:root {
  --paper: #ffffff;
  --ink: #111111;
  --ink-2: #555555;
  --ink-3: #767676;
  --rule: #111111;
  --rule-soft: #e2e2e2;
  --wash: #f4f4f2;
  --blue: #1f3fd9;
  --hue: #c2410c;
  --sans: "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 var(--sans);
}
a { color: var(--blue); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  grid-template-areas:
    "head main"
    "side main"
    "side below";
  grid-template-rows: auto auto 1fr;
  column-gap: 32px;
  max-width: 1500px;
  margin: 0 auto;
  padding: 24px 24px 48px;
}
.head { grid-area: head; border-top: 3px solid var(--hue); padding-top: 14px; }
.main { grid-area: main; min-width: 0; }
.side { grid-area: side; }
.below { grid-area: below; min-width: 0; max-width: 820px; }

h1 { font-size: 28px; line-height: 1.15; font-weight: 700; margin: 0 0 12px; letter-spacing: -0.01em; }
.lede { margin: 0 0 20px; color: var(--ink); font-size: 16px; }
h2 { font-size: 17px; font-weight: 700; margin: 28px 0 8px; }

.chart-block + .chart-block { margin-top: 18px; }
.chart-h { margin: 0; font-size: 16px; }
.chart-sub { margin: 2px 0 6px; color: var(--ink-2); font-size: 13.5px; }
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; overflow: visible; }

.legend { display: flex; flex-wrap: wrap; gap: 4px 6px; margin: 0 0 4px; }
.legend button {
  font: inherit; font-size: 13px; line-height: 1.2;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 8px; border: 1px solid var(--rule-soft); border-radius: 2px;
  background: var(--paper); color: var(--ink); cursor: pointer;
}
.legend button[aria-pressed="false"] { color: var(--ink-3); background: var(--wash); }
.legend button[aria-pressed="false"] .sw { opacity: 0.3; }
.sw { display: inline-block; width: 14px; height: 0; border-top: 3px solid currentColor; }
.sw.dash { border-top-style: dashed; }

.controls { border-top: 1px solid var(--rule); padding-top: 12px; }
.control { margin-bottom: 14px; }
.control-label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 4px; }
.seg { display: inline-flex; border: 1px solid var(--ink); }
.seg button {
  font: inherit; font-size: 14px; padding: 6px 12px; border: 0; background: var(--paper); color: var(--ink); cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.checks label { display: flex; align-items: center; gap: 8px; font-size: 14px; margin: 4px 0; cursor: pointer; }
.ev-key { display: inline-block; width: 0; height: 16px; border-left: 2px solid var(--ink-2); }
.ev-key-ai { border-left: 2px dashed var(--hue); }

.reading { border-top: 1px solid var(--rule); margin-top: 6px; }
.reading h2 { margin-top: 14px; font-size: 15px; }
.reading p, .reading li { font-size: 14.5px; }
.reading p { margin: 0 0 10px; }
.caveats { padding-left: 18px; margin: 0; }
.caveats li { margin-bottom: 8px; }
.num { font-variant-numeric: tabular-nums; }

.below h2 { border-top: 1px solid var(--rule); padding-top: 12px; }
.note { color: var(--ink-2); font-size: 14px; }
.events { list-style: none; padding: 0; margin: 0; }
.events li { display: grid; grid-template-columns: 28px 1fr; gap: 0 10px; padding: 10px 0; border-bottom: 1px solid var(--rule-soft); font-size: 14.5px; }
.events .n { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--ink-2); padding-top: 1px; }
.events .ai .n { color: var(--hue); }
.events .t { font-weight: 700; }
.events .d { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.events .kind { font-size: 12.5px; color: var(--ink-2); border: 1px solid var(--rule-soft); padding: 0 5px; margin-left: 6px; white-space: nowrap; }
.events .ai .kind { border-color: var(--hue); color: var(--hue); }
.events .src { color: var(--ink-2); font-size: 13.5px; }
.events .off { opacity: 0.45; }
.sources { padding-left: 18px; font-size: 14.5px; }
.sources li { margin-bottom: 8px; overflow-wrap: anywhere; }
.colophon { margin-top: 20px; }

/* chart text */
.ax text { font-size: 11.5px; fill: var(--ink-2); font-variant-numeric: tabular-nums; }
.ax line { stroke: var(--rule-soft); }
.ax .base { stroke: var(--ink); stroke-width: 1; }
.ev-lab { font-size: 11.5px; }
.end-lab { font-size: 12px; }
.band-lab { font-size: 12px; fill: var(--ink-2); }

.tip {
  position: fixed; z-index: 30; pointer-events: none;
  background: var(--paper); border: 1px solid var(--ink); padding: 8px 10px;
  font-size: 13px; line-height: 1.35; max-width: 290px; box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}
.tip .tm { font-weight: 700; margin-bottom: 4px; }
.tip table { border-collapse: collapse; }
.tip td { padding: 1px 0; vertical-align: baseline; }
.tip td + td { padding-left: 10px; text-align: right; font-variant-numeric: tabular-nums; }
.tip .ev { margin-top: 6px; padding-top: 6px; border-top: 1px solid var(--rule-soft); }
.tip .ev-ai { color: var(--hue); font-weight: 700; }

@media (max-width: 860px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "head" "main" "side" "below";
    grid-template-rows: auto;
    padding: 16px 16px 40px;
  }
  h1 { font-size: 24px; }
  .side { margin-top: 20px; }
}