:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #263447;
  background: #f8f9fb;
  font-synthesis: none;
  --orange: #d95e2c;
  --muted: #596779;
  --border: #dfe4eb;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { opacity: .55; cursor: default; }
button:focus-visible, a:focus-visible, summary:focus-visible, input:focus-visible, canvas:focus-visible {
  outline: 3px solid #d95e2c80; outline-offset: 4px;
}
[hidden] { display: none !important; }
.skip { position: absolute; left: 20px; top: -60px; background: white; padding: 12px; z-index: 20; }
.skip:focus { top: 10px; }
header, main, footer { max-width: 1280px; margin: auto; padding-left: 32px; padding-right: 32px; }
.site-header { min-height: 86px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--border); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 650; letter-spacing: -.4px; white-space: nowrap; }
.site-nav { display: flex; gap: 26px; align-self: stretch; align-items: stretch; }
.site-nav a { display: flex; align-items: center; font-size: 17px; border-bottom: 3px solid transparent; padding-top: 3px; }
.site-nav a[aria-current="page"] { border-bottom-color: var(--orange); font-weight: 600; }
.site-nav a:hover, footer a:hover { color: #b64921; }
.intro { padding: 32px 0 20px; }
h1 { font-size: clamp(32px, 3.2vw, 42px); line-height: 1.18; letter-spacing: -1.25px; font-weight: 650; margin: 0 0 16px; }
.intro p { max-width: 980px; font-size: 18px; line-height: 1.65; margin: 0; color: #465568; }
.intro .demo-question { margin-top: 13px; color: #263447; }
strong { font-weight: 650; }
.start-guide { font-size: 17px; line-height: 1.6; margin: 0 0 15px; }
.experiment { background: white; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; scroll-margin-top: 16px; }
.toolbar { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 324px; gap: 28px; align-items: center; padding: 22px 26px; border-bottom: 1px solid var(--border); }
.setting-control { min-width: 0; }
.setting-label { display: flex; align-items: center; gap: 8px; min-height: 28px; }
.setting-label label { font-size: 17px; font-weight: 600; }
.setting-label output { margin-left: auto; font-size: 18px; color: #ae461e; font-weight: 600; font-variant-numeric: tabular-nums; }
.setting-control input { width: 100%; display: block; accent-color: var(--orange); height: 24px; margin: 7px 0 0; cursor: pointer; }
.range-limits { display: flex; justify-content: space-between; font-size: 15px; color: var(--muted); line-height: 1.5; font-variant-numeric: tabular-nums; }
.actions { display: grid; grid-template-columns: 104px 54px 146px; gap: 10px; align-items: center; }
.run-status { font-size: 15px; color: var(--muted); white-space: nowrap; }
.train-button { width: 146px; min-height: 46px; padding: 10px 8px; border: 1px solid #c85527; border-radius: 7px; background: var(--orange); color: white; font-size: 16px; font-weight: 600; white-space: nowrap; }
.train-button:hover:enabled { background: #c45125; }
.train-button[data-running="true"] { background: #2f4057; border-color: #2f4057; }
.reset-button { width: 54px; min-height: 46px; padding: 8px 0; background: none; border: 0; color: #43546b; font-size: 16px; }
.reset-button:hover:enabled { color: #ae461e; }
.info-button { flex: 0 0 26px; width: 26px; height: 26px; padding: 0; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #b6c0cc; border-radius: 50%; color: #596779; background: transparent; font: 600 15px/1 Georgia, serif; }
.info-button:hover, .info-button[aria-expanded="true"] { background: #edf1f6; border-color: #596779; color: #263447; }
.info-popover { position: fixed; overflow: auto; z-index: 100; width: 340px; max-width: calc(100vw - 32px); padding: 16px 18px; border: 1px solid #cbd3dd; border-radius: 9px; background: #fff; box-shadow: 0 6px 26px #23344b26; font-size: 16px; line-height: 1.6; color: #263447; }
.info-popover p { margin: 0; }
.plots { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.plot-panel { min-width: 0; padding: 22px 22px 16px; }
.plot-panel + .plot-panel { border-left: 1px solid var(--border); }
