:root{--bg: #f5f6f8;--surface: #ffffff;--border: #e2e5ea;--text: #1c2430;--muted: #6b7480;--primary: #2563eb;--primary-hover: #1d4ed8;--danger: #dc2626;--ok: #16a34a;--warn: #d97706;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px}.layout{display:flex;flex-direction:column;min-height:100vh}.topbar{display:flex;align-items:center;gap:24px;padding:0 24px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.brand{font-weight:700;font-size:17px;letter-spacing:.5px}.nav{display:flex;gap:4px;flex:1}.nav a{padding:8px 14px;border-radius:8px;color:var(--muted);text-decoration:none;font-weight:500}.nav a:hover{background:var(--bg);color:var(--text)}.nav a.active{background:#eff6ff;color:var(--primary)}.userbox{display:flex;align-items:center;gap:12px}.username{color:var(--muted);font-weight:500}.content{flex:1;width:100%;max-width:1100px;margin:0 auto;padding:24px}.center-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;color:var(--muted)}.muted{color:var(--muted);font-size:13px}.center{text-align:center}h2{margin:0 0 16px}h3{margin:0 0 8px;font-size:15px}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);padding:9px 16px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer}.btn:hover{background:var(--bg)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{color:var(--danger);border-color:#fecaca}.btn-danger:hover{background:#fef2f2}.btn-ghost{border:none;background:none;color:var(--muted)}.btn-ghost:hover{color:var(--text);background:var(--bg)}.btn-link{border:none;background:none;color:var(--primary);text-decoration:underline;padding:8px 0}.btn-small{padding:5px 10px;font-size:12px}.auth-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px}.auth-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;display:flex;flex-direction:column;gap:14px}.auth-card h1{margin:0;font-size:22px}.auth-card p{margin:0 0 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var(--border);border-radius:var(--radius);padding:12px}.sessions-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.sessions-title{font-weight:600}.sessions-new{padding:4px 10px;font-size:13px}.sessions-header-actions{display:flex;align-items:center;gap:6px}.sidebar-toggle-inner{border:1px solid var(--border);background:var(--bg);color:var(--muted);border-radius:6px;width:24px;height:24px;line-height:1;font-size:15px;cursor:pointer;padding:0}.sidebar-toggle-inner:hover{color:var(--primary);border-color:var(--primary)}.sidebar-open-tab{flex-shrink:0;width:22px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--muted);font-size:16px;cursor:pointer;padding:0}.sidebar-open-tab:hover{color:var(--primary);border-color:var(--primary)}.sessions-search{display:flex;gap:6px}.sessions-search input{flex:1;min-width:0;padding:6px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:13px}.sessions-search .btn{padding:6px 10px;font-size:13px}.sessions-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px;min-height:0}.sessions-subheader{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);padding:2px 2px 0}.sessions-clear{border:none;background:none;color:var(--muted);cursor:pointer;font-size:14px;padding:0 4px}.sessions-clear:hover{color:var(--text)}.sessions-empty{color:var(--muted);font-size:13px;text-align:center;padding:16px 4px}.session-item{display:flex;align-items:flex-start;gap:8px;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);cursor:pointer}.session-item:hover{border-color:var(--primary)}.session-item.active{border-color:var(--primary);background:var(--surface);outline:1px solid var(--primary)}.session-item-body{min-width:0;flex:1}.session-item-title{font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-item-snippet{font-size:12px;color:var(--muted);margin-top:3px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.session-item-meta{font-size:11px;color:var(--muted);margin-top:3px}.session-check{margin-top:2px;flex-shrink:0}.sessions-footer{display:flex;gap:8px}.sessions-footer .btn{flex:1;font-size:13px;padding:6px 8px;white-space:nowrap}.sessions-delete-toggle{color:var(--danger)}.sessions-search-results .session-item-snippet{-webkit-line-clamp:3}.chat-main{flex:1;min-width:0;display:flex;flex-direction:column}.chat-page.with-preview .chat-main{padding-right:8px}.chat-messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:8px 4px}.chat-empty{margin:auto;color:var(--muted);text-align:center;max-width:420px}.bubble{max-width:78%;padding:12px 16px;border-radius:14px;white-space:pre-wrap;word-break:break-word;line-height:1.55}.bubble-user{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}.bubble-assistant{align-self:flex-start;background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}.bubble-error{background:#fef2f2;color:#b91c1c}.bubble-text:empty:after{content:"…";color:var(--muted)}.markdown-body{white-space:normal}.markdown-body>:first-child{margin-top:0}.markdown-body>:last-child{margin-bottom:0}.markdown-body p{margin:8px 0}.markdown-body a{color:var(--primary);text-decoration:underline}.markdown-body ul,.markdown-body ol{margin:8px 0;padding-left:22px}.markdown-body li{margin:4px 0}.markdown-body code{background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:1px 5px;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.markdown-body pre{background:var(--bg);border:1px solid 