:root{
  --bg:#0d1117; --bg2:#161b22; --bg3:#1c2128; --border:#30363d;
  --text:#e6edf3; --text2:#8b949e; --text3:#6e7681;
  --accent:#58a6ff; --accent2:#79c0ff;
  --green:#3fb950; --red:#f85149; --yellow:#d29922; --orange:#f0883e;
  --cyan:#39c5cf; --violet:#a371f7; --pink:#db61a2;
  --shadow:0 8px 24px rgba(0,0,0,0.5);
  --chart-grid:rgba(48,54,61,0.6);
  color-scheme: dark;
}
/* Light theme (system preference auto OR explicit toggle) */
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#ffffff; --bg2:#f6f8fa; --bg3:#eaeef2; --border:#d0d7de;
    --text:#1f2328; --text2:#59636e; --text3:#818b98;
    --accent:#0969da; --accent2:#218bff;
    --green:#1a7f37; --red:#cf222e; --yellow:#9a6700; --orange:#bc4c00;
    --cyan:#0550ae; --violet:#8250df; --pink:#bf3989;
    --shadow:0 4px 14px rgba(140,149,159,0.25);
    --chart-grid:rgba(208,215,222,0.7);
    color-scheme: light;
  }
}
:root[data-theme="light"]{
  --bg:#ffffff; --bg2:#f6f8fa; --bg3:#eaeef2; --border:#d0d7de;
  --text:#1f2328; --text2:#59636e; --text3:#818b98;
  --accent:#0969da; --accent2:#218bff;
  --green:#1a7f37; --red:#cf222e; --yellow:#9a6700; --orange:#bc4c00;
  --cyan:#0550ae; --violet:#8250df; --pink:#bf3989;
  --shadow:0 4px 14px rgba(140,149,159,0.25);
  --chart-grid:rgba(208,215,222,0.7);
  color-scheme: light;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI',sans-serif;
     background:var(--bg);color:var(--text);min-height:100vh;font-size:14px;line-height:1.5;}
body.centered{display:flex;justify-content:center;align-items:center;padding:20px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.muted{color:var(--text2)}
.container{max-width:1600px;margin:0 auto;padding:20px}
.topbar{background:var(--bg2);border-bottom:1px solid var(--border);
        padding:10px 20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.topbar .brand{font-size:14px;font-weight:600;letter-spacing:-0.2px}
.topbar .nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.topbar .nav-links a{padding:6px 10px;color:var(--text2);border-radius:5px;font-size:13px}
.topbar .nav-links a:hover{background:var(--bg3);color:var(--text);text-decoration:none}
.topbar .nav-links a.active{color:var(--accent);background:rgba(88,166,255,0.1)}
.user-pill{font-size:11px;color:var(--text2);padding:3px 8px;background:var(--bg3);border-radius:4px}
.btn-link{background:transparent;border:1px solid var(--border);color:var(--text2);padding:5px 10px;border-radius:5px;cursor:pointer;font-size:12px}
.btn-link:hover{border-color:var(--red);color:var(--red)}
.btn-primary{background:var(--accent);color:var(--bg);border:none;padding:10px 18px;border-radius:6px;cursor:pointer;font-weight:600;font-size:13px}
.btn-primary:hover{background:var(--accent2)}
.btn-mini{background:var(--bg3);color:var(--text);border:1px solid var(--border);padding:4px 8px;border-radius:4px;cursor:pointer;font-size:11px}
.btn-mini:hover{border-color:var(--accent)}
.card{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:24px;margin-bottom:20px}
.card.narrow{max-width:480px;margin-left:auto;margin-right:auto}
.card.wide{max-width:none}
.card h1,.card h2{margin-bottom:14px;font-size:18px;font-weight:600}
.card h3{margin-top:18px;margin-bottom:10px;font-size:14px;font-weight:600}
.login-card{min-width:340px;max-width:380px}
.login-card label{display:block;margin-bottom:12px;font-size:12px;color:var(--text2)}
.login-card input,.card label input,.card label select,.card input,.card select{
  width:100%;background:var(--bg);border:1px solid var(--border);
  padding:10px 12px;border-radius:6px;color:var(--text);font-size:13px;margin-top:4px}
.login-card input:focus,.card input:focus,.card select:focus{outline:none;border-color:var(--accent)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:12px}
.form-row input,.form-row select{width:auto;flex:1;min-width:140px;margin-top:0}
.alert{padding:10px 14px;border-radius:6px;margin-bottom:12px;font-size:12px}
