:root {
  color-scheme: light;
  --bg: #f6f5f1;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --border: #dedcd4;
  --text: #0b0b0b;
  --text-2: #52514e;
  --text-3: #898781;
  --accent: #2a78d6;
  --accent-soft: #e2edfa;
  --raise: #2a78d6;
  --lower: #e34948;
  --neutral: #c3c2b7;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #121211;
    --surface: #1a1a19;
    --surface-2: #242423;
    --border: #35342f;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --text-3: #898781;
    --accent: #3987e5;
    --accent-soft: #1d2f47;
    --raise: #3987e5;
    --lower: #e66767;
    --neutral: #52514e;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #121211;
  --surface: #1a1a19;
  --surface-2: #242423;
  --border: #35342f;
  --text: #ffffff;
  --text-2: #c3c2b7;
  --text-3: #898781;
  --accent: #3987e5;
  --accent-soft: #1d2f47;
  --raise: #3987e5;
  --lower: #e66767;
  --neutral: #52514e;
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.45;
}
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

.site-header { padding: 32px 0 20px; }
.site-header h1 { margin: 0 0 8px; font-size: 1.9rem; letter-spacing: -0.01em; }
.lede { margin: 0; color: var(--text-2); max-width: 64ch; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 24px;
  padding-bottom: 64px;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .results { order: -1; }
}

h2 { font-size: 1.15rem; margin: 0; }
h3 { font-size: 1rem; margin: 20px 0 4px; }
.hint { color: var(--text-3); font-size: 0.85rem; margin: 6px 0 12px; }
small { display: block; color: var(--text-3); font-weight: 400; font-size: 0.78rem; margin-top: 1px; }

.inputs-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.sample-picker { font-size: 0.85rem; color: var(--text-2); display: flex; align-items: center; gap: 8px; }
.sample-picker select { max-width: 280px; }

fieldset.block {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 12px 16px 16px;
  margin: 0 0 14px;
  transition: opacity 0.15s;
}
fieldset.block.masked { opacity: 0.55; }
fieldset.block.masked label:not(.switch) { pointer-events: none; }
legend {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 6px;
  font-weight: 600;
}
.block-name { font-size: 0.95rem; }
.switch { display: inline-flex; align-items: center; gap: 6px; font-weight: 400; font-size: 0.8rem; color: var(--text-2); cursor: pointer; }
.switch input { accent-color: var(--accent); width: 16px; height: 16px; margin: 0; }

label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--text-2); margin-top: 10px; }
input[type="text"], input[type="number"], select, textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 7px 9px;
  font: inherit;
  font-size: 0.92rem;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
}
textarea { resize: vertical; font-family: var(--font); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
@media (max-width: 480px) { .grid2 { grid-template-columns: 1fr; } }

.results { position: sticky; top: 16px; align-self: start; }
.results-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px 20px;
}
.status { color: var(--text-3); }
.status.error { color: var(--lower); }
.result-label { margin: 0; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-3); }
.range { margin: 4px 0 0; font-size: 1.75rem; font-weight: 700; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.mid { margin: 2px 0 14px; color: var(--text-2); font-size: 0.9rem; }
.mid strong { color: var(--text); font-variant-numeric: tabular-nums; }
.truth { margin-left: 10px; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--text); font-size: 0.8rem; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0; }
.stats div { background: var(--surface-2); border-radius: 8px; padding: 10px 12px; }
.stats dt { font-size: 0.72rem; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; }
.stats dd { margin: 2px 0 0; font-size: 1.15rem; font-weight: 600; font-variant-numeric: tabular-nums; }

.attribution { max-width: 360px; }
.attribution svg { width: 100%; height: auto; display: block; overflow: visible; }
.attribution text { font-family: var(--font); font-size: 12px; fill: var(--text-2); }
.attribution .value { fill: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
.attribution .axis { stroke: var(--neutral); stroke-width: 1; }
.attribution .grid { stroke: var(--border); stroke-width: 1; }
.attribution .bar.raise { fill: var(--raise); }
.attribution .bar.lower { fill: var(--lower); }
.attribution .bar.masked { fill: var(--neutral); }
.attribution .hit { fill: transparent; }
.attribution .hit:hover + .bar, .attribution .row:hover .bar { opacity: 0.85; }

.notes { margin: 16px 0 0; padding-left: 18px; color: var(--text-2); font-size: 0.85rem; }
.notes li { margin: 4px 0; }

.about { margin-top: 14px; color: var(--text-2); font-size: 0.85rem; }
.about summary { cursor: pointer; font-weight: 600; color: var(--text); }
.about a { color: var(--accent); }

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