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var(--border);border-radius:var(--radius);display:flex;flex-direction:column;overflow:hidden}.preview-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--bg)}.preview-title{font-weight:600;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.preview-chunk{color:var(--muted);font-weight:400;font-size:12px}.preview-mode-switch{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}.preview-mode-btn{border:none;background:var(--surface);padding:4px 10px;font-size:12px;cursor:pointer;color:var(--muted)}.preview-mode-btn:hover{background:var(--bg);color:var(--text)}.preview-mode-btn-active{background:#eff6ff;color:var(--primary);font-weight:600}.chunk-text-view{height:100%;margin:0;white-space:pre-wrap;word-break:break-word;font-size:13px;line-height:1.6;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px;overflow:auto}.preview-body::-webkit-scrollbar,.chunk-text-view::-webkit-scrollbar,.xlsx-sheet::-webkit-scrollbar{width:10px;height:10px}.preview-body::-webkit-scrollbar-track,.chunk-text-view::-webkit-scrollbar-track,.xlsx-sheet::-webkit-scrollbar-track{background:var(--bg);border-radius:5px}.preview-body::-webkit-scrollbar-thumb,.chunk-text-view::-webkit-scrollbar-thumb,.xlsx-sheet::-webkit-scrollbar-thumb{background:#c3c9d4;border-radius:5px}.preview-body::-webkit-scrollbar-thumb:hover,.chunk-text-view::-webkit-scrollbar-thumb:hover{background:#a8b0bf}.preview-toolbar{display:flex;align-items:center;gap:6px;padding:6px 10px;border-bottom:1px solid var(--border);background:var(--bg);flex-wrap:wrap}.preview-frag-toolbar{padding:4px 10px}.preview-goto-input{width:56px;padding:3px 8px;font-size:12px;text-align:center}.preview-zoom-value{font-size:12px;color:var(--muted);min-width:44px;text-align:center}.toolbar-spacer{flex:1}.preview-body{flex:1;overflow:auto;padding:12px}.preview-loading,.preview-error{color:var(--muted);text-align:center;padding:24px 8px;font-size:14px}.preview-error{color:var(--danger)}.preview-notice{margin:0 auto 12px;padding:10px 14px;max-width:640px;background:#fef9c3;color:#713f12;border:1px solid #fde047;border-radius:6px;font-size:13px;line-height:1.4;text-align:center}.pdf-frame{width:100%;height:100%;min-height:400px;border:none;border-radius:6px}.pdf-container{display:block}.pdf-page{position:relative;margin:0 auto 12px;box-shadow:0 2px 8px #0000001f;border-radius:2px}.pdf-page canvas{display:block}.pdf-highlight{position:absolute;background:#facc1573;border-radius:2px;pointer-events:none}.chunk-highlight{outline:2px solid var(--warn);background:#fef9c3!important;border-radius:2px}.text-view mark{background:#fef08a;border-radius:2px;padding:0 1px}.docx-container{width:100%}.docx-container .docx-wrapper{background:var(--bg);padding:12px 0;display:block}.docx-container .docx-wrapper>section.docx{box-shadow:0 2px 8px #0000001f;margin:0 auto 16px;width:100%;max-width:100%}.image-view{display:flex;justify-content:center}.image-view img{max-width:100%;border-radius:6px;border:1px solid var(--border)}.text-view{white-space:pre-wrap;word-break:break-word;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;margin:0}.xlsx-view{display:flex;flex-direction:column;gap:10px}.xlsx-tabs{display:flex;flex-wrap:wrap;gap:6px}.xlsx-tab{border:1px solid var(--border);background:var(--surface);border-radius:6px;padding:4px 10px;font-size:12px;cursor:pointer}.xlsx-tab-active{background:#eff6ff;border-color:var(--primary);color:var(--primary);font-weight:600}.xlsx-sheet{overflow-x:auto}.xlsx-sheet table{border-collapse:collapse;width:100%}.xlsx-sheet td,.xlsx-sheet th{border:1px solid var(--border);padding:4px 8px;font-size:13px;text-align:left;white-space:nowrap}.chat-input-row{display:flex;gap:12px;align-items:flex-end;margin-top:16px}.chat-input-row textarea{flex:1;resize:none}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);background:var(--surface);padding:28px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone-active{border-color:var(--primary);background:#f8faff}.dropzone-title{font-weight:600;margin-bottom:6px}.scope-row{margin-top:14px;display:flex;gap:20px;justify-content:center}.radio{flex-direction:row;align-items:center;gap:6px;cursor:pointer;color:var(--text)}.checkbox{flex-direction:row;align-items:center;gap:8px;cursor:pointer;color:var(--text)}.table{width:100%;border-collapse:collapse;margin-top:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.table th,.table td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);font-size:14px;vertical-align:top}.table th{background:var(--bg);font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}.table tr:last-child td{border-bottom:none}.badge{display:inline-block;border-radius:6px;padding:3px 8px;font-size:12px;font-weight:500}.badge-shared{background:#eff6ff;color:var(--primary)}.badge-personal{background:#f5f3ff;color:#7c3aed}.badge-indexed{background:#f0fdf4;color:#15803d}.badge-queued,.badge-parsing{background:#fffbeb;color:#b45309}.badge-failed{background:#fef2f2;color:#b91c1c}.error-text{color:var(--danger);font-size:12px;margin-top:4px}.row-actions{display:flex;gap:8px;flex-wrap:wrap}.settings-page{max-width:640px}.settings-form{display:flex;flex-direction:column;gap:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.test-results{margin-top:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 24px}.test-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}.test-row:last-child{border-bottom:none}.test-ok span:last-child{color:var(--ok);font-weight:600}.test-fail span:last-child{color:var(--danger)}