown-body .problem-list-card__icon,
.markdown-body .problem-list-card__chevron {
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
}

.markdown-body .problem-list-card__icon {
  color: var(--pl-primary);
}

.markdown-body .problem-list-card__title {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.markdown-body .problem-list-card__count {
  flex: 0 0 auto;
  color: var(--pl-muted);
  font-size: 13px;
}

.markdown-body .problem-list-card__chevron {
  color: var(--pl-muted);
  transition: transform 0.26s cubic-bezier(0.4, 0, 0.2, 1);
}

.markdown-body .problem-list-card[open]:not([data-pl-anim='closing']) > .problem-list-card__header .problem-list-card__chevron {
  transform: rotate(90deg);
}

.markdown-body .problem-list-card__body {
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
  border-top: 1px solid var(--pl-border-soft);
  background: var(--pl-bg);
}

.markdown-body .problem-list-card__row,
.markdown-body .problem-list-card__message {
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
  font-size: 15px !important;
  line-height: 22px !important;
}

.markdown-body .problem-list-card__row + .problem-list-card__row {
  border-top: 1px solid var(--pl-border-soft);
}

.markdown-body .problem-list-card__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  color: var(--pl-fg) !important;
  font-weight: 400 !important;
  text-decoration: none !important;
  border-bottom: none !important;
  transition: background-color 0.15s ease;
}

.markdown-body a.problem-list-card__link:hover {
  background: var(--pl-hover);
}

.markdown-body a.problem-list-card__link:hover .problem-list-card__name {
  color: var(--pl-primary);
}

.markdown-body .problem-list-card__pid {
  flex: 0 0 auto;
  min-width: 64px;
  color: var(--pl-muted);
  font-family: ui-monospace, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  font-size: 13px;
}

.markdown-body .problem-list-card__name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  color: var(--pl-heading);
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.markdown-body .problem-list-card__name--missing {
  color: var(--pl-muted);
  font-style: italic;
}

.markdown-body .problem-list-card__status {
  display: inline-flex;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.markdown-body .problem-list-card__status svg {
  width: 18px;
  height: 18px;
}

.markdown-body .problem-list-card__status--none {
  color: var(--pl-none);
}

.markdown-body .problem-list-card__status--failed {
  color: var(--pl-failed);
}

.markdown-body .problem-list-card__status--accepted {
  color: var(--pl-accepted);
}

/* 加载态骨架行 */
.markdown-body .problem-list-card__row--skeleton {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px !important;
  animation: problem-list-pulse 1.4s ease-in-out infinite;
}

.markdown-body .problem-list-card__row--skeleton > span {
  display: block;
  height: 14px;
  border-radius: 4px;
  background: var(--pl-skeleton);
}

.markdown-body .problem-list-card__row--skeleton > span:nth-child(1) {
  flex: 0 0 56px;
}

.markdown-body .problem-list-card__row--skeleton > span:nth-child(2) {
  flex: 0 1 55%;
}

.markdown-body .problem-list-card__row--skeleton > span:nth-child(3) {
  flex: 0 0 18px;
  height: 18px;
  margin-left: auto;
  border-radius: 50%;
}

@keyframes problem-list-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.markdown-body .problem-list-card__message {
  padding: 14px 16px !important;
  color: var(--pl-muted);
}

.markdown-body .problem-list-card__retry {
  padding: 0;
  border: none;
  background: none;
  color: var(--pl-primary);
  font: inherit;
  cursor: pointer;
}

.markdown-body .problem-list-card__retry:hover {
  text-decoration: underline;
}

.theme--dark .markdown-body .problem-list-card {
  --pl-border: #3c3f44;
  --pl-border-soft: rgba(60, 63, 68, 0.7);
  --pl-card: #161b22;
  --pl-bg: #0d1117;
  --pl-fg: #c9d1d9;
  --pl-heading: #e6edf3;
  --pl-muted: rgba(235, 235, 245, 0.55);
  --pl-primary: #60a5fa;
  --pl-hover: rgba(101, 117, 133, 0.16);
  --pl-skeleton: rgba(101, 117, 133, 0.22);
  --pl-none: #484f58;
  --pl-failed: #f85149;
  --pl-accepted: #3fb950;
}