.alert.err{background:rgba(248,81,73,0.08);border:1px solid var(--red);color:var(--red)}
.alert.ok{background:rgba(63,185,80,0.08);border:1px solid var(--green);color:var(--green)}
.data-table{width:100%;border-collapse:collapse;font-size:12px;margin-top:8px}
.data-table th,.data-table td{padding:8px 10px;text-align:left;border-bottom:1px solid var(--border)}
.data-table th{color:var(--text2);font-weight:500;font-size:11px;text-transform:uppercase;letter-spacing:0.4px;background:var(--bg3)}
.data-table tr.stale td{opacity:0.5}
.data-table tr:hover td{background:rgba(88,166,255,0.04)}
.actions{display:flex;gap:5px}
.badge{display:inline-block;padding:2px 7px;border-radius:4px;background:var(--bg3);color:var(--text2);font-size:11px;font-weight:500}
.badge.ok{background:rgba(63,185,80,0.15);color:var(--green)}
.badge.err{background:rgba(248,81,73,0.15);color:var(--red)}
.badge.muted{background:transparent;border:1px solid var(--border)}

/* Dashboard-specific */
.dash-header{display:flex;justify-content:space-between;align-items:flex-end;
             border-bottom:1px solid var(--border);padding-bottom:20px;margin-bottom:20px;flex-wrap:wrap;gap:12px}
.dash-header h1{font-size:22px;font-weight:600;letter-spacing:-0.3px}
.dash-header h1 .accent{color:var(--accent)}
.dash-header .sub{color:var(--text2);font-size:13px;margin-top:4px}
.dash-header .meta{text-align:right;color:var(--text2);font-size:12px}
.dash-header .meta .src-badge{display:inline-block;padding:3px 8px;border:1px solid var(--yellow);
                                color:var(--yellow);border-radius:4px;font-size:10px;font-weight:500;margin-top:4px}
.switcher{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap;align-items:center}
.switcher .label-group{font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:0.5px;
                       margin-right:6px;margin-left:6px;font-weight:600}
.switcher .label-group:first-child{margin-left:0}
.switcher button{background:var(--bg2);color:var(--text2);border:1px solid var(--border);
                 padding:6px 13px;border-radius:6px;font-size:12px;cursor:pointer;transition:all .15s;font-weight:500}
.switcher button:hover{border-color:var(--accent);color:var(--text)}
.switcher button.active{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.switcher button.partial{border-style:dashed}
.switcher button.disabled{opacity:0.4;cursor:not-allowed;background:transparent}
.partial-banner{background:rgba(210,153,34,0.08);border:1px solid var(--yellow);
                border-radius:6px;padding:10px 14px;margin-bottom:18px;display:none;
                font-size:12px;color:var(--yellow)}
.partial-banner.show{display:block}
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-bottom:24px}
.kpi{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:14px;transition:all .15s}
.kpi:hover{border-color:var(--accent);transform:translateY(-1px)}
.kpi .label{color:var(--text2);font-size:10px;text-transform:uppercase;letter-spacing:0.5px;font-weight:500;margin-bottom:6px}
.kpi .value{font-size:22px;font-weight:600;letter-spacing:-0.5px;color:var(--text)}
.kpi .value.muted{color:var(--text3);font-size:14px;font-weight:500}
.kpi .value .unit{font-size:12px;color:var(--text2);font-weight:400;margin-left:3px}
.kpi.highlight{border-color:var(--accent);background:linear-gradient(135deg,var(--bg2) 0%,rgba(88,166,255,0.06) 100%)}
.kpi.danger{border-color:var(--red);background:linear-gradient(135deg,var(--bg2) 0%,rgba(248,81,73,0.05) 100%)}
.kpi .na-tag{display:inline-block;background:rgba(210,153,34,0.15);color:var(--yellow);
             font-size:9px;padding:1px 5px;border-radius:3px;margin-left:6px;font-weight:600}
/* Info icon + popover */
.info-icon{display:inline-flex;align-items:center;justify-content:center;
           width:14px;height:14px;border-radius:50%;background:var(--bg3);
