:root{
  --bg:#0f1419; --panel:#171d26; --panel2:#1e2632; --line:#2a3441;
  --fg:#e6edf3; --muted:#8b98a5; --accent:#4c9be8; --accent2:#5ac8a8;
  --warn:#e0a34e; --bad:#e05a5a; --ok:#5ac8a8;
  --chart-a:#4c9be8; --chart-b:#5ac8a8; --chart-c:#e0a34e; --chart-d:#c07ce0;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font-family:-apple-system,"Segoe UI","Microsoft JhengHei",system-ui,sans-serif;font-size:14px;line-height:1.5}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

.topbar{display:flex;align-items:center;gap:20px;padding:10px 20px;
  background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.topbar .brand{font-weight:700;font-size:16px}
.topbar nav{display:flex;gap:6px;flex:1}
.topbar nav a{padding:6px 14px;border-radius:6px;color:var(--muted)}
.topbar nav a:hover{background:var(--panel2);text-decoration:none}
.topbar nav a.on{background:var(--accent);color:#fff}
.topbar .logout{color:var(--muted);font-size:13px}

main{max-width:1200px;margin:0 auto;padding:20px}
h1{font-size:20px;margin:0 0 16px}
h2{font-size:15px;margin:0 0 12px;color:var(--muted);font-weight:600}

.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px}
.card .k{color:var(--muted);font-size:12px;margin-bottom:6px}
.card .v{font-size:22px;font-weight:700}
.card .v.small{font-size:16px}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:16px}
.panel .head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.chart-wrap{position:relative;height:320px}
.chart-wrap.short{height:220px}

table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:12px}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tr:hover td{background:var(--panel2)}
.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;background:var(--panel2);color:var(--muted)}
.tag.on{background:rgba(90,200,168,.15);color:var(--ok)}
.tag.off{background:rgba(224,90,90,.15);color:var(--bad)}

.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
input,select,button{font:inherit;color:var(--fg);background:var(--panel2);
  border:1px solid var(--line);border-radius:6px;padding:8px 12px}
input:focus,select:focus{outline:none;border-color:var(--accent)}
button{background:var(--accent);border-color:var(--accent);color:#fff;cursor:pointer}
button:hover{opacity:.9}
button.ghost{background:var(--panel2);color:var(--fg)}
.seg{display:flex;gap:0;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg button{border:none;border-radius:0;background:var(--panel2);color:var(--muted)}
.seg button.on{background:var(--accent);color:#fff}

.muted{color:var(--muted)}
.right{margin-left:auto}
.mono{font-variant-numeric:tabular-nums}
.foot{max-width:1200px;margin:0 auto;padding:16px 20px 30px;color:var(--muted);font-size:12px}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin:0 4px}
.dot.ok{background:var(--ok)}
.dot.bad{background:var(--bad)}
.foot .live-toggle{cursor:pointer;user-select:none;margin-right:12px}
.foot .live-toggle input{vertical-align:-1px;margin-right:4px}
.foot .live-status{color:var(--fg)}
.foot .sep{margin:0 10px;opacity:.4}

/* login */
.login-box{max-width:340px;margin:12vh auto;background:var(--panel);
  border:1px solid var(--line);border-radius:12px;padding:28px}
.login-box h1{text-align:center}
.login-box input{width:100%;margin-bottom:12px}
.login-box button{width:100%}
.err{color:var(--bad);font-size:13px;margin-bottom:12px;text-align:center}
.autocomplete{position:relative}
.ac-list{position:absolute;top:100%;left:0;right:0;background:var(--panel2);
  border:1px solid var(--line);border-radius:6px;margin-top:2px;max-height:280px;
  overflow:auto;z-index:20;display:none}
.ac-list div{padding:8px 12px;cursor:pointer}
.ac-list div:hover,.ac-list div.sel{background:var(--accent);color:#fff}