/* knowledge.css — 지식 저장소(master/detail).
 * 구 app/(app)/knowledge/layout.tsx + components/knowledge/* 이식.
 *
 * 반응형 정책(구버전 그대로):
 *   768px 미만 : 목록과 본문 중 하나만 보인다(라우트에 따라)
 *   768px 이상 : 목록(288px 고정) + 본문 동시 노출
 */

.knowledge-layout {
  display: flex;
  min-height: 0;
  min-width: 0;
  flex: 1;
}

/* ── 목록 패널 ────────────────────────────────────────────── */
.knowledge-list {
  display: flex;
  min-height: 0;
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: var(--background);
}

.knowledge-nav {
  padding: 12px;
}

.knowledge-group {
  margin-bottom: 16px;
}
.knowledge-group:last-child {
  margin-bottom: 0;
}

.knowledge-group-title {
  padding: 0 8px 4px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--muted-foreground);
}

.knowledge-items {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.knowledge-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  transition: background-color 0.15s;
}
.knowledge-item:hover {
  background: color-mix(in oklab, var(--accent) 50%, transparent);
}
.knowledge-item.is-active {
  background: var(--accent);
  color: var(--accent-foreground);
}

.knowledge-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-item-size {
  flex-shrink: 0;
  font-size: var(--text-xs);
  color: var(--muted-foreground);
  font-variant-numeric: tabular-nums;
}

/* ── 본문 패널 ────────────────────────────────────────────── */
.knowledge-detail {
  display: flex;
  min-height: 0;
  min-width: 0;
  flex: 1;
  flex-direction: column;
}

.knowledge-scroll {
  min-height: 0;
  flex: 1;
  overflow-y: auto;
}

.knowledge-body {
  max-width: 768px;
  margin: 0 auto;
  padding: 24px 16px;
}

@media (min-width: 768px) {
  .knowledge-body { padding: 32px; }
}

.knowledge-title {
  margin-bottom: 16px;
  font-size: var(--text-lg);
  font-weight: 600;
}

.knowledge-placeholder {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  font-size: var(--text-sm);
  color: var(--muted-foreground);
}

.knowledge-loading,
.knowledge-empty {
  padding: 16px;
  font-size: var(--text-sm);
  color: var(--muted-foreground);
}

.knowledge-error {
  padding: 16px;
  font-size: var(--text-sm);
  color: var(--destructive);
}

/* 모바일 전용 백 버튼 바 */
.knowledge-back-bar {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--background);
}

.knowledge-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}
.knowledge-back:hover {
  background: var(--accent);
}

.knowledge-back-name {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--text-sm);
  font-weight: 500;
}

/* ── 반응형 분기 ──────────────────────────────────────────── */
@media (max-width: 767px) {
  /* 목록 라우트: 목록만 full width */
  .knowledge-layout.is-list .knowledge-list { width: 100%; }
  .knowledge-layout.is-list .knowledge-detail { display: none; }
  /* 상세 라우트: 본문만 */
  .knowledge-layout.is-detail .knowledge-list { display: none; }
}

@media (min-width: 768px) {
  .knowledge-list {
    width: 288px;
    flex-shrink: 0;
  }
  /* 데스크탑은 좌측 목록이 항상 보이므로 백 버튼 불필요 */
  .knowledge-back-bar { display: none; }
}