*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}a{color:var(--ink);text-decoration:underline;text-underline-offset:3px}button,input,select{font:inherit}button{touch-action:manipulation}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}[hidden]{display:none!important}.shell{max-width:1440px;margin:auto;padding:0 var(--space-8)}header{display:flex;gap:var(--space-4);align-items:center;flex-wrap:wrap;padding:var(--space-6) 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:var(--space-3);text-decoration:none;margin-right:auto;font-weight:500}.kitty{object-fit:contain;background:var(--kitty-paper);border-radius:var(--radius-md);padding:4px;box-sizing:content-box}nav{width:100%;display:flex;gap:var(--space-6);flex-wrap:wrap}nav a{font-size:14px;color:var(--ink-muted)}nav a[aria-current]{color:var(--ink);font-weight:600;text-decoration-thickness:2px}main{padding:var(--space-12) 0;min-width:0}h1{font-family:var(--font-serif);font-size:clamp(34px,4vw,56px);line-height:1.1;font-weight:500;letter-spacing:-.015em;margin:var(--space-3) 0 var(--space-6);overflow-wrap:anywhere}h2{font-size:24px;line-height:1.3;margin:var(--space-12) 0 var(--space-4)}h3{font-size:20px}p{max-width:90ch;margin:0 0 var(--space-4)}.lede{font-size:20px;line-height:1.5;max-width:74ch}.eyebrow{font:13px var(--font-mono);color:var(--ink-muted)}.muted,small{color:var(--ink-muted)}small{display:block;font-size:13px;line-height:1.4}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-4);margin:var(--space-8) 0}.sk-card{max-width:none;min-width:0}.sk-card p{margin:0}.stat{font:500 clamp(20px,2.5vw,32px) var(--font-sans);font-variant-numeric:tabular-nums}.sk-callout{max-width:none;margin:var(--space-6) 0}.sk-callout-title{margin:0 0 var(--space-2)}.sk-callout p{margin:0}.notice{padding:var(--space-4);background:var(--surface-sunk)}.tabs{display:flex;gap:var(--space-2);flex-wrap:wrap;margin:var(--space-8) 0 var(--space-4)}.tabs [aria-selected=true]{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.table-scroll{max-width:100%;overflow:auto;border:1px solid var(--line);border-radius:var(--radius-md);margin-bottom:var(--space-6);background:var(--surface-raised)}table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.5;font-variant-numeric:tabular-nums;text-align:left}caption{text-align:left;padding:var(--space-4);font-size:13px;color:var(--ink-muted);background:var(--surface-sunk)}th,td{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--line);vertical-align:top}thead th{font-size:13px;font-weight:600;background:var(--surface-sunk);white-space:normal;min-width:90px}tbody th{font-weight:500;overflow-wrap:anywhere;min-width:170px;max-width:370px}tbody tr:last-child>*{border-bottom:0}tbody tr:hover{background:var(--surface-sunk)}.sort{border:0;background:none;color:var(--ink);padding:0;text-align:left;cursor:pointer;font-weight:600}.sort:after{content:' ↕';font-size:13px}[aria-sort=ascending] .sort:after{content:' ↑'}[aria-sort=descending] .sort:after{content:' ↓'}.score-bar{display:block;width:150px;height:22px;max-width:100%}.score-value{font-weight:600}.headline-score{font:500 48px var(--font-serif);display:flex;align-items:center;gap:var(--space-4);flex-wrap:wrap}.charts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-4);margin:var(--space-6) 0}.charts svg{width:100%;height:auto}.charts svg text,svg.heatmap text{font:13px var(--font-sans);fill:var(--ink)}.heatmap{display:block;max-width:none}details{border-bottom:1px solid var(--line);padding:var(--space-4) 0}summary{cursor:pointer;font-weight:500}.evidence-list{list-style:none;padding:0;font-size:14px}.evidence-list li{padding:var(--space-2) 0;overflow-wrap:anywhere}.filters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-4);margin:var(--space-6) 