:root {
  color-scheme: light;
  --paper: #fff; --surface: #fff; --ink: #262626; --muted: #555;
  --rule: #ddd; --hi: #e74c3c; --lo: #2980b9; --prec: #1f77b4;
  --font: -apple-system, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 13px; line-height: 1.4; }
button, input { font: inherit; }
a { color: #2471a3; }
button { cursor: pointer; padding: 3px 8px; color: #333; background: #f5f5f5; border: 1px solid #bbb; border-radius: 2px; font-size: 12px; }
button:disabled { cursor: wait; opacity: .5; }
button:hover:not(:disabled) { background: #e9e9e9; }
:focus-visible { outline: 2px solid #2471a3; outline-offset: 3px; }
[hidden] { display: none !important; }
.workspace { width: 100%; padding: 0 18px 16px; }
.masthead { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: 0 -18px; padding: 10px 18px 4px; background: #fafafa; }
.eyebrow { margin: 0 0 3px; color: #555; font-size: 12px; }
.eyebrow span { margin-left: 10px; }
h1 { margin: 0; font-size: 16px; font-weight: 600; }
.header-meta { display: flex; gap: 16px; align-items: center; font-size: 12px; }
.status-wrap { color: #666; }
[data-state=error] { color: #b00; }
.controls { margin: 0 -18px; padding: 8px 18px; background: #fafafa; border-bottom: 1px solid #ddd; }
fieldset { min-width: 0; border: 0; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.control { min-width: 0; }
.control-label { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.control-label label { font-size: 13px; }
output { font-weight: 600; color: #b3541e; font-size: 13px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.control-lo output, .control-lo .direction { color: #2471a3; }
.control-hi output, .control-hi .direction { color: #c0392b; }
input[type=range] { display: block; width: 100%; height: 20px; margin: 4px 0 0; cursor: pointer; }
input[type=range]:disabled { cursor: wait; }
.range-labels { display: flex; justify-content: space-between; font-size: 11px; color: #666; }
.controls-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 6px; color: #555; font-size: 12px; }
.controls-foot p, .record-caption p { margin: 0; }
.controls-foot strong { font-weight: 400; }
.section-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 12px 0 0; }
h2 { margin: 0; font-size: 13.5px; font-weight: 600; }
.view-tools { display: flex; align-items: center; gap: 12px; }
.plot-hint, .section-note { margin: 0; font-size: 12px; color: #666; }
.chart-shell { position: relative; background: white; }
#fig { width: 100%; height: 760px; }
.chart-loading { position: absolute; z-index: 2; inset: 0; display: flex; align-items: center; justify-content: center; background: white; color: #666; }
.record-caption { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; padding: 0 0 8px; font-size: 12px; color: #555; }
.key.lo { margin-left: 14px; }
.hi { color: var(--hi); }
.lo { color: var(--lo); }
.phase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.phase-card { min-width: 0; padding: 12px 6px 0; }
.phase-head { display: flex; justify-content: space-between; flex-wrap: wrap; align-items: baseline; gap: 8px; }
.phase-head h3 { margin: 0; font-size: 13.5px; font-weight: 600; }
.phase-hi h3 span { color: var(--hi); }
.phase-lo h3 span { color: var(--lo); }
.phase-head p { margin: 0; color: #555; font-size: 12px; }
.phase-stats { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 5px 0 0; font-size: 12px; }
.phase-stats div { display: flex; gap: 5px; }
.phase-stats dt { color: #555; }
.phase-stats dd { margin: 0; font-variant-numeric: tabular-nums; }
.rose { width: 100%; height: 400px; }
.phase-caption { font-size: 12px; color: #555; margin: 4px 6px 16px; }
.method { border-top: 1px solid #ddd; scroll-margin-top: 12px; }
summary { cursor: pointer; padding: 10px 0; font-size: 13px; }
.summary-hint { margin-left: 12px; color: #666; font-size: 12px; }
.expand { display: none; }
.method-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; font-size: 12px; line-height: 1.5; color: #444; }
.method h3 { font-size: 13px; margin: 4px 0 8px; }
.method p { margin: 0 0 10px; }
.error { margin-top: 12px; padding: 10px; border: 1px solid #b00; color: #b00; overflow-wrap: anywhere; }
.error p { margin: 6px 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 900px) {
  fieldset { gap: 18px; }
  .header-meta { flex-direction: column; align-items: flex-end; gap: 4px; }
  .method-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .workspace { padding: 0 10px 12px; }
  .masthead { margin: 0 -10px; padding: 10px; align-items: flex-start; }
  .header-meta { font-size: 11px; }
  .controls { margin: 0 -10px; padding: 6px 10px 10px; }
  fieldset { grid-template-columns: 1fr; gap: 8px; }
  .range-labels { display: none; }
  .controls-foot { font-size: 11px; }
  .controls-foot button { font-size: 11px; }
  .plot-hint { display: none; }
  #fig { height: 620px; }
  .record-caption, .section-note { font-size: 11px; }
  .phase-grid { grid-template-columns: 1fr; gap: 8px; }
  .phase-card { padding: 10px 0 0; }
  .rose { height: 340px; }
  .phase-stats { gap: 6px 12px; font-size: 11px; }
  .phase-caption { margin-left: 0; font-size: 11px; }
  .method-grid { grid-template-columns: 1fr; gap: 10px; }
  .summary-hint { font-size: 11px; }
}