:root{color-scheme:light;--bg:#f3f6f6;--paper:#fff;--ink:#172b2a;--muted:#506664;--line:#c7d5d2;--green:#14594c;--soft:#e8f3ef;--blue:#1e527c;--blue-soft:#eaf2f9;--orange:#9b4b19;--danger:#a02828}
*{box-sizing:border-box}body{margin:0;font:16px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}.shell{max-width:1260px;width:calc(100% - 40px);margin:auto}header{padding:22px 0 14px}nav{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;font-size:.875rem;margin-bottom:16px}nav span{letter-spacing:.08em;color:var(--muted)}a{color:var(--green)}h1,h2,h3{line-height:1.18;letter-spacing:-.025em}h1{font-size:clamp(1.9rem,3.4vw,2.8rem);margin:0 0 10px}h2{font-size:1.35rem;margin:0 0 12px}h3{font-size:1.08rem;margin-top:24px}p{margin:0 0 14px}.lede{max-width:1050px;font-size:1.06rem}.boundary,.hint,small{color:var(--muted);font-size:.875rem}.boundary{margin-bottom:0}.card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:24px;margin-bottom:20px}.workbench{display:grid;grid-template-columns:305px minmax(0,1fr);gap:20px}.controls{align-self:start}.results{min-width:0}.cases{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 20px}button,input{font:inherit}button{background:white;color:var(--ink);border:1px solid var(--line);border-radius:8px;min-height:44px;padding:9px 13px;cursor:pointer}button:hover{border-color:var(--green);background:var(--soft)}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.cases button{font-size:.9rem}.cases button[aria-pressed=true],button.primary{background:var(--green);color:white;border-color:var(--green)}button.primary{width:100%;font-weight:700;margin-top:6px}.text-button{background:transparent;border:0;padding-left:0;text-decoration:underline;color:var(--green)}label{display:block;font-size:.9rem;font-weight:650;margin:0 0 14px}label .hint{display:block;font-weight:400}input{display:block;width:100%;min-width:0;margin-top:5px;padding:9px 10px;border:1px solid var(--line);border-radius:7px;background:var(--bg);color:var(--ink)}input[aria-invalid=true]{border:2px solid var(--danger)}.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.controls .hint{display:block;margin-bottom:14px}.status{font-size:.875rem;color:var(--green);margin-top:12px}.error{color:var(--danger);font-size:.9rem}.verdict{border-top:5px solid var(--green)}.verdict h2{font-size:1.8rem}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.875rem;color:var(--green);font-weight:750;margin-bottom:7px}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0}.metrics>div{padding:14px 15px;background:var(--soft);border-radius:9px}.metrics span{display:block;font-size:.875rem;color:var(--muted)}.metrics strong{display:block;font-size:1.85rem;line-height:1.3;margin-top:5px;font-variant-numeric:tabular-nums}.metrics small{display:block;margin-top:5px}.compact>div{background:var(--bg)}.compact strong{font-size:1.5rem}.timeline{display:flex;gap:0;margin-top:16px}.tick{position:relative;flex:1;border-top:3px solid var(--line);padding:10px 7px 0;font-size:.875rem}.tick:before{content:"";width:10px;height:10px;background:var(--line);border-radius:50%;position:absolute;left:6px;top:-7px}.tick.due{border-color:var(--green)}.tick.due:before{background:var(--green)}.tick.late{border-color:var(--danger)}.tick.late:before{background:var(--danger)}.tick b,.tick span{display:block}.tick span{font-size:.8rem;color:var(--muted)}.finding{padding:13px 16px;border-left:4px solid var(--blue);background:var(--blue-soft);border-radius:0 8px 8px 0}.branch-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.branch{border:1px solid var(--line);border-radius:9px;padding:14px;background:white}.branch strong,.branch span{display:block}.branch strong{color:var(--blue)}.branch span{font-size:.9rem;margin-top:5px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:15px}.section-heading button{flex-shrink:0}.breadcrumb{font-size:.9rem;color:var(--muted)}.node-summary{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;background:var(--green);color:white;padding:14px 18px;border-radius:9px;margin-bottom:16px}.node-summary span{font-size:.9rem}.explorer-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:24px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.9rem;text-align:left}caption{text-align:left;color:var(--muted);font-size:.875rem;padding-bottom:10px}th,td{padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}thead