:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --wash: rgba(11, 11, 11, 0.04);
  --series-1: #2a78d6;
  --series-1-strong: #184f95;
  --series-2: #eb6834;
  --good: #006300;
  --bad: #d03b3b;
  --accent: #2a78d6;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --wash: rgba(255, 255, 255, 0.05);
    --series-1: #3987e5;
    --series-1-strong: #86b6ef;
    --series-2: #d95926;
    --good: #0ca30c;
    --bad: #e66767;
    --accent: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.1);
  --wash: rgba(255, 255, 255, 0.05);
  --series-1: #3987e5;
  --series-1-strong: #86b6ef;
  --series-2: #d95926;
  --good: #0ca30c;
  --bad: #e66767;
  --accent: #3987e5;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--ink); font-size: 14px; line-height: 1.45; }
h1, h2, h3 { margin: 0; font-weight: 600; }
h2 { font-size: 17px; margin-bottom: 12px; }
h3, figcaption { font-size: 14px; font-weight: 600; margin-bottom: 10px; }
.muted { color: var(--muted); font-weight: 400; }

/* top bar */
.topbar { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; padding: 14px 24px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand h1 { font-size: 18px; }
.brand span { color: var(--ink-2); }
.controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.field { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-2); }
select, input[type="password"] { font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--axis); border-radius: 6px; padding: 6px 8px; max-width: 100%; }
#report { max-width: min(420px, 70vw); }
.button, button { font: inherit; display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 6px; border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; }
.button.ghost { background: transparent; color: var(--ink-2); border-color: var(--axis); }
.button:hover, button:hover { filter: brightness(1.08); }

main { max-width: 1280px; margin: 0 auto; padding: 20px 24px 64px; }
section { margin-top: 28px; }
.subhead { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; justify-content: space-between; }
.subhead p { margin: 0; }
.status { padding: 12px 14px; border-radius: 8px; background: var(--surface); border: 1px solid var(--border); color: var(--ink-2); }
.status.error { border-color: var(--bad); color: var(--ink); }
.hint { margin: 8px 0 0; font-size: 13px; }

/* stat tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.tile-label { color: var(--ink-2); font-size: 13px; }
.tile-value { font-size: 26px; font-weight: 600; margin-top: 2px; }
.tile-sub { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.delta { font-weight: 600; white-space: nowrap; }
.delta.good { color: var(--good); }
.delta.bad { color: var(--bad); }
.delta.flat { color: var(--ink-2); }

/* cards and charts */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 460px), 1fr)); gap: 16px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); align-items: start; }
.card { margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px; min-width: 0; }
.chart { position: relative; width: 100%; min-height: 40px; }
.chart svg { display: block; overflow: visible; }
.legend { display: flex; gap: 16px; font-size: 12.5px; color: var(--ink-2); margin: -4px 0 8px; }
.legend i { display: inline-block; width: 12px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .axis { stroke: var(--axis); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .tick-sel { fill: var(--ink); font-weight: 600; }
.chart .value { fill: var(--ink-2); font-size: 12px; font-variant-numeric: tabular-nums; }
.chart .bar { fill: var(--series-1); }
.chart .bar-sel { fill: var(--series-1-strong); }
.chart .line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .dot { stroke: var(--surface); stroke-width: 2; }
.chart .hit { fill: transparent; }
.chart .crosshair { stroke: var(--axis); stroke-width: 1; }
.chart .sel-line { stroke: var(--grid); stroke-width: 10; opacity: 0.8; }
.tip { position: absolute; pointer-events: none; z-index: 3; background: var(--surface); color: var(--ink); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 12.5px; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12); white-space: nowrap; }
.tip-title { font-weight: 600; margin-bottom: 2px; }
.tip-row { display: flex; align-items: center; gap: 6px; }
.tip-row b { margin-left: auto; padding-left: 12px; font-variant-numeric: tabular-nums; }
.swatch { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

/* tables */
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.card .table-wrap { border: 0; border-radius: 0; max-height: 520px; overflow-y: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { padding: 7px 10px; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--grid); }
thead th { position: sticky; top: 0; background: var(--surface); color: var(--ink-2); font-weight: 600; border-bottom: 1px solid var(--axis); z-index: 1; }
tbody th { font-weight: 500; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
tfoot th, tfoot td { font-weight: 600; border-top: 1px solid var(--axis); border-bottom: 0; }
tr.group th, tr.group td { background: var(--wash); font-weight: 600; }
tr.pickable { cursor: pointer; }
tr.pickable:hover { background: var(--wash); }
tr.selected { background: var(--wash); box-shadow: inset 3px 0 0 var(--accent); }
.empty { padding: 12px; color: var(--muted); margin: 0; }

/* sign-in */
body.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 28px; display: grid; gap: 10px; }
.login-card h1 { font-size: 20px; margin-bottom: 8px; }
.login-card label { color: var(--ink-2); }
.login-card button { justify-content: center; margin-top: 6px; padding: 8px 12px; }
.error { color: var(--bad); margin: 0; }

@media (max-width: 640px) {
  .topbar { padding: 12px 16px; position: static; }
  main { padding: 16px 16px 48px; }
  .tile-value { font-size: 22px; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
}