/* ── Docs (RAG) tab ──────────────────────────────────────────── */
#tab-docs { flex-direction: column; width: 100%; }
.docs-header { margin-bottom: 16px; width: 100%; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.docs-header h2 { margin: 0; font-size: 20px; }
.docs-header p { color: var(--text-dim); font-size: 13px; margin: 0; }
.docs-count { font-weight: 700; color: var(--text); margin-left: 8px; }
.docs-refresh { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 4px 10px; cursor: pointer; font-size: 13px; color: var(--text-dim); transition: all 0.15s; }
.docs-refresh:hover { border-color: var(--accent, #3b82f6); color: var(--text); }
.docs-upload-btn { background: var(--accent, #3b82f6); color: #fff; border: none; border-radius: 6px; padding: 5px 14px; cursor: pointer; font-size: 13px; font-weight: 600; transition: opacity 0.15s; margin-left: auto; }
.docs-upload-btn:hover { opacity: 0.85; }
.docs-version { display: inline-block; margin-left: 10px; padding: 2px 8px; border-radius: 10px; font-size: 10px; font-weight: 700; background: rgba(139,92,246,0.12); color: #7c3aed; letter-spacing: 0.3px; vertical-align: middle; }
[data-theme="dark"] .docs-version { background: rgba(139,92,246,0.2); color: #a78bfa; }

/* Toolbar: search */
.docs-toolbar { display: flex; gap: 8px; margin-bottom: 14px; width: 100%; }
.docs-search-wrap { display: flex; flex: 1; gap: 0; }
.docs-search-wrap input { flex: 1; padding: 7px 12px; border: 1px solid var(--border); border-radius: 6px 0 0 6px; font-size: 13px; background: var(--bg-input, var(--bg)); color: var(--text); outline: none; }
.docs-search-wrap input:focus { border-color: var(--accent, #3b82f6); }
.docs-search-btn { padding: 7px 14px; border: 1px solid var(--border); border-left: none; border-radius: 0 6px 6px 0; background: var(--bg-card, var(--bg)); cursor: pointer; font-size: 13px; color: var(--text-dim); transition: all 0.15s; }
.docs-search-btn:hover { background: var(--accent, #3b82f6); color: #fff; border-color: var(--accent, #3b82f6); }
.docs-back-btn { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 5px 12px; cursor: pointer; font-size: 13px; color: var(--text-dim); display: none; }
.docs-back-btn:hover { border-color: var(--accent); color: var(--text); }

/* Filters */
#docs-filters { width: 100%; display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 10px 14px; background: var(--card-bg, var(--bg)); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 14px; box-sizing: border-box; }
.docs-filter-row { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 6px; }
#docs-filters .docs-filter-row:nth-child(1) { background: rgba(59,130,246,0.07); }
#docs-filters .docs-filter-row:nth-child(2) { background: rgba(34,197,94,0.07); }
[data-theme="dark"] #docs-filters .docs-filter-row:nth-child(1) { background: rgba(59,130,246,0.12); }
[data-theme="dark"] #docs-filters .docs-filter-row:nth-child(2) { background: rgba(34,197,94,0.12); }
.docs-filter-row label { font-size: 11px; font-weight: 700; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; }
.docs-pills { display: inline-flex; gap: 3px; flex-wrap: wrap; }
.docs-pills .filter-item { font-size: 12px; padding: 3px 10px; border-radius: 12px; border: 1px solid var(--border); background: transparent; color: var(--text-dim); cursor: pointer; transition: all 0.15s; white-space: nowrap; }
.docs-pills .filter-item:hover { border-color: var(--accent, #3b82f6); color: var(--text); }
.docs-pills .filter-item.active { background: var(--accent, #3b82f6); color: #fff; border-color: var(--accent, #3b82f6); }

