:root{--ink:#123b53;--muted:#5f737f;--blue:#157c83;--pale:#edf7f7;--line:#dbe6e9;--paper:#fff;--soft:#f6fafb;--sage:#248e91;--coral:#c67f65;--radius:12px;--font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--font);font-size:16px;line-height:1.55}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #7499c9;outline-offset:4px}button:disabled{cursor:not-allowed;opacity:.45}.skip-link{position:fixed;top:-60px;left:20px;background:var(--ink);color:#fff;padding:10px 18px;z-index:20}.skip-link:focus{top:10px}.page-shell,.nav-shell{max-width:1190px;margin:auto;padding-left:32px;padding-right:32px}.site-header{border-bottom:1px solid 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@media(max-width:460px){.intro h1{font-size:42px}.intro-copy{font-size:16px}.eyebrow{font-size:11px}.stats-band{grid-template-columns:1fr 1fr;gap:22px 0}.stats-band>div:nth-child(3){padding-left:0}.stats-band>div:nth-child(2){border:0}.section{padding-top:34px}.nav-shell nav{font-size:13px;gap:18px}}
.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}.distribution-layout{display:grid;grid-template-columns:.85fr 1.5fr;gap:40px;padding:30px 34px}.distribution-ring{text-align:center;align-self:center}.distribution-ring svg{width:100%;max-width:320px;overflow:visible}.donut-segment{cursor:pointer;transition:stroke-width .2s,opacity .2s;outline-offset:4px}.donut-segment:hover{stroke-width:35}.donut-total{font:42px Georgia,serif;fill:var(--ink)}.donut-caption{font:14px var(--font);fill:var(--muted)}.distribution-badge{font-size:13px;color:var(--muted)}.distribution-badge span{font-size:18px;color:var(--ink);font-weight:650}.distribution-ring p{font-size:14px;color:var(--muted);margin:9px 0}.distribution-ring .text-button{font-size:13px}.type-bars{display:flex;flex-direction:column;justify-content:center;gap:3px}.type-bar{width:100%;background:transparent;border:1px solid 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p{margin:0;font-size:14px;color:var(--muted)}.search-box input{border:1px solid var(--line);border-radius:7px;padding:11px 14px;background:white;width:235px;font-size:14px;color:var(--ink)}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.topic-card{position:relative;background:var(--soft);border:1px solid var(--line);border-radius:8px;text-align:left;padding:16px 17px 21px;overflow:hidden;display:flex;flex-direction:column;gap:9px;color:var(--ink);min-height:103px}.topic-card:hover{border-color:#97b0d0;background:#f2f6fc}.topic-card>span:first-child{font-size:14px;line-height:1.4;font-weight:550}.topic-card>span:nth-child(2){font-size:15px;font-variant-numeric:tabular-nums}.topic-card 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0}.experiment-facts>div{padding:0 20px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:6px}.experiment-facts>div:last-child{border:0}.experiment-facts strong{font-size:25px;font-weight:550;line-height:1.2;letter-spacing:-.5px;font-variant-numeric:tabular-nums}.experiment-facts span{font-size:12px;line-height:1.5;color:var(--muted)}.cascade-summary{display:flex;align-items:flex-start;gap:16px;border-top:1px solid var(--line);padding:19px 0 0;margin-top:23px}.cascade-summary .pill{white-space:nowrap;margin-top:4px;font-size:11px}.cascade-summary p{font-size:14px;color:var(--muted);margin:0;line-height:1.6}.resource-details{border-top:1px solid var(--line)}.resource-details>summary{font-size:15px;font-weight:600;cursor:pointer;padding:20px 25px;display:flex;justify-content:space-between;list-style:none}.resource-details>summary::-webkit-details-marker{display:none}.resource-details[open]>summary