:root{--navy-900: #0a1628;--navy-800: #0f2035;--navy-700: #132b46;--navy-600: #1a3a5c;--navy-500: #1e4976;--blue-500: #2f78c6;--blue-400: #4a94de;--blue-300: #6fb0f0;--blue-200: #a3cff7;--blue-100: #daeaf9;--blue-50: #edf4fb;--teal-500: #0ea5e9;--teal-400: #38bdf8;--teal-300: #7dd3fc;--teal-200: #bae6fd;--amber-500: #f59e0b;--amber-400: #fbbf24;--amber-200: #fde68a;--surface-dark: #0d1b2a;--surface-card: #ffffff;--surface-alt: #f8fafc;--text-primary: #0f3554;--text-secondary: #2d4b65;--text-muted: #64748b;--text-inverse: #e2e8f0;--text-bright: #f1f5f9;--border-subtle: rgba(47, 120, 198, .1);--border-light: rgba(47, 120, 198, .06);--success: #16a34a;--error: #dc2626;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-pill: 9999px;--shadow-sm: 0 1px 3px rgba(0,0,0,.04);--shadow-md: 0 4px 16px rgba(0,0,0,.08);--shadow-lg: 0 8px 32px rgba(0,0,0,.12);--shadow-glow: 0 0 40px rgba(14,165,233,.12);--font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "Fira Code", "Cascadia Code", "Consolas", monospace}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-sans);background:var(--navy-900);color:var(--text-primary);-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#2f78c633;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#2f78c659}@keyframes fadeInUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes typingBounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-6px)}}@keyframes pulseRing{0%{transform:scale(.85);opacity:.6}50%{transform:scale(1.15);opacity:0}to{transform:scale(.85);opacity:0}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes glowPulse{0%,to{box-shadow:0 0 20px #0ea5e926}50%{box-shadow:0 0 35px #0ea5e94d}}.app-container{display:flex;height:100vh;overflow:hidden}.sidebar{width:280px;min-width:280px;background:linear-gradient(180deg,var(--navy-800) 0%,var(--navy-900) 100%);display:flex;flex-direction:column;border-right:1px solid rgba(255,255,255,.06);position:relative;z-index:10;overflow-y:auto}.sidebar-brand{padding:24px 20px 20px;border-bottom:1px solid rgba(255,255,255,.06)}.brand-icon{width:44px;height:44px;background:linear-gradient(135deg,var(--teal-500) 0%,var(--blue-500) 100%);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;box-shadow:0 4px 16px #0ea5e94d;margin-bottom:14px}.brand-title{font-size:1.1rem;font-weight:800;letter-spacing:-.02em;background:linear-gradient(135deg,var(--teal-400),var(--blue-300));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}.brand-subtitle{font-size:.62rem;color:var(--text-muted);letter-spacing:.08em;text-transform:uppercase;margin-top:4px;line-height:1.5}.new-chat-btn{margin:16px 16px 8px;padding:10px 16px;background:linear-gradient(135deg,var(--teal-500),var(--blue-500));color:#fff;border:none;border-radius:var(--radius-md);font-size:.82rem;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s;box-shadow:0 2px 10px #0ea5e940}.new-chat-btn:hover{transform:translateY(-1px);box-shadow:0 4px 16px #0ea5e966}.sidebar-section-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:#ffffff40;padding:20px 20px 8px}.quick-action{display:flex;align-items:center;gap:10px;padding:9px 20px;color:var(--text-inverse);font-size:.78rem;cursor:pointer;transition:all .15s;border:none;background:transparent;width:100%;text-align:left;font-family:var(--font-sans)}.quick-action:hover{background:#ffffff0d;color:var(--teal-300)}.quick-action .qa-icon{width:28px;height:28px;border-radius:var(--radius-sm);background:#ffffff0d;display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0}.sidebar-footer{margin-top:auto;padding:16px 20px;border-top:1px solid rgba(255,255,255,.06)}.model-badge{display:flex;align-items:center;gap:6px;font-size:.65rem;color:#ffffff59;margin-bottom:6px}.model-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--success);box-shadow:0 