0}.sk-field{max-width:none}.pager{display:flex;gap:var(--space-4)}code,pre{font:14px/1.6 var(--font-mono);overflow-wrap:anywhere}pre{white-space:pre-wrap;background:var(--surface-sunk);padding:var(--space-4);border-radius:var(--radius-sm)}dt{font-weight:600;margin-top:var(--space-4)}dd{margin:var(--space-2) 0}li{margin-bottom:var(--space-2)}footer{font-size:13px;color:var(--ink-muted);border-top:1px solid var(--line);padding:var(--space-6) 0 var(--space-12);overflow-wrap:anywhere}.skip{position:absolute;top:-100px;left:16px;padding:12px;background:var(--surface-raised);z-index:10}.skip:focus{top:8px}.task-card{padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);margin-bottom:var(--space-4);background:var(--surface-raised);overflow-wrap:anywhere}.task-card h2{font:500 16px var(--font-mono);margin:0 0 var(--space-2)}.task-models{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3);list-style:none;padding:0;font-size:14px}.task-models li{margin:0}.task-models .sk-badge{margin:var(--space-1) 0}.task-models a{display:block}
@media(max-width:900px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.filters,.task-models{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.shell{padding:0 16px}header{gap:var(--space-3);padding:var(--space-4) 0}.brand{gap:var(--space-2);font-size:13px}.kitty{width:32px;height:32px}nav{gap:var(--space-3)}main{padding:var(--space-8) 0}.cards{gap:var(--space-2)}.sk-card{padding:var(--space-4)}.stat{font-size:22px}.charts,.filters,.task-models{grid-template-columns:1fr}.lede{font-size:18px}.tabs .sk-btn{padding:0 var(--space-3);font-size:13px}th,td{padding:var(--space-3)}.headline-score{font-size:40px}h2{margin-top:var(--space-8)}.sk-callout{padding:var(--space-4)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.partner-strip{width:100%;display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2);font:500 14px/20px var(--font-sans);border-bottom:1px solid var(--line);padding-bottom:var(--space-3)}.partner-strip a{display:inline-flex;align-items:center;gap:var(--space-2);max-width:100%;color:var(--ink)}.partner-mark{display:inline-flex;padding:var(--space-4);flex:none}.partner-mark img{display:block;object-fit:contain}.partner-mark .mark-night{display:none}.product-dot{width:8px;height:8px;border-radius:var(--radius-pill);background:var(--spec);flex:none}.partner-footer{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-8);margin-bottom:var(--space-8)}.partner-footer section{min-width:0}.partner-footer h2{margin:0 0 var(--space-3);font:600 20px/28px var(--font-sans)}.partner-footer p{font-size:14px;line-height:20px}.thanks{margin:var(--space-6) 0}.infrastructure{margin-top:var(--space-8);padding-top:var(--space-4);border-top:1px solid var(--line)}
:root[data-theme=dark] .partner-mark .mark-day{display:none}:root[data-theme=dark] .partner-mark .mark-night{display:block}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .partner-mark .mark-day{display:none}:root:not([data-theme=light]) .partner-mark .mark-night{display:block}}
@media(max-width:600px){.partner-footer{grid-template-columns:1fr;gap:var(--space-6)}.partner-strip{column-gap:var(--space-2);row-gap:var(--space-3)}.partner-strip>a:first-child{flex-basis:100%}}
figure.shot{margin:var(--space-6) 0;max-width:1100px}figure.shot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);background:var(--surface-raised)}figure.shot figcaption{font-size:13px;line-height:1.5;color:var(--ink-muted);margin-top:var(--space-2);max-width:90ch}
/* The front-page chart cards share the same paper, ink and spacing as the tables. */
