:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --header: #0b0b0b;
  --header-text: #ffffff;
  --accent: #2a78d6;
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100; --s5: #e87ba4;
  --good: #0ca30c; --warning: #fab219; --serious: #ec835a; --critical: #d03b3b;
  --good-text: #006300; --bad-text: #b02a2a;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d; --surface: #1a1a19; --text: #ffffff; --text-2: #c3c2b7; --muted: #898781;
    --grid: #2c2c2a; --axis: #383835; --border: rgba(255, 255, 255, 0.10);
    --header: #000000; --accent: #3987e5;
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181;
    --good-text: #0ca30c; --bad-text: #e66767;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --text: #ffffff; --text-2: #c3c2b7; --muted: #898781;
  --grid: #2c2c2a; --axis: #383835; --border: rgba(255, 255, 255, 0.10);
  --header: #000000; --accent: #3987e5;
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181;
  --good-text: #0ca30c; --bad-text: #e66767;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--page); color: var(--text); font-size: 14px; line-height: 1.45; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  background: var(--header); color: var(--header-text);
  padding: 10px 24px; position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: baseline; gap: 10px; color: inherit; text-decoration: none; }
.logo { font-family: Impact, "Arial Black", system-ui, sans-serif; font-size: 24px; letter-spacing: 1px; }
.brand-sub { font-size: 12px; opacity: .7; }
.tabs { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.tab {
  background: transparent; color: rgba(255,255,255,.72); border: 0; border-radius: 6px;
  padding: 8px 12px; font: inherit; font-weight: 500; cursor: pointer;
}
.tab:hover { background: rgba(255,255,255,.08); color: #fff; }
.tab[aria-selected="true"] { background: rgba(255,255,255,.14); color: #fff; }
.icon-btn {
  background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.25); border-radius: 6px;
  width: 34px; height: 34px; display: grid; place-items: center; cursor: pointer;
}

/* ---------- filters ---------- */
.filters {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px;
  padding: 12px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 54px; z-index: 9;
}
.filters label { display: flex; align-items: center; gap: 6px; color: var(--text-2); font-size: 13px; }
.filters select {
  font: inherit; color: var(--text); background: var(--page); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 8px; min-width: 110px;
}
.link-btn { background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 4px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

/* ---------- layout ---------- */
main { padding: 20px 24px 40px; max-width: 1440px; margin: 0 auto; }
.page { display: grid; gap: 16px; }
.page[hidden] { display: none; }
.grid { display: grid; gap: 16px; }
.g-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 960px) { .g-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; min-width: 0;
}
.card header { margin-bottom: 10px; }
.card h2 { font-size: 15px; font-weight: 600; margin: 0; }
.q { margin: 2px 0 0; color: var(--text-2); font-size: 12px; }
.chart-box { position: relative; height: 290px; }
.chart-box.tall { height: 360px; }

/* ---------- KPI tiles ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; }
.kpi {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; display: flex; flex-direction: column; gap: 4px;
}
.kpi .label { color: var(--text-2); font-size: 13px; }
.kpi .value { font-size: 28px; font-weight: 600; letter-spacing: -.3px; }
.kpi .delta { font-size: 12px; color: var(--text-2); }
.kpi .delta.up-good, .kpi .delta.down-good { color: var(--good-text); }
.kpi .delta.up-bad, .kpi .delta.down-bad { color: var(--bad-text); }
.kpi .hint { font-size: 11px; color: var(--muted); }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; }
.tbl { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
.tbl th { color: var(--text-2); font-weight: 500; font-size: 12px; white-space: nowrap; }
.tbl td.num, .tbl th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl tbody tr:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.status { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; white-space: nowrap; }
.status .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.status.critical .dot { background: var(--critical); }
.status.warning .dot { background: var(--warning); }
.status.good .dot { background: var(--good); }
.flags { color: var(--text-2); font-size: 12px; min-width: 200px; }
.prose { color: var(--text-2); max-width: 90ch; margin: 0; }
code { font-size: 12px; background: var(--page); padding: 1px 4px; border-radius: 4px; }
.empty-state {
  height: 100%; min-height: 160px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px; color: var(--muted); border: 1px dashed var(--grid); border-radius: 8px; text-align: center; padding: 16px;
}
.empty-state span:first-of-type { color: var(--text-2); font-weight: 500; }
.filters select:disabled, .link-btn:disabled { opacity: .5; cursor: not-allowed; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

@media (max-width: 640px) {
  .topbar { padding: 10px 16px; gap: 10px; position: static; }
  .filters { padding: 10px 16px; position: static; }
  main { padding: 16px; }
  .kpi .value { font-size: 24px; }
}
@media print {
  .topbar, .filters { position: static; }
  .page[hidden] { display: grid !important; }
}