:root{--bg: #17212b;--bg-2: #232e3c;--bg-3: #2b5278;--panel: #17212b;--panel-2: #1d2733;--side: #17212b;--line: #101921;--hover: #2b5278;--text: #ffffff;--text-muted: #6c7883;--text-dim: #8b95a0;--accent: #229ed9;--accent-2: #5288c1;--bubble-out: #2b5278;--bubble-in: #182533;--bubble-system: #1f2a36;--danger: #e53935;--ok: #4ec38a;--warn: #ffb74d;--radius: 12px;--radius-sm: 8px;--radius-lg: 18px;--shadow: 0 2px 12px rgba(0, 0, 0, .35);--header-h: 56px;--side-w: 320px}@media (prefers-color-scheme: light){:root{--bg: #ffffff;--bg-2: #f4f4f5;--bg-3: #e7f3ff;--panel: #ffffff;--panel-2: #f4f4f5;--side: #ffffff;--line: #e7e9ec;--hover: #f0f4f8;--text: #0f1419;--text-muted: #707579;--text-dim: #a8a8a8;--accent: #3390ec;--accent-2: #4ea1f0;--bubble-out: #effdde;--bubble-in: #ffffff;--bubble-system: #f4f4f5}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Helvetica Neue,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.4;-webkit-font-smoothing:antialiased}input,textarea,button,select{font:inherit;color:inherit}button{cursor:pointer;border:0;background:transparent}a{color:var(--accent);text-decoration:none}.app-shell{display:grid;grid-template-columns:var(--side-w) 1fr;height:100vh;background:var(--bg)}.sidebar{background:var(--side);border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.content{display:flex;flex-direction:column;background:var(--bg);min-width:0}.header{height:var(--header-h);display:flex;align-items:center;padding:0 16px;border-bottom:1px solid var(--line);background:var(--panel);gap:12px}.header-title{font-weight:600;font-size:16px}.header-sub{color:var(--text-muted);font-size:12px}.sidebar-search{padding:10px 12px;border-bottom:1px solid var(--line)}.sidebar-search input{width:100%;background:var(--bg-2);border:1px solid transparent;border-radius:22px;padding:9px 14px;outline:none;color:var(--text)}.sidebar-search input:focus{border-color:var(--accent)}.nav-list{list-style:none;margin:0;padding:8px 0;overflow-y:auto;flex:1}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 14px;cursor:pointer;color:var(--text);border-left:3px solid transparent}.nav-item:hover{background:var(--hover)}.nav-item.active{background:var(--accent);color:#fff}.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0}.avatar.sm{width:32px;height:32px;font-size:13px}.nav-item-body{min-width:0;flex:1}.nav-item-title{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-item-sub{font-size:13px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-item.active .nav-item-sub{color:#ffffffd9}.page{flex:1;overflow-y:auto;padding:24px}.card{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:16px}.row{display:flex;gap:12px;align-items:center}.col{display:flex;flex-direction:column;gap:12px}label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:6px}input.field,select.field,textarea.field{width:100%;background:var(--bg-2);border:1px solid var(--line);color:var(--text);padding:10px 12px;border-radius:var(--radius-sm);outline:none}input.field:focus,select.field:focus,textarea.field:focus{border-color:var(--accent)}.btn{background:var(--accent);color:#fff;padding:10px 18px;border-radius:22px;font-weight:500;display:inline-flex;align-items:center;gap:8px}.btn:hover{background:var(--accent-2)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--accent)}.btn-ghost:hover{background:var(--hover)}.btn-danger{background:var(--danger)}.btn-secondary{background:var(--bg-2);color:var(--text)}.btn-secondary:hover{background:var(--hover)}.auth-shell{display:flex;align-items:center;justify-content:center;height:100vh;padding:24px;background:var(--bg)}.auth-card{width:100%;max-width:400px;background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow)}.auth-logo{width:84px;height:84px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));margin:0 auto 16px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:32px;font-weight:700}.auth-title{text-align:center;font-size:22px;font-weight:600;margin:0 0 6px}.auth-sub{text-align:center;color:var(--text-muted);margin:0 0 24px}.auth-link{text-align:center;margin-top:16px;color:var(--text-muted)}.auth-link a{color:var(--accent)}.error-text{color:var(--danger);font-size:13px;margin-top:6px}.success-text{color:var(--ok);font-size:13px;margin-top:6px}.chat-area{flex:1;display:flex;flex-direction:column;min-height:0}.messages{flex:1;overflow-y:auto;padding:16px 12%;display:flex;flex-direction:column;gap:4px;background-color:var(--bg);background-image:radial-gradient(rgba(255,255,255,.02) 1px,transparent 1px);background-size:20px 20px}.bubble{max-width:70%;padding:7px 12px 8px;border-radius:16px;position:relative;word-wrap:break-word}.bubble.in{align-self:flex-start;background:var(--bubble-in);border-bottom-left-radius:4px}.bubble.out{align-self:flex-end;background:var(--bubble-out);border-bottom-right-radius:4px}.bubble.system{align-self:center;background:var(--bubble-system);font-size:13px;color:var(--text-muted);border-radius:12px;white-space:pre-line}.bubble-author{font-size:13px;font-weight:600;color:var(--accent);margin-bottom:2px}.bubble-time{font-size:11px;color:var(--text-muted);margin-left:8px;float:right;margin-top:4px}.bubble img{max-width:360px;max-height:320px;border-radius:8px;display:block;margin:4px 0}.composer{display:flex;align-items:flex-end;gap:8px;padding:10px 12px;border-top:1px solid var(--line);background:var(--panel)}.composer textarea{flex:1;background:var(--bg-2);border:1px solid var(--line);border-radius:18px;padding:10px 14px;color:var(--text);resize:none;max-height:120px;outline:none}.composer textarea:focus{border-color:var(--accent)}.composer button.send{background:var(--accent);color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.composer button.attach{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-muted);flex-shrink:0}.composer button.attach:hover{background:var(--hover);color:var(--text)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted)}.offline-bar{background:var(--warn);color:#1a1a1a;text-align:center;font-size:13px;padding:6px}.offline-bar.online{background:var(--ok);color:#fff}.badge{background:var(--accent);color:#fff;border-radius:12px;padding:2px 8px;font-size:12px;margin-left:auto}.spinner{width:24px;height:24px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.mobile-burger,.sidebar-backdrop{display:none}@media (max-width: 720px){.app-shell{grid-template-columns:1fr}.sidebar{display:none}.app-shell.show-sidebar .sidebar{display:flex;position:fixed;top:0;left:0;bottom:0;width:min(86vw,320px);z-index:60;box-shadow:var(--shadow)}.app-shell.show-sidebar .sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:55}.mobile-burger{display:flex;position:fixed;top:max(12px,env(safe-area-inset-top));left:12px;z-index:50;width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;align-items:center;justify-content:center;box-shadow:var(--shadow);font-size:20px}.header{padding-left:60px}.messages{padding:12px 8px}.bubble{max-width:88%}}table.simple{width:100%;border-collapse:collapse;font-size:14px}table.simple th,table.simple td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}table.simple th{color:var(--text-muted);font-weight:500}