0 6px #16a34a80}.sidebar-version{font-size:.6rem;color:#ffffff2e}.chat-main{flex:1;display:flex;flex-direction:column;background:linear-gradient(180deg,#edf4fb,#e2edf8,#d8e5f0);position:relative;overflow:hidden;min-height:0}.chat-main:before{content:"";position:absolute;top:0;left:50%;width:600px;height:400px;transform:translate(-50%);background:radial-gradient(ellipse at 50% 0%,rgba(14,165,233,.05) 0%,transparent 70%);pointer-events:none;z-index:0}.chat-header{padding:14px 24px;background:linear-gradient(135deg,var(--navy-700) 0%,var(--navy-800) 100%);display:flex;align-items:center;gap:14px;border-bottom:1px solid rgba(255,255,255,.06);position:relative;z-index:2;box-shadow:0 4px 16px #00000014;flex-shrink:0}.chat-header:after{content:"";position:absolute;bottom:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(14,165,233,.2),transparent)}.header-avatar{width:36px;height:36px;background:linear-gradient(135deg,var(--teal-500),var(--blue-500));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:17px;box-shadow:0 2px 10px #0ea5e959;flex-shrink:0}.header-info h2{font-size:.95rem;font-weight:700;color:var(--text-bright);letter-spacing:-.01em}.header-info p{font-size:.62rem;color:var(--text-muted)}.header-right{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}.header-user{font-size:.78rem;color:var(--text-muted);font-weight:500;white-space:nowrap}.logout-btn{padding:6px 14px;border-radius:9999px;border:1px solid rgba(255,255,255,.15);background:#ffffff0f;color:var(--text-muted);font-size:.75rem;font-weight:600;cursor:pointer;transition:all .2s;white-space:nowrap}.logout-btn:hover{background:#ef444426;border-color:#ef444466;color:#f87171}.messages-container{flex:1;overflow-y:auto;padding:24px;position:relative;z-index:1;min-height:0}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;animation:fadeIn .6s ease;padding:40px}.welcome-icon{width:80px;height:80px;background:linear-gradient(135deg,#0ea5e914,#2f78c60f);border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;font-size:38px;margin-bottom:20px;position:relative}.welcome-icon:before{content:"";position:absolute;inset:-12px;border-radius:50%;border:1.5px solid rgba(14,165,233,.08);animation:pulseRing 3s ease-in-out infinite}.welcome-title{font-size:1.6rem;font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,var(--navy-700),var(--blue-500));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.welcome-sub{font-size:.88rem;color:var(--text-muted);max-width:400px;line-height:1.65;margin-bottom:28px}.welcome-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:32px}.welcome-tag{padding:4px 12px;border-radius:var(--radius-pill);font-size:.68rem;font-weight:600;background:#0ea5e914;color:var(--blue-500);border:1px solid rgba(14,165,233,.12)}.prompt-suggestions{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:520px;width:100%}.prompt-card{padding:14px 16px;background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);cursor:pointer;text-align:left;transition:all .2s;box-shadow:var(--shadow-sm);font-family:var(--font-sans)}.prompt-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--teal-500)}.prompt-card .pc-icon{font-size:16px;margin-bottom:6px}.prompt-card .pc-text{font-size:.75rem;color:var(--text-secondary);line-height:1.5}.message{display:flex;gap:12px;margin-bottom:20px;animation:fadeInUp .35s ease;max-width:780px}.message.user-msg{flex-direction:row-reverse;margin-left:auto}.msg-avatar{width:32px;height:32px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;margin-top:2px}.bot-msg .msg-avatar{background:linear-gradient(135deg,var(--teal-500),var(--blue-500));box-shadow:0 