th{background:var(--bg);font-weight:650}td.num{font-variant-numeric:tabular-nums;white-space:nowrap}tr.best{background:var(--soft)}td button{padding:6px 10px;font-size:.875rem}.badge{display:block;font-size:.78rem;color:var(--green);font-weight:700}.inspector{padding:18px;background:var(--bg);border-radius:10px}.inspector .branch-pair{grid-template-columns:1fr}.inspector button{width:100%;text-align:left}.inspector h3{margin-top:0}.receipt{font-size:.875rem;margin:15px 0 0;color:var(--green)}details summary{cursor:pointer;font-size:1.1rem;font-weight:700;min-height:36px}details[open] summary{margin-bottom:20px}li{margin-bottom:9px}.definition{display:grid;grid-template-columns:130px 1fr;gap:10px}.definition dt{font-weight:700}.definition dd{margin:0}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg);padding:18px;border-radius:8px;font-size:.875rem}footer{color:var(--muted);font-size:.875rem;padding:15px 0 35px}.skip{position:absolute;left:-10000px}.skip:focus{left:15px;top:10px;padding:10px;background:white;z-index:10}button:disabled{cursor:not-allowed;color:var(--muted)}
@media(max-width:950px){.workbench{grid-template-columns:260px minmax(0,1fr)}.card{padding:18px}.metrics{grid-template-columns:1fr;gap:7px}.metrics>div{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 15px}.metrics strong{font-size:1.5rem;margin:0}.metrics small{flex-basis:100%;margin-top:0}.explorer-grid{grid-template-columns:1fr}}
@media(max-width:650px){.shell{width:calc(100% - 24px)}header{padding-top:16px}.workbench{display:flex;flex-direction:column}.controls{width:100%}.results{width:100%}.cases{gap:6px}.cases button{flex:1 1 145px}.branch-pair{grid-template-columns:1fr}.section-heading{align-items:start;flex-direction:column}.node-summary{flex-direction:column}.timeline{overflow-wrap:anywhere}.tick{padding-right:2px;padding-left:2px}.definition{grid-template-columns:1fr}.definition dd{margin-bottom:10px}}
@media print{body{background:white}.controls,.cases,.skip,button{display:none}.workbench{display:block}.card{break-inside:avoid}a{color:inherit}}

/* The visual essay: a choice tree, an expected-value bridge and one shared clock. */
.visual-essay{padding:28px;border-top:5px solid var(--blue)}
.visual-essay h2{font-size:clamp(1.5rem,2.5vw,2rem);max-width:760px}
.visual-lesson{font-size:1.12rem;max-width:940px;margin:16px 0 24px}
.visual-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:32px;align-items:start}
figure{margin:0}figcaption{font-weight:750;font-size:1rem;margin-bottom:8px}
.figure-note{font-size:.875rem;color:var(--muted);margin:16px 0 0}
.policy-node{max-width:430px;margin:18px auto 0;text-align:center;padding:18px 15px;background:var(--green);color:#fff;border-radius:12px}
.policy-node>span{display:block;font-size:.875rem}.policy-node>strong{display:block;font-size:1.35rem;line-height:1.25;margin:8px 0}
.policy-node.terminal{background:var(--blue)}
.policy-fork{height:34px;width:52%;margin:auto;position:relative;border-left:2px solid var(--line);border-right:2px solid var(--line);border-top:2px solid var(--line);top:17px;border-radius:9px 9px 0 0}
.policy-fork:before{content:"";position:absolute;width:2px;height:18px;background:var(--line);left:50%;top:-19px}
.policy-children{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:17px}
.policy-child{display:block;min-width:0;width:100%;padding:16px;text-align:left;background:var(--paper);border:2px solid var(--line);border-radius:12px}
.policy-child:hover{border-color:var(--blue);background:var(--blue-soft)}
.policy-child>span,.policy-child>strong{display:block}.signal-label{font-size:.875rem;color:var(--blue)}.signal-label b{display:block;font-size:1.3rem;font-variant-numeric:tabular-nums}
.posterior-label{font-size:.875rem;margin-top:12px}.posterior-label strong{white-space:nowrap}
.policy-child .next-choice{font-size:1.1rem;line-height:1.25;margin-top:15px}
.child-day{font-size:.875rem;color:var(--muted);margin-top:5px}.follow-label{font-size:.875rem;color:var(--blue);margin-top:15px;font-weight:650}
.closed-choice{padding:25px 15px;text-align:center;color:var(--blue);font-size:.95rem}.closed-choice span{display:block;font-size:1.6rem}