/* Table */
#docs-list { width: 100%; }
.docs-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; width: 100%; }
.docs-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.docs-table th { text-align: left; padding: 10px 12px; background: var(--card-bg, var(--bg)); border-bottom: 2px solid var(--border); font-size: 11px; font-weight: 700; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.6px; white-space: nowrap; }
.docs-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.docs-table tbody tr:last-child td { border-bottom: none; }
.doc-row { transition: background 0.15s; }
.doc-row:nth-child(even) { background: rgba(0,0,0,0.02); }
.doc-row:hover { background: rgba(59,130,246,0.06); }
[data-theme="dark"] .doc-row:nth-child(even) { background: rgba(255,255,255,0.03); }
.doc-name { font-weight: 500; max-width: 30vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-chunks { font-variant-numeric: tabular-nums; text-align: center; }
.doc-size { font-variant-numeric: tabular-nums; color: var(--text-dim); font-size: 12px; }
.doc-date { white-space: nowrap; font-size: 12px; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* Status badges */
.doc-status { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.3px; }
.doc-status-ready { background: #dcfce7; color: #15803d; }
.doc-status-error { background: #fee2e2; color: #b91c1c; }
.doc-status-indexing { background: #dbeafe; color: #1d4ed8; }
.doc-status-partial { background: #fef9c3; color: #a16207; }
[data-theme="dark"] .doc-status-ready { background: rgba(34,197,94,0.18); color: #4ade80; }
[data-theme="dark"] .doc-status-error { background: rgba(239,68,68,0.18); color: #f87171; }
[data-theme="dark"] .doc-status-indexing { background: rgba(59,130,246,0.18); color: #60a5fa; }
[data-theme="dark"] .doc-status-partial { background: rgba(234,179,8,0.18); color: #facc15; }

/* Checkbox column */
.doc-check-col { width: 32px; text-align: center; padding-left: 8px !important; padding-right: 0 !important; }
.doc-select, .doc-select-all { width: 15px; height: 15px; cursor: pointer; accent-color: var(--accent, #3b82f6); }

/* Bulk action bar */
.docs-bulk-bar { display: none; align-items: center; gap: 12px; padding: 10px 16px; margin-bottom: 10px; background: rgba(59,130,246,0.08); border: 1px solid rgba(59,130,246,0.25); border-radius: 8px; font-size: 13px; font-weight: 600; color: var(--text); animation: docs-bulk-slide 0.2s ease; }
[data-theme="dark"] .docs-bulk-bar { background: rgba(59,130,246,0.14); border-color: rgba(59,130,246,0.3); }
@keyframes docs-bulk-slide { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
#docs-bulk-count { flex: 1; }
.docs-bulk-delete { background: #ef4444; color: #fff; border: none; border-radius: 6px; padding: 5px 14px; cursor: pointer; font-size: 12px; font-weight: 600; transition: opacity 0.15s; }
.docs-bulk-delete:hover { opacity: 0.85; }
.docs-bulk-clear { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 5px 12px; cursor: pointer; font-size: 12px; color: var(--text-dim); }
.docs-bulk-clear:hover { border-color: var(--text); color: var(--text); }

/* Delete button */
.doc-actions { text-align: center; width: 40px; }
.doc-delete-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 4px 8px; border-radius: 4px; transition: all 0.15s; }
.doc-delete-btn:hover { background: rgba(239,68,68,0.1); color: var(--red, #dc3545); }

/* Search results */
.docs-search-results { display: flex; flex-direction: column; gap: 10px; }
.docs-result-card { padding: 14px 18px; border: 1px solid var(--border); border-radius: 8px; background: var(--card-bg, var(--bg)); transition: border-color 0.15s; }
.docs-result-card:hover { border-color: var(--accent, #3b82f6); }
.docs-result-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.docs-result-score { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 700; background: var(--accent, #3b82f6); color: #fff; }
.docs-result-source { font-weight: 600; font-size: 13px; }
.docs-result-chunk { font-size: 11px; color: var(--text-muted); background: var(--border); padding: 2px 7px; border-radius: 4px; }
.docs-result-text { font-size: 13px; line-height: 1.6; color: var(--text-dim); }
.docs-result-meta { margin-top: 8px; }