.plot-heading { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.plot-heading h2 { font-size: 22px; line-height: 1.4; font-weight: 600; margin: 0; letter-spacing: -.25px; }
.map-wrap { position: relative; }
canvas, .policy-visual { display: block; width: 100%; height: 400px; }
#landscape-chart { cursor: crosshair; }
.map-loading { position: absolute; inset: 0; background: #fffffff0; display: flex; align-items: center; justify-content: center; font-size: 16px; color: #596779; pointer-events: none; }
.plot-footer { display: flex; justify-content: flex-end; gap: 12px; padding: 7px 24px 0; font-size: 16px; line-height: 1.5; }
.plot-footer strong { font-variant-numeric: tabular-nums; margin-left: 7px; }
.policy-visual { display: flex; flex-direction: column; }
.policy-visual canvas { height: 0; min-height: 0; flex: 1; }
.legend { display: flex; flex: 0 0 auto; align-items: center; align-content: center; flex-wrap: wrap; gap: 8px 20px; min-height: 63px; padding: 0 24px 0 74px; font-size: 16px; line-height: 1.5; color: #465568; }
.legend > span { display: flex; align-items: center; gap: 7px; }
.legend i { width: 17px; height: 2px; display: inline-block; flex-shrink: 0; }
.high-line { background: #4f79b7; }
.low-line { background: repeating-linear-gradient(90deg, #e58a54 0 5px, transparent 5px 8px); }
.playback { padding: 17px 26px 15px; border-top: 1px solid var(--border); }
.playback-labels { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 17px; }
.label-with-info { display: flex; align-items: center; gap: 8px; }
.playback-labels label { font-weight: 600; }
.playback-labels output { font-size: 16px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.playback input { display: block; width: 100%; height: 20px; margin: 10px 0 3px; accent-color: var(--orange); cursor: pointer; }
.playback input:disabled { cursor: default; opacity: .5; }
.playback-notes { display: flex; justify-content: flex-end; font-size: 15px; color: var(--muted); font-variant-numeric: tabular-nums; line-height: 1.5; }
.policy-note { padding: 16px 26px; border-top: 1px solid var(--border); background: #f4f6f9; min-height: 64px; }
.policy-note p { font-size: 17px; line-height: 1.7; margin: 0; }
.policy-note[data-kind="learned"] { background: #f0f7f4; }
.policy-note[data-kind="learned"] strong { color: #27634d; }
.policy-note[data-kind="reversed"] { background: #fff4ed; }
.policy-note[data-kind="reversed"] strong { color: #954421; }
.explanation { padding: 38px 0 0; }
.explanation-intro { max-width: 940px; }
.explanation h2 { font-size: 28px; line-height: 1.3; letter-spacing: -.5px; font-weight: 600; margin: 0 0 12px; }
.explanation p { font-size: 18px; line-height: 1.7; margin: 0; }
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin: 24px 0 28px; }
.comparison > div { border-left: 3px solid #c6ceda; padding-left: 18px; }
.comparison h3 { font-size: 18px; line-height: 1.5; margin: 0 0 7px; }
.comparison p { font-size: 17px; color: #465568; }
.about { border-top: 1px solid var(--border); }
.about:last-child { border-bottom: 1px solid var(--border); }
.about summary { font-size: 18px; line-height: 1.5; font-weight: 550; cursor: pointer; padding: 20px 0; }
.details-body { max-width: 1000px; padding: 0 0 22px; }
.details-body p { margin: 0 0 16px; font-size: 17px; line-height: 1.8; }
.details-body p:last-child { margin-bottom: 0; }
.details-body a, .paper-article p a { text-decoration: underline; text-underline-offset: 4px; }
.reward-formula { background: #edf1f6; padding: 16px 18px; border-radius: 6px; color: #263447; overflow-wrap: anywhere; }
math { font-family: "STIX Two Math", "STIX Math", "Cambria Math", math; }
.math-equation { margin: 18px 0; padding: 12px 0; overflow-x: auto; }
.math-equation math { width: max-content; min-width: 100%; margin: 0; font-size: 24px; }
.math-equation .math-narrow { display: none; }
.reward-formula { display: flex; flex-wrap: wrap; gap: 0 .35em; font-weight: 550; }
footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 16px; color: var(--muted); padding-top: 28px; padding-bottom: 32px; }