2px 8px #0ea5e94d}.user-msg .msg-avatar{background:linear-gradient(135deg,#cbd5e1,#94a3b8);color:#475569;font-weight:700;font-size:12px}.msg-content{max-width:600px;min-width:60px}.msg-bubble{padding:14px 18px;line-height:1.7;font-size:.86rem;word-break:break-word;white-space:pre-line}.bot-msg .msg-bubble{background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:18px 18px 18px 4px;color:var(--text-primary);box-shadow:var(--shadow-sm)}.user-msg .msg-bubble{background:linear-gradient(135deg,var(--blue-500) 0%,#2665a4 100%);border-radius:18px 18px 4px;color:#fff;box-shadow:0 2px 12px #2f78c640}.msg-bubble strong{font-weight:700}.msg-bubble code{font-family:var(--font-mono);font-size:.8rem;background:#0ea5e914;padding:1px 5px;border-radius:4px}.user-msg .msg-bubble code{background:#ffffff26}.msg-bubble table{border-collapse:collapse;margin:10px 0;font-size:.78rem;width:100%}.msg-bubble th{background:var(--blue-50);padding:6px 10px;text-align:left;font-weight:700;font-size:.7rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-secondary);border-bottom:2px solid var(--border-subtle)}.msg-bubble td{padding:5px 10px;border-bottom:1px solid var(--border-light);font-family:var(--font-mono);font-size:.76rem}.msg-bubble tr:hover td{background:#0ea5e908}.tool-call-card{margin-top:8px;padding:8px 12px;background:#0ea5e90a;border:1px solid rgba(14,165,233,.1);border-radius:var(--radius-sm);font-size:.68rem;color:var(--text-muted);display:flex;align-items:center;gap:6px}.tool-call-card .tool-icon{font-size:12px}.tool-call-card .tool-name{font-family:var(--font-mono);font-weight:600;color:var(--teal-500)}.tool-call-card .tool-rounds{margin-left:auto;opacity:.6}.typing-indicator{display:flex;gap:12px;margin-bottom:20px;animation:fadeInUp .3s ease}.typing-dots{display:flex;align-items:center;gap:4px;padding:14px 20px;background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:18px 18px 18px 4px;box-shadow:var(--shadow-sm)}.typing-dots span{width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,var(--teal-500),var(--blue-500));animation:typingBounce 1.4s ease-in-out infinite}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}.input-area{padding:16px 24px 20px;background:var(--surface-card);border-top:1px solid var(--border-light);box-shadow:0 -2px 12px #0000000a;position:relative;z-index:2;flex-shrink:0;margin-top:auto}.input-area:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(14,165,233,.12),transparent)}.input-wrapper{display:flex;align-items:flex-end;gap:10px;max-width:780px;margin:0 auto}.input-box{flex:1;position:relative}#messageInput{width:100%;padding:12px 16px;border:1.5px solid var(--border-subtle);border-radius:var(--radius-md);font-size:.86rem;font-family:var(--font-sans);color:var(--text-primary);background:var(--surface-alt);outline:none;transition:all .2s;resize:none;height:44px;line-height:1.5}#messageInput:focus{border-color:var(--teal-500);box-shadow:0 0 0 3px #0ea5e914;background:#fff}#messageInput::placeholder{color:var(--text-muted);font-size:.82rem}.send-btn{width:42px;height:42px;border-radius:var(--radius-md);border:none;background:linear-gradient(135deg,var(--teal-500),var(--blue-500));color:#fff;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;box-shadow:0 2px 10px #0ea5e94d;flex-shrink:0}.send-btn:hover{transform:translateY(-1px);box-shadow:0 4px 16px #0ea5e966}.send-btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}.input-hint{font-size:.62rem;color:var(--text-muted);text-align:center;margin-top:8px;opacity:.7}@media(max-width:768px){.sidebar{display:none}.messages-container{padding:16px}.input-area{padding:12px 16px 16px}.prompt-suggestions{grid-template-columns:1fr}}