:root{--bg-primary:#0f1117;--bg-secondary:#1a1d27;--bg-tertiary:#242836;--bg-hover:#2d3245;--text-primary:#e4e7ef;--text-secondary:#8b92a8;--text-muted:#5a6178;--accent:#4f8fff;--accent-dim:#36c;--success:#3ec97a;--warning:#e5a63e;--error:#e54e4e;--border:#2d3245;--radius:8px;--radius-lg:12px;--font:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono:"JetBrains Mono", "Fira Code", "SF Mono", monospace}*{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%;font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);font-size:14px;line-height:1.5}.login-container{background:linear-gradient(135deg,#0a0c14 0%,#12152a 50%,#0f1117 100%);justify-content:center;align-items:center;height:100%;display:flex}.login-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);width:380px;padding:48px 40px;box-shadow:0 20px 60px #00000080}.login-header{text-align:center;margin-bottom:32px}.login-header h1{letter-spacing:4px;color:var(--accent);margin-bottom:8px;font-size:28px;font-weight:700}.login-subtitle{color:var(--text-secondary);font-size:13px}.form-group{margin-bottom:16px}.form-group input{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);width:100%;color:var(--text-primary);outline:none;padding:12px 16px;font-size:14px;transition:border-color .2s}.form-group input:focus{border-color:var(--accent)}.error{color:var(--error);margin:8px 0;font-size:13px}.btn-primary{background:var(--accent);color:#fff;border-radius:var(--radius);cursor:pointer;border:none;width:100%;padding:12px;font-size:14px;font-weight:600;transition:background .2s}.btn-primary:hover{background:var(--accent-dim)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.chat-layout{height:100%;display:flex}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:260px;transition:width .2s;display:flex}.sidebar.collapsed{width:48px}.sidebar-header{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:16px;display:flex}.sidebar-title{letter-spacing:3px;color:var(--accent);font-size:16px;font-weight:700}.sidebar-nav{flex:1;padding:12px 0;overflow-y:auto}.nav-section{padding:8px 16px}.nav-section-title{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:8px;font-size:11px;font-weight:600}.nav-item{border-radius:var(--radius);cursor:pointer;color:var(--text-secondary);align-items:center;gap:8px;padding:6px 8px;font-size:13px;transition:all .15s;display:flex}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.muted{color:var(--text-muted);cursor:default}.nav-dot{background:var(--text-muted);border-radius:50%;flex-shrink:0;width:6px;height:6px}.nav-dot.active{background:var(--success)}.nav-label{flex:1}.nav-badge{background:var(--bg-tertiary);color:var(--text-muted);border-radius:10px;padding:1px 6px;font-size:11px}.sidebar-footer{border-top:1px solid var(--border);padding:16px}.btn-logout{border:1px solid var(--border);border-radius:var(--radius);width:100%;color:var(--text-secondary);cursor:pointer;background:0 0;padding:8px;font-size:13px;transition:all .15s}.btn-logout:hover{border-color:var(--error);color:var(--error)}.chat-main{flex-direction:column;flex:1;min-width:0;display:flex}.chat-messages{flex-direction:column;flex:1;gap:16px;padding:24px;display:flex;overflow-y:auto}.message{width:100%;max-width:800px;margin:0 auto;display:flex}.message.user{justify-content:flex-end}.message-content{border-radius:var(--radius-lg);word-wrap:break-word;max-width:85%;padding:12px 16px}.message.user .message-content{background:var(--accent);color:#fff;border-bottom-right-radius:4px}.message.assistant .message-content{background:var(--bg-tertiary);border-bottom-left-radius:4px}.message.system .message-content{color:var(--text-secondary);text-align:center;border:1px solid var(--border);background:0 0;max-width:100%;font-size:13px}.message-content.thinking{color:var(--text-muted);text-align:center;background:0 0;font-style:italic;animation:1.5s infinite pulse}@keyframes pulse{0%,to{opacity:.4}50%{opacity:1}}.message-meta{flex-wrap:wrap;gap:6px;margin-bottom:6px;display:flex}.badge{font-size:10px;font-family:var(--font-mono);border-radius:4px;padding:2px 6px;font-weight:600}.badge.layer-0{color:var(--success);background:#1a3a2a}.badge.layer-1{color:#8ec97a;background:#2a3a1a}.badge.layer-2{color:var(--accent);background:#1a2a3a}.badge.layer-3{color:var(--warning);background:#3a2a1a}.badge.layer-4{color:#e58e8e;background:#3a1a2a}.badge.tool{background:var(--bg-hover);color:var(--text-secondary)}.badge.latency{color:var(--text-muted);background:0 0}.message-text{white-space:pre-wrap;line-height:1.6}.chat-input-bar{border-top:1px solid var(--border);background:var(--bg-secondary);align-items:flex-end;gap:8px;padding:16px 24px;display:flex}.chat-input-bar textarea{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:14px;font-family:var(--font);resize:none;outline:none;flex:1;max-height:120px;padding:10px 14px;line-height:1.5}.chat-input-bar textarea:focus{border-color:var(--accent)}.btn-icon{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);width:38px;height:38px;color:var(--text-secondary);cursor:pointer;flex-shrink:0;justify-content:center;align-items:center;font-size:18px;transition:all .15s;display:flex}.btn-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-send{background:var(--accent);color:#fff;border-radius:var(--radius);cursor:pointer;border:none;flex-shrink:0;padding:10px 20px;font-size:13px;font-weight:600;transition:background .15s}.btn-send:hover{background:var(--accent-dim)}.btn-send:disabled{opacity:.3;cursor:not-allowed}.file-upload{border-top:1px solid var(--border);background:var(--bg-secondary);padding:16px 24px}.file-upload.dragging{background:var(--bg-tertiary);border-top-color:var(--accent)}.file-upload-content{border:2px dashed var(--border);border-radius:var(--radius-lg);text-align:center;color:var(--text-secondary);padding:24px}.file-upload.dragging .file-upload-content{border-color:var(--accent);color:var(--text-primary)}.file-hint{color:var(--text-muted);margin-top:4px;font-size:12px}.file-upload-actions{justify-content:center;gap:8px;margin-top:12px;display:flex}.btn-secondary{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-secondary);cursor:pointer;padding:8px 16px;font-size:13px;transition:all .15s}.btn-secondary:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-secondary:disabled{opacity:.5;cursor:not-allowed}.result-table-wrap{border-radius:var(--radius);border:1px solid var(--border);margin-top:12px;overflow-x:auto}.result-table{border-collapse:collapse;width:100%;font-size:12px;font-family:var(--font-mono)}.result-table th{background:var(--bg-hover);text-align:left;color:var(--text-secondary);white-space:nowrap;border-bottom:1px solid var(--border);padding:6px 10px;font-weight:600}.result-table td{border-bottom:1px solid var(--border);color:var(--text-primary);padding:5px 10px}.result-table tr:last-child td{border-bottom:none}.result-table tr:hover td{background:#4f8fff0d}.table-overflow{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);padding:6px;font-size:11px}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}