.error { font-size: 16px; color: #954421; background: #fff0e9; border: 1px solid #f1cdbd; padding: 13px; margin: 16px 24px; border-radius: 6px; line-height: 1.6; }
.paper-main { padding-top: 46px; padding-bottom: 48px; }
.paper-article { max-width: 890px; margin: 0 auto; }
.paper-kicker { margin: 0 0 13px; font-size: 17px; color: #ae461e; font-weight: 600; }
.paper-article h1 { max-width: 850px; font-size: clamp(32px, 3.6vw, 46px); line-height: 1.2; }
.paper-authors { font-size: 20px; line-height: 1.7; margin: 21px 0 7px; }
.paper-affiliations { font-size: 17px; line-height: 1.6; margin: 0; color: #465568; }
.paper-links { display: flex; align-items: center; flex-wrap: wrap; gap: 17px 26px; margin: 25px 0 38px; font-size: 17px; }
.paper-links > a:not(.primary-link) { text-decoration: underline; text-underline-offset: 4px; }
.primary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; background: #263e5b; padding: 11px 18px; border-radius: 6px; color: white; font-size: 17px; text-decoration: none !important; }
.primary-link:hover { background: #344f70; }
.paper-abstract { border-top: 1px solid var(--border); padding-top: 28px; }
.paper-article section { margin-bottom: 30px; }
.paper-article h2 { font-size: 25px; line-height: 1.4; letter-spacing: -.35px; margin: 0 0 13px; }
.paper-article section p, .paper-article li { font-size: 18px; line-height: 1.8; margin: 0 0 14px; }
.paper-article ol { padding-left: 25px; }
.paper-article li { padding-left: 5px; margin-bottom: 9px; }
.paper-callout { border-left: 3px solid #d95e2c; padding-left: 20px; }
@media (max-width: 1100px) {
  .toolbar { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px 28px; }
  .actions { grid-column: 1 / -1; grid-template-columns: minmax(104px, 1fr) 54px 146px; border-top: 1px solid var(--border); padding-top: 15px; }
}
@media (max-width: 950px) {
  header, main, footer { padding-left: 24px; padding-right: 24px; }
  .plot-panel { padding: 20px 14px 16px; }
  canvas, .policy-visual { height: 375px; }
  .legend { padding-left: 60px; padding-right: 12px; }
}
@media (max-width: 700px) {
  .site-header { flex-wrap: wrap; gap: 12px; padding-top: 17px; }
  .site-nav { gap: 23px; }
  .site-nav a { min-height: 48px; font-size: 16px; }
  .intro { padding-top: 26px; }
  .plots { grid-template-columns: 1fr; }
  .plot-panel { padding: 22px 20px 16px; }
  .plot-panel + .plot-panel { border-left: 0; border-top: 1px solid var(--border); }
  canvas, .policy-visual { height: 365px; }
  .comparison { grid-template-columns: 1fr; gap: 23px; }
  .legend { padding-left: 74px; }
}
@media (max-width: 540px) {
  .math-equation .math-wide { display: none; }
  .math-equation .math-narrow { display: block; }
  header, main, footer { padding-left: 18px; padding-right: 18px; }
  .site-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .brand { font-size: 21px; }
  .intro p { font-size: 18px; }
  h1 { letter-spacing: -.9px; }
  .start-guide { font-size: 17px; }
  .toolbar { grid-template-columns: minmax(0, 1fr); padding: 20px; gap: 20px; }
  .actions { grid-template-columns: minmax(0, 1fr) 48px 140px; gap: 8px; }
  .reset-button { width: 48px; }
  .train-button { width: 140px; }
  .run-status { font-size: 14px; }
  .plot-panel { padding: 22px 12px 16px; }
  .plot-heading { padding: 0 6px; }
  .plot-heading h2 { font-size: 21px; }
  .playback { padding: 17px 18px 14px; }
  .playback-labels { flex-wrap: wrap; row-gap: 7px; }
  .policy-note { padding: 15px 18px; }
  .explanation { padding-top: 30px; }
  .explanation h2 { font-size: 26px; }
  .paper-main { padding-top: 32px; }
  .paper-authors { font-size: 19px; }
  .paper-article h2 { font-size: 23px; }
}
@media (max-width: 440px) {
  canvas, .policy-visual { height: 340px; }
  .legend { padding-left: 16px; padding-right: 8px; }
  .actions { grid-template-columns: minmax(0, 1fr) 48px 132px; gap: 6px; }
  .train-button { width: 132px; font-size: 15px; }
  .run-status { white-space: normal; min-height: 40px; display: flex; align-items: center; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }