:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --border: #d8dee4;
  --text: #1f2328;
  --muted: #656d76;
  --accent: #c62828;
  --primary: #1f2328;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif; background: var(--bg); color: var(--text); }
.topbar { display: flex; align-items: center; gap: 18px; padding: 14px 22px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; }
.brand { font-size: 20px; font-weight: 800; }
.brand span { color: var(--accent); }
.tabs { display: flex; gap: 6px; flex: 1; }
.tab { border: 1px solid transparent; background: transparent; padding: 8px 14px; border-radius: 8px; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer; }
.tab.active { background: var(--primary); color: #fff; }
.tab:disabled { opacity: .45; cursor: not-allowed; }
.updated { font-size: 12px; color: var(--muted); }
.view { max-width: 1080px; margin: 22px auto; padding: 0 18px; display: flex; flex-direction: column; gap: 16px; }
.hidden { display: none; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; }
.card h2 { font-size: 15px; letter-spacing: .4px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .row { grid-template-columns: 1fr; } }
.meter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.meter { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.meter .name { font-weight: 700; font-size: 14px; }
.meter .value { font-size: 20px; font-weight: 800; margin-top: 4px; }
.meter .sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.meter .est { color: var(--accent); font-weight: 700; }
.unavail { color: var(--muted); }
.rowline { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px dashed #e6eaee; font-size: 14px; }
.rowline:last-child { border-bottom: 0; }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 8px; }
.dot.ok { background: #2da44e; }
.dot.bad { background: var(--accent); }
.alert-bad { color: var(--accent); font-weight: 600; }
.muted { color: var(--muted); font-size: 14px; }
.loading { color: var(--muted); font-size: 14px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 18px 0 26px; }