:root{--sidebar-w: 200px;--topbar-h: 52px;--brand-blue: #185FA5;--nav-active-bg: rgba(24, 95, 165, .1);--nav-active-color: #185FA5;--text: #1a1a1a;--text-muted: #6b7280;--border: rgba(0,0,0,.08);--surface: #ffffff;--bg: #f7f7f6}@media (prefers-color-scheme: dark){:root{--text: #e4e3df;--text-muted: #9ca3af;--border: rgba(255,255,255,.1);--surface: #1c1c1a;--bg: #141413;--nav-active-bg: rgba(55,138,221,.15);--nav-active-color: #85B7EB}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}.shell{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--surface);border-right:.5px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.brand{font-size:15px;font-weight:700;letter-spacing:.06em;color:var(--brand-blue);padding:18px 16px 12px}nav{flex:1;padding:4px 8px}.nav-item{display:flex;align-items:center;gap:8px;padding:7px 8px;border-radius:6px;font-size:13px;color:var(--text-muted);text-decoration:none;transition:background .1s,color .1s}.nav-item:hover{background:var(--nav-active-bg);color:var(--text)}.nav-item.active{background:var(--nav-active-bg);color:var(--nav-active-color);font-weight:500}.nav-icon{font-size:14px;width:18px;text-align:center;flex-shrink:0}.sidebar-footer{padding:10px 8px;border-top:.5px solid var(--border)}.user-row{display:flex;align-items:center;gap:8px}.avatar{width:28px;height:28px;border-radius:50%;background:var(--nav-active-bg);color:var(--nav-active-color);font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0}.user-info{flex:1;min-width:0}.user-name{font-size:12px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-role{font-size:11px;color:var(--text-muted)}.logout-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:14px;padding:2px 4px;border-radius:4px}.logout-btn:hover{color:var(--text)}.main-area{flex:1;display:flex;flex-direction:column;overflow:hidden}.topbar{height:var(--topbar-h);border-bottom:.5px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--surface);flex-shrink:0}.topbar-right{display:flex;align-items:center;gap:10px}.notif-btn,.support-btn{background:none;border:.5px solid var(--border);border-radius:6px;padding:5px 10px;cursor:pointer;font-size:12px;color:var(--text-muted);position:relative}.notif-btn:hover,.support-btn:hover{color:var(--text)}.badge{background:#e24b4a;color:#fff;border-radius:8px;font-size:10px;font-weight:600;padding:0 4px;margin-left:4px}.content{flex:1;overflow-y:auto;padding:24px}.chat-panel{width:320px;flex-shrink:0;background:var(--surface);border-left:.5px solid var(--border);display:flex;flex-direction:column}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-bottom:.5px solid var(--border);font-size:13px;font-weight:500}.chat-header button{background:none;border:none;cursor:pointer;color:var(--text-muted);font-size:14px}.chat-messages{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:8px}.chat-empty{font-size:12px;color:var(--text-muted);text-align:center;margin-top:40px}.chat-msg{font-size:13px;line-height:1.5;padding:8px 11px;border-radius:8px;max-width:90%}.chat-msg.user{background:var(--nav-active-bg);color:var(--nav-active-color);align-self:flex-end}.chat-msg.assistant{background:var(--bg);color:var(--text);align-self:flex-start}.chat-msg.typing{opacity:.5;letter-spacing:4px}.chat-input-row{display:flex;gap:8px;padding:10px;border-top:.5px solid var(--border)}.chat-input-row input{flex:1;font-size:13px;padding:7px 10px;border:.5px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text)}.chat-input-row button{padding:7px 12px;background:var(--brand-blue);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:13px}.chat-input-row button:disabled{opacity:.4;cursor:default}@keyframes blink{0%,to{opacity:.2}50%{opacity:1}}@media (max-width: 768px){.shell{flex-direction:column}.sidebar{width:100%!important;height:56px;flex-direction:row;border-right:none;border-top:.5px solid var(--border);position:fixed;bottom:0;left:0;right:0;z-index:100;overflow-x:auto;overflow-y:hidden}.brand{display:none}nav{display:flex;flex-direction:row;padding:0;flex:1;overflow-x:auto}.nav-item{flex-direction:column;gap:2px;padding:6px 10px;font-size:10px;min-width:56px;align-items:center;border-radius:0;white-space:nowrap}.nav-icon{font-size:16px;width:auto}.sidebar-footer{display:none}.main-area{height:100vh;padding-bottom:56px}.topbar{padding:0 12px;height:48px}.topbar-right{gap:6px}.notif-btn,.support-btn{padding:4px 8px;font-size:11px}.content{padding:16px 12px}.chat-panel{width:100vw!important;position:fixed!important;inset:0 0 56px!important;z-index:200!important;border-left:none!important}.metric-grid{grid-template-columns:repeat(2,1fr)!important}}@media (max-width: 380px){.nav-item{min-width:44px;padding:6px;font-size:9px}.content{padding:12px 8px}}