:root {
  --knowledge-border: rgba(0,0,0,0.08);
}

[data-theme="dark"] {
  --knowledge-border: rgba(255,255,255,0.08);
}

.knowledge-wrap {
  padding: 25px;
  max-width: 980px;
  margin: 0 auto;
  width: 100%;
}

.knowledge-folder-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.knowledge-back {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--knowledge-border);
  background: var(--color-card-bg, #ffffff);
  color: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

[data-theme="dark"] .knowledge-back {
  background: #0b1220;
}

.knowledge-back svg {
  width: 18px;
  height: 18px;
}

.knowledge-folder-title {
  min-width: 0;
  flex: 1;
}

.knowledge-folder-title h1 {
  margin: 0 0 4px 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text, #111827);
}

@media (max-width: 768px) {
  .knowledge-folder-title h1 {
    font-size: 22px;
  }
}

.knowledge-folder-sub {
  margin: 6px 0;
  font-size: 13px;
  opacity: 0.75;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}


.knowledge-btn-danger {
  border-color: rgba(239, 68, 68, 0.35);
  color: #b91c1c;
}

[data-theme="dark"] .knowledge-btn-danger {
  border-color: rgba(239, 68, 68, 0.35);
  color: #fecaca;
}

.knowledge-files {
  display: flex;
  flex-direction: column;
}

.knowledge-file-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 3px 4px;
  border-radius: 14px;
  border: 1px solid transparent;
}

.knowledge-file-row:hover {
  border-color: var(--knowledge-border);
  background: rgba(0,0,0,0.03);
}

[data-theme="dark"] .knowledge-file-row:hover {
  background: rgba(255,255,255,0.04);
}

.knowledge-file-left {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.knowledge-file-name {
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.knowledge-file-meta {
  font-size: 12px;
  opacity: 0.75;
  display: flex;
  gap: 10px;
}

.knowledge-file-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.knowledge-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
}

.knowledge-title h1 {
  margin: 0 0 4px 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text, #111827);
}

.knowledge-subtitle {
  margin-top: 6px;
  font-size: 14px;
  color: var(--color-text-muted, #6b7280);
}

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

.knowledge-btn {
  appearance: none;
  border: 1px solid var(--knowledge-border);
  background: var(--color-card-bg, #f7f7f7);
  color: var(--color-text, #111827);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}

[data-theme="dark"] .knowledge-btn {
  background: #0b1220;
  color: #e5e7eb;
}

.knowledge-toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.knowledge-search {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  border: 1px solid var(--knowledge-border);
  background: var(--color-card-bg, #ffffff);
  border-radius: 14px;
  padding: 10px 12px;
}

[data-theme="dark"] .knowledge-search {
  background: #0b1220;
}

.knowledge-search svg {
  width: 16px;
  height: 16px;
  opacity: 0.65;
}

.knowledge-search input {
  border: 0;
  outline: none;
  background: transparent;
  width: 100%;
  color: inherit;
  font-size: 14px;
}

.knowledge-card {
  position: relative;
  border: 1px solid var(--knowledge-border);
  border-radius: 18px;
  background: var(--color-card-bg, #ffffff);
  padding: 8px;
}

.knowledge-card-controls {
  position: absolute;
  top: 8px;
  right: 30px;
  display: flex;
  gap: 4px;
  z-index: 10;
}

.k-ctrl-btn {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--knowledge-border);
  border-radius: 8px;
  background: var(--color-card-bg, #ffffff);
  color: var(--color-text-muted, #6b7280);
  cursor: pointer;
  padding: 6px;
  transition: all 0.2s;
}

[data-theme="dark"] .k-ctrl-btn {
  background: #1f2937;
  color: #e5e7eb;
}

.k-ctrl-btn:hover {
  background: var(--color-bg-hover, #f3f4f6);
  color: var(--color-primary, #2563eb);
}

[data-theme="dark"] .k-ctrl-btn:hover {
  background: #374151;
  color: #60a5fa;
}