/* Upload modal */
.docs-modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 9999; }
.docs-modal-box { background: var(--bg-card, #fff); border-radius: 12px; padding: 24px; width: 90%; max-width: 540px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.docs-modal-box h3 { margin: 0 0 16px; font-size: 18px; }
.docs-upload-form { display: flex; flex-direction: column; gap: 12px; }
.docs-field { display: flex; flex-direction: column; gap: 4px; }
.docs-field label { font-size: 12px; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.3px; }
.docs-field input, .docs-field textarea { padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; background: var(--bg-input, var(--bg)); color: var(--text); font-family: inherit; outline: none; resize: vertical; }
.docs-field input:focus, .docs-field textarea:focus { border-color: var(--accent, #3b82f6); }
.docs-upload-hint { font-size: 11px; color: var(--text-muted); margin: 0; }
.docs-modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 8px; }
.docs-modal-cancel { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 7px 16px; cursor: pointer; font-size: 13px; color: var(--text-dim); }
.docs-modal-cancel:hover { border-color: var(--text); color: var(--text); }
.docs-modal-submit { background: var(--accent, #3b82f6); color: #fff; border: none; border-radius: 6px; padding: 7px 20px; cursor: pointer; font-size: 13px; font-weight: 600; }
.docs-modal-submit:hover { opacity: 0.85; }
.docs-modal-submit:disabled { opacity: 0.5; cursor: not-allowed; }

/* Drop zone */
.docs-drop-zone { border: 2px dashed var(--border); border-radius: 10px; padding: 32px 20px; text-align: center; cursor: pointer; transition: all 0.2s; margin-bottom: 16px; }
.docs-drop-zone:hover, .docs-drop-active { border-color: var(--accent, #3b82f6); background: rgba(59,130,246,0.04); }
[data-theme="dark"] .docs-drop-zone:hover, [data-theme="dark"] .docs-drop-active { background: rgba(59,130,246,0.08); }
.docs-drop-icon { font-size: 32px; margin-bottom: 8px; }
.docs-drop-text { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.docs-drop-hint { font-size: 11px; color: var(--text-muted); }

/* File list */
.docs-file-list { margin-bottom: 14px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.docs-file-list-header { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-dim); padding: 8px 12px; background: var(--card-bg, var(--bg)); border-bottom: 1px solid var(--border); }
.docs-file-row { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-bottom: 1px solid var(--border); font-size: 13px; transition: background 0.3s; }
.docs-file-row:last-child { border-bottom: none; }
.docs-file-row.uploading { background: rgba(59,130,246,0.06); }
.docs-file-row.processing { background: rgba(234,179,8,0.06); animation: docs-pulse 1.5s ease-in-out infinite; }
.docs-file-row.done { background: rgba(34,197,94,0.06); }
.docs-file-row.error { background: rgba(239,68,68,0.06); }
.docs-file-icon { width: 18px; text-align: center; flex-shrink: 0; font-weight: 700; }
.docs-file-icon.spinning { animation: docs-spin 1s linear infinite; }
.docs-file-ok { color: #22c55e; }
.docs-file-err { color: #ef4444; }
.docs-file-uploading { color: var(--accent, #3b82f6); }
.docs-file-processing { color: #eab308; }
.docs-file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.docs-file-size { color: var(--text-dim); font-size: 12px; font-variant-numeric: tabular-nums; flex-shrink: 0; }
.docs-file-status { color: var(--text-dim); font-size: 12px; flex-shrink: 0; min-width: 90px; text-align: right; }
.docs-file-status.uploading { color: var(--accent, #3b82f6); font-weight: 600; }
.docs-file-status.processing { color: #eab308; font-weight: 600; }
.docs-file-status.done { color: #22c55e; font-weight: 600; }
.docs-file-status.error { color: #ef4444; font-weight: 600; }
.docs-file-remove { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 12px; padding: 2px 6px; border-radius: 4px; flex-shrink: 0; }
.docs-file-remove:hover { background: rgba(239,68,68,0.1); color: var(--red, #dc3545); }
@keyframes docs-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }
@keyframes docs-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Chunk mode toggle */
.docs-chunk-mode { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 8px 0 4px; }
.docs-toggle-label { position: relative; display: inline-block; width: 38px; height: 20px; cursor: pointer; flex-shrink: 0; }
.docs-toggle-label input { opacity: 0; width: 0; height: 0; }
.docs-toggle-slider { position: absolute; inset: 0; background: var(--border); border-radius: 20px; transition: background 0.25s; }
.docs-toggle-slider::before { content: ''; position: absolute; left: 2px; top: 2px; width: 16px; height: 16px; background: #fff; border-radius: 50%; transition: transform 0.25s; box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
.docs-toggle-label input:checked + .docs-toggle-slider { background: var(--accent, #3b82f6); }
.docs-toggle-label input:checked + .docs-toggle-slider::before { transform: translateX(18px); }
.docs-toggle-text { font-size: 13px; font-weight: 600; color: var(--text); }
.docs-toggle-hint { font-size: 11px; color: var(--text-muted); width: 100%; margin-top: -2px; padding-left: 48px; }

