*{box-sizing:border-box;margin:0;padding:0;}
:root{
  --bg:#0b0f1a;
  --bg2:#141c30;
  --bg3:#1d2640;
  --fg:#f1f5fb;
  --muted:#b6c2d6;
  --accent:#5ee0c1;
  --accent2:#7aa2f7;
  --warn:#f7a23a;
  --bad:#ef6b6b;
  --good:#5ee0c1;
  --line:rgba(255,255,255,.14);
}
html,body{background:var(--bg);color:var(--fg);font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;height:100%;}
body{display:flex;flex-direction:column;min-height:100vh;}
a{color:inherit;text-decoration:none;}

/* Header */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 28px;border-bottom:1px solid var(--line);background:rgba(11,15,26,.85);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10;}
.brand{display:flex;align-items:center;gap:12px;font-weight:600;letter-spacing:1px;}
.brand .logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#5ee0c1,#7aa2f7);display:flex;align-items:center;justify-content:center;font-size:14px;color:#0b0f1a;font-weight:800;}
.brand .scene{color:var(--muted);font-weight:400;margin-left:14px;padding-left:14px;border-left:1px solid var(--line);font-size:13px;}
.topbar nav{display:flex;gap:6px;font-size:13px;}
.topbar nav a{padding:6px 12px;border-radius:6px;color:var(--muted);}
.topbar nav a:hover{background:var(--bg2);color:var(--fg);}
.topbar nav a.active{background:var(--bg2);color:var(--accent);}
.topbar .now{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* Layout */
.layout{flex:1;display:grid;grid-template-columns:1.4fr 1fr;gap:18px;padding:18px 28px;}
.col{display:flex;flex-direction:column;gap:18px;min-height:0;}
.panel{background:var(--bg2);border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;overflow:hidden;}
.panel h3{padding:14px 18px;font-size:13px;color:var(--muted);font-weight:500;letter-spacing:.5px;text-transform:uppercase;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;}
.panel h3 .dot{width:7px;height:7px;border-radius:50%;background:var(--good);box-shadow:0 0 8px var(--good);display:inline-block;margin-right:8px;animation:pulse 1.6s ease infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.panel .body{padding:14px 18px;}

/* KPI row */
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.kpi{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;}
.kpi .l{font-size:12px;color:var(--muted);}
.kpi .v{font-size:22px;font-weight:600;color:var(--fg);margin-top:6px;}
.kpi .v.good{color:var(--good);}
.kpi .v.warn{color:var(--warn);}
.kpi .v.bad{color:var(--bad);}
.kpi .delta{font-size:11px;color:var(--muted);margin-top:4px;}

/* Camera grid */
.cams{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:14px 18px;}
.cam{position:relative;aspect-ratio:16/10;border-radius:8px;overflow:hidden;border:1px solid var(--line);}
.cam .scene-fx{position:absolute;inset:0;}
.cam .label{position:absolute;top:8px;left:10px;font-size:11px;background:rgba(0,0,0,.55);padding:3px 8px;border-radius:4px;}
.cam .live{position:absolute;top:8px;right:10px;font-size:10px;color:#fff;background:var(--bad);padding:2px 8px;border-radius:3px;font-weight:600;letter-spacing:1px;}
.cam .badge{position:absolute;bottom:8px;left:10px;font-size:11px;padding:3px 8px;border-radius:4px;}
.cam .badge.ok{background:rgba(94,224,193,.15);color:var(--good);border:1px solid rgba(94,224,193,.4);}
.cam .badge.warn{background:rgba(247,162,58,.15);color:var(--warn);border:1px solid rgba(247,162,58,.4);}
.cam .badge.bad{background:rgba(239,107,107,.15);color:var(--bad);border:1px solid rgba(239,107,107,.4);}
.cam .ts{position:absolute;bottom:8px;right:10px;font-size:10px;color:rgba(255,255,255,.7);font-variant-numeric:tabular-nums;}
.cam .person{position:absolute;border:1px solid var(--good);border-radius:2px;}
.cam .person.warn{border-color:var(--warn);}
.cam .person.bad{border-color:var(--bad);}
.cam .person .tag{position:absolute;top:-18px;left:0;background:var(--good);color:#0b0f1a;padding:1px 6px;font-size:9px;font-weight:600;border-radius:2px;white-space:nowrap;}
.cam .person.warn .tag{background:var(--warn);}
.cam .person.bad .tag{background:var(--bad);color:#fff;}

/* Chat */
.chat{flex:1;display:flex;flex-direction:column;min-height:0;}
.chat .stream{flex:1;overflow-y:auto;padding:14px 18px;display:flex;flex-direction:column;gap:14px;}
.chat .msg{max-width:90%;padding:10px 14px;border-radius:10px;font-size:13.5px;line-height:1.7;}
.chat .msg.user{align-self:flex-end;background:linear-gradient(120deg,rgba(94,224,193,.18),rgba(122,162,247,.18));border:1px solid rgba(94,224,193,.3);}
.chat .msg.bot{align-self:flex-start;background:var(--bg3);border:1px solid var(--line);width:100%;max-width:100%;}
.chat .msg.bot .answer{}
.chat .msg.bot .evidence{margin-top:10px;border-top:1px dashed var(--line);padding-top:10px;display:flex;gap:8px;flex-wrap:wrap;}
.chat .msg.bot .ev{background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:6px 10px;font-size:11px;color:var(--muted);cursor:pointer;}
.chat .msg.bot .ev:hover{border-color:var(--accent);color:var(--accent);}
.chat .msg.bot strong{color:var(--accent);}
.chat .msg.bot .num{color:var(--accent2);font-weight:600;}
.chat .quick{padding:8px 18px;display:flex;gap:8px;flex-wrap:wrap;border-top:1px solid var(--line);background:rgba(0,0,0,.15);}
.chat .quick .q{font-size:12px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);cursor:pointer;background:transparent;}
.chat .quick .q:hover{border-color:var(--accent);color:var(--accent);}
.chat .input{padding:12px 18px;display:flex;gap:10px;border-top:1px solid var(--line);}
.chat .input input{flex:1;background:var(--bg);border:1px solid var(--line);color:var(--fg);padding:10px 14px;border-radius:8px;font-size:14px;outline:none;}
.chat .input input:focus{border-color:var(--accent);}
.chat .input button{background:linear-gradient(120deg,#5ee0c1,#7aa2f7);color:#0b0f1a;border:0;padding:0 18px;border-radius:8px;font-weight:600;cursor:pointer;font-size:13px;}

/* Timeline / events */
.events{display:flex;flex-direction:column;}
.event{display:grid;grid-template-columns:60px 18px 1fr auto;padding:10px 18px;border-bottom:1px solid var(--line);font-size:13px;align-items:center;gap:10px;}
.event:last-child{border:0;}
.event .t{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums;}
.event .dot{width:10px;height:10px;border-radius:50%;}
.event .dot.ok{background:var(--good);}
.event .dot.warn{background:var(--warn);}
.event .dot.bad{background:var(--bad);}
.event .desc strong{color:var(--fg);}
.event .desc span{color:var(--muted);font-size:12px;}
.event .tag{font-size:11px;color:var(--muted);background:var(--bg);padding:3px 8px;border-radius:4px;border:1px solid var(--line);}

/* Back link */
.back{font-size:13px;color:var(--muted);}
.back:hover{color:var(--accent);}

@media (max-width:1100px){
  .layout{grid-template-columns:1fr;}
  .kpis{grid-template-columns:repeat(2,1fr);}
}