.chart-dashboard{display:grid;gap:var(--space-6);margin:var(--space-8) 0 var(--space-12);min-width:0}.chart-card{padding:var(--space-6);overflow:hidden}.chart-card .sk-card-title{font:500 clamp(23px,2.4vw,32px)/1.22 var(--font-serif);margin:var(--space-2) 0 var(--space-3);overflow-wrap:anywhere;max-width:52ch}.chart-card .sk-card-eyebrow{font:13px/20px var(--font-sans);color:var(--ink-muted)}.chart-card .chart-caption{font:14px/21px var(--font-sans);color:var(--ink-muted);max-width:90ch}.chart-canvas{height:640px;width:100%;min-width:0;margin:var(--space-4) 0;font-variant-numeric:tabular-nums}.chart-canvas svg{font-variant-numeric:tabular-nums}.chart-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-6);min-width:0}.chart-card .chart-source{border-top:1px solid var(--line);padding-top:var(--space-4);font:13px/20px var(--font-sans);color:var(--ink-muted);margin-top:auto}.chart-card .chart-data{border:0;padding:var(--space-4) 0;font-size:13px}.chart-data .table-scroll{margin-top:var(--space-4)}.chart-tabs{margin:var(--space-6) 0 0}.chart-pair .chart-card{display:flex;flex-direction:column}.chart-pair .chart-caption{min-height:105px}#chart-unique{height:480px}#chart-heatmap{height:680px}#chart-scatter{height:520px}.chart-fallback{font-size:14px;color:var(--ink-muted)}
@media(max-width:1050px){.chart-pair{grid-template-columns:1fr}.chart-pair .chart-caption{min-height:0}}
@media(max-width:600px){.chart-dashboard{gap:var(--space-4)}.chart-card{padding:var(--space-4)}.chart-canvas{height:760px}.chart-card .sk-card-title{font-size:25px}#chart-outcomes{height:820px}#chart-unique{height:620px}#chart-heatmap{height:800px}#chart-scatter{height:680px}.chart-pair{gap:var(--space-4)}}
.research-invite{margin:var(--space-8) 0}.research-invite a{width:fit-content}.research-content{max-width:1100px}.research-content li{max-width:90ch;margin-bottom:var(--space-4)}.research-content .paired-facts{font-variant-numeric:tabular-nums}.research-content pre{overflow-x:auto;white-space:pre;max-width:100%}.research-content pre code{overflow-wrap:normal}.research-content td:nth-child(2){min-width:280px}.research-content caption{caption-side:bottom}
.nowrap{white-space:nowrap;overflow-wrap:normal}
.family-legend{display:flex;flex-wrap:wrap;gap:var(--space-2);margin:var(--space-3) 0;align-items:center}
.family-toggle{display:inline-flex;align-items:center;gap:var(--space-2);min-height:32px;padding:4px 8px;font-size:13px;color:var(--ink);background:var(--surface-raised);border:1px solid var(--line-strong);border-radius:var(--radius-sm);cursor:pointer}
.family-toggle:hover{background:var(--surface-sunk)}.family-toggle[aria-pressed=true]{background:var(--accent-soft);text-decoration:none}.family-toggle[aria-pressed=true] .family-chip{opacity:.25}
.family-chip{display:inline-block;width:10px;height:10px;border-radius:2px;flex:none}
/* Official context uses neutral controls and two shared-axis dot strips. */
#card-official{margin-top:var(--space-8)}.official-filters,.official-legend{display:flex;gap:var(--space-3);flex-wrap:wrap;margin:var(--space-4) 0}.official-filters [aria-pressed=true]{background:var(--accent);color:var(--on-accent)}.official-legend{font-size:13px;color:var(--ink-muted)}.official-legend span{display:inline-flex;align-items:center;gap:var(--space-2);min-width:0}.official-dot{flex:none}.official-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--ink-muted);opacity:.55}.official-dot.mini{background:var(--ink);opacity:1}.official-dot.diamond{border-radius:0;transform:rotate(45deg)}.official-plot{position:relative;margin:var(--space-4) 0}#chart-official{height:380px;margin:0}.official-point{position:absolute;width:10px;height:10px;transform:translate(-50%,-50%);border:0;border-radius:50%;padding:0;background:transparent;cursor:pointer}.official-point:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.official-card{padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface-sunk);font-size:14px;overflow-wrap:anywhere;margin-bottom:var(--space-4)}#card-official>.chart-caption{margin-bottom:var(--space-3)}#card-official tfoot{color:var(--ink-muted);font-size:13px}#official-focus{position:absolute;inset:0;pointer-events:none}#official-focus button{pointer-events:auto}
