: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);
  --link: #1c5cab;
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --header-from: #014d5d;
  --header-to: #0d366b;
  --header-ink: #ffffff;
  --header-ink-2: #cde2fb;
  --shadow: 0 6px 20px rgba(11, 11, 11, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    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);
    --link: #86b6ef;
    --series-1: #3987e5;
    --series-2: #d95926;
    --header-from: #013642;
    --header-to: #0a2a52;
    --shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

h1,
h2,
h3 {
  line-height: 1.25;
  font-weight: 650;
}

h2 {
  font-size: 1.5rem;
  margin: 3.5rem 0 0.75rem;
}

h3 {
  font-size: 1.05rem;
  margin: 0;
}

.site-header {
  background: linear-gradient(135deg, var(--header-from), var(--header-to));
  color: var(--header-ink);
  padding: 3.5rem 16px 3rem;
}

.site-header > div,
.site-footer > div {
  max-width: 46rem;
  margin: 0 auto;
}

main {
  max-width: calc(46rem + 32px);
  margin: 0 auto;
}

.kicker {
  margin: 0 0 0.5rem;
  color: var(--header-ink-2);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.site-header h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
}

.site-header p {
  margin: 0 0 1rem;
}

.site-header a {
  color: var(--header-ink);
}

.lede {
  font-size: 1.1rem;
}

main {
  padding: 0 16px 4rem;
}

.jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.95rem;
}

.chart {
  margin: 1.75rem -16px;
  padding: 1.25rem 16px 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

@media (min-width: 52rem) {
  .chart {
    margin-left: -3rem;
    margin-right: -3rem;
    padding: 1.5rem 1.5rem 1.25rem;
  }
}

.chart-sub {
  margin: 0.25rem 0 0;
  color: var(--ink-2);
  font-size: 0.9rem;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-2);
  font-size: 0.85rem;
}

.legend li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.key-line {
  width: 18px;
  height: 2px;
  border-radius: 1px;
}

.key-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.key-1 {
  background: var(--series-1);
}

.key-2 {
  background: var(--series-2);
}

.chart-plot {
  position: relative;
  margin-top: 0.75rem;
}

.chart-svg svg {
  display: block;
  overflow: visible;
  touch-action: pan-y;
}

.chart-svg svg:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 4px;
  border-radius: 4px;
}

.chart-grid line {
  stroke: var(--grid);
  stroke-width: 1;
}

.chart-axis {
  stroke: var(--axis);
  stroke-width: 1;
}

.chart-tick {
  fill: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.chart-unit {
  fill: var(--ink-2);
  font-size: 12px;
}

.chart-line {
  fill: none;
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.chart-band {
  opacity: 0.14;
}

.chart-dot {
  stroke: var(--surface);
  stroke-width: 2;
}

.chart-crosshair {
  stroke: var(--ink-2);
  stroke-width: 1;
}

.chart-marker {
  stroke: var(--axis);
  stroke-width: 1;
}

.chart-reference {
  stroke: var(--ink-2);
  stroke-width: 1;
  opacity: 0.6;
}

.chart-label,
.chart-end-label {
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 4px;
  stroke-linejoin: round;
}

.chart-label {
  fill: var(--ink-2);
  font-size: 12px;
}

.chart-end-label {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.chart-focus-ring {
  fill: none;
  stroke: var(--ink);
  stroke-width: 2;
}

.chart-tooltip {
  position: absolute;
  z-index: 1;
  min-width: 9rem;
  padding: 0.5rem 0.65rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  font-size: 0.82rem;
  line-height: 1.4;
  pointer-events: none;
}

.chart-tooltip-title {
  color: var(--ink-2);
  margin-bottom: 0.2rem;
}

.chart-tooltip-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.chart-tooltip-key {
  width: 12px;
  height: 2px;
  flex: none;
}

.chart-tooltip-label {
  color: var(--ink-2);
}

.chart-foot {
  margin: 0.75rem 0 0;
  color: var(--ink-2);
  font-size: 0.85rem;
}

.chart details {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.chart summary {
  cursor: pointer;
  color: var(--link);
}

.chart-table-scroll {
  max-height: 20rem;
  overflow: auto;
  margin-top: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 0.3rem 0.75rem;
  text-align: right;
  border-bottom: 1px solid var(--grid);
}

thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--ink-2);
  font-weight: 600;
}

tbody th {
  font-weight: 400;
}

.formula {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.95em;
  white-space: nowrap;
}

.changes li,
.sources li {
  margin-bottom: 0.6rem;
}

.sources {
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 16px 3rem;
  color: var(--ink-2);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0 0 0.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}