           color:var(--text2);font-size:9px;font-weight:700;cursor:help;margin-left:5px;
           border:1px solid var(--border);transition:all .15s;font-style:italic;font-family:Georgia,serif;
           user-select:none;flex-shrink:0;vertical-align:middle}
.info-icon:hover{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.info-icon.active{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.info-popover{position:fixed;z-index:9999;max-width:380px;background:var(--bg3);
              border:1px solid var(--accent);border-radius:8px;padding:14px 16px;
              box-shadow:0 8px 24px rgba(0,0,0,0.5);font-size:12px;line-height:1.55;
              color:var(--text);display:none}
.info-popover.show{display:block}
.info-popover .ip-title{font-weight:600;font-size:13px;color:var(--accent);margin-bottom:8px}
.info-popover .ip-source{color:var(--text2);font-size:11px;margin-top:8px;padding-top:8px;
                          border-top:1px solid var(--border);font-style:italic}
.info-popover .ip-source code{background:var(--bg);padding:1px 5px;border-radius:3px;
                                font-size:10px;color:var(--cyan);font-family:'SF Mono',Menlo,monospace}
.info-popover code{background:var(--bg);padding:1px 5px;border-radius:3px;font-size:10px;
                    color:var(--accent);font-family:'SF Mono',Menlo,monospace}
.charts-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px;margin-bottom:20px}
.chart-card{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:16px}
.chart-card h3{font-size:13px;font-weight:600;margin-bottom:4px}
.chart-card .desc{font-size:11px;color:var(--text2);margin-bottom:12px}
.chart-card .chart-wrap{position:relative;height:280px}
.chart-card.tall .chart-wrap{height:340px}
.chart-card .caret{display:inline-block;transition:transform .2s;color:var(--text2);font-size:11px;width:12px}
.chart-card.collapsed .caret{transform:rotate(-90deg)}
.chart-card.collapsed .chart-wrap,.chart-card.collapsed .desc{display:none}
.span-12{grid-column:span 12}.span-8{grid-column:span 8}.span-6{grid-column:span 6}.span-4{grid-column:span 4}
@media(max-width:1100px){.span-8,.span-6,.span-4{grid-column:span 12}}
.kpi-table{width:100%;border-collapse:collapse;font-size:12px}
.kpi-table th,.kpi-table td{padding:8px;text-align:right;border-bottom:1px solid var(--border)}
.kpi-table th:first-child,.kpi-table td:first-child{text-align:left;color:var(--text2)}
.kpi-table th{font-size:11px;text-transform:uppercase;background:var(--bg3);color:var(--text2);font-weight:500}
.kpi-table tr.total td{background:var(--bg3);font-weight:600;color:var(--text)}
.kpi-table tr.section td{background:rgba(88,166,255,0.06);color:var(--accent);font-weight:600;font-size:11px;text-transform:uppercase}
.kpi-table td.pos{color:var(--green)}.kpi-table td.neg{color:var(--red)}.kpi-table td.na{color:var(--text3);font-style:italic}
.alerts{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:12px;margin-bottom:20px}
.alert{background:var(--bg2);border-left:4px solid;padding:14px 16px;border-radius:6px;display:flex;gap:12px;align-items:flex-start}
.alert.critical{border-color:var(--red);background:rgba(248,81,73,0.06)}
.alert.warn{border-color:var(--yellow);background:rgba(210,153,34,0.06)}
.alert.info{border-color:var(--cyan);background:rgba(57,197,207,0.06)}
.alert .icon{font-size:18px;line-height:1;flex-shrink:0}
.alert .body strong{display:block;margin-bottom:3px;font-weight:600;font-size:13px}
.alert .body p{color:var(--text2);font-size:12px;line-height:1.5}
.recs{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:14px;margin-bottom:24px;margin-top:20px}
.rec{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:16px}
.rec h4{font-size:13px;font-weight:600;color:var(--accent);margin-bottom:8px}
.rec p{font-size:12px;color:var(--text2);line-height:1.6}
.rec ul{margin-top:8px;padding-left:18px;color:var(--text2);font-size:12px}
.rec li{margin-bottom:4px}