@media(max-width:600px){#chart-official{height:380px}.official-filters{gap:var(--space-2)}.official-filters button{max-width:100%;white-space:normal;min-height:40px}}
/* The complete key keeps every model available independently of plot labels. */
.scatter-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,330px);gap:var(--space-6);align-items:start}.scatter-layout>div{min-width:0}.scatter-key{margin:var(--space-4) 0;padding-left:24px;font-size:13px;font-variant-numeric:tabular-nums}.scatter-key li{padding-left:2px}.scatter-model{display:flex;align-items:flex-start;gap:8px;border:0;background:none;color:var(--ink);padding:6px 0;text-align:left;cursor:pointer;width:100%;font-size:13px;overflow-wrap:anywhere}.scatter-model>span:last-child{min-width:0}.scatter-model small{margin-top:3px}.scatter-marker{width:12px;height:12px;border-radius:50%;flex:none;margin-top:4px}#chart-scatter{height:760px}
@media(max-width:1050px){.scatter-layout{grid-template-columns:minmax(0,1fr)}.scatter-key{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 var(--space-6)}}
@media(max-width:600px){.scatter-key{grid-template-columns:minmax(0,1fr)}#chart-scatter{height:900px}}
/* The numbered key stays below the score strips; long route names can wrap. */
.official-key{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 var(--space-6);padding:0;margin:var(--space-3) 0;font-variant-numeric:tabular-nums}
.official-key li{min-width:0;border-bottom:1px solid var(--line)}
.official-model{display:grid;grid-template-columns:22px 10px minmax(0,1fr) auto;gap:8px;align-items:center;width:100%;min-height:44px;padding:8px 0;border:0;text-align:left;font-size:13px;line-height:19px;background:transparent;color:var(--ink);cursor:pointer}
.official-model:hover{background:var(--surface-sunk)}
.official-model-name{overflow-wrap:anywhere}
.official-number{font-family:var(--font-mono);text-align:center;color:var(--ink-muted)}
.official-score{white-space:nowrap;font-variant-numeric:tabular-nums}
.official-point[data-official-point^="1:"]{width:24px;height:24px}
@media(max-width:800px){.official-key{grid-template-columns:minmax(0,1fr)}}
/* Cumulative solves retain readable labels inside a keyboard-scrollable region. */
.glossary{padding:var(--space-4);margin:var(--space-6) 0;background:var(--surface-sunk);border:1px solid var(--line);border-radius:var(--radius-md)}
.glossary h2{font:600 16px/24px var(--font-sans);margin:0 0 var(--space-3)}
.glossary dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-6);margin:0;font:14px/21px var(--font-sans)}
.glossary dt{margin:0}.glossary dd{margin:var(--space-1) 0 0}
.accumulation-scroll{max-width:100%;overflow-x:auto;overscroll-behavior-x:contain}
.accumulation-scroll:focus-visible{outline:2px solid var(--focus);outline-offset:-2px}
#chart-accumulation{min-width:1120px;height:600px}
.accumulation-tabs{margin-top:var(--space-6)}
.difficulty-examples{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-4);margin:var(--space-6) 0}
.difficulty-examples figure{margin:0;padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);overflow-wrap:anywhere}
.difficulty-examples figcaption{font:13px/20px var(--font-sans);color:var(--ink-muted)}
.difficulty-examples strong{color:var(--ink)}
.difficulty-examples blockquote{margin:var(--space-3) 0 0;font:500 20px/28px var(--font-serif);color:var(--ink)}
@media(max-width:600px){
.glossary dl{grid-template-columns:1fr;gap:var(--space-3)}
#chart-accumulation{min-width:1040px}
.difficulty-examples{grid-template-columns:1fr}
}