/* Paste toggle */
.docs-paste-toggle { background: none; border: none; color: var(--text-muted); font-size: 12px; cursor: pointer; padding: 8px 0; width: 100%; text-align: center; transition: color 0.15s; }
.docs-paste-toggle:hover { color: var(--text-dim); }

/* Progress bar */
.docs-upload-progress { margin-top: 12px; padding: 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--card-bg, var(--bg)); }
.docs-progress-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.docs-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent, #3b82f6), #60a5fa); border-radius: 4px; width: 0; transition: width 0.4s ease; }
.docs-progress-fill.active { background: linear-gradient(90deg, var(--accent, #3b82f6), #60a5fa, var(--accent, #3b82f6)); background-size: 200% 100%; animation: docs-progress-shine 1.5s linear infinite; }
.docs-progress-text { font-size: 13px; color: var(--text); margin-top: 8px; text-align: center; font-weight: 600; }
.docs-progress-stage { font-size: 11px; color: var(--text-dim); margin-top: 4px; text-align: center; }
@keyframes docs-progress-shine { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Delete overlay */
.doc-row.deleting { opacity: 0.5; pointer-events: none; }
.doc-row.deleting td:first-child::before { content: ''; display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent, #3b82f6); border-radius: 50%; animation: docs-spin 0.6s linear infinite; margin-right: 8px; vertical-align: middle; }

/* Expanded doc detail */
.doc-expanded { background: rgba(59,130,246,0.08) !important; }
.doc-detail-row { background: var(--card-bg, var(--bg)); }
.doc-detail-cell { padding: 16px 20px !important; border-bottom: 2px solid var(--accent, #3b82f6) !important; }
.doc-detail-loading { color: var(--text-dim); font-size: 13px; padding: 12px 0; }
.doc-detail-error { color: var(--red, #dc3545); font-size: 13px; padding: 12px 0; }
.doc-detail-empty { color: var(--text-muted); font-size: 13px; padding: 12px 0; }

.doc-detail-meta { display: flex; flex-wrap: wrap; gap: 12px 24px; padding: 12px 16px; background: rgba(59,130,246,0.04); border-radius: 8px; margin-bottom: 16px; }
[data-theme="dark"] .doc-detail-meta { background: rgba(59,130,246,0.08); }
.doc-detail-meta-item { display: flex; flex-direction: column; gap: 2px; min-width: 120px; }
.doc-detail-label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); }
.doc-detail-value { font-size: 13px; color: var(--text); word-break: break-all; }

.doc-detail-chunks-header { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-dim); margin-bottom: 10px; }
.doc-detail-chunks { display: flex; flex-direction: column; gap: 8px; max-height: 400px; overflow-y: auto; }
.doc-chunk-card { padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); transition: border-color 0.15s; }
.doc-chunk-card:hover { border-color: var(--accent, #3b82f6); }
.doc-chunk-header { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.doc-chunk-index { font-size: 11px; font-weight: 700; color: var(--accent, #3b82f6); background: rgba(59,130,246,0.1); padding: 2px 8px; border-radius: 4px; }
[data-theme="dark"] .doc-chunk-index { background: rgba(59,130,246,0.18); }
.doc-chunk-len { font-size: 11px; color: var(--text-muted); }
.doc-chunk-text { font-size: 12px; line-height: 1.6; color: var(--text-dim); white-space: pre-wrap; word-break: break-word; }