span{transform:rotate(45deg)}.resource-grid{display:grid;grid-template-columns:1fr 1fr;gap:35px;padding:0 25px 24px}.resource-grid h4{font-size:14px;font-weight:550;margin:0 0 22px}.resource-row{display:grid;grid-template-columns:125px 1fr 74px;align-items:center;gap:9px;margin:19px 0;font-size:12px}.resource-row>span{line-height:1.4}.resource-row small{display:block;font-size:11px;color:var(--muted);font-weight:400}.resource-row>b{text-align:right;font-size:13px}.resource-track{height:12px;display:flex;background:#f2f4f6}.resource-track>i{height:100%;display:block}.resource-track>.reserved{background:repeating-linear-gradient(135deg,#fff 0,#fff 3px,#9ba3af 3px,#9ba3af 4px);border:1px solid #9ba3af}.example-type-tabs{display:flex;gap:7px;flex-wrap:wrap;padding:0 0 18px}.example-type-tabs button{font-size:13px;padding:8px 13px;border:1px solid var(--line);border-radius:20px;background:#fff;color:var(--muted)}.example-type-tabs button.active{color:var(--blue);border-color:#95b0d3;background:#edf3fa}.example-meta{padding:20px 28px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;align-items:center}.example-meta>div{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.example-meta #example-topic{font-size:14px;color:var(--muted)}.example-content{padding:26px 30px 10px;font-size:17px;line-height:1.75;overflow-wrap:anywhere}.prose-text{white-space:pre-wrap}.prose-text h4{font-size:16px;margin:10px 0 8px;line-height:1.5}.prose-text code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88em;background:#edf1f5;padding:2px 4px;border-radius:4px}pre{padding:18px 22px;background:#f2f5f8;border-radius:6px;overflow-x:auto;font-size:14px;line-height:1.6;white-space:pre}.katex{white-space:normal;font-size:1.08em}.katex-display{overflow-x:auto;overflow-y:hidden;padding:3px 0}.example-images{display:flex;align-items:flex-start;gap:20px;justify-content:center;flex-wrap:wrap;padding:6px 30px 16px}.example-images:empty{display:none}.example-images figure{margin:0;max-width:520px}.example-images img{max-width:100%;max-height:320px;object-fit:contain;height:auto;width:auto;display:block}.example-images figcaption{font-size:13px;color:var(--muted);text-align:center;padding-top:8px}.answer{margin:20px 28px;border:1px solid #d8e4da;border-radius:7px;background:#f7faf7}.answer summary{cursor:pointer;padding:14px 18px;font-size:14px;font-weight:600;color:#46624a;display:flex;justify-content:space-between;list-style:none}.answer summary::-webkit-details-marker{display:none}.answer[open] summary{border-bottom:1px solid #e1e9e1}.answer[open] summary span{transform:rotate(45deg)}.example-solution{padding:20px;font-size:16px;line-height:1.75;overflow-wrap:anywhere}.example-footer{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:18px 28px;border-top:1px solid var(--line)}.example-footer code{font-size:12px;color:var(--muted)}.small-note{font-size:12px;line-height:1.7;color:var(--muted);margin:15px 2px 0}.method-strip{margin-top:45px;padding:30px 0 0;border-top:1px solid var(--line)}.method-strip h3{font-size:25px;margin:0 0 25px;letter-spacing:-.5px}.method-strip ol{padding:0;margin:0;list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.method-strip li{display:flex;gap:11px;align-items:flex-start;border-top:2px solid #a6bad3;padding-top:15px;font-size:14px}.method-strip li b{font-size:12px;color:var(--blue);padding-top:2px}.method-strip small{display:block;font-size:12px;color:var(--muted);margin-top:4px}
