:root{--bg: #0f1115;--fg: #e6e6e6;--muted: #9aa4af;--panel: #171a21;--accent: #3b82f6;--border: #2a2f3a}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;background:var(--bg);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji"}.app{height:100%;display:flex;flex-direction:column;overflow:hidden}.app-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.app-main>*{flex:1;min-height:0}a{color:var(--fg);text-decoration:none;margin-right:12px}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--panel);position:sticky;top:0}.app-header h1{font-size:18px;margin:0}.app-main{padding:0;height:calc(100% - 52px)}.settings label{font-size:12px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}.browse{display:grid;grid-template-columns:320px 1fr 320px;height:100%;overflow:hidden}.left,.center,.right{display:flex;flex-direction:column;min-height:0}.left{border-right:1px solid var(--border);background:var(--panel);overflow:hidden}.left-body{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}.center{overflow:hidden}.center-body{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}.center-empty{flex:1}.right{border-left:1px solid var(--border);background:var(--panel);overflow:hidden}.right-body{flex:1;min-height:0;overflow-y:auto}.searchbar{display:flex;gap:8px;padding:8px;border-bottom:1px solid var(--border);flex-shrink:0}input,button{background:#0c0f14;color:var(--fg);border:1px solid var(--border);padding:6px 8px;border-radius:6px}button{cursor:pointer}label{display:block;font-size:12px;color:var(--muted);margin:8px 0 4px}.left-tabs{display:flex;gap:8px;padding:8px;border-bottom:1px solid var(--border);flex-shrink:0}.left-tabs button{flex:1;font-size:12px;padding:6px 8px;border-radius:20px;background:transparent;border:1px solid var(--border);color:var(--muted)}.left-tabs button.active{background:var(--accent);border-color:var(--accent);color:#fff}.left-tabs button:disabled{opacity:.5;cursor:not-allowed}.left-panel{flex:1;min-height:0;overflow-y:auto}.left-placeholder{padding:16px;color:var(--muted);font-size:13px}.conv-list ul{list-style:none;margin:0;padding:0}.conv-list li{padding:10px 12px;border-bottom:1px solid var(--border);cursor:pointer}.conv-list li:hover{background:#1d2230}.conv-list .title{font-weight:600}.conv-list .meta{font-size:12px;color:var(--muted);margin-top:4px}.conv-actions,.viewer-actions{padding:8px;border-top:1px solid var(--border);display:flex;gap:8px}.conv-search{display:flex;gap:8px;padding:8px}.viewer{flex:1;display:flex;flex-direction:column;min-height:0}.viewer ul{list-style:none;margin:0;padding:16px;flex:1;overflow-y:auto}.msg{padding:10px 12px;margin-bottom:10px;border:1px solid var(--border);border-radius:8px;background:#11141a}.msg-user{background:#121927}.msg-assistant{background:#131b23}.msg-system{background:#1b1f29;color:#a9b3c3}.msg-tool{background:#1a1f23;color:#b8c0cc}.msg-highlight{outline:2px solid var(--accent)}.msg-meta{display:flex;gap:12px;font-size:12px;color:var(--muted);margin-bottom:6px}.msg-body{white-space:pre-wrap;line-height:1.4}.filters{padding:12px}.filter-group{margin-bottom:12px}.role-chip,.tag-chip{display:inline-flex;align-items:center;gap:6px;margin:4px 6px 0 0;padding:4px 8px;border:1px solid var(--border);border-radius:999px;background:#0f1420;font-size:12px}.tag-chip-selected{background:#102038;border-color:#234a8f}.tag-mode{display:flex;gap:12px;margin-bottom:6px}.date-preview{margin-top:4px;font-size:12px;color:var(--muted)}.import-page{padding:16px;overflow-y:auto}.import-form{display:grid;grid-template-columns:1fr;gap:8px;max-width:480px}.status{margin-top:8px;color:var(--muted)}.placeholder{display:grid;place-items:center;height:100%;color:var(--muted)}.search-results{border-top:1px solid var(--border)}.left-panel .search-results{border-top:0}.search-results h3{font-size:12px;color:var(--muted);margin:8px}.search-results ul{list-style:none;margin:0;padding:0}.search-results li{padding:8px 10px;border-bottom:1px solid var(--border);cursor:pointer}.search-results li:hover{background:#1d2230}.search-results .sr-title{font-weight:600}.search-results .sr-meta{font-size:12px;color:var(--muted)}.search-results .sr-snippet{font-size:12px;color:#c7d0db;margin-top:4px}.search-results .sr-snippet mark,.search-results .sr-snippet span{background:transparent;color:#ffd166;font-weight:600}.search-results-actions{padding:8px}.sr-controls{display:flex;gap:12px;padding:8px}.conv-header{position:sticky;top:0;background:var(--panel);border-bottom:1px solid var(--border);padding:8px 12px;z-index:1;flex-shrink:0}.conv-header .title-line{font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:12px}.conv-header .title-line .title-meta{display:flex;align-items:center;gap:8px}.conv-header .copy-conv-btn{background:transparent;border:1px solid var(--border);color:var(--fg);padding:4px 10px;border-radius:6px;font-size:12px;cursor:pointer}.conv-header .copy-conv-btn:disabled{opacity:.6;cursor:default}.conv-header .copy-conv-btn:hover:not(:disabled){background:#1d2230}.conv-header .conv-times{display:flex;gap:12px;font-size:12px;color:var(--muted);margin-top:4px}.conv-header .title-line 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