.belief-track{position:relative;display:block;height:14px;margin:15px 7px 8px;border-radius:3px;background:var(--soft)}
.belief-one,.belief-three{position:absolute;top:0;height:100%}.belief-one{left:0;width:56.25%;background:#c8ded5}.belief-three{left:56.25%;right:0;background:#c7dcef}
.belief-cut{position:absolute;left:56.25%;top:-5px;width:2px;height:24px;background:var(--muted)}
.belief-dot{position:absolute;top:50%;width:14px;height:14px;background:var(--ink);border:2px solid var(--paper);border-radius:50%;transform:translate(-50%,-50%)}
.value-figure{padding-left:28px;border-left:1px solid var(--line)}
#value-bridge{margin:30px 0 8px}.bridge-row{display:grid;grid-template-columns:minmax(104px,.95fr) minmax(0,1.3fr) 56px;gap:12px;align-items:center;min-height:51px}
.bridge-label{font-size:.875rem}.bridge-row>strong{text-align:right;font-size:1rem;font-variant-numeric:tabular-nums}
.bridge-track{height:24px;position:relative;background:var(--bg)}.bridge-bar{position:absolute;top:0;bottom:0;background:var(--blue);min-width:0;border-radius:2px}
.bridge-row.gain .bridge-bar{background:var(--green)}.bridge-row.cost .bridge-bar{background:var(--orange)}.bridge-row.total .bridge-bar{background:var(--green)}
.bridge-row.total{border-top:1px solid var(--line);margin-top:6px;padding-top:8px;font-weight:750}
.bridge-zero{position:absolute;width:2px;height:14px;top:5px;background:var(--muted);transform:translateX(-1px)}
.timing-figure{border-top:1px solid var(--line);margin-top:30px;padding-top:24px}
.timeline{display:block;margin:22px 10px 0 0}
.time-axis,.time-row{display:grid;grid-template-columns:165px minmax(0,1fr) 205px;column-gap:20px;align-items:center}
.time-axis{margin-bottom:14px;font-size:.875rem;color:var(--muted)}.time-axis>div{position:relative;height:24px}
.time-axis b{position:absolute;transform:translateX(-50%);font-weight:500}.time-axis b:first-child{transform:none}.time-axis b:last-child{transform:translateX(-100%)}
.time-row{min-height:47px;font-size:.9rem}.time-lane{height:17px;position:relative;background:var(--bg)}
.time-bar{position:absolute;left:0;top:0;bottom:0;border-radius:3px;background:var(--blue)}.time-bar.open{background:var(--green)}.time-bar.routine{background:#698db0}.time-bar.late{background:var(--danger)}
.deadline-line{position:absolute;top:-8px;bottom:-8px;border-left:2px dashed var(--green);transform:translateX(-1px)}.time-row small{font-size:.875rem}.time-row .late-copy{color:var(--danger);font-weight:700}
.belief-figure{margin:24px 0;border-top:1px solid var(--line);padding-top:20px}.belief-key{display:flex;justify-content:space-between;color:var(--muted);font-size:.875rem;margin:16px 7px 7px}
.belief-row{margin:18px 0}.belief-row>div{display:flex;justify-content:space-between;gap:12px;font-size:.9rem}.belief-row .belief-track{margin-top:12px}.belief-row>small{display:block;font-size:.875rem;margin:8px 7px 0}
@media(max-width:1000px){.visual-layout{gap:22px}.value-figure{padding-left:20px}.bridge-row{grid-template-columns:110px minmax(0,1fr) 48px;gap:8px}.time-axis,.time-row{grid-template-columns:155px minmax(0,1fr) 175px;gap:15px}}
@media(max-width:800px){.visual-layout{grid-template-columns:1fr}.value-figure{padding:24px 0 0;border-left:0;border-top:1px solid var(--line)}.bridge-row{grid-template-columns:155px minmax(0,1fr) 65px}.time-axis,.time-row{grid-template-columns:145px minmax(0,1fr);gap:12px}.time-row{margin-bottom:15px}.time-row small{grid-column:2}.time-axis>span{align-self:start}.visual-essay{padding:20px}}
@media(max-width:500px){.visual-essay{padding:17px}.visual-lesson{font-size:1rem}.policy-children{gap:10px}.policy-child{padding:11px}.policy-child .next-choice{font-size:1rem}.policy-child .belief-track{margin-left:5px;margin-right:5px}.posterior-label strong{white-space:normal}.bridge-row{grid-template-columns:105px minmax(0,1fr) 49px;gap:8px}.time-axis,.time-row{grid-template-columns:105px minmax(0,1fr);gap:10px}.time-row>span{font-size:.875rem}.visual-essay .section-heading button{font-size:.9rem}.policy-node>strong{font-size:1.2rem}}
@media(prefers-reduced-motion:no-preference){.bridge-bar{transition:width .25s ease,left .25s ease}.belief-dot{transition:left .25s ease}}