@media(max-width:1000px){.nav-shell{gap:25px}.nav-shell nav{gap:18px}.distribution-layout{gap:22px;padding:25px}.experiment-intro{gap:20px}.experiment-controls{min-width:190px}.resource-grid{grid-template-columns:1fr;gap:15px}.resource-row{grid-template-columns:165px 1fr 90px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.method-strip ol{grid-template-columns:repeat(2,1fr)}.experiment-facts strong{font-size:23px}}
@media(max-width:780px){.distribution-layout{grid-template-columns:1fr;padding:18px}.distribution-ring{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:15px}.distribution-ring svg{max-width:250px}.distribution-ring p{font-size:13px}.type-bar{padding:8px}.topic-header{flex-direction:column;align-items:stretch;gap:15px}.search-box input{width:100%}.experiment-intro{flex-direction:column;padding:23px 20px 8px}.experiment-intro h3{font-size:22px}.experiment-controls{max-width:100%;flex-direction:row;align-items:flex-end;gap:18px}.experiment-controls select{max-width:100%}.experiment-controls>label{max-width:100%}.experiment-facts{margin:10px 18px 20px}.experiment-facts>div{padding:0 12px}.experiment-facts strong{font-size:20px}.experiment-facts span{font-size:11px}.chart-area{padding-left:17px;padding-right:17px}.chart-hint::before{content:'Swipe to explore the full chart. ';}.example-content{font-size:16px;padding:22px 20px 8px}.example-meta{padding:17px 20px}.answer{margin:17px 19px}.example-footer{padding:15px 18px;flex-wrap:wrap}.example-footer .text-button{font-size:13px}.cascade-summary{display:block}.cascade-summary p{margin-top:10px}.resource-grid{padding:0 18px 17px}.resource-row{grid-template-columns:112px 1fr 70px}.resource-row small{font-size:11px}.example-type-tabs{gap:6px}.example-type-tabs button{font-size:12px;padding:8px 11px}.topic-bottom>div{white-space:nowrap}}
@media(max-width:460px){.distribution-ring{grid-template-columns:1fr}.distribution-ring>div:first-child{max-width:270px;margin:auto;width:100%}.distribution-ring>div:last-child{margin-top:-18px;margin-bottom:12px}.topic-grid{gap:9px}.topic-card{padding:13px 12px 19px}.topic-card>span:first-child{font-size:13px}.experiment-facts{grid-template-columns:1fr;gap:15px;padding:15px 0}.experiment-facts>div{border-right:0;display:flex;flex-direction:row;align-items:center;gap:20px}.experiment-facts strong{min-width:100px;font-size:22px}.experiment-facts span{font-size:12px}.experiment-controls{display:block}.experiment-controls .checkbox-label{margin-top:10px}.example-meta{align-items:flex-start}.example-meta>div{gap:7px}.example-meta #example-topic{font-size:13px}.example-number{white-space:nowrap}.method-strip ol{gap:18px}.topic-bottom{gap:7px}.topic-bottom .text-button{font-size:12px}.type-bar-heading{font-size:13px}}
.brand-accent{color:#238b91}.nav-logo{width:78px;height:52px;object-fit:contain}.intro{padding-top:25px;padding-bottom:28px;align-items:center}.intro h1{font-family:var(--font);font-weight:750;font-size:60px;letter-spacing:-2.5px}.intro-identity{text-align:right;flex-shrink:0}.hero-logo{display:block;width:230px;height:auto;margin-left:auto}.intro-links{gap:4px}.brand{gap:2px}.site-header{background:rgba(255,255,255,.96);backdrop-filter:blur(12px)}
@media(max-width:780px){.intro{display:flex;gap:12px}.intro h1{font-size:46px}.hero-logo{width:145px}.intro-identity{width:145px}.intro-links{margin-top:0}.intro-links a{font-size:13px;text-align:right}.intro-links>span{font-size:12px}.nav-logo{width:60px;height:40px}.intro-copy{font-size:16px}}
@media(max-width:560px){.intro-identity{display:none}.intro h1{font-size:44px}}
/* UlumBench interactive figures: white paper, navy structure, teal interactions. */