/* Chunk detail modal */
.chunk-modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.55); display: flex; align-items: center; justify-content: center; z-index: 10000; padding: 16px; box-sizing: border-box; }
.chunk-modal-box { background: var(--bg-card, #fff); border-radius: 14px; width: 100%; max-width: 720px; max-height: 85vh; display: flex; flex-direction: column; box-shadow: 0 24px 80px rgba(0,0,0,0.35); overflow: hidden; }
.chunk-modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.chunk-modal-title-wrap { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; min-width: 0; }
.chunk-modal-title { font-weight: 600; font-size: 14px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 300px; }
.chunk-modal-chars { font-size: 11px; color: var(--text-muted); background: var(--border); padding: 2px 8px; border-radius: 4px; white-space: nowrap; }
.chunk-modal-close { background: none; border: none; font-size: 18px; color: var(--text-muted); cursor: pointer; padding: 4px 8px; border-radius: 6px; transition: all 0.15s; flex-shrink: 0; }
.chunk-modal-close:hover { background: rgba(239,68,68,0.1); color: var(--red, #dc3545); }
.chunk-modal-meta { padding: 12px 20px; background: rgba(59,130,246,0.04); border-bottom: 1px solid var(--border); font-size: 12px; line-height: 1.6; color: var(--text-dim); flex-shrink: 0; }
[data-theme="dark"] .chunk-modal-meta { background: rgba(59,130,246,0.08); }
.chunk-modal-meta div { margin-bottom: 2px; }
.chunk-modal-meta strong { color: var(--text); }
.chunk-modal-body { flex: 1; overflow-y: auto; padding: 20px; min-height: 0; }
.chunk-modal-text { font-size: 13px; line-height: 1.7; color: var(--text); white-space: pre-wrap; word-break: break-word; margin: 0; font-family: inherit; background: none; border: none; }
.chunk-modal-actions { display: flex; justify-content: flex-end; padding: 12px 20px; border-top: 1px solid var(--border); flex-shrink: 0; }
.chunk-modal-copy { background: var(--accent, #3b82f6); color: #fff; border: none; border-radius: 6px; padding: 6px 16px; cursor: pointer; font-size: 12px; font-weight: 600; transition: opacity 0.15s; }
.chunk-modal-copy:hover { opacity: 0.85; }

/* Mobile */
@media (max-width: 768px) {
  .docs-header { flex-direction: column; gap: 4px; }
  .docs-upload-btn { margin-left: 0; align-self: flex-start; }
  .docs-toolbar { flex-wrap: wrap; }
  .docs-table { font-size: 12px; }
  .docs-table th, .docs-table td { padding: 8px 6px; }
  .doc-name { max-width: 40vw; font-size: 12px; }
  #docs-filters { flex-direction: column; gap: 4px; padding: 8px 10px; }
  .docs-modal-box { width: 95%; padding: 16px; }
  .doc-detail-meta { gap: 8px 16px; padding: 10px 12px; }
  .doc-detail-meta-item { min-width: 100px; }
  .doc-detail-chunks { max-height: 300px; }
  .doc-detail-cell { padding: 12px !important; }
  .chunk-modal-overlay { padding: 8px; }
  .chunk-modal-box { max-height: 92vh; border-radius: 10px; }
  .chunk-modal-header { padding: 12px 14px; }
  .chunk-modal-title { max-width: 180px; font-size: 13px; }
  .chunk-modal-body { padding: 14px; }
  .chunk-modal-text { font-size: 12px; line-height: 1.6; }
  .chunk-modal-meta { padding: 10px 14px; font-size: 11px; }
  .chunk-modal-actions { padding: 10px 14px; }
}