.k-ctrl-btn svg {
  width: 16px;
  height: 16px;
}

[data-theme="dark"] .knowledge-card {
  background: #0b1220;
}

.knowledge-loading {
  padding: 10px;
  font-size: 13px;
  opacity: 0.8;
}

.knowledge-empty {
  padding: 20px 12px;
  text-align: center;
}

.knowledge-empty-title {
  font-weight: 700;
}

.knowledge-empty-subtitle {
  margin-top: 6px;
  font-size: 13px;
  opacity: 0.75;
}

.knowledge-empty .knowledge-btn {
  margin-top: 12px;
}

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

.knowledge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px;
  border-radius: 14px;
  cursor: pointer;
  border: 1px solid transparent;
}

.knowledge-row:hover {
  border-color: var(--knowledge-border);
  background: rgba(0,0,0,0.03);
}

[data-theme="dark"] .knowledge-row:hover {
  background: rgba(255,255,255,0.04);
}

.knowledge-row-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.knowledge-row-name {
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.knowledge-row-desc {
  font-size: 12px;
  opacity: 0.75;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.knowledge-row-meta {
  display: flex;
  align-items: center;
  gap: 15px;
  flex-shrink: 0;
  font-size: 12px;
  opacity: 0.75;
  width: 320px;
}

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

.knowledge-meta-count {
  width: 80px;
}

.knowledge-meta-size {
  width: 80px;
}

.knowledge-meta-time {
  width: 100px;
  text-align: right;
}

.knowledge-row-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.knowledge-icon-btn {
  appearance: none;
  border: 1px solid var(--knowledge-border);
  background: transparent;
  color: inherit;
  border-radius: 10px;
  padding: 6px 8px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
}

.hidden { display: none !important; }

.knowledge-text-content {
  padding: 12px;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 70vh;
  overflow-y: auto;
  font-family: var(--font-mono, monospace);
  background: var(--color-bg, #ffffff);
  border-radius: 12px;
}

[data-theme="dark"] .knowledge-text-content {
  background: #0b1220;
}

@media (max-width: 768px) {
  .knowledge-wrap {
    padding: 30px 15px;
    box-sizing: border-box;
    overflow-x: hidden;
  }

  .knowledge-back {
    position: fixed;
    top: 10px;
    right: 10px;
    width: 44px;
    height: 44px;
    z-index: 5001;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }

  #knowledge-text-view {
    margin-top: 30px;
  }
}

/* Selection Toolbar */
.selection-toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-panel, #ffffff);
  border-top: 1px solid var(--color-border, #e5e7eb);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
  z-index: 2000;
  padding: 12px 20px;
  transform: translateY(0);
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.selection-toolbar.hidden {
  transform: translateY(100%);
  pointer-events: none;
}

.selection-toolbar-content {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 1200px;
  width: 100%;
}

.selection-count {
  font-weight: 600;
  color: var(--color-text, #111827);
  flex: 1;
}

.selection-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.selection-toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border, #e5e7eb);
  background: var(--color-bg-panel, #fff);
  color: var(--color-text, #374151);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.selection-toolbar-btn:hover {
  background: rgba(0,0,0,0.03);
}

.selection-toolbar-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.selection-toolbar-btn.text-btn {
  border: none;
  background: transparent;
  padding: 10px 12px;
}

.selection-toolbar-btn.danger {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
}

.selection-toolbar-btn.danger:hover:not(:disabled) {
  background: #b91c1c;
}

[data-theme='dark'] .selection-toolbar {
  background: #1f2937;
  border-color: #374151;
}

[data-theme='dark'] .selection-count {
  color: #e5e7eb;
}

[data-theme='dark'] .selection-toolbar-btn {
  background: #1f2937;
  border-color: #374151;
  color: #e5e7eb;
}

[data-theme='dark'] .selection-toolbar-btn:hover {
  background: rgba(255,255,255,0.06);
}

@media (max-width: 768px) {
  .selection-toolbar-btn span {
    display: none;
  }
  .selection-toolbar-btn {
    padding: 10px;
  }
  .selection-toolbar-content {
    gap: 8px;
  }
}