.eyebrow,.section-counter,.experiment-intro .eyebrow{font-size:12px}.category-select{font-size:14px;display:flex;align-items:center;gap:10px;color:var(--muted)}.category-select select{max-width:220px;padding:8px 11px;border:1px solid var(--line);background:white;border-radius:6px;color:var(--ink);font-size:14px}.ranking-chart{padding:22px 26px 10px}.ranking-row{display:grid;grid-template-columns:22px 165px minmax(80px,1fr) 68px;gap:13px;align-items:center;padding:10px 0;font-variant-numeric:tabular-nums;font-size:14px}.ranking-number{font-size:12px;color:var(--muted)}.ranking-model{font-weight:550}.ranking-row strong{text-align:right;font-size:17px}.ranking-track{display:block;height:17px;background:#f0f5f6;border-radius:3px;overflow:hidden}.ranking-track i{display:block;height:100%;width:var(--rank-value);background:var(--rank-color);border-radius:3px;transform-origin:left;animation:rank-grow .65s cubic-bezier(.2,.7,.2,1) both;animation-delay:calc(var(--rank-order)*45ms)}.ranking-summary{font-size:13px;color:var(--muted);margin:5px 26px 22px}.aggregate-details{border-top:1px solid var(--line)}.aggregate-details>summary{display:flex;justify-content:space-between;padding:15px 24px;cursor:pointer;font-size:14px;list-style:none;color:var(--blue)}.aggregate-details>summary::-webkit-details-marker{display:none}.aggregate-details[open]>summary span{transform:rotate(45deg)}
.sankey-scroll{padding:14px 17px 0;overflow-x:auto;scrollbar-width:thin}.sankey-chart{width:100%;min-width:810px;display:block}.flow-column{font:600 12px var(--font);letter-spacing:1.8px;fill:var(--muted)}.flow-label{font:600 16px var(--font);fill:var(--ink)}.flow-count{font:13px var(--font);fill:var(--muted);font-variant-numeric:tabular-nums}.sankey-ribbon{opacity:.35;cursor:pointer;transition:opacity .25s;animation:flow-arrive .6s ease both}.sankey-ribbon.selected,.sankey-ribbon:hover{opacity:.72}.sankey-ribbon.dim{opacity:.065}.sankey-node{cursor:pointer;transition:opacity .25s}.sankey-node.dim{opacity:.35}.sankey-node:hover{opacity:1}.sankey-node:focus-visible{outline:2px solid var(--blue);outline-offset:5px}.flow-insight{margin:0 26px 22px;padding:20px 23px;background:var(--soft);border:1px solid var(--line);border-radius:9px;display:flex;align-items:center;justify-content:space-between;gap:25px}.flow-insight>div:first-child{display:flex;flex-direction:column}.flow-insight .eyebrow{margin:0 0 4px}.flow-insight strong{font-size:28px;font-weight:600;font-variant-numeric:tabular-nums}.flow-insight strong small{font-size:15px;font-weight:400;color:var(--muted)}.flow-insight>span{font-size:14px;color:var(--muted)}.flow-insight>div:last-child{max-width:300px;text-align:right}.flow-category-buttons{display:flex;flex-wrap:wrap;gap:7px;padding:0 26px 22px}.flow-category-buttons button{font-size:14px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);padding:7px 10px;transition:background .2s}.flow-category-buttons button span{font-size:12px;color:var(--muted);margin-left:7px}.flow-category-buttons button:hover,.flow-category-buttons button.active{background:var(--pale);border-color:var(--blue)}.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.topic-card{transition:transform .2s,border-color .2s,background .2s}.topic-card:hover{transform:translateY(-2px)}.topic-card>i{background:var(--blue);opacity:.6}.experiment-controls label,.experiment-controls .checkbox-label{font-size:14px}.compare-toggle{color:var(--ink)!important}.comparison-caption{font-size:14px;font-weight:600;margin:0 0 15px;padding-left:6px}.chart-series{animation:chart-arrive .35s ease both}.chart-series.series-hidden{display:none}.chart-legend button{border:1px solid var(--line);border-radius:6px;padding:6px 