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.footer{align-items:flex-start}.source-citation{max-width:74ch}.source-citation p{margin:8px 0 0;font-size:14px;line-height:1.65;color:var(--ink)}.footer>a{white-space:nowrap;min-height:44px;display:inline-flex;align-items:center}
@media(max-width:760px){.footer{flex-direction:column;gap:12px}.source-citation p{font-size:13px}.source-citation .eyebrow{font-size:11px}}
.math-inline{font-family:var(--math);font-size:1em;white-space:nowrap}.value-definition{margin:22px 0;padding:18px 12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.value-definition math{font-size:25px}.step .value-definition p{font-size:13px;line-height:1.55;color:var(--muted);margin:13px 0 0}.formula-step{min-height:100svh}.stage-shell.is-formula-scene .voters,.stage-shell.is-formula-scene .outcome{position:absolute;opacity:0;visibility:hidden;transition:none;pointer-events:none;transform:translateY(-30px) scale(.85)}.is-formula-scene .graph-container{flex:1;min-height:110px;max-height:230px;max-width:none;width:100%;display:flex;justify-content:center;align-items:center}.is-formula-scene .graph-canvas{height:100%;width:auto;max-height:230px;max-width:100%;aspect-ratio:680/510}.is-formula-scene .formula-view{flex-shrink:0}.is-formula-scene .coalition-node{width:25%;max-width:95px;min-height:36px;padding:4px 2px;gap:3px}.is-formula-scene .coalition-set{font-size:13px}.is-formula-scene .coalition-value{font-size:0;letter-spacing:0}.is-formula-scene .coalition-value b{font-size:10px}.coalition-node.is-formula-source{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue)}.coalition-node.is-formula-target{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue);background:var(--blue-soft)}.is-formula-scene .edge-label{display:none}.is-formula-scene .stage-bottom{font-size:12px;text-align:center}
@media(max-width:760px){.value-definition math{font-size:23px}.formula-step{min-height:90svh}.stage-shell.is-formula-scene{height:70svh;min-height:480px;padding-top:12px;padding-bottom:10px}.is-formula-scene .graph-container{min-height:90px;max-height:190px;width:100%}.is-formula-scene .graph-canvas{max-height:190px}.is-formula-scene .stage-bottom{font-size:10px;min-height:27px}.is-formula-scene .coalition-set{font-size:12px}.is-formula-scene .coalition-node{min-height:33px}}

.stage-shell.is-value-function-scene .voters,.stage-shell.is-value-function-scene .outcome{position:absolute;opacity:0;visibility:hidden;transition:none;pointer-events:none}.stage-shell.is-value-function-scene .stage-bottom{text-align:center}
@media(max-width:760px){.stage-shell.is-value-function-scene{height:64svh;min-height:420px}.is-value-function-scene .graph-container{width:min(100%,calc((64svh - 85px)*1.333));max-width:440px}}
.coalition-payoff{display:grid;place-items:center;width:100%}.coalition-payoff>span,.coalition-payoff>math{grid-area:1/1}.coalition-value-formula{display:none;letter-spacing:normal}.is-value-function-scene .coalition-node{width:29%;max-width:155px}.is-value-function-scene .coalition-value{opacity:1;transform:translateY(0);transition:opacity .22s,transform .22s}.is-value-function-scene .coalition-value-formula{display:block;font-size:14px;opacity:0;transform:translateY(4px);transition:opacity .22s,transform .22s}.is-value-function-scene.has-payoff-notation .coalition-value{opacity:0;transform:translateY(-4px)}.is-value-function-scene.has-payoff-notation .coalition-value-formula{opacity:1;transform:translateY(0)}
@media(max-width:760px){.is-value-function-scene .coalition-value-formula{font-size:11px}}
@media(prefers-reduced-motion:reduce){.is-value-function-scene .coalition-value,.is-value-function-scene .coalition-value-formula{transition:none;transform:none}}

/* Cover, story, diagram, and controls share the course palette. */
.title-page{
  --cover-ink:var(--ink);
  --cover-muted:var(--muted);
  --cover-blue:var(--blue);
  min-height:calc(100svh - 68px);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:clamp(32px,5svh,64px) 24px clamp(32px,6svh,72px);
  background:#fff;
  color:var(--cover-ink);
  text-align:center;
}
.title-page-content{width:100%;max-width:1100px}
.title-page:focus,.step[tabindex="-1"]:focus{outline:none}
.title-page-kicker{margin:0 0 13px;font-size:12px;letter-spacing:.14em;line-height:1.5;color:var(--cover-muted)}
.title-page h1{margin:0 auto;max-width:19ch;font-family:var(--serif);font-size:clamp(46px,5vw,72px);font-weight:400;line-height:1.08;letter-spacing:-.035em;text-wrap:balance}
.title-page-art{margin:24px 0 0;display:flex;flex-direction:column;align-items:center}
.title-page-art img{display:block;width:auto;height:auto;max-width:min(660px,100%);max-height:40svh;object-fit:contain}
.title-page-start{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:44px;margin-top:20px;padding:6px 10px;font-size:15px;line-height:1.5;color:var(--cover-blue);text-decoration-thickness:1px}
.title-page-start:focus-visible{outline-color:var(--cover-blue)}
.title-page-start span{font-size:20px;line-height:1}
.title-page-application{margin:18px 0 0;font-size:16px;line-height:1.5;color:var(--cover-muted)}
@media(max-width:760px){
  .title-page{min-height:calc(100svh - 54px);padding:28px 24px 32px}
  .title-page h1{font-size:clamp(32px,9vw,46px);max-width:13ch}
  .title-page-art{margin-top:18px}
  .title-page-art img{max-height:32svh}
  .title-page-start{margin-top:18px;font-size:14px}
  .title-page-application{margin-top:16px;font-size:14px}
}
@media(min-width:761px) and (max-height:700px){
  .title-page{padding-top:28px;padding-bottom:32px}
  .title-page h1{font-size:52px}
  .title-page-art{margin-top:12px}
  .title-page-art img{max-height:31svh}
  .title-page-start{margin-top:10px}
  .title-page-application{margin-top:10px;font-size:14px}
}
@media(max-width:760px) and (max-height:650px){
  .title-page{padding:14px 20px 22px}
  .title-page-kicker{font-size:11px;margin-bottom:8px}
  .title-page h1{font-size:32px}
  .title-page-art{margin-top:12px}
  .title-page-art img{max-height:25svh}
  .title-page-start{margin-top:10px}
  .title-page-application{margin-top:10px}
}