/**
 * knowledge-page.css — 知识库页面样式
 * RAG 检索增强生成 · 冷灰白基调 · 克制专业
 * 所有样式以 .kb- 为前缀，限定在 #page-knowledge 内
 * ============================================================================
 */

/* ==========================================================================
   Layout
   ========================================================================== */

#page-knowledge {
  background: var(--bg-page);
  position: relative;
}

#page-knowledge .kb-layout {
  display: flex;
  width: 100%;
  height: calc(100% - 36px); /* 留出底部 disclaimer 空间 */
  overflow: hidden;
}

/* ==========================================================================
   Sidebar (260px)
   ========================================================================== */

.kb-sidebar {
  width: 250px;
  min-width: 250px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: #F4F6F9;
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
}

.kb-sidebar-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px 10px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 0.5px solid var(--border-subtle);
  flex-shrink: 0;
}

.kb-sidebar-header svg {
  color: var(--state-ok);
  flex-shrink: 0;
}

.kb-category-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px;
}

.kb-category-list::-webkit-scrollbar { width: 3px; }
.kb-category-list::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 2px; }

.kb-cat-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 10px;
  margin-bottom: 2px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
  text-align: left;
}

.kb-cat-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.kb-cat-btn.active {
  background: rgba(16, 185, 129, 0.06);
  color: #059669;
  font-weight: 600;
}

.kb-cat-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.kb-cat-count {
  margin-left: auto;
  font-size: 10.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.kb-sidebar-stats {
  display: flex;
  border-top: 0.5px solid var(--border-subtle);
  padding: 10px 16px;
  gap: 16px;
  flex-shrink: 0;
}

.kb-stat-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.kb-stat-num {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.kb-stat-label {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.kb-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px 18px;
  min-width: 0;
}

.kb-main::-webkit-scrollbar { width: 5px; }
.kb-main::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 3px; }
.kb-main::-webkit-scrollbar-track { background: transparent; }

/* ==========================================================================
   Search
   ========================================================================== */

.kb-search-section {
  flex-shrink: 0;
  margin-bottom: 12px;
}

.kb-search-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.kb-search-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: #fff;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.kb-search-input-wrap:focus-within {
  border-color: var(--state-ok);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.08);
}

.kb-search-input-wrap svg {
  color: var(--text-muted);
  flex-shrink: 0;
}

.kb-search-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 12.5px;
  color: var(--text-primary);
  font-family: inherit;
  background: transparent;
}

.kb-search-input::placeholder { color: var(--text-muted); }

.kb-btn-clear {
  width: 34px;
  height: 34px;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.kb-btn-clear:hover { color: var(--state-critical); border-color: var(--state-critical); }

/* RAG row */
.kb-rag-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.kb-rag-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: rgba(16, 185, 129, 0.03);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.kb-rag-input-wrap:focus-within {
  border-color: var(--state-ok);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.kb-rag-input-wrap svg { color: var(--state-ok); flex-shrink: 0; }

.kb-rag-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 12.5px;
  color: var(--text-primary);
  font-family: inherit;
  background: transparent;
}

.kb-rag-input::placeholder { color: var(--text-muted); }

.kb-btn-rag {
  padding: 9px 16px;
  background: var(--state-ok);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  font-family: inherit;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.kb-btn-rag:hover { background: #059669; box-shadow: 0 2px 8px rgba(16,185,129,0.25); }
.kb-btn-rag:active { transform: scale(0.97); }
.kb-btn-rag:disabled { opacity: 0.45; cursor: not-allowed; }

/* Filter row */
.kb-filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.kb-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  flex: 1;
}

.kb-filter-chip {
  padding: 4px 10px;
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-secondary);
  background: #fff;
  border: 1px solid var(--border-default);
  border-radius: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
  white-space: nowrap;
}

.kb-filter-chip:hover { border-color: var(--text-secondary); }
.kb-filter-chip.active { background: rgba(16,185,129,0.08); border-color: var(--state-ok); color: #059669; font-weight: 600; }

.kb-sort-wrap { flex-shrink: 0; }

.kb-sort-select {
  padding: 5px 8px;
  font-size: 10.5px;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: #fff;
  font-family: inherit;
  cursor: pointer;
  outline: none;
}

.kb-result-info {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.kb-result-info strong { color: var(--text-primary); }

/* ==========================================================================
   Knowledge List
   ========================================================================== */

.kb-list-section {
  flex: 1;
  min-height: 0;
}

.kb-list-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 13px;
}

.kb-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kb-card {
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kb-card:hover { border-color: var(--state-ok); box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.kb-card.selected { border-color: var(--state-ok); background: rgba(16,185,129,0.03); }

.kb-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.kb-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.kb-card-badges {
  display: flex;
  gap: 5px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.kb-badge {
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  white-space: nowrap;
}

.kb-badge.cat { background: rgba(16,185,129,0.08); color: #059669; }
.kb-badge.risk-warn { background: rgba(245,158,11,0.1); color: #D97706; }
.kb-badge.risk-normal { background: rgba(16,185,129,0.08); color: #059669; }
.kb-badge.risk-crit { background: rgba(239,68,68,0.1); color: #DC2626; }
.kb-badge.relevance { background: rgba(59,130,246,0.08); color: #2563EB; }

.kb-card-meta {
  display: flex;
  gap: 14px;
  font-size: 10.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.kb-card-meta span { white-space: nowrap; }

.kb-card-summary {
  font-size: 11.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-card-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.kb-kw-tag {
  padding: 1px 7px;
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-input);
  border-radius: 8px;
}

.kb-card-actions {
  display: flex;
  gap: 8px;
}

.kb-card-btn {
  padding: 4px 10px;
  font-size: 10.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.kb-card-btn.detail { background: var(--bg-input); color: var(--text-secondary); }
.kb-card-btn.detail:hover { color: var(--text-primary); background: var(--bg-hover); }
.kb-card-btn.cite { background: rgba(59,130,246,0.08); color: #2563EB; }
.kb-card-btn.cite:hover { background: rgba(59,130,246,0.15); }
.kb-card-btn.report { background: rgba(16,185,129,0.08); color: #059669; }
.kb-card-btn.report:hover { background: rgba(16,185,129,0.15); }
.kb-card-btn.done { background: rgba(16,185,129,0.1); color: #059669; cursor: default; }

/* ==========================================================================
   RAG Result
   ========================================================================== */

.kb-rag-result {
  flex-shrink: 0;
  margin-top: 14px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-lg);
}

.kb-rag-result-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.kb-rag-result-header svg { color: var(--state-ok); }

.kb-rag-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-bottom: 12px;
}

.kb-rag-step {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 10px;
  background: var(--bg-input);
  color: var(--text-muted);
}

.kb-rag-step.done { background: rgba(16,185,129,0.1); color: #059669; }

.kb-rag-answer {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 10px;
}

.kb-rag-conclusion {
  padding: 10px 14px;
  background: rgba(16,185,129,0.04);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  color: #059669;
  margin-bottom: 10px;
}

.kb-rag-refs { margin-bottom: 10px; }
.kb-rag-refs-title { font-size: 11px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }

.kb-rag-ref-item {
  padding: 6px 10px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 3px;
}

.kb-rag-note {
  font-size: 10.5px;
  color: #D97706;
  padding: 8px 10px;
  background: rgba(245,158,11,0.06);
  border-radius: var(--radius-sm);
}

.kb-rag-no-result {
  padding: 20px;
  text-align: center;
  color: #D97706;
  font-size: 12px;
  font-weight: 600;
}

/* ==========================================================================
   Detail Panel
   ========================================================================== */

.kb-detail {
  width: 340px;
  min-width: 340px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-left: 1px solid var(--border-subtle);
  overflow: hidden;
}

.kb-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.kb-detail-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.kb-detail-close {
  width: 26px;
  height: 26px;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.kb-detail-close:hover { border-color: var(--state-critical); color: var(--state-critical); }

.kb-detail-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.kb-detail-body::-webkit-scrollbar { width: 4px; }
.kb-detail-body::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 2px; }

.kb-detail-field { margin-bottom: 14px; }
.kb-detail-label { font-size: 10px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 4px; }
.kb-detail-value { font-size: 12px; color: var(--text-primary); }

.kb-detail-clauses {
  padding: 12px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  line-height: 1.8;
}

.kb-detail-clauses li { margin-bottom: 4px; }

.kb-detail-warning {
  padding: 8px 12px;
  background: rgba(245,158,11,0.06);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: #D97706;
  font-weight: 600;
}

.kb-detail-cites {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   Disclaimer (fixed bottom)
   ========================================================================== */

#page-knowledge .kb-disclaimer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 36px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
  background: rgba(245,158,11,0.06);
  border-top: 1px solid rgba(245,158,11,0.12);
  font-size: 10.5px;
  color: #B45309;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
  z-index: 1;
}

#page-knowledge .kb-disclaimer svg {
  flex-shrink: 0;
  color: #D97706;
}

/* ==========================================================================
   Animations
   ========================================================================== */

.kb-fade-in { animation: kbFadeIn 0.3s ease; }

@keyframes kbFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .kb-fade-in { animation: none; }
}