:root{--sidebar-bg: #1a1a2e;--sidebar-text: #a0aec0;--primary: #0180c2;--primary-hover: #016aab;--bg: #f4f5f7;--card: #ffffff;--border: #e2e8f0;--text: #1a202c;--muted: #718096;--danger: #e53e3e;--radius: 8px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);height:100vh;overflow:hidden}.chat-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:220px;min-width:220px;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;padding:24px 16px;gap:20px}.sidebar-logo{font-size:18px;font-weight:700;color:#fff;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar-section{display:flex;flex-direction:column;gap:2px}.sidebar-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#a0aec099}.sidebar-value{font-size:13px;color:#e2e8f0;font-weight:500}.sidebar-actions{margin-top:auto;display:flex;flex-direction:column;gap:8px}.chat-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.chat-messages{flex:1;overflow-y:auto;padding:32px 24px;display:flex;flex-direction:column;gap:20px}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--muted);text-align:center;padding-top:80px}.chat-empty-icon{font-size:48px;margin-bottom:8px}.chat-empty h2{font-size:22px;color:var(--text)}.chat-empty p{font-size:14px}.message{display:flex;gap:12px;max-width:800px}.message-user{flex-direction:row-reverse;align-self:flex-end}.message-assistant{align-self:flex-start}.message-avatar{width:32px;height:32px;min-width:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}.message-user .message-avatar{background:var(--primary);color:#fff}.message-assistant .message-avatar{background:#2d3748;color:#e2e8f0}.message-bubble{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;font-size:14px;line-height:1.6;white-space:pre-wrap;word-break:break-word;max-width:640px}.message-user .message-bubble{background:var(--primary);color:#fff;border-color:var(--primary)}.cursor{display:inline-block;width:2px;height:14px;background:var(--primary);margin-left:2px;vertical-align:middle;animation:blink .8s step-end infinite}@keyframes blink{50%{opacity:0}}.chat-input-bar{display:flex;align-items:flex-end;gap:10px;padding:16px 24px;border-top:1px solid var(--border);background:var(--card)}.chat-textarea{flex:1;resize:none;border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;font-size:14px;font-family:var(--font);line-height:1.5;max-height:160px;overflow-y:auto;outline:none;transition:border-color .15s}.chat-textarea:focus{border-color:var(--primary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 18px;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;border:none;transition:background .15s,opacity .15s;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-stop{background:#e53e3e;color:#fff}.btn-stop:hover{background:#c53030}.btn-ghost{background:#ffffff12;color:var(--sidebar-text);width:100%}.btn-ghost:hover{background:#ffffff1f}.btn-ghost.danger:hover{background:#e53e3e33;color:#fc8181}.login-page{display:flex;align-items:center;justify-content:center;height:100vh;background:linear-gradient(135deg,#1a1a2e,#16213e)}.login-card{background:#fff;border-radius:12px;padding:40px;width:380px;box-shadow:0 20px 60px #0000004d}.login-logo{text-align:center;margin-bottom:28px}.login-logo h1{font-size:24px;font-weight:700}.login-logo p{font-size:13px;color:var(--muted);margin-top:4px}.fg{margin-bottom:16px}.fg label{display:block;font-size:13px;font-weight:500;color:var(--muted);margin-bottom:6px}.fg input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none;transition:border-color .15s;font-family:var(--font)}.fg input:focus{border-color:var(--primary)}.login-card .btn{width:100%;margin-top:8px}.message-content{display:flex;flex-direction:column;gap:6px;max-width:640px}.tool-activity{font-size:12px;color:var(--muted);background:#f0f4ff;border:1px solid #c3d0f5;border-radius:4px;padding:4px 10px;font-family:monospace}.thinking{color:var(--muted);font-style:italic;font-size:13px}.chat-suggestions{display:flex;flex-direction:column;gap:8px;margin-top:16px;width:100%;max-width:480px}.suggestion{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:10px 16px;font-size:13px;color:var(--text);cursor:pointer;text-align:left;transition:border-color .15s,background .15s}.suggestion:hover{border-color:var(--primary);background:#f0f7ff}.error-msg{color:var(--danger);font-size:13px;margin-bottom:12px}.chat-error{text-align:center;padding:8px;background:#fff5f5;border-radius:var(--radius);border:1px solid #feb2b2}