:root{--bg: #f5f7f5;--bg-elev: #ffffff;--surface: #ffffff;--surface-2: #f0f4f1;--surface-3: #e7ede8;--border: #dbe3dc;--border-strong: #c5d1c7;--text: #16241b;--text-2: #46564a;--text-3: #6b7a6f;--primary: #2f7d46;--primary-strong: #256538;--primary-soft: #e3f0e7;--accent: #c9761f;--accent-soft: #f6e9d8;--danger: #c0392b;--danger-soft: #fbe7e4;--ok: #2f7d46;--warn: #b9770f;--shadow-sm: 0 1px 2px rgba(22, 36, 27, .06), 0 1px 3px rgba(22, 36, 27, .05);--shadow-md: 0 4px 12px rgba(22, 36, 27, .08), 0 2px 4px rgba(22, 36, 27, .05);--shadow-lg: 0 20px 48px rgba(22, 36, 27, .18);--radius: 12px;--radius-sm: 8px;--radius-lg: 18px;--sidebar-w: 236px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #0f1613;--bg-elev: #16211b;--surface: #17211c;--surface-2: #1d2a22;--surface-3: #26332b;--border: #26332b;--border-strong: #33453a;--text: #e8efe9;--text-2: #a9bcb0;--text-3: #7f9587;--primary: #46b56a;--primary-strong: #3fae5a;--primary-soft: #1f3a2a;--accent: #e0912f;--accent-soft: #33280f;--danger: #ff8a7a;--danger-soft: #3a1f1c;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 6px 18px rgba(0, 0, 0, .38);--shadow-lg: 0 24px 60px rgba(0, 0, 0, .55)}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.5}#root{min-height:100vh}a{color:var(--primary);text-decoration:none}h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em}p{margin:0 0 .6rem}small{color:var(--text-3)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.assistant{display:grid;grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh}.sidebar{background:var(--bg-elev);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;gap:6px;position:sticky;top:0;height:100vh}.sidebar .brand-bar{padding:4px 8px 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.12s}.source-card:hover{border-color:var(--primary);box-shadow:var(--shadow-sm)}.source-thumb{width:54px;height:70px;flex:none;border-radius:5px;overflow:hidden;background:var(--surface-3);display:flex;align-items:center;justify-content:center;border:1px solid var(--border)}.source-thumb img{width:100%;height:100%;object-fit:cover;object-position:top}.source-thumb .ico{width:22px;height:22px;color:var(--text-3)}.source-card .info{min-width:0;display:flex;flex-direction:column;gap:4px}.source-card .info strong{font-size:13px;font-weight:620;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.source-card .info small{font-size:11.5px}.score-bar{height:5px;background:var(--surface-3);border-radius:999px;overflow:hidden;margin-top:2px}.score-bar>span{display:block;height:100%;background:var(--primary)}.thread-list{display:flex;flex-direction:column;gap:10px}.thread-row{display:flex;align-items:center;justify-content:space-between;gap:14px;width:100%;text-align:left;padding:14px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);box-shadow:var(--shadow-sm);cursor:pointer;transition:border-color .12s,box-shadow .12s,transform .08s}.thread-row:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-1px)}.thread-row-main{min-width:0;display:flex;flex-direction:column;gap:6px}.thread-row-main strong{font-size:14.5px;font-weight:620;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.thread-row-meta{display:flex;align-items:center;gap:10px;flex:none;font-size:12px;color:var(--text-3)}.unread-dot{width:9px;height:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);flex:none}.chat-list{display:flex;flex-direction:column;gap:10px;max-height:460px;overflow:auto;padding:4px}.chat-bubble{max-width:78%;padding:10px 14px;border-radius:14px;font-size:14px;background:var(--surface-2);align-self:flex-start}.chat-bubble.sent{align-self:flex-end;background:var(--primary);color:#fff}.message-attachment{margin-top:6px;font-size:12px}.list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}.list-button{text-align:left;background:var(--surface-2);color:var(--text);border:1px solid var(--border);width:100%}.list-button:hover{border-color:var(--primary);background:var(--surface-3)}.list-button.active{border-color:var(--primary);background:var(--primary-soft)}.citation-list{list-style:none;padding:0;margin:8px 0 0;display:flex;flex-direction:column;gap:4px;font-size:12.5px;color:var(--text-3)}.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(1200px 600px at 50% -10%,var(--primary-soft),var(--bg))}.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:30px 28px}.auth-card .brand-bar{text-align:center;margin-bottom:22px}.auth-card h1{font-size:22px;margin-top:2px}@media(max-width:860px){.assistant{grid-template-columns:1fr}.sidebar{position:static;height:auto;flex-direction:row;align-items:center;overflow-x:auto;border-right:none;border-bottom:1px solid var(--border);gap:4px;padding:10px}.sidebar .brand-bar,.sidebar-user,.sidebar .spacer{display:none}.nav-item{flex-direction:column;gap:3px;font-size:11px;padding:8px 12px;white-space:nowrap}.grid-layout.two{grid-template-columns:1fr}.content{padding:16px}.topbar{padding:0 16px}}