:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --ring: rgba(11, 11, 11, 0.10);
  --wash: rgba(11, 11, 11, 0.04);
  --whale: #2a78d6;            /* categorical slot 1 */
  --insider: #eb6834;          /* categorical slot 2 */
  --pos: #2a78d6;              /* diverging: accumulation */
  --neg: #e34948;              /* diverging: distribution */
  --link: #1c5cab;
  --note-bg: #fbf3e4;
  --note-ink: #5c4300;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #9a9890;
    --grid: #2c2c2a;
    --axis: #383835;
    --ring: rgba(255, 255, 255, 0.10);
    --wash: rgba(255, 255, 255, 0.05);
    --whale: #3987e5;
    --insider: #d95926;
    --pos: #3987e5;
    --neg: #e66767;
    --link: #86b6ef;
    --note-bg: #2a2416;
    --note-ink: #f0d79a;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #9a9890;
  --grid: #2c2c2a;
  --axis: #383835;
  --ring: rgba(255, 255, 255, 0.10);
  --wash: rgba(255, 255, 255, 0.05);
  --whale: #3987e5;
  --insider: #d95926;
  --pos: #3987e5;
  --neg: #e66767;
  --link: #86b6ef;
  --note-bg: #2a2416;
  --note-ink: #f0d79a;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--link); }
a:focus-visible, button:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--whale); outline-offset: 2px;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

header.top { border-bottom: 1px solid var(--ring); background: var(--surface); }
header.top .wrap { display: flex; align-items: center; gap: 20px; height: 56px; }
.brand { font-weight: 650; font-size: 17px; color: var(--ink); text-decoration: none; }
nav.main { display: flex; gap: 16px; flex: 1; }
nav.main a { color: var(--ink-2); text-decoration: none; font-size: 14px; }
nav.main a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.theme-btn {
  border: 1px solid var(--ring); background: transparent; color: var(--ink-2);
  border-radius: 6px; padding: 4px 10px; font: inherit; font-size: 13px; cursor: pointer;
}

main { padding: 28px 0 48px; }
h1 { font-size: 26px; line-height: 1.25; margin: 0 0 6px; font-weight: 650; }
h2 { font-size: 17px; margin: 0 0 4px; font-weight: 620; }
.lede { color: var(--ink-2); margin: 0 0 22px; max-width: 70ch; }
.sub { color: var(--muted); font-size: 13px; margin: 0 0 12px; }

.filters { display: flex; gap: 10px; align-items: center; margin: 0 0 16px; flex-wrap: wrap; }
.filters label { color: var(--ink-2); font-size: 13px; }
.seg { display: inline-flex; border: 1px solid var(--ring); border-radius: 8px; overflow: hidden; }
.seg button {
  border: 0; background: transparent; color: var(--ink-2); padding: 5px 12px;
  font: inherit; font-size: 13px; cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--ring); }
.seg button[aria-pressed="true"] { background: var(--wash); color: var(--ink); font-weight: 600; }

.card {
  background: var(--surface); border: 1px solid var(--ring); border-radius: 12px;
  padding: 18px 18px 14px; margin: 0 0 16px;
}
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.link-btn {
  background: none; border: 0; padding: 0; color: var(--link); font: inherit; font-size: 13px;
  cursor: pointer; white-space: nowrap;
}

/* tables */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-weight: 550; color: var(--muted); font-size: 12px; padding: 8px 10px;
     border-bottom: 1px solid var(--grid); white-space: nowrap; }
td { padding: 9px 10px; border-bottom: 1px solid var(--grid); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tbody tr.row-link { cursor: pointer; }
tbody tr.row-link:hover { background: var(--wash); }
.sym { font-weight: 620; color: var(--ink); text-decoration: none; }
.addr { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 13px; }
.tag {
  display: inline-block; font-size: 11px; color: var(--ink-2); border: 1px solid var(--ring);
  border-radius: 999px; padding: 0 7px; margin-left: 6px; white-space: nowrap;
}
.reason { color: var(--ink-2); font-size: 13px; }
.delta { white-space: nowrap; }
.delta .glyph { font-size: 10px; margin-right: 3px; color: var(--muted); }
.breadth { color: var(--ink-2); white-space: nowrap; }
.na { color: var(--muted); }

/* stats */
.hero { margin: 4px 0 18px; }
.hero .value { font-size: 52px; font-weight: 650; line-height: 1.05; }
.hero .label { color: var(--ink-2); }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 0 0 16px; }
.tile { background: var(--surface); border: 1px solid var(--ring); border-radius: 12px; padding: 14px 16px; }
.tile .label { color: var(--ink-2); font-size: 13px; }
.tile .value { font-size: 24px; font-weight: 620; margin-top: 2px; }
.tile .foot { color: var(--muted); font-size: 12px; margin-top: 2px; }

.note {
  background: var(--note-bg); color: var(--note-ink); border-radius: 10px;
  padding: 10px 14px; font-size: 14px; margin: 0 0 16px;
}
.note p { margin: 4px 0; }

/* charts */
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .baseline { stroke: var(--axis); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .endlabel { fill: var(--ink-2); font-size: 12px; }
.chart .crosshair { stroke: var(--axis); stroke-width: 1; }
.legend { display: flex; gap: 16px; font-size: 13px; color: var(--ink-2); margin: 6px 0 4px; flex-wrap: wrap; }
.legend .key { display: inline-block; width: 14px; height: 2px; vertical-align: middle; margin-right: 6px; border-radius: 2px; }
.legend .swatch { display: inline-block; width: 10px; height: 10px; vertical-align: -1px; margin-right: 6px; border-radius: 2px; }
.tooltip {
  position: absolute; pointer-events: none; background: var(--surface); border: 1px solid var(--ring);
  border-radius: 8px; padding: 8px 10px; font-size: 12px; box-shadow: 0 4px 16px rgba(0,0,0,.12);
  min-width: 150px; z-index: 5; display: none;
}
.tooltip .t-date { color: var(--muted); margin-bottom: 4px; }
.tooltip .t-row { display: flex; align-items: center; gap: 8px; }
.tooltip .t-row strong { font-variant-numeric: tabular-nums; }
.tooltip .t-key { width: 12px; height: 2px; border-radius: 2px; }
.tooltip .t-name { color: var(--ink-2); }
.spark { display: block; }

footer { border-top: 1px solid var(--ring); color: var(--muted); font-size: 13px; padding: 20px 0 40px; }
footer p { margin: 4px 0; max-width: 80ch; }

/* methodology */
.prose { max-width: 72ch; }
.prose h1 { margin-bottom: 14px; }
.prose h2 { margin-top: 28px; font-size: 19px; }
.prose code { font-size: 13px; background: var(--wash); padding: 1px 5px; border-radius: 4px; }
.prose li { margin: 4px 0; }

@media (max-width: 640px) {
  h1 { font-size: 22px; }
  .hero .value { font-size: 44px; }
  .hide-sm { display: none; }
  header.top .wrap { gap: 10px; }
  nav.main { gap: 12px; }
  nav.main a { font-size: 13px; }
  .brand { font-size: 16px; }
  .theme-btn { padding: 4px 8px; font-size: 0; }
  .theme-btn::before { content: "◐"; font-size: 15px; }
}

/* overview highlight cards */
.highlights { margin-top: -6px; }
a.tile-link { text-decoration: none; color: inherit; display: block; }
a.tile-link:hover { border-color: var(--axis); }
a.tile-link .value { font-size: 20px; }

/* about page */
.prose ul li { margin: 10px 0; }
.prose ul li strong { color: var(--ink); }