10px;background:#fff;color:var(--ink);font-size:14px;display:flex;align-items:center;gap:7px;transition:opacity .2s,background .2s}.chart-legend button:hover{background:var(--pale)}.chart-legend button[aria-pressed=false]{opacity:.5;text-decoration:line-through}.chart-legend{gap:8px}.point-readout{display:flex;flex-wrap:wrap;gap:10px 19px;align-items:center;padding:16px 18px;margin-top:18px;border-radius:7px;background:var(--soft);font-size:14px;font-variant-numeric:tabular-nums}.point-readout>b{color:var(--blue);margin-right:4px}.point-readout span{display:flex;align-items:center;gap:6px;color:var(--muted)}.point-readout span i{height:7px;width:7px;border-radius:50%}.point-readout strong{color:var(--ink);margin-left:3px}.horizon-stepper{padding:8px 29px 10px;display:flex;gap:16px;justify-content:center;align-items:center;font-size:14px;flex-wrap:wrap}.horizon-stepper>span{color:var(--muted)}.horizon-stepper>div{display:flex;background:var(--soft);padding:3px;border:1px solid var(--line);border-radius:7px;gap:3px}.horizon-stepper>div button{border:0;border-radius:5px;padding:8px 13px;background:transparent;color:var(--muted);font-size:14px}.horizon-stepper>div button.active{background:var(--ink);color:#fff}.experiment-facts strong{overflow-wrap:anywhere}.experiment-facts span{font-size:13px}.resource-row small{font-size:12px}.example-type-tabs button{font-size:14px}.example-panel{animation:chart-arrive .35s ease}.example-panel h3{font-size:24px;letter-spacing:-.5px;margin:25px 30px 0}.example-content{max-height:none}.example-footer .subtle{font-size:12px}.pill{font-size:13px}.answer{background:#f4faf9;border-color:#c9e4df}.answer summary{color:#176e6b}.panel-note,.small-note{font-size:13px}.nav-shell nav a{position:relative}.nav-shell nav a.active{color:var(--blue)}.nav-shell nav a.active::after{content:'';height:2px;position:absolute;left:0;right:0;bottom:-8px;background:var(--blue)}
@keyframes rank-grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes chart-arrive{from{opacity:.2;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes flow-arrive{from{transform:translateX(-4px)}to{transform:translateX(0)}}
@media(max-width:1000px){.ranking-row{grid-template-columns:20px 150px minmax(80px,1fr) 65px}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:780px){.ranking-chart{padding:15px 17px 6px}.ranking-row{grid-template-columns:20px 137px minmax(50px,1fr) 63px;gap:9px}.ranking-summary{margin:6px 17px 18px}.category-select{flex-wrap:wrap}.sankey-scroll{padding-left:8px;padding-right:8px}.flow-insight{margin:0 16px 18px;padding:16px;flex-wrap:wrap;gap:17px}.flow-insight>div:last-child{text-align:left;max-width:none}.flow-category-buttons{padding:0 16px 18px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.horizon-stepper{padding-left:15px;padding-right:15px;gap:12px}.point-readout{padding:13px;font-size:13px}.example-panel h3{margin:22px 20px 0;font-size:22px}.experiment-controls{align-items:center}.experiment-facts span{font-size:13px}}
@media(max-width:460px){.ranking-row{grid-template-columns:17px 1fr 63px;gap:8px;padding:11px 0}.ranking-track{grid-column:2/4;grid-row:auto;height:9px;margin-top:-3px}.ranking-row strong{grid-column:3;grid-row:auto}.ranking-model{font-size:14px}.ranking-track+strong{grid-row:auto}.ranking-row{position:relative}.ranking-row strong{position:absolute;right:0;top:9px}.ranking-model{padding-right:68px;grid-column:2/4}.ranking-row .ranking-number{align-self:start}.horizon-stepper>div button{padding:8px 9px}.topic-card>span:first-child{font-size:14px}.flow-insight strong{font-size:25px}.intro h1{font-size:42px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}